Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| properties of bacillus cereus spore coat mutants. | two classes of spore mutants have been selected in bacillus cereus t, those producing lysozyme-sensitive spores, and those producing spores dependent upon lysozyme for germination. one mutant from each class was studied in detail and found to have defective packing of the spore coat layers. the major spore coat poplypeptide appeared to be altered on the basis of gel electrophoretic profiles and/or peptide maps of half-syctine-containing peptides. the spores of the mutants of both classes were se ... | 1975 | 806578 |
| an insect toxin from spores of bacillus thuringiensis and bacillus cereus. | spores of bacillus thuringiensis contain a toxin active against lepidopterous larvae. this toxin can be solubilized by extraction with reagents which dissolve the protein crystal of b thuringiensis. it is inactivated by crystal-specific antiserum. spores of bacillus cereus contain a similar toxin although the specific activity is much lower than the spores of b. thuringiensis. the b. cereus toxin contains a single major polypeptidecomponent. toxic activity can be solubliized from spores of both ... | 1975 | 806656 |
| the metal ion dependence of phospholipase c from bacillus cereus. | 1. the zinc content and metal ion dependence of phospholipase c(phosphatidylcholine cholinephosphohydrolase, ec 3.1.4.3) from bacillus cereus have been examined. 2. the native enzyme contained about 2 atoms of tightly bound zinc/molecule. 3. incubation of the enzyme with edta or with o-phenanthroline caused inactivation. the inactivation was accompanied by the removal of one zinc atom from the enzyme and could be fully reversed by the addition of zn2+ or co2+ to the enzyme and partly reversed by ... | 1975 | 807246 |
| bacillus cereus beta-lactamase. reaction with n-bromosuccinimide and the properties of the product. | the effect of n-bromosuccinimide on the enzymatic activity and the conformation of a bacillus cereus beta-lactamase (penicillin amido-beta-lactamase ec 3.5.2.6) was studied. incubation with 10 mum n-bromosuccinimide caused over 95% decrease of the enzymatic activity within 15 min. spectrophotometric titration with n-bromosuccinimide showed that the reaction proceeded in two steps. the half-inactivated enzyme was prepared by the reaction with n-bromosuccinimide and its properties examined. amino ... | 1975 | 807248 |
| pathogenicity of bacillus cereus isolated from trichoplusia ni larvae. | 1975 | 807657 | |
| synthesis and antibacterial and antifungal activities of 5-nitro-2-furfurylidene polyhalophenoxyacethydrazides viii. | fifteen 5-nitro-2-furfurylidene phenoxyacethydrazides were synthesized, and the antibacterial and antifungal activities of the compounds prepared were determined against different microorganisms. the o-methoxy derivative was found to be the most active compound. | 1975 | 807705 |
| 2-phenethylimidazole derivatives. synthesis and antimycotic properties. | compounds of type (x = o, nh; ar and ar' = phenyl of substituted phenyl; ten examples) were prepared and assayed against miconazole (ii,x = o; ar = ar' =2,4-cl2c6h3) as potential antimycotic agents. optimal activity was noted for i(x = o; ar = ar' = 2,4-cl2c6h3), the direct analog of miconazole. it is about one-tenth as active. | 1975 | 807735 |
| [ultrastructure of bac. anthracis and bac. cereus]. | a study was made of the ultrastructure of bac. anthracis and bac. cereus (strains 1835 and 205). there were established definite morphological differences between the bacilli under study. the cell wall was much thicker in the causative agent of anthrax, it was permeated by tubules; the surface of the wall was covered by a thick layer of osmiophilic material. the spore membrane of bac. anthracis was multistratal in character; osmiophilic filaments were seen on the surface of exosporium. fungoid p ... | 1975 | 808059 |
| microflora of maize prepared as tortillas. | very little is known of the microflora in tortillas, the major component in the diet of many guatemalans and other central americans. based in a guatemalan highland indian village, this study examined the types and amounts of bacteria, yeasts, and molds in tortillas and in their maize precursors. coliforms, bacillus cereus, two species of staphylococcus, and many types of yeast were the main contaminants, but low concentrations of alpha-hemolytic streptococcus, facultative clostridium, and other ... | 1975 | 808168 |
| comparison of beta-lactamase ii from bacillus cereus 569/h/9 with a beta-lactamase from bacillus cereus 5/b/6. | a mutant of bacillus cereus 5/b, strain 5/b/6, produces a beta-lactamase ii-like enzyme but no beta-lactamase i. beta-lactamases ii and ii 5/b/6 appear to show a high degree of homology, but there are significant differences in their enzymic properties. | 1975 | 808215 |
| a hg (ii) induced conformational change in penicillinase. | penicillinase (e.c. 3.5.2.6) from bacillus cereus 569/h is inhibited by hg(ii). the inhibition is characterized by non-competitive kinetics and can be reversed by edta. a hg(ii) induced conformational change is indicated because: (1) the edta regenerated activity is unstable and is rapidly converted to an iodine-sensitive state, and (2) an irreversible change in the circular dichroism spectrum at 222 nm is found. | 1975 | 808510 |
| effect of the lanthanides, lanthanum and neodymium on the heat resistance of bacillus cereus spores. | the lanthanides, lanthanum and neodymium, do not completely replace calcium in producing heat-resistant spores in bacillus cereus sv1. the chelate stability of calcium-dipicolinic acid appears to be important in the heat resistance of bacterial spores as does the ability of calcium to produce a hydrophobic environment. | 1975 | 808682 |
