Oxide identification

Baker, D. L. et al. (1999). Reactions of beta-carotene with cigarette smoke oxidants. Identification of carotenoid oxidation products and evaluation of the prooxidant antioxidant effect. Chem. Res. Toxicol. 12(6) 535-543. Bonnie, T. Y. P. and Y. M. Choo (1999). Oxidation and thermal degradation of carotenoids. J. Oil Palm Res. 11(1) 62-78. 

Papile, C. X, and Gates, B. C., Rhenium subcarbonyls on magnesium oxide Identification of the surface oxo and hydroxo ligands by infrared spectroscopy. Langmuir 8,74 (1992). 

Potter, R. M. and G. R. Rossman. 1979a. The tetravalent manganese oxides Identification, hydration, and structural relationship by infrared spectroscopy. Am. Miner. 64 1199-1218. 

Potter, R.M. Rossman, G.R. (1979c) The tetravalent manganese oxides identification, hydration, and structural relationships by infrared spectroscopy. American Mineralogist M, 1199-1218. 

Baxter J.E., Davidson R.S., Hagemann H.J. and Overeem T. (1988) Photoinitiators and photoinitiation, 8. The photoinduced a-cleavage of acylphosphine oxides. Identification of the initiating radicals using a model substrate. Makromol. Chem., 189, 2769-2780. 

DOT Label Oxidizer, Identification Numbers, UN 2015 for solution greater than 52%... 

Corrosion Thickness and composition of surface oxides Identification of corrosive elements (e.g.. Cl) Passivation layer composition and thickness... 

Oxide Identification. The X-ray diffraction patterns for the various crystalline forms of Ge02 can be f°un< in ASTM card files (52). As with SiO, no crystalline structure has been observed for the GeO monoxide phase. 

For oxide identification, JCPDS database system [19] was used and phases were identified comparing with 26 and intensities of reflection. Table 2.11 indicates the test plan of XRD for rust analysis at different stages. 

Dolensky B, Kvicala J, Palecek J, Paleta O (2002) Methyl 3,3,3-tiifluoropyruvate an improved procedure starting from hexafluoropropene-1,2-oxide identification of byproducts. JHuorChem 115 67-74... 

Pazos, M. Pereira da Rocha, A. Roepstorff, R Rogowska-Wrzesinska, A. Fish proteins as targets of ferrous-catalyzed oxidation Identification of protein carbonyls by fluorescent labeling on two-dimensional gels and MALDI-TOF/TOF mass spectrometry. J. Agric. Food Chem. 2011,59,7962-7977. 

Figure Bl.25.9(a) shows the positive SIMS spectrum of a silica-supported zirconium oxide catalyst precursor, freshly prepared by a condensation reaction between zirconium ethoxide and the hydroxyl groups of the support [17]. Note the simultaneous occurrence of single ions (Ff, Si, Zr and molecular ions (SiO, SiOFf, ZrO, ZrOFf, ZrtK. Also, the isotope pattern of zirconium is clearly visible. Isotopes are important in the identification of peaks, because all peak intensity ratios must agree with the natural abundance. In addition to the peaks expected from zirconia on silica mounted on an indium foil, the spectrum in figure Bl. 25.9(a)...

The effects of uv radiation on V/-nitroso compounds depend on the pH and the medium. Under neutral conditions and ia the absence of radical scavengers, these compounds often appear chemically stable, although the E—Z equiUbrium, with respect to rotation around the N—N bond, can be affected (70). This apparent stabiUty is due to rapid recombination of aminyl radicals and nitric oxide [10102-43-9] formed duting photolysis. In the presence of radical scavengers nitrosamines decay rapidly (71). At lower pH, a variety of photoproducts are formed, including compounds attributed to photoelimination, photoreduction, and photo-oxidation (69). Low concentrations of most nitrosamines, even at neutral pH, can be eliminated by prolonged kradiation at 366 nm. This technique is used ki the identification of /V-nitrosamines that are present ki low concentrations ki complex mixtures (72). 

Product identification does not distinguish OH versus hole oxidation, because the products are identical. For example, the products identified in the photo oxidation of phenol (qv) (Fig. 7) may originate either by OH radical attack of the phenol ring, or by direct hole oxidation to give the cation radical which subsequendy undergoes hydration in solvent water. 

Identification, isolation, and removal of (polyhydroxy)benzenes from the environment have received increased attention throughout the 1980s and 1990s. The biochemical activity of the benzenepolyols is at least in part based on thek oxidation—reduction potential. Many biochemical studies of these compounds have been made, eg, of enzymic glycoside formation, enzymic hydroxylation and oxidation, biological interactions with biochemically important compounds such as the catecholamines, and humic acid formation. The range of biochemical function of these compounds and thek derivatives is not yet fully understood. 

Various combiaations of ceramic—matrix composites have been manufactured at the research level. Their properties are given ia Table 1 for oxide-based matrices and ia Table 2 for aoaoxide matrices. Some commercial products are ideatifted for information only. Such identification does not imply recommendation or endorsement by NIST, nor does it imply that the products are the best available for the purpose. 

Oxides (Ln Oj), fluorides (LnF ), sulfides (Ln S, LnS), sulfofluorides (LnSF) of lanthanides are bases of different functional materials. Analytical control of such materials must include non-destructive methods for the identification of compound s chemical forms and quantitative detenuination methods which does not require analytical standards. The main difficulties of this analysis by chemical methods are that it is necessary to transform weakly soluble samples in solution. 

COLLECTION AND IDENTIFICATION OF BIOACTIVE ORGANIC COMPOUNDS OCCURRING IN RIVERS AND LAKES. ADSORPTION SELECTIVITY OF MONOSACCHARIDES ONTO HYDROUS METAL OXIDES... 

Carbocations can also be generated during the electrolysis, and they give rise to alcohols and alkenes. The carbocations are presumably formed by an oxidation of the radical at the electrode before it reacts or diffuses into solution. For example, an investigation of the electrolysis of phenylacetic acid in methanol has led to the identification of benzyl methyl ether (30%), toluene (1%), benzaldehyde dimethylacetal (1%), methyl phenylacetate (6%), and benzyl alcohol (5%), in addition to the coupling product bibenzyl (26%). ... 

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