Publications

a study of the bacillus (leptothrix?) pyogenes filiformis (nov. spec.) and of its pathogenic action.		1896	19866797
meningitis associated with a leptothrix bacillus.		1909	19973987
multiple liver abscesses caused by a leptothrix, with a review of leptothrical infection.		1933	19970060
leptothrix as a cause of brain abscess; report of two cases.		1949	15391852
oculoglandular conjunctivitis due to leptothrix.		1950	14779254
[leptothrix--an unusual causative agent of a pleuroempyema].		1951	14814807
leptotrichia (leptothrix) vaginalis.		1952	14952533
leptotrichosis conjunctivae.		1952	14925305
the occurrence of leptothrix ochracea in natural waters in the adelaide hills.		1952	12977684
treatment before the era of antibiotics of a case of prolonged unusual cellulitis of the face and neck following the extraction of a first maxillary molar due to leptothrix.		1952	13003152
leptothricosis conjunctivae (parinaud's conjunctivitis): report of 13 cases; relationship to cat-scratch disease.		1952	13136404
[seborrhea sicca on hair simulating clinical symptoms of piedra and leptotricosis].		1952	13032214
[peculiar cytology of the vaginal smear in pregnancy caused by filiform microorganisms].		1953	13147490
[not available].		1954	14356535
[differential diagnosis of parinaud's conjunctivo-glandular syndrome].		1955	14352779
leptothrix racemosa in open cavities.		1955	13242729
[not available].		1957	13398661
[studies on metabolic physiology of iron bacteria leptothrix ochracea kutzing].		1957	13522127
the morphology of leptotrichia species.		1958	13611186
cell-wall composition of leptotrichia spp.		1959	13657058
leptospirosis.		1960	13857564
the classification of organisms termed leptotrichia (leptothrix) buccalis. iv. physiological and biochemical characteristics of bacterionema matruchotii.		1961	13716258
agglutinins for 11 types of leptospires in serum from cattle in northeastern texas.		1961	13735699
leptospirosis of white laboratory rats.		1961	13702743
the classification of organisms termed leptotrichia (leptothrix) buccalis. iii. growth and biochemical characteristics of bacterionema matruchotil.		1961	13705432
the classification of organisms termed leptotrichia (leptothrix) buccalis. i. review of the literature and proposed separation into leptotrichia buccalis trevisan, 1879 and bacterionema gen. nov., b. matruchotti (mendel, 1919) comb. nov.		1961	13705433
the classification of organisms termed leptotrichia (leptothrix) buccalis. ii. reproduction of bacterionema matruchotii.		1961	13705434
the formation of calculus-like deposits by pure cultures of bacteria.		1961	14014604
isolation, growth requirements, and pathogenicity for rabbits of leptotrichia dentium.		1962	13919403
serological specificity of acid-soluble antigens of bacterionema matruchottii.	sibal, louis r. (university of illinois college of medicine, chicago), arthur v. kroeger, dan kumarich, and esther meyer. serological specificity of acid-soluble antigens of bacterionema matruchottii. j. bacteriol. 83:811-818. 1962.-the serological specificity of acid-soluble antigens extracted from the oral, filamentous organism, bacterionema matruchottii, was demonstrated by the microprecipitin reaction. there was no evidence of cross-reaction with antisera prepared against leptotrichia buccal ...	1962	13912471
serology of bacterionema matruchotii.	schmidt, jean m. (state university of iowa, iowa city) and robert l. richardson. serology of bacterionema matruchotii. j. bacteriol. 83:584-589. 1962.-serological relationships of bacterionema matruchotii were studied by means of the complement-fixation reaction. a common complement-fixing antigen was demonstrated in 37 strains of this organism. serological relationships to species in the genera mycobacterium, nocardia, actinomyces, and corynebacterium were shown by means of reciprocal complemen ...	1962	13908761
acridine-orange fluorescence microscopy in the detection of pathogenic vaginal flora.		1962	13996093
prevalence of actin-omyces israelii, a. naeslundii, bacterionema matruchotii, and candida albicans in selected areas of the oral cavity and saliva.		1962	13955156
the morphology of an anaerobic oral filamentous microorganism as revealed by electron microscopy.		1962	13980846
electron microscopy of intracellular mineralization of oral filamentous microorganisms in vitro.		1963	13984628
attempt to stimulate dental calculi in cats by subgingival implantation of bacterionema matruchotii.		1963	14081968
[experimental research on the pathogenicity of certain ferruginous bacteria].		1963	14170979
