(n.) A volatile, very inflammable liquid, C6H6, contained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum.
Example Sentences:
(1) The low affinity of several N1-alkylpyrroleethylamines suggests that the benzene portion of the alpha-methyltryptamines is necessary for significant affinity.
(2) Essential parameters of hepatic functioning in 84 labourers, whose exposition to benzene is differing in assimilation as well as length of time is discussed.--45 persons from the same county without contact to benzene or hepatotoxic agents served as control-group.
(3) In the liver, the major site of benzene metabolism, benzene is converted by a cytochrome P-450-mediated pathway to phenol, the major metabolite, and the secondary metabolites, hydroquinone and catechol.
(4) The significance of the present findings on the mutual suppression of metabolism between benzene and toluene is discussed in relation to solvent toxicology and biological monitoring of exposure to the solvents.
(5) Service station attendants' exposure to benzene, based on 85 TWA results at 7 stations, were well below 1 ppm except one exposure of 2.08 ppm.
(6) For cases where background contamination could not be adequately controlled, the assay was modified for the quantitative determination of labelled benzenes six mass units heavier than natural benzene (benzene-d6 or benzene-13C6).
(7) We have investigated the whole-body dermal penetration of styrene, xylene, toluene, perchloroethylene, benzene, halothane, hexane, and isoflurane in rats and compared the permeability constants with available human studies on vapor penetration.
(8) Numerical and structural chromosome changes in bone marrow cells have been described in subjects with benzene haemopathy.
(9) On the other hand, Sudan III pretreatment suppressed benzene-induced CA at all periods after the benzene injection.
(10) Benzene is the only chemical agent for which strong evidence of leukaemogenesis exists.
(11) 14C-Methylthio-labelled 2-methylthio-4-ethylamino-6-tert-butylamino-sym-triazine (terbutryn), pentachlorothioanisole (PCTA), and 1,4-bis(methylthio)tetrachloro-benzene (bis-MTTCB) and their methylthio-oxidation congeners were reacted with glutathione (GSH) in the presence and absence of immobilized liver microsomal enzymes.
(12) The drug is extracted from buffered plasma at pH 9.0 with benzen.
(13) Laser photolysis techniques have been used to characterize the reactivity of triplet state lipoidal benzophenone derivatives toward fatty acids and glycerides in benzene solution.
(14) In experiments in vitro, neither benzene, toluene nor xylene changed the number of sister-chromatid exchanges (SCEs) or the number of chromosomal aberrations in human lymphocytes.
(15) The compound is extracted from aqueous solution with benzene and cleaned up by liquid chromatography.
(16) In pursuing the study on pyridodiazepinone derivatives, in order to verify the variation of biological activity induced by replacement of the heteroaromatic with an aromatic nucleus and by the introduction of chlorine on the benzene ring, a series of 1-[(dialkylamino)alkyl]-4-phenyl-1,3-dihydro-2H-1,4-benzodiazepin- 2-ones and of 7-chloro-analogues were prepared.
(17) Benzene toluene, styrene, 1,1,1-trichloroethylene, and tetrachloroethylene are taken as examples of solvents showing various toxicokinetic properties.
(18) DAS protected the anion exchange system not only against inhibition by DNFB but also by m-isothiocyanato benzene sulfonic acid.
(19) The m-xylene-adapted microorganisms in the aquifer column degraded toluene, benzaldehyde, benzoate, m-toluylaldehyde, m-toluate, m-cresol, p-cresol, and p-hydroxybenzoate but were unable to metabolize benzene, naphthalene, methylcyclohexane, and 1,3-dimethylcyclohexane.
(20) Anticonvulsant activity and toxicity of 20 arylsuccinimides were quantitatively correlated with the hydrophobic, electronic and steric parameters of the substituents in the benzene ring and at the nitrogen atom.
Single
Definition:
(a.) One only, as distinguished from more than one; consisting of one alone; individual; separate; as, a single star.
(a.) Alone; having no companion.
(a.) Hence, unmarried; as, a single man or woman.
(a.) Not doubled, twisted together, or combined with others; as, a single thread; a single strand of a rope.
