structure synthesis and surface active properties
controlled synthesis and gas sensing properties of hollow sea urchin like
Ngày tải lên :
05/05/2014, 15:26
... is the first report of the selective synthesis of ␣-Fe2 O3 superstructures and nanocubes The gassensing properties of the ␣-Fe2 O3 superstructures, nanocubes and nanoparticle aggregations with ... and relative humidity of 5–38% Results and discussion 2.3 Gas-sensing properties test 3.1 Microstructures of hollow sea urchin-like ˛-Fe2 O3 nanostructures and ˛-Fe2 O3 nanocubes Measurements on ... and (c and d) ␣-Fe2 O3 products prepared by calcining of ␣-FeOOH precursors at 600 ◦ C in air for h 384 F Zhang et al / Sensors and Actuators B 141 (2009) 381–389 Fig (a and b) Typical TEM and...
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Báo cáo hóa học: "Nanocrystal and surface alloy properties of bimetallic Gold-Platinum nanoparticles" pdf
Ngày tải lên :
22/06/2014, 22:20
... dendrimer-based synthesis [8], the observed 2113 cm–1 band was attributed to adsorption on Au sites though the band for CO on monometallic gold was not detected, and a 2063-cm–1 band was attributed ... band, i.e., from a relatively-broad band feature to a narrow band feature that resembles that of the Pt-atop CO band (Figure 2), is observed to occur at ~ 65% Au, below which the Au-atop CO band ... that the AuPt nanoparticles exhibit bimetallic surface properties This finding further led to the correlation of the Au-atop and Pt-atop CO bands on the surface of the alloy nanoparticles of a wide...
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Báo cáo hóa học: " Wet chemical synthesis and magnetic properties of single crystal Co nanochains with surface amorphous passivation Co layers" pdf
Ngày tải lên :
21/06/2014, 04:20
... substrate surface Based on both these curves, coercive fields (Hc) of 355.8 and 93.6 Oe, respectively, for NCs and PSC, saturation magnetizations (Ms) of 125.7 and 162.5 emu/g, respectively, for NCs and ... of published SY and YQ: partly carried out the TEM and HRTEM experiments, as well as drafted the manuscript XL, LS, and HL: conceived of the study, and participated in its design and coordination ... chemical synthesis and magnetic properties of single crystal Co nanochains with surface amorphous passivation Co layers Nanoscale Research Letters 2011 6:285 Submit your manuscript to a journal and...
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HUMAN MILK OLIGOSACCHARIDES: CHEMICAL STRUCTURE, FUNCTIONS AND ENZYMATIC SYNTHESIS
Ngày tải lên :
28/08/2013, 16:28
... later life (Palmer et al., 2007) 2.2 Structures and biosynthesis of HMOs HMOs are the third most abundant molecular species in human milk after lactose and fat and amount approximately 15g/L (Coppa ... The motif with terminal structure Fucα1-2Gal is H antigen, and H antigen is attached to GlcNAc with β1,3 and β-1,4-linkages to create H1 and H2 antigens, respectively A and B antigens are formed ... oligosaccharides: chemical structure, functions and enzymatic synthesis Figure Anti-adhesive and glycome-modifying effects of HMOs (adapted from Bode L, 2009) “Most bacteria (commensals and pathogens) express...
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Tài liệu Báo cáo khoa học: The crystal structure of human a-amino-b-carboxymuconatee-semialdehyde decarboxylase in complex with 1,3-dihydroxyacetonephosphate suggests a regulatory link between NAD synthesis and glycolysis ppt
Ngày tải lên :
18/02/2014, 06:20
... residues and solvent molecules engaged in ligand recognition and stabilization are drawn as balls -and- sticks and spheres, respectively The major interactions established between the DHAP inhibitor and ... ligand O1 and O1P ˚ atoms at 2.5 and 2.8 A, respectively Moreover, the ligand is engaged in a number of stabilizing interactions with the protein milieu by contacting both protein residues and ... superposition of the hACMSD:DHAP and PfACMSD:ligand-free structures Protein residues are colored in white for hACMSD and in green for PfACMSD, with the DHAP ligand in yellow; the protein portion...
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Tài liệu Báo cáo khoa học: Fatty acid synthesis Role of active site histidines and lysine in Cys-His-His-type b-ketoacyl-acyl carrier protein synthases ppt
Ngày tải lên :
19/02/2014, 08:20
... efficiency and precision with which these various enzymes carry out synthesis of rather complicated molecules such as ring systems [13] and wax components [14] are attractive 696 properties for drug synthesis ... including crystal structures of both CHH and CHN enzymes [1,4,5,11,12] have contributed to the understanding of the role of conserved residues in the active site of CHH condensing enzymes, and analogies ... [6,15–18] and in cancer treatment [19,20] A description of the exact role, electrostatic properties, and hydrogen bonding potentials of active site residues provides an optimized model of the ligand-binding...
