effect of the ratio benzyl alcohol nitrobenzene on the yields after 19 h
Supported group II transition metal catalysts in liquid phase reactions using borrowing hydrogen methodology 1
... dehydrogenation of the alcohol can be coupled with the hydrogenation of the newly formed double bond Rather than performing the hydrogenation of the functionalized carbonyl, the hydrogen can be ... N-alkylation of benzyl alcohols with anilines ix Table 5-1 N-alkylation of nitroarenes using alcohols Table 5-2 Effect of the ratio benzyl alcohol/ nitrobenzene on the yields after 19 h Table 5-3 ... of alcohols Indirect Wittig reaction and α-alkylation of ketones β-Functionalisation of alcohols H O R H CH3 - 2H O H2 NR' CH R' P= R R' Base 'X+' CH3 O R' O H CH3 + 2H O R' H R N R H CH3 R Scheme...
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the study common errors of reported speech made by grade 11 students at doc binh kieu high school, kien giang province
... 1.2 A with the help of their teacher B with the help of their friends C by themselves D Others: ………… Figure 3.8: How the students can recognize their errors of reported speech 33 How the students ... and the students have had to correct them by themselves B They have given the students the answers and asked the students to repeat them C They have given the students the answers and asked the ... most of the students don‟t have their own computers However, the library of their school is equipped with many computers linked with the Internet for them to search information if they want The...
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Tài liệu Báo cáo khoa học: The mechanism of a-proton isotope exchange in amino acids catalysed by tyrosine phenol-lyase doc
... deviation from the geometry optimal for the abstraction of the a-proton For the reaction of TPL with L-methionine the rate of abstraction of the a-proton, leading to formation of the quinonoid ... reasonable to conclude that the transfer of the proton (or deuteron) from the amino group to the a-carbon atom of the quinonoid intermediate should go faster than the isotopic exchange of the ... which forms the aldimine bond with the carbonyl group of the cofactor, PLP, in the holoenzyme structure For the reaction of any nondeuterated substrate in D2O the amino group, after the proton...
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Tài liệu Báo cáo Y học: Phosphatidylinositol synthesis and exchange of the inositol head are catalysed by the single phosphatidylinositol synthase 1 from Arabidopsis docx
... quantitative terms than the CMP-independent one; and, finally, a reaction which is the reverse of synthesis, dependent on higher concentrations of CMP [10] As the exchange reaction has also been suggested ... synthesis, one might wish to inhibit the exchange and one laboratory reported, to this end, that the addition of mM EDTA was sufficient to abolish the exchange ability of PtdIns synthase when ... pH of 8.0 and the presence of manganese ions In the range of concentrations tested, we found an optimum free manganese ion concentration of 2.5 mM, a value that is in the same range as the concentrations...
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Báo cáo khoa học: Active site residue involvement in monoamine or diamine oxidation catalysed by pea seedling amine oxidase doc
... charge-bearing HEX on ionic strength indicates the lack of charge– charge interactions of this substrate These observations, together with the negligible variations of Km on pH, and the positive values of ... deprotonated state In the case of HEX the ionization contributions to k1 vanish ~1 includes all the other energy terms contribk uting to the kinetic constant (i.e the contribution of the electrostatic ... DSÃ DHÃ þ À ; h R RT where DH* is the heat of activation, DS* is the entropy of activation, kB is the Boltzmann constant, h is the Plank constant, R is the gas constant and j is the transmission...
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Báo cáo khoa học: Kinetic deuterium isotope effects for 7-alkoxycoumarin O-dealkylation reactions catalyzed by human cytochromes P450 and in liver microsomes Rate-limiting C-H bond breaking in cytochrome P450 1A2 substrate oxidation pdf
... the contribution of P450 2E1, an enzyme with a higher Km [23] (Tables and 3) The high noncompetitive isotope effects are interpreted to mean that the step(s) involving the chemistry of C -H bond ... factor in determining the rates of the reactions under all conditions Some shifting of the oxidations to the alternate 3-hydroxylation reactions occurs with some of the enzymes (with 7-OMe and 7-OEt ... 3) Another possible complication is the oxidation of the product acetaldehyde by P450 2E1 [33] and the effect on the apparent kinetic constants, which has not been considered in detail here because...
