chemical synthesis of the core oligosaccharide of bacterial lipopolysaccharide
Báo cáo khoa học: Structure of the core oligosaccharide of a rough-type lipopolysaccharide of Pseudomonas syringae pv. phaseolicola docx
Ngày tải lên :
23/03/2014, 13:20
... well as of the full core oligosaccharide of P syringae pv phaseolicola GSPB 711 (Fig 5) The structure of the P syringae LPS core is similar but not identical to that of other members of the genus ... Elucidation of the structure of ¨ the lipopolysaccharide core and the linkage between the core and the O-antigen in Pseudomonas aeruginosa immunotype using strong alkaline degradation of the lipopolysaccharide ... isomeric outer core glycoforms differing in the postion of a terminal Rha residue occurs in the P aeruginosa LPS [30], one of them being markedly similar to the Rha-containing glycoform of the P syringae...
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Báo cáo khoa học: The oxidative effect of bacterial lipopolysaccharide on native and cross-linked human hemoglobin as a function of the structure of the lipopolysaccharide A comparison of the effects of smooth and rough lipopolysaccharide ppt
Ngày tải lên :
08/03/2014, 10:20
... concentration of oxyHb with time was utilized as a measure of the rate of oxidation of oxyHb RESULTS The effect of pH on the auto-oxidation of cross-linked Hb was studied The rate of decrease of the concentration ... in the absence and presence of EDTA, on the oxidation of Hb A0 The mean ± SD of three independent experiments is shown Other conditions as in Fig Our studies of the effect of the structure of the ... comparison of the effects of rough and smooth LPSs of E coli, both in the presence and absence of EDTA (Fig 1) The rate of oxidation was increased in the presence of the LPSs of both the smooth...
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Báo cáo hóa học: " Chemical Synthesis of PEDOT–Au Nanocomposite" pptx
Ngày tải lên :
22/06/2014, 18:20
... hmax The average size of the Au particles calculated from the width of the diffraction peak according to the Scherrer equation is *50 nm Figure shows the FT-IR spectrum of the PEDOT film together ... incorporation of gold XRD pattern of PEDOT nanoparticle showed the amorphous nature of the material The diffraction features of the Au-incorporated PEDOT shows standard cubic phase of Au The broadening of ... state of PEDOT In the case of Au-incorporated polymer matrix, the intensity increases due to the doping of Aunano within the polymer matrix Figure shows the Raman spectrum of PEDOT along with the...
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Báo cáo khoa học: Total chemical synthesis and NMR characterization of the glycopeptide tx5a, a heavily post-translationally modified conotoxin, reveals that the glycan structure is a-D-Gal-(1fi3)-a-D-GalNAc pot
Ngày tải lên :
23/03/2014, 13:20
... that even in the synthesis of nondisulfide bridge-containing glycopeptides the yield is dramatically affected by the scale of the reaction, the excess of amino acids used, and the level of purity ... with the calculated monoisotopic [M-2CO2-H]– mass of 1840.42 Da) The mass shift of Da (MR ) M) confirms the formation of the two disulfide bridges However, comparison of the retention times of the ... the efficiency of the coupling reactions In order to scale up the automated synthesis to the same level as the manual synthesis (280 lmol) we carried out nine separate automated syntheses Each dried...
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Báo cáo hóa học: " A Temperature Window for the Synthesis of Single-Walled Carbon Nanotubes by Catalytic Chemical Vapor Deposition of CH4 over Mo2-Fe10/MgO Catalyst" pptx
Ngày tải lên :
22/06/2014, 00:20
... study the influence of growth temperature on the purity of prepared tube samples, we give the curve (Fig 4) showing the dependence of ID/IG on the growth temperature From Fig 4, two kinds of ID/IG ... accords with the result of the TEM image (Fig 3a) The intensity ratio, ID/IG, is observed to decrease with increasing temperature (at 800 °C, the ID/IG is 0.47) Raman spectrum of the sample grown ... cm-1 (the fundamental E2g mode of graphite) are presented In the lower wavenumber region (100–300 cm-1), the radial breath modes (RBM) which represent the existence of SWCNTs are hardly shown The...
