Publications

kinetics of biofilm nitrification.	the reaction rates (r(nh(4) (+) ) and r(no(2) (-) )) in the two-step nitrification reaction were measured in a fluidized-sand-bed biofilm reactor under a range of steady-state conditions with respect to bulk nh(4) (+), no(2) (-), and o(2) concentrations. it was shown from theory and experiment that under low nh(4) (+) concentration conditions, if the o(2)/nh(4) (+) concentration ratio in the bulk liquid is less than the stoichiometric coefficient (3.4 mg/mg), then oxygen will be rate limiting. i ...	1982	18546355
serological diversity of nitrobacter spp. from soil and aquatic habitats.	serotypic diversity among nitrobacter spp. isolates is greater than previously reported. typing with fluorescent antibodies prepared against 11 nitrobacter spp. cultures isolated from soil and water placed the isolates into six serogroups. when these fluorescent antibodies were applied to a group of 16 additional isolates, 8 were identifiable by cross-reaction to 3 of the 11 fluorescent antibodies. some nitrite-oxidizing enrichment cultures from different habitats contained cross-reacting strain ...	1981	16345749
molecular and enzymatic properties of "cytochrome aa3"-type terminal oxidase derived from nitrobacter agilis.	cytochrome c oxidase (cytochrome aa3-type) [ec 1.9.3.1] was purified from nitrobacter agilis to an electrophoretically homogeneous state and some of its properties were studied. the enzyme showed absorption peaks at 422, 598, and 840 nm in the oxidized form, and at 442 and 606 nm in the reduced form. the co compound of the reduced enzyme showed peaks at 436 and 604 nm, and the latter peak had a shoulder at 599 nm. the enzyme possessed 1 mol of heme a and 1.6 g-atom of copper per 41,000 g, and wa ...	1981	6260762
production of no(2) and n(2)o by nitrifying bacteria at reduced concentrations of oxygen.	pure cultures of the marine ammonium-oxidizing bacterium nitrosomonas sp. were grown in the laboratory at oxygen partial pressures between 0.005 and 0.2 atm (0.18 to 7 mg/liter). low oxygen conditions induced a marked decrease in the rate for production of no(2), from 3.6 x 10 to 0.5 x 10 mmol of no(2) per cell per day. in contrast, evolution of n(2)o increased from 1 x 10 to 4.3 x 10 mmol of n per cell per day. the yield of n(2)o relative to no(2) increased from 0.3% to nearly 10% (moles of n i ...	1980	16345632
acceleration by montmorillonite of nitrification in soil.	a soil naturally containing montmorillonite (m) was amended with 10% m and sequentially perfused with glyeme, with fresh glyeme being added every 16--17d after nitrification of the previously added glycine-nitrogen had reached a plateau. in some systems, the old perfusates were replaced each time with a fresh glycine solution; in others, the initial perfusate was not replaced but only adjusted each time to the original 200 ml volume and a comparable glycine concentration (140 micrograms nh2-n/ml ...	1980	7380363
effect of temperature on nitrification intensity in soil.	the temperature dependence of nitrification can be expressed by the arrhenius equation while the time course of nitrate production can be expressed by the gomperz function. these two findings served as a basis for a mathematical model which makes it possible to calculate nitrate production in the soil even when the temperature changes once or more times during the incubation.	1980	7380364
nitrification reactions in a column of soil with a flowing nutrient solution.		1980	7380365
effect of montmorillonite and kaolinite on nitrification in soil.	a soil not naturally containing montmorillonite (m) was amended with approximately 5, 10 or 20% m or kaolinite (k), maintained in a greenhouse under periodic cultivating and alternate wetting and drying of more than two years, and then used in perfusion studies. the incorporation of m enhanced the rate of both heterotrophic degradation of glycine and subsequent autotrophic nitrification in direct relation to the amounts of m added. in soil amended with k, neither degradation nor nitrification wa ...	1980	7380366
