Results 311 to 320 of about 539,111 (359)

Thermal decomposition of developing enamel

Calcified Tissue International, 1990
The decomposition of forming, maturing, and mature enamel was studied between room temperature and 1,000 degrees C by powder X-ray diffraction and infrared absorption methods. In mature dental enamel, carbonate decomposition proceeds relatively fast until 500 degrees C and at a slower rate beyond it.
I, Mayer, S, Schneider, M, Sydney-Zax, D, Deutsch   +3 more
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Thermal Decomposition of Potassium Perchlorate

Nature, 1950
PERCHLORIC acid is often determined as potassium chloride by repeated ignition of potassium perchlorate, mixed with excess ammonium chloride and in presence of platinum as catalyst. It is currently assumed that the reducing agent is the ammonia, though K. A. Hofmann and W. Linnmann1 have shown that gaseous ammonia does not reduce perchlorate below 430°
A, GLASNER, L, WEIDENFELD
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Unimolecular thermal decomposition of dimethoxybenzenes

The Journal of Chemical Physics, 2014
The unimolecular thermal decomposition mechanisms of o-, m-, and p-dimethoxybenzene (CH3O-C6H4-OCH3) have been studied using a high temperature, microtubular (μtubular) SiC reactor with a residence time of 100 μs. Product detection was carried out using single photon ionization (SPI, 10.487 eV) and resonance enhanced multiphoton ionization (REMPI) time-
David J, Robichaud, Adam M, Scheer, Calvin, Mukarakate, Thomas K, Ormond, Grant T, Buckingham, G Barney, Ellison, Mark R, Nimlos   +6 more
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Thermal Decomposition of Pentacene Oxyradicals

The Journal of Physical Chemistry A, 2011
The energetics and kinetics of the thermal decomposition of pentacene oxyradicals were studied using a combination of ab initio electronic structure theory and energy-transfer master equation modeling. The rate coefficients of pentacene oxyradical decomposition were computed for the range of 1500-2500 K and 0.01-10 atm and found to be both temperature ...
Xiaoqing, You, Dmitry Yu, Zubarev, William A, Lester, Michael, Frenklach   +3 more
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Thermal decomposition of GaAs nanowires

Nanotechnology, 2019
The realization of GaAs nanowire (NW) high-performance quantum devices operated at room temperatures requires that their diameters have to be less than 10 nm. It is shown, that the GaAs NWs with sub 10 nanometers diameters can be fabricated using the thermal decomposition technique.
Igor Ilkiv, Demid Kirilenko, Konstantin Kotlyar, Alexey Bouravleuv   +3 more
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Thermal Decomposition Mechanism of Disilane

The Journal of Physical Chemistry A, 2006
Thermal decomposition of disilane was investigated using time-of-flight (TOF) mass spectrometry coupled with vacuum ultraviolet single-photon ionization (VUV-SPI) at a temperature range of 675-740 K and total pressure of 20-40 Torr. Si(n)H(m) species were photoionized by VUV radiation at 10.5 eV (118 nm). Concentrations of disilane and trisilane during
Kazumasa, Yoshida, Keiji, Matsumoto, Tatsuo, Oguchi, Kenichi, Tonokura, Mitsuo, Koshi   +4 more
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Thermal Decomposition of Thonzonium Bromide

Pharmaceutical Research, 1986
Thonzonium bromide, a quaternary ammonium compound used as a surface active agent in a phenylephrine nasal solution, gave a gas chromatographic peak which was proportional in height and area to its concentration. Quaternary ammonium salts are nonvolatile and polar, thus the peak was attributed to a thermal decomposition product.
L, Chafetz, R C, Greenough, J, Frank
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Thermal Decomposition of Some Antibiotics

Nature, 1958
As part of our programme on the thermal decomposition of antibiotics1, additional studies have been made to include the antibiotics, aureomycin (chlortetracycline), terramycin and tetracycline.
W W, WENDLANDT, M, ZIEF
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Thermal decomposition processes in polycarbonates

Polymer Degradation and Stability, 1989
The thermal decomposition mechanisms of some polycarbonates have been investigated by direct pyrolysis mass spectrometry. The results indicate that aliphatic polycarbonates decompose by intramolecular exchange processes which produce cyclic compounds as primary pyrolysis products.
Giorgio Montaudo, Concetto Puglisi, Filippo Samperi   +2 more
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THE THERMAL DECOMPOSITION OF CARBOHYDRATES

Canadian Journal of Research, 1948
The thermal decompositions of cellobiose, maltose, dextrose, and potato starch have been studied over a temperature range, by following the production of volatile products. Carbon dioxide, carbon monoxide, and water with small quantities of acids, aldehydes, and volatile solids were produced in all cases.
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