synthesis of zeolites and manufacture of zeolitic catalysts and adsorbents
Applications of heterogeneous catalysts in synthesis of fine chemicals and rare sugars
... of Group MgO catalysts 58 3.2.3.2 BET and XRD results of Group MgO catalysts 62 3.2.3.3 BET and XRD results of Group MgO catalysts 65 3.2.4 CO2-TPD 68 3.2.4.1 CO2-TPD of Group MgO catalysts 68 ... MgO catalysts 59 Table 3-2 Surface area and pore volume of Group MgO catalysts 63 Table 3-3 Surface area and pore volume of Group MgO samples 66 Table 3-4 Density of basic sites of Group MgO catalysts ... eliminating waste and avoiding the use of toxic and/ or hazardous reagents and solvents in the manufacture and application of chemical products From feedstocks to solvents, synthesis and processing,...
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Asymmetric synthesis of furan and oxindole derivatives with bifunctional and multifunctional organic catalysts
... development of asymmetric synthesis of furan and oxindole derivatives with tertiary amine thiourea organocatalysts, including enantioselective synthesis of 3(2H)-furanones and 2,3-dihydrofurans with ... in almost all types of reactions, and good selectivities can often be achieved by combining chiral ligands and suitable metals However, high cost and toxicity of the metals, and stringent reaction ... 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...
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Latest developments on application of heterogenous basic catalysts for an efficient and eco friendly synthesis of biodiesel
... conversion of 96% and is near to the specification of EN 96.5%) Zeolites have shown conversion ranging from 85% to 95% and have taken longer reaction time for completion of reaction and thus will ... lower the AV and then alkali catalyst is utilized for biodiesel synthesis Enzymes are the other important catalysts possessing high selectivity and belonging to the homogeneous group of catalysts ... production of biodiesel is their comparatively high cost Cheaper homogeneous acid and alkali catalysts provide high yield and conversion of biodiesel However, they need thorough washing by water and...
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Synthesis of high surface area zirconia and zirconia based catalysts
... of Project 28 References 30 Chapter II Experimental 2.1 Preparation of Catalysts 36 36 2.1.1 Synthesis of Zirconia 36 2.1.2 Synthesis of Silica-Zirconia 36 ii 2.1.3 Modification of Zirconia and ... oxide catalysts to their rates of dehydration and dehydrogenation of 2-propanol They found that the acidity and activity of MoO3-P2O5 catalysts increases with an increase in the P2O5 content and ... adsorption of ammonia or pyridine and the activity of 2-propanol dehydration and 1butene isomerisation [65] On the other hand, the basic strength of a solid surface is defined as the ability of the...
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Tài liệu Báo cáo khoa học: Physico-chemical characterization and synthesis of neuronally active a-conotoxins docx
... subtypes, 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 ... analysis and chemical synthesis of these peptides muscle-acting a-conotoxin MI and the neuronally acting a-conotoxin MII [11–13] A biological interpretation of this emerging pattern of paired ligand ... Amidation of C-terminus Sulfation of tyrosine Hydroxylation of proline Carboxylation of glutamic acid Cyclization of N-terminal Gln O-Glycosylation Bromination of tryptophan Isomerization of tryptophan...
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Tài liệu Báo cáo Y học: The glucose-specific carrier of the Escherichia coli phosphotransferase system Synthesis of selective inhibitors and inactivation studies pptx
... pseudosubstrates and as reversible and irreversible inhibitors of EIIGlc and EIIMan Two assays were employed: (a) nonvectorial phosphorylation of Glc (analogues) by solubilized and purified EII and by EII-containing ... 279 ([M + Na]+, 100%) RESULTS Synthesis of inhibitors The synthesis and characterization of compounds 1b, 1d, 1f, 1g and 3b (Scheme 1) is reported for the first time, and the epoxypropyl derivative ... (1982) Synthesis of destomic and epidestomic acid, and their C-6 epimers Carbohydr Res 104, 87–104 30 Johns, B.A., Pan, Y.T., Elbein, A.D & Johnson, C.R (1997) Synthesis and biological evaluation of...
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Environmental Goods and Services A Synthesis of Country Studies pot
... environmental goods and services”.2 They recognised also the importance of technical assistance and capacity building in the field of trade and environment and encouraged the sharing of expertise and experience ... hectare per capita of arable land in Nicaragua The amount of arable land per capita provides a useful indicator of how intensively the land is used and how much maintenance and management is required ... storage or recovery of non-hazardous waste It includes management and other services related to waste handling, the collection and purchasing of waste and scrap, and the operation of recycling plants...
