Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| [bacteria of current interest. 4. new infections caused by known bacteria-- beta group streptococcus, haemophilus influenzae, aeromonas and bacillus infections]. | 1979 | 110966 | |
| infectious diarrhea. | 1979 | 111270 | |
| [pathogenicity of aerobically sporulating microorganisms: bacillus cereus]. | the pathogenicity of the metabolites of b. cereus was determined by bioassays with white mice, chick embryos, rabbits, and kittens. cell-free filtrates of the cultures of several strains of b. cereus were used for application; in the mice the application was done i. v., i. p. and p. o., in the chick embryos via the allantoic sac, in the kittens p. o. and i. p., in the rabbits via tied-up sections of the small intestine by the loop-test method. it was revealed that some strains of b. cereus produ ... | 1979 | 111402 |
| [structural changes in spores under high temperature exposure]. | the electron microscopy of ultrathin sections of b. cereus spores showed that no lysis and destructive changes occurred in the main structural components of the spores when heated to 99 degrees c (in distilled water). by the time 99% of the population were destroyed, the spores seemed to preserve the exosporium of the sporoderm, the cortex and the sporoblast intact. even autoclaving at 120 degrees c for 15 min brought about no visible changes in the ultrastructure of the spores, though it killed ... | 1979 | 111441 |
| biochemical changes occurring during microcycle sporogenesis of bacillus cereus t. | 1979 | 111675 | |
| inhibition of germination of bacillus cereus t spores by phenylglyoxal. | phenylgloxal at a concentration of 0.6 mm inhibited germination of bacillus cereus t spores as characterized by a decrease in absorbance, dipicolinic acid and loss in heat resistance in a chemically defined growth and sporulation medium. in a germination medium containing l-alanine and adenosine, phenylglyoxal inhibited decrease in absorbance and affected partial loss of viability. it is postulated that phenylglyoxal interacts with free amino groups of various enzymes or amino compounds present ... | 1979 | 112015 |
| [toxins and enzymes of several species of bacillus, especially of the b. cereus-thuringiensis group (author's transl)]. | in the examined strains the production of following toxins or enzymes was determined by bioassay or by semiquantitative and routine diagnostical tests: delta-endotoxin, alpha-exotoxin, beta-exotoxin hemolysin, phospholipase c, proteinase. the production of delta-endotoxin (= a parasporal crystal toxic for several insects) is the only character in that b. thuringiensis differs from b. cereus. other biochemical features as production of so-called alpha-exotoxin (= soluble toxic protein), hemolysin ... | 1979 | 112804 |
| unfolding and refolding of phospholipase c from bacillus cereus in solutions of guanidinium chloride. | 1. protein-fluorescence studies indicated that phospholipase c from bacillus cereus is denatured in solutions of guanidinium chloride. the denaturation was not thermodynamically reversible and followed biphasic kinetics. 2. guanidinium chloride solutions released the structural zn2+ from the enzyme and rendered all histidine residues chemically reactive. in the presence of free zn1+ the enzyme was much more resistant to denaturation. also, the addition for free zn2+ to the denatured enzyme induc ... | 1979 | 113000 |
| physiological studies of a temperature-sensitive sporulation mutant of bacillus cereus t. | growth of temperature-sensitive mutant bacillus cereus t js22-c occurred normally at the restrictive temperature (37 degrees c), but sporulation was blocked at stage 0. the production of extracellular and intracellular proteases and of alkaline phosphatase occurred at 37 degrees c, but the expression of a functional tricarboxylic acid cycle did not. at the permissive temperature (26 degrees c), the mutant sporulated at a slightly lower frequency (60%) and at a lower rate than the parent strain. ... | 1979 | 113065 |
| the effect of transition metal ions on the resistance of bacterial spores to hydrogen peroxide and to heat. | the presence of 10 microm-cu2+ increased the lethal effect of hydrogen peroxide on spores of clostridium bifermentans but not on those of clostridium sporogenes pa 3679, clostridium perfringens, bacillus cereus or bacillus subtilis var. niger. cu2+ at 100 mum also increased the lethal effect of heat on spores of c. bifermentans but not on those of b. sutilis var. niger. the rate and extent of cu2+ uptake by spores of c. bifermentans and b. subtilis var. niger were similar, but examination of uns ... | 1979 | 113488 |
| how specific is the effect of penicillins on the conformation of penicillinase? an experimental model. | 1979 | 113659 | |
| [cryoresistance during sporulation in bacillus (author's transl)]. | the maximal resistance at -- 20 degrees c is obtained as soon as stage v of sporulation in bacillus cereus and for the spore of the mutant marburg strain of b. subtilis bloked at stage v of sporulation. | 1979 | 114081 |
| microbiological transformations of nabilone, a synthetic cannabinoid. | a screening program was conducted to find microorganisms that modify the synthetic cannabinoid nabilone. after purification, the products from three cultures were analyzed by spectral methods to determine their chemical structures. an optically active 9s-hydroxy-6ar,10ar-trans cannabinoid was isolated from a culture of an unidentified soil bacterium designated a24007. from bacillus cereus cultures were isolated a 9s,6'-dihydroxy-6ar,10ar-trans cannabinoid, a 9s-hydroxy-6'-keto-6ar,10ar-trans can ... | 1979 | 114111 |
