shimizu t nakata y and saito y 1985 electron microscopy and diffraction studies of the structure of amorphous wo3 film japan j appl phys 24 117 120

DSpace at VNU: Structural, magnetic, Mossbauer and magnetostrictive studies of amorphous Tb(Fe0.55Co0.45)(1.5) films

Ngày tải lên : 16/12/2017, 03:30

... shift and the hyperfine field However, due to the poor statistics, the spectra were fitted only with a distribution of hyperfine fields The fine structure of the fitted spectra is probably due to ... are stronger than those in the ‘pure’ a-RFe and a-RCo alloys This was thought to be the reason for the closing of the cone type distribution of (Tb, Dy) moments, then the enhancement of the R ... between the incident γ -ray direction (being the direction normal to the film) and that of the hyperfine field Bhf (or the Fe magnetic moment direction) is estimated from the line-intensity ratios...

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DSpace at VNU: Magnetic, Mossbauer and magnetostrictive studies of amorphous Tb(Fe0.55Co0.45)(1.5) films

Ngày tải lên : 16/12/2017, 09:42

... oxidation The fraction of the magnetostrictive alloy ͑18% of the total spectrum area͒ is small As already mentioned in the beginning of this subsection, this reflects that the thickness of the oxidation ... magnetization of M without any contribution to magnetostriction In the second step, the spins rotate in the direction of the applied magnetic field, leading to the change of both magnetization and magnetostriction ... to the strong local anisotropy of the R atoms and their random distribution of easy axes present in such sperimagnetic systems, the coercivity is strongly affected by internal stress, microstructure,...

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Tài liệu Báo cáo Y học: Molecular modeling of the dimeric structure of human lipoprotein lipase and functional studies of the carboxyl-terminal domain docx

Ngày tải lên : 21/02/2014, 15:20

... catalytic activity If the substrate recognition site and the catalytic site in the same polypeptide were responsible for catalyzing the lipid substrate, which is the expectation of the head-to-head ... domain of one subunit and the substrate recognition site in the C-terminal domain of the other face each other, thereby bringing together the substrate-binding and catalytic functions in proximity ... conﬁguration after cotransfection of inactive LPL mutants and recovery of catalytic activity (A) Lipase activity is not detected in COS7 cells transfected with only the S13 2T or the WWW mutant If the...

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Báo cáo Y học: Unfolding and refolding studies of frutalin, a tetrameric D-galactose binding lectin doc

Ngày tải lên : 17/03/2014, 23:20

... and T are the gas constant and the absolute temperature, respectively In order to estimate the conformational stability (DGH2 O ) U of frutalin, it was assumed that the linear dependence of the ... Although the transition curve of frutalin without this sugar ð2Þ The observed maximum ﬂuorescence emission of the protein at any concentration of the denaturant is given by the sum of the contributions ... ﬂuorescence intensity observed for Mfrutalin contrasted with that of Ufrutalin, possibly due to the fact that Trp is buried in the particular folding of the Mfrutalin structure, or is inserted into a...

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Báo cáo Y học: Engineering and mechanistic studies of the Arabidopsis FAE1 b-ketoacyl-CoA synthase, FAE1 KCS pot

Ngày tải lên : 24/03/2014, 03:21

... 5¢-ATTTCTGTATTCAAGCTGGAGGCAGAGCCGTG AT-3¢, antisense 5¢-CTGCCTCCAGCTTGAATACAG AAATG-3¢; N424D, sense 5¢-AGATTTGGGGATAC TTCATCTAGCTCAATTT-3¢, antisense 5¢-AGATGAAGT ATCCCCAAATCTATGTAACG-3¢; N424H, sense 5¢-AGATTTGGGCATACTTCATCTAGCTCA-3¢, ... decarboxylation activity and characterization of the mutants of the putative catalytic triad strongly support the hypothesis that the membrane-bound FAE1 KCS shares the same basic mechanism with the ... signiﬁcantly reduce the decarboxylation activity of the chalcone synthase, thus indicating that acylation of the active-site cysteine is not essential for decarboxylation of malonyl-CoA substrate Therefore,...

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Báo cáo y học: "Systematic review and meta-analysis of randomised trials and cohort studies of mycophenolate mofetil in lupus nephritis" pdf

Ngày tải lên : 09/08/2014, 08:23

... duration of therapy, information about patients studied and their diagnoses, study design, the number of patients with efficacy and/ or safety outcomes, and discontinuations, especially because of ... [18] transplants This provides additional reassurance of safety and tolerability of MMF, often at high doses (like the g daily in the heart transplant trial) and over a treatment duration of up to ... events by using as the denominator the total number of patients in studies mentioning the event For randomised trials in which MMF was compared with another treatment, relative benefit and relative...

