ninth young researchers conference materials sciences and engineering pot

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NINTH YOUNG RESEARCHERS CONFERENCE

MATERIALS SCIENCES AND ENGINEERING

December 20-22, 2010, Belgrade, Serbia

Serbian Academy of Sciences and Arts, Knez Mihailova 35

Program and the Book of Abstracts

Materials Resea Institute of Teel Serbian Academy of S of Serbia, 8 of the nd Arts

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NINTH YOUNG RESEARCHERS CONFERENCE

MATERIALS SCIENCES AND ENGINEERING

December 20-22, 2010, Belgrade, Serbia

Serbian Academy of Sciences and Arts, Knez Mihailova 35

Program and the Book of Abstracts

Materials Research Society of Serbia and

Institute of Technical Sciences of the Serbian Academy of Sciences and Arts

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Book title: Ninth Young Researchers Conference - Materials Sciences and Engineeri Progeam and the Book of Abstracts

Publishes

Institute of Technical Sciences of the Serbian Academy’ of Sciences and Arts Knez Mihailova 35/1V, 11009 Belgrade, Srl

‘Tels +381-11-2636894, fax: 2185263 hgp//www Editor:

Prof, Dr Nenad Ignjatovie ‘Technical Editor:

Aleksandra Stojigié

Printer: Copy Planet

Brankova 12, 11000 Belgrade, Serbia Tel: +381-11-3036545, fax: 3036546 hupe//www.copyplanetrs a 130 copies onus wma apne Sdanoroes Cp, booerst 64807/0I8 00)

‘YOUNG Researchers Conference Material Sciences andl Enginecring (952010; Beograd)

Progam; fd dae Book of Abstracts / Nines Young Researchers Coafecuce Matra Seas sal Expincering, Decne 2222, 201, Bele, Seba: [rgaize by] Materials Research Society of Sebia and laste of Techaical Sciences ofthe Serbian Academy of Senses and Ans [itor Nenad Ignisove) ~ Bela Insite of TeshnislSeeores of SASA, 2010 Belge = Copy Plane) = XIV, sda 30em

“ind 130, -Repnae,

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Ninh Young Rescurchers Conference ~ Materials Seine und Engincering December 20.22, 2010, Hall, SASA, Kner Mihailova 35, Belgrade, Serbia

Aim of the Conference

‘Main aim of the conference isto enable young researchers (post-graduate, master of doctoral student, ora PAD holler younger than 35) working in the field of materials science and enginoering, to meek tie colleagues and exchange experiences about thet research

Topies

Nanostructared materials

[New synthesis and processing methods (Materials for high-technology applications Biomater

Scientific and Organizing Committee Commi

Nenad Ignjatovie Institute of Technical Sciences of SASA B Members

Zora Ajdukovie Medical Faculty Ni, Serbia

Nikola Csjetianin Kemal Deli Faculty of Physical Chemistry, Belgrade Faculty of Metallurgy and Technolo Miroslav Dramiganin Institute of Nuclear Seenees “Vinéa, Bel

Jasimina Grbovie Novakouig Institute of Nuclear Sciences “Vina, Bel Dorde Janackovie Faculty of Technology and Metallurgy Belgrade, Serbia Ralph Keachnort ‘Technical University of Berlin, Germany

Nebojga Mitrovid ‘Technical Faculty, Caéah,

Zeljka Nikitovie Nebojfa Nikolic Institue of Physics Belgrade, S Institute of Chemistry, Technology and Metallurgy, Belgrade, Serbia Nebojfa Roméevig Institute of Physics Belgrade Serbia

redo Skapia Institute Joe Stefan Ljubljana, Slovenia Viainir aie ‘Technological Facully, Novi Sa Serbia

Edin Suljowruie Instiaie of Nuclear Seienoes “Vines, Belgrade, Serbia Vuk Uskokovie University of California in San Francisco, CA, USA Conrerene

‘Aleksandra S

oie Institute of Technicel Seiences of SASA, Belgrade, Serbia Results of the Confer

We

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Ninh Young Rescurchers Conference ~ Materials Seine und Engincering December 20.22, 2010, Hall, SASA, Kner Mihailova 35, Belgrade, Serbia

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering December 20-22 2010, Hall , SASA, Kace Mihailova 38, Belarade, Serbia

Programme

Ninth Young Researchers Conference Materials Science and Engineering

Monday, December 20, 2010

10.00 Day of the Institute Sciences and Arts, Great Hall of SASA, 2" floor of Technical Sciences of the Serbian Academy of ‘Opening Ceremony of the Ninth Young Researchers Conference — Materials Science and Engineering: Prof Dr Nenad Ignjatovié,

President of the Organizing and Programming Committee

Cocktail in the Club SASA, mezzanine floor

13.00 Registration, Hall 2, 1" floor SASA

14.00- 14.15 Welcome speech by Prof Dr Nenad Ignjatovi

14.15— 17400 1" Session — Nanotechnology and Advanced Materials

‘Chairmen: Prof, Dr Vladimir Srdié and Prof Dr Miroslav Dramiganin 14.15 — 14.30 Synthesis of strontium titanate core! nickel ferrite shell nanoparticles Bojana Mojie!, Milan Nikolic! Jan Dusza’, Vladimie Seié!

“Depariment of Maverials Engineering, Faculty of Technology, University of Novi Sad, Serbia, “Institute of Materials Research, Slovak Academy af Sciences Kotiee, Slava Republic

14.30— 14.45 Comparison of titania nanopai ‘Stevan M Ognjanow Vladimir V, Sec!

‘Department of Maxerials Engineering, Faculty of Technologs, University of Novi Sad, Serbia, "Nanoparscle Process Technology, Deparment of Engineering Science land Center for Nonoimegraion Duisburg-Essen (CeNIDE), University Duisburg Essen, Duisburg, Germans

icles synthesized by CVS and sol-gel methods "van Sjepovie, Rutiea Djenaié, Markus Viet”,

“Microwave synthesis and characterization of Pt and PiRhSn eletrocatalysts for ‘ethanol oxidation S,Rietanauie, D, Tipkosiệt D Pole 1 Rogan’, D Mini, A ripkovie!, VM Jovanovie ICTM, Department of Blctrochemistrs.Univeriyof Belgrade, Belgrade, Serbia, ‘Materials Seionce Division, Argonne National Laboratory, Argonne, IL, USA ‘Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serb,

“Facultyaf Physical Chemises, University of Belgrade, Belgrade, Serbia

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5 Nano-sized silane coati ‘and adhesi properties

Zelika Jovanovie!, Jelena Bajat', Ingrid Milosev", Vesna Miskovig-Stankovié! Faculty of Technology and Metallurey University af Belgrade, Belgrade, Serbia, Yotef Stefan Institute, Department of Physical and Organie Chemisty Ljubljana, Slovenia

1g as new materials in corrosion protection promotion: the study of composition and electrochemical

15.18 18.30 Carbon -based materials for supercapacitors Yulia G Mateyshing, A, 5 Ulihin, N.E- Uvarov

Insite of Solid State Chemistry and Mechnachemistry, Novosibirsk, Russia

15.30 15.45 Corrosion behavior of mild steel in COzatmosphere Aleksandra Debelihovie! Ivana Jeveemovie!, Vesna Mishovie-S

Nghệ, ‘Faculty of Technology ond Metallares, University of Belgrade, Belgrade, Serbia, “Insite for Corrosion ad Multiphase Technology, Ohio University, Athens, OM, 0

ankovie!, Sraian

15,48 — 16,00 Electrochemical behavior of nanostructured MuO,/C(Vulean) composite ‘aqueous electrolyte LiNOs

Milica Vujkovie, Nikola Cujetiéania, Nemanja Gavrios, Ivana Stojkovie, Slavko Meats

Faculty of Physical Chemisiry, Belgrade, Serbia

16.00 — 16.15 Current — voltage characteristics of carbon nanotube FETS Dusan B_Vasie, Petar M Lukic!, Vian M Lukié

‘University of Belgrade, Faculty of Mechanical Engineering, ‘NoSia Siemens Nenorks Srbija d.o.o Belgrade, Serbia

16.15 - 16.30 Inquiring the local elastic properties of commonly used pharmaceutical .exeipleats by nanoindentation techniques, Biljana, Govedarica’, Hija Tié!, M Skarabor, 1, Musevig%, Sine Sreig! "Faculty of Pharmacy, Department of Pharmaceatical Technology Universiy Liubljana, Slovenia, “Insite lozef Stefan, Depariment of Condensed Matter Physics, Ljubljana, Slovenia

16.30 16.45 Age hardening potential of an ALL6 wt." Mg alloy with Cu addition ‘Ana Alil!, Miljana Popovic, Tamara Radetie™, Endce Romhanji™ Bore Jegdie! ‘Goa Instine, Belgrade, Serbia, ‘Dept of Metall Eng., Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia

16.48 — 17.00 Properties of electrochemically deposited NiFe,W,alloy powder Natasa Cinavig", Lenka Ribie-Zelenavic', Neha Mitcovie', Miroslav Spasojevie ‘Aleksa Martie! ‘Valiaonica baka Sevojne A.D, Sevejno, Serbia, “Faculty af Agronomy, University

of Kragujevac, Cacak, Serbia, Technical Faculty Cacak, University of Kragujevac Can Serbia

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering Decent 20.22 2010, Hall 2, SASA Knez Mihailova 35, Belgrade, Serbia

17.00-17.15 Break

17.15 - 19.15 2" Session — Synthesis and Processing 1748-1720 1730-1745 1748-1800 18,00- 18.15 18.15 1830 Si 1830-1845 1848 - 19.00

(Chairmen: Dr Ralph Krachnert, Nebojia Nikolié Prof Dr Nikola Cvjetiéanin and Dr ‘Synthesis and dielectric properties of calcium copper titanate (CCTO) based

Zoran Stojanovig, Lljana Veselinovie, Smilja Markovie, Dragan Uskokovie Institute of Technical Sciences ofthe Serbian Academy of Sciences and Art, Belgrade, Serbia

jynthesis, stability ranges, structural characteristics and electrical conductivity of BUCRFEVOX solid solutions Eugene V_ Velichko!,

ES Buyanova!, MV Morozovs', S.A Petrova

‘Ural Sia University, Yekaterinburg, Russa, "Instiaue of Merallurgy of the Ural Division of RAS, Yekaterinburg, Russia

Crystal growth of solvothermally obtained LiFePO, in dependence of synthesis

Maja Kuzmanovig’, Dragana Jugovis!, Miodrag Mite", Nikola Cujetiganin®, Sree Skapin' Dragan Uskokovie! “Instimte of Technical Sciences of the SASA, Belgrade, Serbia, "The Vinéa hnsusue, Condensed Marier Physics Laboravory, Belerae, Serbia, “Faculte of Physical Chemists, University of Belgrade, Serbia, “Jose Stefan” Insutute, Lublin, Stovenia

‘The synthesis of tungsten trioxide gel by dissolution of tungsten in hydrogen peroxide and its transformations during the heat treatment in oxidation and reduction atmospheres

Radovan Geosijevig, Slavko Mentus

University of Belgrade, Faculty of Physical Chemistry, Belgrade, Serbia

rich, Diniel Balizs, Emoke Volentia, Zoltin Hérvslgyi Budapest University of Technology and Economics, Department ef Physical Chemistry and Materials Science, Laboratory for Physical Chemisiry Budapest Hungary

Control of pulse plasnua transition state for enhanced processing efficiency Iwan Popovie, Miodrag Zlatanovie, Djondje Klis

School of Elecitical Engineering, University of Belgrade, Belgrade, Serbia

Microstructure evo

Darke Kosanovie!, Suzana Filipovié

Momdilo M Rist “Instie af Technical Sciences of SASA, Belgrade, Serbia, “Serbian Academy of Seiewees and Acts, Belgrade, Serbia

ion and sintering kinetics of ZnO Nina Obradovie!, Vladimie Pavlovie!