| two gas-gangrene-like infections due to bacillus cereus. | two cases of postoperative gas-gangrene-like infection due to bacillus cereus are reported, drawing attention to the fact that bacillus cereus, a common environmental bacterium, can occasionally give rise to severe post-operative infection. characteristics of the organism related to the epidemiology and pathogenesis of such infections are discussed. | 1979 | 114263 |
| bacillus cereus: not a contaminant. | 1979 | 114678 | |
| polioencephalomalacia in range cattle. | polioencephalomalacia developed in 27 of 225 cattle grazing on 486 hectares of dry, short, grama grass pasture. chemicals in drinking water, toxin from nitrate-utilizing ruminal bacteria, and documented poisonous plants were considered as etiologic agents. attempts to reproduce the disease by injecting mice and dosing sheep with broth filtrate from nitrate-utilizing ruminal bacteria were not successful. mushrooms collected from the pasture and fed to a cow did not reproduce the disease. | 1979 | 115820 |
| anomeric configuration of n-acetylglucosaminyl phosphorylundecaprenols formed in bacillus cereus membranes. | the structural difference was studied between two n-acetylglucosaminyl phosphorylundecaprenols formed by incubation of bacillus cereus membranes with udp-n-acetylglucosamine. on the treatment with 50% phenol, the major one of these glycolipids (lipid 1) yielded a saccharide phosphate, while the other (lipid 2) yielded n-acetylglucosamine along with a saccharide phosphate. the saccharide phosphates from lipids 1 and 2 were identified as alpha-n-acetylglucosamine 1-phosphate and its beta-anomer, r ... | 1979 | 115872 |
| cephalosporin-sensitive penicillin-binding proteins of staphylococcus aureus and bacillus subtilis active in the conversion of [14c]penicillin g to [14c]phenylacetylglycine. | breakdown of the covalent complex formed between [14c]penicillin g and higher molecular weight, cephalosporin-sensitive penicillin-binding proteins was studied using mixtures of the purified proteins isolated from membranes of staphylococcus aureus and bacillus subtilis. these penicillin-binding proteins were found to release the bound 14c label in a first order process characterized by half-lives of 10 to 300 min at 37 degrees c. denaturation of the penicilloyl.penicillin-binding proctein compl ... | 1979 | 115876 |
| the bacillus cereus toxin: isolation of permeability factor. | the bacillus cereus protein has been obtained from culture fluid in homogenic form as indicated by sds-disc electrophoresis and immunodiffusion not described before. the protein has a molecular weight of 100000 daltons. purification was accomplished by the following steps: (1) removal of ballast nitrous components with de-32 cellulose at ph 7.2; (2) removal of the proteins from the culture filtrate (deluted four times by water) with de-32 cellulose at ph 8.6; (3) elution by 0.005 m tris-hcl buff ... | 1979 | 116438 |
| the action of bacillus cereus phospholipase c on central-nervous-system myelin in freshly isolated and freeze-dried resuspended forms [proceedings]. | 1979 | 116892 | |
| recovery from bacillus cereus sepsis. | a patient with acute leukemia developed two separate episodes of bacillus cereus septicemia during one hospitalization. leukopenia as a consequence of cytotoxic chemotherapy preceded both illnesses. the course of the infections was favorably influenced by the return of adequate numbers of circulating granulocytes and aminoglycoside therapy. only one other compromised host is known to have recovered from this otherwise fatal disease. | 1979 | 117555 |
| effect of dyes on the quantitative recovery of yersinia enterocolitica. | a total of 69 dyes were incorporated separately at different concentrations into an agar medium for evaluation of their effects on the quantitative recovery of five serotypes of yersinia enterocolitica. one strain of pseudomonas aeruginosa and one strain of bacillus cereus were included for comparative purposes. certain dyes were evaluated further for their selective properties with five additional serotypes of y. enterocolitica, three strains of p. aeruginosa, and two of engerobacter spp. metan ... | 1979 | 117750 |
| spore survival during batch dry rendering of abattoir waste. | normal batch dry rendering practice does not ensure sterile products, because bacterial spores are protected against thermal denaturation by the high fat-low water content environment which results from drying the materials at temperatures below those required for sterilization. | 1979 | 117753 |
| dielectric properties of native and decoated spores of bacillus megaterium. | a general model for use in interpreting dielectric data obtained with bacterial endospores is developed and applied to past results for bacillus cereus spores and new results for bacillus megaterium spores. the latter were also subjected to a decoating treatment to yield dormant cells with damaged outer membranes that could be germinated with lysozyme. for both spore types, core ions appeared to be completely immobilized, and decoating of b. megaterium spores did not affect this extreme state of ... | 1979 | 118161 |
