| "intestinal spirochaetosis" of the vervet monkey. | electron microscopy revealed that 80% of captured vervet monkeys, held in quarantine for experimental use, showed extensive proliferation of spiral-shaped bacteria on the mucosal epithelium of the large bowel. a consortium, consisting of a predominant spirillum together with a spirochaete, was usually seen as a lawn covering the colonic epithelium. sparsely populated areas showed preferential colonization of the tubular glands. pathological changes were minimal, being confined to the microvillus ... | 1985 | 3925404 |
| three-dimensional structure of the surface layer protein of aquaspirillum serpens vha determined by electron crystallography. | the three-dimensional structure of the protein which forms the s layer of aquaspirillum serpens strain vha has been determined by electron microscopy. structures have been reconstructed to a resolution of about 1.6 nm for single-layered specimens and about 4 nm for two-layered specimens. the structure, which has hexagonal symmetry, consists of a core in the shape of a cup, with six projections arising from the rim of the cup to join adjacent subunits at the threefold symmetry axes. the model is ... | 1986 | 3745114 |
| the nitrogenase system of spirillum lipoferum. | the nitrogenase system of spirillum lipoferum was separated into three components, the normal mo-fe and fe proteins as well as an activating factor for the fe protein. the rate of activation is increased by mn2+ or by an excess of mg2+, and the process requires atp. | 1978 | 708367 |
| infection by spirilla in the stomach of the rhesus monkey. | light and electron microscopy showed gastric spirilla in the gastric mucosa of 45 clinically normal rhesus monkeys (macaca mulatta). in paraffin sections, gastric spirilla were best shown by silver impregnation stains. when stained by hematoxylin and eosin (he), gastric spirilla may be mistaken for strands of mucus. in thick sections of epon-embedded tissue, gastric spirilla looked like "corkscrews" with up to 12 coils. they were 8 microns long and 0.7 micron wide, and had characteristic bipolar ... | 1982 | 6153006 |
| [numerical taxonomy of vibrios and various comparable bacteria. ii. correlation between phenotypic similarities and dna base compositions]. | | 1966 | 5982748 |
| occurence and nature of spirilla around bombay. | | 1967 | 6036897 |
| ultrastructure of a magnetotactic spirillum. | the ultrastructure of a magnetotactic bacterium (strain ms-1) was examined by transmission, scanning, and scanning-transmission electron microscopy. the organism resembled other spirilla in general cell morphology, although some differences were detected at the ultrastructural level. electron-dense particles within magnetotactic cells were shown by energy-dispersive x-ray analysis to be localizations containing iron. a non-magnetotactic variant of strain ms-1 lacked these novel bacterial inclusi ... | 1980 | 6245069 |
| unusual cellular fatty acids and distinctive ultrastructure in a new spiral bacterium (campylobacter pyloridis) from the human gastric mucosa. | spiral bacteria, named campylobacter pyloridis, were obtained from endoscopic biopsies of the gastric antrum of 14 patients with active chronic gastritis. methyl esters of their cellular fatty acids were prepared by acid-catalysed transmethylation of whole cells. their major fatty acids were tetradecanoic acid (14:0) and cis-9,10-methyleneoctadecanoic acid (19:0 delta), with a very small amount of hexadecanoic acid (16:0). this is markedly different from the fatty acids of other campylobacter sp ... | 1985 | 3981612 |
| phylogenetic analysis of aquaspirillum magnetotacticum using polymerase chain reaction-amplified 16s rrna-specific dna. | the 16s rrna gene of the magnetotactic magnetogen aquaspirillum magnetotacticum ms1 was amplified by a polymerase chain reaction, using two eubacterial consensus oligodeoxynucleotide primers flanking the majority of the 16s rrna gene, cloned, and sequenced. phylogenetic analysis revealed that a. magnetotacticum ms1 belongs to the alpha-group of proteobacteria. this assignment offers perspective on the biochemical properties of a. magnetotacticum, since this organism is expected to have the gener ... | 1991 | 1854644 |
