real gas molecules behave most ideally at low temperature and high pressure
Báo cáo khoa học: Different roles of two c-tubulin isotypes in the cytoskeleton of the Antarctic ciliate Euplotes focardii Remodelling of interaction surfaces may enhance microtubule nucleation at low temperature doc
... includingcell-fate specification, regulation of differentiation, and control of cell proliferation and movement [45].Recently, we have shown that activation of the heat-shock response in the ciliate T. ... hypothesis that c-T1 and c-T2 have evolved sequence-based structural alterations that facilitate template nucleation of microtu-bules by the c-tubulin ring complex at cold temperatures.AbbreviationsqPCR, ... 45cycles of denaturation at 95 °C for 30 s and annealing and extension at 60 °C for 15 s each. Following amplification,melting curve analysis of the DNA was performed at tem-peratures in the...
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Báo cáo khoa học: ATPase activity of RecD is essential for growth of the Antarctic Pseudomonas syringae Lz4W at low temperature potx
... reaction) and Km(DNA)(DNA concentration at the half-maximal rate of ATP hydrolysis) for the reactions werecalculated. Km(ATP)was determined at a saturating concen-tration (1 lm) of ssDNA, and ... [9].Psychrophilic and psychrotrophic bacteria fromAntarctica have evolved various novel adaptive featuresthat allow them to survive and grow at a very low temperature [10–14]. A molecular understanding ... proteins at various temperatures, it appears that,by and large, the in vitro assay temperatures (4 and 25 °C) do not affect the binding (Fig. 5C). Table 2summarizes the key biochemical and biological...
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Tài liệu Dramatic Attenuation in Fiber Access Terminals at Low Temperatures doc
... excessiveattenuation loss at low temperatures (0˚C to -40˚C). Subsequent research also reveals that theissue becomes more severe for cables exposed to initially high temperatures (greater than ... ADC's own data, engineers set out to pinpoint and formulate a preventative process for dealing with the issue in the field.Dramatic Attenuation in Fiber Access Terminals at Low Temperatures ... paper that outlined similar problems withcertain fibers in varying temperature environments. The paper, entitled "Time- and Temperature- Dependent Material Behavior and Its Impact on Low- Temperature...
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Tài liệu Báo cáo khoa học: High activity of human butyrylcholinesterase at low pH in the presence of excess butyrylthiocholine pptx
... the difference between bkcat and kcat at high pH is large relative to the difference at low pH, and the difference between bkcat at high pH and bkcat at low pHis relatively large (Fig. 5). ... panel). At low pH, bkcatis larger thankcat, but at high pH bkcatis smaller than kcat.Thatistosay,A328W goes from substrate activation, at low pH, tosubstrate inhibition, at high pH. ... bkcat at high pH becomes closer to its value at low pH as the size of the residue at position 328 gets larger(Fig. 2). For example, the difference between bkcat at high pH and bkcat at low...
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Báo cáo khoa học: Unusual stability of human neuroglobin at low pH – molecular mechanisms and biological significance docx
... spectroscopic and pro-teolysis data, which indicate that apoMb at pH 2.0 ismostly in a random coil conformation, lacks specifictertiary interactions, and displays an extended confor-mation with ... metabolism and pH during globalcerebral ischemia and reperfusion in rats: correlation of1H and 31P NMR spectroscopy with fatty acid and excitatory amino acid levels. J Cereb Blood Flow Metab12, ... path-lengthcuvette (2 mL) was used for CD measurements. The proteinsamples were incubated at the desired denaturant concen-tration for 5 h at 25 °C in order to attain equilibrium.Denaturation...
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Maximum reproductive rate of fish at low population sizes potx
... obser-vations are not included in this analysis. The SPRF=0wascalculated using estimates of natural mortality, weight at age, and maturity at age. Maturity and weight at age wereusually estimated ... pop-ulation numbers and fishing mortality were usually esti-mated using sequential population analysis (SPA) ofcommercial and (or) recreational catch at age data for most marine populations. ... and related methodsthat reconstruct population size from catch at age data (seeHilborn and Walters (1992, chaps. 10 and 11) for a descrip-tion of the methods used to reconstruct the population...