| anti-riboflavin activity of 8-o-alkyl derivatives of riboflavin in some gram-positive bacteria. | two new 8-o-alkyl derivatives of riboflavin (rf), i.e., 8-methoxy- (mof), and 8-ethoxy-8-demethyl-d-riboflavin (eof), their tetraacetate, and the tetraacetate of 8-hydroxy-8-demethyl-d-riboflavin (hof) were synthesized. the anti-rf activity of mof, eof and hof was estimated from the ratio cr/ci, where ci is the concentration of test flavin added to the culture medium and cr is the minimum concentration of rf needed to restore the growth inhibition. their activity was also compared with that of r ... | 1979 | 118241 |
| [enterotoxigenecity of bacillus cerous]. | 1979 | 118505 | |
| studies on bacterial cell wall inhibitors. viii. mode of action of a new antibiotic, azureomycin b, in bacillus cereus t. | azureomycin b, a new antibiotic which contains sugar, amino acid and phenol moieties and inhibits gram-positive bacteria, was found to be a specific inhibitor of peptidoglycan synthesis in bacteria. the antibiotic lysed growing cells of bacillus cereus t at a concentration of 10 micrograms/ml but did not affect resting cells. microscopical observation revealed swelling and lysis of the bacterial rods when treated with azureomycin b. the incorporation of [3h]diaminopimelic acid or [14c]glucosamin ... | 1979 | 118956 |
| effects of lysozyme on bacillus cereus 569: rupture of chains of bacteria and enhancement of sensitivity to autolysins. | bacillus cereus 569 is known to be resistant to lysis by lysozyme because of the presence of deacetylated glucosamine residues in its peptidoglycan, and cultures continued to grow even in the presence of lysozyme at 200 microgram ml-1. however, lysozyme caused rupture of the chains of bacteria and promoted the rate of autolysis in a non-growing cell suspension, causing a doubling of the rate of release of radioactively labelled wall material. heat-inactivated cells did not autolyse and were not ... | 1979 | 119028 |
| [biosynthesis of leucine in a reductoisomerase non inducible mutant of bacillus cereus t]. | 1979 | 119554 | |
| bacillus cereus septic arthritis following arthrography. | organisms of bacillus species usually are common laboratory contaminants and nonpathogenic in humans. recently, however, it has been suggested that cultures growing common bacillus species may indeed represent significant infections and should not always be disregarded. a 24-year-old man developed bacillus cereus septic arthritis following routine arthrography, which is an example of a serious orthopedic infection that can be caused by this supposedly nonpathogenic organism. | 1979 | 119603 |
| [effect of the amount of the nutrient medium and the action of small concentrations of noxious substances on the heat production in bacterial broth cultures]. | 1979 | 119622 | |
| bacillus cereus wound infections. | 1979 | 119794 | |
| the growth and form of bacterial colonies. | a simple method is described for measuring the profile of bacterial colonies. profiles were determined for colonies of bacillus cereus, escherichia coli and staphylococcus albus of different ages. in spite of differences in cell morphology, the colony profiles had a common basic structure consisting of steeply rising leading edge connected by a ridge to an interior region where height also rose, though less steeply, to a flat or domed centre. the colony mass increased exponentially through part ... | 1979 | 120410 |
| [studies to investigate the ecological importance of the mass development of hydrodictyon reticulatum in infiltration basins for drinking water. iii. identification of the active components by the use of spectroscopic methods and gas chromatography (author's transl)]. | antibacterial substances from h. reticulatum, that was harvested from its natural habitat or grown under culture conditions, could be isolated by extraction with ethanol or by steam destillation from cells as well as from culture filtrate. the active substances were tested by gas chromatography, infrared spectroscopy and mass spectrometry and characterized as a fraction of saturated fatty acids. its composition seems to depend on external circumstances or culture conditions, respectively, becaus ... | 1979 | 120652 |
| [inhibition of bacillus cereus beta-lactamase by dicloxacillin]. | 1979 | 121024 | |
| effects of glucose, ph, and dissolved-oxygen tension on bacillus cereus growth and permeability factor production in batch culture. | the production of a bacillus cereus enterotoxin, measured as rabbit skin permeability factor (pf), in response to differences in glucose availability, ph, and dissolved oxygen tension was studied in a 1-liter batch fermentor system. glucose had to be present for toxigenesis to occur. in uncontrolled fermentation an increasing inhibition of pf production and growth occurred as ph dropped occurred below 6.5. optimum ph for toxigenesis was 7.0 to 7.5, and fermentations maintained at this level yiel ... | 1979 | 32838 |
| properties and production characteristics of vomiting, diarrheal, and necrotizing toxins of bacillus cereus. | evidence is provided that the enterotoxin of bacillus cereus variously described in the literature as diarrheagenic toxin, diarrheal agent, fluid accumulation factor, vascular permeability factor, dermonecrotic toxin, and intestinonecrotic toxin is a single relatively unstable protein of molecular weight approximately 50,000 and isoelectric point of the order of 4.9. it is presumed to be the enterotoxin responsible for the diarrheal-type b. cereus food poisoning syndrome and it may also be the p ... | 1979 | 104614 |
| a novel glycosidase, an endo-glucosaminidase active on the cell wall peptidoglycan with n-unsubstituted glucosamine residues. | 1979 | 104886 | |