investigations on the sphaerotilusleptothrix group.		1963	14047145
selective medium for fusobacteria and leptotrichia.		1963	14051807
immunochemical analysis of human oral strains of fusobacterium and leptotrichia.	de araujo, wilson c. (national institute of dental research, bethesda, md.), eileen varah, and stephan e. mergenhagen. immunochemical analysis of human oral strains of fusobacterium and leptotrichia. j. bacteriol. 86:837-844. 1963.-lipopolysaccharides, isolated by phenol-water extraction of 27 strains of oral gram-negative bacteria conforming either to fusobacterium polymorphum or leptotrichia buccalis, were shown to be endotoxic by their ability to alter dermal reactivity to epinephrine and to ...	1963	14066482
[on the diagnosis and therapy of actinomycosis and leptotrichosis].		1963	14053077
[on tonsillar leptotrichosis].		1964	14260403
growth of a leptothrix strain in a chemically defined medium.		1964	14215439
[a method of quantitative estimation of manganese-oxidizing leptothrix].		1965	5332735
[studies on the incidence of leptothrix vaginalis in vaginal smears].		1966	5979517
[on the composition of manganese oxides in metallogenium and leptothrix cultures].		1967	5618848
[clinico-statistical studies of the presence of leptothrix in the vaginal smear].		1968	5730363
[role of leptothrix in the origin and development of oral soft tissues changes].		1968	5293755
induction of streptococcal chaining in microcultures of oral epithelial cells: leptothrix hyphae.		1969	5259254
[bacteria of the sphaerotilus-leptothrix group].		1969	4926574
[leptothrix in the vaginal smear. findings in 132 cases].		1970	5531795
[leptotrichia (leptothrix) vaginalis].		1972	4671249
leptothrix.		1972	4501871
[therapeutic results achieved through the advantage of a combination of oral metronidazole and vaginal natamycin tablets in urogenital protozoan, trichobacterial and blastomyces infections].	vaginal inflammations caused by trichomonas, leptothrix vaginalis or candida and other less common organisms respectively, were treated very successfully with a combination of metronidazole orally and a natamycin preparation vaginally (pimafucin vaginal tablets). in women with urogenital trichomoniasis a cure was obtained in 96,1% of the cases (microbiologically controlled); candida mycoses of the vagina were cured clinically in 89% of the cases after the first course of treatment and mycologica ...	1975	1082689
the sphaerotilus-leptothrix group.		1975	1180519
some observations on the occurrence of the iron bacterium leptothrix ochracea in fresh water, including reference to large experimental enclosures.		1975	1165226
preliminary studies on the life cycle of leptothrix racemosa, a common organism in dental plaques.		1975	801605
[leptothrix vaginalis. morphological studies].	73 patients with a microscopically confirmed leptothrix vaginalis-infection were examined clinically and cytologically. 80% of the cases showed leptothrix alone or together wihh lactobacilli or cocci. 18% had trichomonas- and 2% candida-infections. 26 cases (34%) showed inflammation of the vagina. the majority of infection was found in the age group 26 to 45 years. a microscopical examination of the leptothrix-filaments revealed a subtile segmentation and sporulation.	1976	1261954
the sphaerotilus-leptothrix group of bacteria.		1978	353479
[functional significance of bivalent iron and manganese oxidation in leptothrix pseudoochraceae].	the effect of oxidation of bivalent compounds of iron and manganese was studied on the growth of filamentous iron bacteria. the stimulating action of these metals could not be attributed to utilization of the energy of their oxidation in the assimilation of carbon dioxide or in lithoheterotrophic processes. the cells yield increased because the metal ions removed the toxic metabolite, hydrogen peroxide, which was formed in the respiratory chain upon oxidation of an organic substrate. this functi ...	1978	713873
[the role of anaerobe adhesion in the colonization of the vaginal mucosa].	some our previous research works on bacterial adhesion to vaginal cells in the different phases of the menstruum showed that adhesion changes depending on changing environmental conditions. we therefore considered interesting to extend our investigations to anaerobic flora, in the light of recent observations intended to attribute an important role to anaerobic flora in the pathogenesis of vaginitis. the results obtained so far indicate that the maximum adhesion capability is found in the middle ...	1979	45241
