| electron microscopic study of membranes and walls of bacteria and changes occurring during growth initiation. | thin sections of stationary-phase streptococcus lactis cells showed that the wall and membrane are 20 and 7 nm thick, respectively. whole cells were examined by negative staining with ammonium molybdate and by shadowing. on air-drying of whole cells, the membrane pulled away from the wall revealing adhesions between these organelles. adhesions could not be seen after subculture of the stationary-phase cells into complex media or into solutions containing glucose, kcl, and cacl(2) in tris(hydroxy ... | 1969 | 4180467 |
| location of bacterial polysaccharide during various phases of growth. | polysaccharide-containing material was located by histochemical staining on ultrathin sections of bacillus cereus and several clostridial species during various phases of growth. these components were located along the cell wall in young vegetative cells and along the developing cortex in sporulating cells. in b. cereus any carbohydrate-containing material present along the forespore membrane was too small to be detected by direct staining. however, in three clostridial species such material was ... | 1969 | 4182530 |
| quantitative assay of a single proteolytic enzyme in a crude mixture of bacterial proteinases. | | 1969 | 4189511 |
| the location of chemical components on ultrathin sections of bacillus cereus embedded in glycol methacrylate. | | 1969 | 4189833 |
| association of the crystalline inclusion of bacillus thuringiensis with the exosporium. | thin sections of sporulating cells of bacillus thuringiensis show a marked association between the crystalline inclusion and the exosporium. | 1970 | 4192566 |
| spores of microorganisms. 23. interdependence of intra- and extra-cellular levels of calcium: its effect on the germination of bacterial spores in different media. | | 1970 | 4193500 |
| the effect of fixation on the staining of the bacterial cross cell wall. | | 1970 | 4194094 |
| kinetics of -lactamase inactivation of penicillins i: effect of side-chain structure, ionic strength, ph, and temperature. | | 1973 | 4196205 |
| rna polymerase from vegetative cells and spores of bacillus cereus t. ii. peptide composition. | | 1973 | 4196221 |
| penicillin-binding component of bacillus cereus. | (14)c-penicillin is irreversibly bound by bacillus cereus 569. incubation of penicillin-treated cells in a cell wall digestion medium results in solubilization of approximately 60% of the irreversibly bound lable. the extent of the solubilization is the same when cells are prepared by either a cold or 37 c treatment procedure. however, spheroplasts prepared by the cold treatment are leaky. when the resulting spheroplasts are incubated in supplemented medium, reduced rates and levels of penicilli ... | 1973 | 4196243 |
| outgrowth of bacillus cereus spores harboring bacteriophage cp-51 dna. i. initiation of bacteriophage development. | time of initiation of bacteriophage cp-51 rna synthesis, inhibition of host dna synthesis, initiation of cp-51 dna synthesis, and release of phage was determined in infected bacillus cereus cells and outgrowing spores harboring phage dna. the development of phage in outgrowing spores is initiated 45 min after induction of spore germination and then proceeds at a rate similar to that observed in infected cells. although spore rna synthesis is inhibited by the presence of chloramphenicol or puromy ... | 1973 | 4196633 |
| involvement of a carboxyl group in the active site of bacillus cereus 569-h penicillinse ( -lactamase i). | | 1973 | 4197157 |
| inhibition of phosphoenolpyruvate:uridine diphosphate n-acetylglucosamine enolpyruvyltransferase by uridine diphosphate n-acetylmuramyl peptides. | | 1973 | 4197158 |
| characterization and partial purification of -hydroxybutyrate dehydrogenase from sporulating cells of bacillus cereus t. | | 1973 | 4197242 |
| effect of aflatoxins on microorganisms. | | 1972 | 4197365 |
| [toxic properties of the metabolites of some saprophytic bacteria]. | | 1972 | 4197401 |
| the effect of d-l-erythro- - -dihydroxybutyraldehyde (diba) on the spores of bacillus cereus: germination, stimulation and outgrowth inhibition. | | 1973 | 4197475 |