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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
... 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 ... compilation ª 2006 FEBS 2647 Synthesis of UDP-glucuronic acid and UDP-xylose T Oka and Y Jigami Similarly, we assayed UDP-Xyl synthesis by providing UDP-GlcA as substrate and NAD+ as cofactor The cytoplasmic ... or used in the synthesis of oligosaccharides and polysaccharides of the cell wall In S cerevisiae, however, d-glucuronic acid and d-xylose are not components of the cell wall and are not attached...
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Báo cáo khoa học: "Analysis and Synthesis of the Distribution of Consonants over Languages: A Complex Network Approach" pptx
... well as synthesis of the distribution of the consonants across the languages In the current work, with the help of PlaNet we provide a systematic study of certain interesting features of the consonant ... set of nodes labeled by the languages and VC is the set of nodes labeled by the consonants E is the set of edges that run between VL and VC There is an edge e ∈ E between two nodes vl ∈ VL and ... the other hand Regime of Figure 3(a) as well as Regime of Figure 3(b) comprises of the rest of the consonants The point marked as x in both the figures indicates the breakpoint Each of the regime...
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Báo cáo khoa học: Kinetics of enzyme acylation and deacylation in the penicillin acylase-catalyzed synthesis of b-lactam antibiotics pptx
... the (Vs/Vh)max and the KNapp for this reaction were higher than observed for synthesis of ampicillin Values of 47 ± mM for KNapp and of 3.6 ± 0.22 for (Vs/Vh)max for the synthesis of ampicillin ... concentration [N] and the results of the inhibition studies show that, despite of the high rate of hydrolysis of the acyl-enzyme, tight binding of the nucleophile and displacement of the catalytic H2O molecule ... 7) The Vs/Vh ratio is the ratio of the reaction rates of aminolysis and hydrolysis of the acyl-enzyme The curvature of the plot of Vs/Vh vs the mole fraction of D2O indicates therefore that the...
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Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles
... substrate and dispersed in a solution of HAuCl4 (10 mL, 0.1 M) with the aid of ultrasonication to give a suspension The suspension was supersonicated for 30 min, aged for h, and was gravity-filtered and ... 7:1 on average While, the EDX spectrum of particle-linked wires on the tip of SiNWs film, shown in Fig 2b, reveals that these wires consist of Si, C and O, and further quantitative analysis shows ... 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 SiNWs and...
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Synthesis of large scale sic–sio2 nanowires decorated with amorphous carbon nanoparticles and raman and PL properties
... agreement with the results of XRD and TEM Two peaks centered at $1337 and $1592 cmÀ1 often called as D- and G-band, respectively confirm the existence of carbon [22–25] The D-band is known as to appear ... intensity ratio of two bands, ID/ IG, can be expressed as follows: ID CðkÞ ¼ La IG where C(k) is 4.4 nm for incident laser wavelengths of 514 nm [28,29] The intensities of the D-band and G-band were ... 5, spectrum (a) and (b) were recorded from two kinds of nanowires Strong enhancement of blue emission band at about 482 nm (2.58 eV) and appearance of a new yellow emission band centered at about...
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Climate-Smart Agriculture: A Synthesis of Empirical Evidence of Food Security and Mitigation Benefits from Improved Cropland Management docx
... average and stability of production levels For instance, crop and grassland restoration projects often take land out of production for a significant period of time, reducing cultivated or grazing land ... are serious and growing threats to the sustainability of the yields of the Green Revolution lands (Pingali and Rosegrant 1998) And there is even evidence of declines in the rates of yield growth ... areas of South and East Asia Discussion Paper Washington DC, IFPRI Pender, J and B Gebremedhin 2007 “Determinants of Agricultural and Land Management Practices and Impacts on Crop Production and...
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Báo cáo Y học: Synthesis of phosphoenol pyruvate (PEP) analogues and evaluation as inhibitors of PEP-utilizing enzymes pot
... 1c and 1d The last two isomers and the chlorinated analogues 2g and 3c are candidates for the irreversible inactivation of PEP-utilizing enzymes MATERIALS AND METHODS Enzyme I, and the rest of ... the presence of pyruvate kinase and L-lactate dehydrogenase [27] The experiments were carried out in the presence of 0.04 UÆmL)1 of enolase and mM MgCl2 or 0.15 UÆmL)1 of enolase and mM MnCl2 ... catalysts in the active site of enolase: comparison of the properties of K345A, E168Q, and E211Q variants Biochemistry 35, 1692–1699 28 Liu, J., Peliska, J.A & O’Leary, M.H (1990) Synthesis and...
