real gases behave ideally at low temperature
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 ... 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 ... a preventative process for dealing with the issue in the field.Dramatic Attenuation in Fiber Access Terminals at Low Temperatures...
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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
... initial denaturation at 95 °C for 2 min to activate the polymerase followed by 45cycles of denaturation at 95 °C for 30 s and annealing andextension at 60 °C for 15 s each. Following amplification,melting ... 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, ... template at cold temperatures [12,35]and that the residue substitutions and conformationalchanges at the plus-end facilitate longitudinal inter-action with the a-tubulin subunit located at theminus-end...
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Báo cáo y học: "Low temperature tolerance of human embryonic stem cells"
... results demonstrated that the majority of hESC survived exposure to low temperature for extended durations. Spontaneous differentiation of hESC after exposure to low temperature Following serial ... undifferentiated state of hESC is affected by exposure to low temperature. The degree of spontaneous differentiation of low temperature- exposed hESC colonies was assessed by morphological observations ... indistinguishable from non -temperature exposed hESC (data not shown). Chromosomal Analysis of hESC after exposure to low temperature Metaphase spreads of hESC following low- temperature exposure were...
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Tài liệu CUSTOMER THINK GUIDE TO REAL CRM PUTTING CUSTOMERS AT THE HEART OF YOUR BUSINESS PROFITABLY. ppt
... The creation of value for the customer must lie at the heart of any customer relationship strategy. Yet, I encounter companies that talk about creating customer value, but what they are really ... cements a solid relationship association to the corporate entity. WORKFLOW AUTOMATION AND INTERACTION MANAGEMENT Workflow is the linkage both within each set of organizational functions ... Using workflow allows business rules to be encapsulated into a centralized repository, rather than distributing it out to the individual organizations. Properly implemented, workflow can allow organizational...
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Tài liệu Báo cáo khoa học: A systems biology approach for the analysis of carbohydrate dynamics during acclimation to low temperature in Arabidopsis thaliana doc
... limitedcapacities to cope with low temperature, plants fromtemperate climates, such as Arabidopsis thaliana, grow at low temperature and can increase their freezing tol-erance when exposed to low but nonfreezing ... the rate of assimilate export tosink organs. A comprehensive overview of interconversion rates is pre-sented, from which accession-specific regulation strategies during exposureto low temperature ... process of cold acclimation.We conclude that acclimation to low temperature rep-resents a dynamic process, the investigation of whichtherefore requires approaches that take into accountmetabolic...
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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
... right 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. ... the difference between bkcatand kcat at high pH is large relative to the difference at low pH, andthe difference between bkcat at high pH and bkcat at low pHis relatively large (Fig. 5). ... zero at low pH. For atitration that ends at zero activity for the fully protonatedhistidine, theory predicts that at 1 pH unit below thepKa, only 10% of the histidine is unprotonated and thattherefore...
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Báo cáo khoa học: Unusual stability of human neuroglobin at low pH – molecular mechanisms and biological significance docx
... that is thought to realistically mimicthe interior of the protein matrix.Urea-mediated denaturationThe urea-mediated denaturation of Ngb and Mb was fol-lowed by monitoring the ellipticity at ... K, Nakatani K,Minamiyama Y, Seki S & Yoshizato K (2001) Charac-terization of a stellate cell activation-associated protein(STAP) with peroxidase activity found in rat hepaticstellate cells. ... conducted on the isolated 32–151 fragmentindicated that it is still folded and highly helical even at pH 2.0 (not shown). Therefore, the proteolyticprobe indicates that, at low pH, apoNgb retains...
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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 ... actual data. We generated 1000 “realizations” of the 20 populations, randomlygenerating new log~αvalues and then simulating recruitment in each case.© 1999 NRC Canada2418 Can. J. Fish. Aquat. ... pop-ulation numbers and fishing mortality were usually esti-mated using sequential population analysis (SPA) ofcommercial and (or) recreational catch at age data for mostmarine populations....
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a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature
... atom. The other is that there isa lone electron pair in NH3. What is more important is that low- temperature ammonia oxidation was observed over iron oxide[26,27]. That is, the addition of ... Intermediates deter-mined by in situ IR-spectroscopy in low- temperature oxidation of ammo-nia on Fe2O3, Kinet. Catal. 40 (1999) 526–531.[27] O.N. Sil’chenkova, V.N. Korchak, V.A. Matyshak, ... Matyshak, The 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...
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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 ... 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 ... 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,...
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low temperature hydrothermal synthesis of monodispersed flower - like titanate nanosheets
... investigate the effect of treatment temperature. Upon thermal treatment at 500 °C for 1 h, the titanate nano-sheets were converted into anatase TiO2(Fig. 1f), with slightlydeformation of their structures ... Jitputti et al. /Catalysis Communications 10 (2009) 378–382 Low temperature hydrothermal synthesis of monodispersed flower-like titanatenanosheetsJaturong Jitputtia, Thitima Rattanavoravipaa, ... closed container at room temperature (25 °C). The powder (denoted as AS) suspended in the vessel wascollected by filtration and dried at 60 °C in air.2.2. Preparation of titanate nanosheetsMonodispersed...
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low-temperature h2s sensors based on ag-doped fe2o3 nanoparticles
... gasresponse at about 160◦C. The operating temperature of all theAg-doped sensors is lower than that of the reported H2S sen-sors [27–30]. The lower operating temperature could lead tolower energy ... and ratherloweroptimum operating temperature to H2S. Especially, the opti-mum performance was obtained at an operating temperature of160◦C for the 2 wt% Ag/␣-Fe2O3sensor calcined at ... optimumoperating temperature may be due to the difficulty in exother-mic gas adsorption at higher temperature [33]. Therefore, themaximum response can just be observed at the right operating temperature. The...
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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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wo3 thin film sensor prepared by sol–gel technique and its low-temperature sensing properties to trimethylamine
... thin films annealed at differenttemperatures.pattern and the result indicates that the sample was amor-phous or in a weak polycrystalline state (see Fig. 1(b)). Thediffraction pattern recorded ... affected by theoperating temperature. Fig. 3 shows the relationship betweenthe gas sensitivity and the operating temperature of WO3thin film sensor to TMA gas with various concentrations. Asshown ... indicate the crystallization of tungsten oxide occurs at temperatures higher than 500◦C. The sensing characteristics of the thin film sensor to trimethylamine were measured. A low- temperature, high...
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