high temperature hot water
Báo cáo khoa học: Hyperthermophilic enzymes ) stability, activity and implementation strategies for high temperature applications pot
Ngày tải lên :
07/03/2014, 05:20
... yields when the reaction is per-
formed at high temperatures; (e) the reactions kinetics
are faster at high temperatures; (f) enzymatic process-
ing at temperatures near or above 100 °C minimizes
the ... and stable at
high temperatures, and adapted to low temperature
environments. However, another theory suggests that
hyperthermophiles arose from mesophiles via adapta-
tion to high temperature ... mesophilic proteins at room temperature and
increases with temperature, so as to allow for enzy-
matic activity near 100 °C. It is only upon achieving
these high temperatures that sufficient molecular...
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- 1
singhal, s. c. (2002). high temperature solid oxide fuel cells - funda
Ngày tải lên :
18/04/2014, 12:25
... existing electrical system: and
20
High
Temperature Solid Oxide
Fuel
Cells:
Fundamentals,
Design
and Applications
U.
B,
Pal and
S.
C.
Singhal,
High Temperature Science,
27
(1990) ... conductivity of pure water and pure common
salt is low but that
of
an aqueous salt solution is high. In a short time many
of
the mixed oxides which exhibit high conductivity at elevated temperatures, ... the complex materials and the high expansion coefficient.
Of
course the
difficulties are greater because
of
the temperature
of
operation. Additional
22
High Temperature Solid Oxide Fuel...
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- 0
introduction to high-temperature superconductivity selected topics
Ngày tải lên :
24/04/2014, 17:13
... operating temperature exceeds a
certain value. This temperature may be as low as 30 K for some materials and as high as 90
K for others.
8
It is known from development of LTSC wires that high transport ... or
intermediate (20–30 K) temperatures is worth considering. Conventional low -temperature
superconductors are often used in magnets running at 4 K, but they lose their superconduc-
tivity in high magnetic ... also superconducting. has slightly higher
and than was used routinely in the inner core of composite magnets to
achieve higher fields. has which is appreciably higher than the 18 K of
has been...
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- 1.1K
- 0
carbon nanotube array thermal interfaces for high temperature silicon carbide devices
Ngày tải lên :
06/05/2014, 08:53
... high-
temperature, photoacoustic
INTRODUCTION
Silicon carbide (SiC) electronic devices hav e developed such that commercial
products are now available. SiC is preferred in high- temperature, high- power, ... SiC devices at temperatures as high
as 500–600
C, while Si is generally limited to 125
C.
While the foregoing discussion highlights the advantage of SiC over Si for high-
temperature applications, ... which
exhibited higher noise levels at elevated temperatures as indicated by the larger error
bars for higher temperatures in the graphical results that follow.
Figure 2. Modified photoacoustic...
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Báo cáo hóa học: " Self-propagating high-temperature synthesis of nano-TiCx particles with different shapes by using carbon nano-tube as C source" doc
Ngày tải lên :
21/06/2014, 00:20
... TiB
2
powder by a self-propagating high- temperature
synthesis technique. Mater Lett 2004, 58:733-738.
13. Khanra AK, Pathak LC, Mishra SK, Godkhindi MM: Self-propagating -high-
temperature synthesis (SHS) ... nano-size ZrB
2
powder by self-
propagating high- temperature synthesis. J Eur Ceram Soc 2009,
29:1501-1506.
15. Nersisyan HH, Lee JH, Won CW: Self-propagating high- temperature
synthesis of nano-sized ... combustion temperatures
are quite low. As another consequence of the high C
concentration, the stoichiometry of these primitively
formed TiC
x
particles in the Fe melt is relatively high.
Then,...
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Báo cáo hóa học: " Study of the formation processes of gold droplet arrays on Si substrates by high temperature anneals" docx
Ngày tải lên :
21/06/2014, 05:20
... of catalytically
active nanoislands for the growth of Si wire-like crystals.
Fast anneals at high temperatures o f the structures of
Si substrates with gold films deposited on them both in
furnace ... not observed at any rate up
to the temperature of 950°C (see Figure 5). Instead, the
individual intergrain boundaries often form joints 120°j
for the mentioned temperatures, indicating a steady-
state ... process.
Increase in th e RTA temperature result ed in t he for-
mation of gold nanoislands on the surface of Si wafers.
Thesizeandthedensityofislandsweredeterminedby
the annealing temperature (Figures...
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Research for Agricultural Sciences:" Effect of high temperature fluidized drying and tempering on head rice yield and mechanical strength of Vietnamese rice varieties " doc
Ngày tải lên :
21/06/2014, 06:20
... low temperature drying at 35
o
C, the mechanical strength of the rice kernels
was higher at high temperature drying (Table 2, Figure 8). This value was significantly higher at
90
o
C drying temperature ... drying process.
High temperature (over 100
0
C) fluidized bed drying of paddy has been reported by a few
researchers. But, normally it is recommended that hot air drying temperature should ... for 25-30 minutes if high temperature drying is used (Poomsa-ad et al. 2005;
Prachayawarakorn et al. 2005). Although there are a few research works being reported on high
temperature fluidized...
