pressure bar of aqueous sulfuric acid solutions
Báo cáo lâm nghiệp: "Effects of sulfuric acid and nitrogen deposition on mineral nutrition of Picea abies (L.) Karst" ppt
Ngày tải lên :
09/08/2014, 04:20
... Hantschel, 1987) using sulfuric acid of pH’s corresponding to the average proton of the canopy of various spruce stands of the Fichtelgebirge The equivalent fraction of Mg (% Mg of E K, Ca, Mg, Al) ... acidification of the rhizosphere resulting from enhanced cation uptake The acidification of the root microenviaffected root nutrient uptake (Schneider el al., 1989): fine root Ca content of acidically ... water (Table I) In the nutrient solution, we measured an increase of total acidity of about 60 peq per tree as a result of the acid treatment (Kaupenjohann et al., 1988) These findings confirm...
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Effect of unsaturated fatty acid esters of biodiesel fuels on combustion, performance and emission characteristics of a DI diesel engine
Ngày tải lên :
05/09/2013, 15:28
... Journal of Energy and Environment (IJEE), Volume 1, Issue 3, 2010, pp.411-430 421 % of Premixed combustion % of Diffusion combustion Trend line of % of diffusion combustion Trend line of % of premixed ... volume, JT 50:50 = Blend of 50 % of jatropha oil methyl ester and 50 % of tallow oil methyl ester by volume, SFCt 50:50 = Blend of 50 % of sunflower oil methyl ester and 50 % of coconut oil methyl ... Biodiesel of karanjia has a lower percentage of unsaturation and has a higher value of maximum heat release rate than those of sunflower biodiesel, but still has a lower value of peak pressure...
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Tài liệu Báo cáo khoa học: Looking for the ancestry of the heavy-chain subunits of heteromeric amino acid transporters rBAT and 4F2hc within the GH13 a-amylase family ppt
Ngày tải lên :
18/02/2014, 13:20
... lack of domain B protruding out of the TIM barrel in the place of loop connecting the b3-strand to the a3-helix [9,21] Sharing domain B by rBATs and GH13 enzymes, and especially the sequence of ... conserved sequence regions (CSRs) covering mainly the b-strands of the catalytic TIM barrel [3,11–13] Of the three GH families of the clan GH-H, it was the family GH13 that was originally established ... b-strands b2, b3, b4 and b8 of the (b ⁄ a)8 barrel domain, and for rBAT also with the short stretch near the C-terminus of domain B [9,19] From the sequence–structure point of view, the basic difference...
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Tài liệu Báo cáo khoa học: Purification and characterization of a sialic acid specific lectin from the hemolymph of the freshwater crab Paratelphusa jacquemontii pdf
Ngày tải lên :
21/02/2014, 00:20
... presence O-acetylsialic acid and agglutination ability of the De-O-acetylated preparation of glycoproteins De-Oacetylation of glycoproteins was performed following the procedures of Sarris and Palade ... [30] and Schauer [6] A solution of 750 lL of glycoprotein (5 mgÆmL)1) was added to 250 lL of 0.04 M of NaOH, vortexed, incubated on ice for 45 and neutralized with mL of 0.01 M HCl, respectively ... following the procedure of Lowry et al [32] Fig SDS/PAGE of purified lectin from the hemolymph of P jacquemontii A sample containing about 10 mg of protein from serum (A) and mg of BSM–agarose-purified...
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Tài liệu Báo cáo Y học: Evolution of the enzymes of the citric acid cycle and the glyoxylate cycle of higher plants pdf
Ngày tải lên :
22/02/2014, 04:20
... evolution of all of the enzymes of the pathway (Fig 4), it is clear that only about half of the enzymes of the tricarboxylic acid cycle, the major pathway of carbon metabolism in mitochondria of oxygen-respiring ... molecular mass of 90 kDa and are typically homodimers of 45-kDa subunits [44,45] In the presence of Mg2+, glyoxysomal CS of plants also forms tetramers [43] However, there are also a number of bacteria ... eukaryotes, all of the enzymes of the tricarboxylic acid cycle are encoded in the nucleus (A very similar situation exists for the Calvin cycle in plastids, where almost of the genes of this typically...
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Tài liệu Báo cáo Y học: Importance of the amino-acid composition of the shutter region of plasminogen activator inhibitor-1 for its transitions to latent and substrate forms pdf
Ngày tải lên :
22/02/2014, 07:20
... alignments of 219 serpins showed that residue 53 is a Ser in 92% of the cases; residue 56 is a Ser in 74% of the cases; residue 186 an Asn in 87% of the cases; and residue 334 a His in 80% of the ... respectively) of the very unstable variants Q334H and G56S/Q334H At the routinely used pH of 8.1, there is only a slight effect of vitronectin on the rate of latency transition of PAI-1 wild-type, ... most of the BSA and most of the excess of LMW-uPA The samples were then precipitated with trichloroacetic acid and subjected to SDS/PAGE in gradient gels with 6–16% polyacrylamide The positions of...
