preparation and properties of a si¸c1 x h
Báo cáo khóa học: Localization, purification and properties of a tetrathionate hydrolase from Acidithiobacillus caldus pot
Ngày tải lên :
07/03/2014, 14:20
... sulfate with the HPLCassay of tetrathionate was also tested The height of the tetrathionate peak decreased and a shoulder appeared in the HPLC-chromatograms as the ammonium sulfate concentration ... neutralization of the overall negative charge in the periplasm of the acidophilic A caldus cells As in A caldus, tetrathionate hydrolase is periplasmic also in A thiooxidans [19], A ferrooxidans [21] and A ... thiooxidans [19], A ferrooxidans Funis 2–1 [20], A ferrooxidans [21] and A acidophilum [22] In the case of A ferrooxidans [21] and A acidophilum [22], the activity of the tetrathionate hydrolase...
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Báo cáo khoa học: Purification and properties of a new S-adenosyl-Lmethionine:flavonoid 4¢-O-methyltransferase from carnation (Dianthus caryophyllus L.) pot
Ngày tải lên :
08/03/2014, 08:20
... components of each reaction mixture, after their chromatographic separation and purification, were submitted to 1H NMR (nuclear magnetic resonance) and FABMS (fast atom bombardment mass spectrum) analyses ... obtained solution was concentrated to mL as already described Ion-exchange chromatography on Q-Sepharose The mL samples were applied to a Hi-Trap Q Sepharose XL · mL (anion exchanger), prepacked ... and was eluted with the same solvent at a flow rate of 0.5 mLÆmin)1 The enzyme molecular mass was then re-checked through flatbed PAGE, using a PhastSystemTM (Amersham) electrophoresis system and...
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preparation and properties of magnetic iron oxide nanotubes
Ngày tải lên :
20/03/2014, 13:06
... nanotubes and (b) high magnification TEM image of a nanotube in sample S1 together with the creation of cation vacancies and the addition of oxygen atoms At the surface the Fe2+ cations were oxidized ... obvious change in the length and diameter of the nanotubes Comparison of the TEM images of the three samples indicates that the Fe3 O4 and ␥-Fe2 O3 nanotubes are conglomerated with each other, while ... by XPS, and the phosphate is not a magnetic material From Fig 5, both the two samples have a Mr/Ms value between 0.1 and 0.5, indicating that they may possess the magnetic properties of SD and...
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Báo cáo hóa học: " Preparation and properties of copper-oil-based nanofluids" ppt
Ngày tải lên :
21/06/2014, 03:20
... stability of the nanofluids are also investigated Experimental Materials and preparation of ligand All the materials and solvents used in this study, P2S5, cetyl alcohol, anhydrous ammonia, benzene, ... cupric acetate, ethanol, sodium hypophosphite, hydrazine hydrate solution (85%), toluene, decahydronaphthalene, and dichloromethane were analytic grade agents The Cu nanoparticles were prepared and ... ligand, ammonium (O, O)-dialkyldithiophosphate, was then precipitated and recrystallized in benzene, washed with absolute ethyl ether, and dried in vacuum Preparation and characterization of Cu nanoparticles...
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báo cáo khoa học: " Preparation and properties of the specific anti-influenza virus transfer factor" pot
Ngày tải lên :
11/08/2014, 20:20
... examination of STF, YW joined the preparation of STF, XL participated the examination of STF, SL and YZ also joined working on examinations of STF All authors have read and approved the final ... would be examined by the method of phenylphenol reagent reaction according to standard curve drawn with the sample of RNA bought from the Sigma [3] and calculated through a formula as follows: ... antigenspecific “.Similarly, transfer factors that are obtained from a host that has been infected with a certain pathogen are pathogenspecific Transfer factors are another noncellular part of...
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Tài liệu Báo cáo " Preparation and characteristics of LiF:Mg,Cu,Na,Si thermoluminescent material " pptx
Ngày tải lên :
13/02/2014, 04:20
... appeared in the range of 227-247 o C and the ratio of the height of the main peak to that of the other small peaks is rather great In order to obtain high sensitive LiF:Mg,Cu,Na,Si TL powder, the optimum ... usually used in dosimetry appears at 247 o C and the other small peaks are at 150, 205, and 280 o C Comparing the glow curves shown in Fig 2, one can note that the ratio of the height of the main ... intervals: a) 10, b) 20, c) 30, and d) 40 After annealing process, the powder was stuck together and had the same blue-green colour as that of CuCl2 The higher Cu concentration was, the colour was...