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering December 20-22 2010, Hall , SASA, Kace Mihailova 38, Belarade, Serbia 19,00 — 19.18 Pulse plasma proces turbine components

Djotdje Klisi, Miodrag Zlatanovie, lan Popovie School of Electrical Engineering, University of Belgrade, Belgrade, Serbia

gas a candidate technique for surface treatment of wind

Tuesday, December 21, 2010 08.30 Registration, Hall 2, 1" floor SASA

09.00 - 11.18 3° Session ~ Synthesis and Engineering of Biomaterials of Dr Nenad Ignjatovié, Prof Dr Djordje Janaékovig and Dr Vuk Uskoko

09.00 09.15 The influence of powder characteristics on two-step sintering behavior of hydroxyapatite Miodrag Lokic, Zoran Stojanovie,1ljana Vesetinovie!, SreGo D, Skapin? Ines Bratko" Smilja Markovie, Dragan Uskokovie! "Insite of Technical Sciences af the Serbian Academy of Sciences and Art, Beleraite, Serbia, “Jozef Stefan Instinue, Ljubljano, Slovenia

Green synthesis of PGA-capped silver nanopar Igor Savanovie!, Magdalena 5

Uskokovie! “Instimte af Technical Sciences ofthe Serbian Academy of Sciences and Arts, Belgrade, Serbia, “oSef Stefan fnstire, Liublana, Slovenia, ` Vinễn fastitute of Nuclear Sciences, Belgrade, Serbia

les and their characterization -vanavic!, Sreeo Skapin", M Markovie’, Dragan

09,30 -09.45 Nucleation of biomimetic hydroxyapatite Bozana Colovie, Vukoman Jokunovie

Insite of Nuclear Sciences "Vinca", Laboratory for radiation chemistry and physics Belgrade, Serbia

09.45 10.0 Structural characterization of synthetic and biological earbonated hydroxyapatite

Ljiljana Veselinovie!, Miodrag Luk! jijana Karanovie!, Nenad lgnjstovis Sinijs Markovie!, Dragan Uskokoviel “insime of Fecinjea Sciences ofthe Serbian Academs uf Sciences and Art

Belgrade, Serbia, ‘Laboratory for Crstallographs, Faculty of Mining and Geology University of Belgrae, Belgrade, Serbia

10.00 10.15 Evaluation of alginate hydrogels in a biomimetic bioreactor applying dynamic ‘compression Jovana Zi

Jasmin Stajkovska, Bojana Obradovie

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10.15 - 10.30 Evaluation Jasmina Stajkouska, Zelka Jovanovie, Danijela Kostie, Jovana Zvieer, of novel alginate nanocomposites for biomedical applications nana Jovremovie, Maja Vukasinovig-Sekulic, Vesna Mishov

Bojana Obradovie

Faculty of Techuology and Metallurgy, University of Belgrade, Belgrade, Serbia

Stankovic,

10.30 - 10.45 ‘The influence of diferent polymerization mechanisms on thermal properties of poly(L-lactide)

Martina S, Bastak!, Natasa D Borie! Jaroslave K Budinski-Simendig, Radia Z Ralgevie!, Ljubi B Nikole, van Risse! "University of Nov Sad Faculty of Technology, Novi Sad, Serbia,

“University of Nik, Faculty of Technology, Leskovae, Serbia

1045 ~ 11.00 Investigation of electrochemically synthesized Ag/PVP nanocomposites: Bioni

Maja Vukasinovie-Sekutig, Aleksandra Pee.Gnlje, Mijana Rietie, Vesna

MiSkovie-Stankovie

Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia 11.00- 11.15 11 -12.00 Break 1200- 14.30 4đĐesion~ Applieationof a Ajduko

Chairpersons: Prof Dr Zor Obradovié and Prof Dr Bojana

12.00 12.18 Antibacterial activity of hydroxyapatitesitver nanocomposite Marija Vakomanosic™® U Repnik', T Zavasnik, Stedo D Skapin!, Dragan Uskokovie!, Danilo Suvorov! ‘Deparment of Advanced Material, lof Stefan taste, jublian, Slovenia “state of Technical Sciences of SANA, Belerade, Serbia, ‘Department of Biochomisiry and Molecular Biolog Jet Stefan Institute, Lubljana, Slovenia

12,15 -12.30 Protective effects of oral applied fullerenol Ca(OUD):<nano particles, in rats alter a single dose of DOX Ivana five’, Aleksandar Djonjeve, Brana Srdjenovi, Saka Vukrivosi% Jan his Rade ijae™

University of Novi Sa, Faculty of Science, Departmen of Cheaistr, Biochemistry ind Environmental Protection, Novi Sad, Serbia, ‘University of Novi Sad, Faculty of Medicine, Depariment uf Pharmacy Novi Sai, Serbic, Faculy of Pharmacs, The Chair of Phormacenical Biolog University of Lnbljana, Ljubljana, Slovenia

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering Decent 1230-1245 1248- 13.00 13.00- 13.15 1315-1330 1330-1345

20.22 2010, Hall 2, SASA Knez Mihailova 35, Belgrade, Serbia

Distribution of nanoparticles of fullereno! in human serum in presence of doxorubicin Danica Radmanovsc!, Al

Rade Injac® Ivana lecvie Ske’

sandar Djordjevie!, Alenka Mentel’, Mari

‘University of Novi Sad, Faculey of Science, Department of Chemistry, Biochemistry ‘and Environmental Protection, Novi Sad, Serbia, “Insts Jozef Stefan, Ljubljana, Slovenija, ‘University of Belgrade, Faculty of Biology, Beosrat, Srbija, “Faculty of Pharmacy, The Chair of Pharmaceutical Biologs, University of Liubliana,

Ljubljana, Slovenia

Danijela Kosti Jasmina Stojkovska, Bojana Obradovig

Faculty of Technology aid Metallurgy, University of Belgrade, Belgrade, Š

bia

“The characterization of HAP/Lig coati concentrations and thet

Sanja Erakoviel Djorije Veljoviel, Papa N Diout ‘Mitre, vana Satie, Zorica Furanié', Vesna Miskovie Stankovic!

*Facaky of Technology and Meslluray University of Belgrade, Belgrade, Serbo, ? Département des sciences da bois ete a forts, Université Laval, Québec, Canad, “Vingu hnstnute of Nuclear Sciences, University of Belerade, Belgrade, Seria,

‘invite far Oncology and Radiology af Serb, Belgrade, Serbia

igs containing different lignin

In vitro evaluation of an based on hydroxyapatite

orien Ajdokovie’, Jelena Miligevie!, Milica B Petovie!, Nadica Djondjevie, Mladenovie Antic B Kocie”, Nenad lanjatovie', Dragan Uskokovie!, Vojin Savi "Faculty af Medicine, Ni, Clinic of Stomatology, Department of Prosthodontics, Nik Serbia, “Faculty of Medicine, University of Pristina lacated in Kasovska Mitrovica Clinic wf Stomuologs, Deparimen af Prowadontcs, NB, Serbie, Insime of Public Heath, Center for Microbiology Nik, Serbia, "Institute of Technical Seiences ff the Serbian Academy of Sciences and Ans, Belgrade, Serbia, "Faculty of Mealicin, Ni, Insnute of Biomedical Research, Nis, Serbia

imierobial activity of nano composite biomaterials

Evaluation compensation of an osteoporotic rat bone with Ca/Co-ttAp nanoparticles

Zorics Ajdkovie!, Milica B, Ptsavig! elena Miligevic!, Nadica Djoniiovie™, Nenad lenjatovie’, Dragan Uskosovie!, Vin Sie!

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering December 20-22 2010, Hall , SASA, Kace Mihailova 38, Belarade, Serbia 1348-1400 Determination of clindamycin in pig plasma after implantation of poly(D.L liquid chromatography-tanddem mass speetrometry lactide-co-glycolidevydroxyapatitelclindamycin core-shell nanosphere by

Gorica Vukovie!, Sanja Larig", Dragana Sunjk, Vojislava Buri, Ivan Saréev Marija Vukomanovie", Nenad ignjatovie®, Dragan Uskokovie! Insiine of Public Health of Belgrade, Belgrade, "Faculty of Agricul, Novi Sad,

‘Medical Faculty, Novi Sad, ‘Intute of ecknical Sciences of the Serbian Academs “of Sciences and ats, Belgrade, Serbia

14.00 ~ 14.15 Eifect of caseinphosphopeptide-amorphous calcium phosphate and enamel remineralisation “Tamara Perc), Dejan Markovié!, Radia Bojan Pemovie" Jantie Heineman

"Faculty of Demistry, University of Belgrade, Belgrade, "Faculty of Technotegy and Metallargs, University of Belgrade, Belarade "Demisary Clini of Vajvodina, University of Nov Sad, Nov Sad, Serbia

woride on

Vesna Radojey

‘material in endodon

14,15— 14.30 Mineral wioxide aggregate as an altern for teeth with incomplete root development

