(n.) A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant.
Example Sentences:
(1) Optimum rates of acetylene reduction in short-term assays occurred at 20% O2 (0.2 atm (1 atm = 101.325 kPa] in the gas phase.
(2) On siratro, CIAT899 induced nodules that were ineffective in acetylene reduction, whereas the EPS-deficient mutants induced effective nodules.
(3) It is suggested that acetylene reduction assays may not be accurately applied to samples containing methane oxidizing bacteria.
(4) Biological nitrogen fixation, as determined by acetylene reduction, occurs in Lake Erie.
(5) Some of the thiophenes and their acetylenic derivatives possess extremely potent phototoxic activities toward membrane-containing viruses.
(6) The efficiencies of the different positional isomers in supporting cell proliferation varied from essentially 0 cells per fmol for the 2-5 and 13-17 isomers to high values when the acetylenic bond was near the center of the chain: e.g.
(7) If the cultures were grown in media with NH4+, NO3-, urea, glutamine or asparagine, hydrogen photoevolution by the cells and acetylene reduction started after the lag-phase and proceeded at a low rate.
(8) Under suitable growth conditions the acetylenic acids are catabolized and partly reused via acetate for de novo synthesis of fatty acids.
(9) 2-Ethynyl-4,5-diphenylthiazoles were synthesized by the palladium catalyst cross-coupling reaction of 2-iodo-4,5-diphenylthiazole with monosubstituted acetylenes.
(10) The conditions which are necessary for the synthesis and function of this system were studied in whole cells by using acetylene reduction as a sensitive assay for the presence of the N(2)-fixing system.
(11) However, in culture under aerobic conditions, large, phase-bright vesicles are formed in HFPCcI3 within 20 h following removal of NH+4 from the culture medium and reach peak numbers within 72 to 96 h. In vivo acetylene reduction activity parallels vesicle formation.
(12) Vesicles permeabilized by freeze-thaw or detergents showed increased rates of acetylene reduction due to increased permeability of dithionite.
(13) After 30 minutes at this new driving force, four timed acetylene samples were again collected.
(14) 3-(1,2,3-Triazol-1-yl)methylcephalosporins have been prepared by the direct cycloaddition of acetylene to 3-azidomethylcephalosporins, which were obtained by nucleophilic substitution of 3-chloromethylcephalosporins with sodium azide in N,N-dimethylformamide.
(15) Biological dinitrogen fixation in mangrove communities of the Tampa Bay region of South Florida was investigated using the acetylene reduction technique.
(16) Nitrate reductase (nar) A, B and E mutants of Escherichia coli with plasmids carrying Klebsiella pneumoniae nitrogen fixation (nif) genes reduced acetylene independently of added molybdate, but nar D mutants showed pleiotropic dependence on the concentration of added molybdate for expression of both nar and nif.
(17) Two important side reactions of this procedure are known: the formation of the isomeric beta-ethynyl derivative and the formation of a dimeric product with acetylene bridge.
(18) Acetylene-reducing activity of purified nitrogenase from Klebsiella pneumoniae was studied over a range of ATP and Mg(2+) concentrations at 15 degrees C, pH7.8.
(19) The reconstituted acid mixture is injected into the graphite tube atomizer for analysis of Cu and Cd and aspirated into the air--acetylene flame for measurement of Zn.
(20) The 19-acetylenic testosterone, a confirmed metabolite from primate studies, was 25% as efficient as MDL 18,962 for aromatase inactivation, while 6 beta-hydroxy- and 6-oxo analogs were 11% and 5%, respectively as efficient as their parent compound.
Peculiar
Definition:
(a.) One's own; belonging solely or especially to an individual; not possessed by others; of private, personal, or characteristic possession and use; not owned in common or in participation.
(a.) Unusual; singular; rare; strange; as, the sky had a peculiarappearance.
(n.) That which is peculiar; a sole or exclusive property; a prerogative; a characteristic.
(n.) A particular parish or church which is exempt from the jurisdiction of the ordinary.
Example Sentences:
(1) We considered the days of the disease and the persistence of symptoms since the admission as peculiar parameters between the two groups.
(2) Structural peculiarities in tubulin polymorphism are considered.
(3) Angiopathic and traumatic influences conditioned by metabolism, apart from local peculiarities are taken into consideration.
(4) Cancer of the mouth, pharynx and esophagus has decreased in all Japanese migrants, but the decrease is much greater among Okinawan migrants, suggesting they have escaped exposure to risk factors peculiar to the Okinawan environment.
(5) Electron microscopy revealed the presence of a hitherto unreported peculiar "pilovacuolar" inclusion in numerous mitochondria, composed of an electron dense pile or rod within a vacuole, while globular or crystalline inclusions were absent.
(6) A new theory for the peculiar site selection of cholesteatomas of the external auditory canal is postulated.
(7) Some fundamentals of the causes of diagnostic errors depending upon anatomophysiological and topographo-anatomical peculiarities of woman's organism are given.
(8) The peculiar aspects of uncommon causes of IVH are discussed on the basis of a review of the literature.
(9) The qualification for carrying on the isonicotinic acid hydrazide monotherapy in the tuberculosis cutis luposa and verrucosa is proved on the basis of bacteriological, pathologo-anatomical and clinical peculiarities of these forms of tuberculosis of the skin.
(10) Acini in the parotid gland of the North American mink (Mustela vision) are composed of seromucous cells that contain secretory granules of peculiar morphology.
(11) In 20.2% of the cases with carcinoma the tumor cells showed peculiar intracytoplasmic inclusions, whereas in only 0.43% of the biopsies of the mamma without carcinoma such inclusions were to be found.
(12) A peculiar emphasis is given to the microarchitecture and functional significance of longitudinal muscle columns as a prevalent structural component of branch pads.
(13) The peculiar configuration of the pneumocephalus is attributed to the partial obliteration of the subarachnoid space due to the increased intracranial pressure.
(14) So far, the UK election has thrown up a carnival of peculiar results | Lewis Baston Read more Scotland, of course, is a different story: but David Cameron’s antagonistic response to the 2014 referendum clearly swung a lot of anti-Tory voters towards the SNP.
(15) The peculiarities of the growth and extracellular accumulation of free keto and amino cids by a barotolerant culture (strain 0798) in culturing on Ran's glucose-mineral medium conditions of 1, 200, 300, and 500 atm were investigated.
(16) Diffuse widening of the subarchnoidal space, diffuse cerebral changes, interhemispheric assymetry of the venous and arterial phases of cerebral circulation: the most peculiar symptoms of the CNS affection in SLE according to CT and EEG and radionuclide studies of cerebral hemodynamics.
(17) One peculiar case of giant ameloblastoma of the mandible is reported in this paper.
(18) Considering the tumour's late occurrence the histological peculiarities of the place of origin as one of the factors of possible histogenesis is stressed.
(19) Ultimately, the judgments combine to make a particularly peculiar melange: among the plaintiffs there is a mix of economic pessimism and insecure nationalism with a shot of nostalgia for the Deutschmark.
(20) They also include difficulties peculiar to the condition of mild mental retardation, including the choice of method of classification whether by IQ testing or administratively; the heterogeneous nature of the individuals so characterised; and the confounding effects of social and biological factors and the changes in the implications for the affected individual of the condition, depending on age, sex and environment.