| [production of magnetic material by magnetic bacteria]. | | 1991 | 1875093 |
| elemental composition of bacterial metachromatic inclusions determined by electron microprobe x-ray analysis. | electron microscopy and microprobe x-ray analysis were used to study metachromatic inclusions of spirillum itersonii , corynebacterium diphtheriae, and micrococcus luteus. in situ metachromatic inclusions were electron dense and contained phosphorus and divalent cations. metachromatic inclusions isolated by anion-exchange column chromatography and by isoosmolar metrizamide density gradient centrifugation were similar in composition to in situ inclusions. | 1984 | 6427179 |
| isolation and characterization of temperature-sensitive mutants of host-dependent bdellovibrio bacteriovorus 109d. | a variety of temperature-sensitive mutants of host-dependent bdellovibrio bacteriovorus 109d were selected after ethyl methane sulfonate mutagenesis. mutants that demonstrated plaque-forming ability reversion frequencies of 10(-8) to 10(-9) were chosen for further study. representatives of these mutants were then characterized by phase-contrast and electron microscopy, temperature-shifted one-step growth experiments, attachment kinetics, and macromolecular capabilities. representative mutants de ... | 1974 | 4360541 |
| helicobacter felis gastritis in gnotobiotic rats: an animal model of helicobacter pylori gastritis. | the gastric spirillum helicobacter felis, originally isolated from the cat stomach, colonizes the stomachs of germfree rats. studies were designed to examine the pathological and serological responses of germfree rats inoculated orally with h. felis. at 2 weeks postinoculation, the gastric mucosa of germfree rats had lymphocytes and eosinophils scattered in small foci throughout the subglandular region of the antrum. small numbers of lymphocytes were present in the subglandular portion of the an ... | 1991 | 1997430 |
| a model for swimming unipolar spirilla. | a mathematical model employing slender body theory is constructed for a unipolar spirillum volutans cell with the model cell allowed to move unconstrainedly in the fluid. the results are compared with observation and previous studies and the effects of varying cell dimensions are investigated. | 1989 | 2593689 |
| cloning of histidine genes of azospirillum brasilense: organization of the abfh gene cluster and nucleotide sequence of the hisb gene. | a cluster of four azospirillum brasilense histidine biosynthetic genes, hisa, hisb, hisf and hish, was identified on a 4.5 kb dna fragment and its organization studied by complementation analysis of escherichia coli mutations and nucleotide sequence. the nucleotide sequence of a 1.3 kb fragment that complemented the e. coli hisb mutation was determined and an orf of 624 nucleotides which can code for a protein of 207 amino acids was identified. a significant base sequence homology with the carbo ... | 1989 | 2664449 |
| a rapid immunofluorescence method for the study of the association of azospirillum sp. with maize roots. | | 1982 | 6765358 |
| occurrence of azospirillum in polish soils. | n2-fixing azospirillum strains were isolated from garden soils and roots of wheat, rye, barley, oat and maize. the strains most active in c2h2 reduction were those isolated from garden soils, wheat and barley roots which produced 304 to 351 nmoles of c2h4 x h-1 per culture. the results demonstrate the presence of azospirillum in polish soils. | 1983 | 6198878 |
| [structural alterations of the murein sacculus of spirillum serpens after treatment with uranyl acetate]. | | 1969 | 4189119 |
| comparison of three microbial toxicity screening tests with the microtox test. | | 1981 | 6802203 |
| large intestine bacterial flora of nonhibernating and hibernating leopard frogs (rana pipiens). | the bacteria in the large intestines of 10 northern leopard frogs (rana pipiens) were enumerated and partially characterized. four nonhibernating frogs were collected in the summer, four hibernating frogs were collected in the winter, and two frogs just emerged from hibernation were collected in the spring. all frogs had about 10(10) bacteria per g (wet weight) of intestinal contents and about 10(9) bacteria per g (wet weight) of mucosal scraping, although the counts from the winter frogs were s ... | 1982 | 6982025 |
