TitleAbstractYear(sorted descending)
hepatic drug-metabolizing enzyme system and endotoxin tolerance: structural requirement of lps in induction of an early tolerance.the alteration of hepatic drug-metabolizing enzyme activities in mice given salmonella endotoxin by single or multiple intraperitoneal injections was investigated. an essentially the same biphasic, early and late phase, endotoxin tolerance was observed in the animals receiving a single injection of endotoxin or repetitive daily injections. the results of reciprocal cross tolerance tests using lipopolysaccharide and free lipid a preparations derived from salmonella minnesota, salmonella typhimuri ...19846521669
[growth rate of antibiotic-producing gram-negative bacteria on liquid nutrient media].glycerol-yeast medium no. 3 may be used as a seed medium in screening of antibiotic-producing strains among acetobacter, gluconobacter, chromobacterium, agrobacterium, and other genera. the medium is transparent. it provides visual instrumental control of the growth rate of the seed material and estimation of biomass augmentation. the period of the exponential phase growth of the strains tested on medium no. 3 was 2-8 hours. when no growth on medium no. 3 is observed media nos. 1 and 2 can be us ...19846524878
human infection due to chromobacterium violaceum: a report from ilorin, nigeria. 19846535708
heterotrophic nitrification among denitrifiers.twelve denitrifying bacteria representing six genera were tested for an ability to nitrify pyruvic oxime heterotrophically. six of these bacteria exhibited appreciable nitrification activity, yielding as much as 5.8 mm nitrite and little or no nitrate when grown in a mineral salts medium containing 7 mm pyruvic oxime and 0.05% yeast extract. of the six active bacteria, four (pseudomonas denitrificans, pseudomonas aeruginosa, and two strains of pseudomonas fluorescens) could grow on yeast extract ...19846721486
chromobacterium violaceum infection of the eye. a report of two cases.we report what we believe to be the first two known cases of chromobacterium violaceum infection of the eye. one patient had conjunctivitis as the initial manifestation of an ultimately fatal infection. in the second patient, who suffered from chronic granulomatous disease of childhood, orbital cellulitis developed as part of a disseminated c violaceum infection from which he subsequently recovered. infections caused by c violaceum may involve the eye and orbit. these infections are frequently f ...19846721759
the effects of the insecticide acephate on the growth and nutrient uptake of an aquatic bacterium.the effects of high (1000 ppm) and low (1 ppm) concentrations of acephate on the rate of growth and nutrient uptake by an aquatic bacterium (identified as chromobacterium lividum ) were investigated. this insecticide increased doubling time, decreased maximum cellular yield, and reduced cell size when c. lividum was grown in the presence of high acephate concentrations. total [14c]glucose and 14c-labeled amino acids uptake rates were reduced by the high acephate concentration. the high acephate ...19846722663
biosynthetic studies of arphamenines a and b.the biosynthetic pathways of arphamenines a and b were studied. arphamenine a was derived from acetic acid, l-arginine and l-phenylalanine, and arphamenine b from acetic acid, l-arginine and l-tyrosine.19846735925
chromobacterium violaceum septicaemia in a dog. 19836314965
chromobacterium violaceum infectious and chronic granulomatous disease. 19836824267
a new antibiotic, 3,6-dihydroxyindoxazene. 19836853374
effect of bestatin analogues and other compounds on enkephalin hydrolysis by an aminopeptidase from the mesophiles pseudomonas sp atcc 11299a and chromobacterium violaceum atcc our studies on newly synthesized compounds for their potential analgesic effect, we decided for purposes of convenience and economy to investigate non-mammalian sources for the presence of enkephalin degrading enzymes. an aminopeptidase that catalyzes the hydrolysis of the tyrosylglycyl bond of leucine- and methionine enkephalin was purified from the mesophiles pseudomonas sp atcc 11299a (ps) and chromobacterium violaceum atcc 12540 (cv). each preparation also hydrolyzed to varying extents ne ...19836856949
sulfur metabolism in the biosynthesis of monobactams.we studied the biosynthesis of monobactams with respect to sulfur metabolism in chromobacterium violaceum, acetobacter sp., and agrobacterium radiobacter. all three organisms used inorganic sulfur for monobactam production. when sulfur-containing amino acids were assayed as a source of sulfur for monobactam production, c. violaceum used cystine but not cysteine or methionine, acetobacter sp. used all three compounds, and a. radiobacter used none. 35s from cysteine, methionine, and sodium sulfate ...19836859838