sequential nitrification by an alcaligenes sp. and nitrobacter agilis.	the ecological importance of heterotrophic nitrification has been difficult to assess because of low levels of nitrification associated with this phenomenon. nitrification by a soil isolate, an alcaligenes sp., which oxidizes pyruvic oxime to produce up to 1867 mg nitrite-nitrogen/l, is described. sequential nitrification with the chemoautotroph nitrobacter agilis, atcc 14123, resulted in nitrate accumulation and a concomitant decrease of the nitrite produced by the alcaligenes sp. when the bact ...	1980	7459725
cytochrome oxidase of nitrobacter agilis: isolation by hydrophobic interaction chromatography.	cytochrome oxidase has been purified from nitrobacter agilis using hydrophobic interaction chromatography. the purified preparation contained 3-5% phospholipid and migrated as a single band during polyacrylamide gel electrophoresis under nondissociating conditions, but appeared as three bands in the presence of sodium dodecyl sulfate and 6 m urea. these three bands corresponded to molecular weights of 37 000, 25 000, and 13 000. the absorption spectra of cytochrome oxidase isolated from nitrobac ...	1980	6260319
effect of high concentrations of nitrogen on mixed populations of nitrifying bacteria isolated from industrial nitrogenous wastewaters.	the effect of high concentrations of different forms of nitrogen (nh4+, no2-, no3- and urea n) on nitrification by mixed populations of nitrosobacters isolated from nitrogen fertilizer plant wastewaters and nitrobacters isolated from effluents from a biological bed treating these wastewaters was determined. the inhibitory activity (within the concentration values for industrial wastewaters) of only the reaction products was observed, i.e. nitrites for nitrification phase i and nitrates for nitri ...	1979	92174
deoxyribonucleic acid in nitrobacter carboxysomes.	carboxysomes were isolated from nitrobacter winogradskyi and nitrobacter agilis. the icosahedral particles contained double-stranded deoxyribonucleic acid (dna). in the presence of ethidium bromide and cesium chloride, the particle-bound dna had a buoyant density of rho 25 = 1.701 g/cm3. electron microscopy revealed the dna to be a 14-micron circular molecule.	1979	227833
subunits of cytochrome a-type terminal oxidases derived from thiobacillus novellus and nitrobacter agilis.	cytochrome a-type terminal oxidases derived from thiobacillus novellus and nitrobacter agilis have been purified to a homogeneous state as judged from their electrophoretic behavior and their subunit structures studied by polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate. the t. novellus enzyme is composed of two kinds of subunits of 32,000 and 23,000 daltons and its minimum molecular weight is 55,000 on the basis of heme content and amino acid composition. the n. agil ...	1979	229103
effect of benomyl and its hydrolysis products, mbc and ab, on nitrification in a flooded soil.		1979	444723
studies on the relationship between lectins from axinella polypoides agglutinating bacteria and human erythrocytes.		1978	731069
[participation of nitrifying bacteria in the disintegration of serpentinous ultrabasic rock].	nitrifying bacteria were found to be widely distributed among the products of the weathering crust of ultrabasite rocks. nitrosospira briensis and nitrobacter winogradskyi involved in the first and second phases of nitrification, respectively, were detected and isolated as pure cultures. in experiments conducted with a pure culture of nitrosospira briensis, a correlation was established between degradation of serpentinite by this culture and an increase in the content of nitrites in the growth m ...	1978	745561
phosphoribulokinase from nitrobacter winogradskyi: activation by reduced nicotinamide adenine dinucleotide and inhibition by pyridoxal phosphate.	co2 fixation by particle-free extracts from nitrobacter winogradskyi increased by addition of reduced nicotinamide adenine dinucleotide (nadh). ribulose-1,5-diphosphate, however, increased co2 fixation, even in the absence of nadh. phosphoribulokinase (ec 2.7.1.19) was the enzyme of nitrobacter extracts that was activated specifically by nadh. pyridoxal-5-phosphate inhibited both co2 fixation and nadh-activated phosphoribulokinase from nitrobacter. however, it did not affect phosphoribulokinase ...	1977	15976