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Báo cáo y học: "Influence of enrollment sequence effect on observed outcomes in the ADDRESS and PROWESS studies of drotrecogin alfa (activated) in patients with severe sepsis" pptx

Ngày tải lên : 13/08/2014, 11:22

... study, in the development and conduct of analyses, and in the clinical trials and data collection WLM, JJ, and DRN participated in the conception and design of the study, in the development and ... absolute reductions in mortality may not overcome the complications of therapy In ADDRESS, as in the PROWESS study, there was a statistically significant interaction between the observed treatment ... mortality rates between treated and placebo patients Results At the time of termination, 2,640 patients had been enrolled in the ADDRESS study at 516 centers in 34 countries Mortality data at...

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Báo cáo y học: "Figuring out what works: a need for more and better studies on the relationship between ICU organization and outcomes" potx

Ngày tải lên : 13/08/2014, 20:21

... both? The goal of asking these questions is not to exclude any sort of physician from the community of intensivists, but rather to work toward identifying the optimal way to train intensivists ... accepted that most of the opportunities to improve the performance of complex organizations derive from improving the structures and processes that they consist of Although this vital concept is often ... optimal duration of training? What is the optimum training curriculum? Are outcomes of certain types of patients better under the care of intensivists with a certain base specialty or ICU training...

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báo cáo hóa học:" The OnyCOE-t™ questionnaire: responsiveness and clinical meaningfulness of a patient-reported outcomes questionnaire for toenail onychomycosis" potx

Ngày tải lên : 20/06/2014, 15:20

... Guyatt's Statistic Overall Problem Mean Change Guyatt's Statistic Stigma Mean Change Guyatt's Statistic Treatment Satisfaction Mean Change Guyatt's Statistic COE -t questionnaire scales at adjacent ... for their help in the preparation of this manuscript The validation study design, analysis, interpretation of results, the writing of the manuscript represent the joint collaboration of all authors ... study, performed the statistical analysis, and drafted the manuscript SDM assisted in the design of the validation study, participated in the design of the statistical analysis, and helped to...

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Tài liệu Báo cáo khoa học: Structural and functional studies of the human phosphoribosyltransferase domain containing protein 1 docx

Ngày tải lên : 15/02/2014, 01:20

... Overall structure The structure of full-length human PRTFDC1 was ˚ determined at 1.7 A resolution with two subunits in the asymmetric unit Most of the polypeptide chains could be traced in the electron ... substrate and product Phosphoribosyltransferase activity was detected with hypoxanthine and guanine and there was no detectable activity with adenine Subsequently, the kinetic constants were determined ... amount of products was quantiﬁed directly, and therefore it is a more accurate and sensitive method compared to the spectrophotometric methods Because the enzymatic activity of PRTFDC1 towards hypoxanthine...

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Tài liệu Báo cáo khoa học: X-ray crystallographic and NMR studies of pantothenate synthetase provide insights into the mechanism of homotropic inhibition by pantoate docx

Ngày tải lên : 16/02/2014, 09:20

... synthesis of pantothenate from low amounts of pantoate [9] Here, we report the results of the structural studies of the pantoate-bound form of the N-terminal domain of E coli PS (nPS) The structure ... which the second molecule of pantoate binds to the pantoyl adenylate-bound form of the protein, at a site other than the active site, which then has a regulatory role in the kinetics of the reaction ... important to note that, at the level of sensitivity and resolution available for these studies, pantoate was not found to bind to any other site on the protein, leading us to conclude that there...

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Báo cáo khoa học: Human telomeric G-quadruplex: thermodynamic and kinetic studies of telomeric quadruplex stability potx

Ngày tải lên : 06/03/2014, 09:22

... experimental thermograms without ﬁtting to any particular model The thermogram yields the overall enthalpy directly as the integral of the thermogram: Z 1ị DH ẳ Cp dT The overall entropy may be calculated ... understand such allosteric effects, the energetics of the underlying conformational transitions in quadruplex structures must be determined The thermodynamics and kinetics of the transition of the ... rearrangements to generate the ﬁnal K+-bound product(s) CD studies showed that addition of the porphyrin TmPyP4 promoted conversion of the basket to the hybrid form The kinetics of the TmPyP4-induced...

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Báo cáo khoa học: Fluorescence quenching and kinetic studies of conformational changes induced by DNA and cAMP binding to cAMP receptor protein from Escherichia coli ppt

Ngày tải lên : 07/03/2014, 16:20

... time t, A and k are the amplitude and the observed rate constant, respectively, and F1 is the fluorescence at infinite time The validity of the fitting was evaluated by an inspection of residuals and ... (Poznan, Poland) The DNA sequences are as follows: 5¢-AAAAGTGTGACATGGAATAAATTAGT-3¢ for gal (26 bp), 5¢-ATTAATGTGAGTTAGCTCACTCATTA3¢ for lac (26 bp), and 5¢-AATTAATGTGACATATGTCA CATTAATT-3¢ for ... spectrum at 338 nm These two forms of the protein account for 55% and 45% of the total fluorescence emission, respectively In contrast to the Trp13 residue, the tryptophan located at position...