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facile synthesis of porous a - fe2o3 nanorods and their application in ethanol sensors
... (c, d) TEM and HRTEM images of porous R-Fe2O3 nanorods (e) The corresponding ED pattern and (f) HRTEM image of a single R-Fe2O3 nanorod The morphologies of the as-prepared R-FeOOH and R-Fe2O3 ... vapor with concentrations of 50, 100, 200, 500, and 1000 ppm The sensing properties of R-Fe2O3 nanoparticles with an average particle size of about 30 nm and a surface area of 18.31 m2/g, reported ... with a volume of 15 L at a working temperature of 250 °C and 40% relative humidity (RH) An appropriate amount of ethanol vapor was injected into the closed chamber by a microinjector, and the sensor...
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hydrothermal synthesis of na2ti6o13 and tio2 whiskers
... electrode of CO2 gas sensors and clarify the ion exchanges at the interface between the gas and electrolyte For instance, Holzinger et al [16] improved the longterm stability and selectivity of fast ... purification, decomposition of NOx and improvement of living conditions by removal of various pollutants, etc [19–21] In this paper, we also demonstrated the preparation of TiO2 whisker by extracting ... shows XRD pattern and TEM micrograph of TiO2 powder prepared by precipitation e2373 and subsequent heat treatment at 450 1C It has well-crystallized anatase structure and consists of spherical particles...
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simple and rapid synthesis of a-fe2o3 nanowires under ambient conditions
... Material (ESM) In spite of intensive research into one-dimensional structures of metal oxides in particular and NWs in general, our understanding of the mechanisms of their formation and growth is still ... accumulated in the Fe3O4 and FeO layers and cannot directly affect the 377 Nano Res (2009) 2: 373 379 growth of the NWs Figure shows our understanding of the NW formation conditions and a suggested mechanism ... basis of our experimental results and literature data The formation of NWs occurs when three layers of iron oxides are gradually formed by oxidation of iron We believe that the growth of NWs...
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solvent-controlled synthesis of tio2 1d nanostructures growth mechanism and characterization
... 8, 16 and 24 h, respectively, and (d) TiO2 nanotubes (sample S2); (e) HRTEM image of the sample S2 and the inset shows the enlarged picture of the tube wall; (f) HRTEM image of sample S1 and the ... to CO2 and was not related to the samples Also a band appears around 453 cmÀ1 for all the samples, which corresponds to a Ti–O band of anatase phase of TiO2 [27,28] The intensity of this band increases ... the FTIR spectra of the samples S1–S4 All the spectra show broad bands at 3435 and 1635 cmÀ1, which correspond to the presence of the OH group and water, absorbed on the surface of the TiO2 samples...
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synthesis of hematite (r-fe2o3) nanorods diameter-size and shape effects on their
... where Rs(air) and Rs(gas) are the resistance of the sensor in clean air and in detected gas, respectively Results and Discussion 3.1 Morphology, Characterization, and Formation Mechanism of the As-Obtained ... precursors, 50 mL of 0.06 M iron chloride (FeCl3) aqueous solution, with/without the addition of 0.300 mol of inorganic salts (NH4Cl, KCl, and Na2SO4) was put in a conical flask and stirred with ... not only the first example of investigating the magnetic property evolution of nanorods/nanowire diameters and porosity, but also the first example of the fabrication of hematite nanostructure...
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synthesis of iron oxide nanorods and nanocubes in an imidazolium ionic liquid
... Synthesis of nanorods 2.1 Materials The mixture for the synthesis of iron oxide nanorods contained mL of freshly dried [BMIM][Tf2 N], 40 L (0.13 mmol) of oleic acid, 43 L (0.09 mmol) of oleylamine and ... General synthesis and separation procedures In a typical synthesis of iron oxide nanoparticles, freshly dried [BMIM][Tf2 N] was mixed with predetermined amount of oleic acid, oleylamine and 1,2-hexandecandiol ... wall of flask after the reaction and removal of IL, and (F) the IL after reaction (the vial on the left) and the final product dispersed in hexane (the vial on the right) Experimental 2.3 Synthesis...
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Tìm thêm: xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn 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 tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam 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 lồng sóc mở máy động cơ rôto dây quấn 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 sự cần thiết phải đầu tư xây dựng nhà máy 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