| [microflora of active ooze participating in the decomposition of sulfanilic acid]. | microflora of domestic water can be a source of active ooze adapted to sulphanilic acid. adaptation of the microflora to sulphanilic acid at a concentration of 170-200 mg/l takes 6 to 8 days. the microflora of active ooze, immediately after adaptation, consists mainly of pseudomonas species, ps. denitrificans, ps. fluorescens, ps. striata, ps. putida, etc., and also of achromobacter stutzeri, achromobacter flavum, mycobacterium phlei, mycobacterium mucosum, bacillus mesentericus, bac. cereus, sa ... | 1975 | 808686 |
| [biosynthesis of group b vitamins by yeasts--symbionts of xylophagous insects]. | the biosynthesis of vitamins of the b group was studied in the yeasts debaryomyces and zygowillia--the symbionts of insects--xylophages. these yeasts provide the vitamins of the b group (biotin, thiamine, inositol, pyridoxine, nicotinic and pantothenic acids) for the preimaginal phases of insects--xylophages. the presence of these vitamins under the bark of trees and in other places of insect habitation is related to the viability of the yeasts. the content of the vitamins in the phloem depends ... | 1975 | 808689 |
| experimental infection of rabbits with bacillus cereus. | bacillus cereus was able to grow and produced local infections following subcutaneous or intramuscular injection. an inflammatory response was produced with necrosis of muscle fibres and calcification. the organism was sensitive to chemotherapeutic agents on in vitro tests. | 1975 | 808922 |
| reimposition of heat-resistant on germinated spores of bacillus cereus by osmotic manipulation. | 1975 | 809041 | |
| bacillus cereus intoxication followed by periorbital oedema. | 1975 | 809090 | |
| germination of bacillus cereus endospores: a proposed role for heat shock and nucleosides. | spores of bacillus cereus t prepared in a glucose - yeast extract - salts broth germinated in l-alanine or more rapidly in l-alanine plus inosine or adenosine. the nucleosides alone were not germinative. inosine was shown to produce no pregerminative changes in spores that prepared them for more rapid germination later in l-alanine. experiments which measured the interaction of nucleosides, heat shock, and d-alanine on germination rates suggested that nucleosides may potentiate l-alanine-induced ... | 1975 | 809124 |
| cross-reactions of streptococcus mutans due to cell wall teichoic acid. | antisera to the whole cells of streptococcus mutans cross-reacted with antigen extracts from four other gram-positive species, as well as with those of three other oral streptococci. similarly, antisera to these bacteria cross-reacted with extracts from s. mutans and with those from each other. using a purified phenol extract of the walls of s. mutans, which was identified by chemical, immunochemical, and enzymatic analyses as glycerol teichoic acid, the cross-reactions were shown to be specific ... | 1975 | 809357 |
| ribonucleic acid polymerase of germinating bacillus cereus t. | it appears that a de novo synthesis of the deoxyribonucleic acid-dependent ribonucleic acid-polymerase in bacillus cereus t takes place fairly late in outgrowth, at the onset of the vegetative cycle. therefore, the ribonucleic acid-polymerase used by germinating spores is the one carried on from sporulating cells. however, the sporal enzyme is less soluble that the vegetative one, and its "core" is bound to two extra peptides. this complexing to other molecules could play a role in the regulatio ... | 1975 | 809425 |
| protease associated with spores of bacillus cereus. | a proteolytic activity is associated with the dormant spores of bacillus cereus t and can be solubilized by washing the spores with 1 m kcl. this proteolytic activity is responsible for the attack of beta chains of ribonucleic acid-polymerase in extracts of dormant spores of this organism. | 1975 | 809429 |
| determination of bacterial cell concentrations by electrical measurements. | an instrument was developed to measure the concentration of bacterial suspensions by their electrical characteristics. it employed a square-wave signal generator, a tetra-polar electrode probe, and a voltage detector in the form of an oscilloscope. when electrical measurements were made on washed bacteria obtained from cultures or urine specimens, there was a direct relationship between the concentration of the cells and the electrical characteristics of the system as reflected by voltage change ... | 1975 | 809465 |
| the effect of chlorine on spores of clostridium bifermentans, bacillus subtilis and bacillus cereus. | the effect of chlorine on the germination, outgrowth, colony formation and structure of spores of clostridium bifermentans, bacillus subtilis var. niger and bacillus cereus was examined. chlorine decreased heat resistance and slowed or prevented germination and swelling, but spores that did swell were usualy able to elongate to form vegetative cells. chlorine removed protein from spores, apparently from the coat, and allowed lysozyme to initiate germination. treatment with other agents that remo ... | 1975 | 809541 |
| [determination of heat resistance of bacillus cereus t spores using a germination ratio]. | 1975 | 809600 | |
| [effects of glycineon the germination mechanism of bacillus cereus t spores]. | 1975 | 809601 | |
| [on the efficiency of bac. cereus var. mycoides (flügge) during the release of nutritive substances from various organic materials (author's transl)]. | 1975 | 809942 | |