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a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature
... fact that the elec-tron donating ability of NH3is higher than those of ethanol and methanol. One is due to the higher electronegativity of the oxy-gen atom than that of the nitrogen atom. ... ppm NH3forthree times at room temperature. It is clear that the response and recovery characteristics are almost reproducible and ratherquick when exposed to NH3 and also when exposed again ... mechanism of low- temperature ammonia oxidation on metal oxides according to thedata of spectrokinetic measurements, Kinet. Catal. 43 (2002) 363–371.[28] J. Watson, The tin oxide gas sensor and its...
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hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
... sen-sors at temperatures low enough so that appreciable structuralvariation never occurs, provided that gas reactions occur at areasonable rate.Additionally, the development of sensors that work at ... operated at room temperature. These sensorswere found to be insensitive to NO2, CO and NH3 at low temper-atures of operation. Additionally, Sberveglieri and co-workers[17] reported that, ... paper)were irresponsive to gases when operated at temperatures below350◦C. Finally, it is well known that pure SnO2-based sensorsare almost insensitive to gases when operated at room tempera-ture...
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TiO2nanotubes and CNT–TiO2hybrid materials for the photocatalytic oxidation ofpropene at low concentration
... by a heat treatment in air at 520 8C. Sample TiO2-NT3 was prepared by heat treatment in Ar at 700 8C followed by a heat treatment in air at 520 8C.XRD analysis showed that the heat treatment ... of the photocatalysts for propene oxidation at low concentrationThe photocatalytic performance of these new materials wasinvestigated for the oxidation of propene at low concentration,100 ppmv, ... argon at higher temperatures, theanatase was transformed into rutile either partially (at 550 8C) orcompletely (at 700 8C). Sample TiO2-NT2 was prepared by heattreatment in Ar at 550 8C followed...
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Báo cáo Y học: Characterization of a partially folded intermediate of stem bromelain at low pH ppt
... gainst denaturant c oncentration.Fig. 5. Far UV-CD spectra of stem bromelain. Native protein at pH 7.0 (ÐÁÐ), acid-induced state at pH 2.0 (Ð) and 6MGdnHCldenatured state (± ±).50 S. Khatun Haq ... conformational state that isdifferent from the native state at pH 7.0 as well ascompletely unfolded state in the presence of 6MGdnHCl.Figure 3 shows the near UV CD spectra of the nativestate ... lessconstant, indicative of the presence of a non-native stableintermediate at low pH.The emission spectrum of stem bromelain at pH 7.0(Fig. 2) shows a maximum at 347 nm that suggests thatsome of...
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Báo cáo khoa học: The histidine-phosphocarrier protein of Streptomyces coelicolor folds by a partially folded species at low pH ppt
... adequately described as a two-state processwithout the accumulation of intermediates at neutral and moderately basic conditions (pH 7–9) at 25 °C. The stabilityof the protein, at pH 7.5 and ... suggesting that proteinstability was similar in that pH range.It is interesting to note here that the transition at pH 3.5(Fig. 5A) showed a low degree of cooperativity at low temperatures, although ... thermal denatur-ation experiments, we decided to follow the chemicaldenaturation at pH 7.5 to compare with the stabilityFig. 5. Thermal denaturation profiles of HPr followed by far-UV CD at 222...
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Báo cáo hóa học: " Low temperature of radiofrequency ablation at the target sites can facilitate rapid progression of residual hepatic VX2 carcinoma" pdf
... of low temperature of RFA at the target sites onlung metastasis of hepatic VX2 carcinomaWe examined by gross observation lung metastasis ofhepatic VX2 carcinoma after RFA at low temperature. Quantifiable ... HCC. The real ablative temperature ofthe tumor might be nearer to the target temperature, compared with the clinical situation. This was why wechose 85°C as the highest RFA temperature. At present, ... invasion and metastasis when the local ablative temperature wasnot sufficiently h igh. Besides, it seemed that the lowerthe target temperature was, the more significant werethe local proliferation...
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Tìm thêm: xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct mở máy động cơ rôto dây quấn hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008