| studies on theileriidae (sporozoa) in tanzania ix. unidentified bovine theileriae. | two strains of nonpathogenic theileriae, designated as theileria sp. (idobogo) and theileria sp. (mwanza), were isolated from cattle in southern and northern tanzania respectively. they were similar to each other, producing low numbers of t. parva-like macroschizonts and of small piroplasms. both were readily transmitted by rhipicephalus appendiculatus. no serological relationship with t. mutans was found, while serum of some of the recovered animals gave fleeting, low titres in the indirect flu ... | 1977 | 414387 |
| dimethyl sulfoxide as an electron acceptor for anaerobic growth. | the isolation from lake mud of a bacterium which can use dimethyl sulfoxide (dmso) as an electron acceptor for growth is described. the isolate, called strain dl-1, was a small, gram negative, non-motile spiral. the sole product of dmso reduction was dimethyl sulfide (dms). other electron acceptors used by the isolate included sulfite, thiosulfate, elemental sulfur, methionine sulfoxide, tetramethylene sulfoxide, nitrate, and oxygen (microaerophilically). sulfate was not reduced and could not ev ... | 1978 | 414686 |
| studies on a new pathogenic lung fluke--paragonimus hueit'ungensis sp. nov. | | 1977 | 414893 |
| sarcocystis cernae sp. n., relacement name for sarcocystis sp. cerná and loucková, 1976. | | 1977 | 414977 |
| induction of a biopolyester hydrolase (cutinase) by low levels of cutin monomers in fusarium solani f.sp. pisi. | cutin hydrolysate induced the production of an extracellular cutinase by glucose-grown fusarium solani f. sp. pisi. the rate of production depended on the amount of cutin hydrolysate added up to 80 mug/ml, and saturation was attained at this level. glucose was found to be a repressor of cutinase production. a radial immunodiffusion assay for cutinase was developed, and the induction of cutinase by cutin hydrolysate was confirmed by this direct assay. when cutinase was induced by cutin hydrolysat ... | 1978 | 415052 |
| developmental stages of sarcocystis fusiformis (railliet, 1897) and sarcocystis sp., of the water buffalo, in the small intestines of cats and dogs respectively. | | 1977 | 415372 |
| developmental stages of sarcocystis fusiformis (railliet, 1897) and sarcocystis sp., of the water buffalo, in the small intestines of cats and dogs respectively. | | 1977 | 415373 |
| contribution to the problem of cyst-producing coccidians. | the problem of life cycles of cyst-producing coccidians, mainly those of the genus sarcocystis, from carnivorous birds has been discussed. oocysts of the "sarcocystic" type have been recovered from 9 species of birds of prey and owls from czechoslovakia. the course of experimental infection in a group of birds consisting of the species tyto alba, asio otus, strix aluco, buteo buteo has been described. we inoculated these birds with cystic stages of the genus sarcocystis obtained from white labor ... | 1978 | 416999 |
| tetrapeltalonema (t.) mystaxi sp. n. (nematoda: filarioidea) from brazilian moustached marmosets, saguinus m. mystax. | tetrapetalonema (t.) mystaxi sp. n. is described from the subscapular connective tissues of saguinus mystax. the parasite is placed in the subgenus tetrapetalonema and most closely resembles tetrapetalonema atelensis, from which it can be differentiated by its long esophagus, size and shape of the spicules, and the size and arrangement of nuclei in the tail of the microfilaria. | 1978 | 417161 |
| improved glc determination of plasma nitroglycerin concentrations. | a specific and quantitative assay for determining nanogram levels of nitroglycerin in plasma was developed. the method involves stabilization of the drug in plasma with silver nitrate, followed by multiple extraction using purified hexane. isosorbide dinitrate is added as the internal standard. the hexane extract is subsequently concentrated and injected into a glass column packed with 3% sp-2401 on 100--120-mesh supelcoport at 140 degrees. a 63ni-electron-capture detector gives a linear respons ... | 1978 | 417169 |
| human spongiform encephalopathies in marmoset monkeys (saguinus sp.). | brain homogenates (10% w/v) from five of seven kuru patients inoculated intracerebrally (i.c., 0.1 ml) into marmosets (saguinus sp.) induced a rapidly progressive cns disease 26, 31, 36, 76 and 94 months postinoculation. serial marmoset passages of kuru were accomplished by i.c. inoculation of neonatal marmosets with brain homogenates from marmosets with experimentally induced kuru. the incubation periods ranged from 1.5 to 11 months (average 7.3) in 19 animals, 20-25 months in four animals and ... | 1978 | 417327 |
