Results 251 to 260 of about 79,822 (299)

Polychlorinated biphenyl compounds in milk and dairy products

Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung, 1980
The PCB content of 469 milk and dairy product samples was determined. The fat was extracted and cleaned up through aluminium oxide. The organochlorine pesticides and the PCBs were separated by chromatography through a silica gel column. The PCBs in the purified extracts were perchlorinated to decachlorobiphenyl and determined by gas chromatography. The
Roland Renterghem, Luc Devlaminck
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Reactions of lithium-biphenyl adducts with carbonyl compounds

Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 1966
1. The reactions of lithium-biphenyl adducts in tetrahydrofuran solution with acetaldehyde, benzaldehyde, acetone, cyclohexanone, and ethyl octanoate were carried out. 2. The reaction of lithium-biphenyl adducts with carbonyl compounds takes two courses: condensation of the carbonyl compounds, and organolithium synthesis with formation ...
E. P. Kaplan, Z. I. Kazakova, E. D. Lubuzh, A. D. Petrov   +3 more
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Triplet triplet absorption of biphenyl and related compounds

Chemical Physics Letters, 1974
Abstract Triplet triplet absorption spectra of biphenyl, carbazole and phenanthrene have been studied in rigid glass at 77 K. Oscillator strengths and polarizations are reported. A theoretical study has been performed using the Pariser-Parr-Pople approximation in order to support the band assignments.
D. Lavalette, C. Tetreau
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OPTICAL STABILITY IN BIPHENYL, PHENYLPYRIDYL, AND BIPYRIDYL COMPOUNDS

Canadian Journal of Research, 1950
Comparable ortho-substituted compounds of the biphenyl, 2-phenylpyridyl, and 2,2′-bipyridyl type have been synthesized and resolved, and the resistance to racemization determined. The results are as would have been predicted on geometrical considerations only, the compounds containing nitrogen atoms in the rings not behaving in any abnormal manner.
D. Aziz, J. G. Breckenridge
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Biphenyl tricyclic quinazoline compounds

2012
The invention is directed to certain novel compounds with biphenyl tricyclic quinazoline structure. Specifically, the invention is directed to compounds of formula (I) and salts thereof. The compounds of the invention are multiple inhibitors of tyrosine kinase activity.
CHILIN, ADRIANA, MARZARO, GIOVANNI, GUIOTTO, ADRIANO, CONCONI, MARIA TERESA, CASTAGLIUOLO, IGNAZIO   +4 more
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High-speed liquid chromatography of polychlorinated biphenyls and related compounds

Journal of Chromatography A, 1976
High-speed liquid chromatography in the system silica gel-dry n-hexane has been used to characterize the behaviour of a series of commercially available mixtures of chlorinated biphenyls, viz., Aroclor 1221-1268. An attempt has been made to assign a large number of peaks in the chromatograms of the Aroclors to the individual constituents.
U A, Brinkman, J W, Seetz, H G, Reymer
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Multidimensional capillary gas chromatography of polychlorinated biphenyl marker compounds

Journal of High Resolution Chromatography, 1996
AbstractMultidimensional chromatography was used to resolve the specific chlorobiphenyl (CB) congeners 28, 52, 101, 118, 138, 153, and 180 in technical aroclor standards. Single column analysis of polychlorinated biphenyls (PCBs) results in co‐elution of key congeners with other components in the mixture; therefore using two columns of different ...
Russell M. Kinghorn, Philip J. Marriott, Mark Cumbers   +2 more
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Mirex-induced suppression of biliary excretion of polychlorinated biphenyl compounds

Toxicology and Applied Pharmacology, 1976
Abstract Isolated perfused rat liver preparations were utilized to study the drug-induced modification of biliary excretion of [ 14 C]4-chlorobiphenyl (1-CB) and [ 14 C]2,4,5-2′,4′,5′-hexachlorobiphenyl (6-CB) and their metabolites. The effect of pretreatment of rats with mirex was compared with that of phenobarbital (PB) and 6-CB by measuring the ...
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Synthesis and Optical Properties of a Biphenyl Compound

2014
9, 11, Walailak Journal of Science and ...
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New Compounds. Some Derivatives of Biphenyl

Journal of the American Chemical Society, 1951
Paul Fanta, Martin Shatavsky
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