(n.) An elementary substance, not metallic in its nature, which is present in all organic compounds. Atomic weight 11.97. Symbol C. it is combustible, and forms the base of lampblack and charcoal, and enters largely into mineral coals. In its pure crystallized state it constitutes the diamond, the hardest of known substances, occuring in monometric crystals like the octahedron, etc. Another modification is graphite, or blacklead, and in this it is soft, and occurs in hexagonal prisms or tables. When united with oxygen it forms carbon dioxide, commonly called carbonic acid, or carbonic oxide, according to the proportions of the oxygen; when united with hydrogen, it forms various compounds called hydrocarbons. Compare Diamond, and Graphite.
Example Sentences:
(1) Carbon dioxide (CO2) levels, volumes, and temperatures of expired gas were measured from the tracheal and esophageal tubes.
(2) Biochemical, immunocytochemical and histochemical methods were used to study the effect of chronic acetazolamide treatment on carbonic anhydrase (CA) isoenzymes in the rat kidney.
(3) To quantify the size of the lesion in mice, the area of the infarct on the brain surface was assessed planimetrically 48 h after MCA occlusion by transcardial perfusion of carbon black.
(4) Ethanol and L-ethionine induce acute steatosis without necrosis, whereas azaserine, carbon tetrachloride, and D-galactosamine are known to produce steatosis with varying degrees of hepatic necrosis.
(5) Heart rate (HR), pulmonary ventilation (V), oxygen consumption (VO2), carbon dioxide production (VCO2), and respiratory quotient (RQ) were measured.
(6) Given Australia’s number one position as the worst carbon emitter per capita among major western nations it seems hardly surprising that islanders from Fiji, Samoa, Vanuatu and other small island developing states have been turning to Australia with growing exasperation demanding the country demonstrate an appropriate response and responsibility.
(7) 4) Parents imagined that fruit drinks, carbonated beverages and beverages with lactic acid promoted tooth decay.
(8) This capacity is expressed during incubation of the bacteria with the substrate and needs a source of carbon and other energy metabolites.
(9) The disappearance of the herbicide, Avadex (40% diallate), from five agricultural soils (differing in either pH, carbon content, or nitrogen content), incubated under sterile and non-sterile conditions, was followed for a period of 20 weeks.
(10) Environment groups Environment groups that have strongly backed low-carbon power have barely wavered in their opposition to nuclear in the last decade, although their arguments now are now much about the cost than the danger it might pose.
(11) Cultured cells from fourth to ninth passage showed positive labelling for S 100 protein, carbonic anydrase (CAA), glutamine synthetase (GS), alpha cristallin (alpha C) and polyclonal glial fibrillary acidic protein (GFAP) antibody, but were negative for both monoclonal GFAP antibody and also for Muller cells in the retina.
(12) They argue that the US, the world's largest producer of greenhouse gases per capita (China recently surpassed us in sheer volume), needs to lead the fight to limit carbon emissions, rather continuing to block global treaties as it has done in the past.
(13) Thin layers of carbon (20 microns) and vacuoles (30 microns) suggested a large temperature gradient along the tissue ablation front.
(14) Aryl hydrocarbon hydroxylase (AHH) inducibility, carbon monoxide in expired air (CO), serum gammaglutamyl-transferase (GGT), and total cholesterol were compared in equal-sized, age-matched samples of healthy middle-aged males born in 1921, 1934-1936, and 1946 attending the ongoing preventive medical population program in Malmö.
(15) The disappearance of ribosomes in Escherichia coli cells starved for a carbon source was studied.
(16) It was shown that the levels of ATP and ADP in the mycelium depended on the carbon source: the maximum and minimum ATP concentrations were found on the glucose and acetate media respectively, the maximum and minimum ADP concentrations showed inverse dependence.
(17) The mechanism by which such high levels were attained was primrily a combination of arterial hypoxia and a high carbon monoxide yield from tobacco.
(18) Nick Robins, head of the Climate Change Centre at HSBC, said: "If you think about low-carbon energy only in terms of carbon, then things look tough [in terms of not using coal].
(19) Immediately prior to and at maximal workloads, carbon monoxide shifted into extravascular spaces and returned to the vascular space within five minutes after exercise stopped.