| studies on sarcocystis in malaysia. i. sarcocystis levinei n. sp. from the water buffalo bubalus bubalis. | light and electron microscopic studies and feeding experiments have confirmed the presence of two species of sarcocystis in the water buffalo bubalus bubalis. one is the already known species with large macroscopic sarcocysts, sarcocystis fusiformia (railliet, 1897) bernard and bauche, 1912 and the other is s. levinei n. sp. which is being described in detail. the sarcocysts of s. levinei are 0.9 x 0.1 mm and the zoites in them 17.8 x 4.2 micrometer. ultrastructurally, the primary cyst wall show ... | 1978 | 417481 |
| leucocytozoon smithi: persistence of gametocytes in peripheral turkey blood. | ten-week-old broad-breasted white turkeys were exposed for 2 weeks to a natural infection of leucocytozoon smithi in marlboro and sumter counties in south carolina. the birds were then returned to clemson, south carolina, and housed in pens proofed against black flies (simulium sp.) to prevent any reinfection. blood smears, stained with giemsa's stain, were prepared at regular intervals to determine the presence of gametocytes of l. smithi after a single natural infectional exposure. gametocytes ... | 1978 | 417713 |
| colonization resistance against potentially pathogenic bacteria in hexaflora-associated gnotobiotic mice. | a study of colonization resistance against potentially pathogenic bacteria (escherichia coli and pseudomonas aeruginosa) was conducted in hexaflora-associated gnotobiotic mice. groups of germfree akr mice were swabbed with five bacterial and a single gastrointestinal yeast species: streptococcus faecalis. lactobacillus brevis. staphylococcus epidermidis, enterobacter aerogenes, bacteroides fragilis var. vulgatus, and torulopsis sp. all species became established in the gut in 8 weeks. later thes ... | 1978 | 417787 |
| pathways of assimilation of [13n]n2 and 13nh4+ by cyanobacteria with and without heterocysts. | the principal initial product of metabolism of [13n]n2 and 13nh4+ by five diverse cyanobacteria is glutamine. methionine sulfoximine inhibits formation of [13n]glutamine except in the case of gloeothece sp., an organism with a thick sheath through which the inhibitor may not penetrate. thus, glutamine synthetase appears to catalyze the initial step in the assimilation of n2-derived or exogenous nh4+ by these organisms. [13n]glutamate is, in all cases, the second major product of assimilation of ... | 1978 | 418057 |
| studies on endoparasites of the black bear (ursus americanus) in the southeastern united states. | examination of 53 black bears (ursus americanus) from six states in the southeastern united states revealed at least 17 species of endoparasites, including sarcocystis sp., spirometra mansonoides (spargana), macracanthorhynchus ingens, ancylostoma caninum, arthrocephalus lotoris, baylisascaris transfuga, capillaria aerophila, capillaria putorii, crenosoma sp., cyathospirura sp., dirofilaria immitis, gnathostoma sp., gongylonema pulchrum, microfilariae, molineus barbatus, physaloptera sp. and str ... | 1978 | 418189 |
| parasites of the coyote (canis latrans) in central utah. | seventeen coyotes, canis latrans, from central utah were surveyed for parasites. five species of parasites not reported previously from coyotes in utah were detected: filaroides osleri, physaloptera sp., spirocerca sp., ancylostoma caninum, and cediopsylla simplex. in all, 11 genera of parasites were observed. | 1978 | 418190 |
| [refinement of the diagnosis of the genera and species of methane-using bacteria]. | the diagnoses of taxons have been corrected for methane assimilating bacteria of the family methylomonadaceae leadbetter 1974, of the genera methylomonas leadbetter 1974. methylococcus foster a. davis 1966, methylosinus whittenbury. phillips a. wilkinson 1970, methylocytis whittenbury, phillips a. wilkinson 1970, and of 16 species. the diagnosis of the species methylomonas rubra whittenbury, phillips a. wilkinson 1970 has been completed, and the new species methylomonas gracilis sp. nov. and met ... | 1978 | 418311 |
| [dermatophytosis, pseudo-dermatophytosis and healthy cutaneous portage observed in platyrhini and cynomorpha monkeys (author's transl)]. | the most frequent tinea of the subhuman primates are microsporosis due to microsporum canis or trichophytosis at trichophyton mentagrophytes and t. simii. the t. mentagrophytes, an anthropo-zoophilic species must be differenciated from t. rubrum and t. interdigitale, dermatophytes of the man; due to the importance of that diagnosis in primate mycology, some tests are used for the differenciation. between the 226 monkeys investigated it was registered: 2 trichophytosis at t. mentagrophytes (an on ... | 1977 | 418728 |