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Tài liệu Báo cáo Y học: Antibacterial and antifungal properties of a-helical, cationic peptides in the venom of scorpions from southern Africa pptx
Ngày tải lên :
21/02/2014, 15:20
... venom of Opistophtalmus carinatus, a scorpion living in southern Africa, and we have made a comparative analysis of the primary structures of all amphipathic a- helical poreforming peptides isolated ... for those differences are also situated mainly in the 21–27 fragment of amino acids A high hydrophobicity and a high hydrophobic moment both have previously been related to a high activity against ... more antibacterial than dermaseptin (34 amino acids) [19], peptides consisting of amino acids 7–22 of parabutoporin (an a- helical part having the four amino acids LAKK identical to mastoparan) and...
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Báo cáo khoa học: Crystal structure and enzymatic properties of a bacterial family 19 chitinase reveal differences from plant enzymes pdf
Ngày tải lên :
07/03/2014, 11:20
... chitinases have catalytic domains that are at least as large as those of the plant enzymes and that may contain at least six subsites [26,30] However, the catalytic 4894 domains of ChiG, ChiC and ... other hand, ChiG showed activity against a- chitin and b-chitin (supplementary Fig S2), chitooligosaccharides (Figs and 3), carboxymethyl-chitin–remazol–brilliant violet (CM-chitin RBV) and also ... consisting of a catalytic domain and an N-terminal chitin-binding domain ChiG, on the other hand, lacks this chitin-binding domain, and consists only of a catalytic domain [22] The chiG gene encodes a...
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Báo cáo khoa học: Dissociation/association properties of a dodecameric cyclomaltodextrinase Effects of pH and salt concentration on the oligomeric state pot
Ngày tải lên :
07/03/2014, 12:20
... GAGAAGCGCTGGATG-3Â (forward) and 5Â-CATCCAG CGCTTCTCAACACCCT GCTGCAGCAGA-3Â (reverse); for the H5 39V mutant, 5Â-CGACAAGGCGGGCGTC ACGTTA ACGCTGCCTGTCC-3Â (forward) and 5Â-GG ACAGGCAGCGTTAACGTGACGCCCGCCTTGTCG-3Â ... capability of the N- and C-terminal regions of the enzyme to form a dodecamer at pH 7.0 and a dimer at pH 6.0 Crystallography of CDase I-5 has shown that a histidine residue in the C-terminal region (H5 39) ... calculating the peak area during the dissociation process The rate of change in the peak area shown in Fig 3A was estimated according to an equation of single exponential decay [7], peak areaịt...
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Báo cáo khoa học: Ligand binding and antigenic properties of a human neonatal Fc receptor with mutation of two unpaired cysteine residues docx
Ngày tải lên :
16/03/2014, 06:20
... I-related receptor consisting of a heavy chain (HC) with three ectodomains (a1 , a2 and a3 ), a transmembrane part and a short intracellular signaling tail Like MHC class I HC, the FcRn counterpart ... (Fig 7D) Affinity measurements were also performed using a preparation of the shFcRn mutant where the N-terminal hexa-histidine tag (HAT-tag) was removed, and the resulting data exclude the possibility ... Sundaresan G, Subbarayan M, Carter NH, Ikle DN, Yazaki PJ, Chatziioannou AF, Gambhir SS et al (2005) Tailoring the pharmacokinetics and positron emission tomography imaging properties of anti-carcinoembryonic...
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synthesis, electrical measurement, and field emission properties of a-fe2o3 nanowires
Ngày tải lên :
20/03/2014, 13:08
... taken at a ?10 V bias on a single NW The tip used for CAFM was an Au-coated silicon tip, with a diameter of about 50 nm The morphology image of the NW shows that the diameter of the NW was larger ... density of the NWs per cm2 b Rtotal: the resistance of the total NWs in a unit cm2 Fig A schematic graph of the formation of the a- Fe2O3 NWs in thin and thick iron Fig (a) Schematic illustration and ... than that observed by SEM, which was due to the large diameter of the scanning tip From the current image taken at a ?10 V bias, the bright zone indicates that a current appeared on the tip of...
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Báo cáo Y học: Purification and catalytic properties of a CO-oxidizing:H2-evolving enzyme complex from Carboxydothermus hydrogenoformans doc
Ngày tải lên :
23/03/2014, 21:20
... from the gas phase were withdrawn, and H2 was quantified after separation by gas chromatography One unit of H2 formation activity is defined as lmol of H2 produced The gas chromatograph (model Carlo ... which have homologues in complex I Other members of this class of multisubunit membranebound [NiFe] hydrogenases are Eha and Ehb hydrogenases from the methanogenic archaeon Methanothermobacter marburgensis ... intact [18] The characterization of a mutant strain lacking Ech hydrogenase has led to the elucidation of the physiological function of this hydrogenase in M barkeri [24] The thermophilic Gram-positive...