| anaerobiospirillum species isolated from humans with diarrhoea. | flagellated anaerobic motile spiral bacteria were isolated from the faeces of two patients with diarrhoea. they were recovered by the microaerophilic culture method used to detect campylobacters but demanded anaerobic conditions for subculture. electron microscopy and other investigations showed them to be closely related to anaerobiospirillum succiniproducens first described in beagle dogs and subsequently in three humans with bacteraemia. | 1983 | 6619308 |
| locomotion of spirilla. | the hydromechanics of spirilla locomotion is analyzed by considering the balance of both rectilinear and angular momenta of the surrounding viscous fluid which is otherwise at rest. the physical model of spirillum adopted for the present analysis consists of a rigid helical body with flagella attached to both ends of the helix. the motion is supposed to be activated first by the polar flagella, both rotating in the same sense, thus causing the helical body to rotate in the opposite sense in angu ... | 1972 | 4642227 |
| [enteral spirilla in a dog]. | | 1972 | 5032070 |
| synthesis, assembly, and localization of periplasmic cytochrome c. | | 1972 | 5057090 |
| uncoordination and recoordination in spirillum volutans. | | 1972 | 5086110 |
| isolation and identification of rumen bacteria capable of anaerobic rutin degradation. | | 1969 | 5392469 |
| nitrate reductase and soluble cytochrome c in spirillum itersonii. | the addition of nitrate to cultures of spirillum itersonii incubated under low aeration produced a diauxic growth pattern in which the second exponential phase was preceded by the appearance of nitrite in the medium. the organism also grew anaerobically in the presence of nitrate. nitrate reductase activity could be demonstrated in cell-free extracts by use of reduced methyl viologen as the electron donor. the enzyme was located in the supernatant fraction after centrifugation of extracts for 2 ... | 1970 | 5429724 |
| spiral-shaped bacteria in the cecal mucosa of the amami spinous country-rat, tokudaia osimensis osimensis. | | 1981 | 7289330 |
| polyphasic taxonomy of the genus vibrio: numerical taxonomy of vibrio cholerae, vibrio parahaemolyticus, and related vibrio species. | a set of 86 bacterial cultures, including 30 strains of vibrio cholerae, 35 strains of v. parahaemolyticus, and 21 representative strains of pseudomonas, spirillum, achromobacter, arthrobacter, and marine vibrio species were tested for a total of 200 characteristics. morphological, physiological, and biochemical characteristics were included in the analysis. overall deoxyribonucleic acid (dna) base compositions and ultrastructure, under the electron microscope, were also examined. the taxonomic ... | 1970 | 5473901 |
| variations in the amount and relative distribution of vitamin b12 and its analogs in the bovine rumen. | | 1971 | 5546184 |
| isolation of a salt tolerant pleomorphic klebsiella strain from a case of diabetic periodontitis. | an unusual klebsiella strain was isolated from a deep periodontal pocket of a diabetic patient. according to its biochemical reactions the new strain differed from klebsiella pneumoniae and other described biotypes. in addition, the new isolate was very salt tolerant; in the presence of 7.5% sodium chloride the bacterium changed into a spirillum-like form, with highly pleomorphic filaments, and reverted immediately to the short rod form at lower sodium chloride concentrations or in the absence o ... | 1980 | 7432188 |
| isolation and characterization of a bacteriophage si 1 for spirillum itersonii. | | 1971 | 5566092 |
| [numerical taxonomy of vibrios and of certain comparable bacteria. i. taxometric method and material used]. | | 1966 | 5970794 |