Bojan Petsovic", Dejan Markovie", Tamara Peri’, Vukoman Jokanovie® ‘Department of Paediatric and Preventive Demisirx Dentisiry Clini af Vojvodina, Faculty of Medicine University of Novi Sa, Serb, ‘Department of Paediatric and Provenive Demtisiey, Faculy of Denisty, University of Belerade, Serbia, ‘Laboratory for radiation chemistry and physies, institute of Nuclear Sctences Vinca, Belgrade, Serbia

treatment

1430-1530 Break

1530-1730 Sth Session — Polymer Science

Chairpersons: Dr Edin Suljovrujié and Prof, Dr Gordana Cirié

1530-1545 Redox-set Benjamin S Gyarmati, Andris Sil

Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Laboratory of Soft Matters, Bulapest, Hungary

18,45 ~ 16.00 Effects of composition and erossinker content on swelling and mechanical properties of poly(2-nydroxyethyl aerylateftaconie ack) hydrogels divans 8 avatevie' Maja M Mi, [Ai LH, Suljovrajie! Simona Lj Tomi! “Pacts of Technology and Metallarss Belgrade, Sevbi,

“Ving Instn of Nuclear Sciences, Belerade, Serbia

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16.15 16.30 Microsicuture and crystallinity of oriented polyolefin “Tiana Mugrnie Dajan Miligevis, A Leskove, Miodrae Mite love

acuity of Physical Chemivr, Universi of Bere, Relate, Serbia “Vinca inate of Nuclear Sciences, University of Belanae, Belgrade, Serbia

` Bdin

16.30 ~ 16.4% Polytitaeonie aeid) /pectin blends as membrane materials Aloksandri Nej€

Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Se

16.45 - 17.00 Kinetics of pertechnetate removal by a methacrylate copolymer

Danijela D Maksin', Radmila V Hercigonja", Magdalena 2 Lazarevi, Maja J Zamis", Aleksandra B, Nostasovie® Vind Insitute of Nuclear Sciences, University of Belerade, Belgrade Serbia,

“Faculty of Physical Chemisrs, University of Belgrade, Belgrade, Serbia, “ICTM- Comer for Catalssis and Chemical Engineering, Universiy of Belgrae, Belgrade Serbia, ICTM-Center jor Chemistrs, Polymer Department, University of Belgrade Belgrade, Serbia

1osunctionalized glycidyl

17.00- 17.15,

Surface characterization of polyurethane nanocomposites Vesna Simendig, van S Ristie, Nevena Vukie

Faculty of Technology, University of Novi Sad, Novi Sad, Serbia 17.15 - 17.30 El Dalibor L, Sekulig, Milo V Satarie, Milos B, Zivanoy Faculty of Technical Sciences University of Novi Sad, Serbia

Wednesday, December 22, 2010 09.00- 12.30 6" Session - Theoretical Modelling of Materials

sons: Dr Zelika Nikitovié, Dr Nikola Novakovié and Prof Dr

(09.00 - 09.15 Stable configurations of graphene based structures Natasa Lavi E, Dobardzie, Milan Damnjanovie

Nanolab, University of Belgrade, Faculty of Physics, Belgrade, Serbia

(09.15 09.30 DFT study of hydrogen adsorption Dragana D.Vasie, Igor A, Pati, Slavko V Mentus on Pt(100), P{(110) AND Pu(111) surtaces Faculty of Physical Chemists, University of Belerade, Belgrade, Serbia

09.30 09.45 AB initio calculation Radojka Vujasin, Milan Seneanski= of the structure and partition funetions of BC:

“Laboratory of Material Sernces, Vinca Inttate of Nuclear Sciences, Belgrade Serbia, ‘Innovation center of the Faculty of Chemistry, Belgrade, Serbia

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09.45 ~ 10.00 Energy spectrum ofa circular graphene quantum dot ina perpendicular ‘magnetic field Marka Grajié, Milan Tadié

Faculty of Elecrricat Engineering, University of Belgrade, Belgrade, Serbia 10.00 10.18 Research of dynamic compaction in powder environments 4.0 Toxpinets,E.V, Zhukov, M.A Dinvitiews, V.N Leitsin

Russian State University “Toman Kana”, Katiningrad, Russia 10.15 ~ 10.30 Analysis of specific transmit ‘quantum well

Nemanja Niketi Vitomir Milanovig, Jelena Radovanovie School of Elecivicul Engineering, Belgrade, Serbia

ion maxima in rectangular semiconductor

1030-11.00 Break

11.00 11.15 Influence of thermal memory on the thermoelastic bending component of photoacoustic response Mioljub Neti, Marien Popovié, Slobodanka Galovié

The “Vina” Institute of Nuclear Sciences, University nf Belgrade, Belgrade, Serbin

11.15 11.30 Application ofthe progressive failure criteria in determining delan tilayer composite materials with an interlayer erack Dragan Cuksnoviel, Aleksandar Radakovié", Mirostay Zivkovie!

“Faculty of Mechanical Engineering, Kragujevae, State University in Nov Pozar, Serbia tion of

11.30 11.45 Determining the laminate “safe” stress zone in different ‘Aleksandar Radakovie!, Dragan Cukanovié', Dragan MilosavTjevie types of loa

Stare University in Novi Pazar, "Faculty of Mechanical Engineering, Kragujevac: Serbia

11.48 - 12,00 Electromechanical characterization of helically coiled earbon nanotubes, Zoran P Popovis, lvanka Milosevic, Milan Damajanovié University of Belgrade, Faculty of Physics, Belgrade, Serbia

12,00 ~ 12.15 The critical parameters of ultra-thin molecular film for monochromatic ', Ana Setajsie-Tomie’, Jovan P Setraigie

‘Gniversity of Novi Sad, Faculty of Sciences, Depariment of Physies, Novi Sad Vojvodina ~ Serbia, “University of Novi Sad, Meatcal Faculty, Department of Pharmacy, Novi Sad, Vojvodina ~ Serbia, ‘University of Banja Luka, Faculty of Technology: Banja Luka, Republic of Srpska ~ B&H ‘University of East Sarajevo, Faculty of Technology, Zvorni, Republic of Srpska ~ B&H

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12,18 -12.30 Phonon contrib structure

Igor, Scraie, Dragana Rodis, Igor Mandié, Stevan Armakow Jean P.Soeatie

University of Novi Sad, Faculty of Sciences, Bepariment of Physics, Novt Sad, Vojvodina ~ Serbia

mn in the superconducting properties of ultra-thin fm Nenad V Delis,

1230-1300 Break

13.00- 15.30 7 Session - Composite Materials and Thin Films

‘Chairpersons: Dr, Jasmina Grbovié Novakovie, Dr NebojEa Nikoli€ and Dr Srego Skapin 13.00 13.15 Shoe-based multifunct Storage and struct

[Noma Maki, Remon Pop-tliev

Uuiversiiy of Ontario stitute ef Technology: Oshawa, Omari, Canada

1318 ~ 13.30 Exchange kinetis and difusion of oxygen in LaasSraFesNinOs.— “Cu, 9: composites with different microstructures Yu'8 Okiupia! MLV Ananye", Yulia G, Mateysbina NI Uvaro! ‘ nsaue of Solid State Chemistry and Meckanochemisy SB RAS, Novosibirsk Rusia, Institute of High Temperate Electrochemistre UB RAS, Yekaterinburg,

13.30— 13.45 The effect of low-frequency ascllations on the AL-TI-Zr melts for synthesis of aluminide and earbide nucleating phases Aleksey Dolmatox, Elvira Popova, Ludmila Bodrova, Edvard Pastukhoy,

Andrey Bykov

Instaie of Mewallurgy UD RAS, Ekaterinburg, Rusa

13.45 ~ 14.00 Dielectrcal properties of EVA-carbon black composites Kosta Simonovie!,F: Marinkovie! V CubrovielJ- Dojéilovi!, Dusko Dude, V Dokovie?

Faculty of Physics, Belgrade University: Belgrade, Serbia “Insitute of Nuclear Sciences "Vinéa”, Belgrade, Serbia

14/00- 14.15 Hydrogen desorption from Mgll,-VO; composite Sinja Milotevie, Zljka Rashovie, Sanda Kuk, 1 jetisanin, Jasna Grhovie Novakouie ‘Faculty af Physical Chemisiry, Belgrade, Serbia

“Vinca sie of Naciear Sconces, Belgrade, Serbia

ana Matovié, Nikola

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14.30 14.45 Structural and electrical properties of TiO, (x<2) thin films obtained by reactive de sputtering Dejan Pjevié, Davor Perusko, Momir Milosavlievié, Velimir Milinovie Vinca® Insti of Nuclear Sciences, Belgrade, Serbia

14445~ 15.00 Characterization of the plasma electrolytic oxidation ofa electrolytes that produce barrier oxide films

Marja Pethovi!,S, Sojadinavic!, R, Vasile 1 Belea!,B, Kasaliea!,Z Ned’, Lj Zekovie' "Eaculty of Physics, University of Belgrade, Belgrade, Serbo, Faculty of

Environmental Governance and Corporate Responsibility, Educons Universit Sremska Kamenica, Serbic, Faculty of Physical Chemisiry, University of Belgrade, Belgrade, Serbia

15.00-

5 Micrastructure and electrical characteristics of modified slumo- Jena M, Purenovie', Vesna Paunovie!, Vojiluy Mi 2

Faculty of Elecsronic Engineering, University of Nis, NW, Serbia, “Insite of Technica! Sciences af the Serbian Academy of Sciences and Arts, Belgrade, Serbia

Properties of some low melting lead-free alloys for ecological solders production Aleksandra Milosavljevie!, Dragana Zivkovie", Ana Kostov", Radiga Todorovie! ‘Mining and Metallurgy Invinute, Bor, Serbia

“University in Belgrade, Technical Faculty in Bor, Bor, Serbia

1530-1645 Break

1645-1815 8 Session ~ Various Problems of Materials Science

Novakovié, Dr Nebojéa Nikolié and

‘Chairpersons: Prof Dr Kemal Deli Dr Jasmina Geb

16.45 ~ 17.00 Kinetics of metoprolol tartrate photocatalytic degradation Sanja J Kler, Daniela V Sojic, Biljana F, Airamovie

University of Novi Sed, Faculty of Sciences, Deparment of Chemistry, Biochemistry sand Environmental Protection, Novi Sad, Serbia

17,00 17.15 Isothermal kinetics of water exchange in silica hydrogel Aleksandra Pavigevie, Vojkan Ragonjic Faculty of Physical Chemisiry, Belerade, Serbia

‘Voltametric determination of linuron insecticide in methanol using 2 boron doped, glassy earbon and commercial glassy carbon eletrode Jelena Donljvie Ana Kalas! Ksenija Kumi, Zoran Jovanovil,Zonun

LLausevie, Milovan Purenovie®, Tatjana Trie-Petrovié!