a probable case of chromobacterium violaceum infection in australia.a case of a north-queensland aboriginal child, who died of a septicaemic illness probably caused by chromobacterium violaceum, is reported. this organism is a gram-negative bacillus found in soil and water. human and animal infections are very rare, but have been reported from various tropical and subtropical areas of the world. most of these have been fatal, although survival after recognition, appropriate antibiotic therapy, and surgical intervention has also been reported.19836865828
a new antibiotic y-t0678h produced by a chromobacterium species. 19836615590
microbial growth associated with granular activated carbon in a pilot water treatment facility.the microbial dynamics associated with granular activated carbon (gac) in a pilot water treatment plant were investigated over a period of 16 months. microbial populations were monitored in the influent and effluent waters and on the gac particles by means of total plate counts and atp assays. microbial populations between the influent and effluent waters of the gac columns generally increased, indicating microbial growth. the dominant genera of microorganisms isolated from interstitial waters a ...19836625567
arphamenines a and b, new inhibitors of aminopeptidase b, produced by bacteria. 19836654760
isolation and identification of ropy bacteria in raw milk.approximately 4.2% of 4,000 maryland-virginia raw milk tanker samples developed ropiness when incubated at 10 degrees c. of the 56 bacterial isolates 30 were identified by species. klebsiella oxytoca and pseudomonas aeruginosa were isolated most frequently. other ropy isolates were identified as pseudomonas spp., chromobacterium, flavobacterium multivorum, presumptive yersinia pestis, enterobacter agglomerans, klebsiella pneumoniae, and pasteurella-actinobacter spp. six of the klebsiella oxytoca ...19836685140
[qualitative and quantitative determination of bacterial populations in aquatic habitats. 5. comparison of 2 rapid sand filters].the bacterial examinations of raw water and the effluent of two rapid sand filters showed differences with respect to the colony count, the identified species and the activity of the isolated bacteria. the raw waters of the treatment plants si and me are originated from an oligotrophic artificial lake and from ground-water respectively. the two raw waters contained only low numbers of bacteria, whereas the effluents of the filters showed a considerable increase of the bacterial counts. the resul ...19836367299
chromobacterium violaceum septicemia in new jersey. 19826953253
sq 26,180, a novel monobactam. i taxonomy, fermentation and biological properties.strains of chromobacterium violaceum, isolated from various environments, were found to produce a novel monocyclic beta-lactam antibiotic. the antibiotic, sq 26,180 was weakly active against gram-positive and gram-negative bacteria with the exception of mutants hypersensitive to beta-lactam antibiotics. the compound was highly stable to beta-lactamases and acted as an inhibitor of the p99 enzyme from enterobacter cloacae. sq 26,180 showed affinity for penicillin-binding proteins 1a, 4 and 5/6 of ...19826978877
dna:rrna hybridization studies of chromobacterium fluviatile.hybrids were prepared between 14c-labelled rrna from each of nine species of gram-negative bacteria and the dna of chromobacterium fluviatile. two parameters were determined for each hybrid - the t m(e), which is the temperature at which 50% of the hybrid was denatured, and the percentage of rrna bound under defined stringent conditions. the former gives a measure of the stability of the duplex once formed and the latter probability reflects the amount of the genome involved in the coding of rrn ...19826181184
the effect of some varying lipid a structures on the inhibition of fibrillogenesis in basement membrane collagen.acid soluble basement membrane collagen (abmc) was prepared by extraction of the anterior lens capsules from bovine calf eyes in 0.5 m acetic acid in the presence of the protease inhibitors leupeptin and pepstatin. thermal aggregates formed from soluble basement membrane collagen were facilitated by heating (28 degree c) the collagen solutions in 0.15 m phosphate buffer. the effects of endotoxins derived from salmonella minnesota r595, chromobacterium violaceum an rhodopseudomonas viridis on the ...19826801242
biosynthesis of monobactam compounds: origin of the carbon atoms in the beta-lactam ring.the biosynthesis of monobactams by strains of chromobacterium violaceum, acetobacter sp., and agrobacterium radiobacter was studied. monobactams were produced during logarithmic growth by c. violaceum and acetobacter sp. and during late log growth on glycerol and in stationary phase by a. radiobacter. the addition of various amino acids failed to significantly stimulate monobactam production in any of the producing organisms. several 14c-amino acids and pyruvate were incorporated in vivo into mo ...19826805424