| isolation and chemical structure of the peptidoglycan of spirillum serpens cell walls. | the peptidoglycan layer of spirillum serpens cell walls was isolated from intact cells after treatment with sodium dodecylsulfate and digestion with pronase. the isolated peptidoglycan contained glucosamine, muramic acid, alanine, glutamic acid, and meso-diaminopimelic acid in the approximate molar ratio of 1:1:2:1:1. aspartic acid and glycine were the only other amino acids found in significant quantities. n-terminal amino acid analyses of the tetrapeptide amino acids in the peptidoglycan revea ... | 1968 | 5636818 |
| isolation and characterization of filterable marine bacteria. | anderson, j. i. w. (northeast shellfish sanitation research center, narragansett, r.i.), and w. p. heffernan. isolation and characterization of filterable marine bacteria. j. bacteriol 90:1713-1718. 1965.-by a process of double filtration of seawater, first through a membrane filter with a pore diameter of 0.45 mu and then through a membrane filter with a pore diameter of 0.22 mu, it was possible to isolate on the surface of the latter membrane a group of marine organisms not usually encountered ... | 1965 | 5854592 |
| anatomical features of vibrio fetus: electron microscopic survey. | | 1966 | 5963508 |
| phylogenetic position of taylorella equigenitalis determined by analysis of amplified 16s ribosomal dna sequences. | the 16s ribosomal dna sequence of taylorella equigenitalis (formerly haemophilus equigenitalis), the causative organism of contagious equine metritis, was determined. a phylogenetic analysis of this sequence revealed a phylogenetic position of t. equigenitalis in the beta subclass of the class proteobacteria apart from the position of haemophilus influenzae, which belongs to the gamma subclass of proteobacteria. a close phylogenetic relationship among t. equigenitalis, alcaligenes xylosoxidans, ... | 1993 | 8347520 |
| inhibitio of flagellar coordination in spirillum volutans. | the motility of spirillum volutans is caused by the rotation of each polar flagellar fascicle in a direction opposite to that of the more slowly rotating cell. both flagella form cones of revolution oriented in the same direction. when the cell reverses its motion, both fascicles simultaneously reverse their rotation and also the orientation of their cones of revolution, with the tail fascicle becoming the head and vice versa. chloral hydrate and phenol were found to cause uncoordination, with b ... | 1967 | 6057800 |
| cytochrome synthesis and its regulation in spirillum itersonii. | spirillum itersonii contains b- and c-type cytochromes as well as a carbon monoxide-binding pigment of the cytochrome o type. synthesis of cytochromes b and c is increased by about two- and fourfold, respectively, when cells are transferred from high to low aeration. the increased concentration of cytochrome is not accompanied by an increase in the respiration rate of the cells. both cytochrome b and cytochrome c are located in the particulate fraction of cells grown under high or low aeration, ... | 1967 | 6057811 |
| effect of dimethylsulfoxide on derepression of nitrogenase in spirillum lipoferum. | | 1981 | 6113164 |
| attachment of diaminopimelic acid to bdelloplast peptidoglycan during intraperiplasmic growth of bdellovibrio bacteriovorus 109j. | an early event in the predatory lifestyle of bdellovibrio bacteriovorus 109j is the attachment of diaminopimelic acid (dap) to the peptidoglycan of its prey. attachment occurs over the first 60 min of the growth cycle and is mediated by an extracellular activity(s) produced by the bdellovibrio. some 40,000 dap residues are incorporated into the escherichia coli bdelloplast wall, amounting to ca. 2 to 3% of the total initial dap content of its prey cells. incorporation of dap occurs when e. coli, ... | 1984 | 6202674 |
| [isolation of atmospheric-nitrogen-fixing spirilla from the waters of the paraná delta and other rivers]. | seventeen strains of spirillum-like organisms (2) were isolated from the parana delta and other rivers (table 1), using the following medium: 0.5% malic acid; 0.4% koh; 0.5% k2hpo4; 0.005% yeast extract; ph was adjusted to 7 with koh and 0.15% agar. the organisms produced a white, dense and sub-superficial pellicle in this medium, and streaking them on plates, single colonies could be isolated. they were easily recognized thanks to the congo red added to the medium, because the bacteria, as it h ... | 1984 | 6400725 |