[cytomorphological changes and intensity of inflammation in cervico-vaginal smears containing trichomonas vaginalis, candida albicans, and leptothrix vaginalis].		1980	7412371
[recognition of the importance of leptothrix vaginalis in the pathology of female genitalia].		1981	7278828
the clinical diagnosis of trichomoniasis.	two hundred twenty-six consecutive women attending an inner-city clinic for sexually transmitted diseases were evaluated. problem-directed histories and physical examinations were conducted and vaginal specimens for wet preparation and trichomonas vaginalis culture were obtained from each patient. one hundred patients were found to be infected. patients with multiple sex partners were found to be at increased risk of trichomoniasis (p less than .05). those with abnormal discharge noted on examin ...	1982	6896368
[biosynthesis of phenylalanine and tyrosine: arogenic acid, a new intermediate product].	with the discovery of arogenic acid two new pathways for the biosynthesis of phenylalanine and tyrosine have been revealed. the occurrence of two, three, or four pathways for the biosynthesis of phenylalanine and tyrosine in microorganisms and plants may be a useful tool for taxonomic classifications. investigations on enterobacteriaceae, pseudomonads, flavobacteria, streptomycetes, archaebacteria, and on sphaerotilus, trichococcus and leptothrix species from bulking sludge are described. the po ...	1983	6855918
nocardia gypsoides corneal ulcer.	nocardia gypsoides, a species characterised by its ability to produce calcium sulphate granules, has been isolated for the first time from a corneal ulcer. in vivo this pseudomycete also forms gypsum. every effort should be made to identify actinomycetales to species level. the names leptothrix and streptothrix should be abandoned.	1984	6696871
cat scratch disease bacilli in the conjunctiva of patients with parinaud's oculoglandular syndrome.	unilateral conjunctivitis with regional lymphadenitis has been designated parinaud's oculoglandular syndrome (pogs). the cause has been attributed to various infectious agents, especially leptothrix and the unidentified agent of cat scratch disease (csd). in 1983-84 the cause of csd in lymph node and skin was established as small pleomorphic gram-negative bacilli. we now report identical bacteria in the conjunctival lesions of 9 of 24 patients with pogs. this confirms the belief that the csd bac ...	1985	4058889
influence of manganese on growth of a sheathless strain of leptothrix discophora.	mn exerted various effects on the growth of leptothrix discophora strain ss-1 in batch cultures depending on the concentration added to the medium. concentrations of 0.55 to 5.5 mum mn, comparable to those in the environment from which strain ss-1 was isolated, decreased cell yield and prolonged stationary-phase survival, but did not affect growth rate. elevated concentrations of 55 to 910 mum mn also decreased cell yield and prolonged survival, but growth rate was decreased as well. the additio ...	1985	16346750
[morphology of fungi in the slides prepared from esophageal balloons].	1,762 cases were selected at random from 17,000 persons screened by esophageal balloon in 4 communes of linxian county. the morphologic appearance of fungi was studied in 4 slides of each case selected. according to the shape of clumps formed by fungi and bacteria in the slides, morphologic 4 types were seen: cotton-like, camel hair-like, hair-like and tree-branch-like. in the preliminary microscopic analysis, the following species of fungi were noted: candida, leptothrix, actinomyces, alternari ...	1986	3732022
characterization of extracellular mn2+-oxidizing activity and isolation of an mn2+-oxidizing protein from leptothrix discophora ss-1.	supernatant fluid from leptothrix discophora ss-1 cultures possessed high mn2+-ozidizing activity. studies of temperature and ph optima, chemical inhibition, and protease sensitivity suggested that the activity may be enzymatic. kinetic studies of unconcentrated supernatant fluid indicated an apparent km of 7 microm mn2+ in the 1 to 200 microm mn2+ range. the greatest vmax value observed was 1.4 nmol of mn2+ oxidized min-1 micrograms of protein-1 in unconcentrated samples. when the supernatant f ...	1987	3818545