| effects of local anesthetics on bacterial cells. | the membrane effects of chlorpromazine, nupercain, tetracain, and procain were studied using bacillus cereus, b. megaterium, b. subtilis, and streptococcus faecalis, protoplasts from s. faecalis, and isolated membranes from b. subtilis. chlorpromazin, nupercain, and tetracain produced characteristic micromorphological alterations after treatment for 5 to 30 min at ph 7.0 and 20 degrees c; the membrane staining pattern changed from asymmetric to symmetric, complex mesosome-like structures appeare ... | 1979 | 104970 |
| bacillus cereus endocarditis. | 1979 | 105070 | |
| serious infections from bacillus sp. | serious infections caused by organisms of the genus bacillus developed in seven patients. five drug abusers had either endocarditis or osteomyelitis, one leukemic patient had necrotizing fasciitis, and one patient had a ventriculoatrial shunt infection with recurrent bacteremia. all patients recovered. experience with these cases reemphasizes the importance of not dismissing bacillus organisms as culture contaminants, especially when isolated from blood, body fluids, or closed-space infections. | 1979 | 105158 |
| bacillus cereus endogenous panophthalmitis. | a case of severe suppurative endogenous panophthalmitis caused by bacillus cereus resulted from intravenously administered medications. this is the first, to our knowledge, well-documented case of endogenous endophthalmitis associated with this organism. it is recommended that if on gram's stain of the anterior chamber fluid, gram-positive rods are seen, chloramphenicol should be administered in addition to penicillin because of the possibility of b cereus infection. | 1979 | 105693 |
| the spectrum of bacillus bacteremias in heroin addicts. | bacillus bacteremias occurred in two heroin addicts. the first patient had one day of fever and chills after intravenous heroin use. persistent cereus bacteremia consistent with endocarditis was documented and responded to four weeks of antibiotic therapy. the second patient had non-cereus bacillus species isolated from blood cultures three times over eight days, each time after renewed heroin use. the patient remained well, and the bacteremias cleared spontaneously. because bacillus species fre ... | 1979 | 106784 |
| [microbiological aspects of stored hard-boiled eggs]. | hard-bioled eggs in the shell were without any pretreatment stored in air at 20 degrees c and 4 degrees c. furthermore the keeping quality of varnish-coated eggs stored in air at 20 degrees c and of untreated eggs stored in 100% carbon dioxide at the same temperature was studied. hard-boiled eggs stored at 4 degrees c and varnish-coated eggs stored at 20 degrees c were of excellent bacteriological quality up to 5 weeks. untreated eggs stored in air at 20 degrees c showed high microbiological con ... | 1979 | 121493 |
| preparation and properties of an immobilized derivative of penicillinase. | penicillinase (beta-lactamase i, ec 3.5.2.6) secreted by bacillus cereus, strain 569/h, was covalently attached to aminoethyl cellulose via glutaraldehyde. the immobilized derivative shows increased thermostability and decreased susceptibility to conformational changes induced by certain substrates of penicillinase. the decline in the rate of hydrolysis of such substrates was consequently suppressed by immobilization. a marked increase in km was observed with all substrates except for the unsubs ... | 1979 | 219920 |
| [electron microscopic study of normal bacillus anthracoides spores and after exposure to a chloroactive disinfectant]. | the fine structure of bacillus anthracoides spores is similar in general to that of other, taxonomically related species of spore forming bacteria. however, the former is characterized by a well-developed multilayered exosporium and the heterogeneous structure of an envelope. the lethal effect of a chloroactive disinfectant (2/3 of calcium hypochlorite basic salt) is caused by changes in the structural organization of spores, which interferes with the normal permeability barrier and metabolic pr ... | 1979 | 224288 |
| the role of manganese in growth and sporulation of bacillus subtilis. | phosphoglycerate phosphomutase of bacillus subtilis, bacillus cereus and bacillus megaterium required mn2+ as cofactor, whereas the wheat germ and rabbit liver enzymes did not. in the absence of mn2+, b. subtilis did not sporulate in normal sporulation media but it did sporulate if the proper ratio of glucose or glycerol and malate was used. decoyinine, an inhibitor of guanosine monophosphate synthesis, induced sporulation in the presence of excess glucose and malate to the same extent with and ... | 1979 | 225409 |
| metal-coordinating substrate analogs as inhibitors of metalloenzymes. | a group of active-site metal coordinating inhibitors of zinc proteases (carboxypeptidase a, thermolysin, bacillus cereus neutral protease, and angiotensin-converting enzyme) have been synthesized and their properties investigated. their general structures are r-sh and r-nh-po2(o phi)h, where-s- or -o- serve as metal ligands and r refers to an amino acid or peptide group designed to interact with substrate recognition sites. these inhibitors can be extremely potent; thus, n-(2-mercaptoacetyl)-d-p ... | 1979 | 230502 |