| [range of the transmissivity of the genetic transfer factors pap38, pap39, pap41 and pap42]. | a study was made of the transmissivity range of the genetic transfer factors pap38, pap39, pap41 and pap42 identified in e. coli. it was demonstrated that these factors are not capable of transfer to the cells of p. putida, p. fluorescens, r. leguminosarum, a. lipoferum, a. tumefaciens. factor pap42 is mobilized to transfer to p. putida and r. leguminosarum with the aid of plasmid rp4. it is assumed that in the course of mobilization, the cointegrative structures are formed between plasmids pap4 ... | 1983 | 6299434 |
| components of the regular surface array of aquaspirillum serpens mw5 and their assembly in vitro. | the two-layered regular surface array of aquaspirillum serpens mw5 was removed from cell envelopes and dissociated into subunits by treatment with 6 m urea. the surface components reassembled onto an outer membrane surface and self-assembled into planar sheets in vitro in the presence of ca2+ or sr2+. the two layers were removed sequentially from cell envelopes by a two-step extraction procedure involving initial treatment with a high-ph buffer to remove the outermost surface layer and subsequen ... | 1984 | 6693353 |
| [differentiation among species of the genus azospirillum]. | to replace the spirillum lipoferum denomination (2) for the nitrogen fixing group of soil spirilla, the azospirillum genus has been created in recent years (12), which includes two species: a. lipoferum and a. brasilense. both of them are nitrogen fixing bacteria able to induce a specific infection of grass roots (1, 6). consequently it is important to differentiate correctly the species when plant-bacteria relationships must be studied or inoculation assays must be carried out. for this reason ... | 1984 | 6400721 |
| i smell a rat! | | 1999 | 10621799 |
| ultrastructural aspects of localized membrane damage in spirillum serpens vhl early in its association with bdellovibrio bacteriovorus 109d. | | 1974 | 4615643 |
| structure of the regular surface layer of aquaspirillum serpens mw5. | the structure of the regular surface layer of aquaspirillum serpens mw5 has been investigated by electon microscopy supplemented by computer image processing and least-squares analysis. the layer has a ribbed appearance, both on the bacterium and in isolated, negatively stained fragments. however, detailed analysis indicated that the layer was composed of two hexagonal sheets having p6mm symmetry and a = 16 nm. one sheet was staggered by one half repeat along a (1,0) line of the p6nm lattice rel ... | 1982 | 7061396 |
| toxicity tests to assess pollutants removal during wastewater treatment and the quality of receiving waters in argentina. | in argentina, legislation to control adverse impacts of effluent discharges and the quality of receiving waters is scant and relies mainly on the physicochemical characteristics of the effluents and receiving waters. objectives of this study were to use standardized acute toxicity tests to assess treatment of petrochemical industry effluents and the toxicity of various treated industrial effluents in the buenos aires metropolitan area and their receiving waters. tests for the first objective use ... | 2001 | 11409193 |
| trailing flagella rotate faster than leading flagella in unipolar cells of spirillum volutans. | in unipolar cells of spirillum volutans, the flagellar rotation frequency is halved, approximately, when the flagellar bundle reorientates to rotate about the cell body and reverse the swimming direction. the viscous drag resulting from a concomitant increase in flagellar wave amplitude is probably responsible for the reduced frequency of flagellar rotation. | 1982 | 7061399 |