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Báo cáo hóa học: " Synthesis of Aqueous CdTe/CdS/ZnS Core/shell/shell Quantum Dots by a Chemical Aerosol Flow Method" pot
Ngày tải lên :
22/06/2014, 00:20
... kinds of core/ shell QDs and S precursor in the second part can form a shell of ZnS on the outside of CdTe/CdS QDs The core/ shell/shell structure was further confirmed by XRD (Fig 4a) In the XRD ... microdroplets, carried into the furnace by the 1.5 L/min N2 flow CdTe/CdS core/ shell quantum dots were directly formed in the furnace Then, at the end of the furnace, the CdTe/CdS QDs flowed into ... integrated apparatus, the continuous synthesis method makes it possible to realize large-scale synthesis of QDs with core/ shell/shell structure In our experiment, the rate of production can reach...
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THE LOGIC OF CHEMICAL SYNTHESIS
Ngày tải lên :
25/08/2016, 15:29
... knowledge of chemical sciences (both fact and theory) has grown so has the power of synthesis The synthesis of carbogens now includes the use of reactions and reagents involving more than sixty of the ... finding syntheses is made is Section 1.8 The successful synthesis of a complex molecule depends upon the analysis of the problem to develop a feasible scheme of synthesis, generally consisting of a ... retron for the Diels-Alder transform, the application of that transform to to generate synthetic precursor is straightforward The problem of synthesis of is then reduced retrosynthetically to the simpler...
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THE LOGIC OF CHEMICAL SYNTHESIS
Ngày tải lên :
25/08/2016, 15:51
... collection of readily disconnected building blocks Most of the early syntheses of “organic” chemistry were worked out by this mapping-disconnection approach The first commercial synthesis of cortisol ... another example of a not-so-obvious SM-goal which proved useful.30 OH EtO2C CO2Et O H 104 (±)-Cedrol (103) The example given above of the selection of deoxycholic acid as a SM for the synthesis ... ring, the number of connections to the major skeleton and the location of the ring within the molecule Even when there is an advantage in disconnecting a ring, the precise nature of such a disconnection...
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THE LOGIC OF CHEMICAL SYNTHESIS
Ngày tải lên :
12/10/2016, 10:49
... APPROACHES TO THE ANALYSIS OF COMPLEX SYNTHETIC PROBLEMS PREFACE The title of this three-part volume derives from a key theme of the book the logic underlying the rational analysis of complex synthetic ... theory) has grown so has the power of synthesis The synthesis of carbogens now includes the use of reactions and reagents involving more than sixty of the chemical elements, even though only ... finding syntheses is made is Section 1.8 The successful synthesis of a complex molecule depends upon the analysis of the problem to develop a feasible scheme of synthesis, generally consisting of a...
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Chemical neurolysis in the management of muscle spasticity
Ngày tải lên :
01/11/2013, 10:20
... injection, the treatment effect is often enhanced by the additional infiltration of the proximal third of the muscle The superficial placement of the injection may result in the denervation of the gracilis ... and width of the muscle are then determined The block is made in the medial part of the muscle near the vertebral body avoiding the lumbar and femoral arteries The therapeutic effects of chemical ... position, the inferior pole of the kidney and the psoas muscle are identified from Chemical neurolysis in the management of muscle spasticity the back with the ultrasound probe at the level of L1– L4 The...
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Tài liệu The New Generation of Microsoft Certifications: What’s at the Core? pdf
Ngày tải lên :
17/01/2014, 06:20
... Microsoft currently offers two Professional series credentials, the Microsoft Certified IT Professional (MCITP) and the Microsoft Certified Professional Developer (MCPD) Microsoft Certified IT Professional ... Microsoft Office Live Communications Server 2005 • Technology Specialist: Microsoft Windows Mobile 5.0 Applications The Professional Series (MCITP/MCPD) The Professional Series credentials are the ... certifications So, what are these all about and why is there a new generation of credentials? One of the problems today is that there are an abundance of credentials in the IT world, making it increasingly...
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Tài liệu The New Generation of Microsoft Certifications: What’s at the Core? pptx
Ngày tải lên :
17/01/2014, 09:20
... Microsoft currently offers two Professional series credentials, the Microsoft Certified IT Professional (MCITP) and the Microsoft Certified Professional Developer (MCPD) Microsoft Certified IT Professional ... Microsoft Office Live Communications Server 2005 • Technology Specialist: Microsoft Windows Mobile 5.0 Applications The Professional Series (MCITP/MCPD) The Professional Series credentials are the ... certifications So, what are these all about and why is there a new generation of credentials? One of the problems today is that there are an abundance of credentials in the IT world, making it increasingly...
