đề thi thử tin học

... Kyle WE, Harris BJ, Martin JJ: Methionine metabolism in mammals: Concentration of metabolites in rat tissues J Nutr 1982, 112((1011-1018)) 36 Finkelstein JD, Martin JJ: Methionine metabolism in ... 5methyltetrahydrofolate is a substrate for the methionine synthase reaction through which homocysteine is remethylated to methionine that is then converted to S-adenosylmethionine (SAM) Thus one would expect ... strategies This will likely require more human genetic studies, more population-based studies relating nutritional status to methylation capacity, and more modeling studies to assist in generating...

Ngày tải lên: 13/08/2014, 16:20

... increases in the stress magnitudes, and this leads to mechanical damage, which can appear as through-the-thickness flaws or pinholes in the membrane, or delaminating between the polymer membrane and ... 1e-3 1e-3 m m m m Gas diffusion layer thickness δ GDL δ mem δ CL 0.26e-3 m 0.23e-3 m 0.0287e-3 m Wland Wet membrane thickness (Nafion® 117) Catalyst layer thickness Hydrogen reference mole fraction ... Under certain ambient and operating conditions, such as low humidity, high temperatures, and low current densities, dehumidification of the membrane may occur, resulting in deterioration of protonic...

Ngày tải lên: 05/09/2013, 14:58

... Each heater is manufactured by twisting a wire with resistance of 2.5 (Ω /m) on a piece of mica with thickness 0.4 mm The mica has a property of heat conducting and electric insulation Another ... manufactured from galvanized iron sheets, 0.8 mm thick with 0.7×0.7 m² base area and 0.555 m height The condensing surface used is a glass sheet of mm thickness Silicon rubber sealant is used to insure ... brine) and design parameters (such as cover materials, thickness and its inclination, thermal insulation and brine depth) The objective of this work is to investigate the effect of brine depth...

Ngày tải lên: 05/09/2013, 16:10

... JBD maintains its liquid phase for an increased duration, facilitating more droplet penetration into the combustion chamber This feature can lead to increase the fuel consumption, peak temperature ... EGR rates This is expected due to the extra oxygen amount of biodiesel approximately 10-12% by weight, in accordance to previous findings of other researches in biodiesel fuel [9-12] This oxygen ... This is due to the higher calorific values and densities of JBD blends, compared to DF (as shown in Table 1) At 5% EGR, the BSFC of all test fuels was lower than that of in case without EGR This...

Ngày tải lên: 05/09/2013, 16:11

Ngày tải lên: 18/01/2014, 07:20

... with propensity scores falling within a specific range) is as if the selection into treatment is random within each cell and the probability of participation within this cell equals the propensity ... onset Parents in visiting relationships at the time of childbirth are more likely than cohabiting parents to separate within three years after a premarital birth: 26% of cohabiting parents as opposed ... 31–60 Goldstein, J.R., and K Harknett “Parenting Across Racial and Class Lines: Assortative Mating Patterns of New Parents Who Are Married, Cohabiting, Dating or No Longer Romantically Involved.”...

Ngày tải lên: 12/02/2014, 11:20

... vibrating sample magnetometer (VSM) Results and discussion 3.1 X-ray diffraction X-ray powder diffraction (XRD) patterns of Ni1-XCoX Fe2O4 (with x = 0, 0.2, 0.4, 0.6, 0.8) are shown in Fig From this ... crystalline particles (domains) and the third one is orginated from the action of elastic mechanical deformation In fact, the first term plays a decided role for creating high coercivity of materials, ... moment of a ion Co2+ is equal to 3μB, during it is μB for a ion Ni2+ and μB for Fe When x increased this leads to the compensation of ion Fe3+ in the tetrahedral and octahedral location That led to...

Ngày tải lên: 13/02/2014, 04:20

... the hearer is hasty, she might select B i l l as the new Cb However, this is not borne out by the unaccented him, which continues to cospecify with B i l l Since he and him cannot select the ... Reader in Philosophy, Linguistics and Psychology, Cambridge University Press, 1971 Christine Nakatani Accenting on Pronouns and Proper Names in Spontaneous Narrative Proceedings of the European ... assumptions: (1) To analyze the effects of pitch accents on pronominals, it is necessary to distinguish between attentional and propositional salience Attentional salience measures the degree...

Ngày tải lên: 20/02/2014, 22:20

... tertiary structure of RNase A (Figs 2–4) Interestingly, the preservation of the tertiary structure coincides with the activity profile of RNase A (Fig 4) This behaviour differs from that reported for ... cleaving the Ala20-Ser21 peptide bond (Figs 5B and [21,22]) This cleavage is possibly due to the high flexibility of the loop region around this peptide bond [33], whereas the rest of the RNase A ... aggregation of the protein, as reported for creatine kinase [38], and activity changes of the protease, could be ruled out It is noteworthy that in this range of trifluoroethanol concentration, no...

Ngày tải lên: 22/02/2014, 07:20

... Generally Accepted Accounting Principles IAS International Accounting Standard NPV Net present value PAT Positive Accounting Theory R&D Research and development VAS Vietnamese Accounting Standard INTRODUCTION ... manipulating accounting information Therefore, Nortel had not used monetary instruments effectively in encouraging managers to product the true and fair accounting information 1.2 Scope of research This ... resource management, motivating employees to work on high effort is one of the most important issues In the accounting field, motivating managers and accountants in choosing accounting policies that...

