stabilized carbanions with carbonic acid derivatives synthesis of carboxylic acid derivatives
Báo cáo hóa học: " Intermatrix synthesis: easy technique permitting preparation of polymer-stabilized nanoparticles with desired composition and structure" ppt
... in this case is the coincidence of the charge sign of ionic reagent with that of the functional groups of the hosting polymer Figure 3a, b, c shows SEM images of a SPEEK-CuSPSNPs nanocomposite ... One additional advantage of IMS technique deals with the fact that formation of NPs proceeds mainly by the periphery of the hosting polymeric matrix due to the action of Donnan exclusion effect ... the charge of the same sign as that of the functional groups of the polymer (e.g S 2- ) is used instead of a ionic reducing reagent (BH4-) As it is seen in Figure 2, the distribution of PbS-NPs...
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Asymmetric synthesis of furan and oxindole derivatives with bifunctional and multifunctional organic catalysts
... XIAOWEI Table of Contents Thesis Declaration i Acknowledgements iii Table of Contents iv Summary ix List of Tables xi List of Figures xiii List of Schemes xiv List of Abbreviations xvii List of Publications ... ASYMMETRIC SYNTHESIS OF FURAN AND OXINDOLE DERIVATIVES WITH BIFUNCTIONAL AND MULTIFUNCTIONAL ORGANIC CATALYSTS DOU XIAOWEI (B.Sc., Nanjing Univ.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... of Configurations of the Spirooxindole Products 4.4.6 Analytical Data of the Spirooxindole Products 104 109 Chapter A Facile and Versatile Approach for the Asymmetric Synthesis of Oxindoles with...
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Báo cáo khoa học: Reconstruction ofde novopathway for synthesis of UDP-glucuronic acid and UDP-xylose from intrinsic UDP-glucose inSaccharomyces cerevisiae pptx
... catalyzes the formation of UDP-Xyl from UDPGlcA via decarboxylation of the C6 -carboxylic acid component of glucuronic acid (Fig 1) Moreover, UDP-GlcA can also be generated by oxidation of myoinositol ... pool of UDPGlc of the cell in cooperation with AtUXS3 via inhibition of UDP-Xyl by AtUGD1 in vivo Table Quantification of UDP-sugar levels in yeast The amounts of UDP-glucose, UDP-glucuronic acid ... production of UDP-GlcA and UDP-Xyl via conversion of a large precursor pool of UDP-Glc into the derivative molecules Here, we report the generation of yeast strains capable of producing large amounts of...
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Báo cáo khoa học: N-Methylation in polylegionaminic acid is associated with the phase-variable epitope of Legionella pneumophila serogroup 1 lipopolysaccharide pptx
... spectroscopic analysis was used to elucidate the structure of N-methylated derivatives of legionaminic acid Comparison of the 1H NMR spectra of the OPS of pool III from all three investigated strains revealed ... orientation of N1 to C5 as 2-Z would be sterically hindered by interaction of one of the N-methyl groups at N1 (that in cis orientation to N2) with the pyranose ring of legionaminic acid The N-methyl ... N-methylated residues of legionaminic acid contribute to the immunospeci®city of L pneumophila The investigation of binding of mAb 2625 to the N-methylated legionaminic acid Ó FEBS 2002 N-Methylation...
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Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles
... nanometers Most of them are straight and have a smooth surface Fig 3b shows a TEM image of individual curly wire with the average diameter of 400 nm, revealing the typical structure of wire-like ... on the surface of the SiNWs without any aggregation The SAED pattern Fig (a) Low magnification TEM image of SiNWs; (b) TEM image of a single particle-linked wire; (c) TEM image of a single straight ... wires C film SiNWs Diffusion of Si C particles Sizeable SiO Fig A schematic diagram of the growth mechanism of amorphous SiNWs from Si substrate with the assistance of polymer-converted carbon...
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Synthesis of large scale sic–sio2 nanowires decorated with amorphous carbon nanoparticles and raman and PL properties
... is the XRD pattern of the SiC–SiO2 nanowires decorated with carbon nanoparticles In XRD pattern, five peaks indexed with (1 1), (2 0), (2 0), (3 1), and (2 2) are consistent with the standard face-centered ... the core–shell nanostructures of two kinds of nanowires are clearly recognized The SAED patterns recorded from two kinds of nanowires demonstrate that there are a set of sharp single crystal diffraction ... (1 1) spacing of 3C–SiC (an up-left insert of Fig 3b) Compared to the result of XRD measurements, the amorphous shell is SiO2 Therefore it is concluded that our nanowires consist of SiC–SiO2 core–shell...