“Laboratory of Phssies (010), Vinca Institue of Nuclear Sclences Belgrade, Serbia, “Faculty of Sciences and Movhermaties, Depariment of Chemistry University of Nis, Nis, Serbia

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Ninh Young Researchers Conferenoe ~ Materials Seience and Engineering Decent 20.22 2010, Hall 2, SASA Knez Mihailova 35, Belgrade, Serbia

1730-1745 1748 18.00 18,00 1815 1830

Use of natural zeolite for removal of Cu({H) from aqueous solutions in a ‘Aluidized-bed reactor

SHljan Vidovié, Nevenka Raji, Bojana Obradovie Faculty of Technology and Mezalluray, University of Belgrade, Belgrade, Serbia XRD and SEM analysis of urinary stones

Miljans Miljevie!, Aleksandra Rosie

‘Alaska 29/5, Belerae, Serbie, “Faculty of Mining and Geology, Belgrade, Serbia

‘Computation of pressure ofthe liquid earbon dioxide in tank during summer storage conditions Mirjana Pruulovie, Milan Prokolab Stevan Budimit

Institme Gos, Belgrade, Serbia

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Ninth Young Researchers Conferen

Dec per 20.22 2010, Hall 2, SASA Knee Mihailova 35, Belgrade, Serbia “Materials Seience and Engines

Mì

Synthesis of strontium titanate core/ nickel ferrite shell nanoparticles

Bojana Mojic', Milan Nikolie', Jan Dusza", Vladimir Srdi¢!

‘Department of Materials Engineering, Faculty of Technologs, University of Novi Sad, Serbia *Insiute of Materials Revearch, Slovak academy of viences, Kotice, Slovak Republic Over the last decade, there have been immense effects © fabrivate core-shell materials with tailored properties, This work presents « possible approach for coating strontium titanate nanoparticles wilt a shell consisting of nickel ferrite nanoparticles Strontium titanate (S1TIO3) nanoparticles were synthesized by sol-gel and hydeothermal method two-step provess, while sbell ff niekel ferrite (NiFe.O:) aanopanicles have been synthesized by co-precipitation route using sable ferie and niekel salts with sodiuey hydroxide asthe precipitating agent, Influenee of process parameters (pH, temperature, core/shell mass ratio) on structural eharacteristies of core-shell particles was examined, Obtained eore panicles, as well as core-shell structures were characterised ‘with differen technigues,

2

‘Comparison of titania nanoparticles synthesized by CVS and sol-gel methods

Stevan M, Ognjanovie', Ivan Stijepovie!, Ruzica Djenadic, Markus Winterer’, Vladimir V Srdié!

‘Department of Materials Engineering, Faculty of Technology, University of Novi Sad, Serbia “Nanoparticle Process Techuologs, Deparimen of Engineering Science and Center for Nanointegration Duisburg-Essen (CeNIDE}, University Duisburg Essen, Duisburg, Germany

In this work titanium dioxide powers were synthesized by chemical vapour syathesis (CVS) and sol gel method, Influenes of process parameters (system pressure and hotwvall temperature for (CVS and amount of aid and nature of the precursor for sol-gel method) on powder characteristics ‘was examined I was determined that by precisely controlling tune the posider eharseteristics, Characteristics of the powders synthesized by different miethods the parameters iis possible to fine

were then compared to reveal any inherent advantageskisadvantages of the method H was found tha the powders had very similar characteristics crystallinity, crystallite size, particle diamet ) and thatthe only majer difference was the degiee of agglomeration which was several orders ‘of magnitude larger for the sol-gel synthesized powders,

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tra

Microwave synthesis and characterization of Pt and PIRHSn electrocatalysts for ethanol oxidation

A Tripkovié!, V.M Jovanovié D Tripkovie® D Poleti®, 1 Rogan’, D Minié

ICTM, Deparament of Electrochemistry University of Belgrade, Belgrade,Serbia ’Materials Science Division Argonne National Laboratory, Argonne, It USA ‘Faculty of Technology anu Metallurgy, University of Belerate, Belgrade, Serbia “Faculty ef Physical Chemisits, University of Belerae, Belgrade, Serbia

‘Carbon supported PC and PIRhSn catalysts were synthesized by microwave-polyol method in cethylene glycol solution and led forthe ethanol electeo-onklaion reaction The catalysts "were characterizedin terms of stricture, moephology and composition by employing XRD, STM, EDX and TGA techniques Unsupported Pt and PORSA nanoparticles were eharacterized by scanning tunnelling micruseapy (STM) The mean particle size and distribution were acquired from 4 few randomly chosen areas in the STM images containing about 150 particles, STM analysis teonfiame that both catalysts have rather unifontn particles smaller then 2 am for bout eatalysts The UC and PÍRhSBÍC calalysts were ehanscterized by X-ray pawaler diffraction analysis While XRD analysis of the PUC eatalyst revealed the main characteristic peaks of face eentered cubic erystal siature (fc) of platinum, XRD patterns ofthe PIRDSMC catalyst ae all besadened and anno be clearly resolved Electrochaalyie activity of the catalysts ware investigated by: potentindynamie and chronoamperomettic tests, PIRBSWC calalyst is highly active for the ethanol oxidaion with the ‘onset potential shifted for ~ 150) mV to more negative values and with currents nearly 2 times higher in comparison to PvC catalyst, The stability of catalyst was studied in the ehronoamperomettic experiments The PIRHSMC catalyst is evidently less poisoned then PUC catalyst The small particle sizes and homogeneous size distributions of both catalysts should he ateibuted to the advantages of microwave assisted modified polyol prosess in ethylene glyeol solution:The increased activity of PIRKSn/C catalyst in comparison to PUC catalyst is most probably promoted hy bifunctional mechanism and the electron effect of alloyed metals

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Ninth Young Researchers Conference ~ Materials Seienee and Engines December 20-22 2010, Hall 2, SASA Kace Mihailova 35, Belgrade, Serbia

14

Nano-sized silane coatings as new materials in corrosion protection and adhesion promotion: the study of composition and electrochemi

properties

Zeljka Jovanovie!, Jelena Bajat', Ingrid Milosev’, Vesna Miskovié-Stankovié!

4, [Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia “odef Sian institute, Department nf Physical and Organic Chemistry, Ljubljana, Slovenia Silane films, having manometer-sized thicknesses, have oen studied as sew metalic surface pretreatments: silanes Became substitutes of ehoice for traditional chromate pretreatments, because Of theit eavironmencal compatibility Two types of silane Glms on aluminium were investigated ‘methaersloxypropyltrimelhoxysilane (MAPT) and vinyliethoxysilane (VTES) By comparison of the electrochemical characteristics, adhesion and morphology, VTES films are shown to he more cficient in corrosion protection Therefore, VTES is further investigated, by AES and XPS, and sed as a sublayer for epoxy coating on aluminium, It was shown that VTES film pretreatment of| aluminium surface significantly irmproved barrier properties and adhesion of epoxy coating

us

Carbon -based materials for supercapacitors

‘Yulia G Mateyshina, A $ Ulihin, N.F, Uvarov

Institute of Solid State Chemiestry and Mechanochemistry, Novosibirsk, Russia

power sources for use ia

Supercapacitors have tremendous potential as high-energy and hie

low weight systems In this work, we report resulls of the study of aew composite electrode materials hased on carbon nanofibers for application in asymmeirie supereapaeitors The carbon raterials were modified by eaiment, in acids (SOx, HNOs) Then nanopartsies of transition etal ovides, MO, (MeMn" Ni", Ti") were deposited on the eathon surfaces using methods of salts impregnation, miechanieal areatment and CVD The electrode composite materials wer investigated in a symmetrical two-electme cell using XRD SEM, an impedance spectroscopy ‘oltammetry The work s supported by grants GConteact Ne 16.740.11.0209

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6

Corrosion Behavior of mild steel in CO; atmosphere

Aleksandra Debeljkovie', Ivana Jevremovié!, Vesna Miskovié-Stankovic!, Srdjan ae

“Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia, “stout for Corrosion ad Multiphase Technology, Ohio University; Athens OH, USA In the aqueous phase, CO: forms earhonie avid which exhibits strong corrosive attack to mild steel, In this study cortesion behavior of mild steel was investigated in 3 wt, % NaCl with corrosion inhibitors (ethylamine and diethylamine) added at different concentrations: 03mM, (OSmM, [.onM, 3.3mM and 4.9m In order to determine the corrosion elfieieney of investigated inhibitors and the optimal concentration of inhibitors (a achieve the lowest corrosion of mild stel, the linear sweep volamety, electrochemical impedance spectroscopy and open circuit potential measusoments were used, The tesuls have confirmed that these inhibitors ean significantly improve ccorosion stability of mild steel

ww

Electrochemical behavior of nanostructured MnO2/C(Vulean) composite in aqueous electrolyte LiNOs

Milica Vujkovié, Nikola Cyjeti¢anin, Nemanja Gavrilov, Ivana Stojkovie, Slavko Mentus

Faculty of Physical Chemisiry, Belarate, Serbie

The electrolytic solutions of contemporary Li-ion halteries are made exclusively wit organic solvents, since anodic materials of these batters have potentials much more egative than the Poleatal of water reduction, snd orgunie leetolytes shay withstand the voltages 15 V characteristic for these hattries Sinee the discovery that some materials may electochemeally invereslate and deintercalate Lions in aqueous solutions, the number of works aimed to the sktempls to make agucous L-iom battery geows permanent Manganese oxide has heen largely stiied as electrode material in rechargeable lithium-ion batteries with organic electrolytes, In this work is electmhemical behavior as an anode materi in agucous cletrolyte solitons were examined fint time MaOy 8s & component of nanodispersed Mn0/C1Vuleas) composite was synthesized hydrothermally and investgsted in agueods sara LINO, soltion by both exec voltammetry and galvanostte charingldschatging (LiMN:O, 35 cathode material) techniques The obtaincd compesite shows relatively goed initial discharge capacity of 96.5 mig whieh alter 50” charging discharging cycles drops valve of STMAWS “hanks to its good eeveesibility and eyelabiity MaOC{Valeaa) composite could be &prosssing anodic material for aqueous Lion bateie+ Keywords: Agueaus lithium-ion hateris, Li

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Ninth Young Researchers Conferenoe ~ Materils Seience and Engineering December 20-22 2010, Hall 2, SASA Kace Mihailova 35, Belgrade, Serbia

vs

Current — voltage characteristics of carbon nanotube FETs Dusan B Vasié!, Petar M, Luki€†, Viadan M, Lukié