sq 26,180, a novel monobactam. ii isolation, structure determination and synthesis. 19827076565
chronic granulomatous disease of childhood and chromobacterium violaceum infections in the southeastern united states.patients with chronic granulomatous disease are predisposed to infections by catalase-positive organisms in the environment. chromobacterium violaceum is a catalase-positive bacterium whose saprophytic source in this country is the subtropical soil and water of the southeastern united states. two patients with chronic granulomatous disease, followed at the national institutes of health in maryland, acquired c. violaceum infections in florida. all 10 cases previously reported were acquired in flo ...19827092006
complete hematologic and hepatic recovery in a patient with chloramphenicol hepatitis-pancytopenia syndrome. 19827143157
isolation of chromobacterium spp. from foods, soil, and water.chromobacterium violaceum, a soil and water inhabitant, has been implicated in human disease with a high mortality rate, particularly in the southeastern united states. the psychrotrophic chromobacterium lividum has been isolated from foods, water, and soil, but is not considered pathogenic. to determine the distribution of chromobacterium spp. in soil, water, and foods in the gainesville area, we evaluated bennett, ryalls and moss, and aeromonas membrane agars for their ability to recover these ...19827159087
distribution of beta-lactam and beta-lactone producing bacteria in nature.over one million bacteria were isolated from a large variety of soil, plant and water samples collected from different environments and examined in an extremely sensitive and highly specific screen for beta-lactam production. a group of seven related monocyclic beta-lactams (monobactams) were isolated from strains representing four genera-agrobacterium, chromobacterium, gluconobacter and pseudomonas. monobactam-producing strains of agrobacterium and pseudomonas were isolated only rarely. produci ...19827174535
the similarities between pseudomonas paucimobilis and allied bacteria derived from analysis of deoxyribonucleic acids and electrophoretic protein patterns.the chromosomal dna was isolated and purified from 17 strains of pseudomonas paucimobilis, and from the type or reference strains of flavobacterium capsulatum, f. devorans, f. multivorum, 'chromobacterium lividum', xanthomonas campestris and seven species of pseudomonas. the dna base compositions (mol% g + c) of p. paucimobilis strains were between 62.2 and 68.6%, and typical strains had a mean value of 65.3 +/- 0.4 mol%, determined from thermal denaturation temperature. dna-dna molecular hybrid ...19827183747
diversity dynamics of marine bacteria studied by immunofluorescent staining on membrane filters.of 34 strains of marine bacteria isolated on a general seawater medium, 5 were selected for detailed studies of their population dynamics in the plankton. the isolates were characterized as aeromonas sp., chromobacterium cf. lividum, vibrio sp., and two pseudomonas spp. specific antibodies were produced by immunization of rabbits, and bacterial cells were stained on black uni-pore membrane filters by an indirect immunofluorescent staining procedure. the method proved to be very specific and prac ...198216345920
monobactams: isolation and structure determination. 19817199043
influence of methylheptenone and related phytoplankton norcarotenoids on heterotrophic aquatic bacteria.certain norcarotenoids, which have recently been found as excretion products of freshwater cyanobacteria and algae, are potent inhibitors of different metabolic functions in heterotrophic bacteria. 6-methylhept-5-en-2-one showed the strongest effects and acted as a noncompetitive inhibitor of both glucose uptake and respiration by aquatic isolates of chromobacterium lividum and arthrobacter sp. inhibition of the heterotrophic potential of glucose uptake by 6-methylhept-5-en-2-one was characteriz ...19817214229
attempts at induction of phenylalanine hydroxylase in thermophilic bacteria and induction of thermophily in mesophiles.some moderate and extreme thermophilic bacteria grew well on media other than the recommended basic media. attempts to induce phenylalanine hydroxylase (phe h) in the various thermophiles as well as mild thermophily in the mesophiles pseudomonas sp atcc 11299a and chromobacterium violaceum atcc 12540 were unsuccessful. evidence is presented indicating that the enzyme in the latter two organisms may be membrane bound. the level of phe h activity induced was not always consistent with the level of ...19817244367