the influence of some herbicides on selected groups of microorganisms in loess and sandy soils. ii. the effect of nitrification.	studies on the effect of herbicides on nitrification in field and laboratory conditions have shown that steady use of these substances in the same field does not exert a significant effect on this process in the soil. the herbicides caused only shortlasting disturbances. nitrification usually returned to a relative equilibrium in several days after the herbicide application.	1977	67749
icosahedral inclusions (carboxysomes) of nitrobacter agilis.	the icosahedral bodies of nitrobacter agilis are about 120 nm in diameter and, as viewed by electron microscopy, consist of an outer shell enclosing 10-nm particles. the inner 10-nm particle is the enzyme d-ribulose 1,5-bisphosphate carboxylase. the bodies isolated from cells incubated 1 month without nitrite had a specific activity for the enzyme of 0.54 mu mol of co2 fixed per min per mg of protein.	1977	199579
nitrification in histosols: a potential role for the heterotrophic nitrifier.	insufficient populations of nitrosomonas and nitrobacter were found in a pahokee muck soil (lithic medidaprit) to account for the nitrate concentration observed. to determine if heterotrophic nitrifiers could account for some of this discrepancy, a method was developed to measure the levels of heterotrophic nitrifiers in soil. a population of 4.1 x 10(5) arthrobacter per g of dry fallow soil, capable of producing nitrite and/or nitrate from reduced nitrogenous compounds, was observed. amendment ...	1977	869537
nitrate reduction to nitrite, a possible source of nitrite for growth of nitrite-oxidizing bacteria.	growth yields and other parameters characterizing the kinetics of growth of nitrite-oxidizing bacteria are presented. these parameters were measured during laboratory enrichments of soil samples with added nitrite. they were then used to reanalyze data for nitrite oxidizer growth in a previously reported field study (m. g. volz, l. w. belser, m. s. ardakani, and a. d. mclaren, j. environ. qual. 4:179-182, 1975), where nitrate, but not nitrite or ammonium, was added. in that report, analysis of t ...	1977	921264
nitrification in the intertidal zone: influence of effluent type and effect of tannin on nitrifiers.	nitrification by intertidal sediments was measured by using a tide simulator that approximated the cycle of seawater on tidal flats. sediments were chosen from sites affected by industrial and municipal effluents and pastoral seepage and runoff. the ability of sediments from different sites to nitrify endogenous nitrogen varied markedly. all sites exhibited an initial lag before activity commenced. the duration of this lag and the rate of nitrate production were different at each site. the sedim ...	1977	931375
enzymatic studies on autotrophically, mixotrophically and heterotrophically grown nitrobacter agilis with special reference to nitrite oxidase.	nitrobacter agilis was grown autotrophically on nitrite, mixotrophically on nitrite together with either acetate or pyruvate and heterotrophically on acetate and casamino acids, pyruvate and casamino acids or pyruvate and nitrate. the enzymatic activities differed most in the key enzymes of lithotrophic metabolism. nitrite oxidase was repressed 90% in 10 days after transition to heterotrophic growth and was no longer detectable after several transfers. the induction of nitrite oxidase began afte ...	1977	931509
immunofluorescence studies of nitrobacter populations in soils.	certain steps of a protocol to enumerate a bacterium directly in soil by immunofluorescence were studied with respect to the enumeration of nitrobacter in soils of diverse properties. maximal counts of nitrobacter were obtained by varying factors involved in the release of bacteria from the soil. differences with respect to these factors were related to soil-colloidal properties. enumeration protocols modified with regard to soil properties were used with strain-specific fluorescent antibodies ( ...	1977	329959
[ability of obligate methylotrophs to perform nitrogen fixation].	the ability for nitrification was studied among mesophilic and thermophilic cultures of obligate methylotrophs methylobacter ucrainicus, methylomonas methanica, and methylococcus thermophilus. the strains were almost incapable of nitrification under autotrophic conditions. in the presence of methane, however, they oxidized nh+4 to no-2: over 150 mg/litre no-2 nitrogen was found in the cultural broth. therefore, obligate methylotrophs are capable of heterotrophic nitrification. the level of nitri ...	1977	404513
