(n.) The act, process, or result of combining with nitrogen or some of its compounds.
(n.) The act or process of oxidizing nitrogen or its compounds so as to form nitrous or nitric acid.
(n.) A process of oxidation, in which nitrogenous vegetable and animal matter in the presence of air, moisture, and some basic substances, as lime or alkali carbonate, is converted into nitrates.
Example Sentences:
(1) A comparison of the effects observed for three pesticides, dieldrin, chlorpyrifos and Vorlex, in three soil types with those produced by an antibiotic, a fungicide, a nitrification inhibitor and steam pasteurization of the soil clearly demonstrate the effectiveness of the simple technique.
(2) An experiment on the effects of pesticides on nitrification in the percolator is described.
(3) The sufficient concentration of the active ingredients to inhibit the nitrification are lower than the fungicidal concentrations.
(4) However, nitrification is a cause of significant errors in measuring BOD, particularly when a large population of nitrifying organisms are existing in water such as effluents from biological treatment plants.
(5) Simultaneous processes of nitrification and denitrification were observed in optimal aerated manure similar to activated sludge processes.
(6) The effect of size of structural aggregates on the intensity of nitrification and nitrogenase (nitrogen: acetylene oxidoreductase) activity was investigated in three soils.
(7) Changes in microbial population determined by the dilution plate method, in nitrification by the soil perfusion technique, and in oxygen consumption using a differential respirometer are the only measurements required.
(8) The biotest presented permits the investigation of sewage as for the presence of nitrification-inhibiting substances.
(9) On the contrary, smaller aggregates (0.5-2 mm) exhibited more intensive nitrification.
(10) When nitrate was used, the nitrification was not delayed.
(11) The effects of two herbicides, Sencor and Goltix, on nitrification in two soils were studied using a mixed culture of nitrifying bacteria.
(12) Heterotrophic nitrification by another organism, a strain of "Pseudomonas denitrificans" has also been shown to be inhibited by thiosulphate in short term experiments and in the chemostat.
(13) The combination of increased concentrations of oxidized nitrogen with decreased total chlorine residuals can be used as a rapid indicator of bacterial nitrification.
(14) Bacterial toxicity tests are based on bioluminescence, motility, growth, viability, ATP, oxygen uptake, nitrification, or heat production.
(15) The biotest was successfully applied in order to find out the inhibition of nitrification in a communal purification plant.
(16) Inhibitors thought to be specific to ammonia oxidizers have been used in environmental studies of nitrification.
(17) Ammonification, nitrification, urea transformation, and decomposition of cellulose are enhanced by the increased occurrence of bacteria and actinomycetes.
(18) Sencor (10 ppm, 50 ppm, and 100 ppm) has no inhibitory influence on nitrification.
(19) The overall nitrification activity was, however, essentially unaffected by the oxygen concentration.
(20) Nitrification usually returned to a relative equilibrium in several days after the herbicide application.
Nitrify
Definition:
(v. t.) To combine or impregnate with nitrogen; to convert, by oxidation, into nitrous or nitric acid; to subject to, or produce by, nitrification.
Example Sentences:
(1) The influence of salt mixtures consisting of Ca(H2PO4)2, trace elements, CaSO4, CaCO3, Na2CO3, NaCl and K2SO4 in different combinations on the nitrifying power, evolution of carbon dioxide and the total number of bacteria was studied in arid soils (sandy and alluvial) and semi-humid ones (chernozem and rendzina).
(2) However, nitrification is a cause of significant errors in measuring BOD, particularly when a large population of nitrifying organisms are existing in water such as effluents from biological treatment plants.
(3) The abundance of nitrifying bacteria, determined by most-probable-number procedures, within habitats of the Passaic River was as follows: rooted aquatic plants greater than algae approximately equal to rocks greater than sediments greater than greater than water.
(4) Extracts of the hyphae of a nitrifying strain of Aspergillus flavus formed nitrite and nitrate from 3-nitropropionate.
(5) The effects of two herbicides, Sencor and Goltix, on nitrification in two soils were studied using a mixed culture of nitrifying bacteria.
(6) Concentrated pine bark tannins, similar in origin to those in effluents at the well-nitrifying chipmill site, were tested for toxicity to pure cultures of nitrifying bacteria.
(7) The counts of nitrifying bacteria also increased whereas those of desulfurizers remained non-affected.
(8) Three bacteria, two of which were previously noted as active heterotrophic nitrifiers, were examined for their ability to grow and nitrify with the siderophore deferrioxamine B as the carbon source.
(9) Pseudomonas aureofaciens displayed limited growth and nitrification while a heterotrophic nitrifying Alcaligenes sp.
(10) This is the first description of thermophilic nitrifying bacteria belonging to the genus Nitrosomonas.
(11) Enrichment cultures of nitrifying microorganisms were obtained from all sites using NH4+ as a source of energy, but enrichments for nitrite oxidizers were unsuccessful.
(12) Nitrifying bacteria were detected in 64% of samples collected from five chloraminated water supplies in South Australia and in 20.7% of samples that contained more than 5.0 mg of monochloramine per liter.
(13) Various heterotrophic nitrifiers have been tested and found to also be aerobic denitrifiers.
(14) Nitrite and hydroxylamine reductases were found in both nitrifying bacteria, and optimum activity for each enzyme was obtained with NADH or NADPH with either FMN or FAD.
(15) Thiosphaera pantotropha thus is similar to other heterotrophic nitrifiers-denitrifiers in that it conserves energy while denitrifying but has not been observed to do so when heterotrophically nitrifying.
(16) Nitrifying bacteria were found to be widely distributed among the products of the weathering crust of ultrabasite rocks.
(17) At higher levels of NH4-N additions, ammonium as sulphate nitrified faster than as nitrate, especially in the high concentrations of NH4-N. Nitrite was detected in small amounts of less than 10 ppm in some soils, particularly in the coarse-textured ones, regardless of the type and amount of the fertilizer applied.
(18) Laboratory experiments confirmed that nitrifying bacteria are relatively resistant to the disinfectant.
(19) We have investigated the substrate specificity of ammonia monooxygenase in whole cells of the nitrifying bacterium Nitrosomonas europaea for a number of aliphatic halogenated hydrocarbons.
(20) The examination of proton translocation of four different bacterial nitrifiers capable of pyruvic oxime [(PO), CH3-C(NOH)-COOH] nitrification and by an NH4+ oxidizing Arthrobacter sp.