Results 261 to 270 of about 6,859,118 (305)

Stabilization at high temperatures

Journal of Polymer Science: Polymer Chemistry Edition, 1980
AbstractA general detailed model of polymer oxidative degradation in the presence of a stabilizer‐oxygen acceptor was considered. The motion of the degradation zone boundary and the sample lifetime were obtained for various conditions of the process. In particular, it is shown that within the given concentration immobile oxygen acceptor has the best ...
E. B. Brun, O. A. Shustova, S. I. Kuchanov, G. P. Gladyshev   +3 more
openaire   +1 more source

The temperature stabilization of a borehole

Geophysics, 1981
Abstract Analytic solutions for the temperature stabilization of both square and circular boreholes are considered. It is found that a previously published solution for a square borehole is incorrect in that it does not reproduce the initially assumed conditions.
Y. Leblanc, L. J. Pascoe, F. W. Jones
openaire   +1 more source

Hygrometry with Temperature Stabilization

Journal of Atmospheric and Oceanic Technology, 1985
Abstract A method is presented for stabilizing the temperature of air to allow the use of temperature-sensitive, humidity sensors for direct determination of an invariant humidity characteristic such as specific humidity and/or its fluctuations. Problems connected with such measurements are discussed in detail, and outlines of their theory are given ...
Krzysztof E. Haman, Andrzej M. Makulski
openaire   +1 more source

Determination of sample temperature and temperature stability with 129Xe NMR

Journal of Magnetic Resonance, 2006
The (129)Xe chemical shift of xenon dissolved in isotropic liquids is very sensitive to solvent density, which in turn is dependent on the sample temperature. Therefore, the (129)Xe chemical shift can be used as the basis of a thermometer for measuring actual sample temperatures in NMR experiments.
Jani, Saunavaara, Jukka, Jokisaari
openaire   +2 more sources

Biomolecular stability and life at high temperatures

Cellular and Molecular Life Sciences, 2000
It is not clear what the upper temperature limit for life is, or what specific factors will set this limit, but it is generally assumed that the limit will be dictated by molecular instability. In this review, we examine the thermal stability of two key groups of biological molecules: the intracellular small molecules/metabolites and the major classes ...
R M, Daniel, D A, Cowan
openaire   +2 more sources

Enhanced Stability of a Protein with Increasing Temperature

Journal of the American Chemical Society, 2010
The unusual stability of a structured but locally flexible protein, human growth hormone (hGH) at pH 2.7, was investigated using the temperature dependence of the nanosecond-picosecond dynamics of the backbone amide groups obtained from (15)N NMR relaxation data. It is found that the flexibility of the backbone of the helices decreases with temperature
Vinther, Joachim Møllesøe, Kristensen, Søren M, Led, Jens J   +2 more
openaire   +3 more sources

High‐temperature stability in yttria‐stabilized zirconia

Heat Transfer—Asian Research, 2008
AbstractYttria‐stabilized zirconia has been studied as a candidate standard reference material for the determination of thermal properties. This study evaluated the high‐temperature stability, which is important for yttria‐stabilized zirconia to be used for a standard reference material, using a common material of fine ceramics, Referceram ZR1 ...
openaire   +1 more source

STABILIZATION OF PHYTOCHROME INTERMEDIATES BY LOW TEMPERATURE*

Photochemistry and Photobiology, 1968
Abstract— The photocon versions between the red‐absorbing form (Pr) and the far‐red absorbing form (Pfr) of phytochrome were examined at low temperatures. Partially purified preparations of the chromoprotein were examined in phosphate buffer and in 25 per cent buffer plus 75 per cent glycerol.
L H, Pratt, W L, Butler
openaire   +2 more sources

High Temperature Stability of SmTM Magnets

7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275), 1998
To meet the demand for permanent magnet materials usable up to 450–500 °C, we investigated and reported that a SmTM magnet with a low temperature coefficient of coercivity and a moderately high coercivity has substantially lower irreversible losses at elevated temperatures than conventional Sm2TM17 magnets.
openaire   +1 more source

Stability of Coronene at High Temperature and Pressure

The Journal of Physical Chemistry B, 2010
The infrared response of coronene (C(24)H(12)) under pressure and temperature conditions up to 10 GPa and 300 °C is examined in situ using a diamond anvil cell and synchrotron-source Fourier transform infrared (FTIR) spectroscopy. Coronene is a polycyclic aromatic hydrocarbon that is present in the interstellar medium and meteorites which may have ...
Jennings, E., Montgomery, W., Lerch, Ph.
openaire   +3 more sources