hyperbranched and dendritic polyolefins prepared by transition metal catalyzed polymerization

... Overview of transition metal (W, Mo) oxides and their electrochromic properties 1.1 Introduction of transition metal In chemistry, the term transition metal (sometimes also called a transition ... data by Hill and Egdell and Hollinger et al showed that the metal- nometal transition at x ≈ 0.2 was due to localization in a pseudogap between an impurity band and the WO3 conduction band, which ... metal - semiconductor transition at the very end of metallic behavior of much smaller particles The size at which the transition occurs depends on the type of metal and criterion chosen for metallicity...

Ngày tải lên: 25/03/2015, 11:58

... Phosphine Ligands Derived from Amino Acids and Their Applications in Transition- Metal- Catalyzed Asymmetric Reactions 4.1 Introduction 139 4.2 Results and discussions 145 4.2.1 Phosphine-amide ligands ... Phosphine-olefin ligands 167 4.4.2.6 Phosphine-imine ligands 168 4.4.3 General procedure for transition- metal- catalyzed reactions 169 4.4.3.1 Pd -catalyzed AAA reaction 169 4.4.3.1 Ag -catalyzed Mannich ... chiral ligands derived from amino acids, including phosphine-amide ligands, phosphine-peptide vi ligands phosphine-olefin ligands and phosphine-imine ligands These newly developed ligands were...

Ngày tải lên: 09/09/2015, 09:59

... Transition- Metal- Catalyzed C—S and C—C Cross-Coupling Reactions SUMMARY The transition- metal- catalyzed carbon-carbon and carbon-heteroatom bond forming reactions are important and fundamental transformations ... based on transition- metal- catalyzed cross-coupling reactions between thiols or disulfides and aryl halides The newer copper and palladium based methodologies allow for the rapid, direct and efficient ... Introduction Scheme 1.1: Non -Metal- Mediated preparation of aryl sulfides   Chapter 1: General Introduction 1.2 Transition metal- catalyzed cross-coupling reactions The use of transition- metals as catalysts...

Ngày tải lên: 10/09/2015, 15:50

... enlarged the 2PA and 3PA crosssections The later was mainly caused by the introduction of new doping and defect energy levels by the incorporated transition metal ions Transition metal doping provided ... fitted lowest band, second band, third band and size distribution of un-doped and Cu-doped ZnSe/ZnS QDs (Page 77) Table 3.2 QD density, diameter, bandgap energy and 3PA of bulk and QD semiconductors ... Coefficients an, bn, and cn when  p0   and  q0   [4.7] (Page 98) Table 4.2 The Gaussian fitted lowest band, second band, third band and size distribution of un-doped and Cu-doped and Mn-doped ZnSe/ZnS...

Ngày tải lên: 11/09/2015, 10:06

... Spectroelectrochemical and monochromatic Fig Survey scan XPS spectra (a) and W 4f high-resolution XPS spectra (b) for tungsten oxide films of sample A, sample C and sample D, and O 1s level peak ... achieved by reduction at À1 V vs SCE, and the bleached state was obtained by oxidization at +1 V vs SCE The response of color change to the potential on the working electrode was evaluated by the ... of sample A, sample C and sample D deposited on ITO glass substrates are shown in Fig It could be seen that the (2 2), (4 0) and (4 0) peaks located at about 30.21, 35.11 and 50.51, respectively...

Ngày tải lên: 20/03/2014, 13:08

... [(NH4)10W12O41xH2O] (0.15 mol of W) was prepared and acidified with HNO3 2.2 N (Normal) to produce a pH around and then kept in a flask hermetically sealed with stirring by one week at 60 °C Then, ml of ... the detector; and a computer-controlled XY stage with a spatial resolution of 0.1 µm with two interchangeable gratings (600 and 1800 g mm− 1) and a confocal microscope with 10, 50, and 100× objectives ... of the material for the peaks O1 s and W4f are shown in Fig 6a and b respectively Peaks position for O1 s is 530.3 eV and binding energy peak located at 35.4 and 40.6 eV is attributed to W4 f...