| some biochemical aspects of the enzymic transformation of cortisol with bacillus cereus. | the role of a variety of compounds including organic acids, vitamins, growth promoting substances, purines and pyrimidines in the bioconversion of cortisol with bacillus cereus was investigated. the transformation of cortisol to prednisolone and pregn-4-en-11beta, 17alpha,20beta, 21-tetrol-3-one was affected by these compounds in different manners. the enzymatic delta1-dehydrogenation reaction was greatly induced with fumarate, menadione, and xanthine treatments. however, the enzymic reduction o ... | 1975 | 809951 |
| the partial amino acid sequence of the extracellular beta-lactamase i of bacillus cereus 569/h. | the chemical structure of the extracellular beta-lactamase i of bacillus cereus 569/h was investigated. three electrophoretically homogenous charge variants of this enzyme were isolated and amino acid analysis of each revealed no significant differences. however, a degree of n-terminal heterogeneity was found by direct end-group modification of the protein and also on alignment of peptides from tryptic and chymotryptic digestion. the n-terminal heterogeneity observed was great enough to explain ... | 1975 | 810136 |
| the amino acid sequence of cerexin a (studies on antibiotics from the genus bacillus. vii. | n-bromosuccinimide cleavage reaction on cerexin a liberated allo-isoleucine. treatment with conc. hydrochloric acid cleaved the antibiotic into two peptide fragments selectively at gamma-hydroxylysine residue. deacylation with an enzyme preparation from pseudomonas sp. afforded deacyl cerexin a. the amino acid sequences of these peptide fragments were examined by edman degradation. from all the results, the entire amino acid sequence of cerexin a was deduced. | 1975 | 810467 |
| disinfectant effect of performic acid. | 1. performic acid applied at short exposures to various kinds of microorganisms known for their resistance shows a strong bactericidal and sporicidal effect. 2. in addition to disinfection of hands and other parts of the body, the preparation could be used for the disinfection of various surfaces and objects. | 1975 | 810511 |
| [differentiation in culture of bacillus species isolated from semicanned meat]. | studied were the cultural, morphological, and biochemical properties of a total of 50 strains of aerobic spore-producing organisms of group i of the genus, bacillus isolated from semicanned meat. comparative investigations were carried out following four procedures (5, 7, 8, 14). fifty per cent of the bacilli studied were determined as bac. licheniformis, 26 per cent -- as bac. subtilis, 20 per cent -- as bac. pumilus, and 4 per cent -- as bac. cereus. data showed that the results obtained can s ... | 1975 | 810942 |
| [occurrence and function of a proteinase inhibitor in the hemolymph of insects]. | the presence of proteinase inhibitor has been proved in the hemolymph of a number of insect species from seven different insect orders. the amount of proteinase inhibitor in the hemolymph significantly increases after injection of inactivated bacteria into the hemocoelom of galleria mellonella-larvae. moreover the larvae show an increased resistance against normally lethal concentrations of trypsin, chymotrypsin, pronase p and extracellular proteinase produced by pseudomonas aeruginosa. it is di ... | 1975 | 811027 |
| death rates of bacterial spores: nonlinear survivor curves. | nonlinear survivor curves were obtained when spores of bacillus cereus were heated in physiological saline solution. curvilinear survivor curves did not appear to be caused by experimental artifacts but by the heterogeneity of spore population with regard to heat resistance. | 1975 | 811340 |
| [demonstration of a single form of alpha-acetohydroxy acid synthetase in bacillus cereus t]. | existence of one form of alpha-acetohydroxyacid synthetase shown by sucrose density gradient ultracentrifugation analysis, and inhibition in vitro by valine studies on the enzyme of bacillus cereus t. | 1975 | 811404 |
| thin-layer chromatographic technique for rapid detection of bacterial phospholipases. | silica gel thin-layer chromatography was employed to detect lecithinase activity induced from bacterial resting cell preparations induced from bacterial resting cell preparations incubated at 37 c for 4 h in the presence of purified egg yolk lecithin. bacillus subtilis, bacillus cereus, serratia marcescens, and pseudomonas aeruginosa hydrolyzed lecithin with the formation of free fatty acids as the sole lipid-soluble product. in none of the escherichia coli and citrobacter freundii strains teste ... | 1975 | 811682 |
| food poisoning from take-away foods. | 1975 | 812070 | |
| comparison of methods for extraction of bacterial adenine nucleotides determined by firefly assay. | adenine nucleotides in escherichia coli, bacillus cereus, klebsiella pneumoniae, staphylococcus aureus, and pseudomonas aeruginosa were extracted using 10 different methods. extracts were assayed for adenosine 5'-triphosphate (atp), adenosine 5'-diphosphate (adp), and adenosine 5'-monophosphate (amp) by the firefly method using an improved procedure. analytical interference by bacterial enzymes not inactivated during the extraction was found to be a major problem. however, these enzymes were ina ... | 1975 | 812422 |
| effect of some inhibitors derived from nitrite on marcomolecular synthesis in bacillus cereus. | the effect of several inhibitors derived from nitrite on incorporation of [14c]uracil into ribonucleic acid of bacillus cereus during outgrowth and vegetative growth has been determined. a heat-induced inhibitor presumably of the perigo type was compared with the nitrosothiols of thioglycolate and beta-mercaptoethanol. all were found to effectively inhibit uracil incorporation at all stages tested. phase-contrast microscopy revealed that inhibition of morphological events occurred either before ... | 1975 | 812424 |