| synthesis of choline and ethanolamine phospholipids with thiophosphoester bonds as substrates for phospholipase c. | spectrophotometric assays of esterases are sensitive, rapid, and quite specific when thioester substrates are used. glycerophospholipids with thiophosphoester bonds may be useful as substrates for phospholipase c (ec 3.1.4.3). these have been made from mercaptoglycerol and mercaptoethanol. the thiols were oxidized to disulfides, acylated, and reduced with dithiothreitol. phosphocholine derivatives were made by the classical methods for oxyphosphoesters. the phosphatidyl choline analogue was conv ... | 1979 | 231487 |
| septicemia in children with cancer. | because of the persistently high mortality from sepsis in cancer patients, a retrospective study was designed to identify the causative organisms and to determine the factors affecting the outcome of sepsis. a total of 84 episodes of septicemia in 61 children with cancer were studied. the more frequently isolated organisms were: staphylococcus aureus (21.4%); escherichia coli (18%); klebsiella (7.1%); pseudomonas (6%); and bacteroides fragilis (6%). other isolates included proteus, serratia, aci ... | 1979 | 371000 |
| the variable response of bacteria to excess ferric iron in host tissues. | the enhancement by exogenous ferric iron, both systemic and local, of the infectivity of 120 strains of bacteria, representing 17 genera, was measured in the skin of guinea-pigs. systemic iron enhanced only 23% of 115 strains, and local iron 49% of 71 strains. systemic iron, by an apparently anti-inflammatory action, depressed the size of lesions produced by 27 of the non-enhanced strains from nine of the genera tested. for most strains, the degree of enhancement was small, ranging from 2- to 8- ... | 1979 | 372534 |
| continuous cultivation for apparent optimization of defined media for cellulomonas sp. and bacillus cereus. | steady-state continuous culture was used to optimize lean chemically defined media for a cellulomonas sp. and bacillus cereus strain t. both organisms were extremely sensitive to variations in trace-metal concentrations. however, medium optimization by this technique proved rapid, and multifactor screening was easily conducted by using a minimum of instrumentation. the optimized media supported critical dilution rates of 0.571 and 0.467 h for cellulomonas and bacillus, respectively. these values ... | 1979 | 16345417 |
| liquid chromatographic determination of dipicolinic acid from bacterial spores. | dipicolinic acid was determined by reverse-phase liquid chromatography. elution was with 0.2 m potassium phosphate, ph 1.8, containing 1.5% tert-amyl alcohol or higher concentrations of lower alcohols or acetonitrile. the normal analytical range was 50 to 1,000 mum, which is equivalent to 0.1 to 1 mg of spores per ml with a relative standard error of 2 to 4% and a detection limit of <100 pmol. dipicolinic acid was fully extracted from spores by heating at ph 1.8 for 10 min at 100 degrees c. spor ... | 1979 | 16345469 |
| influence of environmental factors on antagonism of fungi by bacteria in soil: clay minerals and ph. | the soil replica plating technique was used to evaluate the influence of clay minerals and ph on antagonistic interactions between fungi and bacteria in soil. in general, the antagonistic activity of bacteria towards filamentous fungi was greater in soil than on agar. the spread of aspergillus niger through soil was inhibited by serratia marcescens when the organisms were inoculated into separate sites in soil, and this antagonistic effect was maintained when the soil was amended with 3, 6, 9, o ... | 1979 | 16345477 |
| phospholipid dependence of udp-glucuronyltransferase. | very extensive hydrolysis of phospholipids with pure bacillus cereus phospholipase c at 5 degrees c greatly inhibited the maximum demonstrable rate of glucuronidation of p-nitrophenol by udpglucuronyltransferase in guinea pig liver microsomes. lysophosphatidylcholine restored much of the inhibited activity but non-phospholipid surfactants or hydrolysis of diglycerides failed to reactivate. phospholipid depletion likewise inhibited o-aminophenol glucuronidation and phospholipids restored activity ... | 1978 | 203315 |
| role of exogenous phospholipases in triggering platelet aggregation. | 1978 | 207175 | |
| enzymatic properties of phosphatidylinositol inositolphosphohydrolase from bacillus cereus. substrate dilution in detergent-phospholipid micelles and bilayer vesicles. | 1978 | 207692 | |
| synthesis and quantitative structure-activity relationships of antibacterial 1-(substituted benzhydryl)-4-(5-nitro-2-furfurylideneamino) piperazines. | 1-benzhydryl -4- (5-nitro-2-furfurylideneamino) piperazine and 11 substituted analogs were prepared and examined for in vitro antimicrobial activity. the compounds were active against bacillus cereus 7, bacillus megaterium 122, bacillus subtilis 104, clostridium perfringens 13, and the tetracycline-resistant clostridium perfringens 37. regression analyses on the antibacterial activity data based on the hansch approach, using pi, pi2, and sigma parameters, yielded several statistically significan ... | 1978 | 207855 |
| [enzymatic mechanisms for antimicrobial protection of the oral cavity]. | data on the role of oral lysozyme, ribonuclease, deoxyribonuclease and peroxidase in antimicrobial defense of the macroorganism are reviewed. the biochemical and physiological properties of the enzymes secreted by salivary glands and released from emigrating leukocytes are discussed. spectra of antimicrobial action of the enzymes and participation of these enzymes in maintaining the stability of oral biocenosis are described as well as the regulation of these enzymatic activities and the pathoge ... | 1978 | 208288 |