manganese oxidation by leptothrix discophora.	cells of leptothrix discophora ss1 released mn2+-oxidizing factors into the medium during growth in batch culture. manganese was optimally oxidized when the medium was buffered with hepes (n-2-hydroxyethylpiperazine-n'-2-ethanesulfonic acid) at ph 7.5. manganese-oxidizing activity in the culture medium in which this strain had been grown previously was sensitive to heat, phosphate, tris, nan3, hgcl2 nacl, sodium dodecyl sulfate, and pronase; 0.5 mol of o2 was consumed per mol of mno2 formed. dur ...	1987	3804969
bacterial flora in bottled uncarbonated mineral drinking water.	a quantitative study of bacterial populations in mineral water was carried out. samples were stored at 6 and 20 degrees c, and the colony counts were determined on tryptone agar plates incubated at 22 and 37 degrees c. samples were collected from the spring source in sterile glass flasks and from the bottling factory in conventional plastic and glass containers. in both cases, the initial population (10(1)-10(2) cfu/ml water) increased to 10(5)-10(6) cfu/ml after 3 days storage as determined fro ...	1987	3446349
oxidation of manganese and iron by leptothrix discophora: use of n,n,n',n'-tetramethyl-p-phenylenediamine as an indicator of metal oxidation.	a new method for the quantification and characterization of manganese-oxidizing activity by spent culture medium of leptothrix discophora ss-1 was developed. it is based on the formation of the dye wurster blue from n,n,n',n'-tetramethyl-p-phenylenediamine by oxidized manganese generated in the spent medium. the kinetic parameters thus obtained agreed well with data obtained with other methods. it was also possible to demonstrate iron oxidation by spent culture medium. the kinetics of the proces ...	1990	16348351
freeze-substitution of gram-negative eubacteria: general cell morphology and envelope profiles.	freeze-substitution was performed on strains of escherichia coli, pasteurella multocida, campylobacter fetus, vibrio cholerae, pseudomonas aeruginosa, pseudomonas putida, aeromonas salmonicida, proteus mirabilis, haemophilus pleuropneumoniae, caulobacter crescentus, and leptothrix discophora with a substitution medium composed of 2% osmium tetroxide and 2% uranyl acetate in anhydrous acetone. a thick periplasmic gel ranging from 10.6 to 14.3 nm in width was displayed in e. coli k-12, k30, and hi ...	1991	1999383
isolation and characterization of an acidophilic, heterotrophic bacterium capable of oxidizing ferrous iron.	a heterotrophic bacterium, isolated from an acidic stream in a disused pyrite mine which contained copious growths of "acid streamers," displayed characteristics which differentiated it from previously described mesophilic acidophiles. the isolate was obligately acidophilic, with a ph range of 2.0 to 4.4 and an optimum ph of 3.0. the bacterium was unable to fix carbon dioxide but oxidized ferrous iron, although at a slower rate than either thiobacillus ferrooxidans or leptospirillum ferrooxidans ...	1992	1622207
enzymatic iron oxidation by leptothrix discophora: identification of an iron-oxidizing protein.	an iron-oxidizing factor was identified in the spent culture medium of the iron- and manganese-oxidizing bacterial strain leptothrix discophora ss-1. it appeared to be a protein, with an apparent molecular weight of approximately 150,000. its activity could be demonstrated after fractionation of the spent medium by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. a spontaneous mutant of l. discophora ss-1 was isolated which excreted neither manganese- nor iron-oxidizing activity, where ...	1992	1610168
isolation, cultural maintenance, and taxonomy of a sheath-forming strain of leptothrix discophora and characterization of manganese-oxidizing activity associated with the sheath.	leptothrix discophora sp-6 was isolated from the outflow reservoir of an artificial iron seep. its sheathforming phenotype was maintained by slow growth in a mineral salts-vitamin-pyruvate medium under minimal aeration at 20 to 25 degrees c. a sheathless variant, sp-6(sl), was isolated from smooth colonies that appeared on spread plates after rapid growth of sp-6 in well-aerated cultures. sp-6 and sp-6(sl) are closely related but not identical to the previously studied sheathless strain ss-1 (at ...	1992	16348826
ultrastructure and chemical composition of the sheath of leptothrix discophora sp-6.	light microscopy and transmission electron microscopy of thin sections and metal-shadowed specimens showed that the sheath of leptothrix discophora sp-6 (atcc 51168) is a tube-like extracellular polymeric structure consisting of a condensed fabric of 6.5-nm-diameter fibrils underlying a more diffuse outer capsular layer. in thin sections, outer membrane bridges seen to contact the inner sheath layer suggested that the sheath fabric was attached to the outer layer of the gram-negative cell wall. ...	1993	7504663