| sarcocystis cymruensis n. sp., a parasite of rats rattus norvegicus and cats felis catus. | sarcocystic cymruensis n. sp. is described from wild rattus norvegicus. the parasite, which was maintained cyclically in rats and cats in the laboratory, resembles s. muris but was not infective for laboratory mice. sporocysts were produced by cats within four days, but only in very small numbers. muscle cysts were distinguishable in rats after three months, and grew continuously reacing 5 cm in length at nine months. | 1978 | 418743 |
| blood parasites of sheep in the netherlands. i. anaplasma mesaeterum sp.n. (rickettsiales, anaplasmataceae). | on two occasions an anaplasm was isolated from sheep on the dutch island of ameland. the organism proved to be highly pathogenic for splenectomised sheep; a non-splenectomised animal recovered spontaneously after the packed cell volume had decreased by 40%. treatment with oxytetracycline was effective. its pathogenicity for goats appeared to be low, and the organism was apparently not infective to splenectomised cattle. this anaplasm differs from anaplasma ovis in that less than 30% of the organ ... | 1979 | 419513 |
| stereochemistry of internucleotide bond formation by polynucleotide phosphorylase from micrococcus luteus. | polynucleotide phosphorylase catalyzes the formation of polynucleotides from the sp diastereomer of adenosine 5'-o-(l-thiodiphosphate) adpalphas), whereas the rp diastereomer is a competitive inhibitor. the absolute configuration of the phosphorothioate diester bond in the polymer was determined by copolymerizing adpalpha s, sp isomer with udp and degrading the resulting copolymer with r nase a and spleen phosphodiesterase to give, inter alia, uridine 2',-3'-cyclic phosphorothioate. the latter p ... | 1979 | 420791 |
| controlled cell disruption: a comparison of the forces required to disrupt different micro-organisms. | a cell disrupter has been developed which can measure the forces required to disrupt both eukaryotic and prokaryotic cells. it operates a continuous process and will disrupt both large and small volumes. shear forces are set up when a suspension under laminar flow conditions is released under high pressure through a short orifice. if the applied pressure is altered, the shear forces are simultaneously changed so that the amount of cell disruption can be compared under different known and repeata ... | 1979 | 422681 |
| on the formation of crystal proteins during sporulation in bacillus thuringiensis var. thuringiensis. | the processes of sporulation and crystal formation in bacillus thuringiensis could be desynchronized, using short term temperature shift-up conditions or addition of chloramphenicol at the beginning of sporulation. isolation of a sp-, cr+ mutant, blocked at early stage of sporulation further confirmed that crystal formation can occur in the absence of sporulation. the presence of one of the two antigenic subunits of the crystal protein in chloramphenicol treated cultures and both of them in cult ... | 1979 | 426602 |
| summating potentials in menière's disease. | the summating potentials in response to tonebursts of 2, 4, and 8 khz were studied in a group of 112 patients diagnosed as having menière's disease, and the results were compared with recordings from 27 normal human ears. subdivision of the menière ears into a low-threshold (threshold less than 50 db hl) and a high-threshold group (greater than 50 db hl) proved to be functional in relation to the behaviour of the sp. the data of the low-threshold menière group did not differ significantly from t ... | 1979 | 426725 |
| effects of substance p injected into the substantia nigra. | 1 behavioural and biochemical effects of substance p (sp, 1 to 10 mug) administered in a small volume to discrete areas of the rat's brain were studied by means of a refined microinjection technique.2 sp injected unilaterally into the zona reticulata of the substantia nigra elicited dose-dependent contraversive circling and an increase in dopamine turnover in the ipsilateral striatum. sp applied to the zona compacta or zona lateralis, or to the medial lemniscus, evoked ipsiversive turning with a ... | 1979 | 427315 |
| corynebacterium pseudogenitalium sp. nov. commensals of the human male and female urogenital tracts. | antisera to corynebacterium genitalium types c-1 to c-6 were prepared in rabbits and the titers of complement fixing antibodies to the homologous strains, to the heterologous strains, to c. genitalium types i to v, and to the reference species corynebacterium xerosis and corynebacterium minutissimum ascertained. five types stimulated low levels of cross-reacting antibodies to all corynebacteria tested including type c-3. in contrast the antiserum to type c-3 had antibodies to only two heterologo ... | 1979 | 429123 |
