surface modification of articulating surfaces and tribological evaluation

... loss of magnetism and dispersibility Therefore, the surface modification of nanoparticles is indispensable and the particle surface can be modified by grafting inorganic or organic coating Surface ... of MNPs endows the particles with important properties Modification of the surface of MNPs prevents agglomeration of the particles and thus stabilizes the colloidal system Functionalization of ... FTIR spectra of (a) CM-β-CD polymer, (b) uncoated MNPs and (b) CDpoly-MNPs, (B) XPS C 1s spectrum of CDpoly-MNPs, (C) TEM xiv image of CDpoly-MNPs, and (D) zeta potentials of bare MNPs and CDpolyMNPs...

Ngày tải lên: 08/09/2015, 19:41

... of baculovirus-based vectors could be achieved through this surface modification In summary, the information gained from our research, such as development of modified vectors and evaluation of ... UNIVERSITY OF SINGAPORE AND INSTITUTE OF BIOENGINEERING AND NANOTECHNOLOGY July 2006 ACKNOWLEDGMENTS First and foremost, I wish to express my appreciation to my supervisor, Dr Wang Shu, Associate Professor, ... Professor, Department of Biological Science, National University of Singapore; Group Leader, Institute of Bioengineering and Nanotechnology, for his continuous support and patient guidance And to my co-supervisors,...

Ngày tải lên: 14/09/2015, 11:28

... and average surface roughness (Sa) of all pipettes have been measured Figures 3, 4, 5, and show correlations between pulling parameters and Dt and Sa As it can be seen from Figures 3, 4, 5, and ... significantly decreases Dt and Sa The effects of pull and heat are very similar and not as significant as the effect of velocity Delay and pressure are factors to change the taper length of the pipettes ... heat, both of the Sa and Dt decreases Tip diameter ( m) Tip diameter ( m) Surface roughness (nm) Sa Dt Surface roughness (nm) Sa Delay Figure The effect of delay on tip diameter and average surface...

Ngày tải lên: 21/06/2014, 03:20

... sample.24 The mechanism of size-dependent UC properties may be attributed to the surface ligands quenching, surface defects and surface segregation.25 Therefore, surface modification of UC nanoparticles ... and further surface modification of silica shell by PEG and amino group Use of Au nanoparticles to further decorate the surface of silica coated UC nanoparticles by a reverse micro-emulsion and ... micro-emulsion and study of the effect of concentration of Au nanoparticles on the emission of UC nanoparticles Study of emission properties, dispersion and stability of Au, PEG and amino modified...

Ngày tải lên: 09/09/2015, 10:20

... of (c) 0.61, (d) 2.44 and (e) 3.66 Figure 3.5: Effect of [4VP]/[-CH2CF2-] molar feed ratio on the surface [N]/[C] ratio and the surface graft concentration ([-4VP-]/[-CH2CF2- ]surface ratio) of ... with a standard pore diameter of d=0.22 µm 12 Figure 5.1: Schematic illustration of the process of ozone-pretreatment and graft copolymerization of PVDF with inimer BIEA, preparation of “surfaceactive” ... spectra of (a) the Si-COOCH3 and (b) the SiCH2OH; (c) XPS C 1s and N 1s core-level spectra of the Si-Azo surface Figure 6.3: AFM micrographs of the silicon surface: (a) the pristine Si(100) surface; ...

Ngày tải lên: 16/09/2015, 15:54

... the implant surface owing to the various surface modification techniques were shown in Table 2.1 Table 2.1 Different types of implant surface modifications and their surface roughness and contact ... coated with functionalized PLGA/Collagen nanofibers 10 LIST OF TABLES Table 2.1 Different types of implant surface modifications and their surface roughness and contact angle Table 2.2: Various fabrication ... size and possibly decreased diameter of surface pores, (ii) enhanced surface wettability due to greater surface roughness and (iii) greater numbers of grain boundaries There are a number of physical...