Ngày tải lên: 20/03/2014, 13:08

... , CO, and water vapor were measured A given amount of each gas was injected into the chamber and mixed by a fan for 30 s The sensitivity to gases, S, is defined as S = V g /V a , where Vg and Va ... 4f5/2 and W 4f7/2 are found to lie at 37.1 and 35.20 eV, respectively and are contributed to lattice tungsten in the WO3 crystal 3.2 Gas sensing properties of the thin film sensors Results and discussion ... C, but not sensitive to NH3 , gasoline, C2 H5 OH, CH4 and CO and water vapor These results indicate that the WO3 thin film sensor prepared by a sol–gel Fig X-ray photoelectron spectra of the thin...

Ngày tải lên: 20/03/2014, 13:12

... silver nanoparticles prepared by laser ablation (a) and by chemical reduction (b) Fig Absorption spectra of silver nanoparticles produced by laser ablation in a 0.003, 0.01 and 0.1M solution of ... also prepared silver nanoparticles by chemical reduction from an aqueous solution of silver nitrate and trisodium citrate dihydrat C6H7Na3O7 (SCD) which takes the role of both surfactant and reducing ... particles produced by chemical reduction shifted to 440 nm as compared to 400 nm by laser ablation The peak width of silver nanoparticles by laser ablation is narrower than that by chemical reduction...

Ngày tải lên: 22/03/2014, 11:20

... SK, MM, AT, EN, and, YN prepared reagents and PBMCs SH, HK, and YS prepared fusion cells and performed vaccination of the patient TO, KF, JG, and HT participated in its design and coordination ... demonstrated by: 1) augmented DCs function; 2) improved production of IFN-γ in both CD4+ and CD8+ T cells and T-cell proliferation; 3) enhanced induction of CEA and/ or WT1-specific CTL responses; and ... WT1 and HLA-ABC and low levels of CEA but not HLA-DR, CD80, CD86, and CD83 molecules (Figure 1B, 2A, and 5A) Fusions of DCs to the HCC cells coexpressed the HCC cells-derived WT1 antigens and...

Ngày tải lên: 18/06/2014, 15:20

... a mandate to settle is prepared The INAC report and DOJ recommendation are presented to a Litigation committee co-chaired by management representatives from INAC and DOJ If the settlement mandate ... settlement and provides a recommendation as to liability and appropriate damages The settlement recommendation is reviewed by the departmental client, INAC and if it is consistent with policy and operational ... between Model A claims and Model B claims has been abandoned Other changes included making the compensation grid national and expanded in scope, as opposed to regional and establishing the independence...

Ngày tải lên: 20/06/2014, 06:20

... next sealed by the surlyn polymer foil and a cover glass The deposited SWNTs, graphenes, and carbon composites were characterized by field-emission scanning electron microscopy [FE-SEM] and ultraviolet-visible ... work was supported by the Korea Industrial Technology Association (KOITA) Authors’ contributions HK fabricated the cells and wrote the paper HK and HC did the characterization and imaging of the ... of the solar cells SH and YK helped design the experimental study and advised on the project MJ developed the conceptual framework and supervised the work All authors read and approved the final...

Ngày tải lên: 20/06/2014, 23:20

... next sealed by the surlyn polymer foil and a cover glass The deposited SWNTs, graphenes, and carbon composites were characterized by field-emission scanning electron microscopy [FE-SEM] and ultraviolet-visible ... work was supported by the Korea Industrial Technology Association (KOITA) Authors’ contributions HK fabricated the cells and wrote the paper HK and HC did the characterization and imaging of the ... of the solar cells SH and YK helped design the experimental study and advised on the project MJ developed the conceptual framework and supervised the work All authors read and approved the final...

Ngày tải lên: 21/06/2014, 17:20

... for 40 min, NaHSe prepared by 6.0 mg Te and 6.0 mg NaBH4 was added After h stirring, it was refluxed for h Silica coated iron oxide nanoparticles were prepared as described by our previous work ... combined iron oxide nanoparticles and CdTe by amino group In this study, we prepare bi-functional silica nanospheres doped with iron oxide nanoparticles and CdTe QDs by this protocol for the first ... nanoparticles and CdTe nanocrystals indicated QDs can be assembled on the silica surface by amino group, and Liu et al [20] have modified the surface of silica coated iron oxide nanoparticles with CdSe by...