| urinary tract infection induced by intermittent urethral catheterization in dogs. | sterilized and unsterilized catheters were passed into the urinary bladders of 9 clinically normal adult male dogs once daily for 5 consecutive days, and the dogs were examined for up to 30 days to determine whether urinary tract infections developed. two dogs that were catheterized with clean unsterilized catheters (1 clinically normal dog and 1 dog given immunosuppressant drugs) developed persistent cystitis and pyelonephritis due to infection with proteus sp. one dog given immunosuppressant d ... | 1979 | 429232 |
| dermatitis associated with cheyletiella infestation in cats. | cheyletiella sp mites were isolated from 8 cats with pruritic dermatitis characterized by erythematous papules or increased scaling. lesions cleared after treatments with malathion (dips) or pyrethrin (shampoos). | 1979 | 429234 |
| crude oil utilization by fungi. | sixty fungal isolates, 34 obtained by a static enrichment technique from soils of northern canadian oil-producing areas and 26 from culture collections, were screened for their ability to grow on n-tetradecane, toluene, naphthalene, and seven crude oils of varying composition. forty cultures, including 28 soil isolates, were capable of growth on one or more crude oils. the genera most frequently isolated from soils were those producing abundant small condida, e.g. penicillium and verticillium sp ... | 1979 | 436012 |
| further studies of a new pathogenic mycobacterium (m. haemophilum sp. nov.). | mycobacterium haemophilum is an acid-fast rod-shaped organism, originally isolated from deep subcutaneous granulomata of a patient with hodgkin's disease. like the other two mycobacterial skin-pathogens, m. ulcerans and m. marinum, m. haemophilum has a maximum temperature for growth below 37 degrees c. mycobacterium haemophilum is distinguished from all other species examined by its requirement of haemin for growth and its complete lack of catalase activity. extraneous catalase cannot replace ha ... | 1979 | 436017 |
| populations of the spinach wilt pathogen, fusarium oxysporum f. sp. spinaciae, in the root tissues, rhizosphere, and soil in the field. | populations of fusarium oxysporum f. sp. spinaciae in root tissues and rhizosphere soil of diseased spinach plants were higher than in the root tissues and rhizosphere soil of healthy plants. populations in soil rhizosphere were higher than in nonrhizosphere soil. the fungus populations were very low in the root tissues of the nonsusceptible strawberry, broccoli, chinese cabbage, and mustard grown in the infested field. the populations were low at the beginning of the season, increased, and rema ... | 1979 | 436018 |
| case report: six cases of verminous pneumonia (muellerius sp.) in goats. | six cases of verminous pneumonia in goats due to muellerius sp. were reviewed. in only one case was the pneumonia diagnosed antemortem. the gross necropsy findings and histopathology revealed a widespread interstitial pneumonia in all the cases. there was variability in the local reaction around the parasites from almost none in the mildest cases to larger focal accumulations of macrophages and mononuclear inflammatory cells. only in the severest cases were eosinophils seen and even then were sc ... | 1979 | 436107 |
| dissolution of a struvite nephrolith in a dog. | a large radiodense calculus in the left renal pelvis of a 22-month-old, male great dane disappeared one month following surgical removal of two struvite (magnesium ammonium phosphate) calculi from the right renal pelvis. the dog's urine likely became undersaturated with struvite for a sufficient period to permit dissolution of the renal calculus. several factors may have contributed to the decrease in urine struvite concentration, including eradication of a urease-producing proteus sp from the u ... | 1979 | 438042 |
| anaerobic organisms in postoperative wounds. | a survey of the bacteria found in postoperative wounds was undertaken during a 14-month period. the yields of aerobic and anaerobic bacteria in 65 appendicectomy wounds were compared; 42 wounds yielded aerobes and 51 anaerobes. seventy-eight other operation wounds yielded anaerobes, and, overall, 33 wounds yielded anaerobes only. bacteroides sp were the most common anaerobic organisms isolated from all operation sites except the lung. | 1979 | 438344 |