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Báo cáo khoa học: The catalytic mechanism of dye-decolorizing peroxidase DyP may require the swinging movement of an aspartic acid residue potx
Ngày tải lên :
06/03/2014, 00:20
... Asn171 of D171N-CN is shown as Asp171 To avoid misunderstanding, only the heme of the native is shown in white The position of the CN carbon mimics the position of the proximal oxygen of H2O2 ... characteristics of DyPs In the present study, we focused on elucidation of the catalytic mechanism, employing tertiary structural analysis Three X-ray crystal structures of members of the DyP-type ... ligand for heme iron On the basis of these analyses, we propose a new mechanism for the formation of compound I by DyP When H2O2 binds to the heme iron of DyP, OD2 of the catalytic residue Asp171...
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Báo cáo khoa học: New application of firefly luciferase ) it can catalyze the enantioselective thioester formation of 2-arylpropanoic acid docx
Ngày tải lên :
07/03/2014, 10:20
... Recovered acid (% ee) Thioester (% ee) 6 10 11 12 13 14 15 2-phenyIpropanoic acid 2-phenyIpropanoic acid 2-phenyIpropanoic acid Flurbiprofen Iburprofen Ketoprofen Ketoprofen Ketoprofen Naproxen ... the yield of recovered acid Yield of the recovered acid was determined by the reversed phase HPLC analysis in the presence of flurbiprofen as an internal standard ee of the recovered acid was determined ... the same as the case of 2-phenylpropanoic acid In the case of 2-hydroxymethylpropanoic acid (tropic acid) , which has a hydroxyl group on the methyl group of 2-phenylpropanoic acid, the thioester...
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Báo cáo khoa học: Stage specific expression of poly(malic acid)-affiliated genes in the life cycle of Physarum polycephalum Spherulin 3b and polymalatase potx
Ngày tải lên :
07/03/2014, 12:20
... have been unsuccessful because of loss of synthetic activity during rupture of plasmodia in the preparation of extracts [15] The PMLA synthetic capacity of plasmodia of the yellow strains such as ... suppression of PMLA synthesis Among other possibilities, this effect on PMLA synthesis could be the result of loss of induction at the transcriptional level, of loss of activation of the synthetase ... bc-crystallins (Fig 2) The total number of amino acids is 103, correlating with a calculated molecular mass of 11271.5 and a theoretical isoelectric point of 4.88 Because of the high similarity, the polypeptide...
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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
... catalyzes the formation of UDP-Xyl from UDPGlcA via decarboxylation of the C6-carboxylic acid component of glucuronic acid (Fig 1) Moreover, UDP-GlcA can also be generated by oxidation of myoinositol ... 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 ... 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 acid...
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Báo cáo khoa học: Molecular dynamics structures of peptide nucleic acidÆDNA hybrid in the wild-type and mutated alleles of Ki-ras proto-oncogene ppt
Ngày tải lên :
07/03/2014, 21:20
... N-termini of the PNA are considered as equivalent to 3¢ and 5¢ ends of a nucleic acid chain, respectively Results For convenience of discussion, and to be consistent with the strategy of designing of ... sources of stabilization of nucleic acid duplexes, their comparison, especially in the vicinity of the mismatch in PDwt compared with DDwt duplex may give clues towards deciphering the origin of the ... interaction of A6 with either the six-member ring of T7 or through the methyl group and ⁄ or O4 of T7 Thus, base stacking prevails at the AC(6–7) step (Fig 2A) of PDwt, and the AT(6–7) step of PDmut...
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Báo cáo Y học: Concerted regulation of free arachidonic acid and hormone-induced steroid synthesis by acyl-CoA thioesterases and acyl-CoA synthetases in adrenal cells pdf
Ngày tải lên :
08/03/2014, 09:20
... 269) 5603 Fig Effect of NDGA on recombinant thioesterase activity Activity of recombinant CTE-I (open bars) and MTE-I (filled bars) was measured in the presence of increasing doses of NDGA Acyl-CoA ... proposed the name arachidonic acidrelated thioesterase involved in steroidogenesis (ARTISt) for p43 [32] Recently, the expression and the activity of different isoforms of acyl-CoA synthetases was ... inhibitor of the AA-CoA synthetase Our results are consistent with the involvement of an acyl-CoA synthetase and an acyl-CoA thioesterase as important regulators of AA release in the mechanism of action...
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Báo cáo Y học: Binding of Thermomyces (Humicola) lanuginosa lipase to the mixed micelles of cis-parinaric acid/NaTDC Fluorescence resonance energy transfer and crystallographic study ppt
Ngày tải lên :
08/03/2014, 23:20
... spectra of this fatty acid (Fig 2) This spectroscopic property of cis-PnA is probably associated with the transformation of cis-PnA aggregates into mixed micelles of cis-PnA/NaTDC The presence of ... the lack of a hydroxyl group of Ser146 diminishes the role of this residue in the stabilization of the substrate– ligand molecule, leading to the ÔconfusionÕ of the enzyme in the process of the ... composed of all the atoms of all the residues between E1 and L269 in the case of molecule A (chain A) and molecule ˚ B (chain B), with a rmsd of 0.17 A between the corresponding Ca atoms of molecule...