Ngày tải lên: 02/10/2015, 12:55

... electronegativity of fluorine may also withdraw electrons from critical surface active sites and increase the difficulty of surface modifications 1.3: Surface Modification and crosslinking Computational ... the electrophysical properties of the ATO (100) surface The coordination of surface metal and oxygen bonds is fivefold and twofold respectively, instead of sixfold and threefold coordinated in ... (100) surface of both pure and Sb doped SnO2 were checked for surface oxygen dimerization and none were found The geometrically optimized pure and Sb doped SnO surfaces displayed similar degrees of...

Ngày tải lên: 06/10/2015, 21:06

... They offer a promising tool for treatment of cationic and anionic dyes in wastewater viii List of Tables Table 2-1 Properties of α-, β- and γ-CDs 24 Table 2-2 Advantages and disadvantages of the ... solvents, acidic and alkaline solutions and it is found that pure methanol and ethanol in water (90% v/v) can desorb about 90% of RhB and all of AB25 from the adsorbent The recyclability of CMCD-MNPs ... Preparation of magnetic particles 15 2.2.4 Surface modification of magnetic particles 17 2.2.5 Application of magnetic particles 19 2.2.5.1 Biotechnology and biomedical 19 ii 2.2.5.2 Biotechnology and...

Ngày tải lên: 12/10/2015, 17:36

... Electron Microscopy (SEM) and Alamar Blue test Chapter presents the results of nanofibrous surface modification of PCL membrane in terms of surface characterization and cell behavior studies ... the hydrophilicity of the PCL surface The nanofibrous PCL membrane scaffold was subjected to a series of characterization from both engineering and biological perspectives The surfaces were characterized ... Gross structure of the heart consists of four pumping chambers with the right and left atria forming unit and the right and left ventricles forming another The right and left sides of the heart...

Ngày tải lên: 26/11/2015, 22:40

... the evaluation of a surface realisation system (as opposed to a complete generation system), typically the choice of vocabulary is limited and often the task is closer to word reordering Many of ... Melamed, Ryan Green, and Joseph P Turian 2003 Precision and recall of machine translation In Proceedings of NAACL-03, pages 61–63, NJ, USA Karolina Owczarzak, Josef van Genabith, and Andy Way 2008 Evaluating ... 2006 A study of translation error rate with targeted human annotation In Proceedings of AMTA 2006, pages 223–231 Anja Belz and Ehud Reiter 2006 Comparing automatic and human evaluation of NLG systems...

Ngày tải lên: 23/03/2014, 17:20

... addition to our evaluation techniques 16 Summary 17 Surface SEMG of swallowing is a simple and reliable method for screening and initial evaluation of dysphagia and odynophagia complaints of various ... proposed for SEMG evaluation of dysphagia and odynophagia SEMG evaluation of deglutition is not a new diagnostic method Nevertheless, lack of standard requirements decrease the outcome of this investigation ... reactions are objective and EMG can provide us with qualitative and quantitative data Figure day, pain score and odynophagiasingle swallow and normal drinking of 100 cc of example of a7)due to tonsillectomy,...

Ngày tải lên: 11/08/2014, 20:20

... three different surface finishes (in decreasing roughness): a machined surface, a matt surface, and a highly-polished mirror surface These surfaces had a value of Ra of between 127 μm and 178 μm For ... first understand the mechanics of the adhesion of ice to solid surfaces An early work in this field of study was done by Raraty and Tabor (1959) Here the measurement of adhesion strength of ice onto ... roughness is one of the more important parameters that will be studied in this dissertation Surface roughness is a measure of the degree of smoothness of the surface of an object, and it can be...

Ngày tải lên: 08/09/2015, 18:19

... liver tissue and other similar soft tissues, like the kidney and the heart, to solve the shortage of organ donors Furthermore, the results of surface modification will improve our understanding on ... in 1987 and defined as “the application of the principles and methods of engineering and life sciences toward the fundamental understanding of structure-function relationships in normal and pathological ... effects of polymers on the morphologies, release and degradation profiles of the microsphere scaffolds were studied and the bioactivity of released HGF was assessed by using Hep3B cells and primary...