role of disulfide bonds in maintaining the structural integrity of the sheath of leptothrix discophora sp-6.	isolated sheaths of leptothrix discophora sp-6 (atcc 51168) were tested for susceptibility to degradation by a variety of chemical denaturants and lytic enzymes and found to be resistant to many reagents and enzyme treatments. however, disulfide bond-reducing agents such as dithiothreitol (dtt), beta-mercaptoethanol, sodium cyanide, and sodium sulfite degraded the sheath, especially at elevated ph (ph 9) and temperature (50 degrees c). dtt and beta-mercaptoethanol caused more rapid degradation o ...	1993	8253670
structure and composition of biological slimes on paper and board machines.	biological slimes (biofilms) collected from the wet end of paper and board machines were examined by electron microscopy and analyzed for fatty acid composition, neutral sugar composition, and atp. electron microscopy revealed minuscule prokaryotic organisms (diameter, 0.2 to 0.4 mum). larger cells morphologically resembling sphaerotilus and leptothrix spp. were found in slimes from machines using recycled fiber or unbleached pulp. the bacteria were embedded in a slimy matrix and often contained ...	1994	16349191
investigation of an iron-oxidizing microbial mat community located near aarhus, denmark: field studies.	we investigated the microbial community that developed at an iron seep where anoxic groundwater containing up to 250 mum fe flowed out of a rock wall and dense, mat-like aggregations of ferric hydroxides formed at the oxic-anoxic interface. in situ analysis with oxygen microelectrodes revealed that the oxygen concentrations in the mat were rarely more than 50% of air saturation and that the oxygen penetration depth was quite variable, ranging from <0.05 cm to several centimeters. the bulk ph of ...	1994	16349433
investigation of an iron-oxidizing microbial mat community located near aarhus, denmark: laboratory studies.	we constructed a small flow chamber in which suboxic medium containing 60 to 120 mum fecl(2) flowed up through a sample well into an aerated reservoir, thereby creating an suboxic-oxic interface similar to the physicochemical conditions that exist in natural iron seeps. when microbial mat material from the marselisborg iron seep that contained up to 10 bacterial cells per cm (d. emerson and n. p. revsbech, appl. environ. microbiol. 60:4022-4031, 1994) was placed in the sample well of the chamber ...	1994	16349434
epidemiologic differences between candidial and trichomonal infections as detected in cytologic smears in taiwan.	the epidemiologic differences between cytology-detected candidial and trichomonal infections were assessed in 15,933 women attending the 12 district health centres in the taipei area and a consecutive 1114 patients, visiting venereal disease clinics, whose smears were screened for cervical cancer between july 1991 and december 1992 in taipei. the pap smears were examined for the presence of specific organisms, such as trichomonas vaginalis, vaginal candida, herpes simplex virus, human papillomav ...	1995	8570805
characterization of bacterial communities from activated sludge: culture-dependent numerical identification versus in situ identification using group- and genus-specific rrna-targeted oligonucleotide probes	the structures of bacterial communities were studied in activated sludge samples obtained from the aerobic and anaerobic zones of a wastewater treatment plant showing enhanced phosphorous removal. samples were analyzed by in situ hybridization with oligonucleotide probes complementary to selected regions of the 16s and 23s ribosomal rna (rrna) characteristic for defined phylogenetic entities (genera and larger groups). the microbial community structures revealed by molecular techniques were comp ...	1996	8688004
phylogeny of the sphaerotilus-leptothrix group inferred from morphological comparisons, genomic fingerprinting, and 16s ribosomal dna sequence analyses.	phase-contrast light microscopy revealed that only one of eight cultivated strains belonging to the sphaerotilus-leptothrix group of sheathed bacteria actually produced a sheath in standard growth media. two sphaerotilus natans strains produced branched cells, but other morphological characteristics that were used to identify these bacteria were consistent with previously published descriptions. genomic fingerprints, which were obtained by performing pcr amplification with primers corresponding ...	1996	8573492
