simon low temperature physicist
Báo cáo y học: "Low temperature tolerance of human embryonic stem cells"
... survived exposure to low temperature for extended durations Spontaneous differentiation of hESC after exposure to low temperature Following serial passage after exposure to low temperature, the proportion ... indistinguishable from non -temperature exposed hESC (data not shown) Chromosomal Analysis of hESC after exposure to low temperature Metaphase spreads of hESC following lowtemperature exposure were ... rate of hESC after exposure to low temperature (4oC and 25oC) for extended durations (24h and 48h) It was assumed that hESC not proliferate upon exposure to low temperature This assumption is...
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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
... thaliana The model was based on the following system of ordinary differential equations describing alterations in carbohydrate pools over time of exposure to low temperature (4 °C): d= ðSucÞ ¼ rCO ... acclimation of plants to freezing temperatures Plant Cell Environ 23, 893–902 Guy CL, Huber JLA & Huber SC (1992) Sucrose phosphate synthase and sucrose accumulation at low temperature Plant Physiol ... among Vitis genotypes grown under two temperature regimes Can J Plant Sci 89, 961–968 Strimbeck GR, Kjellsen TD, Schaberg PG & Murakami PF (2008) Dynamics of low- temperature acclimation in FEBS Journal...
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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
... environmental temperature both in vitro and in vivo [16,17] The ab-tubulin dimers of mammals, for example, form microtubules in vitro at temperatures near 37 °C, and these polymers dissociate at low temperature ... polymerase followed by 45 cycles 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 temperatures ... strongly that E focardii has evolved c-tubulins that are able to nucleate microtubule structures at low temperature while individually performing specialized subfunctions The E focardii c-tubulin gene...
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hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
... the responsiveness of pure WO3 sensors operated at room temperature These sensors were found to be insensitive to NO2 , CO and NH3 at low temperatures of operation Additionally, Sberveglieri and ... irresponsive to gases when operated at temperatures below 350 ◦ C Finally, it is well known that pure SnO2 -based sensors are almost insensitive to gases when operated at room temperature [10,18] On the ... capability of metal oxidebased sensors at low operating temperatures In particular, micro-sensors based on SnO2 /MWCNTs hybrid films operated at room temperature showed the higher sensitivity...
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low temperature hydrothermal synthesis of monodispersed flower - like titanate nanosheets
... ethanol was mixed with 0.4 mL of 0.1 M aqueous potassium chloride, followed by the addition of 2.2 mL of TTIP at ambient temperature under stirring condition The solution was mixed until a white ... could be observed for all samples prepared at temperature P80 °C (Fig 3c–h) Our results showed that, for this preparation method, the hydrothermal temperature was a critical factor As seen in ... and (b) followed by calcination at 500 °C for h 382 J Jitputti et al / Catalysis Communications 10 (2009) 378–382 amount of H2 evolved was estimated to be 72 lmol gÀ1, which was lower than that...
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low-temperature h2s sensors based on ag-doped fe2o3 nanoparticles
... about 160 ◦ C The operating temperature of all the Ag-doped sensors is lower than that of the reported H2 S sensors [27–30] The lower operating temperature could lead to lower energy consumption, ... content to 100 ppm H2 S (5) For the Ag/␣-Fe2 O3 sensors, the low response at low operating temperature can be attributed to the low thermal energy of the gas molecules, which is not enough to react ... essentially low [31,32] and low response is observed Y Wang et al / Sensors and Actuators B 131 (2008) 183–189 On the other hand, the reduction in response after the optimum operating temperature...
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wo3 thin film sensor prepared by sol–gel technique and its low-temperature sensing properties to trimethylamine
... and annealed at different temperatures for 10 h The XRD pattern of the thin film annealed at 150◦ C does not show any definite structure So the sample annealed at this temperature was in the amorphous ... sensitivity of the sensor is affected by the operating temperature Fig shows the relationship between the gas sensitivity and the operating temperature of WO3 thin film sensor to TMA gas with various ... TMA, the optimum of the operating temperature is 70◦ C To 700 and 1000 ppm TMA, the gas sensitivity reaches almost the highest value at 70◦ C When the operating temperature is in the range of 70–85◦...
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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
... adaptive features that allow them to survive and grow at a very low temperature [10–14] A molecular understanding of these features would be important to our knowledge regarding low- temperature- adapted ... syringae at low temperature (4 °C) The very low (but non-zero) ATPase activity of RecD (approximately 8–10% of the wild-type) is able to perform the RecBCD-dependent function at low temperature ... growth at low temperature While it is impossible to directly assess these enzymatic activities of RecD in vivo, the relative in vitro activities of the two enzyme reactions at low temperature...
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Carbon supports for low temperature fuel cell catalysts
... cobalt and nickel at temperatures ranging from 550 to 1000 8C [143] Much lower growth temperatures can be reached when PECVD is used [147], opening the possibility to use temperature sensitive ... support on the Pt particle growth during thermal treatment at high temperatures The activation energy of particle growth is lower at lower pH It is known that the stability of the metal particles ... prepared hollow carbon spheres by pyrolysis of hollow carbonaceous composites at 900 8C under nitrogen flow Pt nanoparticles were uniformly anchored on the outer and the inner surface of HCSs Hollow carbon...
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morphology control of zno bilayer structure by low-temperature
... nanorods layers structure were obtained by controlling growth concentration and position via low- temperature hydrothermal process The shape evolution of nanodendrite–nanorod structure was discussed ... the seed layer (Fig 2A, B) at 90 1C through the reactions of Zn2+ cations with OH− anions as foolows: NH3 ⋅H2 O⇔NHþ þOH− ð1Þ Zn2þ þOH− -½ZnðOHÞ4 2− -ZnO þ H2 O þ OH− ð2Þ Zn2þ þ NH3 ⋅H2 O-½ZnðNH3 ... -½ZnðOHÞ4 2− ð4Þ In the reaction system, NH3 Á H2O is partly combined with Zn2+ and releases OH− slowly, resulting in a relatively stable environment for crystal growth Due to the sufficient Zn2+...