‘University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia ‘Nokia Siemens Nesworks Srbija do Belerade, Serbia

one of the most actual devices — eurbon nanotube field effect transistor (NT FET) is investigated At the beginning, the nanotube propesties are presented The main ‘contribution ofthis paper Developed model deseribes behavior of CNT FET in very good manner and, atthe same time, the is the new analytical model of CNT FET current ~ voltage characteristics model is relatively simple Using the developed model, simulations were pertoemed The results ‘obiained by using proposed model are in very good! agreement with already known and published

In tis pap

Inquiring the local elastic properties of commonly used pharmaceutical excipients by nanoindentation techniques

8 Sréie!

Biljana Govedarica’, 1, 1ié!, M Skarabot’, 1, Musey

“Faculty of Pharmacy, Department of Pharmaceutical Tectnologs, University Ljubljans, Slovenia “asinute Jocef Stefan, Depariment of Condensed Matter Physics, Ljbljana, Slovenia Mechanical properties of pharmaceutical solids are fundamental for research and development as well as production of solid dosage forms, and exeipients selection The main goal of eurrent research was the evaluation of the local elastic properties of commonly used pharmaceutical excipients with nanoindentation techaigues such as atomic force microscapy and nanoindn! ‘More profound interest of such study would he the correlation of mechanical properties atthe single particle level with the compaction behavior estimated atthe bulk level Such unigue combination oF high resolution imaging technique and compositional mapping in the manometer seale should provide relevant data abot mechanical properties and therefore could he used in prediction oF appropriate formulation for diet compression

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vio

Age hardening potential of an Al-4.6 wi.% Mg alloy with Cu addition

Ana Alil', Miljana Popovic”, Tamara Radeti¢”, Endre Romhanji’, Bore Jegdi¢*

‘Goku Institute, Belgrade, Serbia, ‘Dept of Metall Eng, Faculty of Technology and Metallurgy University of Belgrade, Belgrade, Serbia 1g behavior of an Al-46Mg-0-S4Cu fin WL") alloy was studied after (3) solution treatment for Th at 530°C, and (i) annealing at 280°C for 3h Both groups of the heat treated specimens underwent further thermo-mechanical processing: S% pre-deformation in tension + aniicial ageing at various temperatures: 140°, 160” and I8D°C for 30 mia, Effect of the thermo- mechanieal processing on the mierosteucture and mechanical properties was investigated by tensile testing and electrical esistivity measurements, Solutioaizing at 53°C resulted in higher resistivity level indicating that the most of solute atoms are retained in the solid solution, This provides great potential for precipitation hardening i ‘4 wide range of ageing temperatures On the other hand, it appears that most of the main alloying elemenls precipitated dusing the annealing at 280°C thus diminishing the ageing potential After ‘unter theemo-mechanical processing, the specimtens annealed at 280°C showed Si

songh level than onee soltionized at 530° Key wor: ALMp-Cu alloy, ageing, precipitation haruening, mechanical propenies

itieantly lower vi

Properties of electrochemically deposited Ni,Fe,W,alloy powder

Nataa Cirovie!, Lenka Ri

Miroslav Spasojevis i¢-Zelenovie*, Nebojša Mitrovie”, Aleksa Marigié!

"Valjaonii bakra Sevnjno A.D, Sevojno, Serbia, “Faculty of Agronomy, University of Kragujevac Cacak, Serbia, Technical Faculty Cadak, University of Kragujevac, Cava, Serbia

Nanostrotral powder Ninoy was cletoshe mally depose fom ammoniae state bath

at room temperature by using different curvent densities higher than 300 mA‘em’ X-ray diffraction

nalysis has shown thatthe obiained powder contain crystal phase withthe Fi-3m symmetry of FCC solid solotion of Ni, Fe and W, Pals i the she of cauliflower witha large number of potes were obgerved by TEM Depending on crtem densities and chemical composition of bath fine of nanocrystals was in the range fom wnt 7a “Temperature dependence of the magnet susceputiity of powder was investigated Py the modified Faratay method inthe temperature region from room temperature upto 600 °C It has been tablished tht the Carie temperature of as-pepared powder is about 800 °C Afr fist faving vp to 400 °C magnet permed ine

eases for ahout 12 % After sevond heating up 10 600 °C magnetic permeability decreases for about 5 4, but Corie temperatute inereases 10 about

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wi

Synthesis and dielectric properties of calci based cera

m copper titanate (CCTO)

Zoran Stojanovie, Ljiljana Veselinovie, Smilja Markovié, Dragan Uskokovié Instinute of Technical Sciences ofthe Serbian Academy of Sciences and Art, Belgrade, Serbia

‘The pemeskite CaCusTisO12 (CCTO) powders with various oxide phase impurities were synthesized via citic gel combustion method Influence of citric acid amount used for gel preparation was examined in order to lower CCTO formation temperature to oblain powders with less impurities and hetter miero structural characteristics, Prepared powders were pressed into pellets and sintered at 1000 °C, Effects nf oxide component impurities, such ws CuO, rutile, anatase, Ca¥iOs were examined on sintering behavior and dielectric propenies of ceramics Phase composition of powders and sintered spocimens were determined hy XRD, microstructure powders and sintered bodies were observed by SEM, and dielettic constants of sintered ceramics were ‘measured by Wayne Kerr B24 universal bridge:

M2 'Synthesis, stabilil

ranges, structural characteristics and electrical conductivity of BI(CR,FE)VOX solid solutions Eugene V Velichko!, E.S Buyanova', M.V Morozova'’, S.A Petrova”

“Ural State University, Vekarerinburg, Russia

“Insite of Metalluray of the Ural division of RAS, Yekaterinburg, Russia

Samples of Cr", Fel"substituted bismuth vanadate, formulated a8 BV sFeusCruO irs, ‘ex20.70, were synthesized by convenient solid-state and citrate-nitrate methods, The strutue Was investigated using X-ray powder dilfration, differential thermal analysis and high-temperature X ray powder diffraetion The solid solutions with (L2y-f07 erystallize in tetragonal space group ‘immo, Electrical conductivity of BICRFEVOX was studied by means of impedance spectroscopy 44s 2 function of temperature and composition Above 873 K the highest conductivity is characteristic for x=0.2 solid solution Samples synthesized via Tiguid precursars display higher {otal conductivity than those obtained by solid-state teehaigue

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3

Crystal growth of solvothermally obtained LiFePO,, in dependence of synthesis conditions

Maja Kuzmanovié', Dragana Jugovié’, Miodrag Mitri

Nikola Cyjeti¢anin’, Sreéo Skapin', Dragan Uskokovi

“Insti of Techical Sciences of the SASA, Serbia, "The Vinee Institute, Comlensed Mauer Physics Laboratory, Serbia, “Faculty of Physical Chemistry, University of Belgrade Serbia, "Joe Sten" Institue, Ljubljana, Slovenia

Olivine type LiFePO, is» promising cathode material for the use in lthivay ion hatteries, especially in the hatterics for hybrid electric vehicles oF pute electric vehicles In this work, LiPePO, was synthesized hy solvathermal method at IS0°C, for 1S hours, The a-hexanal was used as a solvent with cyclohexane and Triton X-100 as co-solvent an surfactant, respectively The powders were annealed a elevated temperatures with ation of oxalic avid as carbon souree, The tcanditions of salvothermal synthesis and the presence of the oxalic acid played important role in the crystal growth mechanism, Powders were characterized hy X-ray diffraction, seanning electron microscopy and galvanostatc eharge-discharge eyeing

ws

‘The synthesis of tungsten trioxide gel by dissolution of tungsten in hydrogen peroxide and its transformations during the heat treatment in oxidation and reduction atmospheres

Radovan Georgijevié, Slavko Mentus

University of Belgrade, Faculty of Physical Chemistry, Belgrade, Serbia

Tungsten trioxide has @ wide speetum of applications in optical and eleetrochromic devices, 1285 sensors, solar energy conversion, ete, amd may be reduced to metallic slate by heating in hydrogen atmosphere, ‘which offers a new Field of application, A suitable precursor for nanodispersed one and oxide films of nanometer thickness may he obtained by dissolving metalic tungsten in hydrogen peroxide, In this work sueh a solution was obtained, and dried to a state of transparent ge, by heating in air at 60°C The gel was evidenced to be amorphous by means of X- ray diffractometry By thermogravimetry it was determined that the malar ratio of H:O against WOs in the gel was 1.5 1, and that om heating it at arate 15°C min water removal oveurs up to 400" ‘The X-ray diflrastometty evidenced that the obtained product presents monoclinic WOs, Bot of these oxide forms were heated ina TGA device in reduction hydrogen atmosphere, and it was

‘observed thatthe reduction of both amorphous and erystaline sample proceeded al almost equal emperatures, The morphology and granulation of obtained metallic powders were studied by means of seanning electron microscope

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1S

lca-silica and siliea-titania combined coatings

Adam Detich, Dánil Balzs, Bmơke Volentru, Zolún Hớrvưlgyi

"Bulapewt Uiterit g[ Tọchnolagy ud Econotnics, Department ƒ Phssical Chemisty nnd Materinls Science, Laboratars for Physical Chemistry, Buopest, Hungary Structural, morphological and mechanical investigations of thin silica and titania coatings will, be reported in our talk, The complex (silici-silica and silice-titania) films were prepared by ‘combining the Langmuir-Blodgett (LB) technique with sol-gel method (SG) Two types of eo were developed nanopasticulate LB layer couted by sol-gel layer and vice-versa

Structural information was obtained by scanning electron microseapy, by UV-Vis spectroseapy and by seanning angle reflectomeury methods, while morphology was studied by atomic force miceoseupy We vill show that the combination of LE and SG methods gives a new entry to the Fabrication of advanced coatings Ackaowhedgements: The authors thank 10 Nothert Nagy and Esater Pukip for the SEM and APM images aad to Ereschet Hild for her help in the optical model investigations The financial support of the Hungarian Seiemttie Rescareh Fund (OTKA CK 78629) and BIOSPONA is _ratefully acknowledged, 6

Control of pulse plasma trans

ion state for enhanced processing efficiency

Ivan Popovié, Miodrag Zlatanovié, Djordje Klisié

Schoo! of Electrical Engineering, University of Belerade, Belgrade, Serbia

“The dynamies of the discharge in pulse plasma systems has a significant influence on the homogeneity of coatings As opposite © PACVD systems where transition ofthe negative glow es be improved sith the addition of positive pulkes, in reactive sputtering, high-vollage negative pulses in partially decayed plasima increase diseharge urea tsunsition tothe sationary state, This agreaily inereases power delivered to the plasma during the negative pulse, The analysis of voltage find current waveforms dosing the glow discharge ‘ignition show possibility for controlled {generation of cathode high-voltage pulses Contcol is performed with careful tuning of process parameters andl asa result inereasel plasma processing eicieney can be obtained,