| studies on two isozymes of aconitase from bacillus cereus t. i. partial purification and stability. | 1975 | 812498 | |
| proceedings: interaction of cereolysin and streptolysin o with red blood cell membrane cholesterol. | 1975 | 812839 | |
| surface-localized cortex-lytic enzyme in spores of bacillus cereus t. | 1975 | 812943 | |
| bacillus cereus food poisoning: a provisional serotyping scheme. | a provisional serotyping scheme for bacillus cereus has been developed. eighteen selected cultures of b. cereus isolated from foods and clinical specimens were used to prepare agglutinating sera against the flagellar antigen. there were no significant cross-reactions between the sera. the sera were used to type 137 isolates of b. cereus from 34 british and australian incidents of food poisoning associated with the consumption of cooked rice. the majority of the isolates from samples of food (56 ... | 1975 | 813000 |
| [interrelationship between phage types and biochemical types in bac. cereus cultures isolated from different natural sources]. | 1975 | 813459 | |
| [antibacterial activity of a lysozyme-like enzyme from staphylococci]. | a lysozyme-like enzyme isolated from the culture broth of staph. aureus 712 presented in its native state a lipoproteid complex. the lytic and antibacterial spectrum of the enzyme was similar to that of the egg albumin enzyme. however, the lipoproteid complex was somewhat superior to the egg albumin complex in its activity against micrococcus lysodeikticus, a number of gramnegative bacteria and staphylococci. out of the organisms studied microccus lysodeikticus, sarcina and bac. subtilis proved ... | 1975 | 813563 |
| [mechanism of germination of spores. (2). the role of l-alanine during the early stage of germination]. | 1975 | 814348 | |
| effect of nitrite and erythorbate on growth of bacillus cereus in cooked sausage and in laboratory media. | bacillus cereus spores were inoculated into sausage mass before cooking. the sausages were kept at 20 degrees c for 48 h before the bacteriological and physiochemical analyses were done. a combination of an addition of 200 mg/kg sodium nitrite and 500 mg/kh sodium erythorbate totally prevented the growth of two strains of b. cereus. increasing the amount of erythorbate did not affect the antibacterial properties of the nitrite. the inhibitory effects of different combinations of the additives we ... | 1975 | 816113 |
| [thermodynamic and kinetic characteristics of b.cereus sporal germination]. | 1975 | 823535 | |
| reactivation of the lipid-depleted pyruvate oxidase system from escherichia coli with cell envelope neutral lipids. | the pyruvate oxidase system of escherichia coli is composed of a soluble flavoprotein, pyruvate oxidase (ec 1.2.2.2, pyruvate:ferricytochrome b1 oxidoreductase), and an electron transport system associated with the cell envelope-membrane fraction. the membrane particles contain 15% lipid by weight. fractionation of the lipids revealed that abut one-third are neutral lipids and two-thirds are phospholipids. the relative ratio of ubiquinone to menaquinone within the neutral lipid fraction is 15:1 ... | 1975 | 1100621 |
| relation between various phospholipase actions on human red cell membranes and the interfacial phospholipid pressure in monolayers. | the action of purified phospholipases on monomolecular films of various interfacial pressures is compared with the action on erythrocyte membranes. the phospholipases which cannot hyorolyse phospholipids of the intact erythrocyte membrane, phospholipase c from bacillus cereus, phospholipase a2 from pig pancreas and crotalus adamanteus and phospholipase d from cabbage, can hydrolyse phospholipid monolayers at pressure below 31 dynes/cm only. the phospholipases which can hydrolyse phospholipids of ... | 1975 | 1174576 |
| effect on microorganisms of volatile compounds released from germinating seeds. | volatile compounds evolved from germinating seeds of slash pine, bean, cabbage, corn, cucumber, and pea were evaluated for their ability to support growth of microorganisms in liquid mineral salts media lacking a carbon source. growth of eight bacteria was measured turbidimetrically and of six fungi as dry weight of mycelium. volatiles caused increased growth of pseudomonas fluorescens, bacillus cereus, erwinia carotovora, agrobacterium tumefaciens, a. radiobacter, rhizobium japonicum, mucor muc ... | 1975 | 1201509 |
| [possible relationship between bacterial surface structures, immune-adherence, chemotaxis and phagocytosis (author's transl)]. | in the present study we attempted to determine the relationship between bacterial surface structures, immune adherence, chemotaxis and phagocytosis. as shown in table 1 encapsulated bacteria (klebsiella ozanae, k. pneumoniae, pasteurella multocida, streptococcus pneumoniae), mycoplasma pneumoniae and m. fermentans had a much lower immune adherence-activity than non-encapsulated bacteria (bacillus cereus, brucella abortus, erysipelothrix insidiosa, escherichia coli, listeria monocytogenes, pseudo ... | 1976 | 1258564 |
| phosphatidyl-(n-acyl)-ethanolamine. a lipid component of mammalian epidermis. | a lipid present in the granular cells of mammalian epidermis was identified as phosphatidyl-(n-acyl)-ethanolamine. the structure was deduced from the ratio of phosphorus : nitrogen : glycerol : fatty acid esters : total fatty acid (1 : 0.94 : 0.97 : 2.1 : 2.9), from analyses of the products of alkaline and acid hydrolyses and from its infrared spectrum. conclusive evidence was obtained by a direct comparison of the chromatographic properties, degradation products and infrared spectrum of the iso ... | 1976 | 1268235 |
