Oxidation heat induced

Red mercuric oxide generally is prepared in one of two ways by the heat-induced decomposition of mercuric nitrate or by hot precipitation. Both methods require careful control of reaction conditions. In the calcination method, mercury and an equivalent of hot, concentrated nitric acid react to form... 

When considering the role of phosphorylation in the regulation of the HS response, it is indeed curious that oxidative stress and heat induce a protein tyrosine phosphatase at the transcriptional level (Keyse and Emslie, 1992). Whether this phosphatase has any role in the regulation of HSF phosphorylation is not known, but it does indicate that both transcriptional and translational regulation of signaling... 

Lynn et al. [71] demonstrated the damaging effect of arsenite on DNA. It has been shown that arsenite at low concentrations increased DNA oxidative damage in vascular smooth muscle cells (VSMCs) that can be a cause of arsenite-induced atherosclerosis. Bruskov et al. [72] found that heat induced the formation of 8-oxoguanine in DNA solution at pH 6.8, which was supposedly mediated by oxygen radicals. 

Even though the vacuum-oriented surface techniques yield much useful information about the chemistry of a surface, their use is not totally without problems. Hydrated surfaces, for example, are susceptible to dehydration due to the vacuum and localized sample heating induced by x-ray and electron beams. Still, successful studies have been conducted on aquated inorganic salts (3), water on metals (3), and hydrated iron oxide minerals (4). Even aqueous solutions themselves have been studied by x-ray photoelectron spectroscopy (j>). The reader should also remember that even dry samples can sometimes undergo deterioration under the proper circumstances. In most cases, however, alterations in the sample surface can be detected by monitoring the spectra as a function of time of x-ray or electron beam exposure and by a careful, visual inspection of the sample. 

Fig. 4.4. a-d Laser-induced time-resolved luminescence spectra of apatite with uranyl (a-c) and luminescence (d) after oxidizing heating (possibly in fluorite inclusions)... 

Determination of the antioxidant activity in the system comprising p-carotene and linoleic acid is based on competitive oxidation of p-carotene during heat-induced auto-oxidation of hnoleic... 

The flavor compounds of the crust from the chemically leavened model bread were then compared to those recently identified (6) in the crust of a standard wheat bread which was leavened by addition of yeast (Table I). One striking difference was that Acp (No. 16), which showed the highest FD-factor in the yeast-leavened bread showed a very low FD-factor in the chemically leavened bread. This indicated, that the flour contained only minor amounts of the precursor (s) for the formation of Acp. On the other hand, 2(E),4(E)-decadienal, 2(E),4(E)-nonadienal, l-octen-3-one and 2(Z)-nonenal, which are undoubtedly formed by a heat-induced oxidative degradation of the flour lipids, became predominant odorants in the chemically leavened compared to the yeast-leavened bread. 

Formation of protecting surface layer before or after ignition being in competition with the heat-induced decomposition of the polymer chains and oxidation of the formed fragments by radical process... 

The heat induced into the workpiece will conduct instantly into the adhesive, providing the catalyst for cure. If one of the two substrates is not electrically conductive, then an adhesive can be used that includes a small percentage of metal oxide. The metal oxide particles within the adhesive become heated in the induction field and provide the source of heat to cure the matrix material in the adhesive. (See Fig. 14.5.)... 

Thermal oxidation An oxidation reaction induced by heat. 

J. Huot, F. Houle, F. Marceau, J. Landry, Oxidative stress-induced actin reorganization mediated by the p38 mitogen-activated protein kinase/heat shock protein 27 pathway in vascular endothelial cells, Circ Res 80,383-392(1997). 

When muscat juices were heated under similar conditions a significant enhancement in concentration of volatile monoterpenes was observed. With the notable exceptions of a-terpineol, llnalool, nerol, geraniol and the pyran ring llnalool oxides most of the heat-induced terpenoids of the juices could be attributed to rearrangement products of grape polyols (18). 

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