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17

Microstructure evolution and sintering kinetics of ZnO

Darko Kosanovié!, Suzana Filipovie', Nina Obradovie!, Vladimir Pavlovié’, Moméilo M Ristié

“insutute of Technical selences-SASA, Belgrade, Serbia “Serbian academy of sciences and arts, Belgrade, Serbia

‘The aim of this paper was to analyse the sintering kineties and microstructure evolution of ZAO, Povider was isothermally sintered (15, 30, 60, 90 and 120 minutes) ithe temperature range From ‘801 © 1200°C The values of Lene! parameter were used to analyze both densification and mass transport processes, Seanning electron miieroseapy was performed in onler to determine the microstructure evolution and dependence of everige grain size on temperature and time of sintering ‘These results will enable development of new phenomenological equations that can he applied ia analyses of sintering kineties Keywords: Zn0, Sintering, Kinetics

Ws

Pulse plasma processing as a candidate technique for surface treatment of wind turbine components Djordie Klisié, Miodrag Zlatanovie, Ivan Popovié

Faculty of Electrical Engineering, Belgrade, Serbia

Modern wind turbines construction is characterized hy constantly inereasing electrical power, “The mandatory request of constant Frequency of produced electricity output is contradictory to the variable wind turbine rotation frequency The matching of wind trhine and electrical generator rotation frequencies ean be achieved by a relatively complicated transmission gear box system or by power electronic system which eliminates matching gear box The gear components ust he resistant to different types of wear and to dynamic and static load, as ell as 10 be corrosion resistant especially in off share wind patks and to have acceptable noise emission, Unipolar pulse plasma was demonstrated to be efficient in diffusion and deposition mode of operation which combination gives the opportunity to meet the requirements of materials for wind turhine gears manufacturing, as wel as For lage size component treatment

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mi

‘The influence of powder characteristics on two-step

hydroxyapatite ntering behavior of

Miodrag Lukié’, Zoran Stojanovié', Ljiljana Veselinovie', S Ines Bracko", Smilja Markovie', Dragan Uskokovié!

“Institute of Technical Sctences of the Serbian Academy of Seiences and Arts, Belgrade, S Jozef Stefan Instsute, Liubliana, Slovenia

Fabrication of full dense ceramic materials on the basis of hydroxyapatite (HAp) and biphasic ealeium phosphate (BCP) with controllable microstructural amd compositional characteristies attracts considerable effons Various synthesis and sintering methods were applied in onder 10 fchieve desirable material properties In this siudy different nanopowders were produced and processed via tworstep sintering (TSS) approach, Characterization of synthesized nanopowders were done by XRD BET, FE-SEM, TEM and thermal analysis methods, whike mienostructura and chemical characterizations of sintered samples were performed through PL-SEM and XRD analysis, A possibility for obtaining full dense ceramies with suppressed grain grosth is discussed ‘on the hasis of inlereat nanopowders characteisties Certain altention would be paid on thermal behavior of Casdficient Hp systems

v2

Green synthesis of PGA-capped silver nanoparticles and their characterization

Igor Savanovic!, Magdalena Stevanovie', Sreéo Skapin’,

M Markovié’, Dragan Uskokovié'

“tnsivate of Technical Sciences ofthe Serbian Academy of Soiences and Arts, Belgrade, Serbia eter Siefan Insts, Ljubtiano, Sloventa, Ving hstiue of Nuclear Sciences, Belge, Serbia

Owing t their persistent antiacterial propenies, Ag nanoparticles are inereasingly wsed in clinical practice and investigated in recent laboratory reseaech, Although there are a number of sncthads for the syathesis of Ag nanoparticles, recent research irene comply with the requirements ff Non-toxie Environmental Chemistry i this study, the synthesis of silver nanoparticles was based on the principles of green istry In onder to improve their antibacterial properties and biocompatibility Ag nsnoparticies ean be enated with various hiacompatible and biodegradable polymers that ean ensure their better interaction with eells and more favourable size distribution, Poly(a, y-glutamic acid) is one of the polymers that have the required properties; it ako serves as particle stahilizer, The synthesis of Ag ‘nanoparticles was periormed by & maditied chemical reduction method with glucose as the reducing agent The samples were characterized by UV? Vis specttoscopy FESEM and Zola potential

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m3

Nucleation of biomimetic hydroxyapatite BoZana Colovie, Vukoman Jokanovié

Institute of Nuclear Sciences “Vine”, Laboratory for Radiation Chemistry and Physics, Belgrade, Serbia Formation of biomimetic calcium hydroxyupalite on the surfuee of different substrates (xatious polymer thin films and siliea thin films) was investigated in this study Supersaturated SBP and {BF combined with EMEM or FCS swere used as bioactive liquid environment After aging in SBE Tor various periods of tine, samples wete investigated by FTIR-ATR phases, while morphology of self assembled hydroxyapatite was investigated by SEM and AFM and XRD to analyze obtained Investigations of mass changes of the samples showed thatthe rate of CHA self nucleation depends fom the Lype ol substeite and medium as well asthe ag

ms

Structural characterization of synthetic and biological carbonated hydroxyapatite

Liiljana Veselinovié!, Miodrag Luki¢', Ljiljana Karanovic'

‘Nenad Ignjatovie', Smilja Markovié!, Dragan Uskokovie!

“insite of Tectnica Sciences ofthe Serbian Academy of Sciences and Ari, Belgrade Serbia, “Laboratory for Crystallography Facey of Mining and Geology, University of Belerade Belgrade, Serbia

Wis well known that inorgumic part of bones and testh aze impure form of hydroxyapatite, (HAP) CayoPO3K4OH) >, During the past few decades, great efforts have been invested to develop synthetic equivalent of natural apatite, The major difference of natural bioapatites from hydroxyapaties is inthe presence of eerain content of co}> ions inthe structure The presence of the Coy ions in the HAp sleueture influenees the weactivity and stability Therefore, the exact content of co} fons as well us their aan

The aim of our work is comparative analysis of the biological eathonated hydroxyapatite extracted fom human alveolar bone and synthesized eatbonated hydeosyapatite (BCHAp) ‘Slauclural and mictostruclural parumcters were XRPD data, and with transmission eleetzon microscopy (TEM) determined through Rietveld refinement of recorded

‘Microstructure analysis showed anisotropic X-ray line broadening due to the small erystallite size (about H) nm) as well 3s anisotropic growth of crystallites The Raman spectroscopy confirmel the apatite structure and erystalinty

1 in Ue structure is very importa

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ms

Evaluation of alginate hydrogels in a biomimetic bioreactor applying dynamic compression

Jovana Zvi Jasmina Stojkovska, Bojana Obradovié

Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia

Alginate hydrogels indifferent forms (discs, microbeads), different concentrations (1.5, 1.9 and 26 ww) an different chemical compositions (mannuronie to gularonie (MiG) residue ratios of 6.49 aad 1.6) were (ested in a biomimetic bioreactor at 10 5 sieain under twa regimes: af & loading rate of 337.5 ymis and at sequemial increments of 50 pm displacement every 30min Higher content of G resides and higher aiginave concentrations yiekled stronger gels while packed heds of smaller microbeads eshibited highest compression modult due to interstitial ater, Results of this stualy are relevant for in vii biomedical applications in which implants are submitted to significant biomechanical stresses

m6

Evaluation of novel alginate nanocomposites for biomedical applications

Jasmina Stojkovska, Zeljka Jovanovie, Danijela Kosté, Jovana Zvicer, Isana Jevremovig, Maja Vuka¥inovie-Sekulic, Vesna Miskovie Stankovic, Bojana Obradovi

Inthis study, we have investigated biomechanical properties, amibacterial and eytoroxie effects fof novel alginate nanocomposites for biomedical applications A bioreactor with dynamic ‘compression and medium petfasion was utilized to evaluate hiomechamieal properties oF anocomposites under i vivo-ike eonditions Packed beds of alginate microbeads with nanoparticles exhibited higher compression medulus (for ~35 1 than the contmot mieroheads In addition, the presence of Ag nanoparticles induced antibacterial activity against Stophifococens ‘aureus, 28 well as strong cytotoxic effects on bovine ealf hondracytes Results of this study show ‘of novel alginate nanocomposites for biomedical applications as soft tissue implants and

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m7

‘The influence of different polymerization mechanisms on thermal properties of poly(L-lnctide)

!, Nataga D Bozié!, Jaroslava K Budinski-Simendie' Radmila Z, Radigevie’, Ljubisa B, Nikolié’, Ivan S, Risti¢!

“University of Novi Sad, Faculty of Technology Nov! Sad Serbia “University of Nis, Faculty of Technolags, Leskovac, Serbia

‘The aim of this work was to develop optimal polymerization conditions of L-lactide us

‘methods which involved different polymerization mechanisms, Bulk polymerization was performed with the presence of SHOet)s, a initiator, by cooedination-insertion mechanism The cationic polymerization, performed in solution with tifluoromethanesulfonic acid, as initiator The effect of used initiator, eaetion temperature and time of polymerization of L-lactile was investigated, The humber-average molecular weight (M,) and polydispersity Q of the obtained PLLA samples were determined by GPC measurements According to GPC resulls, polymer obtained in solution had the narrower molar mass distribution ‘Thermal properties of synthesized polymers were investigated using thermogravimetry and differential scanning calorimetry The presence of -OH and = (€(Q)080,CF) end-groups at obtained polymers by eationie mechanism, allows efficient end-to-end eyelization which expliins its higher thermal stability compared sith linear poly(L-letide), ‘obtained by insertation mechanism

1s Investigation of electrochemically synthesized Ag/PVP nanocompo Biomimetic approach

Ivana Jevremovig, Zeljka Jovanovié, Jasmina Stojkovska, Bojana Obradovig, Maja VukaSinovie-Sekulié, Aleksandra Perié-Grujic, Mirjana Ristié,