| human babesiosis on nantucket island, usa: description of the vector, ixodes (ixodes) dammini, n. sp. (acarina: ixodidae). | | 1979 | 439119 |
| [comparative cytology of methanosarcina and a description of methanosarcina vacuolata n. sp]. | | 1979 | 440161 |
| [vertical distribution and the characteristics of the species composition of the microorganisms of some stratified lakes in estonia]. | the total number, vertical distribution, and special composition of microorganisms from three stratified lakes in the south-eastern estonia containing hydrogen sulfide and ferrous iron were studied in march, 1976. the number of bacteria was lowest in surface water samples (1.2-1.9 x 10(6) cells/ml). it increased first in the zone where oxygen disappeared (2.4-7.6 x 10(6) cells/ml), then slightly decreased, and again increased near the bottom where it became maximal (3.7-14.0 x 10(6) cells/ml). t ... | 1979 | 440169 |
| campylobacter enteritis associated with consumption of unpasteurised milk. | in october and november 1978 two outbreaks of enteritis occurred in the north of england. symptoms lasted two to over eight days but in no case necessitated admission to hospital. faecal specimens from most of the patients were found to contain thermophilic campylobacter sp. inquiry disclosed that all patients had consumed unpasteurised milk from local farms. examination of rectal swabs from the cattle concerned and milk socks yielded strains of campylobacter sp indistinguishable from those isol ... | 1979 | 444995 |
| isolation of pathogenic treponemes from hare. | a presumably new species of pathogenic treponemes was isolated from a lesion on the male organs of hare (lepus sp.) and the scrotum of a rabbit (oryctolagus sp.) was infected with this treponeme. lesion developed on the scrotum after a 110-day incubation. | 1979 | 446601 |
| an anticomplementary agent, k-76 monocarboxylic acid: its site and mechanism of inhibition of the complement activation cascade. | a monocarboxylic acid derivative (k-76 cooh) of k-76, purified from the culture filtrate of stachybotrys complement i nov. sp. k-76, inhibits complement (c) activity. its inhibitory action is mainly on c5 step. it strongly inhibits the generation of eac1,4b,2a,3b,5b from c5 and eac1,4b,2a,3b, and accelerates the decay of eac1,4b,2a,3b,5b. it also causes some inhibition of the reactions of the reactions of c2,c3,c6,c7 and c9 with their respective preceding intermediate cells. it has no effect on ... | 1979 | 448130 |
| observations on the subgenus argas (ixodoidea: argasidae: argas). 17. argas (a.) polonicus sp. n. parasitizing domestic pigeons in krakow, poland. | argas (a.) polonicus sp. n. is described from males, females, nymphs, and larvae from the steeple tower of st. mary's church, karkow, poland, where it feeds on domestic rock pigeons, columba livia gmelin. this species is related to the widely distributed eurasian a. (a.) vulgaris filippova and to certain other species of the eastern area of the palearctic faunal region; it differs distinctly from a. (a.) reflexus (fabricius) of western europe. comparative study under the light microscope. and es ... | 1979 | 448591 |
| studies on encystment of echinostoma revolutum cercariae. | cercariae of echinostoma revolutum encysted in the kidney of the snail physa heterostropha within 1 hr and on mucus trails from helisoma trivolvis, p. heterostropha and lymnaea sp. within 2 hr. significantly, more normal cysts were formed in mucus of helisoma than in mucus of physa or lymnaea. optimal, in vitro encystment occurred within 24 h in either locke's 1 : 1 or locke's 1 : 1 + 1% glucose. significantly more normal cysts occurred in the locke's 1 : 1 medium. both normal and abnormal cyst ... | 1979 | 448597 |
| leishmania herreri sp. n. from sloths and sandflies of costa rica. | leishmania herreri sp. n. is described after isolation in pure culture from blood, viscera and skin of two-toed (choloepus hoffmanni) and three-toed (bradypus griseus) sloths from costa rica. also, it was isolated from the following sandflies: lutzomyia trapidoi, l. ylephiletor and l. shannoni. the amastigote forms were not seen in the final hosts but they were obtained in tissue culture at 33 c. both promastigotes and amastigotes failed to infect hamsters. the new parasite is isolated frequentl ... | 1979 | 448612 |
| apteragia pursglovei sp. n. (trichostrongyloidea: trichostrongylidae) from the white-tailed deer, odocoileus virginianus. | two species of apteragia were found in white-tailed deer (odocoileus virginianus) from 152 counties in 13 southeastern states. specimens previously reported as skrjabinagia odocoilei were reidentified as belonging to 2 similar species of the genus apteragia, a. odocoilei, and a. pursglovei sp. n. apteragia pursglovei sp. n. is differentiated primarily by the length, conformation, and degree of sclerotization of the spicules. of the 824 deer, a. odocoilei occurred in 76.5%, a. pursglovei in 13.8% ... | 1979 | 448613 |