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Báo cáo khoa học: Preparation and characterization of geodin A bc-crystallin-type protein from a sponge pot
Ngày tải lên :
30/03/2014, 15:20
... Giancola C & Graziano G (1993) THESEUS: a new software package for the handling and analysis of thermal denaturation data of biological macromolecules J Thermal Anal 38, 2779–2790 37 Kraulis PJ ... dependence of the native state heat capacity [20] A buffer vs buffer scan was subtracted from each peak The denaturation enthalpies, DH0(Tm), were obtained by integrating the area under the heat capacity ... findings (Table 1) suggest that the stability of geodin in urea resembles that of protein S rather than that of a mammalian crystallin such as cS-crystallin, a qualitative, indirect indication of a closer...
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Báo cáo hóa học: " Nanomechanical properties of a-synuclein amyloid fibrils: a comparative study by nanoindentation, harmonic force microscopy, and Peakforce QNM" potx
Ngày tải lên :
21/06/2014, 04:20
... 4A, B) and in air (Figure 4C, D) These images were obtained with a high setpoint of around 15 nN and show that for both liquid and ambient conditions the height and elasticity ranges which can ... information, but they are heavily suppressed and are difficult to measure [21,24] In HarmoniX, a torsional cantilever with the tip positioned off-axis solves this problem and acts as a high bandwidth ... increased data throughput [18-20] Two commercially available approaches are PeakForce QNM and Harmonic force microscopy or HarmoniX (Veeco, Santa Barbara, CA, USA) PeakForce QNM is based on the force-volume...
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Báo cáo hóa học: "Preparation and characterization of carbon nanofluid by a plasma arc nanoparticles synthesis system" pot
Ngày tải lên :
21/06/2014, 04:20
... is the TEM photograph for the edge of carbon nanoparticles The thickness of carbon nanoparticles is much smaller than its length and width in the photographs Overall, the shape of these nanoparticles ... it can be found that the viscosity of carbon/water nanofluid is much higher than that of the water When the carbon/water nanofluid was applied to heat exchange, pressure drop of pipeline and ... nanoparticles in nanofluids Powder Technol 2008, 186:145 Ananda Kumar S, Shree Meenakshi K, Narashimhan BRV, Srikanth S, Arthanareeswaran G: Synthesis and characterization of copper nanofluid by a novel...
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báo cáo hóa học:" Structural and optical properties of a radio frequency magnetron-sputtered ZnO thin film with different growth angles" pdf
Ngày tải lên :
21/06/2014, 17:20
... alignment and drafted the manuscript K-HK and MP carried out the sample preparation JL and H- SH performed data acquisitions and analysis All authors read and approved the final manuscript Average (400~800 ... the transmittance patterns of ZnO films with different growth angles All ZnO films show high transmittance above 90% The The 0° angled columnar film has the highest transmittance, and the value ... rays The ZnO film with a 0° growth angle has the lowest reflectance of 10.81% at 418 nm The 15° angled film has the best condition on average and low values The transmittance and reflectance are...
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Báo cáo hóa học: " Synthesis, Electrical Measurement, and Field Emission Properties of a-Fe2O3 Nanowires" potx
Ngày tải lên :
22/06/2014, 01:20
... taken at a ?10 V bias on a single NW The tip used for CAFM was an Au-coated silicon tip, with a diameter of about 50 nm The morphology image of the NW shows that the diameter of the NW was larger ... density of the NWs per cm2 b Rtotal: the resistance of the total NWs in a unit cm2 Fig A schematic graph of the formation of the a- Fe2O3 NWs in thin and thick iron Fig (a) Schematic illustration and ... than that observed by SEM, which was due to the large diameter of the scanning tip From the current image taken at a ?10 V bias, the bright zone indicates that a current appeared on the tip of...
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Báo cáo hóa học: " Research Article Monotonic and Logarithmically Convex Properties of a Function Involving Gamma Functions" pdf
Ngày tải lên :
22/06/2014, 02:20
... Germany, 1966 M Abramowitz and I A Stegun, Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, vol 55 of National Bureau of Standards Applied Mathematics Series, ... Lemma 2.4 and 2.25 we obtain ∂p x, y x
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Báo cáo hóa học: " Preparation and Characterization of Nano structured Materials from Fly Ash: A Waste from Thermal Power Stations, by High Energy Ball Milling" potx
Ngày tải lên :
22/06/2014, 18:20
... utilization of fly ash and with understanding of potential environmental and health impacts associated with its disposal by land filling In this paper an attempt has been made to modify the fly ash ... work of adhesion of fresh as well as ball milled fly ash in water and formamide These parameters have been extensively used to understand the surface characteristics of the materials [15] The total ... ash Also the surface of the fly ash has changed from glassy smooth to irregular and rough The outer glassy finish of the fresh fly ash may have been eroded during ball milling and the inner crystalline...
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