(n.) Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.
Example Sentences:
(1) Cyclic terpenes were selected from the chemical classes of hydrocarbons (e.g., alpha-pinene), alcohols (e.g., alpha-terpineol), ketones (e.g., carvone), and oxides (e.g., 1.8-cineole, ascaridole).
(2) From the unsaponifiable fraction (63 g) of linseed oil (25 kg), two terpenic alcohols were isolated by alumina column, thin-layer, and gas-liquid chromatography.
(3) During growth on oat grain the production of 8-carbon alcohols and 3-methyl-1-butanol was higher and the production of terpenes was lower than during growth on agar substrates.
(4) Derivatives of camphor and terpenes have been identified in this particular river.
(5) The organisms were isolated on, and grew rapidly in, mineral salts medium containing the appropriate terpene substrates as sole carbon sources.
(6) These observations are compared with the results obtained with terpenic molecules which interact with mitochondrial respiration.
(7) The terpenes with hydrogen-bonding ability, however, only enhanced propranolol flux (at a level comparable to n-nonanol).
(8) The terpene PAF receptor antagonist BN52021 inhibited the action of PAF on [Ca2+]i. Voltage-dependent Ca2+ channel blocker, verapamil (200 microM), antagonized the action of PAF on [Ca2+]i as did chelation of extracellular Ca2+.
(9) Bakuchiol [17], a known prenylated phenolic terpene, was also isolated; its activity was not due to toxicity.
(10) The studies on isolated mitochondria showed a series of effects, starting with the disappearance of the respiratory control and deenergization of the organelles and followed by an inhibition of respiration at higher concentrations of the terpene.
(11) To improve oral litholysis: 1) UDCA was combined with the amino acid taurine, 2) CDCA and UDCA were administered in a single bedtime dose, 3) they were combined, each bile acid in half dosage, and 4) they were mixed with terpenes.
(12) The terpenes prolonged nucleation time from 2.8 to 5.8 days (one capsule; P less than 0.05) and to 9.5 days (two capsules; P less than 0.001), respectively; but nucleation did not occur in seven controls.
(13) Samples collected from 50 mL of ambient air at 87 K (liquid argon) are injected without use of a valve into a silica capillary column which is then temperature programmed from -30 degrees C to 180 degrees C. Hydrocarbons (4 to 10 carbons) as well as carbonyl compounds, chlorinated compounds and terpenes can be identified and quantified.
(14) These results support previous findings suggesting that hydroxylation of the terpene portion of the delta 9-THC molecule significantly reduces intraocular pressure lowering activity.
(15) The problems connected with the measurement of hydrocarbons outside urban areas are considerable: The atmospheric mixing ratios of most of the hydrocarbons are very low--from a few ppb down to some ppt; the mixture of hydrocarbons is extremely complex, ranging from light n-alkanes to alkyl benzenes and terpenes; for measurements in remote areas the logistic conditions often restrict the instrumentation which can be used for sample collection or in situ measurements (such as lack of electric power supply, weight restrictions etc.).
(16) Inhibitors included sulfhydryl reactive compounds, terpene epoxides, and pinane derivatives with substituent groups at carbon 3.
(17) However, rat liver microsomal acyl-CoA:retinol acyltransferase activity was inhibited by the terpene ester.
(18) The content of n-isoalkans, isoprenoids, monocycloparaffins, bi-and tricyclic naphthenes, steranes and terpenes, olifines, squalene and other polyenes in sunflower, cotton, soya oils and oilcakes was measured.
(19) The genotoxicity of the terpene beta-myrcene was evaluated in mammalian cells in vitro.
(20) Both are terpenes, which are derived by assembly of isoprene units.
Turpentine
Definition:
(n.) A semifluid or fluid oleoresin, primarily the exudation of the terebinth, or turpentine, tree (Pistacia Terebinthus), a native of the Mediterranean region. It is also obtained from many coniferous trees, especially species of pine, larch, and fir.
Example Sentences:
(1) The left eye was used as control and injected with a volume of saline equal to the volume of turpentine in the right eye.
(2) A fraction prepared from normal human plasma inhibits the migration of polymorphonuclear and mononuclear leucocytes into inflammatory exudates produced by the intrapleural injection of carrageeman or turpentine by the subcutaneous implantation of polyvinyl sponges in the rat.
(3) After turpentine injection there was an early fall in the plasma albumin and total protein concentrations in both normal and protein-deficient rats.
(4) Local swelling could be markedly inhibited in the turpentine-oil induced inflammatory reaction of the rabbit.
(5) To determine the cell of origin of C-reactive protein (CRP) and to cast light on the mechanisms leading to the acute phase response, we used an immunoenzymatic technique to visualize this protein in livers from rabbits at intervals after intramuscular injection of turpentine.
(6) The inhibitory effect of turpentine-induced inflammation was somewhat lower than that of SKF 525A.
(7) In contrast to alpha AGP mRNA, transport of albumin mRNA was decreased 3-4X in turpentine-treated preparations.
(8) Turpentine treatment significantly reduced the in-vitro breakdown of the three drugs; aminopyrine N-demethylase activity and cytochrome P450 content were also decreased.
(9) Poly(A)+ RNA from turpentine-injected rat liver was converted to cDNA by the method of Okayama-Berg, and about 50,000 transformants were obtained.
(10) Data from our present studies demonstrate the capability of a 105,000 X g pellet from rat normal bone marrow, turpentine-induced hyperplastic bone marrow, and chloroma tumor to transform precursor arachidonic acid into prostaglandins.
(11) Hepatocytes were isolated from adult rats at various times after subcutaneous injection of turpentine (1 ml).
(12) The concentration of hepatic cytochrome P-450 was reduced in turpentine-treated rabbits, whereas the cytochrome b5 concentration remained the same in both groups.
(13) There was an inverse statistical correlation (r = -0.63 to r = -0.84) between the functional concentration of a proteinase inhibitor protein determined with the chromogenic substrate assay for human alpha 2-macroglobulin and the catalytic concentrations of various cell leakage enzymes in serum from liver-injured rats with turpentine-generated inflammation.
(14) Venice turpentine was a useful additional screening substance.
(15) Patch testing with the ICDRG standard test battery gave positive reactions to colophony, balsam of Peru, and turpentine peroxides.
(16) The most frequent chemicals were turpentine, petrol and lamp oil.
(17) Slot-blot hybridization of equal portions of RNA revealed that 12 h after injection of turpentine to induce inflammation, ferritin mRNA was concentrated on the ER-bound polyribosomes, while it was concentrated on the free polyribosomes 2 h after injection of ferric ammonium citrate.
(18) The effects of glucocorticoid treatment on the induction of hepatic metallothionein (MT) during inflammation initiated by turpentine oil (TUR) or endotoxin (LPS) were studied in mice.
(19) In both dextran groups, neutrophil counts rose again between 24 and 72 hr, but in the turpentine group the fall persisted until 96 hr before counts reached a second peak at 14 days.
(20) After turpentine injection, plasma fibrinogen levels, as expected, rose to more than double the baseline values within 48 hours and then declined to the upper limit of the normal range in 6 days.