| bacteriology and treatment of chronic otitis media. | tympanocentesis was performed in 50 patients with chronic otitis media. pus was cultured aerobically and anaerobically. aerobes only were isolated from 21 patients, 3 had only anaerobes (peptococcus sp.) and 26 had both aerobes and anaerobes. there were 68 aerobic isolates. pseudomonas aeruginosa was recovered in 36 (72%). other aerobes commonly recovered included proteus sp. and staphylococcus aureus. there were 48 anaerobes isolated. anaerobic gram positive cocci were isolated in 24 instances. ... | 1979 | 449555 |
| [action of polyene antibiotics on actinomycetes with a varying lipid makeup]. | the effect of polyenic antibiotics, such as nystatin, levorin, amphotericin b and mycoheptin on 93 representatives of various species of the ray fungi was studied. it was shown that resistance of the actinomycetes to the polyens was connected with the absence or insufficient content of sterols (0.001--0.008 per cent in the dry mycelium). on addition of cholesterol to the nutrient media (100 microgram/ml) it was included into the membranes of some cultures and their sensitivity increased 2--60 ti ... | 1979 | 453793 |
| metabolism of 3-chloro-, 4-chloro-, and 3,5-dichlorobenzoate by a pseudomonad. | pseudomonas sp. wr912 was isolated by continuous enrichment in three steps with 3-chloro-, 4-chloro-, and finally 3,5-dichlorobenzoate as sole source of carbon and energy. the doubling times of the pure culture with these growth substrates were 2.6, 3.3, and 5.2 h, respectively. stoichiometric amounts of chloride were eliminated during growth. oxygen uptake rates with chlorinated benzoates revealed low stereospecificity of the initial benzoate 1,2-dioxygenation. dihydrodi-hydroxybenzoate dehydro ... | 1979 | 453823 |
| production of 3-acetoxyscirpene-4,15-diol from anguidine (4,15-diacetoxyscirpene-3-ol) by fusarium oxysporum f.sp. vasinfectum. | growing cells of fusarium oxysporum f.sp. vasinfectum (atcc 7808) formed 3-acetoxyscirpene-4,15-diol from anguidine (4,15-diacetoxyscirpene-3-ol) by way of the intermediates triacetoxyscirpene, 3,4-diacetoxyscirpene-15-ol and 3,15-diacetoxyscirpene-4-ol. the new 3-acetoxy analog was found to be less active than anguidine and the other monoacetoxy derivatives when tested against a series of fungal strains and against hela cells in vitro. | 1979 | 453837 |
| isolation and characterization of the trypsin inhibitors from winged bean seed (psophocarpus tetragonolobus (l) dc.). | the trypsin inhibitors from winged bean seed were isolated by affinity chromatography on trypsin-sepharose 4b and the components fractionated by chromatography on sp-sephadex c-25 and sephadex g-100. the major components, inhibitors 2 and 3 were found to be homogeneous proteins with molecular weights of about 20,000. the inhibitors stoichiometrically inhibited bovine trypsin in the molar ratio of 1 : 1 whereas the inhibition of bovine alpha-chymotrypsin was weak and non-stoichiometric. amino aci ... | 1979 | 454647 |
| neuroleptic and dopamine receptors: autoradiographic localization of [3h]spiperone in rat brain. | rats were administered [3h]spiperone (sp: spiroperidol) by tail vein injection and 2 h later the brain was processed for light microscopic autoradiography. high densities of autoradiographic grains were found in all areas known to have a dopaminergic innervation, including the olfactory tubercles, nucleus accumbens, nucleus caudate-putamen, lateral septum, zona incerta, nucleus subthalamicus, arcuate nucleus, nucleus of the central amygdala, areas in the ventral tegmentum and the claustrum. ther ... | 1979 | 455088 |
| nitrogen fixation by rhizobium sp. 32h1. a morphological and ultrastructural comparison of asymbiotic and symbiotic nitrogen-fixing forms. | the induction of nitrogenase (c2h2) activity in asymbiotically cultured rhizobium sp. 32h1 was found to be associated with morphological changes in the cells which were more pronounced than those seen in bacteroids. polyphosphate granules were found in both bacteroids and cultured cells, but poly-beta-hydroxybutyrate vesicles were almost absent in bacteroids but were present in cultured cells. freeze-etching techniques revealed no differences between the asymbiotically cultured nitrogen-fixing f ... | 1979 | 455150 |
