liquid phase synthesis of mtbe from isobutene and methanol on hpa based catalysts
Báo cáo khoa học: Reconstruction ofde novopathway for synthesis of UDP-glucuronic acid and UDP-xylose from intrinsic UDP-glucose inSaccharomyces cerevisiae pptx
... genetic control of direct-repeat recombination in Saccharomyces: the Synthesis of UDP-glucuronic acid and UDP-xylose effect of rad52 and rad1 on mitotic recombination at GAL10, a transcriptionally ... the inhibition constant (Ki) of AtUGD1 Inhibition by UDP-GlcA and UDP-Xyl was measured with various concentrations of UDP-Glc and saturating levels of NAD+ Double-reciprocal plots of the data ... assay conditions cells UDP-GlcA synthetic activity was assayed by providing UDP-Glc as substrate and NAD+ as a cofactor The cytoplasmic fraction of control W303a cells showed no conversion of UDP-Glc...
- 13
- 541
- 0
synthesis of iron oxide nanorods and nanocubes in an imidazolium ionic liquid
... pattern of iron oxide nanocubes: (A and B) nm nanocubes made from a reaction solution at Fe(CO)5 concentration of 50 mM and Fe(CO)5 :oleic acid molar ratio of 1:1, and (C) 13 nm nanocubes from a ... combination of changing the concentrations of capping agents and subtle variation in temperature between about 280 and 310 ◦ C could results in the formation of iron oxide nanorods and possibly ... Influence of the self-organization of ionic liquids on the size of ruthenium nanoparticles: effect of the temperature and stirring, J Mater Chem 17 (2007) 3290–3292 [10] J Dupont, On the solid, liquid...
- 8
- 758
- 0
Báo cáo hóa học: " Aqueous-Phase Synthesis of Silver Nanodiscs and Nanorods in Methyl Cellulose Matrix: Photophysical Study and Simulation of UV–Vis Extinction Spectra Using DDA Method" docx
... strong SPR band at *400 nm, while Ag nanorods usually show a red-shifted long-axis resonance (longitudinal plasmon band) and a slightly blueshifted short-axis resonance (transverse plasmon band); ... localized surface plasmon resonance bands (LSPR) in the UV–vis region when the incident light resonates with the conduction band electrons on their surfaces [51] The optical properties of silver nanoparticles ... dimension along the long axis to that of the short axis Effect of aspect ratio on the optical scattering and absorption efficiencies and their relative contributions to the total extinction were systematically...
- 8
- 348
- 0
Development of liquid phase microextraction techniques combined with chromatography and electrophoresis for applications in environmental analysis
... fiber-protected liquid- phase microextraction HPLC high-performance liquid chromatography LC liquid chromatography LGLME liquid- gas -liquid microextraction LLE liquid liquid extraction LLLE liquid- liquid -liquid ... of the ionic liquids considered in this work 107 Figure 6-3 Schematic of headspace ionic liquid- based LPME (a) 110 Extraction set up (b) Thermal desorption in GC injection port Extraction profile ... reagent 35 Figure 2-3 Concentration of the derivatization reagent 36 Figure 2-4 Effect of extraction solvent on extraction and derivatization 37 Figure 2-5 Extraction time profile of carbamate pesticides...
- 144
- 320
- 0
synthesis of porous fe2o3 nanorods and deposition
... calibration of the binding energy (BE) scale Results and Discussion The influence of the experimental conditions on the morphology and structure are studied The as-prepared iron (31) Zhong, Z.; ... the deposition of the Au colloids on the catalyst supports In a typical preparation, 0.50 g of R-Fe2O3 was added to 10 mL of DI water, followed by 1.5 mL of 0.01 M HAuCl4 and 1.5 mL of 0.01 M Lysine ... produced by reduction of HAuCl4 with NaBH4 in the presence of the capping reagent (lysine) and the catalyst support At the same time, during the reduction, ultrasonic irradiation (sonication) was applied...
- 7
- 449
- 1
in vitro release of ketoprofen from proprietary and extemporaneously manufactured gels
... Effect of molarity and pH on the diffusion profile of ketoprofen .85 Effect of temperature on the diffusion profile of ketoprofen 86 Effect of mass on the diffusion profile of ketoprofen ... Effect of drug concentration on the release of ketoprofen from Franz diffusion cells and European Pharmacopoeia diffusion cells (n = 5) .139 Figure 5.28 Effect of pH on the release of ketoprofen from ... combinations of chemicals and iontophoresis, chemicals and electroporation, chemicals and ultrasound, iontophoresis and ultrasound, electroporation and iontophoresis and electroporation and ultrasound...