Ngày tải lên: 22/06/2014, 00:20

... Results and Discussion Structural and Morphology Characterization The XRD results of the prepared LSMO nanoparticles at 600, 700, 800, and 900 °C for h are shown in Fig For LSMO samples prepared ... detailed morphologies of the prepared samples for all x values at 900 °C, revealed by SEM and TEM, are shown in Figs and 5, respectively The SEM images reveal that the prepared samples are spherical ... synthesized by citrate-gel route reported by Rajagopal et al [12], and higher than the value of 23 emu/g for La0.7Sr0.3MnO3 nanoparticles (*48 nm) synthesized by sol–gel route reported by Duan et...

Ngày tải lên: 22/06/2014, 00:20

... supported by NSF-EPSCoR and DoD grants We would like to thank Mr William’s assistance of Raman measurements, Mr Ortiz and Ms Hernandez for SEM and EDS measurements, Mr Esteban for XPS measurements and ... bands marked with K1 and K2 located in 770 cm–1 and 870 cm–1 which was shown in Fig 4a, were related to tungsten oxide Typical Raman peaks of crystalline tungsten oxide located at 700 cm–1 and ... energy side of each atomic tungsten peak By looking up the database of National Institute of Standard Technology (NIST), these shoulders were related to WO2 and WOx No specified carbon modified tungsten...

Ngày tải lên: 22/06/2014, 18:20

... Insect and disease-free samples were chosen and cleaned The caps and stipes were manually separated and hot-air dried in an oven (DHG-9140, Qixing, Shanghai, China) at 45 °C for 32 h and 38 h, ... particle sizes of cap and stipe of 54.77 lm and 40.90 lm, respectively Shear pulverized powders were then ground and sheared by the strong force between the lapping wheel and rail of a YSC-701 ... mushroom powders In contrast to the powders prepared by shear pulverization, micronized powders had smaller particle size and higher fluidity, WSI, SC and protein and polysaccharide solubility These improved...

Ngày tải lên: 28/06/2014, 11:20

... such materials and the results compared with other standard 3BS and 4BS samples prepared by the usual chemical processes First capacity ŽAh kgy1 Second capacity ŽAh kgy1 3BS Žstandard sample ... behaviour of PbO active materials prepared from such precursors with the usual active materials prepared by the standard chemical routes Preparation of basic lead sulfates by reactive grinding 2.1 Experimental ... commercial STREM PbO Žmixtures of a- and b-PbO., commercial PROLABO lead sulfate, and pure PbO P PbSO4 prepared by reaction of 5.62 g PbO with 3.01 g H SO4 and 172 g H O at room temperature Scanning...

Ngày tải lên: 05/07/2014, 21:20

... and “consistency” in vertex-signed graphs, and generalizable work on two-graphs (the set of unbalanced triangles of a signed complete graph) and on even and odd polygons and paths in graphs and ... D(Γ); Brown and Spencer e (1971a), Gordon and Witsenhausen (1972a) for D(Kt,t ); Harary, Lindstr¨m, o and Zetterstr¨m (1982a) for a result similar to Thm 1.] (SG: Fr, Rand) o S Alexander and P Pincus ... [corresponding to 0, +1, −1] for nonadjacency and positive and negative adjacency and a for simultaneous positive and negative adjacency Defines addition and multiplication of these symbols (p 8)...

Ngày tải lên: 07/08/2014, 05:23

... (TLR3) recognizes viral double-stranded RNA and its synthetic analog polyriboinosinic:polyribocytidylic acid (poly(I:C)) and induce inflammatory cytokines and dendritic cell activation (for review ... data and writing the manuscript XP participated in the design of the study and the statistical analysis CFH and TCW provided overall supervision and guidance for the project All authors read and ... Amigorena S: Antigen presentation and T cell stimulation by dendritic cells Annu Rev Immunol 2002, 20:621-667 Matsumoto M, Seya T: TLR3: interferon induction by double-stranded RNA including poly(I:C)...

Ngày tải lên: 10/08/2014, 05:21

... or by 12 Chapter metal complexes with a basic ligand For instance, a nickel complex with two aryloxofunctionalized NHCs could be prepared by treatment of the ligand precursor with NaN(SiMe3)2 and ... anionic co-ligands such as azido and isothiocyanato ligands, which are known since late 1960 in the transition metal chemistry of phosphines A 17 Chapter pioneering work by Beck and co-workers ... ligands is indicated by an IR band at 2032 cm-1 The H chemical shifts for the carbene ligand remain largely unaffected by the halo-azido exchange, and as expected, a multiplet at 7.14 ppm and...

Ngày tải lên: 11/09/2015, 10:04