| [antibacterial activity of zearalenone]. | zearalenone, a mycotoxin secreted by fusarium sp. and gibberella zeae, shows a narrow range of antibacterial activity limited to some gram-positive aerobic spore-forming bacteria. in bacillus thuringiensis (berliner), a highly sensitive species, this activity is characterized by a decrease of cellular division and induction of atypical cells. these effects resemble those obtained with two other mycotoxins which possess a lactone structure: aflatoxin b1 and patulin. | 1979 | 455155 |
| formation of dl-alanine by corynebacterium sp. 9366-ems/270. | after a 4-d cultivation in a medium containing 7.5% glucose, 0.6% ammonium nitrate and 0.5% peptone, the leaky mutant corynebacterium sp. 9366-ems/270 stimulated in its growth by arginine, was found to accumulate 12.2 g dl-alanine per litre medium. | 1979 | 456949 |
| production of a mutagen from ponceau 3r by a human intestinal anaerobe. | ponceau 3r was reduced in vitro by fusobacterium sp. 2, a human intestinal anaerobe, to a product which is mutagenic when metabolically activated by liver s9 preparations in the salmonella/mammalian-microsome mutagenicity test. this mutagenic metabolite has been identified as 2,4,5-trimethylaniline. | 1979 | 457255 |
| capsimycin, a new antibiotic. i. production, isolation and properties. | capsimycin is a new antifungal antibiotic produced by a strain of streptomyces sp. c 49--87. the active substance in the fermented broth was isolated by solvent extraction followed by silica gel column chromatography. the antibiotic melts at 186 degrees c (decomp.) and has a molecular formula c30h40n2o6. it exhibits marked inhibitory activity against phytophthora capsici (leaf blight disease of cucumber) and pythium debaryanum (damping-off disease of cucumber). | 1979 | 457581 |
| strigeoid trematodes of malaysia with descriptions of a new genus and three new species. | six species of strigeoid trematodes are reported from malaysia. one new genus and 3 new species are described: apatemon (apatemon( jamesi sp. n (strigeidae); cercaria cotylurus sullivani sp. n. (strigeidae); neodiplostomum (neodiplostomum) sp. (diplostomatidae); fibricola ramachandrani (diplostomatidae); pseudoscolopacitrema otteri gen. n. et sp. n. (diplostomatidae); and cercaria cyathocotyle malayi sp. n. (cyathocotylidae). the life cycles of a. jamesi and c. malayi have also been investigated ... | 1979 | 458132 |
| dunnifilaria dilli sp. n. (nematoda: filarioidea) from rattus koratensis in thailand. | dunnifilaria dilli, a new species of filariid from rattus koratensis from thailand is described. adult worms were recovered from the lymphatic system. they differ from d. ramachandrani in their location in the host, the tail length, the shape of the spicules, and in the number of caudal papillae. microfilariae are much smaller and unsheathed. additional hosts include r. rattus and r. sabanus. | 1979 | 458135 |
| poikilotherms as reservoirs of q-fever (coxiella burnetii) in uttar pradesh. | water snakes (natrix natrix), rat snakes (ptyas korros), cobras (naja naja), pythons (python molurus), tortoises (kachuga sp.), plankton fish (cirrhina mrigala), frogs (rana tigrina), toads (bufo sp.) and monitors (varanus indicus) were screened for evidence of q-fever infection by the capillary agglutination test on sera to detect antibodies and/or by attempts to demonstrate coxiella burnetii in spleen and liver samples. sero-reactors were observed among water and rat snakes, pythons and tortoi ... | 1979 | 459042 |
| topographical distribution of substance p in the cat substantia nigra. | the substance p (sp) content in cat substantia nigra (sn) was estimated by radioimmunoassay in microdiscs punched on successive frontal sections. only slight differences were seen in the regional distribution of sp within the sn. the highest content was found in the pars reticulata (20.7 pmol/mg protein) which was two times higher than in the pars compacta and pars lateralis. identical results were found in the right and left part of the sn. out of this area, as pedunculus cerebri and zona incer ... | 1979 | 460695 |
| the interaction of enkephalins with substance p on vascular smooth muscle. | interactions between sp and the enkephalins have bben reported in the cns, and the possibility of a more peripheral site of interaction has now been investigated. sp (10(-6) - 10(-4) g/ml) induced dose-related contractions of the rabbit isolated aorta, which were resistant to alpha-adrenoceptor blockade (phentolamine, 5 x 10(-6) g/ml). neither met- nor leu-enkephalin had any intrinsic action on the aorta, but met-enkephalin at 5 x 10(-6) g/ml significantly inhibited responses to sp but not to ne ... | 1979 | 461950 |