| uptake hydrogenase activity in denitrifying azospirillum brasilense grown anaerobically with nitrous oxide or nitrate. | zospirillum brasilense sp7 was grown anaerobically with n2o as the terminal electron acceptor and nh4cl as the nitrogen source. hydrogen uptake activity (o2-dependent h3h oxidation) was expressed in the presence and absence of 5% h2; it reached its maximum in late logarithmic phase as the malate became limiting. this activity was very stable in stationary phase, even in the absence of exogenous h2, compared with microaerobically grown cultures; this supports the hypothesis that the exclusion of ... | 1984 | 6690429 |
| bacterial infection of the common bile duct in chronic fascioliasis in the rat. | bile taken from rats infected with the liver fluke, fasciola hepatica contained spiral bacteria whereas bile from uninfected rats was free from spiral bacteria. the bacterium and its relationship to the bile duct epithelium and the liver fluke was studied with a combination of light microscopy, scanning and transmission electron microscopy. its morphological characteristics suggest that the bacterium belongs to the genus spirillum. in contrast to many other co-infections of bacteria and helminth ... | 1984 | 6736306 |
| [chemotaxis of azospirillum lipoferum and azospirillum brasiliensis. ii. activity of the amino acids contained in gramineae root exudates]. | | 1980 | 7209176 |
| [chemotaxis of azospirillum lipoferum and azospirillum brasiliensis toward gramineae root exudates. i. corn, wheat and sorghum activity]. | | 1980 | 7209175 |
| straight mutants of spirillum volutans can swim. | nonhelical mutant cells of spirillum volutans atcc 19554 can swim as fast as the helical cells. consequently, a helical cell shape is not required for motility of this species, and the function of the polar flagellar fascicles is not merely to cause rotation, and therefore translocation, of the corkscrew-shaped cell. | 1983 | 6826526 |
| spontaneous rat bite fever in non-human primates: a review of two cases. | rat bite fever is a worldwide zoonotic, non-reportable disease. this entity encompasses similar, yet distinct, disease syndromes caused by streptobacillus moniliformis or spirillum minus. naturally occurring rat bite fever has not been previously described in non-human primates. this report describes two cases of non-human primate rat bite fever caused by s. moniliformis; a rhesus macaque (macaca mullata) with valvular endocarditis, and a titi monkey (callicebus sp.) with septic arthritis. poten ... | 2002 | 12519213 |
| rat-bite fever in children: case report and review. | we report 2 cases of rat-bite fever (rbf), a multisystem zoonosis, in children and review the literature. rbf is caused by i of 2 gram-negative organisms: streptobacillus moniliformis or, less commonly, spirillum minus. both of our cases developed in school-aged girls with a history of rat exposure who presented with a multisystem illness consisting of fever, petechial and purpuric rash, arthralgia and polyarthritis. both responded promptly to antibiotic treatment. an additional 10 cases from a ... | 2002 | 12160180 |
| phylogenetic analysis of the genus aquaspirillum based on 16s rrna gene sequences. | phylogenetic analysis of 15 species of the genus aquaspirillum based on 16s rrna gene (rdna) sequences indicated that the genus aquaspirillum is phylogenetically heterogeneous and the species could be divided into four groups as follows: aquaspirillum serpens, the type species of this genus, a. dispar and a. putridiconchylium are situated in the family neisseriaceae; members of the second group, a. gracile, a. delicatum, a. anulus, a. giesbergeri, a. sinuosum, a. metamorphum and a. psychrophilum ... | 2002 | 12113929 |
| phylogenetic relationships of the helical-shaped bacteria in the alpha proteobacteria inferred from 16s rdna sequences. | 16s ribosomal rna gene sequences from seven strains of aquaspirillum peregrinum, aqu. itersonii, aqu. polymorphum, and oceanospirillum pusillum were compared with homologous sequences from other members of helical-shaped bacteria. the bootstrapped neighbor-joining tree, inferred from 887 aligned sites, placed the spirillum taxa assigned to aquaspirillum, oceanospirillum, azospirillum, magnetospirillum, rhodospirillum, and rhodocista of the proteobacteria in seven clusters of alpha proteobacteria ... | 1997 | 12501339 |