| hydrolytic action of phospholipases on sealed ghosts of mammalian erythrocytes. | 1978 | 211122 | |
| foodborne hazards of microbial origin. | foods can serve as vehicles of many pathogenic and toxigenic agents of disease. bacterial agents comprise three groups: 1) those that grow in the food and produce an active toxin before consumption (e.g., clostridium botulinium); 2) those that merely exist as contaminants in the food but are able to initiate infection when swallowed (e.g., salmonella spp.); and 3) those that multiply and produce large numbers of vegetative cells in the food, then release an active enterotoxin when they sporulate ... | 1978 | 212326 |
| the use of phospholipase c to detect structural changes in the membranes of human erythrocytes aged by storage. | 1978 | 213113 | |
| phosphatase activity of aerobic and facultative anaerobic bacteria. | 1115 strains of aerobic and facultatively anaerobic bacteria were tested for phosphatase activity by a conventional plate method and a microtest. the microtest was devised to allow results to be read after 4 h cultivation. phosphatase activity was found in wide range of species and strains. besides staphylococci, where the test for phosphatase is successfully used, it may be applied as one of the valuable tests for the differentiation of the following species: bacillus cereus, b. licheniformis, ... | 1978 | 216188 |
| preliminary experimental data on inhibition of beta-lactamase i from b. cereus by cu (++) and zn(++). | 1978 | 106864 | |
| effect of hydrolytic enzymes and protein-modifying reagents on gonadotropin receptors in bovine corpus luteum cell membranes. | preincubation of membranes with various concentrations of pronase, trypsin, lipase, phospholipase a from vipera russelli and from crotalus durissus terrificus, phospholipase c from bacillus cereus and from clostridium welchii, acetic anhydride, 2,4-dinitrofluorobenzene and tetranitromethane resulted in a dose-dependent inhibition of 125i-labeled human choriogonadotropin binding. at the submaximal concentrations of enzymes and at both submaximal and maximal concentrations of protein-modifying rea ... | 1978 | 202334 |
| biochemical aspects of the visual process. xxxvii. evidence for lateral aggregation of rhodopsin molecules in phospholipase c-treated bovine photoreceptor membranes. | photoreceptor membranes derived from isolated bovine rod outer segments, are subjected to treatment with phospholipase c (bacillus cereus). this results in varying degrees of hydrolysis of the membrane phospholipids into diglycerides and water soluble phosphate esters without loss of rhodopsin. electron microscopic observations of thin sections and freeze-fractured preparations indicate extrusion of diglycerides from the membranes and their coalescence to lipid droplets, beginning at 20% hydroly ... | 1978 | 647003 |
| production and property of beta-lactamases in streptomyces: comparison of the strains isolated newly and thirty years ago. | productivity and property of beta-lactamases of streptomyces strains isolated from soil some 30 years ago were studied in comparison with those of the newly isolated strains. at least three-quarters of the streptomyces strains produced beta-lactamase constitutively and extracellularly, mainly as penicillinases, as in the cases of those from the newly isolated strains. strains such as s. albus, s. diastatochromogenes, s. fradiae, and s. lavendulae were the highest producing strains, and the amoun ... | 1978 | 666306 |
| transduction in bacillus thuringiensis. | bacteriophage cp-51, originally reported as a generalized transducing phage for bacillus cereus and b. anthracis, has been shown to carry out generalized transduction in several strains of b. thuringiensis. a newly isolated phage, cp-54, which has a broader host range than cp-51, also mediates generalized transduction in b. thuringiensis. cp-51 and cp-54 are similar in size and morphology and are related serologically, but they are not identical. cp-54 is more cold labile than cp-51, and, as wit ... | 1978 | 677877 |
| an enzymic determination for serum phospholipid. | a new colorimetric determination for serum phospholipid is described. firstly, serum phospholipid is incubated with phospholipase c from bacillus cereus, and then the released diglyceride and triglyceride are hydrolyzed completely to fatty acid and glycerol by lipoprotein lipase from pseudomonas fluorescens. secondly, the glycerol produced is enzymatically determined by glycerol dehydrogenase in the presence of nad+, using phenazine methosulfate-nitro blue tetrazolium as color reagents. the abso ... | 1978 | 709886 |
| purification of antibiotics from physarum gyrosum by high pressure liquid chromatography. | a family of five antibiotic substances was isolated from the slime mold physarum gyrosum by high pressure liquid chromatography (hplc). for this purpose, mold was cultured for two weeks in a liquid medium. soluble products were harvested by rotary evaporation of medium and extraction with 1-butanol. paper chromatography in ethyl acetate:pyridine:water (2:2:1 v/v) was used for preliminary fractionation. active components were separated by hplc with a reverse-phase column packed with bondapack c18 ... | 1978 | 714881 |