- 222
- 693
- 0
Báo cáo hóa học: "Synthesis of carbon nanotubes with and without catalyst particles" doc
... graphite constructing a carbon nanotube and bSiC on the surface of (111) b-SiC Lower panel: Schematic of the orientation relationship between one [111] SiC plane, on which carbon nanotubes are standing ... http://www.nanoscalereslett.com/content/6/1/303 Page of Ceramic and semiconductor catalysts Of the non-metallic catalysts for CNT, SiC is the most widely used and historically one of the first to be exploited ... Nonetheless the successful integration of CNT into applications and large-scale production processes remains limited and is dependant on the understanding of several fundamental issues Some of...
- 9
- 438
- 0
báo cáo hóa học:" Controllable Synthesis of Single-Crystalline CdO and Cd(OH)2 Nanowires by a Simple Hydrothermal Approach" docx
... the 10-h one is composed of CdO and Cd(OH)2 Based on the results, one can see that there is the conversion of Cd(NO3)2Á2H2O to Cd(OH)2 in the initial hours of synthesis plausibly by means of hydrolysis ... and/ or various kinds of defects With such strong emission peak at *517 nm, the CdO-nanowire bundles can be utilized in the industry of high-quality monochromatic laser Conclusion In conclusion, ... availability of ionic species, nanoparticles accumulated on the positive nanostrands, resulting in the generation of nanowire bundles Under the adopted hydrothermal conditions, the nanostrands are...
- 5
- 309
- 0
Báo cáo hóa học: "Platinum Assisted Vapor–Liquid–Solid Growth of Er–Si Nanowires and Their Optical Prope" potx
... 477-nm line, and the electrons excite from the valence band (VB) to the conduction band (CB) Then, the recombination of the electrons in the CB with holes in the VB yields emissions of *0.8 eV ... gas phase, (2) chemical reaction on the vapor liquid interface, (3) diffusion in the liquid phase, and (4) incorporation of atoms in a crystal lattice [18, 23–25] Nevertheless, an explanation ... kinetics of the VLS process [23] and our previous study on the formation of Er shells on the SiNWs [11], the mechanism of incorporation of Er into the NWs could be schemed as dissolving Er into liquid...
- 5
- 332
- 0
Báo cáo hóa học: " Synthesis of Tapered CdS Nanobelts and CdSe Nanowires with Good Optical Property by Hydrogen-Assisted Thermal Evaporation" docx
... the liquid solid interface In this process, a liquid cluster of metal catalyst provides energetically favored sites for the absorption of gas -phase reactants, and sizes of the catalysts are considered ... rapid reaction between CdS and H2 produces very large vapor pressure of CdS gas in source zone and high supersaturation in deposition zone, which makes for 2-dimensional nucleation [21, 22] Besides ... and the source zone temperature of 650 °C Samples collected from the silicon substrates were characterized by a field-emission scanning electron microscopy (FE-SEM, Sirion 200), high-resolution...
- 5
- 242
- 0
Báo cáo hóa học: " Microwave-Assisted Synthesis of Titania Nanocubes, Nanospheres and Nanorods for Photocatalytic Dye Degradation" pptx
... Therefore the strong emission in the region of 360–363 nm is assigned to the exciton emission originating from the recombination of a hole with an electron, whereas the weak and broad emission peaks ... involve irradiation of a semiconductor such as TiO2 with energy greater than or equal to the band gap of the semiconductor This promotes electrons from the valence band to the conduction band, generating ... conditions The precipitated sol was irradiated in a microwave oven in on and off mode for different durations depending upon the precipitation rate in each case The completion of the reaction...
- 9
- 346
- 0
báo cáo khoa học: " Evidence-informed health policy 1 – Synthesis of findings from a multi-method study of organizations that support the use of research evidence" pptx
... both versions of the questionnaire, and made a small number of final modifications to both versions of the questionnaire [20] We sent the questionnaire by email to 176 organizations and followed ... organizations' outputs are the lack of dissemination and implementation strategies for the outputs, and the lack of monitoring and evaluation of impact; 4) the interview finding that most organizations ... comparison of results of meta-analyses of randomized control trials and recommendations of clinical experts Treatments for myocardial infarction Journal of the American Medical Association 1992,...