| [microspirillum fragae, n. sp., parasité of the burhinus capensis capensis lichtenstein 1823, in mozambique]. | | 1952 | 13008063 |
| some observations on bacterial flagella. | | 1953 | 13035049 |
| a macromolecular mono-layer in the cell wall of spirillum spec. | | 1953 | 13058992 |
| flagellum and motility of spirillum serpens. | | 1953 | 13069434 |
| specific agglutination of spirillum serpens. | | 1953 | 13069435 |
| [bacteriological reexamination of spirillum buccale porter (gins) and spirillum buccale koch (gins)]. | | 1953 | 13150912 |
| some observations on the flagella and blepharoplasts of spirillum and vibrio spp. | | 1954 | 13152344 |
| comparative studies of nitrogen-fixing bacteria associated with grasses in israel with azospirillum brasilense. | free-living, dinitrogen-fixing bacteria associated with roots of grasses were isolated from several locations in israel. bacteria with characteristics similar to those of azospirillum were isolated from cynodon dactylon roots and were compared with azospirillum brasilense from brasil (sp-7) and from california (cd). colonies of the israeli isolates were yellow and consisted of curved rods, 0.5-0.6 micron in diameter with polar flagella, whereas colonies of a. brasilense were pink (sp-7) and red ... | 1980 | 7397611 |
| the forgotten first career of doctor henry van dyke carter. | while henry gray's anatomy: descriptive and surgical, first published in 1858, is distinguished by superb illustrations, its original illustrator is remembered for an entirely different set of accomplishments, notably significant contributions to tropical medicine. | 1995 | 7582216 |
| structure of the regular surface layer of spirillum putridiconchylium. | | 1980 | 7365794 |
| flagella and cell wall of spirilla. | | 1955 | 13243438 |
| [fixation of molecular nitrogen by water spirillum]. | | 1956 | 13321538 |
| nitrite reductase from the magnetotactic bacterium magnetospirillum magnetotacticum. a novel cytochrome cd1 with fe(ii):nitrite oxidoreductase activity. | cytochrome cd1 nitrite reductase was isolated from magnetite-containing cells of the magnetotactic bacterium magnetospirillum (formerly aquaspirillum) magnetotacticum, which was microaerobically cultivated under denitrifying conditions. the enzyme showed absorption maxima at 643 nm and 409 nm in the oxidized form, and at 663, 551, 522, and 418 nm in the reduced form. a distinctive split absorption band did not occur at about 550 nm. the pyridine ferrohemochrome spectra suggested the presence of ... | 1995 | 7588814 |
| microcyst formation and germination in spirillum lunatum. | | 1956 | 13357729 |
| toxicity of organomercury compounds: bioassay results as a basis for risk assessment. | a former mercury plant, where mercury salts and organomercurials for pesticide use were produced, caused soil contamination in high concentrations. typical organomercurial products included ethylmercury, phenylmercury, methoxyethylmercury and ethoxyethylmercury compounds. risk assessment of these sites must be carried out before any major clean-up processes can be planned. a sensitive speciation technique for the various organomercury species in environmental matrices is a prerequisite for toxic ... | 1995 | 7741224 |
| some observations upon the development and mode of attachment of the flagella in vibrio and spirillum species. | | 1956 | 13294134 |
| studies on the isolation of spirillum sputigenum. | | 1957 | 13460815 |
| nuclear fusion in spirillum spp. | | 1957 | 13481311 |
| some observations concerning the presence of spirilla in the fundic glands of dogs and cats. | | 1958 | 13559622 |
| [surface structure & flagella of spirilla]. | | 1958 | 13616590 |
| the gonidial stages in spirillum spp. and vibrio spp. | | 1956 | 13346028 |
| electron microscopy of ultrathin sections of spirillum serpens. | | 1957 | 13405862 |
| a diphtheroid stomatitis of chickens apparently due to a spirillum, spirillum pulli, species nova. | | 1956 | 13362786 |