development and application of 16s rrna-targeted probes for detection of iron- and manganese-oxidizing sheathed bacteria in environmental samples.	comparative sequence analysis of the 16s rrna genes from several leptothrix and sphaerotilus strains led to the design of an oligonucleotide probe (ps-1) based on a sequence within the hypervariable region 1 specific for four leptothrix strains and for one of the four sphaerotilus natans strains examined. another probe (psp-6) was based on a sequence within the hypervariable region 2. psp-6 was specific for one of the two evolutionary lineages previously described for leptothrix spp. (p. l. sier ...	1997	9023942
[laboratory diagnosis of bacterial vaginosis].	microbiological analysis of discharge from the genitals in passenger car conductors (5787 women and 1496 men aged 20 to 40) showed gardnerella vaginalis to be the most frequent agent of urogenital infection. it was isolated in 26% cases, whereas trichomonas were isolated in 2.5%, fungi in 1.5%, and gonococci in 0.27% cases. the diagnosis of gardnerellosis is reliable if the key cells are found. monoinfection with g. vaginalis was diagnosed in 80% patients, the overwhelming majority (74%) of carr ...	1997	9410459
ennoblement of stainless steel by the manganese-depositing bacterium leptothrix discophora.	the noble shift in open-circuit potential exhibited by microbially colonized stainless steel (ennoblement) was investigated by examining the relationship among surface colonization, manganese deposition, and open-circuit potential for stainless steel coupons exposed to batch cultures of the manganese-depositing bacterium leptothrix discophora. open-circuit potential shifted from -100 to +330 mv(infsce) as a biofilm containing 75 nmol of mno(infx) cm(sup-2) formed on the coupon surface but change ...	1997	16535635
specific ribosomal dna sequences from diverse environmental settings correlate with experimental contaminants.	phylogenetic analysis of 16s ribosomal dna (rdna) clones obtained by pcr from uncultured bacteria inhabiting a wide range of environments has increased our knowledge of bacterial diversity. one possible problem in the assessment of bacterial diversity based on sequence information is that pcr is exquisitely sensitive to contaminating 16s rdna. this raises the possibility that some putative environmental rrna sequences in fact correspond to contaminant sequences. to document potential contaminant ...	1998	9687486
production of biogenic mn oxides by leptothrix discophora ss-1 in a chemically defined growth medium and evaluation of their pb adsorption characteristics	biogenic mn oxides were produced by the bacterium leptothrix discophora ss-1 (= atcc 3182) in a chemically defined mineral salts medium, and the pb binding and specific surface area of these oxides were characterized. growth of ss-1 in the defined medium with pyruvate as a carbon and energy source required the addition of vitamin b12. complete oxidation of mn(ii) within 60 h required the addition of >/=0.1 &mgr;m feso4. pb adsorption isotherms were determined for the biogenic mn oxides (and asso ...	1999	9872777
phylogenetic relationships among members of the comamonadaceae, and description of delftia acidovorans (den dooren de jong 1926 and tamaoka et al. 1987) gen. nov., comb. nov.	the phylogenetic relationships among members of the family comamonadaceae and several unclassified strains were studied by direct sequencing of their pcr-amplified 16s rrna genes. based on the 16s rrna gene sequence analysis, members of the family formed a coherent group. the closest relatives are species of the rubrivivax sub-group: leptothrix discophora, ideonella dechloratans and rubrivivax gelatinosus. the genus hydrogenophaga formed two subclusters, as did the species of acidovorax, whereas ...	1999	10319477
roseateles depolymerans gen. nov., sp. nov., a new bacteriochlorophyll a-containing obligate aerobe belonging to the beta-subclass of the proteobacteria.	strains 61at (t = type strain) and 61b2, the first bacteriochlorophyll (bchl) a-containing obligate aerobes to be classified in the beta-subclass of the proteobacteria, were isolated from river water. the strains were originally isolated as degraders of poly(hexamethylene carbonate) (phc). the organisms can utilize phc and some other biodegradable plastics. the strains grow only under aerobic conditions. good production of bchl a and caroterioid pigments is achieved on phc agar plates and an equ ...	1999	10319464