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Báo cáo khoa học: Cofactor-independent oxygenation reactions catalyzed by soluble methane monooxygenase at the surface of a modified gold electrode pot
... respectively) The effect of ventilating the reaction at the highest catalase concentration was also investigated as shown strongly suggested that hydrogen peroxide was responsible for the lack of catalytic ... its nonaquated form within the highly hydrophobic pocket adjacent to the binuclear iron centre [2,18] than aquated hydrogen peroxide in the bulk solution The need for catalase in the electrochemically ... intermediate P The catalytic efficiency of the peroxide shunt reaction is not high, the maximum rate of methane oxygenation being only approximately 10% of that observed with the whole sMMO system;...
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Genetic Manipulation of DNA and Protein – Examples from Current Research Edited by David Figurski potx
... halophilic characteristics of GlcDH Therefore, the behavior of the triple mutant GlcDH in the salt concentrations assayed could be due to the introduction of the mutation D172K and D216K The profiles ... temperature at high salt concentration Probably, these data are the result of an alteration of the hydration shell, which is required for halophilic proteins to be stable at high salt concentrations Analysis ... concentrations Analysis of the high resolution GlcDH structure has shown that the size and order of the hydration shell in the halophilic enzyme is significantly greater than in non-halophilic proteins...
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Báo cáo khoa học: NADH oxidation and NAD+ reduction catalysed by tightly coupled inside-out vesicles from Paracoccus denitrificans doc
... up the curve (curve 2) DISCUSSION The results of this work clearly show that the affinity of the NADH-binding site of the bacterial complex I to substrates of the direct and the reverse reactions ... concentrations, while the mitochondrial enzyme is inhibited by nanomolar concentrations of rotenone (see Table 1) Fig Dependence of NADH-oxidase activity of SPP on the concentration of rotenone SPP were ... accumulation is reduced in time (curve 1) The reason for that is the dinucleotide oxidation in the NADH-oxidase reaction At a certain NADH concentration the rate of NAD+ reduction becomes equal to that...
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KINEMATIC GEOMETRY OF SURFACE MACHINING 2008 by Taylor & Francis Group ppt
... concept in the theory of surface generation, namely that the part surface is the primary element of the part surface-machining operation The rest of the elements are the secondary elements of ... rotation of the twist drill and of the translation of the worktable, which is carrying the work, results in the hole being machined in the work Drilling of that same hole can be performed on a lathe ... based on the consideration of the relative motion of the work and of the cutting tool regardless of the kind of elementary absolute motions that are performing the work and the cutting tool Use of...
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"Historical Dictionary of Modern Chinese Literature" by Li-hua Ying - Part 11 pdf
... everything Through the madman’s grievances against his rival, the husband of the actress, the author accentuates the contrast between the values of the city and those of the countryside and the ... as the fearless wolves reflect the qualities that help the Mongols win wars and overcome the harsh environment Reminiscent of Jack London’s The Call of the Wild, the novel is a eulogy for the ... Revolution The epic Bu tian lie (Patching Up the Sky) presents the heroic revolt against the British at the beginning of colonial Hong Kong Her other fictional works include Nianlun (Growth 74 •...
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Báo cáo y học: " Inhibitor of IκB kinase activity, BAY 11-7082, interferes with interferon regulatory factor 7 nuclear translocation and type I interferon production by plasmacytoid dendritic cells" ppsx
... for one hour with different concentrations of BAY11 (10-9 to 10-6 M) or vehicle The pDCs were then cultured for a further 24 hours with poly U in complex with lipofectamine (A) The concentrations ... with up to × 10-7 M of BAY11 Therefore, we thereafter used 10-9 M to × 10-7 M of BAY11 for the following assays We further investigated the effect of BAY11 on the pDC maturation Up to × 10-7 M of ... that the repression of TNF-α results in abating the inhibitory function of BAY11 against IFN-α production at high concentration Thus, the most efficient and practical biological concentration...
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Group 10 and group 11 transition metal chemistry of benzimidazolin 2 ylidene and indazolin 3 ylidene ligands
... “push-pull -effect The +M effect pushes the lone pair electrons of the N atom into the empty p orbital of the carbene carbon atom, thereby increasing the electron density of the carbene center This effect ... geometry On the other hand, substituents on the carbene, which are -electron donor atoms, namely N, O, P, S and halogens, increase the energy of the p orbital of the carbene carbon atom Since the ... aspect of NHCs that surpasses their phosphine counterparts is the orientation of the steric bulk in their metal complexes As shown in Figure 1.8, in the case of phosphines the three substituents on...