| [study of the antibiotic activity of mycetes isolated from the soil of various regions of bulgaria. i]. | | 1972 | 4197602 |
| induction of biohydrogenation of oleic acid in bacillus cereus by increase in temperature. | | 1973 | 4197961 |
| extracellular factor synthesized by bacillus cereus which evokes a dermal reaction in guinea pigs. | a guinea pig skin assay was developed as a measure of ileal loop fluid-inducing factor in the rabbit and possibly of the causative principle of bacillus cereus food poisoning. a green or bloody necrotic reaction was produced in the guinea pig skin by injection of culture filtrates from 21 of 24 b. cereus strains tested, and by no other bacillus species tested except for the closely related b. thuringiensis. the skin factor was synthesized and excreted by logarithmically growing cells, inactivate ... | 1973 | 4198101 |
| environmental factors internal to the host that affect the sucess of microbial insecticides. | | 1973 | 4198128 |
| electron microscopy of bacillus subtilis protoplast membrane after treatment with phospholipase a 2 and phospholipase c. | | 1973 | 4198136 |
| [survival of some terrestrial microorganisms in space]. | | 1972 | 4198265 |
| toxicity of metabolites produced by the "alternaria". | | 1973 | 4198474 |
| tetracycline interference with the bactericidal effect of serum. | | 1973 | 4198604 |
| purification and properties of an extracellular polysaccharide containing amino sugars formed by bacillus cereus. | | 1973 | 4198886 |
| morphological abnormalities of fungi induced by volatile microbial metabolites. | | 1973 | 4199221 |
| release and recovery of forespores from bacillus cereus. | a method is described which makes possible the release of immature forespores from sporulating cells at specific stages of development, from the completion of stage iii through to mature spore formation. with the aid of zonal density gradient centrifugation, the method makes possible the recovery of quantities of forespores ample for biochemical and physical studies. with the capability to examine forespores and some mother cell components independently, we have established that several enzymes ... | 1973 | 4199507 |
| exosporium and spore coat formation in bacillus cereus t. | the exosporium of bacillus cereus t was first observed as a small lamella in the cytoplasm in proximity to the outer forespore membrane (ofsm) near the middle of the sporangium. serial sections, various staining methods, and enzyme treatments failed to show any connections between the small lamella and the ofsm. the advancing edge of the exosporium moved toward the polar end of the cell until the spore was completely enveloped. the middle coat was formed between the exosporium and the ofsm from ... | 1973 | 4199508 |
| [peracute mastitis caused by bacillus cereus]. | | 1972 | 4199535 |
| [the bacteriology of dehydrated vegetable products]. | | 1972 | 4199536 |
| [studies on the activity of proteolytic enzymes in bacillus anthracis and bacillus cereus]. | | 1973 | 4199573 |
| comparison of bacillus thuringiensis with other bacillus species based on enzymoserological examinations of their proteolytic enzymes. | | 1973 | 4199697 |
| pharmacokinetic studies on minocycline in man. | | 1973 | 4199710 |
| phospholipase c (bacillus cereus) acts only at the inner surface of the erythrocyte membrane. | | 1973 | 4199713 |
| [various phenomena accompanying lethal shock due to bacillus cereus]. | | 1973 | 4199843 |
| [the isoelectric point of extracellular proteases of certain bacterial species]. | | 1972 | 4200183 |
| [ozone for disinfection of water contaminated with vegetative and spore forms of bacteria, fungi, and viruses]. | | 1973 | 4200343 |
| destruction of psychrophilic strains of bacillus by chlorine. | | 1973 | 4200453 |
| development of ultraviolet resistance in sporulating bacillus cereus t. | ultraviolet (uv) resistance patterns of sporulating bacillus cereus were determined. six different categories of uv resistance were discernible as the organism progressed from exponential growth to the free, mature spore. light microscope observations allowed the assignment of certain sporulation stages to specific uv resistance categories. marked changes in uv resistance were associated with stages iii, mid-iv, and post-iv of sporulation. dipicolinic acid was shown to sensitize forespores to uv ... | 1973 | 4200858 |
