synthesis of methyl ketones

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

Ngày tải lên : 21/06/2014, 17:20

... 15] Synthesis of nanostructures via simple wet-chemical method is one of the most favoured routes towards the cost-effective large-scale production of nanobuilding blocks Chemical synthesis of ... with a very few number of spheres The histogram of nanodiscs distribution (Fig 2b) shows that majority of discs have a diameter of *55 nm On the other hand, HR-TEM photograph of green-coloured silver ... 1c), obtained by using mM of sodium citrate, shows the presence of only silver nanorods of different aspect ratios (R = 3–7) The histogram of particle distribution of corresponding silver nanorods...

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Tài liệu Experiment 17 Preparation of Methyl Orange ppt

Ngày tải lên : 12/12/2013, 21:16

... solution of N,N-dimethylaniline (0.010 mol) in 0.010 mol of acetic acid in a 25 ml Erlenmeyer flask Now add the dimethylaniline acetate solution slowly with constant stirring to the suspension of the ... acetic acid This forms the dimethylaniline acetate salt Neutralize this in situ and the dimethylaniline becomes a good nucleophile due to the activating effect of the dimethylamine substituent Attack ... melting point of your methyl orange as it decomposes on heating In order to observe the beautiful color change that occurs with our orange indicator dye, dissolve a small amount of the methyl orange...

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Tài liệu Báo cáo khoa học: Enhanced thermostability of methyl parathion hydrolase from Ochrobactrum sp. M231 by rational engineering of a glycine to proline mutation pdf

Ngày tải lên : 15/02/2014, 01:20

... 1, whereas the T50 of G198P was lower than that of the WT enzyme The T50 of the double point mutant (G194P ⁄ G198P) was similar to that of the WT enzyme and between those of G194P and G198P To ... energies of the G194P were lower than those of the WT enzyme (Table 2) As the structure of the G194P mutant become more stable than that of the WT enzyme, the rmsf values (calculated by the MDS) of ... measuring the release of the product, p-nitrophenol, from the substrate, methyl parathion [5,8] The assay mixture (150 lL) contained lL of mgÆmL)1 methyl parathion, 50 lL of puriﬁed protein FEBS...

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Tài liệu Management Information Systems A Synthesis of Transit Practice ppt

Ngày tải lên : 18/02/2014, 11:20

... referenced Because of the size of the capital investment, the similarity of need, the rate of change in information technology, and the proliferation of vendors, the creation of a public framework ... Investigators responsible for the conduct of the synthesis were Sally D Liff, Manager, Synthesis Studies, and Donna L Vlasak, Senior Program Officer This synthesis was edited by Linda S Mason Valuable ... responsibility and oversight This type of model has led to the emergence of pockets of MIS resources outside of the primary computing environment Lack of training and funding are two critical...

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Tài liệu Báo cáo khoa học: Physico-chemical characterization and synthesis of neuronally active a-conotoxins docx

Ngày tải lên : 19/02/2014, 12:20

... 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 ... mechanisms of incorporation of PTMs in the biosynthesis of conopeptides Appropriate methods of analysis need to be addressed to ensure recognition of these PTMs, if present, in the course of characterization ... applications for synthesis of cholecystokinin-12 and bradykinin containing tyrosine sulfate [57], and could perhaps be applicable to synthesis of a-conopeptides Synthesis of variants of a-conotoxins:...

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Tài liệu Synthesis of Organometallic Compounds: A Practical Guide pdf

Ngày tải lên : 19/02/2014, 15:20

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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

Ngày tải lên : 21/02/2014, 01:21

... ([M + Na]+, 40%) Methyl 2,3-anhydro-a-D-allopyranoside (2a) and methyl 3,4-anhydro-a-D-galactopyranoside (2b) were obtained by desilylation of mmol of the 6-O-[dimethyl-(1,1,2-trimethylpropyl)silyl]-protected ... (ESI) m/z 229 ([M + Na]+, 100%) Synthesis of methyl (6E )-6,7-dideoxy-a-D-gluco-oct-6enopyranosiduronic acid (1g) and its methyl ester (1f) Methyl 2,3,4-tris-O-(trimethylsilyl)-a-D-gluco-hexodialdo1,5-pyranoside ... of the 2, 3, 4-OH groups, and (c) acid-catalysed removal of the 6-O-trityl group Oxidation of the free C-6 hydroxymethylene of to aldehyde with pyridinium chlorochromate, followed by Wittig methylenation...