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Báo cáo khoa học: X-ray crystallography, CD and kinetic studies revealed the essence of the abnormal behaviors of the cytochrome b5 Phe35ﬁTyr mutant pdf

Ngày tải lên : 08/03/2014, 10:20

... However, the crystal structure of the Phe35fiTyr mutant shows that the ˚ hydroxyl oxygen atom of the side chain of Tyr35 is 3.21 A away from the atom CHB of the pyrrole group of the heme, making strong ... concentration constant increased sharply after the urea concentration exceeded M These results reflect the tightness of the heme attaching to the polypeptide of cyt b5 For the Phe35fiTyr mutant the ... Waals’ contacts with the heme Obviously, the introduction of hydroxyl group in the heme pocket strengthens the interactions between Tyr35 and the heme with the iron in the oxidative state The increased...

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Báo cáo khoa học: Comparative biochemical and functional studies of family I soluble inorganic pyrophosphatases from photosynthetic bacteria potx

Ngày tải lên : 16/03/2014, 11:20

... complementation studies demonstrate that photobacterial sPPases are functionally equivalent to that of the host organism, and that the promoters seem to be regulated by the same factors Analysis of the ... (Table 1) They display, however, greater heterogeneity in the molecular mass of the detected protein band, as is also the case for metal cation dependence, as the sPPase activity of many of these ... Pyrophosphatases from photosynthetic bacteria Results and Discussion Detection of sPPase activity in photosynthetic prokaryotes ) enzymatic features of isolated sPPases Family I is the most widespread and...

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Preparation and photoluminescence properties of amorphous silica nanowires

Ngày tải lên : 16/03/2014, 15:07

... surface of the pellets and the thermalcouple to become liquid-phase catalytic growth center The third step is that the vapor of silicon and silicon monoxide is transported to the catalytic center to ... stability is only relative Amoeba-shaped nanowires are attributed to monocentric nucleation and periodic unstable growth to exhibit a typical periodic instability of diameter The block dots of ... deposit on the surface of the trunks to become many new growth centers, namely, polycentre, resulting in the formation of branch-shaped nanowires The branch-shaped nanowires can grow stably, but the...

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Large scale synthesis, characterization and photoluminescence properties of amorphous silica nanowires by thermal evaporation of silicon monoxide

Ngày tải lên : 16/03/2014, 15:18

... 3(a)) and no metal particles are seen at either end of the wires The TEM investigations of the material further conﬁrm our view that growth of nanowires is essentially non-catalytic in the present ... present study are amorphous across the diameter instead of crystalline Si core and amorphous SiO2 outer shell structure as conﬁrmed by HRTEM image and SAED pattern On the other hand, the formation ... deposited on Ni-coated Si wafers The nanowires have diameter in the range 30–100 nm with center of the distribution at $50 nm The diameters remain nearly constant throughout the length of the nanowires...

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Photoluminescence and growth mechanism of amorphous silica nanowires by vapor phase transport

Ngày tải lên : 16/03/2014, 15:19

... shows the high-magniﬁcation TEM image of a catalyst tip, and Figs 2(c) and (d) are the corresponding SAED and high-resolution TEM image of the catalyst, respectively The catalyst is crystallized and ... speculate that the peak shifts for nanowires with different diameter are due to the fabrication temperature, at which these nanowires grow The temperature directly affects the chemical reactions ... diameter of 50 nm is too thick to show any distinct quantum effect on PL Thus the relatively small shift in emission peaks should not be directly related to size reduction There are several nanostructure...

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Báo cáo khoa học: Antimicrobial and conformational studies of the active and inactive analogues of the protegrin-1 peptide docx

Ngày tải lên : 22/03/2014, 21:20

... C-terminus), one at the N- and the other at the C-terminus; this is sufﬁcient to ensure the cationic nature of the peptide at its terminus The structure of BM-1 is very compact, like the PG-1 structure, ... differences between the structural families of these peptides applied mainly to the varied structures of the N- and C-termini All the features of the structures calculated for all three peptides were ... The distribution of hydrophobic and hydrophilic residues at the peptide surface is a structural feature required for the cytolytic activity of PG-1 Structure activity relationship studies of several...

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Báo cáo khoa học: Crystal structure determination and inhibition studies of a novel xylanase and a-amylase inhibitor protein (XAIP) from Scadoxus multiﬂorus pot

Ngày tải lên : 29/03/2014, 09:20

... formation of a loop that protrudes away from the protein surface into the solvent There is yet another interesting feature of the XAIP structure which is related to the conformation of loop b3–a3 This ... unlikely to change to accommodate the substrates This means that the size of the carbohydrate-binding channel is not only reduced in width, but is also terminated at the subsite just before the ... respectively XAIP characteristic loop The structural determination of XAIP revealed the presence of a novel loop that protrudes sharply away from the surface of the protein The longest helix a3 in the structure...

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