| carbon monoxide production from hydroxocobalamin by bacteria. | | 1973 | 4200896 |
| advances in the treatment of infectious diseases. | | 1973 | 4201148 |
| measurement of heat resistance parameters for spores isolated from canned products. | | 1973 | 4201180 |
| sensitivity of three selected bacterial species to ozone. | the minimal lethal concentration of ozone in water was determined for three bacterial species: escherichia coli, bacillus cereus, and bacillus megaterium. a contact period of 5 min was selected. the lethal threshold concentration for the cells of b. cereus was 0.12 mg/liter while that for e. coli and b. megaterium was 0.19 mg/liter. low concentrations of ozone were ineffective when organic matter was present to interfere with the action of ozone on the bacterial cells. also determined during the ... | 1973 | 4201643 |
| germination of spores of bacillus cereus in milk and milk dialysates: effect of heat treatment. | | 1973 | 4201828 |
| screening and isolation of penicillinase inhibitor, ka-107. | it is known that penicillin resistance of bacteria is mainly caused by the inactivation of penicillin by penicillinase derived from such strains. we have developed a screening procedure for penicillinase inhibitors. several microorganisms were found to produce such inhibitors, and from the culture filtrate of streptomyces gedanensis atcc 4880 a penicillinase inhibitor, named ka-107, was isolated. the characteristics of this inhibitor were revealed by an in vitro test by using penicillinase deriv ... | 1973 | 4202340 |
| in vitro stimulation of lecithin synthesis in rat liver mitochondria and microsomes after treatment with phospholipase c. | | 1973 | 4202546 |
| differences in susceptibility to phospholipase c of free and membrane-bound phospholipids of mycoplasma hominis. | | 1973 | 4202552 |
| analytical determination of the buoyant density of dna in acrylamide gels after preparative cscl gradient centrifugation. | | 1973 | 4202826 |
| kinetics of beta-lactamase inactivation of penicillins. ii. effect of competitive inhibitors. | | 1973 | 4203115 |
| scanning electron microscopy of bacterial colonies. | a technique is described for observing bacterial colony growth. bacillus cereus, b. subtilis, and b. cereus var. mycoides were grown on strips of dialysis membrane layered on nutrient agar. microcolonies of the organisms on strips were fixed in formalin vapor in situ; the strips then were removed from the agar and secured to scanning microscope specimen stubs without markedly disturbing the cellular arrangement. scanning electron micrographs clearly depict morphology of individual cells, as well ... | 1973 | 4203336 |
| [effect of water activity on the development of microorganisms in fine-pored systems (kaolinite)]. | | 1973 | 4203670 |
| thin layer chromatography methods for detecting hippurate hydrolase activity among various bacteria (pseudomonas, bacillus, enterobacteriaceae). | | 1973 | 4203919 |
| comparative immunological and electrophoretic studies on ribosomal proteins of bacillaceae. | | 1973 | 4203929 |
| comparison of ribosomal rna-binding protein "l2" isolated from different bacterial species. | | 1973 | 4203930 |
| synthesis and antimicrobial properties of 17beta-amino-4-aza-5alpha-androstane and derivatives. | | 1974 | 4204343 |
| unsaturated fatty acid synthesis is not required for induction of lactose transport in escherichia coli. | | 1974 | 4204551 |
| [live bac. cereus in some food products]. | | 1973 | 4204644 |
| biosynthesis of the crystal protein of bacillus thuringiensis var. tolworth. 2. on the relation of transcriptional and translational events in the growth cycle. | | 1973 | 4204719 |
| time course of purine nucleoside phosphorylase occurrence in sporulation of bacillus cereus. | purine nucleoside phosphorylase (ec 2.4.2.1) from bacillus cereus t was examined at hourly intervals during growth and sporulation. the enzyme has maximal activity in extracts prepared from cells during stages i and ii. the activity during exponential growth is only 6.6% of the maximum and that in free spores is only 3.3%. conservation of the purine nucleoside phosphorylase during sporulation is apparent as shown by the gradual increase in heat resistance. | 1972 | 4204910 |