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Tài liệu Báo cáo Y học: Dinucleoside polyphosphates stimulate the primer independent synthesis of poly(A) catalyzed by yeast poly(A) polymerase ppt

Ngày tải lên : 21/02/2014, 01:21

... methods Relative activity of GpnGs as effectors of the synthesis of poly(A) Based on the above results, the effect of several diguanosine polyphosphates on the synthesis of poly(A) was comparatively ... independent synthesis of poly(A) In order to understand why dinucleoside polyphosphates activated the primer independent synthesis of poly(A), the effect of 0.01 mM Gp4G or Ap4A on the synthesis of poly(A) ... presence of 0.02 mM [a-32P]ATP While conﬁrming the adenylylation of these compounds and the absence of synthesis of poly(A) by the E coli poly(A) polymerase, we did not observed adenylylation of guanosine,...

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Báo cáo khoa học: Heterologous synthesis of cytochrome c¢ by Escherichia coli is not dependent on the System I cytochrome c biogenesis machinery ppt

Ngày tải lên : 06/03/2014, 00:20

... Biogenesis of cytochrome c¢ Heterologous synthesis of PHCP by E coli The E coli System I cytochrome c biogenesis machinery, consisting of the Dsb and Ccm proteins, is responsible for the synthesis of ... database: (2) locus tag of Alvin_2765 of Allochromatium vinosum DSM180; (3) accession number P00138 of Achromobacter xylosoxidans NCIMB11015; (4) locus tag of RSP_0474 of Rhodobacter sphaeroides 2.4.1 ... in the absence of pEC86 not confer the cytochrome c biogenesis ability to the PH c552 protein This is possibly a result of the shortage of Ccm proteins, because the expression of ccm genes is...

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Environmental Goods and Services A Synthesis of Country Studies pot

Ngày tải lên : 07/03/2014, 08:20

... COM/ENV/TD(2004)10/FINAL Table Membership of key MEAs and dates of ratification, acceptance, approval or accession Vienna Convention for the Protection of the Ozone Layer Country Date of signature of MEA Montreal Protocol ... Services In Nicaragua, the Ministry of Environment and Natural Resources (MARENA) has an Office of Environmental Services that is in charge of identifying the benefits of trade in environmental goods ... determinants of demand, such as: the state of the economy; population and population growth; the state of the environment; and pressure from stakeholders, civil society and consumers in each of the...

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Báo cáo khoa học: Mycobacterium tuberculosis possesses a functional enzyme for the synthesis of vitamin C, L-gulono-1,4-lactone dehydrogenase doc

Ngày tải lên : 07/03/2014, 12:20

... characterization of l-gulonolactone oxidase from chicken kidney microsomes Biochemistry 21, 5076– 5082 14 Loewus FA (1999) Biosynthesis and metabolism of ascorbic acid in plants and of analogs of ascorbic ... ⁄ PAGE revealed the presence of one protein band of about 70 kDa (Fig 1, lane 2) The identity of the protein was confirmed by enterokinase treatment After digestion of the affinity-purified GSTtagged ... Characterization of the recombinant dehydrogenase of M tuberculosis L-gulono-1,4-lactone Fig Heterologous expression and purification of the recombinant L-gulono-1,4-lactone dehydrogenase (Rv1771) of M tuberculosis...

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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

Ngày tải lên : 07/03/2014, 12:20

... 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 ... maintains the 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 ... constructs were integrated into the leu2 locus of chromosome III of S cerevisiae strain W303a to yield the strain TOY1, and into the trp1 locus of chromosome IV of S cerevisiae strain W303a to yield the...

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Báo cáo khóa học: A single mutation that causes phosphatidylglycerol deﬁciency impairs synthesis of photosystem II cores in Chlamydomonas reinhardtii pdf

Ngày tải lên : 07/03/2014, 15:20

... epistasy of synthesis (CES) process [1], D1 and apoCP47 display concerted rates of synthesis In the absence of D1, the rate of synthesis of apoCP47 is strongly reduced, while the rates of synthesis of ... degradation or to their lower rate of synthesis When we studied the rates of synthesis of the individual PSII subunits by pulse-labelling experiments, we observed that synthesis of D1 and apoCP47 were barely ... mf1 and mf2 is due to a decreased synthesis of two PSII core subunits The strongly reduced accumulation of PSII could result from a defect in the synthesis of any of the major PSII core subunits...