marine bacillus spores as catalysts for oxidative precipitation and sorption of metals.	the oxidation of soluble manganese(ii) to insoluble mn(iii,iv) oxide precipitates plays an important role in the environment. these mn oxides are known to oxidize numerous organic and inorganic compounds, scavenge a variety of other metals on their highly charged surfaces, and serve as electron acceptors for anaerobic respiration. although the oxidation of mn(ii) in most environments is believed to be bacterially-mediated, the underlying mechanisms of catalysis are not well understood. in recent ...	1999	10941787
isolate pm1 populations are dominant and novel methyl tert-butyl ether-degrading bacterial in compost biofilter enrichments.	the gasoline additive mtbe, methyl tert-butyl ether, is a widespread and persistent groundwater contaminant. mtbe undergoes rapid mineralization as the sole carbon and energy source of bacterial strain pm1, isolated from an enrichment culture of compost biofilter material. in this report, we describe the results of microbial community dna profiling to assess the relative dominance of isolate pm1 and other bacterial strains cultured from the compost enrichment. three polymerase chain reaction (pc ...	2001	11321538
bacterial and archaeal populations associated with freshwater ferromanganous micronodules and sediments.	biology is believed to play a large role in the cycling of iron and manganese in many freshwater environments, but specific microbial groups indigenous to these systems have not been well characterized. to investigate the populations of bacteria and archaea associated with metal-rich sediments from green bay, wi, we extracted nucleic acids and analysed the phylogenetic relationships of cloned 16s rrna genes. because nucleic acids have not been routinely extracted from metal-rich samples, we inve ...	2001	11225719
the discs of leptothrix discophora: lost for 89 years?		2001	11390670
the effects of ph and surface composition on pb adsorption to natural freshwater biofilms.	two dominant variables that control the adsorption of toxic trace metals to suspended particulate materials and aquatic surface coatings are surface composition and solution ph. a model for the ph-dependent adsorption of pbto heterogeneous particulate surface mixtures was derived from experimental evaluation of pb adsorption to laboratory-derived surrogates. the surrogate materials were selected to represent natural reactive surface components. pb adsorption to both the laboratory surrogates and ...	2001	11505999
effect of oxide formation mechanisms on lead adsorption by biogenic manganese (hydr)oxides, iron (hydr)oxides, and their mixtures.	the effects of iron and manganese (hydr)oxide formation processes on the trace metal adsorption properties of these metal (hydr)oxides and their mixtures was investigated by measuring lead adsorption by iron and manganese (hydr)oxides prepared by a variety of methods. amorphous iron (hydr)oxide formed by fast precipitation at ph 7.5 exhibited greater pb adsorption (gamma(max) = 50 mmol of pb/mol of fe at ph 6.0) than iron (hydr)oxide formed by slow, diffusion-controlled oxidation of fe(ii) at ph ...	2002	11871557
multiple substrate growth kinetics of leptothrix discophora sp-6.	the growth parameters of leptothrix discophora sp-6 were quantified on the basis of the steady-state concentrations and utilization rates of pyruvate, dissolved oxygen, and concentration of microorganisms in a chemostat operated at 25 degrees c, ph 7.2, and an agitation rate of 350 rpm. the results showed that the microbial growth was limited by both pyruvate and dissolved oxygen. a combined growth kinetics model using monod growth kinetics for pyruvate and tessier growth kinetics for oxygen sho ...	2002	12363350
caldimonas manganoxidans gen. nov., sp. nov., a poly(3-hydroxybutyrate)-degrading, manganese-oxidizing thermophile.	a poly(3-hydroxybutyrate) (phb)-degrading, gram-negative, aerobic bacterium, strain hs(t), was isolated from a hot spring and chemotaxonomically and phylogenetically characterized. the oxidase-positive, weakly catalase-positive, non-pigmented cells (0.6 x 2.6 microm) exhibited a single polar flagellum and accumulated phb granules. strain hs(t) was capable of manganese oxidation. highest growth rate was attained at 50 degrees c. the optimum ph for growth was 7-8. the major respiratory quinone was ...	2002	12054255