| toxicity of zinc to fungi, bacteria, and coliphages: influence of chloride ions. | a 10 mm concentration of zn2+ decreased the survival of escherichia coli; enhanced the survival of bacillus cereus; did not significantly affect the survival of pseudomonas aeruginosa, norcardia corallina, and t1, t7, p1, and phi80 coliphages; completely inhibited mycelial growth of rhizoctonia solani; and reduced mycelial growth of fusarium solani, cunninghamella echinulata, aspergillus niger, and trichoderma viride. the toxicity of zinc to the fungi, bacteria, and coliphages was unaffected, le ... | 1978 | 736544 |
| the inhibition of clostridium chauvoei by bacillus cereus metabolites. | 1978 | 105701 | |
| conformational studies on phospholipase c from bacillus cereus. the effect of urea on the enzyme. | 1. when heated in 8 m-urea, phospholipase c(ec 3.1.4.3) from bacillus cereus undergoes conformational transitions depending on the temperatures used. these transitions were studied by examining protein fluorescence, iodide quenching of protein fluorescence, u.v. difference spectroscopy, chemical availability of histidine residues in the enzyme, circular dichroism and catalytic activity. 2. unless simultaneously exposed to elevated temperatures the enzyme appears to be unaffected by 8 m-urea. rem ... | 1978 | 105729 |
| radiosensitivity of bacteriophages of aerobic spore-forming microorganisms. | under conditions of the direct action of radiation on seven original phages of aerobic spore-forming bacteria and four standard phages of e. coli, it was established that they possessed different sensitivity to gamma radiation and were distributed into four groups. the phages of e. coli of the t series, especially t2 phage, proved the most sensitive. the phages of aerobic spore-forming bacilli were characterized by greater resistance to the action of gamma radiation, which is evidently associate ... | 1978 | 105763 |
| production and characterization of two hemolysins of bacillus cereus. | bacillus cereus strain b-48 produced two hemolysins with molecular weights of 52,000 (h-i) and 31,000 (h-ii). a mutant was isolated that produced only h-ii but was identical with the wild type in all other respects. we exploited this mutant to produce h-ii for study that was free of contamination by h-i. by manipulation of media composition, we produced h-i in the absence of h-ii. the hemolysins were precipitated differently by ammonium sulfate, and both exhibited the arrhenius effect when heate ... | 1978 | 105792 |
| thermal analysis of the spores of bacillus cereus with special reference to heat activation. | the heat activation of bacterial spores was studied by means of differential thermal analysis in the temperature range 30-110 degrees c using the spores of bacillus cereus. the thermogram showed three endothermic peaks at 56, 95, and 103 degrees c with one exothermic peak at 105 degrees c during the heating process. the spore coat separated from the native spores also showed a peak at 56 degrees c on its heating thermogram. the peak at 56 degrees c was reversible for both native spores and the s ... | 1978 | 105794 |
| [bacillus cereus septicemia (author's transl)]. | 1978 | 106146 | |
| [microbiological analysis of fruit-flavored toothpastes for children]. | 1978 | 99797 | |
| bacillus cereus as a pathogen. | 1978 | 99823 | |
| phosphatidylinositol as the endogenous activator of the (na+ + k+)-atpase in microsomes of rabbit kidney. | incubation of rabbit kidney microsomes with pig pancreatic phospholipase a2 produced residual membrane preparations with very low (na+ + k+)-atpase activity. the activity could be restored by recombination with lipid vesicles of negatively-charged glycerophospholipids. vesicles of pure phosphatidylcholine and phosphatidylethanolamine were virtually inactive in this respect, but could reactivate in the presence of cholate. incubation of the microsomes with a combination of phospholipase c (bacill ... | 1978 | 147707 |
| [case with the clinical manifestation of anthrax etiologically related to b. cereus]. | 1978 | 152230 | |
| the isolation and cultivation of a single spore using a sterile disposable petri dish and a micromanipulator. | 1978 | 105218 | |
| deoxyribonucleic acid relatedness between bacillus anthracis, bacillus cereus and bacillus thuringiensis. | 1978 | 105229 | |
| [information on phase contrast and differential interference contrast figures--a comparative study (author's transl)]. | 1978 | 105312 | |
| changes in ultraviolet resistance and photoproduct formation as early events in spore germination of bacillus cereus t. | 1978 | 105364 | |
| [b. cereus count in meat and dairy food products]. | studies were carried out to establish the contamination of some meat and dairy food products with b. cereus. a total of 48 heat-treated sausages (32 perishable and 16 durable) and 64 batches of pasteurized milk were sampled. it was found that 25 per cent of investigated sausage samples contained b. cereus. perishables proved to a considerable extent more frequently contaminated (33.3 per cent). the count of b. cereus in such products ranged from 10(1) to 10(3) per g. however, pasteurized milk wa ... | 1978 | 105462 |
| histidine residues of zinc ligands in beta-lactamase ii. | 1. the zn(ii)-requiring beta-lactamase from bacillus cereus 569/h/9, which has two zinc-binding sites, was examined by 270 mhz 1h n.m.r. spectroscopy. resonances were assigned to five histidine residues. 2. resonances attributed to three of the histidine residues in the apoenzyme shift on the addition of one equivalent of zn(ii). 3. although these three histidine residues are free to titrate in the apoenzyme, none of them titrates over the ph range 6.0--9.0 in the mono-zinc enzyme. 4. the abilit ... | 1978 | 33655 |