growth of nitrobacter in the presence of organic matter. i. mixotrophic growth.	1. culture filtrates of heterotrophic bacteria were tested for their stimulatory effect on nitrification of three strains of nitrobacter. 2. yeast extract-peptone solution, in which pseudomonas fluorescens had grown, after removal of the cells was added to autotrophically growing cultures of nitrobacter agilis; it caused a stimulated nitrite oxidation and growth of nitrobacter agilis. 3. the degree of stimulation depended on: a) the proportion of the culture filtrate to the autotrophic medium; b ...	1976	821450
growth of nitrobacter in the presence of organic matter. ii. chemoorganotrophic growth of nitrobacter agilis.	1. after a resting period of up to 6 months cells of nitrobacter agilis grow with acetate, formate, and pyruvate as carbon and energy source. yeast extract and peptone were added to supply the organism with nitrogen and to meet possible vitamin requirements. 2. the length of the growth period depends on the substrate; it increases according to the following sequence: pyruvate, formate, acetate. the highest growth yield is observed with pyruvate, the lowest with formate. 3. o2 consumption is incr ...	1976	942282
lipids of nitrobacter and effects of cultural conditions on fatty acid composition.	the nitrite-oxidizing autotroph, nitrobacter was studied with respect to fatty acid composition and lipids. one fatty acid, shown to be cis-11-actadecenoic acid (cis-vaccenic) accounted for almost 96% of the total fatty acids of the extractable lipids of nitrobacter agilis, nitrobacter winogradskyi and each of several isolates from minnesota and moroccan soils studied. the cis-vaccenic acid was high in all organisms, ranging from 85 to 95% when grown at 27degreesc in the log growth phase, the ot ...	1976	949483
[phage-like particles in nitrobacter (proceedings)].		1976	983500
[chemical structure of phage-like particles nb1 (proceedings)].		1976	983501
an automated biological nitrification toxicity test.		1976	994305
the effect of ph and partial pressure of oxygen on nitrification (author's transl).	a mathematical model which describes the effect of ph and dissolved oxygen on growth and activity of nitrosomonas and nitrobacter in mixed culture is presented. a good fit is obtained between experimental data and theoretical curves computed with parameters estimated by independent methods. experimental data together with simulation studies show that inadequate aeration induces a temporal shift of ammonium and nitrite oxidations resulting in a transient nitrite accumulation similar to that cause ...	1976	7988
[effect of fertilizers on the number of bacteria involved in the turnover of nitrogen in pond water of the astrakhan region].	the type of intensification affects the distribution of bacteria involved in turnover of nitrogen in pond water. green fertilizers (reed) stimulate the number of nitrogen-fixing bacteria, and the number and activity of nitrifying bacteria, to a higher degree than nitrogen and phosphorus fertilizers. reed is recommended as the main means for intensification of spawning ponds of the astrakhan region.	1976	137355
energy-conserving reactions in phosphorylating electron-transport particles from nitrobacter winogradskyi. activation of nitrite oxidation by the electrical component of the protonmotive force.	1. in electron-transport particles (et particles) prepared from nitrobacter winogradskyi, the uncoupling agent carbonyl cyanide phenylhydrazone increased the rate of nadh oxidation but decreased the rate of oxidation of no2-. its effectiveness in stimulating nadh oxidation closely paralleled its effectiveness in inhibiting no2- oxidation. 2. in the presence of adp and phosphate the oxidation of nadh was stimulated, whereas the oxidation of no2- was inhibited. in the presence of excess of pi the ...	1976	182152
reduction of cytochromes by nitrite in electron-transport particles from nitrobacter winogradskyi: proposal of a mechanism for h+ translocation.	1. a novel component in the respiratory chain of nitrobacter winogradskyi was identified. this component absorbs maximally at 552.5 nm when in its reduced form, has an eo' (ph7.0) value of-110mv and undergoes reduction by a mechanism involving the transfer of a single electron. 2. degrees of reduction of cytochromes c and a1 in electron-transport (et) particles were monitored during the course of no2- oxidation, and the effects of adp together with pi, oligomycin and of carbonyl cyanide phenylhy ...	1976	182153