| bacteriophage and bacteriophage-like structures carried by bacillus medusa and their effect on sporulation. | bacillus medusa was found to carry three phages or phagelike structures named phi med-1, phi med-2, and phi med-3. phi med-1 is a minute, 25-nm-diameter particle without a tail. it was extracted from the sporulation lysate of a phi med-2-minus strain of b. medusa and purified by differential centrifugation. the nucleic acid from this structure was shown to be orcinol positive, alkali sensitive, rnase sensitive, and dnase resistant. an rnase-resistant core of nucleic acid was not found, indicatin ... | 1976 | 1271529 |
| [an episode of alimentary toxinfection caused by bacillus cereus]. | 1976 | 823623 | |
| [antibiotic residues in organs and muscle tissues of broilers. i. bacitracin, flavomycin, spiramycin and viriniamycin residues following administration of diets containing low levels of these antibiotics (author's transl)]. | two groups of broilers were fed two different feed mixtures. a feed containing a mixture of bacitracin, flavomycin, spiramycin and virginiamycin (20 ppm each) was administered to sixity broilers. sixty other broilers were given a similar feed not containing any antibiotics. after slaughter, samples of kidney, liver and breast were examined for the presence of antibiotic residues. all samples were found to be negative for antibiotic residues. four micro-organisms were used in performing the tests ... | 1976 | 823664 |
| effect of ultrasonic waves on the heat resistance of bacillus spores. | the effect of ultrasonic treatment on the heat resistance of bacillus spores differs widely both with the species and the strain tested. ultrasonic waves do not affect the heat resistance of some strains, whereas they greatly reduce that of other strains of the same species. the heat-sensitizing effect of ultrasonic waves is more pronounced when short heating periods are used. ultrasonic treatment does not seem to affect the "z value". | 1976 | 823864 |
| heat-induced requirements for sucrose or magnesium for expression of heat resistance in bacillus cereus forespores. | the addition of 0.6 m sucrose of 0.016 m mg2+ to the enumeration medium was required for early expression of heat resistance (10 min at 70 degrees c) in stage v bacillus cereus forspores. the addition of mg2+ to the sporulation medium did not remove this requirment for sucrose of mg2+. the heat damage did not affect forespore germination or outgrowth, but injured cells in the absence of sucrose or mg2+ were not capable of cell division. the heat-induced sublethal damage apparently affected the f ... | 1976 | 823870 |
| morphological changes in escherichia coli and bacillus cereus caused by external histone. | it was found that the externally added histone changes remarkably both the surface and the internal ultrastructure of cells of escherichia coli. the interaction of histone with surface structures results in thickening of the inner layer of the cell wall. cytoplasm becomes condensed, contains extensive electrontransport zones and neither ribosomes nor the nuclear structure are differentiated. the addition of histone to germinating spores of bacillus cereus decelerates germination and postgerminat ... | 1976 | 824179 |
| identification of a novel enterotoxigenic activity associated with bacillus cereus. | a strain of bacillus cereus isolated from a food poisoning outbreak characterized by vomiting has been shown to be capable of causing vomiting when cultures grown on rice, but not other media, were fed to rhesus monkeys. in contrast, a strain isolated from a diarrhoeal outbreak produced diarrhoea, but not vomiting, when grown on various media in similar feeding trials. furthermore, culture filtrates from the diarrhoeal strain caused fluid accumulation in ligated rabbit ileal loops whereas those ... | 1976 | 824324 |
| studies on the production of enterotoxins by bacillus cereus. | evidence is presented for the existence of three distinct enterotoxins detected in concentrated cell-free culture filtrates of selected bacillus cereus strains. the first was a product capable of stimulating the adenylate cyclase-cyclic-amp system in intestinal epithelial cells and, possibly through this, causing fluid accumulation in ligated ileal sections ("loops") of young rabbits. this was elaborated by a strain isolated from an incident of diarrhoea and which caused diarrhoea in 6 of 10 mon ... | 1976 | 824325 |
| effect of nisin on the germination and proliferation of spores of some aerobic spore-formers in nutrient medium. | 1976 | 824886 | |
| a rapid method for the purification of beta-lactamase from bacillus cereus by affinity chromatography. | 1976 | 824973 | |
| food poisoning outbreak attributed to bacillus cereus. | 1976 | 825214 | |
| the structure of phosphatidyl glycerol prepared by phospholipase d-catalyzed transphosphatidylation from egg lecithin and glycerol. | 1976 | 825236 | |
| highly sensitive determination of bacillus cereus exo-enterotoxin using the method of aggregate haemagglutination. | the possibility has been demonstrated of using the method of aggregate-haemagglutination for the detection of b. cereus exo-enterotoxin in both food products and culture media. it has been established that 0.004 mug/ml of enterotoxin can be detected by this method. the applied antisera to b. cereus enterotoxin did not yield cross reactions with enterotoxins produced by e. coli, cl. perfringens, st. aureus, v. cholerae or sh. dysenteriae. | 1976 | 825572 |