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Tài liệu Báo cáo khoa học: Physico-chemical characterization and synthesis of neuronally active a-conotoxins docx
Ngày tải lên :
19/02/2014, 12:20
... size, route of discovery, method of synthesis and reference for synthesis Asterisks (*) indicate an amidated C-terminus The letters O and Y denote hydroxyproline and sulfotyrosine, respectively The ... of neuronally active a-conotoxins using HPLC and MS, including identification of post-translational modifications Isolation and identification Standard procedures for identification and isolation ... cleavage and reversed-phase HPLC purification in applications for synthesis of cholecystokinin-12 and bradykinin containing tyrosine sulfate [57], and could perhaps be applicable to synthesis...
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TRANSFER RNA: MOLECULAR STRUCTURE, SEQUENCE,AND PROPERTIES
Ngày tải lên :
13/03/2014, 19:38
... three-dimensional structure of one tRNAspecies and to discuss the extent to which it explains and makesunderstandable various aspects of the chemistry and solution behavior of this and other tRNA ... interaction of Dand T¢;Cloops by augmenting stacking interaction Stabilizes T~C loop aStandard symbols used for referring to basesandto their atoms Rstands for a purineandYstands for a are pyrimidine ... aspects of tRNA biosynthesis and function during protein synthesis, virtually nothing is knownabout the manner in which tRNAmolecules are degraded tRNA and the Regulation of Enzyme Synthesis Oneof...
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Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko
Ngày tải lên :
17/03/2014, 14:51
... ELECTRONIC STRUCTURE AND MO PROPERTIES OF SOLIDS In a study of the band structure of V and Cu, Norman and Koelling [86] found that the LMH potential gave an improvement in the Fermi surface for ... electronic structure, optical, MO, and XMCD properties of compounds and multilayered structures Chapter of this book is of an introductory character and presents the theoretical foundations of the band ... experimental and theoretical investigations of the electronic structure, optical and MO properties of transition metal multilayered structures (MLS) The most important from the scientific and the technological...
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hydrothermal synthesis and crystal structure of a novel one - dimensional tritungstate
Ngày tải lên :
19/03/2014, 16:48
... absorption bands at 935 and 975 cmy1 are ascribed to Õ ŽW s O., and the features in the 784–889 cmy1 region are most likely associated with Õ ŽO–W–O modes In addition, absorption bands at 1480 and 1624 ... of WO6 at WŽ1 is defined by two terminal oxo groups and four unsymmetrical bridging oxo groups, and at WŽ2 and WŽ3 by one terminal oxo group and five unsymmetrical bridging oxo groups WŽ1 site ... of tungstenŽVI oxides, and WŽ2 and WŽ3 show one short-three intermediate-two long bond length pattern enH 2q cations occupy interstrand regions 4y of the W6 O 20 chains and exhibit strong hydrogen...
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synthesis and optical properties of colloidal tungsten oxide nanorods
Ngày tải lên :
20/03/2014, 13:08
... localized states in the band gap due to impurities.22b In light of these assignments, we suggest that the UV emission of nanorod samples in this work might correspond to the band-toband transition The ... presumably, due to its irrelevance to the band structures of the tungsten oxide system In summary, we have reported the first solution-based preparation of soluble and highly crystalline tungsten oxide ... and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and...
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synthesis, electrical measurement, and field emission properties of a-fe2o3 nanowires
Ngày tải lên :
20/03/2014, 13:08
... NW/ CAFM-tip structure and (b) the ITO/a-Fe2O3 film /CAFM-tip structure Fig The CAFM images of (a) morphology and (b) current taken at a ?10 V bias 123 336 emitters, a-Fe2O3 film, and ITO glass ... a-Fe2O3 NWs, a-Fe2O3 film, and Fe film were present in stage I At this stage, for both samples I and II, short NWs (\100 nm) and long NWs ([500 nm) grew from the low and high degree defect regions ... resistance between the CAFM tip and the NW RNW and Rfilm are the resistances of the NW and the film, respectively The overall resistance (Roverall) is the sum of Rcontact, RNW, and Rfilm It can be expressed...
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Báo cáo khoa học: Surface-enhanced vibrational spectroscopy for probing transient interactions of proteins with biomimetic interfaces: electric field effects on structure, dynamics and function of cytochromec doc
Ngày tải lên :
22/03/2014, 16:20
... demands are imposed on the sensitivity and selectivity of the methodology, which should provide molecular structure and dynamics information In this article, we present the potential of Raman and ... optical processes via coupling of the radiation field with surface plasmons of nanostructured Ag or Au These surface- enhanced RR (SERR) and surface- enhanced IR absorption (SEIRA) difference spectroscopies ... 223–232 10 Siebert F & Hildebrandt P (2007) Vibrational Spectroscopy in Life Science Wiley-VCH, Weinheim 11 Murgida D & Hildebrandt P (2001) Active site structure and dynamics of immobilized cytochrome...