Ngày tải lên: 12/09/2015, 08:18

... processes of Ar plasma pretreatment and UV-induced graft copolymerization of FPI with VIDz to form the VIDz-g-FPI surface and 4VP to form a 4VP-g-FPI surface, and the activation of the modified FPI surface ... scan and C 1s core-level spectra of (a) the pristine FPI-1 surface, the delaminated (b) Cu surface and (c) FPI-1 surface from a Cu/VIDz-g-FPI-1 assembly; the delaminated (d) Cu surface and (e) ... core-level spectra of (a) the pristine PI surface, and the PI surfaces after (b) W and (c) 120 W of Ar plasma treatment for 30 s, followed by air exposure Figure 4.3 FTIR spectra of (a) the 4VP monomer,...

Ngày tải lên: 17/09/2015, 17:20

... influence of an increase in surface area and porosity of streamside on the amount and succession along with the downstream distance of aquatic biota in each trophic level, and (2) a separate evaluation ... protozoa and metazoa in the biofilm Amounts of added inhibitors were DCMU (an inhibitor of photosynthesis of phytoplankton) mg, ATU (an inhibitor of respiration of nitrifying bacteria) mg, and nystatin ... evaluation of the activity of each microbial community using the oxygen production rate and uptake rate of the biofilm attached to the streamside MATERIALS AND METHODS Description of test channel...

Ngày tải lên: 05/09/2013, 08:40

... (rooftop of Sumida-ku Ward Office as catchment area) and communal RWH called ‘rojison’ - 190 - Journal of Water and Environment Technology, Vol 9, No.2, 2011 From the interviews with Sumida-ku officers, ... policy makers and end-users) Journal of Water and Environment Technology, Vol 9, No.2, 2011 Mandatory Scheme The introduction of WWR and cumulative charging system are considered as mandatory schemes, ... water demand reduction in industrial sectors and enhancement of people’s awareness towards water conservation The implementation of intermediary scheme i.e RWH and finally the execution of mandatory...

Ngày tải lên: 05/09/2013, 10:17

... form is even: then S is a connected sum of copies of P1 × P1 and of a K3 surface if the signature is negative, C C and of copies of P1 × P1 and of a K3 surface with reversed orientation C C if ... complex surfaces S whose fundamental group Γ cannot be the fundamental group of a real surface Our surfaces are surfaces isogenous to a product; i.e., they are quotients (C1 × C2 )/G of a product of ... Otherwise S is of mixed type and it has a canonical unramified double cover which is of unmixed type and C1 ∼ C2 (see = 3.16 of [Cat6] for more details on the realization of surfaces of mixed type)...

Ngày tải lên: 14/02/2014, 16:20

... properties of reducible surfaces, in particular of unions of planes When the surface is the central fibre of an embedded flat degeneration of surfaces in a projective space, we deduce some properties of ... arithmetic genus and is a flat limit of rational normal curves in Pn 343 THE K OF DEGENERATIONS OF SURFACES We will often consider two particular kinds of trees Tn : a chain Rn of length n and the fork ... recall some properties of smooth surfaces which degenerate to Zappatic ones 339 THE K OF DEGENERATIONS OF SURFACES In Section we recall the notions of minimal singularity and quasi-minimal singularity,...

Ngày tải lên: 16/02/2014, 06:20

... method of Chomczynski & Sacchi [29] using Trizol reagent The integrity and quality of puri®ed RNA were controlled by 1% agarose gel electrophoresis and measure of the absorbance at 260 and 280 ... understand the biological signi®cance of the different regulation of their expression As a ®rst element step towards understanding, a recent demonstration indicated that the synthesis of cell surface ... estradiol 17a (0.28%), estrone and estriol (0.45%) The sensitivity of the assay was pg per tube Intra- and interassay coef®cients of variation were less than 10% The analysis of the radioimmunoassay...

Ngày tải lên: 21/02/2014, 03:20