Ngày tải lên: 13/03/2014, 14:20

... the  reminder  of  this  tradition. Low land areas cultivating wet rice  (such  as  in  District  2)  naturally  were  places  for  balance  of  the  drainage,  but  constructing  and  concretization  ... and  sustainable  way,  protecting  fertile  agricultural  land  and  ecological  areas,  creating green belt for the city.   Acknowledgements  5. Conclusions  In  this  study,  remote  sensing  ... Study area    Fig. 1. The study area.  3. Methodology  This study was based on remotely sensed  data (satellite images), along with fields check  and  existing  maps.  Land  cover  patterns  for  1989 ...

Ngày tải lên: 14/03/2014, 15:20

... accruals are accounting adjustments to the firm's cash flows mandated by accounting standard-setting bodies (e.g., the Securities Exchange Commission and the Financial Accounting Standards Board) ... non-discretionary accruals and accounting procedures Voluntary changes in accounting procedures reflect purely discretionary accounting procedure decisions Reported changes in accounting procedures are available ... negative 7.1 Contingency tests The contingency tests are replicated using the effect of changes in accounting procedures on earnings available for bonuses as a proxy for discretionary accounting decisions...

Ngày tải lên: 15/03/2014, 16:20

... oxygen thermal donors (TDs)related defect states, indicating that this kind of oxygenrelated defect was responsible for the observed red PL in this system w23x In the present study, we further extend ... PL intensity change, with the intensity normalized to that of the starting position For each temperature curve, this starting point was obtained by annealing the film at 700 8C for several minutes ... they favor oxygen TDs-like defect states as PL centers Furthermore, two PL centers in this red PL were distinguished according to their variance in annealing temperatureand time-dependence The...

Ngày tải lên: 16/03/2014, 15:31

... 20) Ferritin was estimated by an ELISA two-step sandwich assay using Boehringer Mannheim test kits (Boehringer Mannheim, Mannheim, Germany) The CV for ferritin were 4·8 and 4·3 % at ferritin concentration ... of Fe, TIBC and ferritin, serum was stored at 48C and analysed within d of collection All patients in the study group were commenced on a short course of chemotherapy consisting of four drugs per ... further five in the Fe þ other haematinics-supplemented group The gastrointestinal upsets 544 U Devi et al were very mild and did not warrant any intervention or discontinuation of therapy Moreover,...

Ngày tải lên: 22/03/2014, 18:20

... demonstrating the ability of the HAMP domain region to regulate AC activity The effect of the HAMP domain on the CHD of Rv1319c was much less pronounced, supporting the earlier notion of a distinct ... the presence of mM Mn2+ as a cofactor, demonstrating that the four genes code for functional ACs All enzymes were specific for ATP as a substrate Tiny guanylyl cyclase side-activities were detectable ... HAMP-domain which is part of the region connecting the membrane anchor to the catalytic domain (CHD) Secondary structure prediction suggested that the second amphipathic helix of the HAMP domain is C-terminally...

Ngày tải lên: 23/03/2014, 12:20

... relevant strings in this summary, but found them in other summaries; or (2) the strings selected as relevant elsewhere in the topic were accidental, and as such not repeated in this summary Either ... of the most consistent in assigning Readability scores, but is not very good at selecting SCUs consistently This can be explained by the fact that the Pyramid evaluation and assigning Readability ... than good, suggesting that the signal-to-noise ratio is still tipped in favor of signal The only exception is Readability, where ROUGE records a slight increase in correlation; this is unsurprising,...

Ngày tải lên: 30/03/2014, 17:20

... 700 300 500 800 Hardness, BHN b, 2Ntr' and k with Brinnel Hardness (BHN) Substituting this into Eq and differentiating with respect to (r) to obtain the maximum value of Kf, Kfmax= Kfmax = + (a/2}(t/a) ... (Fig 3); most fatigue cracks initiating at internal defects so in tempered weld metal; toe cracks will initiate in the grain-coarsened heat affected-zone (high wetting angles) or in untempered, highly ... is determining the appropriate value of Kf for the weld toe This difficulty arises from the fact that the notch-root radius of a discontinuity such as the weld toe is unknown and variable Microscopic...

Ngày tải lên: 24/05/2014, 20:36

... of Big-audit firms This test helps in detecting the backdating of ESOs If executives are backdating options, a longer reporting lag implies that, on average, they were backdating aggressively, ... requirements 2.6 Summary This chapter provides an overview of the pertinent literature relating to this research study In particular, it reviews agency theory and the role of auditing as the primary ... backdating, but have not eliminated it This study extends this new area of research by investigating the role of the audit firm in mitigating the backdating phenomenon Since Big-audit firms are...

Ngày tải lên: 03/06/2014, 02:15

... agents at the discretion of the treating physician based on the patient's medical history and participating medication formulary Therefore, the drug assignment within the study was not random and ... a similar manner as the PAD patients and were excluded for the same ambulation limiting problems All participating patients gave informed consent in the presence of one of the vascular surgeons ... over the straight leg during single support Though this value was unchanged statistically, PAD patients may exhibit a decreased ability to generate this moment as indicated by the decreased knee...

Ngày tải lên: 19/06/2014, 08:20