chromobacterium violaceum presenting as a surgical emergency. 19817280766
fulminating chromobacterial septicaemia presenting as respiratory distress syndrome. 19817314030
chromobacteriosis rare, but early diagnosis vital. 19817463651
chromobacteriosis--florida. 19816789054
microbiological quality of selected recreational waters. 19816797820
[lipases of gram-negative bacteria: a review].the review surveys current concepts concerning properties of lipases from gram-negative bacteria. it discusses the effects of cultivation conditions (composition, temperature and ph of the medium) of bacteria-producers on the biosynthesis of lipases.19817017672
numerical taxonomy analysis of bacteria isolated from the completed 'most probable numbers' test for coliform bacilli. 19817024232
the laboratory diagnosis of opportunistic infections caused by uncommon bacteria in papua new guinea.flavobacterium meningosepticum, chromobacterium violaceum and listeria monocytogenes are opportunistic pathogens of man and are occasional but important causes of infections in neonates, infants and adults in papua new guinea. mortality is high. flavobacterium meningosepticum should be suspected when a weak indole producing oxidase positive gram-negative bacillus producing a discrete yellow non-diffusing pigment at room temperature and showing a resistant antibiotic sensitivity pattern is isolat ...19816951339
monobactams-antibiotics from the marshes. 19816116095
septicemia and death caused by chromobacterium violaceum. 19807403928
chromobacterium violaceum infections. report of a fatal case.a case of systemic chromobacterium violaceum infection, believed to be the first reported in a papua new guinean, is described. autopsy disclosed multiple liver abscesses and the diagnosis was made by recovery of the organism from one of the abscesses. aspects of management of this uncommon infection are discussed.1979299336
phenylalanine hydroxylase from chromobacterium violaceum. purification and characterization.phenylalanine hydroxylase was purified approximately 3000-fold to apparent homogeneity with a 13% yield and crystalized from l-phenylalanine-induced cells of chromobacterium violaceum. the enzyme was shown to be composed of a single polypeptide chain with an estimated molecular weight of approximately 32,000. some of the physical properties of the enzyme include: a stokes radius of 26.0 a, a sedimentation coefficient of 2.71 s, a diffusion coefficient of 8.20 x 10(-7) cm2/s, a frictional ratio o ...197933985
microbiology problem: chromobacterium violaceum infection. 1979386795
[combination of 5-fluorocytosine and amphotericin b in the treatment of chromomycosis].the authors discuss the problem of resistance of chromomycosis to 5-fluorocytosine (5-fc), observed in a previous study in 7 patients initially treated with the drug and subsequently treated with 5-fc associated with other medicaments. all the associations, including that with amphotericin b, failed to overcome resistance. experiments in mice and "in vitro" show a synergism between 5-fc and amphotericin b against "c. albicans", "c. neoformans" and "fonsecaeae pedrosoi" already confirmed in huma ...1979398931
fatal infection by chromobacterium violaceum--clinical and bacteriological study. 1979457214
osteomyelitis associated with chromobacterium violaceum sepsis. a case report. 1979479248
stimulation of chromobacterium lipase activity and prevention of its adsorption to palmitoyl cellulose by hydrophobic binding of fatty acids.fatty acids prevented adsorption of purified chromobacterium lipase [triacylglycerol acylhydrolase, ec] onto palmitoyl cellulose (pal-c) and also increased the activity of the purified lipase. these effects increased with increase in the concentration and chainlength (up to 16 carbon atoms) of the fatty acids, and long-chain unsaturated fatty acids, such as oleic acid, linoleic acid and erucic acid, were most effective. when the lipase was adsorbed (immobilized) on pal-c, its activity wa ...1978659403
studies on the production of extracellular proteinases by a non-pigmented strain of chromobacterium lividum isolated from abattoir effluent. 197829882
[infections due to chromobacterium, serratia, erwinia and flavobacterium (the so-called chromobacterioses)]. 1978361381
[biochemical tests and nutritional requirements of chromobacterium violaceum]. 1977279056
study of the nature of the associated microflora in the prolonged substrateless cultivation of beet plants.the purpose of the present investigation was to study variations in the population density of microorganisms, their qualitative and quantitative composition during substrate-free cultivation of beats. the results obtained show that the microbial number in the nutrient solution increased by the time of intensive growth of beats and decreased by the time of harvesting. the number of root microorganisms was much greater than the total number of microorganisms in the nutrient solution. oligonitrophi ...197717774
