(a.) Not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adulterated; as, impure water or air; impure drugs, food, etc.
(a.) Defiled by sin or guilt; unholy; unhallowed; -- said of persons or things.
(a.) Unchaste; lewd; unclean; obscene; as, impure language or ideas.
(a.) Not purified according to the ceremonial law of Moses; unclean.
(a.) Not accurate; not idiomatic; as, impure Latin; an impure style.
(v. t.) To defile; to pollute.
Example Sentences:
(1) Two other impurities are pyrene derivatives but their acyl chains probably are not decanoic acid.
(2) No impurities in the technical grade ether influenced the responses.
(3) The UV and IR absorption spectra of compounds present in the eluate were compared with those of model compounds that were assumed to exist in the gel as impurities after the polymerization (monomers and oligomers of hydroxyethyl methacrylate, decomposition products of initiators).
(4) Chloramphenicol, dinitrophenol, and impurities present in some brands of agar all appear to inhibit the growth-medium-dependent branch of excision-repair.
(5) The combined results describe the depth of segregation of DMS blocks in Avcothane, the presence of DMS within the topmost 20 A in Biomer, and similar impurities in the model polymers.
(6) An impure sample of PLC inhibited sperm penetration, while a more purified preparation did not.
(7) A liquid chromatographic (LC) method was adapted for the determination of epinephrine and related impurities in intravenous and cardiac injections; ultraviolet (UV) and electrochemical detectors (EC) were used in series.
(8) The determination of potency or shelf life, impurity limit testing, and study of reaction mechanisms are considered as different aspects of drug stability.
(9) Isolated cytochrome c oxidase was fractionated by native-gel electrophoresis in Triton X-100, and a preparation of enzyme almost completely free of the usual impurities was recovered.
(10) Although these are worst case calculations, a consistent approach should be reconsidered to limit the additional effective dose equivalent from impurities to e.g.
(11) As little as 50 nmol of a protein may be quantified and an impurity peak of molecular weight ca.
(12) Not all impurities were found in every lot of drug investigated, and none of the impurities exceeded a concentration of 1% of the meperidine present.
(13) Skin impurities and fatty hair associated with acne were side effects in 22.5% of 378 patients during the first evaluation and in 10.8% of 369 patients at the second evaluation.
(14) The organic solvent soluble impurities exhibited strong mutagenic activity for TA98 and slight activity for TA100.
(15) Following this order the absorbents can be used for purification of human albumin from non-specific impurities taking into account stronger adsorption of albumin or impurities.
(16) Trace amounts of an impurity commonly produced in the synthesis of 1,2-distearoyl-3-sn-phosphatidylcholine, 1,3-distearoyl-2-sn-phosphatidylcholine, are found to dramatically reduce the rate of loss of small vesicles at 21 degrees C.
(17) It is shown on the basis of calculations of energy sublevels of the hyperfine structure that the effect of the geomagnetic field upon the impurity atoms in the volume of living cells should be considered in relation to the value of geomagnetic field induction pulses delta B.
(18) Contamination of cells by impurity atoms that may leach from electrodes was measured by atomic-absorption spectrophotometry and found to be negligible.
(19) Results presented here indicate that N-nitroso compound impurities are absent from the majority of the products tested.
(20) Eight of the proteins (L9, L11, L13, L21, L22, L35', L37 and L39) had no detectable contamination; the impurities in the others were no greater than 9%.
Pollutant
Definition:
Example Sentences:
(1) The biggest single source of air pollution is coal-fired power stations and China, with its large population and heavy reliance on coal power, provides $2.3tn of the annual subsidies.
(2) Several studies have found that pollution and climate change disproportionately affect the poor , which means boosting clean energy generation and cutting pollution could also simultaneously reduce global inequality .
(3) The effect of airborne pollution, especially nickel, from Kola has been studied in 10,612 persons who participated in a cardiovascular screening survey in Finnmark in 1974-75.
(4) The mayor of London had said in a Twitter exchange in July that it was a “ludicrous urban myth” that Britain’s premier shopping street was one of the world’s most polluted thoroughfares, saying that the capital’s air quality was “better than Paris and other European cities”.
(5) N-heterocyclic aromatics are environmentally important carcinogenic pollutants produced by incomplete combustion of organic material.
(6) Among environmental pollutants, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD; dioxin) is one of the most potent tumor promoters and teratogens known.
(7) A grassed roof, solar panels to provide hot water, a small lake to catch rainwater which is then recycled, timber cladding for insulation ... even the pitch and floodlights are "deliberately positioned below the level of the surrounding terrain in order to reduce noise and light pollution for the neighbouring population".
(8) Mineral fibers represent the greatest cause--after cigarette smoke--of respiratory cancer due to air pollutants.
(9) Recognition, evaluation and control of hazards were carried out in a typical case where chromium was the major pollutant.
(10) The UK, France and Germany have been accused of hypocrisy for lobbying behind the scenes to keep outmoded car tests for carbon emissions, but later publicly calling for a European investigation into Volkswagen’s rigging of car air pollution tests .
(11) Under the auspices of the US-USSR agreement for cooperative research in environmental health, Soviet methods for setting and enforcing standards for environmental pollutants were observed.
(12) Results of the determinations indicated that protective leather gloves contained considerable content of chromium, and chromium-free machine oils and lubricants were polluted with chromium's minute quantities as the oils and lubrications were being used.
(13) Study of the environmental pollution (ambient air, drinking water, food and fodder) in southern Ukraine industrial region and study of congenital developmental defects were carried out.
(14) The metabolism of the environmental pollutant and suspected human carcinogen, cyclopenta[cd]pyrene (CPP), was investigated.
(15) A variety of ecological processes are affected and altered by air pollution.
(16) However, indoor air pollution is estimated to have caused or contributed to 99,000 deaths across Europe in 2012, the report states.
(17) Since some genotoxic metals are diffused in the environment and are often sequestered as insoluble precipitates in water sediments and sludges, the introduction of NTA is likely to increase the risk of environmental pollution because of its ability to solubilize and make those metals reactive.
(18) Because surface water pollution appears to be important it is proposed that headwalls and drainage aprons be built around unprotected sources.
(19) Several reports have suggested that staphylococci, and especially Staphylococcus aureus, are useful indicators of pollution of recreational waters.
(20) Reasonable short-term objectives include the reduction of tobacco use (and alcohol abuse), the control of exposure to carcinogens in the workplace, as well as the reduction of air pollution in the general environment.