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Báo cáo khoa học: Optimization of D-amino acid oxidase for low substrate concentrations – towards a cancer enzyme therapy pdf
Ngày tải lên :
16/03/2014, 02:20
... estimation of the spectra of intermediates, of rate constants, and of the concentration of intermediates as a function of time The same program was used to simulate kinetic processes [35] Of relevance ... incubation using 10 mU of wt-DAAO (white bars), Q144R-DAAO (gray bars), and m-DAAO (black bars) (C) Comparison of cytotoxicity observed using the indicated DAAO forms in the presence of 20 mM D-Ala [conditions ... respectively (B) Dependence of the rate of the observed first phase of anaerobic reduction (kobs1) for wt-DAAO (o) and m-DAAO (h) on the concentration of D-Ala The line represents the fit of the wt-DAAO data...
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Báo cáo khoa học: Discovery of GSK837149A, an inhibitor of human fatty acid synthase targeting the b-ketoacyl reductase reaction pot
Ngày tải lên :
16/03/2014, 06:20
... inhibitor of human fatty acid synthase Enzymatic mode of inhibition Table Summary of inhibition patterns caused by GSK837149A on the KR reaction catalyzed by FAS With the aim of nding the mode of inhibition ... inhibitor of fatty acid synthase Proc Natl Acad Sci USA 97, 34503454 Rendina AR & Chend D (2005) Characterization of the inactivation of rat fatty acid synthase by C-75: inhibition of partial ... composed of individual monofunctional proteins, each of which catalyzes one individual reaction Whereas type I FAS produces only palmitate or stearate, type II FAS is able to synthesize fatty acids of...
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Báo cáo khoa học: Structural and functional consequences of single amino acid substitutions in the pyrimidine base binding pocket of Escherichia coli CMP kinase pdf
Ngày tải lên :
16/03/2014, 10:20
... from the distal point of the rest of the protein Such a dipole will have weak interactions with the rest of the protein Thus, if turned off (by removal of Arg and protonation of Asp185), the protein ... of microgram quantities of protein utilizing the principle of proteindye binding Anal Biochem 72, 248254 30 Laemmli UK (1970) Cleavage of structural proteins during the assembly of the head of ... reaction Analysis of the effect of the mutations on protein stability revealed three distinctive mechanisms of relaxation, and in the case of S36A, no relaxation at all The rst type of relaxation...
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Evaluation of Current RDF Database Solutions ppt
Ngày tải lên :
16/03/2014, 16:20
... space 5.5 Sesame The software producer of Sesame37 is Aduna38 This company sets the focus of their work in revealing the meaning of information Sesame was started as a prototype of the EU project ... be provided The mode of operation of the test suite is based on a use–case taken from real life An automtic execution of miscellaneous queries is imitating the behavior of human operators Lehigh ... part of the further evaluation Based on the evaluation in [7] the achieved evaluation of ARC, Redland and Virtuoso are insufficient, thus a further examination of these databases is not part of this...
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Báo cáo khoa học: Characterization of D-amino-acid-containing excitatory conotoxins and redefinition of the I-conotoxin superfamily pot
Ngày tải lên :
16/03/2014, 22:20
... case of r11c, however, seven out of 12 amino acids at the C-terminus of r11a are not conserved, including the amino acid to be modified (Phe in the case of r11a compared with Leu in the case of ... Two versions of both peptides were produced, one with all l-amino acids and the second with a single d-amino acid at the locus homologous to d-Phe44 of r11a, i.e d-Phe at position 44 of r11b and ... of the I-gene superfamily of conotoxins provides a potentially much more diverse sequence database in which to explore the factors required for epimerization of an l-amino acid to a d-amino acid...
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A study on English varieties Some related problems facing Vietnamese learners of English and suggested solutions
Ngày tải lên :
17/03/2014, 16:47
... rough unit of distance derived from the length of the same ―Office‖ - BE- a government department ("Colonial Office", "Foreign and CommonwealthOffice") the outbuildings and dependencies of a dwelling ... helps of native speakers V DESIGN OF THE STUDY This study is divided into three parts of which the second one is the most important The first part named INTRODUCTION, consists of Rationale, Aims of ... distinctive characteristics of regional accents, see Regional accents of English, and for the more distinctive characteristics of regional dialects, see List of dialects of the English language Within...
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physical properties of aqueous suspensions of goethite nanorods
Ngày tải lên :
20/03/2014, 13:06
... in too acidic conditions For our experiments, samples of various concentrations were prepared by dilution from the synthesis batch with solutions of nitric acid at pH = The ionic strength of the ... study of ferrofluid suspensions [34a,43], the birefringence and the magnetization of a suspension of goethite particles can be B.J Lemaire et al.: Physical properties of aqueous suspensions of goethite ... very important for the interpretation of the magnetic behaviour of goethite suspensions B.J Lemaire et al.: Physical properties of aqueous suspensions of goethite (α-FeOOH) nanorods (Part I)...
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