(a.) In the form, or of the nature, of gas, or of an aeriform fluid.
(a.) Lacking substance or solidity; tenuous.
Example Sentences:
(1) The use of gaseous insecticides in the chemical control of T. infestans is discussed.
(2) The DCM sampler is expected to contribute to public health impact assessments by facilitating detailed determinations of the identities, compositions, concentrations, sources, formation mechanisms, and biological activity of environmental toxicants in gaseous atmospheres.
(3) The causes were: restricted respiratory movements due to pain, compression of the lungs or pathological changes in the injured lung, and they affected the normal gaseous exchange in a variety of ways.
(4) Blood gaseous composition, mechanisms controlling hemoglobin affinity to oxygen and hemoglobin effects of a single captopril dose were assessed in 124 patients with chronic heart failure (CHF).
(5) In case of B. cinerea, the effect of the volatile and gaseous exudates of the germinating seeds of all plants used on the fungal spore germination differed according to both the sugar and nitrogen source absorbed.
(6) The physiological measurements were arterial oxygen saturation, heart rate, ventilatory frequency, and gaseous analysis in the mask.
(7) This method offers the possibility of a new approach to study of the mode of action of gaseous aerocontaminants on the respiratory tract and particularly upon phagocytic defences.
(8) This research deals with the gaseous and biochemical changes in the cerebrospinal fluid and their effects on the cerebral blood flow and metabolic rates in the acute stage of brain injury.
(9) About 136 gaseous compounds are analysed in animal house air of which 22 are quantified, only.
(10) These observations indicate that, despite the great variation in the fecal flora among individual mice, it is possible to discover the effects induced by altered gaseous environments.
(11) Different variants of the method are estimated and the optimal conditions of cultivation are described (nutrient medium, gaseous phase, depth of explants' immersion, rate of medium flow, etc).
(12) Suspensions of Pseudomonas aeruginosa and Bacillus cereus were continuously sparged with nitrogen to remove gaseous products of nitrate reduction.
(13) These include: (1) atmospheric HCl will most commonly exist in the gaseous form; (2) long-range transport of HCl is probably of limited importance; (3) ambient HCI levels are in the low parts per billion range; (4) irritation of the upper airways appears to be the most sensitive indicator of exposure; (5) such effects are likely to occur only at exposure levels much greater than those measured in ambient air; and (6) future health research should focus on occupationally exposed populations and potentially sensitive subgroups, e.g., asthmatics.
(14) It was established that mildronate produced a positive effect on the hemodynamics and gaseous composition of the blood.
(15) Tests based on the analysis of the gaseous components of expired air have been developed to study intestinal absorption and intermediary metabolism of various nutrients.
(16) The oral strains were able to utilize gaseous hydrogen and to grow in a mineral medium with either nitrate of fumarate as hydrogen acceptor.
(17) Significant variations (p less than .005) were observed for the particleboard mass and gaseous formaldehyde collected between sample runs.
(18) Cultures of the sublines were also maintained with either a gaseous phase of 0-1% oxygen or atmospheric (18%) oxygen.
(19) These observations suggested that animals effectively inhaled both gaseous and particulate phase constituents of cigarette smoke.
(20) The concentration of gaseous sulfur showed always a larger variation coefficient than that of particulate sulfur.
Propene
Definition:
(n.) Same as Propylene.
Example Sentences:
(1) At ambient temperature the benzylidene hydrazide of 3-(3,4-dimethoxyphenyl)propenic acid (VII) and a small amount of compound VIII were isolated.
(2) The mutagenic activities of mixtures of nitrogen dioxide and 1,3-butadiene or propene were investigated after uv-irradiation in a small, laboratory-bench scale flow-through gas exposure system.
(3) Feeding 1-amino-3-imino N,N' propene diacetate (AIPD) produced 2 metabolic by products with active aldehyde groups 1-amino propenal acetic acid (APA) and malonyldialdehyde (MDA) that transiently block the lysine epsilon-amino groups of all proteins and lipoproteins in vivo.
