(n.) A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule.
Example Sentences:
(1) The amount of administered tetrol recovered unchanged ranged from 1 to 88%.
(2) Studies were designed to elucidate the origin of estetrol (15alpha-hydroxyestriol (estra-1,3,5(10)triene-3,15alpha,17beta-tetrol) or E4) during late human pregnancy.
(3) To improve the identification of the DNA adducts formed, an acid hydrolysis technique was used to convert the BPD- and anti-BPDE-deoxyribonucleoside adducts formed in mouse and rat skin to BP tetrols.
(4) Four substances from the urine of a hypertensive newborn girl were partially characterized and shown to be 17alpha-hydroxy-5beta-pregnane-1,3,20-trione, 3alpha,17alpha-dihydroxy-5beta-pregnane-1,20-dione, 3alpha,17alpha,20alpha-trihydroxy-5beta-pregnan-1-one and 5beta-pregnane-1beta,3alpha,17alpha,20alpha-tetrol.
(5) The 5beta-[24-14C]cholestane-3alpha, 7alpha, 25-triol was hydroxylated in the liver at the 12alpha position to yield the corresponding 5beta-cholestane-3alpha, 7alpha, 12alpha, 25-tetrol.
(6) The major ethylacetate extractable metabolites of BP formed by peripheral lung were tetrols and trans-7,8-diol.
(7) and mass-spectral examination of which suggested the structure 5alpha-cholane-3alpha,7alpha,12alpha,24-tetrol.
(8) The following materials were obtained by this method: 5 alpha-anhydrocyprinol, 5 alpha-cholestane-3 alpha,7 alpha,12 alpha,25-tetrol, 5 alpha-cholestane 3 alpha,7 alpha,12 alpha,26-tetrol, an unidentified sterol from the neutral lipid fraction, allocholic acid and allochenodeoxycholic acid from the bile acid fraction.
(9) The major metabolite in all incubations was very similar, but not identical, in chemical and chromatographic properties to 5 beta-pregnane-3 alpha, 6 alpha, 17,20 beta-tetrol.
(10) Thus, this study indicates that 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha, 25-tetrol is an inefficient substrate for cholic acid biosynthesis in man and that the major route of cholic acid synthesis probably involves the 26-hydroxylated intermediate.
(11) Small amounts of the sulphate conjugate, 9-hydroxy-benzo[a]pyrene and the tetrols were also detected.
(12) We have evaluated both electron ionization (EI) and negative-ion chemical ionization (NICI) methods for the analysis of trimethylsilyl derivatives of a series of polycyclic aromatic hydrocarbon (PAH) alcohols including styrene diol, benzo[e]pyrene diol and tetrols, cyclopenta[c,d]pyrene diols, benzo[a]pyrene-4,5-diols, chrysene tetrols, benz[a]anthracene tetrols I and II, and syn- and anti-benzo[a]pyrene tetrols.
(13) The structure of tetrol 4 was confirmed by X-ray diffraction.
(14) The main toxin of both species was identified by mass spectrometric and nuclear magnetic resonance analyses as the 2,2'-bipyridine-3,3',4,4'-tetrol-1,1'-dioxide, which is identical to orellanine.
(15) A major metabolite, present in all three fractions, was tentatively identified as 5 alpha-pregnane-3 beta,7 alpha,17,20 beta-tetrol.
(16) The percentage of 20 beta-epimers of 3 alpha, 17 alpha, 20-trihydroxy-5 beta-pregnan-11-one, 5 beta-pregnane-3 alpha, 11 beta, 17 alpha, 20-tetrol (in the normotensive CAH, PVS and POS) and 5 alpha- or 5 beta-pregnane-3 alpha, 17 alpha, 20, 21-tetrol (in the hypertensive CAH) varied from nil to 76%.
(17) The assay for BaP-globin adducts was based on the release of tetrahydroxy-BaP (BaP-tetrols) from globin by mild acid hydrolysis.
(18) BaP-tetrol levels were measured in rats dosed intraperitoneally with 242, 71 and 24 mumol BaP kg-1 body weight in corn oil.
(19) The structure of clinopodiside A was elucidated by spectroscopic and X-ray diffraction analysis as 3-O-beta-D-glucopyranosyl (1----6)-[beta-D-glucopyranosyl (1----4)]-beta-D-glucopyranosyl-olean-11, 13 (18)-diene-3 beta, 16 beta, 23, 28-tetrol.
(20) BP-tetrols were detected in extracts from 8 placentas: 5 of 7 from smokers and 3 of 9 from nonsmokers.
Tetryl
Definition:
(n.) Butyl; -- so called from the four carbon atoms in the molecule.
Example Sentences:
(1) Tetryl behaved like TNT, except that it was approximately three times more potent.