(20) The purity and configuration of each isomer of the free acid and N-chloroacetylated derivative were ascertained by: (a) paper chromatography in five solvent systems, (b) elemental analysis, (c) Van Slyke nitrous acid determination of alpha-carbonyl carbon, and (d) Van Slyke ninhydrin determination of alpha-carbonyl carbon, and (e) optical rotation.
Unsaturated
Definition:
(a.) Capable of absorbing or dissolving to a greater degree; as, an unsaturated solution.
(a.) Capable of taking up, or of uniting with, certain other elements or compounds, without the elimination of any side product; thus, aldehyde, ethylene, and ammonia are unsaturated.
Example Sentences:
(1) An unsaturated fatty acid auxotroph of Escherichia coli was grown with a series of cis-octadecenoate isomers in which the location of the double bond varied from positions 3 to 17.
(2) Substances with a leaving group at the C-3 position form unsaturated conjugated cyclic adducts and are mutagenic only in the His D3052 frameshift strains with an intact excision repair system (no urvA mutation).
(3) In general, optimal DAGAT activity in vitro was observed when long-chain unsaturated acyl-CoAs and diacylglycerols (DAGs) containing long acyl chains were used as substrates for in vitro TAG synthesis (although 1,2-didecanoin was also very effective).
(4) Saturated acyl residues predominated in lysolecithin and unsaturated ones in acids released by hydrolysis of egg lecithin.
(5) The content of unsaturated fatty acids in walleye pollock PRM is 1.4 times greater than in frog PRM.
(6) Taken together with other physical studies on the effect of vitamin E on (unsaturated) phospholipids, these results indicate that vitamin E could influence the physical properties of membrane phospholipids in addition to its known antioxidant role.
(7) Partially purified fatty acid synthetase produced saturated and unsaturated fatty acids with chain lengths of C10 to C18.
(8) The phosphatidylcholine and phosphatidylethanolamine had distinctive fatty acid distributions for position sn-2 of the triacylglycerol had a predominance of unsaturated fatty acids of which 18:1 (69.9%) was the major component.
(9) Alternatively, the data presented herein strongly suggest that diets containing conventional quantities of fat, in which saturated fat is replaced by unsaturated fat and dietary cholesterol reduced, would result in the desired reductions to total and low-density lipoprotein cholesterol concentrations without the adverse effects of increased postprandial glucose and insulin concentrations, increased fasting and postprandial total and very-low-density lipoprotein triglyceride concentrations, and decreased fasting high-density lipoprotein cholesterol concentrations.
(10) While undoubtedly a good understanding of soil microbiology in terms of pedology exists, little is presently known about unsaturated subsoils, and aquifers.
(11) In the intact neutrophil, this enzyme can be activated by increases in cytosolic calcium, protein kinase C, and unsaturated fatty acids such as arachidonic acid, all of which are produced on stimulation by chemotactic peptides like N-formyl-methionyl-leucyl-phenylalanine.
(12) In 8 of 11 patients no changes occurred in excretion of bile acids during the period on unsaturated fat when plasma cholesterol was declining.
(13) linoleic and gamma-linolenic acid also inhibited its secretion, whereas saturated fatty acid and mono-unsaturated fatty acids, such as oleic acid, were without effect.
(14) Patients under caloric restriction showed a reduction in their total triglyceride content, a reduction in their content of unsaturated fatty acyl groups, and a relative increase in phospholipid content.
(15) Protons and divalent cations show synergistic effects on the destabilization of liposomes composed of unsaturated phosphatidylethanolamine and oleic acid (Düzgünes et al., Biochemistry (1985) 24, 3091).
(16) 3H-acetyl CoA is more intensively used in the synthesis of unsaturated fatty acids than 14C-acetyl CoA synthesized from acetate.
(17) Amides containing an epoxy group exhibit a broad spectrum of antimicrobial activity which is further enhanced by unsaturation.
(18) The same enzyme biosynthesises saturated and mono-unsaturated very long chain fatty acids.
(19) In the infected chicks also the transferrin saturation was significantly lower and the unsaturated ironbinding capacity higher, on days 4, 6, and 8 after infection.
(20) Alcohol dehydrogenase purified by CM-cellulose chromatography from the sera of patients with hepatoma had a higher affinity for butanol long chain saturated and unsaturated alcohols than the purified enzyme from healthy controls.