| production of l-glutamic acid by a bacillus sp. | a strain of bacillus cereus var. mycoides isolated from burdwan soil produces l-glutamate in the medium. the strain is able to grow and produce in a synthetic medium but supplementation with casamino acid or yeast extract improves the yield. maintenance of ph of the fermentation medium near neutrality prolongs the active growth period and improves the yield. glucose and ammonium nitrate were found to be most suitable carbon and nitrogen sources, respectively. cane sugar molasses (as a substitute ... | 1978 | 33882 |
| studies on sphingomyelinase of bacillus cereus. i. purification and properties. | a sphingomyelinase was purified 980-fold with recovery of 25.6% from the culture broth of bacillus cereus, by (nh4)2so4 precipitation and chromatography on cm-sephadex, deae-cellulose and sephadex g-75. the purified preparation was free of lipase, protease and other phospholipases. the enzyme specifically hydrolyzed sphingomyelin to ceramide and phosphorylcholine. lysophosphatidylcholine was also attacked by the enzyme. the enzyme (mr = 24 000) was maximally active at ph 6-7. other properties of ... | 1978 | 23854 |
| effect of ph on the antimicrobial activity of some triphenylmethane dyes. | four common dyes were tested as inhibitors of four types of bacteria over the ph range 5.0-9.0. inhibition of the gram-negative types, salmonella anatum and enterobacter aerogenes, was markedly affected by the ph of the medium. these organisms tolerated concentrations of crystal violet and ethyl violet about 100-fold higher at ph 5.0 than at ph 9.0. above ph 7.0 brilliant green (bg) and malachite green (mg) were precipitated as their respective carbinols and lost their inhibitory properties with ... | 1978 | 27297 |
| interactions between macromolecular adjuvants and drugs. 11. the influence of macromolecules on the microbiologic activity of tetracycline antibiotics. | 1978 | 27822 | |
| tissue sterility in uneviscerated carcasses. | sheep muscle tissue removed aseptically from control carcasses, from uneviscerated carcasses held at 20 degrees c for 24 h, and from carcasses of sheep subjected to stress before slaughter was examined for the presence of bacteria. all samples from a total of 68 carcasses were sterile. whole-body autoradiography of mouse carcasses showed that 14c-labeled fixed bacteria injected after death remained in the lumen of the intestine. live bacteria did not penetrate the mucosal surface until the tissu ... | 1978 | 29564 |
| the influence of high concentrations of carbon dioxide on the germination of bacterial spores. | 1978 | 31348 | |
| hybridization analysis of restriction endonuclease dna fragments of bacillus cereus transcribed during spore outgrowth. | transcribing bacillus cereus dna was visualized by means of autoradiography of electrophoretically separated ecori restriction endonuclease dna fragments hybridizing 32p-labeled rna. hybridization of rna of dormant spores, vegetative cells, and outgrowing spores indicates the following. (i) a large fraction of the nonribosomal rna in dormant spores is transcribed at a limited number of regions on the bacterial chromosome. (ii) after induction of spore germination, transcription activity is not l ... | 1978 | 96096 |
| properties of bacillus cereus temperature-sensitive mutants altered in spore coat formation. | three conditional bacillus cereus mutants altered in the assembly or formation of spore coat layers were analyzed. they all grew as well as the wild type in an enriched or minimal medium but produced lysozyme and octanol-sensitive spores at the nonpermissive temperature (35 to 38 degrees c). the spores also germinated slowly when produced at 35 degrees c. temperature-shift experiments indicated that the defective protein or regulatory signal is expressed at the time of formation of the outer spo ... | 1978 | 96097 |
| [repeated microcycle in bacillus cereus]. | 1978 | 96318 | |
| the effect of nalidixic acid, rifampicin and chloramphenicol on the synthesis of phospholipase c in bacillus cereus. | the effect of nalidixic acid, rifampicin and chloramphenicol on the synthesis of phospholipase c (ec 3.1.4.3) has been studied in washed bacillus cereus cells resuspended in nutrient broth. in the absence of inhibitors, the synthesis showed a biphasic pattern. no synthesis of release of enzyme was found in the presence of chloramphenicol. when rifampicin was added, phospholipase c synthesis continued for 10-15 min. nalidixic acid, at concentrations which inhibited dna synthesis completely, permi ... | 1978 | 96661 |
| bacillus cereus-induced malabsorption in young mice. | following a single, oral dose of bacillus cereus (2 x 10(8) bacteria) in vitro intestinal absorption of d-glucose, d-galactose, l-arginine, l-histidine, l-ornithine and l-proline in young mice (aged 2--3 1/2 months) decreased. malabsorption of d-glucose was dose- and time-dependent. impaired absorption of d-glucose occurred throughtout the length of the small intestine, particularly distally. following hydrolysis of d-maltose at the brush border, d-glucose absorption in infected mice and that of ... | 1978 | 97113 |
| an improved electrophoretic method for identifying antibiotics with special reference to animal tissues and animal feeding stuffs. | 1978 | 97257 | |
| preliminary x-ray crystallographic data on phospholipase c from bacillus cereus. | 1978 | 97390 |