Results 221 to 230 of about 125,176 (265)

Kinetics of Quartz Transformation

Transactions of the Indian Ceramic Society, 1974
The transformations of two varieties of high purity quartz were studied at 1400 and 1500°, the determination of quartz being done by DTA. The transformations were found to be greatly influenced by particle size. The decomposition of fine fractions of quartz followed a spherical model in which the decomposition starting from the surface nucleation ...
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Sorption Kinetics and Transformation of DDT in Sediment

Water, Air, and Soil Pollution, 1999
The overall objective of this study was to investigate the sorption kinetics of DDT in sediment under similar experimental conditions employed in corresponding toxicity studies for bentic organisms. A batch of aerated Schoonrewoerdse Wiel sediment, initially spiked with DDT, was sampled over a period of seven days.
van den Hoop, MAGT, Kreule, P, Loch, JPG
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Kinetics of the η–η′ transformation in Cu6Sn5

Scripta Materialia, 2011
CuSn is an important intermetallic compound used in lead-free soldering and anode materials for Li-ion batteries. Cu Sn exists in at least two crystal structures, with a transformation from hexagonal η-CuSn at temperatures higher than ∼186 °C to monoclinic η′-CuSn at lower temperatures. Using variable temperature synchrotron X-ray diffraction analysis,
Nogita, K., Gourlay, C. M., McDonald, S. D., Wu, Y. Q., Read, J., Gu, Q. F.   +5 more
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Bainitic transformation kinetics and stress assisted transformation

Materials Science and Technology, 2001
Abstract With reference to experimental data, the effects of stress, chemical composition, and transformation temperature on bainitic transformation kinetics are analysed. A decrease of transformation temperature or an increase of carbon equivalent results in a slow rate of bainitic transformation and reduces the promotive effect of stress induced ...
C.C. Liu, K.F. Yao, Z. Liu, X.J. Xu
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A MOLECULAR AND KINETIC ANALYSIS OF ESTROGEN RECEPTOR TRANSFORMATION

Journal of Steroid Biochemistry, 1975
Abstract Recent studies of the uterine estrogen receptor indicate it is a multi-subunit protein. Estradiol and temperature induce a conformational change in the 4 S estrogen-binding protein (EBP) or monomer (mol. wt. 7–8 × 104) as indicated by the high energy of activation (19–21 kcal mol−1) accompanying the formation of the 4S EBP dimer, 5S EBP (mol.
A C, Notides, S, Nielsen
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Transformation kinetics for inhomogeneous nucleation

Acta Materialia, 2009
Abstract A rigorous mathematical approach based on an inhomogeneous (marked) Poisson point process is presented to extend previously proposed treatment of transformation kinetics to situations in which nuclei are not homogeneously located in space.
P. R. Rios, E. Villa
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Kinetics of Physical Transformations

1984
A concrete physical system may change in time. Any such change will be called a process, provided the change exists in every inertial coordinate system. In this broad sense, not only chemical reactions, positron—electron ‘annihilation’, nuclear reactions, etc., but also the emission and absorption of photons, and even a change in a purely mechanical ...
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Kinetics of Phase Transformation—Initial Stage

2020
For a phase to transform, a daughter phase should first be conceived out of the mother phase, which is either via nucleation or via spinodal decomposition. Here, we will learn the classic basic ideas on the kinetics of these two conception processes: one is “small in extent and large in degree” involving downhill diffusion and the other “large in ...
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Kinetics of the calcite ⇌ aragonite transformation

Journal of Geophysical Research, 1965
A beryllium pressure vessel mounted in an X-ray diffractometer has been used to study the rates of the transformation calcite ⇌ aragonite at temperatures to 500°C and pressures to 15 kb. The rates of transformation are shown to be both temperature and pressure dependent.
Briant L. Davis, Leason H. Adams
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Analysis of the kinetics of phase transformations

Journal of Materials Science, 1992
A common basis of reaction-rate theories is discussed for isothermal and non-isothermal transformations. As a result compatible recipes have been obtained for the extraction of kinetic parameters from isothermally and non-isothermally conducted experiments. It follows that so-called Kissinger-like methods for non-isothermal kinetic analysis, originally
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