(4) Acute toxicity is believed to involve metabolism of allylamine to highly reactive acrolein (2-propenal).
(5) Vinylogous hydroxamic acids (3-(N-hydroxy-N-alkylamino)-2-propen-1-ones, VHA) were prepared as antiinflammatory agents.
(6) (E)- and (Z)-1,2,3-triphenyl-2-propen-1-ones and some of their phenolic and alkoxy analogues, substituted at the para position in one or more of the aromatic rings, were synthesized and assigned geometry on the basis of their spectroscopic data.
(7) All the data taken together suggested that the RPS's were the stereoisomer of 3-(2-ethyl-5-hydroxy-3-oxo) cyclopentanyl-2-propenal.
(8) 1-(2,6-Dihydroxy-4-methoxyphenyl)-3-(4-methoxyphenyl)-2-propen-1-o ne, C17H16O5, Mr = 300.31, orthorhombic, Pbca, a = 27.903 (3), b = 13.958 (2), c = 7.662 (1) A, V = 2984 (1) A3, Z = 8, D chi = 1.337 Mg m-3, lambda(Cu K alpha) = 1.5418 A, mu = 0.729 mm-1, F(000) = 1264, T = 295 K, R = 0.040 for 1702 observed reflections.
(9) The 5'-monophosphate oligonucleotide ends produced from thymine propenal formation have been converted to inorganic phosphate by the action of alkaline phosphatase, and the phosphate has been analyzed for 18O content by 31P NMR spectroscopy.
(10) 1-(Fluoren-2-yl)-2-propen-1-one (vinyl fluorenyl ketone, VFK) was shown to be a potent and irreversible inactivator of NAT II activities.
(11) These data suggest a mechanism of inactivation which involves the transamination of the nascent product to the pyruvoyl group, followed by the elimination of methylthioadenosine and the generation of a 2-propenal equivalent which could undergo a Michael addition to the enzyme.
(12) In the reaction of 3-(3,4-dimethoxyphenyl)propenic acid chloride with benzylidene hydrazide (VII) at 70-80 degrees C, compound VIII was obtained (Scheme 1).
(13) Treatment of calf thymus deoxyribonucleic acid (DNA) with bleomycin-Fe(II) at 0 degree C for 5 min resulted in the formation of 8-hydroxyguanine (8-OH-Gua) residues in DNA in a dose dependent manner, in addition to the formation of base propenal, a DNA-degradation product.
(14) It is a useful intermediate in the preparation of a new class of chromophoric spin label substrates for enzyme studies, as shown by the synthesis of O-3-(2,2,5,5-tetramethylpyrroline-1-oxyl)-propen-2-oyl-L-beta-phenyllactic acid, a specific ester substrate of bovine pancreatic carboxypeptidase A (peptidyl-L-amino acid hydrolase; EC 3.4.12.2).
(15) We have identified a new radiation product (thymin-1'-yl)-propenal as the TBA-reactive product of gamma-irradiation of thymidine.
(16) These phosphate-containing compounds increase both the release of free nucleic base and that of base propenals which are DNA cleavage products, probably by enhancing the efficiency with which Fe(II) is recruited into the drug.
(17) From 3-(3,4-dimethoxyphenyl)propenic acid chloride and substituted amines and hydrazides, the appropriate amides and hydrazides (Table 1) were synthesized at 60-80 degrees C in the medium of benzene or toluene.
(18) Approximately 0.25 ppm butadiene, compared to 100 ppm propene, was needed to give a significant mutagenic effect with 0.25 ppm NO2 after 6 hr exposure.
(19) Male CBA mice were exposed to propene, unlabelled or 14C-labelled, by inhalation, or to 14C-labelled propylene oxide by intraperitoneal injection.
(20) An approximate 1:4 ratio was observed between butadiene and propene which both originate predominantly from vehicle exhaust.