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synthesis of bundled tungsten oxide nanowires with controllable morphology
... bundles with uniform size occurred, and they appeared to be composed of small bundles Fig 2c is a corresponding TEM image of the bundles synthesized at the concentration of 0.005 M In comparison with ... and (b) HRTEM images of bundled tungsten oxide nanowires synthesized at a concentration of 0.003 M; (c) TEM of bundled tungsten oxide nanowires synthesized at a concentration of 0.005 M Inset in ... (103) of monoclinic W18O49 and in agreement with the election diffraction results (inset in Fig 2b) [15] At concentrations of 0.005M and 0.007M, some new peaks can be observed from the patterns of...
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synthesis of hollow microspheres constructed with fe2o3 nanorods
... spacings of 0.27 and 0.37 nm are consistent with the d values of the (1 4) and (0 2) planes of ␣-Fe2 O3 with a hexagonal structure, respectively In order to understand the formation process of the ... consist of a large quantity of microspheres with typical diameters in the range of 2–4.5 m The SEM image at high magnification shown in Fig 2b reveals that the microsphere is con- Fig XRD patterns of ... patterns of the iron oxide precursor synthesized by the hydrothermal reaction of FeCl3 with H2 O at 140 ◦ C for 12 h in the presence of Na2 SO4 and the products obtained by the calcination of the...
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synthesis of wo3 in nanoscale with the usage of sucrose ester
... method, two types of w/o microemulsion with the composition: 30 wt.% of S1570, 50 wt.% of tetradecane/1butanol and 20 wt.% of aqueous solution (containing of wt.% and 14 wt.% of tungsten (VI) ... in nanoscale with the use of sucrose ester microemulsion In the first method, a w/o microemulsion with the composition: 30 wt.% of S1570, 50 wt.% of tetradecane/1butanol and 20 wt.% of aqueous ... taken from the atomic ratio data of EDX measurements (Fig 4) is WO3 within the limits of the experimental error The wide scan of XPS spectrum within the B.E range of 0–1100 eV and the narrow scan...
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Báo cáo khoa học: New members of the brachyurins family in lobster include a trypsin-like enzyme with amino acid substitutions in the substrate-binding pocket potx
... 27 acids ⁄ 14 acids ⁄ 14 acids ⁄ 14 acids ⁄ 14 acids ⁄ 14 amino amino amino amino amino 15 15 15 15 15 acids acids acids acids acids amino amino amino amino amino acids ⁄ 237 acids ⁄ 237 acids ... Obtaining 5¢ and 3¢ ends by Rapid Amplification of cDNA Ends (RACE) amino amino amino amino amino acids acids acids acids acids Relative molecular mass ⁄ pI of mature protein homology search in GenBank ... comparative modelling The aim of the present work was to study the diversity of trypsins in the digestive gland of P argus, with focus on: (a) the position of lobster trypsins within the brachyurins...
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Báo cáo khoa học: Polysaccharide binding sites in hyaluronate lyase – crystal structures of native phage–encoded hyaluronate lyase and its complexes with ascorbic acid and lactose docx
... 1A) inhibits the activity of HylP2 The structure of the complex of HylP2 with ascorbic acid shows that three molecules of ascorbic acid bind to HylP2 trimer at each one of the three concave surfaces ... in the presence of ascorbic acid In host tissue matrix, the ascorbic acid exists at concentrations in the range 0.2–8 mm [15], which are within the range of the IC50 of ascorbic acid against HylP2 ... 3396 The inhibition data of enzyme HylP2 with ascorbic acid, together with its chemical and structural similarities with hyaluronan polysaccharide, suggest that ascorbic acid may bind at the saccharide...
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rational synthesis of ultrathin n type bi2te3 nanowires with enhanced thermoelectric properties
... compound nanowires For the synthesis of Te nanowires, 20 mL of ethylene glycol is added to a three-neck flask equipped with a standard Schlenk line, followed by adding of 0.2 g of polyvinylpyrrolidone ... for under an axial pressure of 50 MPa and a dc current of 15 kA into bulk pellets with 2.54 cm in diameter and around 0.25 cm in thickness with a relative density of ∼80% Figure shows the typical ... (EDS) analysis is performed on both of these materials, the results of which are shown on the right of the corresponding XRD patterns Indeed, a significant amount of Bi is observed in the nanowires...
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rational synthesis of ultrathin n type bi2te3 nanowires with enhanced thermoelectric properties
... compound nanowires For the synthesis of Te nanowires, 20 mL of ethylene glycol is added to a three-neck flask equipped with a standard Schlenk line, followed by adding of 0.2 g of polyvinylpyrrolidone ... for under an axial pressure of 50 MPa and a dc current of 15 kA into bulk pellets with 2.54 cm in diameter and around 0.25 cm in thickness with a relative density of ∼80% Figure shows the typical ... (EDS) analysis is performed on both of these materials, the results of which are shown on the right of the corresponding XRD patterns Indeed, a significant amount of Bi is observed in the nanowires...