(a.) Performed by one person, or one on each side; as, a single combat.
(a.) Uncompounded; pure; unmixed.
(a.) Not deceitful or artful; honest; sincere.
(a.) Simple; not wise; weak; silly.
(v. t.) To select, as an individual person or thing, from among a number; to choose out from others; to separate.
(v. t.) To sequester; to withdraw; to retire.
(v. t.) To take alone, or one by one.
(v. i.) To take the irrregular gait called single-foot;- said of a horse. See Single-foot.
(n.) A unit; one; as, to score a single.
(n.) The reeled filaments of silk, twisted without doubling to give them firmness.
(n.) A handful of gleaned grain.
(n.) A game with but one player on each side; -- usually in the plural.
(n.) A hit by a batter which enables him to reach first base only.
Example Sentences:
(1) The influence of the various concepts for the induction of lateral structure formation in lipid membranes on integral functional units like ionophores is demonstrated by analysing the single channel current fluctuations of gramicidin in bimolecular lipid membranes.
(2) Renal micropuncture and microdissection techniques with ultramicro fluid analysis have been applied to evaluate single nephron function in the skate, Raja erinacea.
(3) Single-case experimental designs are presented and discussed from several points of view: Historical antecedents, assessment of the dependent variable, internal and external validity and pre-experimental vs experimental single-case designs.
(4) Microionophoretically applied excitatory amino acids induced firing of extracellularly recorded single units in a tissue slice preparation of the mouse cochlear nucleus, and the similarly applied antagonist 2-amino-5-phosphonovalerate (2APV) was demonstrated to be a selective N-methyl-D-aspartate (NMDA) receptor antagonist.
(5) The coefficient of variation in the integrated area of a single peak is 16%.
(6) The diffusion of Myocamicin in the prostatic tissue of patients undergoing prostatectomy after a single oral dose of 600 mg has been studied.
(7) Infection with opportunistic organisms, either singly or in combination, is known to occur in immunocompromised patients.
(8) Radioligand binding studies revealed the presence of a single class of high-affinity (Kd = 2-6 X 10(-10) M) binding sites for ET-1 in both cells, although the maximal binding capacity of cardiac receptor was about 6- to 12-fold greater than that of vascular receptor.
(9) Pituitary weight, mitotic index and chromosomes were studied in male rats following a single or repeated dose of estradiol-benzoate for a total period of 210 days.
(10) The manufacturers, British Aerospace describe it as a "single-seat, radar equipped, lightweight, multi-role combat aircraft, providing comprehensive air defence and ground attack capability".
(11) Cop rats, however, possess a single 'suppressor' gene which confers complete resistance to mammary cancer.
(12) Comparison if single injections of MSB and atropine in normal subjects also demonstrated a more reliable dose-response relationship with MSB.
(13) Since interferon alfa-2b (Intron A) is useful as a single agent, it is important to determine if interferon can be combined with standard chemotherapy to improve both response and survival in patients with cancer.
(14) This suggests that Mg2+ accelerated both reactions from a single class of site.
(15) In crosses between inverted repeats, a single intrachromatid reciprocal exchange leads to inversion of the sequence between the crossover sites and recovery of both genes involved in the event.
(16) Median effect analysis was applied for the evaluation of in vitro effect by the growth inhibition, and the in vivo effect by comparison of the increase of life span (ILS) in a combined group with the sum of ILS's in 2 single agent groups.
(17) Certainly, Saunders did not land a single blow that threatened to stop his opponent, although he took quite a few himself that threatened his titles in the final few rounds.
(18) The results indicated that roughly 25% of patients treated in this way will become hypothyroid after 5 years and that 85% are cured (need no further therapy during the follow-up period) using a single dose of iodine-131.
(19) In the triploids, the 40 female chromosomes present (mouse, n = 20) were derived from a single diploid pronucleus formed after the extrusion of a first polar body, and following the monospermic fertilization of primary oocytes.
(20) Such an approach to investigations into subclinical mastitis is not feasible by means of either single- or double-parameter techniques.