purification of lipase from chromobacterium viscosum by chromatography on palmitoyl cellulose.palmitoyl cellulose was used to adsorb the extracellular lipase triacylglycerol acyl-hydrolase ec of chromobacterium viscosum from crude enzyme solution, and the adsorbed enzyme was eluted with a suitable detergent, such as adekatol 45-s-8 or triton x-100. the enzyme was then purified by chromatography on a palmitoylated gauze column with an overall recovery of 71% and an increase in the specific activity of 11-fold from the supernatant fluid of bacterial cultures. further purification p ...197719442
antibodies to bacterial l-asparaginases.complement fixation has been shown to occur when asparaginase reacts with specific antibody. this is as a result of an antigenic determinant common to the four bacterial asparaginases. patients on asparaginase therapy may produce antibodies and these could be demonstrated by complement fixation.197775527
the chemical structure of the lipid a component of lipopolysaccharides from chromobacterium violaceum nctc 9694.the chemical structure of the lipid a component of lipopolysaccharides from chromobacterium violaceum nctc9694 was studied. sequential treatment of lipopolysaccharide with alkali, acid, sodium borohydride and hydrazine allowed the isolation of a reduced glucosamine disaccharide. according to methylation studies and enzymic analysis with beta-n-acetylglucosaminidase the d-glucosamine residues are beta(1 leads to 6) linked. the disaccharide carries two phosphate groups, one being linked glycosidic ...1977862618
pathogenicity of nonpigmented cultures of chromobacterium violaceum.nonpigmented cultures of chromobacterium violaceum have been found to be similar to pigmented cultures in their virulence for mice and the pathology of their infections. clinicians and microbiologists should be prepared to consider nonpigmented c. violaceum in their differential diagnoses of infections caused by gram-negative bacteria. the laboratorian who is not aware of this possibility is likely to erroneously identify nonpigmented strains of c. violaceum as members of closely associated gene ...1977874071
group ve-2 (chromobacterium typhiflavum) ve-2 (chromobacterium typhiflavum) bacteremia occurred in a severely traumatized, post-neurosurgical patient. a discussion of the clinical occurrence of the organism, bacteriological characteristics, and antibiotic sensitivities is presented.1977914996
studies on the lipase of chromobacterium viscosum. v. physical and chemical properties of the lipases. 1977922980
antibacterial activity of marine violet-pigmented alteromonas with special reference to the production of brominated compounds.the synthesis of several types of antibiotics was investigated in four strains of violet-pigmented bacteria belonging to the species alteromonas luteo-violaceus. two of the strains simultaneously produce an antibiotic polyanionic polysaccharide, weakly bound to the cells and diffusing throughout the medium, and two intracellular brominated bactericidal substances. the third strain only synthesizes the polyanionic antibiotic. the fourth one is totally inactive. the macromolecular antibiotic, prob ...1976974909
studies on the mechanism of lipase reaction. iv. action of the lipase from chromobacterium on monomeric p-titrophenyl acetate. 1976975437
beta-lactamase activity in chromobacterium violaceum.a strain of chromobacterium violaceum isolated from a fatally infected patient was found to produce a beta-lactamase. when the organism was grown in drug-free medium, beta-lactamase activity was barely detectable, but when it was grown in the presence of penicillin g, a much larger amount of activity was produced. the beta lactamase was active primarily against cephalosporins; it was sensitive to inhibition by cloxacillin but resistant to p-chloromercuribenzoate. thus this enzyme closely resembl ...1976977998
effective method for activity assay of lipase from chromobacterium viscosum.a method was devised for activity assay of the lipase [triacylglycerol acyl-hydrolase, ec] excreted from chromobacterium viscosum into the culture medium; olive oil emulsified with the aid of adekatol 45-s-8 (a non-ionic detergent, the ethoxylate of linear sec-alcohols having chain lengths of 10--16 carbon atoms) was used as the substrate. this method was specifically effective for chromobacterium lipase acitvity assay, and was approximately twice as sensitive as the conventional method, ...19761002673