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Báo cáo khoa học: Total chemical synthesis and NMR characterization of the glycopeptide tx5a, a heavily post-translationally modified conotoxin, reveals that the glycan structure is a-D-Gal-(1fi3)-a-D-GalNAc pot
Ngày tải lên :
23/03/2014, 13:20
... trifluoroacetic acid and immediately injected onto RP-HPLC and fractions collected were collected and analyzed with ESI and MALDI-MS Chemical reduction The native and synthetic tx5a (hydrophilic and hydrophobic) ... between GNH3 of GalNAc and GH1 of Gal, which is labeled in bold The amino acids Gly6, Thr10 and Pro13 are represented by 6G, 10T and 13P Ó FEBS 2004 Glycopeptide tx5a synthesis and NMR analysis (Eur ... residues Thr10 and Ala12 and the carbohydrate moieties of GalNAc (GN) and Gal (G) The individual amino acids Thr10, Ala12 are represented by 10T and 12A, respectively, while GNH1 and GNH3 represents...
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Báo cáo " Synthesis and thermoelectric properties of La(Fe1-xSix)13 compounds (x = 0.12, 0.14 and 0.15) " pptx
Ngày tải lên :
28/03/2014, 13:20
... between the ferromagnetic and paramagnetic states is 27 % and 18% for x = 0.12 and 0.14, respectively Finally, the thermal conductivity (κ) of La(Fe1-xSix)13 (x = 0.12, 0.14 and 0.15) compounds is ... have a cubic NaZn13– type crystal structure - The thermoelectric properties of La(Fe1-xSix)13 compounds have been investigated below 300 K The values of thermopower and lattice conductivity are small ... patterns used to determine their crystal structure parameters were collected by Rigaku Rint-2000 with Cu K α The thermopower, electrical resistivity and thermal conductivity were measured by...
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Báo cáo khoa học: Physical properties and surface activity of surfactant-like membranes containing the cationic and hydrophobic peptide KL4 potx
Ngày tải lên :
30/03/2014, 11:20
... favored by the presence of Ca2+, which caused surface charge neutralization and ⁄ or PA extraction Role of the lipid composition and peptide structure on surface adsorption activity Figure shows the ... experimental and clinical meconium aspiration syndrome [13] and in patients with acute respiratory distress syndrome (ARDS) [14] The surface activity of KL4 peptide incorporated in bilayers and monolayers ... peptide and lipid bilayers, and their dependence on calcium Therefore, the objectives of this study were to analyze (a) the effect of KL4 on the physical properties of membranes, in the absence and...
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Zinc Oxide Nanostructures: Synthesis and Properties
Ngày tải lên :
28/04/2014, 15:06
... ZnO nanostructures Issues of synthesis methods, structural, electrical, optical, magnetic and gas sensing properties are summarized Synthesis of ZnO Nanostructures 2.1 Vapor Transport Synthesis ... vapor transport synthesis of ZnO nanostructure, and also employ less rigorous synthesis conditions and provide great potential for device applications Physical Properties of ZnO Nanostructures Table ... physical properties of ZnO nanostructures, including mechanical, piezoelectric, electrical, optical, magnetic and chemical sensing properties Table Physical properties of wurtzite ZnO Properties...
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synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26
Ngày tải lên :
04/06/2014, 15:20
... has been paid to the synthesis and characterization of bimetallic nanoparticles due to their unique catalytic, electronic, optical, structural and thermal properties [1-5] and subsequent technological ... composition and their structures on their catalytic properties [15-19] Au-Ag nanoparticles of alloy type structure exhibit high catalytic activities for low-temperature CO oxidation [18, 20] and aerobic ... subject of considerable interest; and the developed of simple and versatile methods for controlling the composition and structure of Au-Ag nanoparticles is an important and challenging task Bimetallic...
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fattorusso - modern alkaloids - structure, isolation, synthesis and biology (wiley, 2008)
Ngày tải lên :
04/06/2014, 15:25
... organize our handbook to present the different aspects of alkaloid science (e.g the structure and pharmacology of bioactive alkaloids; recent advances in isolation, synthesis, and biosynthesis) ... Pharmacy and Molecular Biotechnology Im Neuenheimer Feld 364 69120 Heidelberg Germany I Bioactive Alkaloids: Structure and Biology Modern Alkaloids: Structure, Isolation, Synthesis and Biology ... microbes and against desiccation; formation of a thick bark in roots and stems against water loss, microbes, and herbivores; development of spines, thorns, hooks, trichomes, and glandular and...
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