(n.) A crystallized substance, resembling camphor, obtained from the Asarum Europaeum; -- called also camphor of asarum.
Example Sentences:
(1) Up to 0.1 mL of plasma containing asarone was deproteinated by acetonitrile, which contained an internal standard (indomethacin).
(2) A simple and sensitive high-performance liquid chromatography (HPLC) method for the determination of asarone in rabbit plasma has been developed.
(3) This technique has already found wide application in medical and environmental fields, and some examples of its application to alcoholic beverages are given: detection and determination of possible contaminants, such as phthalate, esters residual monomers from plastic materials (styrene, vinyl chloride), and traces of pesticides; determination of certain non-volatile compounds in wines; and the selective determination of certain compounds for which levels in finished products are limited such as the thujones, safrole, beta-asarone, and coumarine.
(4) In its pharmacological properties the studied asarone is identical with asarone obtained from Acorus calamus and Guatteria.
(5) The extract exhibited a large number of actions similar to alpha-asarone (an active principle of A. calamus) but differed from the latter in several other respects including the responses to electroshock, apomorphine- and isolation-induced aggressive behaviour, amphetamine toxicity in aggregated mice, behavioural despair syndrome in forced swimming, etc.
(6) Furthermore, precocene II (6,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran), a cyclic propenylic plant metabolite and asarone analogue, showed strong hepatocarcinogenic activity similar to that of 1'-hydroxy-2',3'-dehydroestragole and 1'-hydroxy-2',3'-dehydrosafrole; precocene I (the 7-methoxy analogue of precocene II) was less active than precocene II but more active than cis-asarone.
(7) Wine samples containing beta-asarone (cis-2,4,5-trimethoxy-l-propenylbenzene) are distilled; beta-asarone is extracted by hexane and then quantitatively determined by gas-liquid chromatography (GLC), using ethyl palmitate as the internal standard.
(8) The plasma disposition at each dose fitted well to a two-compartment open model and the terminal disposition became much slower as the dose was increased, suggesting a nonlinear dose-dependent plasma asarone disposition.
(9) It was applied to pharmacokinetic studies of asarone in rabbit, after 5, 10, or 20 mg kg-1 intravenous administration.
(10) In contrast, the propenylic derivatives cis- and trans-asarone (1-propenyl-2,4,5-trimethoxybenzene) were each active; the hepatocarcinogenicities of the asarones were not inhibited by prior administration of pentachlorophenol, a sulfotransferase inhibitor that abolished the hepatocarcinogenicity of estragole under the same conditions.
(11) The effect of alpha-asarone, a chemical with hypocholesterolemic properties extracted from Guatteria gaumeri, on SCE induction was studied both in human lymphocytes in vitro and in murine bone marrow cells in vivo.
(12) In acute and chronic experiments on mice, rats, cats and rabbits in a wide range of tests, a study was conducted of the biological properties of alpha-asarone (1-propenyl-2,4,5- methoxybenzol)--etherophenol, isolated by the authors from the roots of Asarum europaeum.
(13) The ultraviolet spectra of beta-asarone and its isomer were also determined.
(14) The gas-liquid chromatographic determination of beta-asarone (cis-2,4,5-trimethyoxy-1-propenylbenzene) in wine was collaboratively studied by 9 analysts.
(15) The embryotoxicity and teratogenicity of alpha-asarone were investigated in mice.
(16) Mass spectrometry confirmed the identity of the GLC peak as beta-asarone.
(17) From the ethyl acetate extract of Asarum forbesii Maxin, four new constituents, asarumin A(I), B(II), C(III) and D(IV), were isolated along with elemicin (V), trans-asarone(VI) and linoleic acid(VII).
Ether
Definition:
(n.) A medium of great elasticity and extreme tenuity, supposed to pervade all space, the interior of solid bodies not excepted, and to be the medium of transmission of light and heat; hence often called luminiferous ether.
(n.) Supposed matter above the air; the air itself.
(n.) A light, volatile, mobile, inflammable liquid, (C2H5)2O, of a characteristic aromatic odor, obtained by the distillation of alcohol with sulphuric acid, and hence called also sulphuric ether. It is powerful solvent of fats, resins, and pyroxylin, but finds its chief use as an anaesthetic. Called also ethyl oxide.
(n.) Any similar oxide of hydrocarbon radicals; as, amyl ether; valeric ether.
Example Sentences:
(1) It was shown in experiments on four dogs by the conditioned method that the period of recovery of conditioned activity after one hour ether anaesthesia tested 7 to 7.5 days.
(2) After 3 and 6 months, blood collected by cardiocentesis using ether anesthesia and then sacrificed to remove CNS and internal organs.
(3) Glycosyl ceramide concentration was determined by gas-liquid chromatography of the trimethylsilyl ethers of the methyl glycosides.
(4) Ether extracts were analyzed by gas chromatography-mass spectrometry (GC-MS) and various chlorinated and non-chlorinated compounds were detected, e.g.
(5) 1 Rats were convulsed once daily for 7 days by exposure to the inhalant convulsant agent, flurothyl (Indoklon, bis (2,2,2-trifluouroethyl)ether).
(6) No impurities in the technical grade ether influenced the responses.
(7) Depletion of extracellular Ca2+ by EGTA [ethylene glycol-bis(beta-aminoethyl ether)-N,N,N'N'-tetraacetic acid] attenuated both [Ca2+]i increase and superoxide production induced by particles.
(8) It was presumed that thymohydroquinone is excreted as ethereal sulfuric acid conjugate in man.
(9) The authors have carried out an experimental study of an insufficiently explored problem of the diffusion capacity of the ethers of cholesterol through the skin and the possibility of their intra-articular transport with cholesterol ether of the oleic acid marked 1,2(3)H taken as an example.
(10) Chelation of extracellular calcium with ethyleneglycol-bis(beta-aminoethyl ether)N,N,N',N' tetraacetic acid (EGTA) did not abolish the increase in calcium.
(11) The UE and KE fractions were then separated by silicic acid column chromatography with a stepwise elution method using ether-hexane.
(12) The enzyme appears to be highly specific since D-dopachrome, alpha-methyldopachrome, dopaminochrome, adrenochrome methyl ether and deoxyadrenochrome are not substrates.
(13) After introduction of surgical anesthesia with general agents such as ether and chloroform, a large number of deaths due to anesthetic toxicity were reported.
(14) Data of ether-extracted total fat content versus data of fat marbling planimetry correlated well with r = 0.9.
(15) When the enzyme is inactivated with 16alpha-[2-3H]bromoacetoxyestradiol 3-methyl ether, amino acid analysis of acid hydrolysates reveals 3-carboxymethylhistidine and 1,3-dicarboxymethylhistidine.
(16) In addition these methods of estrogen treatment potentiated the ether-induced increase in plasma prolactin in the morning (9.00-11.00) beginning on week 2 and continuing for 3-8 weeks.
(17) 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.
(18) The biologically inactive phorbol ester 12-O-tetradecanoyl phorbol-13-acetate methyl ether (10 nM) had no effect on 45Ca2+ uptake.
(19) Steroids were extracted with ethyl ether, and cortisol was purified by gel column chromatography prior to assay.
(20) The method comprised adsorption on Extrelut column from alkaline plasma, elution with diethyl ether-methylene chloride, evaporation in the presence of 0.01 M hydrochloric acid and injection of the acid solution onto a mu Bondapak C18 column, using acetonitrile-0.025 M potassium dihydrogenphosphate as mobile phase and ultraviolet detection at 210 nm.