Vesna Migkovie-Stankovié

Faculty of Technology and Metallurgy University of Belgrade, Belgrade, Serbia

Silverfpoly(W-vingl-2-pyrnolidone) (Ag/PYP) nanocomposites were obtained by electrochemical reduction of Ag" ions in polymer matrix, ersslinked by y-iradiation Ag/PVP nanocomposites were characterized by UV-visible spectroscopy and tested in the bioreactor with “mechanical stimulation foe evahsation of biomechanical properties, Silver release was investigated by atomic absomption spectroscopy and agar diffusion method was applied for detection of antimiorobial aetivty Results of silver release confirmed the presence of Ag nanoparticles even alier 4 weeks Tests performed in the biogeaetor have shown that mechanical properties of material are improved by silver nanoparticles, The antibacterial setivity of silver nanoparticles is confirmed,

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m9 a

josan laminated collagen film properties Nevena Krkié, Vera Lazi¢, Jasna Gvozdenovie

Faculty of Technology, Novi Sad, Serbia

‘The objective of this study was to determin physical, mechanical and basrier properties of chitosis laminated collagen film, Laminatioa of callagen with chitosan ilm increased collagen film thickness Laminated film was more soluble in water then collagen film but lamination did not affect swelling propetty of collagen film significantly As to film color, lamination with ehigosan reduced collagen film lightness (L) and yellowness (4) but inereased film zedaess (42) Chitosan laminated collagen film did not show improved mechanical properties, but did show greatly improved oxigen barter properties,

wi Antibacterial activity of hydroxyapatite/silver nanocomposite

0 D Skapin’

Marija Vukomanovie', U Repnik`,T Zavatnik”, S

Dragan Uskokovi¢’, Danilo Suvorov'

“Department of Advanced Materials, Joe Stefan lsu, Ljubljana, Slovenia, “esate of “ences SASA, Belgrade, Serbia, ‘Department of Biochemistry and Maleculae Biology “oie Stefan Intute, Lubljana, Slovenia

Tecinical§

Hydroxyapatite containing silver nanopanicles (HAp/Ag) was synthesized by homogenco sonochemical metod, Morphology of obtained panicles was formed of micrometer-sized rod-like HAp with nanosized silver sphete-like particles attached to dheit surface So obtained material was tested for interuction with bacteria For that purpose composites with three different contents of silver were prepared and their interactions with two different types of bacteria were studied Excherichia coli was used as a representative of Gram negative while Stophylococets aureus was applied as a representative of Gram positive bacteria In the case of E coli wider inhibition zone without presence of bacteria and with a layer of inactive baeteria near the surface of material Was ‘obtained In this ease obtained antibacterial effeet was not concentration dependant Inthe ease of ‘aureus, inhibition zone was naerower with the presence of modified hacteris in inhibition zone

‘Onvained antibacterial response pronounced dependence on concentration of silver within site According to resulls achieved with this investigation we concluded thác HApAs composite is effective against hoch, Gram positive and Gram negative bacteria and shows stronge activity aguinstE, cat

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Ninth Young Researchers Conferenee ~ Materials Seience and Engineering December 20-22, 2010, Hall 2, SASA, Kacz Mihailova 38, Belgrade, Serbia

IV2

Protective effects of oral applied Fullerenol Cạ(OH); nano particles, in rats after a single dose of DOX

vie!, Aleksandar Djordjevie!,Branka Seljenovie

‘Saia Vukmirovié’, Jan Sudji’, Rade Injac’

"University of Novi Sad, Faculty of seience, Departmen of chemistry, biochemistry and environmental protection, Novi Sad, Serbia, “University of Novi Sad Faculty of Medicine Deparment of Pharmacy, Novi Sad, Serbia, ‘Faculty of Pharmacy, The Chair of Pharmaceutical Biology University of Ljublion, Ljubljona, Slovenia

Polyhydroxylated, water soluble, fullerenol CafOH)os nano particles (ENP) fx vitro and de vivo models, showed an expressive biological aetivity, The seope of this experiment was to javestigate the potential protective effects of oral applied FNP (in dose of 1D, 144 and 21.2 mgfka) in ras alter asigle dose (8 mgrkg (i.p.) of doxorubicin (DOX:) After the last drug administration, the rats were sacrificed and the blood and tissues were taken for analysis, Biochemical and pathological results confirmed that, at all examined doses, FNP exhibits a protective influence against toxicity induced by BOX

va

Distribution of nanoparticles of fullerenol in human serum in presence of doxorubicin

Danica Radmanovac', Aleksandar Djordjevic! Alenka Mertel,

‘Mariana Seke’, Rade Injac’, Ivana Iéevié!

"University of Novi Sad, Faculty of Science, Department of Chemistry, Biochemistry and Environmental Protection, Novi Sad, Serbia, ‘Institut Jozef Stefan, Ljubljana, Slovenija, ‘University of Belgrade, Faculty of Biology, Beogred, Serbia, “Faculty of Pharmacy; The Chair of

Pharmaceutical Biology, University of Liubliano, Liubliana, Siovenia

‘The aim ofthis experiment was to measure the changes in sizeof panicles in aqueous solution of fullerenol CaKOH)24 in presence of comenil eitostatic doxorubicin in human serum This work \was performed by measuring dimensions of particles by: dynamic Tight seatering, zeta potenti, scanning electron microscope and transmission electron microscopy Results show that changes i the concentration of fullerenol have no significant effect on the distribution of particles in the serum, which could mean that there is no infraction with serum proteins Results also show the Stability of fullerenoldoxorubicin-nanopanicle of diferent molar ratio, Pullesenol nano particles ia cert molar ratio with doxorubicin form aano-aggregates in a length of 100-2000 nm

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vid

Alginate microbeads as cell supports in a bio for cartilage tissue enginceri

Danijela Kostig, Jasmina Stojkovska, Bojana Obradovié

In this stady, we have investigated tao Iypes of alginate in Uke form of micmbeads for immobilization and ealtvation of bovine ealf chondrocytes ina biomimetic hioreactor, Microbeads (1.5% wh alginate, 33 10" eellsiml) were cultivated under dynamic compression applied ia physiological ranges (1 h-on/t h off, frequeney 0.12 and (1.56 Hz, 10 % strain) for up to 28 days During the cutivation, cells proliferated and synthesized extracellular mateix so shat after 4 weeks, ‘compression moduli of packed beds of microbeads exceeded the initial values and large groups of | bonded micmbeads were observed, which demonstrated potentials of the investigated system for cartilage tissue engineering

IV

‘The characterization of HAP/Lig coatings containing different lignin concentrations and their influence on the cytotoxicity

Sanja Erakovie!, Djordje Veljovie!, Papa N Diout®, Tagjana Stevanovi

Miodrag Mitrié’, Ivana Matic’, Zorica Juranie!, Vesna Migkovié-Stankovi “Faculty of Tecinwology and Metallurgy, University of Belgrade, Belgrade, Serbia, ‘Département des Sciences du Bois et de la Foret, Université Laval, Québec, Canada, *Vinda Insite of Nuclear Sciences, University of Belgrade, Belgrade, Serbia, ‘Institate for Oncology and Radiology of

Serbia, Belgrade, Serbia

Synthetic hydroxyapatite (HAP, Cay(PO(OH)» has ability to form strong interfueial bonds ‘with bone tissue and to improve iis growth, The development of electrodeposited HAPipolymer coatings is currently ing explored, The purpose of this Work was to investigate the effet of lignin (Lig) concentration on moepholagy phase composition and thermal behavior of HAPILig coatings ‘Therefore, XRD XPS and TGA were used MTT test has heen eonducted inorder to determine the eytotonicily of coatings It was observed thal the inerease in lignin concentration causes beter protection of the HAD late during sintering The oplimal lignin concentration was found to be | wi

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vis

n vitro evaluation of antimicrobial activity of nano composite biomaterials based on hydroxyapatite

Zotica Ajdukovie!, Miligevie!, Milica B Petrovie!, Nadiea Djordjevi

Miadenovié- Anti€ `, B Koeié`, Nenad lgnjatovié", Dragan Uskokovie’, Vojin Savi€"

‘Feat g[ Melicine, Nữ, Cliic aƒSkomuluey, apartuent ˆFaealiyaf.Madicine The University of Pristina located in Koxovska Mitrovica, Clini of ƒ Prosthodontics, Nis, Serbia Siomaiolosy Department of Prosthodontics, Ni Serbia, ‘Dstt of Public Heath, Center for Microbiotogy, Nis Serbia, “Insite of Fechnical Sciences of the Serbian Academy of Sciences and Ars, Belgrade, Serbia, "Faculty of Medicine, NBS nite of Biomedical Research, Nis, Sebia

Antimicrobial materials based on hydroxyapatite are potentially attractive in a wide variety of ‘medical and stomtologieal applications, The objective of this paper ist examine antimierohie activity of cohalt-substiuted calcium hydrosyapatitemanopowders and biphased calsium ‘phosphate poli-lactide-co-plicolide The antimicrobial effects ofthese substances (pawalers) against -8eo pathogen bacterial strains: Escherichia 25923) were tested by dise dilfusion method and quantitative antimrobial testi liguid medium It coli [ATCC 25922) and Staphylococcus aureus (ATCC ‘was noted that the ishibition zone of the bacterial cells Š aureus around the sample of the Ca/Co- HAp, was a lot bigger compared to the iahibition zone of bacterial sells E, coli around the sample of the meationed biomaterial which means chat this material has bigger wntimicrobie avtivity on 3) ‘aureus, in relation to E coli Quantitative antimicrobial test in liguid mediums demonstrate that cobalt-substiuted caleiusn Aydroxyapatite samples show viable eelis reduction of both tested microorganisms It may be concluded that nanoparticles of gnbalt-substituted calcium hhydoxyapatite mano-powders has a satisactory antimierobic aetivity according tothe tested bacteria xin

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wit

aluation compensation of an osteoporotic rat bone with Ca/Co-HAp nanoparticles

Zorica Ajdukovie’, Milica B Petrovie', Jelena Milieevi€', Nadiea Djordjevi Nenad Iunjatovie', Dragan Uskokovié’, Vojin Saviế"

‘Paculy of Medicine, Clini of Stomatology, Depatment of Prosthodontics, NI, Serbia, *Raculy of Medicine, University of Pisin located in Kosovsha Mitnovien, Cline of Stomattoys, Department of Prosthodontes, Ni, Serbia, Instat of Technical Seiences of the Serbian Academy of Seiences dnd Arts, Belgrade Serbia, ‘Faculty of Medicine, Nis, laste of Biomedical Research, M8, Serbia

This study examined the role of Ca/ Co-HAp nanoparticles on time distance in regeneration of ‘osteoporotic alveolar bone in rats by biochemical bloos! markers analysis (ALP, Ca, Mg, P) and through histochemical analysis The research wax carried out on feriake Westar rats, a

weeks The obtained results for the bioehemieal blood markers showed statistically signifi