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Bactericidal effects of low temperature oxygen plasma on bacillus stearothermophilus and staphylococcus aureus
... BACTERICIDAL EFFECTS OF LOW- TEMPERATURE OXYGEN PLASMA ON INTRODUCTION A novel sterilization method capable of more rapidly killing microorganisms and less damaging material is low- temperature plasma ... experimental conditions Certainly, more tests and in-depth study of low- temperature sterilization are needed to elucidate the mechanism of low- temperature plasma sterilization (CHOI et al., 2006) There ... substrate and air dried in a laminar-flow hood Bacteria on carriers were then either exposed to low- temperature oxygen plasma, or vacuum-treated, or hightemperature dry heated or remained un-treated...
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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
... that temperature [15] In fact, the real temperature of the tumor tissue between the two adjacent electrodes is lower than the target temperature because of the “heat sink” effect of blood flow ... control group (12.63 ± 1.87 cm ) It seemed that the lower the temperature of RFA was, the larger the tumor volume was (Fig 3) Effects of low temperature of RFA at the target sites on lung metastasis ... survive high temperature from 5055°C However, cells can seldom survive temperatures above 55°C [9] Therefore, it seems that most residual tumor and rapid progression should occur when the temperature...
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Báo cáo toán học: " Synthesis of highly transparent ultrananocrystalline diamond films from a lowpressure, low-temperature focused microwave plasma jet" ppt
... crucial to realize a low- temperature synthesis Therefore, argon-rich (hydrogenpoor) microwave plasma is popularly adopted for lowtemperature preparation of UNCD films due to the much lower thermal conductivity ... plasma jet [13,14], enabling it to achieve high-efficiency and high-quality deposition at low- pressure /low- temperature [LPLT] conditions (without substrate heating) The MPJCVD-enhanced growth [MEG] ... and coating on lowmelting point materials with low cost The synthesis and characteristics of UNCD films produced by the MEG technique at various growth pressures (5 to 100 Torr) and temperatures...
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Báo cáo hóa học: " Comparison of nickel silicide and aluminium ohmic contact metallizations for low-temperature quantum transport measurements" docx
... from base temperature to 800 mK The inset illustrates the exponential increase in the magnitude of the resistance peak, suggesting thermal activation over the BCS energy gap Figure Low- temperature ... experimental results have indicated ambiguity in the magnetic properties of NiSi for fields below 200 mT at low temperatures [31] It is therefore important to determine whether the nickel silicide contacts ... anomalous resistance peak, we have performed temperature dependence measurements as shown in Figure The magnitude of the peak is seen to rapidly increase as the temperature is reduced Whilst the BCS...
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Báo cáo hóa học: " Catalytic ozone oxidation of benzene at low temperature over MnOx/Al-SBA-16 catalyst" pdf
... Mn2O3 particles, resulting in low activity Moreover, Al-SBA-16MN15% contained MnO and Mn nitrate with low activity, which is supposed to be another reason for the low activity of Al-SBA-16-MN15% ... fixed-bed flow reactor Ozone was produced from O Page of using a silent-discharge ozone generator Before each experiment, the sample was heated at 450°C in a Pyrex glass reactor under an O2 flow The ... magnetic stirrer at the same temperature The molar composition of the mixture was F127:TEOS:HCl:H2O = 0.0040:1.0:4.0:130 This mixture was put in an oven for 24 h at the same temperature The mixture...
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Báo cáo hóa học: " Low-temperature synthesis of CuO-interlaced nanodiscs for lithium ion battery electrodes" potx
... nanodisc structures, temperature- and time-dependent experiments were carried out Figure shows the series of typical FESEM images of samples taken after reaching a preset temperature and time ... to a tendency to form a 1-D structure [10,14,15,18] With the increase in the reaction temperature from room temperature to 50°C, each nanowire was shortened and thickened laterally due to the oriented ... electrochemical performance of these CuO nanostructures Conclusion In summary, the successful low- temperature synthesis of phase-pure 2-D CuO-interlaced nanodiscs was demonstrated using simple...
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Báo cáo hóa học: " Low-temperature fabrication of layered selforganized Ge clusters by RF-sputtering" potx
... growth of NCs, we have shown the possibility to grow the self-assembled nanoclusters at low temperature (250°C) Low- cost process will be explored further to obtain well-separated crystalline NCs Conclusions ... the low amount of Si used during the growth and/or a loss of Si Figure Raman spectra of as-deposited and annealed multilayers (a) Raman spectra of the as-deposited and annealed multilayers at temperatures ... annealing temperature, the compositional changes due to the out-diffusion of Ge from the crystallized nanoparticles and the associated reduction of the scattering volume cause the NCs to fall below...
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Báo cáo hóa học: " Effects of low-temperature capping on the optical properties of GaAs/AlGaAs quantum wells" doc
... of GaAs/AlGaAs QWs (a) Lowtemperature PL spectra of 4-nm GaAs/AlGaAs QWs capped at different temperatures (b) Integrated PL intensity plotted as a function of the capping temperature Jo et al ... http://www.nanoscalereslett.com/content/6/1/76 Page of capping layer during the low- temperature growth It is well known that GaAs grown at temperatures below 300°C becomes nonstoichiometric with an excess of arsenic ... molecular-beam epitaxy at low temperatures J Vac Sci Technol B 1989, 7:710 Look DC: On compensation and conductivity models for molecularbeam-epitaxial GaAs grown at low temperature J Appl Phys...
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