paramagnetic centers of the nitrite oxidizing bacterium nitrobacter.		1976	182548
adenine nucleotide pool variations in intact nitrobacter winogradskyi cells.	1. the atp pool in nitrobacter winogradskyi cells was determined by means of the luciferin-luciferase enzyme system and the adp and amp pools were measured after enzymatic conversion into atp. 2. in the first 10 min after addition of nitrite to endogenously respiring cells, which had stood for 5--16 days after completion of the nitrite oxidation, the atp pool dropped about 60%. 3. during the log phase the atp pool was approx. 20--40 pmoles/5 mug cell-n. during growth it increased exponentially b ...	1975	808183
effects of a nitrate reductase inactivating enzyme and nad(p)h on the nitrate reductase from higher plants and neurospora.	evidence is presented which suggests that the nad(p)h-cytochrome c reductase component of nitrate reductase is the main site of action of the inactivating enzyme. when tested on the nitrate reductase (nadh) from the maize root and scutella, the nadh-cytochrome c reductase was inactivated at a greater rate than was the fadh2-nitrate reductase component. with the neurospora nitrate reductase (nadph) only the nadph-cytochrome c reductase was inactivated. p-chloromercuribenzoate at 50 mum, which gav ...	1975	235300
study of the regulation of oxidation and co2 assimilation in intact nitrobacter winogradskyi cells.	1. changes of the adenine nucleotides in resting and growing nitrobacter winogradskyi cells were measured in connection with regulating processes during nitrite oxidation and endogenous respiration. 2. after the addition of nitrite to endogenously respiring cells the atp pool increased strongly during the first 60 sec at the expense of the adp pool. at this point the energy charge was approx. 0.55. after the first 90 sec the atp pool dropped, oscillating, to a lower level. the co2 assimilation b ...	1975	239654
autoradiography and immunofluorescence combined for autecological study of single cell activity with nitrobacter as a model system.	specific detection of a particular bacterium by immunofluorescence was combined with estimation of its metabolic activity by autoradiography. the nitrifying bacteria nitrobacter agilis and n. winogradskyi were used as a model system. nitrobacter were incubated with nah14co3 and 14co2 prior to study. the same preparations made for autoradiograms were stained with fluorescent antibodies specific for the nitrobacter species. examination by epifluorescence and transmitted dark-field microscopy revea ...	1975	1103733
nitrification on a coral reef.	we report that the algal pavement just behind the reef crest at enewetak atoll produces nitrate at measurable rates. in situ and in vitro incubations with n-serve indicate that the autotrophic pathway involving two separate organisms is effective in this oxidation of ammonia to nitrate. significant nitrification is indicated throughout the reef environment; nitrobacter agilis has specifically been identified as at least one of the organisms responsible for the terminal oxidation of nitrite to ni ...	1975	1182616
inactivation of nitrate reductase by nadh in nitrobacter agilis.		1974	4154046
mechanisms of inorganic oxidation and energy coupling.		1974	4215368
[reconstruction of capside structures in isometrical viruses with an equidensites rotation method (author's transl)].		1974	4437762
[the effect of temperature on the rat of oxidation of ammonia to nitrate by mixed cultures of nitrifying organisms (author's transl)].		1974	4468751
autecological study of the chemoautotroph nitrobacter by immunofluorescence.	fluorescent antibodies (fa) prepared for nitrobacter agilis and n. winogradskyi were highly reactive in homologous staining. low-level cross-reactions between the two species were removed by adsorption. all 15 pure-culture isolates of nitrobacter tested reacted strongly with either n. agilis fa or n. winogradskyi fa. all pure-culture isolates from soils were determined to be n. winogradskyi; those from mammoth cave sediments and a cattle waste oxidation ditch were n. agilis. no cross-reaction wa ...	1974	4589121