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Báo cáo khoa học: "Analysis and Synthesis of the Distribution of Consonants over Languages: A Complex Network Approach" pptx

Ngày tải lên : 08/03/2014, 02:21

... 2005) are examples of such attempts The present work also uses the concept of complex networks to develop a platform for a holistic analysis as well as synthesis of the distribution of the consonants ... studies of PlaNet In section we provide a simplified theoretical explanation of the analytical results ob- Figure 1: Illustration of the nodes and edges of PlaNet tained In section we present a synthesis ... Degree distribution of PlaNet for the set VL The figure in the inner box is a magnified version of a portion of the original figure Degree Distribution of PlaNet The degree of a node u, denoted...

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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

Ngày tải lên : 08/03/2014, 08:20

... ampicillin Values of 47 ± mM for KNapp and of 3.6 ± 0.22 for (Vs/Vh)max for the synthesis of ampicillin were obtained from ﬁtting Eqn (8) to the data For synthesis of penicillin G, a value of 0.018 mM)1 ... reactive ester of NIPGB in kinetic experiments, failed because of the high rates of spontaneous hydrolysis of this compound The only substrate of PA for which the steady-state rate of hydrolysis ... analysis of penicillin acylase (Eur J Biochem 270) 3681 Fig Inhibition of NIPGB hydrolysis by 7-ADCA Lineweaver–Burk plot of the eﬀect of various concentrations of 7-ADCA on the conversion of NIPGB...

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Báo cáo "Another method of logic synthesis of digital counting circuits " pptx

Ngày tải lên : 14/03/2014, 13:20

... (8) (10) 61 Another method of logic synthesis of Obviously now the value of set E shows the complete parameters of periodical as well as frequency existence of forms of circuit functions (from ... 3) 59 Another method of logic synthesis of Table Circuit function with input state R3, of RS - FF - Counter with k = 6, = to 64, in which: P is the periodical existence of circuit function form ... same form Figure describes the appearance of form and form on axis Figure 3: Description of form and form on axis 57 Another method of logic synthesis of From figure we can see that if = 2,...

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Báo cáo khoa học: Post-translational modiﬁcations in the active site region of methyl-coenzyme M reductase from methanogenic and methanotrophic archaea potx

Ngày tải lên : 16/03/2014, 05:20

... Peptides containing N-methylhistidine, 5-methylarginine or 2-methylglutamine The methylated histidine (H257) was found in the a-subunit of MCRs from all methanogenic archaea and of the two MCRs from ... isolated from them for analysis of the presence of the thioxo peptide bond Methylated amino acids are found in many proteins, although the presence of 5-methylarginine and 2-methylglutamine has, until ... biosynthesis of methylated amino acids in the active site region of methyl- coenzyme M reductase J Biol Chem 275, 3755– 3760 ` 10 Boone DR, Whitman WB & Rouviere P (1993) Diversity and taxonomy of...

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A simple large scale synthesis of very long aligned silica nanowires

Ngày tải lên : 16/03/2014, 15:03

... production of large-quantities of high-purity (no metal catalysis contamination) and ultralong (millimeters) SiO2 nanowires (most of the wires have uniform diameters of $50 nm, while some of them ... produced by pyrolysis of mixture of Si and SiO powders Recently, Pan et al [8] have developed a molten gallium-catalyzed vapor–liquid– solid (VLS) process for the growth of bundles of highly aligned ... in the spectral range of 300–800 nm using a He–Cd laser with a wavelength of 325 nm as the excitation source Results and discussion After the synthesis, a large quantity of white wool-like product...

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Carbon assisted synthesis of silicon nanowires

Ngày tải lên : 16/03/2014, 15:04

... planes of silicon The crystallinity of the nanowires is considerably higher when only argon was used instead of a mixture of argon and hydrogen The role of hydrogen in promoting the amorphization of ... has a Y-shape, with arms of a uniform width of 200 nm, and a length of a few microns Careful studies of the TEM images and electron diﬀraction data may unravel the nature of the junction In Fig ... characteristic of cubic silicon with a small impurity of silica Reaction of silicon powder with activated carbon in the absence of H2 , by procedure (ii), yielded abundant quantities of SiNWs The...

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Polymer assisted synthesis of aligned amorphous silicon nanowires and their core shell structures with au nanoparticles

Ngày tải lên : 16/03/2014, 15:06

... edge of the scratched film, the orientation of the NWs is widespread over the whole substrate The homogeneous thickness of the NWs film is easily obtained to be about 500 lm Thus, the growth rate of ... thickness of 500 lm The low magnification TEM image in Fig 3a shows the general morphology of the SiNWs The diameters are in the range from several tens to hundreds of nanometers Most of them are ... 3b shows a TEM image of individual curly wire with the average diameter of 400 nm, revealing the typical structure of wire-like spherical particle agglomerates at the end of the wire Fig 3c shows...

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