| isotopic study of control of the lysine biosynthetic pathway during sporulation of bacillus cereus. | the extent of incorporation of aspartate into dipicolinic acid and into various amino compounds was determined in bacillus cereus at various times before, during, and near the end of synthesis of dipicolinic acid. the purpose of this study was to gain further information on the in vivo control of the biosynthesis of amino acids derived from aspartate. control of the lysine biosynthetic pathway was of particular interest with regard to sporulation, owing to the important role of diaminopimelate a ... | 1972 | 4204913 |
| [fixation with tapo in ultrastructural study of bacterial cells. i. cell wall of bacillus cereus in ultra-thin sections]. | | 1972 | 4204943 |
| [chemical and physico-chemical properties of the exo-enterotoxin of bacillus cereus]. | | 1973 | 4204956 |
| association of bacillus cereus with food poisoning in dogs. | | 1974 | 4205050 |
| chemical composition and ultrastructure of native and reaggregated membranes from protoplasts of bacillus cereus. | conditions were defined for producing protoplasts with lysozyme and isolating the protoplast membranes from cells of bacillus cereus t harvested late in the exponential growth phase just before sporogenesis. the membranes contained approximately 60% protein, 30% lipid, 6% carbohydrate, and 1% ribonucleic acid. seventeen proteins were distinguished by molecular size in the membrane solubilized with sodium dodecyl sulfate, and 12 in that with phenol and acetic acid. the lipid fraction consisted of ... | 1974 | 4205199 |
| [asimple apparatus for measuring the efficiency of quick acting disinfectants and sterilizing solutions. application to the action of sodium hypochlorite against bacterial spores]. | | 1973 | 4205286 |
| [bacterial food poisoning caused by bac. cereus]. | | 1973 | 4205334 |
| [the variability of actinomyces aureoverticillus 1306]. | | 1973 | 4205356 |
| improved procedures for the determination of oxytetracycline in milk, milk products; chicken muscle, liver; and eggs. | | 1972 | 4205446 |
| letter: bacillus cereus endocarditis in an addict. | | 1974 | 4205842 |
| characterisation & identification of two aerobic spore forming bacteria producing extracellular glutamic acid & valine respectively. | | 1973 | 4205940 |
| a cryptic prophage carried by bacillus cereus. | | 1973 | 4205982 |
| the relative susceptibility of four cephalosporins to a beta-lactamase from bacillus cereus. | the effects of purified beta-lactamase from bacillus cereus on the activity of four cephalosporins are described. drug inactivation was measured spectrophotometrically and confirmed by microbiological assay and by microbiological techniques involving determinations of minimum inhibitory concentrations and growth curves of staphylococcus aureus nctc 6571 (oxford) in broth containing drug +/- enzyme. cephaloridine was the most sensitive of the four cephalosporins, followed by cephalothin and the s ... | 1973 | 4206088 |
| [submicroscopic structure of the bacterial cell wall (review of the literature)]. | | 1973 | 4206610 |
| [bacillus cereus as the cause of bovine mastitis. i. report on the occurrence of b-cereus mastitis and on studies concerning infection of sheep and cows with the isolated strain]. | | 1973 | 4206759 |
| antimicrobial activity of sodium copper chlorophyllin. | | 1974 | 4206818 |
| use of ultraviolet radiation to locate dipicolinic acid in bacillus cereus spores. | a novel method is described that allows a direct determination of the location of a portion of the dipicolinic acid (dpa) in spores. ultraviolet (uv) irradiation is shown to cause cross-linkage of dpa to spore proteins which have the characteristics of membrane proteins. we suggest that dpa resides in the inner forespore membrane (ifsm) and spore cytoplasm (i.e., the spore protoplast). only that portion of the dpa in the vicinity of the ifsm appeared to form uv-induced dpa-protein adducts. | 1974 | 4206870 |