[microbiological studies of the wanda lake (antarctica)].the deep-water (68 m) wanda lake in the antarctica is noticeable by three characteristics: a relatively high temperature in the bottom layer, elevated salinity, and the presence of h2s. only several (less often, dozens) saprophytic microorganisms per 40 ml of water are encountered in the lake. the total number of bacteria varies from 6-10(3) to 172-10(3) cells/ml. the highest content of the total bacterial population, and saprophytes, is found in intermediate layers, 30 and 40-50 m deep, respect ...19761012048
studies on the mechanism of lipase reaction. iii adsorption of chromobacterium lipase of hydrophobic glass beads. 19765197
purification and properties of the extracellular metallo-proteinases of chromobacterium lividum (ncib 10926).four extracellular proteolytic enzymes (i-iv) (ec 3.4.22.-) were identified in static cultures of chromobacterium lividum (ncib 10926) by agar gel electrophoresis and isoelectric focusing. proteinases i-iii were freed of non-enzymic protein by chromatography on teae-cellulose and cm-cellulose. the enzyme mixture was then fractionated in a ph gradient by isoelectric focusing. all three enzymes were shown to be heat-labile metallo-enzymes. optimal activity occurred at ph 5.6 for enzyme i and at ph ...19769995
less frequently reported gram-negative fermentative rods.the clinical significance and distinguishing characteristics of less frequently reported gram-negative fermentative rods (pasteurella, yersinia, vibrio, aeromonas and plesiomonas, enterobacter agglomerans, and chromobacterium) are described. increased awareness of these organisms, a knowledge of possible sites in which they cause infection, and identification criteria which will separate them from similar bacteria will prepare the clinical microbiologist for the isolation and identification of t ...1976769548
one-tube oxidation-fermentation methods: limitations posed by atypical fermentative reactions.atypical fermentation in the two-tube method of hugh and leifson (1953), whereby acid was produced in the sealed tube but not in the open tube, was determined to be the result of a preferential metabolism of peptone over the reactant carbohydrate. these atypical fermentations are only partially detected by one-tube oxidation-fermentation methods, and as such they constitute a source of limitation to the routine use of these abbreviated techniques for oxidative-fermentation determinations.1976776087
[formation of l-asparagine and l-glutamine deamidases by bacterial cultures].among studied 40 bacterial cultures, 17 strains catalysed hydroxylaminolysis of i.-asparagine and l-glutamine, and among these cultures seven strains belonged to the pseudomonas genus. extracts of the cells of ps. boreopolis 526 (mgu), ps. aurantiaca ibfm b-14, and ps. septica ibfm b-40 had the maximum deamidase activity during the stage of decelerated growth. the activity of l-asparaginase 2 was practically the same upon various ways of disintegration of the cells of ps. aurantiaca ibfm b-14: b ...1976781474
discrimination of rhizobium japonicum, rhizobium lupini, rhizobium trifolii, rhizobium leguminosarum and of bacteroids by uptake of 2-ketoglutaric acid, glutamic acid and phosphate.rhizobium strains (one each of rh. japonicum, rh. lupini, rh. leguminosarum) take up 2-ketoglutaric acid in general much faster and from lower concentrations in the medium than strains of escherichia coli, bacillus subtilis and chromobacterium violaceum. a strain of enterobacter aerogenes, however, is more similar to some rhizobium strains. the same strains of rhizobium take up also phosphate much faster and from lower concentrations than the other bacteria tested. 4 strains of rh. lupini proved ...1976818969
chromobacterium violaceum infection in a nonhuman primate (macaca assamensis).chromobacteriosis caused by chromobacterium violaceum was diagnosed as an assam macaque, macaca assamensis, that died 4 days after receipt of the yerkes primate center, it was received from a primate facility in florida where it has been housed with a group of rhesus monkeys for 5 years. the animal died suddenly without showing any signs of clinical illness. necropsy findings included extensive hepatic necrosis with the formation of multiple large cavitary lesions. foci of necrosis were also fou ...1976824500
immunological relationships of bacterial l-asparaginases.rabbit antisera against l-asparaginase preparations from escherichia coli, erwinia carotovora, citrobacter sp. and chromobacterium violaceum showed on immunoelectrophoresis that only the enzymes from e. coli and citrobacter are immunologically related. purified preparations had to be used to determine the immunological cross-reactions. immunoelectrophoresis at different ph values yielded the zero mobility points of the enzymes. the activity of the er. carotovora preparation was enhanced up to fo ...197654404
