(1) Of 15 organochlorine compounds analyzed, trace amounts mainly of p,p-DDE and polychlorinated biphenyls (PCBs) were detected, but could not be quantitated.
(2) Mutagenicity of MC was increased when homogenates from MC-treated hamsters were used as a source of activating enzymes, and this mutagenicity could be correlated with increased biphenyl 2-hydroxylase activity.
(3) We have investigated the metabolism of polychlorinated biphenyls and endogenous steroids by the major phenobarbital (PB)-inducible hepatic cytochromes P450 in dogs and rats, PBD-2 and PB-B, respectively.
(4) Studies of structure-transacylation relationships for a series of acylhydroxamic acids of chlorinated biphenyl ethers and their related compounds by rat liver N-arylacylhydroxamic acid-dependent N-acyltransferase (AHNAT) are described.
(5) There was an 84% decrease in the yield of microsomal protein, a 64% decrease in cytochrome P-450 content per mg of microsomal protein, and a 36% decrease in the biphenyl 4-hydroxylase specific activity in human cadaver liver that was a few hours old.
(6) Distribution of polychlorinated biphenyls (PCB) in sewage wastes at a municipal sewage treatment plant was studied, showing that the great bulk of PCBs entering such a treatment plant become adsorbed onto the grit chamber solids and the sludge that is passed from the anaerobic digesters.
(7) Certain metabolites of polychlorinated biphenyls (PCBs) are retained in the Clara cells and in the airway lumen of rodent lung due to their interaction with a secretory 13-kDa protein.
(8) The degradation of 3- and 4-HBs by these strains is therefore analogous to the metabolism of biphenyl, 2-HB, and naphthalene in the requirement for 2,3-catechol formation.
(9) They appear to be a dimer, trimer and tetramer in which tyrosine units are linked by biphenyl bonds.
(10) The influence of serum lipids and proteins on partitioning of individual polychlorinated biphenyl (PCB) congener peaks between human serum and adipose tissue lipid was assessed using regression analysis.
(11) Regions were ranked according to the mean concentration of 43 toxic substances (pesticides, polychlorinated biphenyls, semi-volatiles, and volatiles) in human adipose tissue and environmental media (sediment, fish tissue, and groundwater).
(12) Polychlorinated biphenyls are stable, lipophilic industrial compounds that are present in residue levels in human tissue, wildlife, and freshwater sediment.
(13) On the basis of a closeness criterion of 10 (deltaRI = RIa - RIb = 10), those combinations of three or fewer liquid phases which could distinguish between nearly all possible pairs of chlorinated biphenyls were selected.
(14) The toxic effects of the polychlorinated biphenyls upon plasma testosterone levels, the blood coagulation system, the gross- and micropathological changes as well as the extent and differences in their distribution and accumulation were studied.
(15) The efficacy of sulfuric acid cleanup and KOH-ethanol hydrolysis confirmation was studied for 22 organochlorine pesticides and 2 polychlorinated biphenyls (PCBs).
(16) A comparison is made of supercritical fluid extraction (SFE) with two other techniques widely used for the extraction of polychlorinated biphenyls (PCBs) and organochlorine pesticides in soil.
(17) Contamination by industrial chemicals such as polychlorinated biphenyls and polybrominated biphenyls; heavy metals such as lead, cadmium, and mercury; and pesticides such as dieldrin and chlordane exemplify the problem in feeds and the resulting problem of tissue residues in human foods.
(18) The effect of polychlorinated biphenyls, gamma-hexachlorocyclohexane and the effect of a combination of these substances on the regulation of 3-hydroxy-3-methylglutaryl coenzyme A reductase were investigated.
(19) Experimental studies have demonstrated that certain types of commercially produced polychlorinated biphenyls (PCBs) are carcinogenic.
(20) The livers, lungs, and small intestines of untreated rabbits and the livers of control rats were stored intact, or as microsomal suspensions, under liquid nitrogen at -196 degrees C. Aniline hydroxylase, aminopyrine demethylase, benzpyrene hydroxylase, biphenyl hydroxylase, NADPH-cytochrome c reductase, UDP-glucuronyltransferase activities, the microsomal content of cytochrome P-450, and the aniline- and benzphetamine-induced spectral changes were compared in fresh and stored preparations.
Colourless
Definition:
Example Sentences:
(1) The red free radical is readily reduced quantitatively by isoniazid to the colourless chloropromazine.
(2) The end point of serum titration is the last well containing colourless medium.
(3) Based on their spectral transmission, the lenses of 50 teleost species can be classified into three categories: "type 1" colourless lenses with 50% transmission points between 315 and 354 nm, "type 2" lenses which also appear colourless but have 50% cut-off points around 362-405 nm, and "type 3" lenses which are visibly yellow (50% transmission 425-450 nm).
(4) Last September, when Barack Obama's approval ratings were in the low to mid-40s and a clear majority of Americans said he did not deserve a second term, veteran pollster Charlie Cook described his ideal Republican opponent as "odourless and colourless".
(5) Now, with the gruesome killing of Farooq, a senior if largely colourless figure, the bloodshed appears to have spread from Pakistan to the streets of north London.
(6) Eosinophil colonies appear strongly stained in black whereas other types of colonies (neutrophils and macrophages) remain colourless.
(7) Unbound bilirubin is oxidized to nearly colourless substances in the presence of H2O2 or ethyl hydroperoxide and horseradish peroxidase.
(8) Granular cells (cells crowded with colourless granules staining with paraldehyde fuchsin according to Gomori-Gabe and not containing calcium) are independent cells in the connective tissue of Helix pomatia.
(9) Stratum corneum was obtained by tape stripping of volar forearm skin after the skin surface had been painted with colourless nail varnish.
(10) Perfluorodecalin is a clear colourless fluid with high specific gravity.
(11) Normally the synovial fluid of bovines is a clear, colourless or straw coloured, viscous, non-coagulable liquid with a normal mucin precipitate quality.
(12) For Disney animation has a long history of LGBT coding, intended and otherwise, that makes Beauty and the Beast’s more “official” gay gestures look rather colourless.
(13) The larger cysts protruded from the liver surfaces and contained a colourless, clear, serous fluid and caused pathological change in 5-60 per cent of the hepatic parenchyma.
(14) VX, a clear, colourless liquid with the consistency of engine oil, was developed in the UK in the 1950s during research into pesticides but was found to be too toxic to be used safely.
(15) In some organisms, both enzymes are localized in the same region, which finally leads to the formation of hydrasine tetrazolium, a soluble colourless compound, but not of diformazan, an insoluble stained derivative of tetrazolium nitroblue.
(16) Natural water suitable for direct bottling must be clear, colourless, and free from objectionable taste and odour.
(17) In addition to biochemical changes in response to variations in the ratio of availability of various resources (photons, N, P) there are also structural changes; significant here is the increased occurrence of (often colourless) hairs in haptophytes and (probably) of enhanced rhizoid development in rhizophytes.
(18) Puncture produced clear, colourless fluid without signs of inflammatory changes.
(19) We are seeing this level of impact to coral reefs around the world from Hawaii to the Florida Keys, from Madagascar to Indonesia.” He said what he saw in other reefs around the world took his breath away: “Not a fish in site, colourless, ghost-like coral, a complete graveyard.” In response, Queensland’s deputy premier, Jackie Trad, invited DiCaprio to come and see the reef for himself.
(20) It is one of the most powerful explosives made today and is a favourite among terrorists because its colourless crystals are hard to detect in a sealed container.