| protection of rats by phospholipase c from bacillus cereus against the effects of intravenous infusions of purified tissue thromboplastin. | infusions of purified tissue thromboplastin in rats cause the accumulation of fibrin and platelets in the lungs and produce marked changes in the platelet count and in the coagulation factors v, vii and viii. tissue thromboplastin in a dose corresponding to less than 2 mug of protein per rat is lethal when given as a bolus injection. simultaneous i.v. administration purified phospholipase c effectively prevents all these changes and protects rats from otherwise lethal doses of tissue thromboplas ... | 1976 | 825958 |
| the folate-mediated synthesis of ribothymidylate in transfer ribonucleic acid, and evidence for multifunctional enzymes in one-carbon metabolism in eukaryotic sources. | 1976 | 826434 | |
| biosynthesis of ribothymidine in the transfer rna of streptococcus faecalis and bacillus subtilis. a methylation of rna involving 5,10-methylenetetrahydrofolate. | the methyl moiety of ribothymidine in the trna of streptococcus faecalis, bacillus subtilis, and probably bacillus cereus is dervied from a 1-carbon folate derivative and not s-adenosylmethionine. micrococcus luteus (m. lysodeikticus) trna appears to be almost devoid of ribothymidine. s. faecalis trna lacking ribothymidine can be methylated in vitro with formation of ribothymidine. 5,10-methylenetetrahydrofolate has been identified as the 1-carbon donor involved in ribothymidine formation in s. ... | 1976 | 826533 |
| [physicochemical characteristics of dna and the amino acid composition of bacillus phages]. | from five bacillus phages nucleic acids were isolated and identified as double-stranded dna of the at-type. their melting point was 85-86.5 degrees c, molecular weight 23.4-43.7x10(6) daltons. the content of dna in phage particles was 39.9-44.0%, the content of protein 55.7-56.1%. the examination of the amino acid composition in phages 125/50 and 617 revealed a low level of serine and the lack of methionine, while the remaining amino acid composition of bacillus phages was close to that of e. co ... | 1976 | 827122 |
| effect of near-ultraviolet radiation on growth and respiration of bacillus cereus t. | 1976 | 827494 | |
| the total structure of cerexin a (studies on antibiotics from the genus bacillus. xvi. | the constituent fatty acid of cerexin a was elucidated to be beta-hydroxy isoundecanoic acid by gas chromatography, mass spectrometry and nuclear magnetic resonance. the asparaginyl asparagine linkage in the amino acid sequence of the antibiotic, which has been previously described, was proved to be a normal alpha-carboxylpeptide bond by dehydration-reduction procedure. the three asparagine residues in the sequence were isolated separately and their chiralities were determined. the structure of ... | 1976 | 827539 |
| the structure of cerexin b (studies on antibiotics from the genus bacillus. xvii). | the structure of cerexin b was examined. the constitutent fatty acids were elucidated by gas chromatography and mass spectrometry to be beta-hydroxy isodecanoic acid, beta-hydroxy decanoic acid, beta-hydroxy isoundecanoic acid and beta-hydroxy anteisoundecanoic acid. the configurations of constituent amino acids were determined as asparagine (2d, 1l), valine (d), phenylalanine (d), allo-threonine (d), tryptophan (d), and allo-isoleucine (d) from their optical activities. treatment with conc. hyd ... | 1976 | 827540 |
| production and isolation of cerexins c and d studies on antibiotics from the genus bacillus. xvii. | from the culture broth of bacillus cereus 60-6, in which antibiotic production was improved a new antibiotic, named cerexin c, was isolated. similarly, a new antibiotic, cerexin d was isolated from the culture broth of bacillus cereus gp-3. cerexins c and d are closely related to cerexins a and b in their physico-chemical and antimicrobial properties. in fact cerexins c and d are peptides essentially identical with cerexins a and b except for the presence of a lysine residue in place of the gamm ... | 1976 | 827541 |
| highly sensitive determination of bacillus cereus exo - enterotoxin using the method of aggregate haemagglutination. | the possibility has been demonstrated of using the method of aggregate-haemagglutination for the detection of b. cereus exo-enterotoxin in both food products and culture media. it has been established that 0.004 mug/ml of enterotoxin can be detected by this method. the applied antisera to b. cereus enterotoxin did not yield cross reactions with enterotoxins produced by e. coli, cl. perfringens, st. aureus, v. cholerae or sh. dysenteriae. | 1976 | 827583 |
| [the effects of weak magnetic fields on bacteria]. | a stationary device was constructed for conducting experiments in a weak magnetic field. a ferromagnetic screen was used to produce in the working volume a magnetic-field of 26 nt. the effect of a weak magnetic field on the following bacteria was studied: e. coli communior, b. prodigiosum, staphylococcus aureus 209, and bac. anthracoides. cultivation of the bacteria in these conditions for a long time resulted in changes of their tinctorial, morphological, cultural, and biochemical properties. | 1976 | 827667 |