[characterization of a phage-like particle from cells of nitrobacter. iii. on the dna-content].		1974	4614734
[characterization of a phage-like particle from cells of nitrobacter. i. host-particle correlation and particle isolation (author's transl)].		1974	4836295
[characterization of a phage-like particle from cells of nitrobacter. ii. structure and size (author's transl)].		1974	4836296
molar growth yield of nitrobacter winogradskyi during exponential growth.		1974	4847497
[resistance testing of the pathogens in urinary tract infections on agar dip-slides].		1973	4201354
[submicroscopic structure of the bacterial cell wall (review of the literature)].		1973	4206610
growth of obligate autotrophic bacteria on glucose in a continuous flow-through apparatus.	nitrosomonas europaea, nitrobacter agilis, thiobacillus denitrificans, t. neapolitanus, and t. thioparus (all obligate autotrophic bacteria) have been grown in dialysis culture, on glucose salts media, in the absence of their specific inorganic energy source. metabolic products for n. agilis grown on nitrite salts medium were identified as keto acids. pyruvic acid inhibited this organism at 5 x 10(-5)m. keto acids were not inhibitory for the thiobacilli grown on thiosulfate medium. however, when ...	1972	4551747
the meaning of "reversed electron flow" and "high energy electron" in biochemistry.		1972	4561837
membrane proteins: a perspective.		1972	4338418
the oxidation-reduction potentials and rates of oxidation of the cytochromes of nitrobacter agilis.		1972	4346634
[structure and function relationship in reactivating cells of nitrobacter winogradskyi buch].		1972	4145611
growth of mixed cultures of autotrophic and heterotrophic organisms.		1972	4622985
[determination of the activity of nitrifying bacteria in surface waters by a modified bod-test].		1972	4660907
glycine-cytochrome c reductase from nitrobacter agilis.		1972	5016640
[synthesis and breakdown of the polyphosphate fraction in cells of nitrobacter winogradskyi buch].		1972	5025030
co 2 partial pressure and enthalpy and thermodynamic efficiency of the oxidation of nitrite by nitrobacter.		1972	5045927
similarities between hyphomicrobium and nitrobacter with respect to fatty acids.	vaccenic acid (11-18:1) accounted for 92% of the fatty acids in the extractable lipids of log-phase nitrobacter and hyphomicrobium. during the stationary phase, both genera formed a 19-carbon cyclopropane fatty acid which increased in proportion to a decrease in the amount of vaccenic acid.	1972	5057773
[microbial ecology of moroccari soils. i. seasonal fluctuations].		1972	5077031
metabolism of inorganic nitrogen compounds in plants and micro-organisms.		1972	5085571
reliable procedure for silica gel preparation.	a simple and reliable method is described for preparation of silica gel media for nitrosomonas and nitrobacter species.	1972	16349945
[the isotope method for the determination of the nitrogen-fixing ability of oligonitrophilous bacteria].		1971	5153498
the scope of the eater pollution problem.		1971	5161226
the antibacterial effect of dry tomato plants, onion peels, and guava leaves on soil microorganisms.		1971	5172508
metabolism of 35 s-sulphate and properties of aps-kinase and paps-reductase in nitrobacter agilis.		1971	4398092
[effect of light on the metabolism of non-photosynthesizing microorganisms].		1971	4935598
comparison of the morphology and deoxyribonucleic acid composition of 27 strains of nitrifying bacteria.	the gross morphology, fine structure, and per cent guanine plus cytosine (gc) composition of deoxyribonucleic acid of 27 strains of nitrifying bacteria were compared. based on morphological differences, the ammonia-oxidizing bacteria were separated into four genera. nitrosomonas species and nitrosocystis species formed one homogenous group, and nitrosolobus species and nitrosospira species formed a second homogenous group in respect to their deoxyribonucleic acid gc compositions. similarly, the ...	1971	4939767
[utilization by microorganisms of single-carbon compounds].		1971	4949198
changes in cytochrome content and turnover number during growth of nitrobacter.		1971	5541690
autotrophic growth and synthesis of reserve polymers in nitrobacter winogradskyi.		1971	5552133