| an introduction to biomimetics: a structural viewpoint. | biomimetics is a newly emerging interdisciplinary field in materials science and engineering and biology in which lessons learned from biology form the basis for novel technological materials. it involves investigation of both structures and physical functions of biological composites of engineering interest with the goal of designing and synthesizing new and improved materials. this paper discusses microarchitectural aspects of some structural biocomposites, presents microstructural criteria fo ... | 1994 | 8018989 |
| observations on spirillum sputigenum and its relationship to selenomonas species with special reference to flagellation. | | 1959 | 13654218 |
| cellular structure of large spirilla. | | 1960 | 13801028 |
| occurrence of spiral-shaped bacteria in gastric biopsies of dogs and cats. | | 1993 | 8362485 |
| identity of the so-called vibrios of the oral flora. | | 1959 | 13654235 |
| prevention of borrelia duttonii, trypanosoma gambiense, spirillum minus and treponema pallidum infections conveyable through transfusion. | | 1958 | 13653844 |
| purification and properties of a 'cytochrome a1'-like hemoprotein from a magnetotactic bacterium, aquaspirillum magnetotacticum. | a novel hemoprotein was purified from a magnetotactic bacterium, aquaspirillum magnetotacticum ms-1. the protein showed absorption peaks at 437 nm in the oxidized form, and 592, 550 and 450 nm in the reduced form. although the spectral properties of the hemoprotein were very similar to those of 'cytochrome a1', the hemoprotein contained no molecules of heme a. the protein contained two kinds of hemes; one was extracted with hcl-acetone and the other was covalently bound to the protein. the pyrid ... | 1993 | 8251522 |
| cell elongation and division in spirillum anulus. | | 1959 | 13844899 |
| chromatin patterns in spirillum anulus. | | 1959 | 13844900 |
| extracellular accumulation of pyrroles in bacterial cultures. | aerobacter aerogenes, paracolobactrum aerogenoides, spirillum serpens, and gelatinous strains of chromobacterium violaceum produced an extracellular, ether-soluble, ehrlich-positive substance when grown in media prepared with gelatin hydrolysate. the substance has been tentatively identified as pyrrole-2-carboxylic acid. both hydroxy-l-proline and allo-d-hydroxyproline have been shown to be precursors of the material. gelatinous strains of chromobacterium violaceum, but not the other positive cu ... | 1963 | 14023126 |
| [bacterial growth at low substrate concentration]. | | 1963 | 14028703 |
| electron microscopic and bacteriologic studies of spirilla isolated from the fundic stomachs of cats and dogs. | | 1962 | 14005438 |
| [bacterial growth at low substrate concentration]. | | 1963 | 13957378 |
| membrane stability and salt tolerance in gram-negative bacteria. | | 1963 | 14076708 |
| [displacement of bacterial "spores": in spirillum praeclarum and during their liberation]. | | 1963 | 14102049 |
| evaluation and simplification of the assimilable organic carbon nutrient bioassay for bacterial growth in drinking water. | a modified assimilable organic carbon (aoc) bioassay is proposed. we evaluated all aspects of the aoc bioassay technique, including inoculum, incubation water, bioassay vessel, and enumeration technique. other concerns included eliminating the need to prepare organic carbon-free glassware and minimizing the risks of bacterial and organic carbon contamination. borosilicate vials (40 ml) with teflon-lined silicone septa are acceptable incubation vessels. precleaned vials are commercially available ... | 1993 | 8517748 |
| a method for the purification of bacterial flagella by ion exchange chromatography. | | 1963 | 14072828 |
| microbial ecology of activated sludge. i. dominant bacteria. | over 300 bacterial strains were isolated from seven samples of activated sludge by plating on sewage agar. gram-negative bacteria of the genera zoogloea and comamonas predominated. many isolates (51%) showed sudanophilic inclusions of poly-beta-hydroxybutyric acid, whereas 34% accumulated iodophilic material on media containing starch. a large number required either vitamins or amino acids, or both, for growth. none of the isolates tested for their ability to bring about changes in autoclaved se ... | 1964 | 14215970 |