| [evaluation of successful chemotherapie of infections of the urinary system by determination of antibacterial activity in the urine (author's transl)]. | 5,589 urin samples from patients with suspected infections of the urinary tract were screened for inhibiting activity against baz. cereus (atcc 6051). in 19% of these urines such inhibitors could be found. in spite of the antibacterial inhibition activity nearly half of the samples had bacteria in high number. by comparison of the various bacterial species in both groups of urin, in those without antibacterial "problem-bacteria": klebsiella-enterobacter- proteus- candida-species is demonstrated. ... | 1976 | 828144 |
| effect of phospholipase c hydrolysis of membrane phospholipids on acyltransferase systems in rat liver microsomes. | three kinds of phospholipase c [ec 3.1.4.3] were used to selectively hydrolyze phospholipids in rat liver microsomes, and their effects on the acyl-coa: glycerophosphate and acyl-coa: lysophospholipids acyltransferase systems were examined. the glycerophosphate acyltransferase [ec 2.3.1.15] system was inactivated rapidly by treatment with phospholipase c of ps. aureofaciens or b. cereus and the loss of activity paralleled the degradation of phosphatidylcholine and phosphatidylethanolamine. the 1 ... | 1976 | 828160 |
| filamentous appendages of bacillus cereus spores. | 1976 | 828210 | |
| studies on megacinogeny in bacillus cereus. i. multiplication of phage wx causing lysogenic conversion to megacin a (phospholipase a) production. | phage wx capable of reconverting bacillus cereus strain w derivatives, cured to lose megacin a (phospholipase a) production into megacin a-producing cultures, exhibits unusual kinetics of multiplication; its clear mutant, phage wxc, behaves similarly. the phages are not adsorbed by stationary phase indicator bacteria. as sonicated bacteria fail to inactivate the phages, the absence of adsorption cannot be attributed to an undersurface localization of the receptors. multiplying bacteria exert a s ... | 1976 | 828440 |
| studies on megacinogeny in bacillus cereus. ii. bacillus cereus isolates characterized by prophage-controlled production of megacin a (phospholipase a). | five out of a number of bacillus cereus strains isolated from soil produced high titre specific bacteriocin (megacin a) in mitomycin c-induced cultures. in the course of cultivation with ethidium bromide, the strains gave off segregants not producing bacteriocin (cin-). the lysate of two wild strains formed plaques on the corresponding cin- bacteria. the two phages (wx23 and wx26) were identical in antigenic structure with phage wx was present in the lysate of b. cereus strain w, and converted c ... | 1976 | 828441 |
| the applications of immobilized enzymes in automated analysis. | 1976 | 828702 | |
| purification & properties of isozymes of glutamate dehydrogenase form bacillus cereus t. | 1976 | 828900 | |
| comparison of two methods for detecting antibiotic residues in slaughter animals. | a comparison was made of the sensitivity of two methods in current use for the detection of antibiotic residues in slaughter animals. calves previously given therapeutic injections of an antibiotic were used and a variety of samples were tested. | 1976 | 828970 |
| inhibition of n5-methyltetrahydrofolate - homocysteine transmethylase by a vitamin b12-antimetabolite. | 1976 | 829218 | |
| death rates of bacterial spores: mathematical models. | the concave survivor curves produced as a result of spore heterogeneity were analyzed to determine whether they were caused by inmate characteristics of the spores or by the acquisition of heat resistance during the heating process. mathematical models developed for the two hypotheses revealed that the concave survivor curve (on semi-log paper) caused by innate heterogeneity is parabolic and that caused by acquired heat resistance is exponential. the mathematical models were applied to several p ... | 1976 | 816439 |
| response of bacillus thuringiensis to bacteriophage cp-51. | bacteriophage cp-51, a transducing phage of bacillus cereus was able to replicate on all eight varieties of bacillus thuringiensis tested. three general plaque types were observed on each strain although one type predominated on each strain. the plaque size was uniform for each strain regardless of plaque type. the bacterial strain used as source of the phage had no effect on plaque type or size found on any host strain. cp-51 was stable in infected spores of b. thuringiensis var. kurstaki for a ... | 1976 | 816441 |
| acquisition of substrate-specific parameters during the catalytic reaction of penicillinase. | the progress of the catalytic reaction of penicillinase (ec 3.5.2.6; penicillin amido-beta-lactamhydrolase) depends on the structure of the side-chain in derivatives of 6-aminopenicillanic acid (the parent substrate). side-chains of one class promote the rate of the reaction and cause no deviation from the linear kinetics observed with the parent compound. by contrast, side-chains of the other class induce a time-dependent, reversible change in the parameters of the catalytic reaction. the rate ... | 1976 | 817286 |
| [bacillus cereus as an etiological factor in food poisoning]. | 1976 | 814606 | |
| gas gangrene-like infection with bacillus cereus in a lymphoma patient. | a patient with a diffuse histiocytic lymphoma developed an infection caused by bacillus cereus during a period of induced granulocytopenia. a fulminant process resembling gas gangrene developed shortly after the accidental penetration by a small piece of metal into his right hand. incision and drainage as well as antimicrobial therapy did not prevent the loss of the third, fourth and fifth fingers; however, localization and subsequent control of the infection was achieved concomitant with bone m ... | 1976 | 814994 |