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Báo cáo hóa học: " High-Temperature Stable Operation of Nanoribbon Field-Effect Transistors" pot
Ngày tải lên :
21/06/2014, 08:20
... than that in method (1) at elevated
temperatures of 125 and 150°C.
Conclusions
In summary, we report the constant temperature operation
of nanoribbon FETs in the temperature range of 25–150°C.
In ... field-effect transistors can be used for stable high-
temperature applications. The on-current level of the
nanoribbon FETs decreases at elevated temperatures due to
the degradation of the electron ... in
response to temperature variations [10–13]. However, the
reduction in mobility induced by the thermal scattering
causes the operation points of the device to vary with the
temperature. This temperature- dependent...
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Báo cáo hóa học: " Nanostructured Hypoeutectic Fe-B Alloy Prepared by a Self-propagating High Temperature Synthesis Combining a Rapid Cooling Technique" ppt
Ngày tải lên :
22/06/2014, 01:20
... Á
Self-propagating high temperature synthesis (SHS) Á
Soft magnetic performance Á Mechanical behavior
Introduction
Nanostructured materials have been shown to exhibit out-
standing high strength and ... 4:11–16
123
NANO EXPRESS
Nanostructured Hypoeutectic Fe-B Alloy Prepared by
a Self-propagating High Temperature Synthesis Combining
a Rapid Cooling Technique
Licai Fu Æ Jun Yang Æ Qinling Bi Æ ... synthesized bulk nano-
structured Fe
94.3
B
5.7
alloy using the one-step approach of a
self-propagating high temperature synthesis (SHS) com-
bining a rapid cooling technique. This method is
convenient,...
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Báo cáo khoa học: Sub-zero temperature inactivation of carboxypeptidase Y under high hydrostatic pressure pot
Ngày tải lên :
08/03/2014, 10:20
... regions of the water: the innermost (region A)
water is highly immobilized, the second (region B) in which
the water is less ice-like, and the third (region C) contains
normalwater.BecauseLi
+
and ... molecules
It is suggested that water molecules tend to form highly
ordered clusters with enhanced hydrogen bond interactions
under cold temperature [19]. Formation of such water
clusters causes weaker ... properties under the high
pressure conditions, i.e. changes in solubility and critical
micelle concentration (CMC), is desired.
Effects of subzero temperature and high pressure
on water molecules
It...
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gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature
Ngày tải lên :
19/03/2014, 16:48
... surface. So, at high working temperature such as
600 °C, there is large number of adsorbed oxygen ions at the sur-
face. And it makes the high surface density of adsorbed oxygen ions
and high sensitivity ... TiO
2
sen-
sors had a higher sensitivity to NO
2
than that of a pure TiO
2
sensor.
Generally, the sensing film with a smaller grain size has a larger
surface area of the sensing film and higher sensitivity ... There-
fore, at 600 °C, the 15 wt.% WO
3
doped TiO
2
sensor had the highest
sensitivity (145.4) due to its relatively small grain size.
Due to its highest sensitivity to NO
2
, the 15 wt.% WO
3
doped
TiO
2
sensor...
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Báo cáo khoa học: A new sulfurtransferase from the hyperthermophilic bacterium Aquifex aeolicus Being single is not so simple when temperature gets high potx
Ngày tải lên :
30/03/2014, 03:20
... phenylthiohydantoin derivates was
done by high- pressure liquid chromatography (Waters,
Manchester, UK) monitored by a data and chromatogra-
phy control station (Waters).
Molecular mass determination
MALDI-MS ... nd
Table 3. Temperature dependence of thiosulfate rhodanese
sulfurtransferase and polysulfide sulfur rhodanese sulfurtransferase
activities of Aq-477 from A. aeolicus. nd, no data.
Temperature
(°C)
Thiosulfate
rhodanese
sulfurtransferase
activity ... time-correlated
single-photon counting technique. The instrumentation
setup was essentially similar to those previously described
[54,55] with modifications. Briefly, a time-correlated single-
photon counting...
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Báo cáo hóa học: " Strain-induced high ferromagnetic transition temperature of MnAs epilayer grown on GaAs (110)" pptx
Ngày tải lên :
21/06/2014, 05:20
... grown on
GaAs (001), and a-phase can coexist with b-phase to a
higher temperature (remnant magnetizatio n becomes
zero when the temperature reaches 350 K).
Experimental procedure
TheMnAsfilmsweregrownonGaAs(110)andGaAs
(001) ... the
sample from growth temperature to room temperature,
indicating enhancement of crystal quality. The micro-
structure and interface of the MnAs films were character-
ized by high- resolution cross-sectional ... plotted in Figure 4a. The linear decrease
of M
r
at low temperature is caused by thermal fluctua-
tion, while the rapid decreasing at high temperature is
caused by structur al transition from hexagonal...
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