unusual chromobacterium violaceum: aerogenic strains.this is the first report of chromobacterium violaceum strains that are aerogenic. two pigmented strains of c. violaceum and their nonpigmented variants produced gas in glucose broth. kliger iron agar, and triple sugar iron agar. they were similar morphologically and biochemically to other anaerogenic strains studied previously.19761254704
morphological, physiological, and biochemical characteristics of some violet-pigmented bacteria isolated from seawater.sixteen violet-pigmented heterotrophic bacilli were isolated from mediterranean coastal waters. morphological and physiological studies showed that they have a number of characteristics specific to the genus chromobacterium. however, the absence of catalase, the presence of oxidase, and, more especially, the low percentage of bases guanine and cytosine in their dna exclude them from the genus. the specificity of some characters assigned to chromobacterium can thus be discussed. several features ...19761260521
formation of indole-3-carboxylic acid by chromobacterium violaceum.l-tryptophan is converted to indole-3-carboxylic acid by growing cultures and resting cell suspensions of chromobacterium violaceum19761262308
absolute configuration of 3-hydroxy fatty acids present in lipopolysaccharides from various bacterial groups.the absolute configuration of 3-hydroxy fatty acids has been studied, which are present in the lipopolysaccharides of the following bacteria: phodopseudomonas gelatinosa, rh. viridis, rhodospirillum tenue, chromobacterium violaceum, pseudomonas aeruginosa, bordetella pertussis, vibrio metchnikovii, vibrio cholerae, salmonella spp., escherichia coli, shigella flexneri, proteus mirabilis, yersinia enterocolitica and fusobacterium nucleatum. the 3-hydroxy acids were liberated by strong alkaline hyd ...19761278168
the respiratory system of chromobacterium violaceum grown under conditions of high and low cyanide evolution.the particulate fraction of disrupted chromobacterium violaceum grown under cyanide-evolving conditions was unable to oxidize ascorbate plus n,n,n',n'-tetra-methyl-p-phenylenediamine (tmpd), but oxidized nadh and succinate by a linear respiratory pathway which was very resistant to inhibition by cyanide. when the bacteria were grown under conditions where little cyanide evolution occurred, particulate fractions developed the ability to oxidize ascorbate-tmpd by a pathway highly sensitive to cyan ...1975172598
hydroxylation of tryptophan and its control in brain. 1975241047
adsorption and selection of rhizobia with ion-exchange papers.ion exchange papers were used to study the adsorption of 32p-labelled rhizobia on defined surfaces. two strains of rhizobium japonicum and one each of r. leguminosarum and r. lupini were compared with escherichia coli and bacillus subtilis. the ratio of adsorption to strong and to weak acid papers/strong and weak basic papers was consistantly higher for all rhizobial strains compared to the other bacteria. the process of desorption by increasing the ion-concentration causes about 35% desorption ...1975242293
improvements of the membrane filter method for dna:rrna hybridization.we describe and recommend the following improvements of dna:rrna membrane filter hybridization methods. one of our aims was to avoid dna release from filter discs during hybridization. 1. our hybridization conditions are 2 ssc in aq. dest., with 20% formamide, 50 c, overnight for 16 hr. 2. duplexing is over in 8-10 hr. 3. formamide has to be very pure (o.d. less than or equal to 0.2/cm light path at 270 nm). 4. rnaase treatment: 250 mug/5 ml 2 ssc/filter at 37 c for 1 hr. 5. our conditions for s ...19751082296
a mixed bacterial population in a continuous culture with and without kaolinite.chromobacterium lividum and a pseudomonas sp. were grown in pure and mixed continuous culture with and without the clay-mineral, kaolinite. irrespective of the growth conditions, c. lividum adhered to the wall of the culture vessel whereas the pseudomonas sp. showed no such tendency, at least visually. during mixed culture studies, the organism which was initially established in the culture dominated. the ratio between c. lividum and the pseudomonas sp. was about 20:1 when c. lividum was first e ...19751089463
effect of chlorpromazine on the respiration and hexose monophosphate dehydrogenases of gram-negative bacteria.the drug chlorpromazine inhibits respiration in several gram-negative bacteria. the enzymes glucose-6-phosphogluconate dehydrogenase and 6-phosphogluconate dehydrogenase from these microorganisms are not affected by the drug.19751090352