| [characterization by zymograms of r factor-determined beta-lactamases: plasmids of defined and undefined compatibility groups (author's transl)]. | an easy biochemical method is described, discriminating the beta-lacta-mases coded by various r factors. electrophoretic mobility and substrate affinity of beta-lactamases were studied simultaneously for 7 different penicillins and cephalosporins. they are i like r factors assigned into different compatibility groups (n, p, com6, com7, com8, x and com 9), five r factors isolated from piglets faeces and one r factor, ru1, originated from enterobacter aerogenes. three electrophoretic types of beta ... | 1976 | 786104 |
| [bacterial flora of the conjunctival sac of the horse]. | the aa. report the results of taxonomic research conducted on the conjunctival sac of 59 horses for identification of the present bacterial flora. in the controlled animals, it was observed, at the level of the considered niche, a community constituted of normal bacterial populations, but not autochtonous in the significance they attributed from dubos et al., relative to the characterization of the indigenous microbiota of the intestine. the isolated normal bacterial flora seems to be constitute ... | 1976 | 788654 |
| correlation between changes in the membrane organization and susceptibility to phospholipase c attack induced by atp depletion of rat erythrocytes. | about 20 and 43% of the total membrane phospholipids are hydrolized in fresh rat erythrocytes by treatment with phospholipase c (bacillus cereus), or both sphingomyelinase and phospholipase c, respectively, without causing cell lysis. treatment of atp-depleted cells with phospholipase c alone results in 50% hydrolysis and extensive lysis. depletion of atp causes a marked increase in the aggregation of intramembranous particles accompanied by a similar increase in the smooth area between the part ... | 1976 | 813771 |
| dense growth of aerobic bacteria in a bench-scale fermentor. | escherichia coli b, escherichia coli mre 600, escherichia coli k 12-3300, pseudomonas fluorescens, and aerobacter aerogenes were grown exponentially in a bench-scale fermentor to cell concentrations in the range of 20 to 41 g dry cells/liter at 30 degrees c and 30 to 55 g dry cells/liter at 25 degrees c. the high cell concentrations were achieved in a growth system previously described for growth of escherichia coli w (biotechnol. bioeng., 16, 933 (1974); ibid. 17, 227 (1975)). various enzyme ac ... | 1976 | 813791 |
| inactivation of bacillus cereus beta-lactamase by halogenated isoxazolylpenicillins. | upon preincubation with halogenated isoxazolyl-penicillins, the activity of bacillus cereus beta-lactamase is decreased by a factor proportional to the inhibitor concentration. this inactivation, which concerns essentially the catalytic rate constant of the enzyme, occurs only at or above 37 degrees c with cloxacillin and dicloxacillin, and even at 25 degrees c with flucloxacillin. the dependence of the inactivation rate upon inhibitor concentration is consistent, in the former case, with the oc ... | 1976 | 814004 |
| biological activity of hydroxyanthraquinones and their glucosides toward microorganisms. | five mono- and dihydroxyanthraquinones as well as 12 of their glucosides (both free and acetylated) were tested with six different microbial species using the plate-diffusion method. none of the tested substances was active against escherichia coli, 15 of the 17 substances displayed an activity toward bacillus subtilis, bacillus cereus, candida albicans, saccharomyces cerevisiae and streptomyces aureofaciens. relationships between the substance type and biological activity are discussed. | 1976 | 814068 |
| patterns of spore locations in pairs of bacillus cereus sporangia. | the location patterns, relative to the cross wall, of terminal-to-subterminal bacillus cereus spores were determined in pairs of sporangia. the presence of three types of patterns suggests that spores are randomly located, but medium-dependent variability of the frequency ratios of the patterns strongly suggests that nonrandom localization cannot be discounted. | 1976 | 812863 |
| biochemical effects in bacillus subtilis after treatment with the mycotoxin patulin. | 1976 | 184606 | |
| laboratory diagnosis of foodborne diseases. | many bacterial species are responsible for sporadic cases and outbreaks of foodborne intoxication and infection. the foodborne diseases are classified on the basis of the pathogenetic mechanisms involved into four categories: performed toxin, enterotoxin formed in the colonized small intestine, mucosal invasion (enterocolitis) and mucosal invasion with bacteremia. invasive and toxigenic strains of enteropathogenic escherichia coli are discussed. in vivo test systems for the identification of ent ... | 1976 | 184732 |
| selective utilization of endogenous unsaturated phosphatidylcholines and diacylglycerols by cholinephosphotransferase of mouse lung microsomes. | in the presence of cmp, cholinephosphotransferase of mouse lung microsomes catalyzes the conversion of endogenous phosphatidylcholines into 1,2-diacyl-sn-glycerols and cdpcholine. 2. in this conversion cholinephosphotransferase shows a distinct preference for those molecular species of phosphatidylcholine which contain an unsaturated fatty acid. the enzyme hardly utilizes endogenous depalmitoylglycerophosphocholine as a substrate. 3. membrane-bound 1,2-diacyl-sn-glycerols were also prepared by t ... | 1976 | 184825 |
| fine structure of the baccilus thuringiensis spore. | the thin-sectioned spore of bacillus thuringiensis resembles that of bacillus cereus in fine structure. planar inclusions occur between the exosporium and spore coat and are structured differently from the parasporal crystal outside the exosporium. | 1976 | 185959 |