- 7
- 261
- 0
Báo cáo y học: " Influence of gender, sexual orientation, and need on treatment utilization for substance use and mental disorders: Findings from the California Quality of Life Survey" pot
... collaborated on the design of the original survey study and contributed to the interpretation of findings and writing of the paper; SDC conceived and directed the original survey study and contributed ... both race/ethnicity and sexual orientation [71,72] Exploration of the interactions among gender, sexual orientation, and race/ethnicity on treatment use is beyond the scope of the present paper, ... area in need of more investigation Conclusion Study limitations This study encountered several limitations typical of telephone -based follow-back surveys The California Quality of Life Survey...
- 10
- 625
- 0
Solid-Phase Synthesis of N-Carboxyalkyl Unnatural Amino Acids
... Solid -Phase Synthesis of Substituted Amines The above examples demonstrate the wide synthetic application of N-alkylation with %-halocarbonyl compounds by solution -phase chemistry The utilization of ... reductive amination.43 Thus, the utilization of solid -phase synthesis and combinatorial chemistry is an area of potential utility for the synthesis of such analogs 1.3.1 Solid -Phase Synthesis of ACE Inhibitors ... the formation of the major diastereomer with absolute configuration of R Scheme 17 Use of N-Alkylation in the Total Synthesis of Ecteinascidin 743 Ou et al.31 reported the synthesis of 9H-carbazole-9-carboxylic...
- 257
- 322
- 0
Synthesis of various magnetic nanostructures and the microwave characterizations 1
... ions and half of the Fe3+ ions occupy octahedral sites, while the other half of the Fe3+ ions occupy tetrahedral sites So the electron transfer between Fe3+ and Fe2+ gives rise to ion jumps and ... coprecipation, hydrothermal and thermal decomposition have been investigated for a long period Coprecipitation process involves two stages:[77] a short burst of nucleation when the concentration of the ... microwave absorption Based on the Snoek’s law and skin effect, the option of magnetic materials used for microwave absorbers should have high saturation magnetization, high anisotropy field and high resistivity...
- 25
- 328
- 0
Synthesis of various magnetic nanostructures and the microwave characterizations 2
... information by high-resolution and high-magnification images or crystal structure information by diffraction patterns Fig 2.3 demonstrates the two operation modes of TEM, i.e diffraction mode and ... absorptions and the resulting spectra are also shown 𝛅 represents isomer shift and 𝚫 represents the quadrupole splitting This effect consists of the recoil-free, resonant absorption and emission of ... be detected and that contain information about the sample’s surface topography and composition The types of signal produced include secondary electrons (SE), back-scattered electrons (BSE), primary...
- 19
- 316
- 0
Synthesis of various magnetic nanostructures and the microwave characterizations 3
... calculated based on Eq (3.1) and Eq (3.2) The figures in Fig 3.6 are shown to present the comparison of computed effective permeability and permittivity of three volume concentrations of Fe/SiO2 particle ... structure Fig 3.3 Comparison of experimental results: (a) the complex permittivity and (b) complex permeability of Fe/Epoxy and Fe/SiO2/Epoxy composites The volume concentration of magnetic filler is ... 8.6% Fig 3.4 Comparison of experimental results: (a) the complex permittivity and (b) complex permeability of Fe/Epoxy and Fe/SiO2/Epoxy composites The volume concentration of magnetic filler is...
- 10
- 272
- 0
Synthesis of various magnetic nanostructures and the microwave characterizations 4
... selected for further investigations on the size-controllable synthesis and the microwave absorption performance 4.2.2 Fabrication and characterizations of micron and submicron Fe/Al flakes Sample S0 ... high saturation Fig 4.4 (a) X-ray diffraction patterns and (b) M-H loops of Fe -based solid solutions; the inset is for a clear observation of saturation magnetization magnetization of 212 emu/g, ... corresponding to a higher resonance frequency All of these works show the improvement of the flake-shape on the electromagnetic properties of particles 56 Chapter Microwave properties of micron and...
- 18
- 250
- 0
Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn 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 xác định thời lượng học về mặt lí thuyết và thực tế điều tra đối với đối tượng giảng viên và đối tượng quản lí 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 lồng sóc đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu 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 chỉ tiêu chất lượng 9 tr 25