a maximal predictive classification of klebsielleae and of the yeasts.the concepts of the numerical method of maximal predictive classification are illustrated with classifications of 13 species of enterobacteria and of 434 species of yeast. the method seeks to classify into a specified number of classes (k) such that more correct statements can be made about the constituent members than with any other classification. the best choice of k relates to the separation of the classes as measured by the average number of correct statements made for an individual assigne ...19751113078
selective media for the enumeration of chromobacterium spp. in soil and water. 19751116981
metabolism of n-carbobenzoxyl-l-tryptophan by chromobacterium violaceum.chromobacterium violaceum (atcc 12472) metabolizes n-carbobenzoxyl-l-tryptophan into its 2', 3'-dehydro-derivative, and indole-3-propionic acid into indole-3-acrylic acid. the biotransformation accurs in resting cell incubations, and in growing cultures of the bacterium. tryptophan in fermentation media enhances the ability of chromobacterium violaceum to perform the conversion by an undetermined mechanism. the amino acid also prevents stored cultures from losing the ability to accomplish the ...19751125258
taxonomic position and seasonal variations in marine neritic environment of some gram-negative antibiotic-producing bacteria.six marine bacteria which synthesize macromolecular antibiotics were isolated from neritic waters on the french mediterranean coast, and their frequency recorded over two successive years. they appeared in relatively large numbers during the period august to december, and can be identified as marine pseudomonads; however, the low guaninecytosine ratio of their dna, lack of catalase and specific self-inhibition are not compatible with the characteristics of the genus pseudomonas. two produced vi ...19751141855
letter: carbohydrate fermentation, kia, and tsi agar reactions of chromobacterium violaceum. 19751163494
isolation and identification of a genus, chromobacterium, not previously found on processed organism identified as chromobacterium lividum was isolated from processed poultry in georgia.19751171656
studies on the mechanism of the lipase reaction. ii. comparative studies on the adsorption of lipases and various proteins at the air-water interface.adsorption of lipases (ec and various proteins at the air-water interface has been investigated in relation to the mechanism of lipase reaction. aqueous solutions of lipases and denaturated proteins show surface activity as strong as that of synthetic detergents. however, ths surface activity of esterases and various other proteins is little or none. by foam fractionation it was shown that lipases were adsorbed at the air-water interface and the adsorption followed the equation of langm ...19751171698
characteristics of yellow-pigmented nonfermentative bacilli (groups ve-1 and ve-2) encountered in clinical bacteriology.the morphological and physiological characteristics of 20 strains of motile, gram-negative, yellow-pigmented oxidative bacilli (groups ve-1 and ve-2) isolated in clinical bacteriology are described. electron micrographs demonstrate the polar multitrichous flagella of group ve-1 and polar monotrichous flagella of group ve-2. data obtained from guanine plus cytosine ratio studies of 56.8% for ve-1 and 68.9% for ve-2 distinguish the two groups of bacteria.19751176609
studies on the mechanism of lipase reaction. i. inhibition of lipase activity by emulsion of organic solvents. 19751182871
studies on the lipase of chromobacterium viscosum. iv. substrate specificity of a low molecular weight lipase. 19751182872
identification of chromobacterium violaceum: pigmented and non-pigmented strains.the classification and, therefore, identification of chromobacterium violaceum has been based upon its ability to produce a violet pigment. although the organism may yield non-pigmented variants when subcultured on artificial media, the isolation of non-pigmented strains from pathological tissues or from nature had not been reported. with a method established for the identification of c. violaceum regardless of violet pigmentation, non-pigmented strains were isolated from nature. the presence of ...19751236933
studies on the lipase of chromobacterium viscosum. 3. purification of a low molecular weight lipase and its enzymatic properties. 19744208235
[dissolution of gold by microorganisms and the products of their metabolism]. 19744210177
carriage of potentially pathogenic bacteria in the hair. 19744212981
the tryptophan hydroxylase of chromobacterium violaceum. 19744279915
detection of a vibrio sp. by the bacteriophagous nematode pelodera chitwoodi. 19744418570
successful treatment of systemic chromobacterium violaceum infection. 19744479291
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