Histological analysis eveated high level eparatary sills ofthe biocomposite implanted in the bone fect us varly as ia the mineralized tissues It can he concluded thal Ca/Co-HAp stimulates the regeneration of osteoporotic alveolar hone in tested animals as confirmed by the increased levels of biochemical blood markers snd through histochemieal analysis, Therefore, it ean be eoneluded that CalCo-HAp nanocomposite should he choise material in the osteoconstauclive processes in the future

vs

Determination of clindamycin in pig plasma after implantation of poly(D,L« lactide-co-glycolide)/hydroxyapatite/clindamycin core-shell nanosphere by chromatogeaphy-tandem mass spectrometry

Maria Vukomanovi€f, Nenad Ignjatovie*, Dragan Uskokovie*

Unsitce of Public Health of Belgrade, Belgrade, Serbia, Faculty of Agriculture, Novi Sad, Serbia, "Medical Faculty, Novi Sad, Serbia, Institute of Technical Seiences of the Serbian Academy of Sciences an Arts, Belgrade, Serbia

Clindamyein was determined in pig plasma by guid chromatography/tandem mass spectrometry (LC-MS/MS) The mulliple action monitoring (MMU mode of precursor-product jon tcansitions for clindamycin (mj2=4211/126.1) and the internal standard, coffeine (nve=102/125) was used, The samples were prepared by two methods: 8.1% formic acid in ‘methanol and 1.5% triehloaeetie acid The recovery for the to preparation methods at 0.05 g/ml 5) was found to be forthe first 104.36 and for the second method 106.5%, with repeatability RSD 1.1% and RSD 4.34%, respectively The reslls of the comparison of die wo different ‘reparation methods of samples demonstrated that ought methods were satisfactory

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va

Effect of caseinphosphopeptide-amorphous calcium phosphate and fluoride on enamel remineralisation

‘Tamara Perié’, Dejan Markovié!, Radmila Jangié Heineman Vesna Radojevie’

Bojan Petrovie®

Faculty of Denssiry, University of Belgrade, Belgrade, *Facuby of Technology and Metallurgy University ef Belgrade, Belerale, Demnsiry Clinic of Vojodina, University of Nost Sod, Novi Sa Serbia

“The aim was to evaluate surface characteristic of ineipicnt enamel carious lesion after treatment ‘with easeinphosphopeptige-amorphous caleium phosphate and fluoride Fony enamel slabs were used, Following Formation of the anifieial earious lesion, they were divided into four groups (cascinphosphopeptide-amorphous calcium phosphate caseinphosphopeplide-amorphous calcium fluoride phosphate, sodium fluoride, and contro!) and submitted 10 a chemical caries model Scanning elecion mictophotographs were taken and subsequently analysed sith image analysis ola determine eí surface characteristies, AMhough treament with ceaseinphosphopeptide-amtorphous ealeiym phosphate and fluoride result in different topography of ‘enamel, al solutions exhibit romineralisation potential

NO

Mineral trioxide aggregate as an alternative material in endodontic treatment for tecth with incomplete root development

Bojan Petrovie!, Dejan Markovic®, Tamara Perié?, Vukoman Jokanovie`

‘Deparrment of Peedictric and Prevemive Dentistry, Dentistry Clini of Vojvodina, Faculy af Medlcine Universiy of Nov Sad, Serbia, ‘Deparment of Paediatric and Preventive Dents Faculty of Dentsry, Universi of Belgrade, Serbia, Laboratory for Radiation Chemisty and

Physics dnsiate af Nuclear Sciences Vina, Belgrade Serbia

Aim of this research was to deseribe the mang tanenl teeth using one-visit endodontic trealment with mineral trioxide aggregate (MTA), {In 10 immature tooth with persistent apical periodontitis conventional endodontie protocol with calcium-hydroxide was changed, and the apics! portion was filled with MTA and the test of the canal was filled with « canal sealer and gutta-percha, Control examinations were performed six months after teatniemt completion and afterward yearly For follow-up, 8 teeth shosted resolution ‘of periapical radilueeneies, whereas clinical symptoms were absent in all patients, MTA could be resoramcnda For immature tell in complex endodontic eaves

ment of apical periodontitis ia immatuee

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vil

Redox-sen:

ive poly(amino acid) based gels Benjamin S Gyarmati, Andras Sziligy’

Deparment of Physical Chemistry and Materials Science, Budapest University of Technology and Economies, Laboratory of Sofi Maners Budapest, Hungary Smar polymer gels ure designed 1o change theit properties to eatery applied triggers and they have promising biomedical applications (eg dug delivery) if they fulfil the requinements of ‘biodegradability and/or bigcompatbility We have prepared polyamine acid) hased gels which have well-defined ph and redox sensitivity Two different systems were investigated first one shows reversible sol-gel transition 10 the changes in redox environment which was proven by gelation time and theologies! measurements, The olhet one’s swelling degree and elastic modulus ean he controlled by redox

potential of environment ‘Both polymers and gels weve characterized hy differen analytical methods as well

ve

Effects of composition and crosslinker content on swelling and mechanical properties of poly(2-hydroxyethyl acrylate/itaconic acid) hydrogels

Jovana S Jovaševié', Maja M, Miéic®, Edin H, Suljovrujie®, Simonida Lj, Tomié!

"Faculty of Techoloes- ad Mesollurgs, Belgrade, Serbia Vinca Insitute of Nuclear Sciences, Belgrade, Serbia

In this work, novel hydrogels based on 2-ydroxyethyl acrylate and itaconie acid (PUBIENA)) swore prepared by ts copalymerization, varying itaconic acid and crosslinker (eihylene glyco! dimethaerylate (EGDMA)) eastent, Effets of iaconie aeid and exosstinker content ‘on atechanieal and swelling properties of PYMEAVIA) copolymeric hydeogels were investigate, Swelling stulies were solution of pH 7.40, at 37 °C, Mechanical properties were determined by: dynamie-mechanical analysis (DMA), Results indieate that PCHEAIA) hydrogels" propemies are dependent on 1A and conducted for three series of PHEAMIA) copolymeric hydrogels i buy

EGDMA content Equilibrium degree of swelling (q.) of hydioget samples increases as 1A content inereases, Higher EGDMA content eonteibutes to decreased g, of byikogel neworks, Analyzi ‘mechanical properties expressed as shear modulus st was noticed that EGDMA higher content euses inorease of shear modulus value, Hydrogels containing higher A coment showed weaker mechanieal performances “This work has been supported by the Minisity for Seience and Technol

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v3

Synthesis of nanostructured polyaniline in the presence of vanillic acid

Aleksandra M Janofevie!, Gordana N Cirié-Marjanovié

‘Faculty of Pharmac, Belgrude, Serbia, "Faculty of Physical Chemistry, Belgrate, Serbia Self-assembled polyaniline nanorods were synthesized by the oxidation of aniline with ammoniam perosyulsulfae in an aqueous solution of vanilie eid, using the template PH method, The effects of the inital mote ratio of vanilie eid to aniline (staring pH) and the reaction time on the yield of polymerization, morphology molecular structure and conductivity of synthesized polymer were studied The morphological change of polymetization products due 10 the change of regetion conditions, trom the nanorods (possibly the matotuhes), with a diameter of 70 ~ 380 fim and a length of 03-10 jim, to the nanorads co-existing with the submiesaspheres, was revealed by scanning elvctron microscopy Molecular stuctare of v

investigated by FTIR and Raman spectroscopies

thesized polyaniline vas

Ví

Microstructure and crystallinity of oriented polyolefins

‘Tibana Mudrini¢!, Dejan Miligevie’, A, Leskovat Miodrag Mitrié?, Edin Suljovruji

_"Facaty of Physical Chemistry, University of lelgrade, Belgrade, Serb Ving Iistinteof Nuclear

Sciences, University of Belerae, Belgrade, Serbia

‘The influence of orientation on polyolefins was studied in accordance with Petertin’s molecular ‘model of drawing Isotactie polypropylene and low density linear low density and high density polyethylenes were oriented via solid-state stitching at an clevated temperstare Orientation induced changes in the mioephology were analyzed by optical and scanning electzon microscopy Ditferemial scanning calorimetty and wide-angle X-ray diffraction were used to determine changes in the erystallinity where a to-stage evolution was revealed The first stage is characterized by & Signicant inerease in erystallinty while the following saturation oseurs with 9 further das’ ratio increase atthe second one The value ofthe eitcal dra ratio, which separates these (0 st coresponds fo the transformation from the initial @ the influenced by the structural peculiarities of each polyolefin,

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Ninth Young Researchers Conference ~ Materials Seienee and Engines

vis

acid) /pectin blends as membrane materials Aleksandra NeSié

‘The aimm of this Study isthe application of polyGitaconie acid) (PIA) and peetin complexes that can be used for Direct Methanol Fuel Cell membranes (DMEC), DMPC have received considerable tention both as a portable power source and as @ replacement for batteries I this paper blends of | PIA and pectin in rao from 10 4 0 99 % PIA were prepared by’ casting ino films These fms were characterized by FTIR, and DSC It was shown that the best propetties for DMC has PlAjpeetin complex with ratio 50/50

Vi6 Kinetics of pertechnetate removal

by amino-functionalized glycidyl methacrylate copolymer

Danijela D Maksin', Radmila V Hereigonja?, Magdalena Z Lazarevié', Marija J Zunie`, Aleksandra B Nastasovic!

‘Ving tustie of Nuclear Sciences, University of Belgrade, Belgrade, Serbia, "Faculy of Physicut Chemistry, Universiyy of Belgrade, Belgrade, Serbia, “ICTM-Center for Catalysis and Chemical Ensiucering, University of Belevude, Belgrade, Serbia, ICTM-Cemter for Chemistry, Polymer Department, University of Belgrade, Belgrade, Serbia

‘Technetium-99 comprises a significant health risk, singe edible plans ean bioaccumulate is ‘most abundant environmental form, « highly mobile pertechnetate anion, and convert it co more from

lipophilic species that eannot be excreted theongh urine, Kineties of pertechnetate rem

aqueous solutions by macroporous erossinked poly(glyeidyl methaerylate-co-ethylene glycol simethaerylate),funetionalized with diethylene triamine, PGME-deta, was investigated, PGME: deta was characterized by elemental analysis, mercury porosimetry and scanning electron mictoseopy Pertechnetate with Te-9m isotope was quantitated by gan

counting techniques, Three Kinetic models (the pseudo-fist, the pseudo-second onder and inmeaparicle diffusion) were used to determine the best-fit equation for pertcebnetate sorption

seinillation

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