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Tài liệu Báo cáo khoa học: Interruption of triacylglycerol synthesis in the endoplasmic reticulum is the initiating event for saturated fatty acid-induced lipotoxicity in liver cells pdf
Ngày tải lên :
14/02/2014, 22:20
... inhibition of ER stress When the available acyl-CoAs are in excess, they are channeled towards TAG synthesis The main findings of the present investigation were the observations that TAG synthesis ... TAG synthesis It is suggested that the creation of a pool of oversaturated lipid intermediates makes these molecules inaccessible to the enzymes of TAG synthesis, whereas a certain degree of unsaturation ... phosphorylation of JNK when the two agents were coadministered (Fig 4C) Taken together, these results indicate that the location of the protective action of oleate was upstream of ER stress activation Whether...
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Tài liệu Báo cáo khoa học: Understanding the binding properties of an unusual metal-binding protein ) a study of bacterial frataxin pdf
Ngày tải lên :
18/02/2014, 16:20
... (B) Details of the superimposition of the hydrophobic core of CyaY (blue) and CyaY–Eu complex (red) The side chains of the CyaY C-terminus rearrange as a longrange effect of binding The figure was ... disappearance of specific resonances without the concomitant appearance of other signals in other parts of the spectrum This result could be a consequence of the paramagnetic properties of Fe(II), ... induce a line ˚ broadening of 1–100 Hz in nuclei located within A of the binding site, depending on the molecular mass of the protein and the strength of the magnetic field The only exceptions are...
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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
... identification of the correctly disulfide-bonded synthetic isomer Peptide synthesis Chemical synthesis strategies The small size (10–25 amino acids) of a-conotoxins has made chemical synthesis the preferred ... identification of the PTM is usually confirmed by synthesis of the modified a-conotoxin and comparison with the natural peptide Identification of the nature of the C-terminus The identification of C-terminal ... replication of natural conotoxins, the standard synthesis procedures described above have been applied for strategies requiring synthesis of specific variants of conotoxins The synthesis of alanine...
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Tài liệu Báo cáo khoa học: Phylogenetic relationships in class I of the superfamily of bacterial, fungal, and plant peroxidases pptx
Ngày tải lên :
19/02/2014, 16:20
... discrepancy between the rather high GC content of proteobacterial KatGs and the GC content of the whole organism (Table 2), supporting the hypothesis on the direction of the lateral gene transfer ... supported the role of the catalytic triad by affecting the typical reactivity The level of decrease in the peroxidase activity (in contrast with catalase activity) correlated with the ability of the ... Even though the C-domains of the catalase–peroxidases had lost the ability to bind the prosthetic heme group, the structural elements remained conserved In addition, in the N-domains of the catalase-peroxidases,...
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Tài liệu Báo cáo khoa học: Template requirements and binding of hepatitis C virus NS5B polymerase during in vitro RNA synthesis from the 3¢-end of virus minus-strand RNA docx
Ngày tải lên :
20/02/2014, 01:20
... deletion mutants of the 3¢ terminus of the minus-strand RNA but deletions were made on the basis of the structure of the 5¢UTR of the plus-RNA, the structure of the 3¢-end of the minusstrand RNA ... in the SL-A1 or the SL-B1 stem loop allowed synthesis of a major RNA product with the size of the input template (Fig 4A) No arrest bands were observed during the synthesis with the exception of ... that the deletions or the base changes did not alter the structure of the other domains of the (–)IRES RNA as determined by predicted secondary structure with RNA Draw software The structure of the...
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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
... to the theoretical model and in the subsequent simulations [22] the corresponding ratios were KI2/KS2 ¼ and KI1/ KS1 ¼ 0.7 These values and the transition of the Eadie– Hofstee plot from the ... ([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 ... [15] The key step is the use of Collins reagent for the selective oxidation of the primary trimethylsilyl ether of the fully silylated monosaccharide to an aldehyde (step ii) The resulting 2,3,4-tris-trimethylsilylated...
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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
... 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 studied The enzyme ... 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) ... diguanosine tetraphosphate (Gp4G), in the 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,...
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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
... that of the mature protein The sequence of PHCP was chemically determined up to the 30th residue in this study and confirmed by the protein sequence deduced from the cloned gene The stretches of the ... The arrow and arrowhead indicate the positions of the PHCP and PH c552 proteins, respectively The band denoted by the asterisk on the right-hand side is the result of nonspecific staining of the ... 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...
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