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facile synthesis of zno micro-nanostructures with controllable morphology and
... growth of ZnO, and results in the morphology of ZnO changing from “wire” to “flower”, “urchin” and “wire” with the addition of different amounts of ammonia Due to the different surface areas of the ... This will influence the growth of ZnO micro-nanostructures, leading to change in the morphology of ZnO The pH of the reaction solution increases with the addition of ammonia At the same time, the ... Effect of synthesis conditions on the growth of ZnO nanorods via hydrothermal method, Physica B 403 (2008) 3713–3717 [15] R Chander, A.K Raychaudhuri, Electrodeposition of aligned arrays of ZnO...
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synthesis of large-scale uniform mulberry-like zno particles with
... rectangle ZnO while the formation of smaller ZnO particles with Fig SEM images of ZnO prepared (a) with TEA (b) without TEA (c) with equimolar NaOH and (d) with equimolar HMTA J.Z Ma et al / ... image of the prepared ZnO 3.2 Formation mechanism of mulberry-like ZnO particles The controlled experiments of microwave-assisted hydrothermal process and without TEA, instead of TEA and with ... amounts of TEA were carried out to confirm the effects of TEA on the morphology of the ZnO samples The formation mechanism of such ZnO was then investigated to judge the possible extent of this synthesis...
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báo cáo hóa học:" Arthroscopic debridement of the osteoarthritic knee combined with hyaluronic acid (Orthovisc®) treatment: A case series and review of the literature" docx
... OA of the knee is extremely common, with some studies showing that OA of the knee occurs in at least 30% of people after the age of 50 years, and in 80% of people older than 75 years [4,5] Of ... pain scores after 24 weeks with a single delivery of ml/90 mg of Orthovisc® at the time of the arthroscopic debridement with over 79% of our patients having an improvement of greater than 40% However ... subsequently closed with interrupted nylon sutures before the injection of HA with the exception of the arthroscope portal Standard dosage of HA (Orthovisc®) is ml/30 mg (15 mg of HA/ml) per injection...
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Báo cáo hóa học: " Hydrothermal synthesis of MnO2/CNT nanocomposite with a CNT core/porous MnO2 sheath hierarchy architecture for supercapacitors" potx
... self-assembled MnO2 nanoflakes of pure MnO2 microspheres, these MnO2 nanoflakes grown on CNTs are much smaller in dimension, typically with a thickness of less than nm The formation mechanism of the present ... MnO2 layer consisting of interconnected nanoflakes onto the surface of the CNTs The structure, surface morphology, composition, and specific surface area of the as-prepared nanoflaky MnO2/CNT nanocomposites ... results of the Raman measurement agree well with the XRD results confirming that the birnessite-type MnO2 has been formed during the hydrothermal treatment with or without the CNTs Morphologies of...
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Báo cáo hóa học: " Self-propagating high-temperature synthesis of nano-TiCx particles with different shapes by using carbon nano-tube as C source" doc
... paragraphs on the mechanism of the TiCx shape variation with the different kinds of the Me addition Figure gives the TEM images of the TiCx particles formed in the samples with 80 wt.% Me The diffraction ... by Graduate Innovation Fund of Jilin University Author details Key Laboratory of Automobile Materials, Ministry of Education, People’s Republic of China 2Department of Materials Science and Engineering, ... experiments, because of the high activity of the CNT, the samples with 70 wt.% Al and 80 wt.% Cu and Fe can be ignited easily Figure 1b shows the variation in the maximum combustion temperature with the...
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Báo cáo hóa học: " Facile template-free synthesis of pine needle-like Pd micro/nano-leaves and their associated electro-catalytic activities toward oxidation of formic acid" pot
... performance of as-prepared catalysts for the formic acid electro-oxidation The inset of Figure shows the CV of formic acid oxidation on the Pd electrode, which was deposited for Figure XRD patterns of ... current density of formic acid oxidation This demonstrates that the electrocatalytic stability of the Pd micro/nano-leaves for formic acid oxidation is much higher than that of the Pd nanoparticles, ... People’s Republic of China 2Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi, 830011, People’s Republic of China 3Jiangxi Key Laboratory of Organic Chemistry,...
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Báo cáo hóa học: " A Facile Synthesis of Polypyrrole/Carbon Nanotube Composites with Ultrathin, Uniform and Thickness-Tunable Polypyrrole Shells" ppt
... expressed in Figure The surface Figure Diagram of synthesis process for PPy/MWCNT composites Page of modification of MWCNTs was performed with carboxylic acid groups yielding MWCNT-COOH Importantly, ... nanoparticles of polymer are found The various ratio of ethanol and acid solution as the reaction solution significantly influence the morphology of the PPy/ MWCNT composites The detail of synthesis ... decrease of the specific capacitance with the increase of PPy thickness is clear As shown in Figure 7A, the specific capacitance of the PPy/CNT composites decreases with the increase of PPy thickness...
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Tìm thêm: xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008