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Development of direct asymmetric aldol reactions mediated by primary amino acid derived organocatalysts exploring DNA cleaving activities of varacin b and varacin c
... addition of a nucleophile with the new electrophile HX then gives an enamine intermediate, which yields the final product after hydrolysis N O X H H - H2 O R iminium ion R N H2 N X + H2 O H R * HX H ... 1-26 OH HN H N O 1-27 1-28 O Ph Ph N H NH O HN NH N H HN p-Tol N H 1-30 N H N(n-C1 0H2 1)2 HN 1-31 TBDPSO O HN O SO2CF3 F3C 1-29 N H O O HN 1-25 O O O O O N H SO2Ph 1-33 OH 1-34 1-32 O O N H HO H N ... listed in Scheme 1-15 - 18 - PhD Thesis Jiang Zhaoqin O O OH HO O O OH HO NH2 O OH NH2 1-43 NH2 1-44 O R OH NH2 NH2 1-47 O O Ph O O N H NH2 O 1-50 OH 1-51 N Ph 1-52 NH2 HN O 1-49a: R = H 1-49b:...
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Synthesis and characterization of group 11, 12 and 13 metal selenocarboxylates potential single molecular precursors for metal selenide nanocrystals 3
... absorption spectra of CdSe NPs synthesized with/without HPA To examine the effect of HPA on the growth of CdSe NPs, the samples were synthesized in various HPA concentrations and absorption spectra of ... solution was too high which cause a re-emission or the recombination of surface traps Varying the concentration of HDA and growth temperature not affect the size of the ZnSe NPs based on the approximate ... fringes of these NPs are visible in the HRTEM images The EDAX analysis on these NCs confirmed the presence of the respective metal and selenium with ratio close to 1:2 Further, 130 Chapter ZnSe...
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Synthesis and characterization of group 11, 12 and 13 metal selenocarboxylates potential single molecular precursors for metal selenide nanocrystals 1
... size of these NCs are tunable by changing the reaction conditions The growth mechanism of these NCs has been proposed In the following chapter, a similar precursor, [(Ph3P)2Cu2(SeC{O}Ph)2] has ... C H ··O hydrogen bonding is present between one of the methylene hydrogen atoms and the carbonyl oxygen of the thiocarboxylate ligand as shown in Figure 1.1 The 31P NMR studies show that the ... Introduction to Monochalcogeno Carboxylate This reflects the influence of R group of the thiocarboxylate ion on the solid-state structure When the stoichiometric ratio of CuCl : NaSC{O}R : Ph3P is...
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Synthesis and characterization of group 11, 12 and 13 metal selenocarboxylates potential single molecular precursors for metal selenide nanocrystals 2
... crystals However, when the monomer concentration is high enough (low nuclei concentration), the nuclei grew into cubes To demonstrate the effect of nuclei concentration on the morphology of Ag2Se, ... TEM study of Ag2Se particles has revealed that the phase transformation has no effect on the shape or the crystallinity of the NCs, which further proves that the shape and size of the Ag2Se NCs ... crystallinity of the particles There is no drastic change in the morphology and only a slight change in the size of the particles when we increased the amount of HDA under the same conditions When we...
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SEVERAL THESES ON THE SUBJECT OF INTERCULTURAL THEATRE SUPPLEMENTED BY SEVERAL KEY EXAMPLES THAT INCLUDE STATIONARY WRITERS, TRANSLATIONS, TRAVELLERS ON FOOT, HORSES, OR VESSELS, AND SEARCH ENGINES
... which we know little Perhaps, the persons of Artaud “stand on the threshold of the text in which they are put into play, or, rather, their absence, their eternal turning away, is marked on the ... paths: that of one who continues to recognise in the land he crosses the words and places of the book, and the path of one who takes back his words and figures, engraves the flower in the hardness ... in the course of the given It is contingent upon chance encounters and the reaction to them The narrative then takes up the form as (absolute) presentation Presentation then is the inter-connection...
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Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam 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 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 điều tra đối với đối tượng giảng viên và đối tượng quản lí 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 mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 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