| phospholipid metabolism and membrane synthesis during sporulation in bacillus megaterium. | in view of previously published reports of localized membrane growth in exponentially growing bacillus megaterium and in sporulating bacillus cereus, an attempt was made to describe phospholipid metabolism and the topology of membrane synthesis during sporulation in b. megaterium. the cells were pulsed with radioactive glycerol or acetate at the time of septum formation, and the specific activity of the lipid fraction was measured at various times through the free spore stage. the bulk of the ma ... | 1974 | 4206872 |
| [enterotoxins produced by staphylococci and bacillus cereus]. | | 1973 | 4206898 |
| early biochemical events occurring after infection of bacillus cereus 569-sp1 with bacteriophage gsw. | after infection of bacillus cereus 569-sp1 with the 5-hydroxymethyluracil-containing phage gsw, new dttpase, dutpase, and dump-hydroxymethylase activities appear. no significant changes in activities of other pyrimidine ribonucleoside or 2'-deoxyribonucleoside triphosphate nucleotidohydrolases were detected. dutp and dump inhibit the dttpase activity, whereas dttp failed to inhibit dutpase activity. the k(m) value for the substrate dutp is 10(-4) m and for dttp is 4.85 x 10(-4) m. thymidylate sy ... | 1974 | 4206941 |
| effects of concentration of volatile metabolites from bacteria and germinating seeds on fungi in the presence of selective absorbents. | | 1974 | 4207172 |
| on earlier states of the biochemical system. | | 1974 | 4207200 |
| [bovine mastitis due to bacillus cereus. ii. antibiogram and pathogenicity tests of the isolated strain]. | | 1974 | 4207432 |
| [the concentration of inclusion endotoxin in cultures of entomopathogenic crystal forming bacilli]. | | 1973 | 4207538 |
| two outbreaks of bacillus cereus food poisoning in canada. | | 1974 | 4207768 |
| mesosomes in bacillus cereus 569 and the production of extra membranes by treatment with actinomycin-d. | | 1974 | 4207871 |
| simple photometric assay of beta-lactamase activity. | a simple photometric assay of beta-lactamase activity was developed. the method is based on a decrease in optical density at 620 nm caused by the formation of a penicilloic acid-iodine complex. the enzymatic reaction is instantaneously stopped by the addition of a concentrated iodine-tungstate solution. data showing the time and concentration dependence of the reaction are presented. by varying both the time of the assay and the concentration of the enzyme, substrates of widely different v(max) ... | 1972 | 4207957 |
| effect of oxygen on heme and cytochrome content in some facultative bacteria. | | 1973 | 4208579 |
| a method of freeze-drying and fixing bacterial cultures for electron microscopy. | | 1973 | 4208668 |
| [electrokinetic properties of the cells of microorganisms and their taxonomy]. | | 1973 | 4208671 |
| [methods of working with bacterial microcultures]. | | 1973 | 4208673 |
| [newly discovered sugars in the specific polysaccharides of bacteria]. | | 1972 | 4208820 |
| novel method for detection of beta-lactamases by using a chromogenic cephalosporin substrate. | a new cephalosporin with a highly reactive beta-lactam ring was found to give an immediate color change in the presence of beta-lactamases from many bacteria, including staphylococci, bacillus species, enterobacteriaceae, and pseudomonas. the reaction is confined to organisms producing beta-lactamases, but it is sufficiently sensitive to indicate the presence of this enzyme is small amounts in strains previously considered not to produce it. the compound has an unusual ultraviolet spectrum, and ... | 1972 | 4208895 |
| effect of glucose on the biosynthesis of the membranes of bacillus. | | 1974 | 4209038 |
| [experiments and considerations on the sterilization of thermolabile materials with peracetic acid]. | | 1974 | 4209084 |
| control of cell division in bacteria. | | 1974 | 4209200 |
| evidence for membrane cholesterol as the common binding site for cereolysin, streptolysin o and saponin. | | 1974 | 4209248 |
| letter: four minor antibiotics from macarbomycins. | | 1973 | 4209530 |
| microcalorimetry applied to certain species of bacteria growing in sterilized separated milk. | | 1974 | 4209942 |
| contamination of blood cultures from a commercial beta-lactamase preparations. | | 1974 | 4210011 |