purification and properties of atp-sulphurylase from nitrobacter agilis.		1971	4323859
the effect of two herbicies (cipc and eptam) on oxidative phosphorylation by nitrobacter agilis.		1971	4324546
[structural and functional changes in reactivating cells of nitrobacter winogradskyi buch].		1971	4326910
the microbial ecology of the activated sludge process.		1971	4347114
lack of distinction between nitrobacter agilis and nitrobacter winografskyi.	no adequate criteria were established to distinguish between nitrobacter agilis and n. winogradskyi. however, very gentle preparative techniques permitted demonstration of flagella in n. agilis.	1971	4109868
effects of pesticides on nitrite oxidation by nitrobacter agilis.	the influence of pesticides on the growth of nitrobacter agilis in aerated cultures and on the respiration of n. agilis cell suspensions and cell-free extracts was studied. two pesticides, aldrin and simazine, were not inhibitory to growth of nitrobacter, but five compounds [isopropyl n-(3-chlorophenyl) carbamate (cipc), chlordane, 1,1-dichloro-2,2-bis (p-chlorophenyl) ethane (ddd), heptachlor, and lindane] prevented growth when added to the medium at a concentration of 10 mug/ml. whereas cipc a ...	1970	4314375
characterization of the particulate nitrite oxidase and its component activities from the chemoautotroph nitrobacter agilis.		1970	4394298
intermediary metabolism of carbon compounds by nitrifying bacteria.		1970	5426270
[interrelationship between light and chemosynthesis in nitrobacter winogradskyi].		1970	5437117
particulate formate oxidase from nitrobacter agilis.		1970	5471292
effects of some phenylamide herbicides and their degradation products on soil nitrification.		1970	5471337
calorimetric determination of free energy efficiency in nitrobacter winogradskyi.		1970	5516608
characterization of cytochrome c from nitrobacter agilis.		1969	4984114
the biochemistry of nitrifying microorganisms.		1969	4893925
the fine structure of frozen etched nitrobacter cells.		1969	4907019
[morphological and physiological studies of nitrobacter winogradsi buch].		1969	5383861
effect of sodium, manganese and zinc on the activity of nitrobacter agilis.		1969	5395141
effect of some vitamins on nitrite oxidation by nitrobacter agilis.		1969	5395935
[studies on the calcium and potassium requirements of nitrobacter winogradskyi buch].		1969	5766673
ultrastructure of nitrobacter agilis grown under autotrophic and heterotrophic conditions.	nitrobacter agilis, grown through seven transfers heterotrophically in the absence of nitrite, was examined in the electron microscope. the ultrastructure of such cells closely resembled that of autotrophically grown n. agilis. it was thus futher established that the organisms growing heterotrophically were indeed n. agilis and, therefore, that n. agilis is a facultative autotroph. acetate incorporation into poly-beta-hydroxybutyrate was confirmed cytologically.	1969	5773036
the action spectrum of hemoprotein oxidase in nitrobacter agilis.		1969	5787691
inhibition of nitrifying bacteria by grass and forb root extracts.		1969	5798521
nitrite oxidase and nitrate reductase in nitrobacter agilis.	nitrite oxidase and nitrate reductase in nitrobacter agilis were shown to be separate enzymes. the best separation of the two systems was achieved by ammonium sulphate fractionation. the effects of various compounds, including antimycin a, 2-n-heptyl-4-hydroxyquinoline n-oxide and chlorate, also clearly distinguish between the two enzyme reactions. the relationship between the two opposing reactions in nitrobacter is discussed.	1969	5807206
fatty acids in the lipids of marine and terrestrial nitrifying bacteria.	fatty acids in the lipids of 19 marine and terrestrial nitrifying bacteria have been analyzed. ammonia-oxidizing bacteria have a very simple acid composition; palmitic and palmitoleic acid account for 96 to 100% of the total acids. the fatty acids of nitrite-oxidizing bacteria cover a wider range, from c(14) to c(19), but from two to four acids still account for more than 80% of the total acids. branched iso- and anteiso-acids are present in traces only in 2 of the 19 bacteria. the chemical and ...	1969	5808068
generation of reducing power in chemosynthesis. v. the mechanism of pyridine nucleotide reduction by nitrite in the chemoautotroph nitrobacter agilis.		1969	4305696