| nonpneumonic, short-incubation-period legionellosis (pontiac fever) in men who cleaned a steam turbine condenser. | pontiac fever affected ten men who had cleaned a steam turbine condenser with compressed air. previous epidemics of pontiac fever and legionnaires' disease--both caused by legionella pneumophila (proposed sp. nov.)--involved "airborne spread" from air-conditioning cooling towers or evaporative condensers. aerosols of contaminated water in heat-rejection systems appear to be important sources of epidemic legionellosis. | 1979 | 462175 |
| two forms of trehalase activity in mice. | trehalase activities from mouse serum and kidney have been compared on ion exchange chromatography (deae-cellulose and sp-sephadex). the two activities showed a distinct behaviour. this was confirmed by polyacrylamide gel electrophoresis and thermal lability, suggesting the presence of at least two forms of the hydrolytic enzyme trehalase in mice. | 1979 | 464396 |
| antimicrobial susceptibilities of rough, smooth, and mucoid colony types of pseudomonas isolated from cystic fibrosis patients. | minimal inhibitory concentrations of carbenicillin, chloramphenicol, tetracycline, gentamicin, tobramycin, and trimethoprim-sulfamethoxazole were determined for rough, smooth, and mucoid pseudomonas sp. isolates from sputa collected from 40 cystic fibrosis patients. ninety-four percent of the minimal inhibitory concentrations obtained by using mixed inocula of colonies of different morphological types fell within one serial dilution of the most resistant minimal inhibitory concentration obtained ... | 1979 | 464580 |
| the influence of red blood cells on the effects of aspirin or sulphinpyrazone on platelet adherence to damaged rabbit aorta. | the effects of acetylsalicylic acid (asa; aspirin) or sulphinpyrazone (sp) on the adherence of washed rabbit platelets to the subendotheilial surface of an everted aorta mounted on a probe or to the subendothelial surface of a rabbit aorta attached to a perfusion apparatus were examined. asa had no effect on platelet adherence to a damaged aorta perfused with a suspension of washed platelets in a medium containing 10% red blood cells (rbc); sp was slightly inhibitory at high concentration. when ... | 1979 | 465372 |
| the effect of raising the scala tympani potassium concentration on the tone-induced cochlear responses of the guinea pig. | scala tympani (st) in guinea pig was perfused with modified ringer's solutions containing 5--50 mm potassium; tone-induced cochlear responses from the basal turn of st were compared before, during and after perfusions. the compound nerve action potential (n1) and afterpotential (a/p) amplitudes were reduced, especially above 20 mm; the summating potential (sp) was variable, but its onset shape changed consistently with 13--20 mm levels. however, the cochlear microphonic amplitude (cm) remained s ... | 1979 | 467537 |
| effect of bacterial polysaccharides on the growth of gaeumannomyces graminis var. tritici and wheat roots. | agrobacterium sp. and related species which in the soil and in the rhizosphere of wheat accompany the fungus gaemannomyces graminis var. tritici and cause take-all of the wheat roots produced polysaccharides in pure cultures (glucans, mannoglucans and galactomannoglucans). these polysaccharides were utilized better by the mycelium of g. graminis than glucose and polysaccharides of plant origin that occurred on the surface of wheat roots (the so-called mucigel). at lower concentrations these bact ... | 1979 | 468081 |
| purification and n-terminal amino acid sequence determination of anionic and cationic canine trypsinogens. | anionic and cationic canine trypsinogens were purified from pancreatic juice by affinity chromatography with trasylol coupled to sepharose 4b followed by ion exchange chromatography with sp-sephadex c-50. automatic n-terminal amino acid sequence determination showed the following structures for the activation peptides: thr-pro-thr-asp-asp-asp-asp-lys for anionic trypsinogen, and phe-pro-ile-asp-asp-asp-asp-lys for cationic trypsinogen. | 1979 | 468111 |
| ps-5, a new beta-lactam antibiotic. i. taxonomy of the producing organism, isolation and physico-chemical properties. | antibiotic ps-5 is a new beta-lactam antibiotic isolated from fermentation broths of streptomyces sp. strain a271. the strain was considered to be a new subspecies of streptomyces cremeus and the name, streptomyces cremeus subsp. auratilis, was proposed. fermentative production, isolation and physico-chemical properties of ps-5 are described. | 1979 | 468714 |
| preliminary crystallographic study of omega-amino acid: pyruvate aminotransferase from pseudomonas sp. f-126. | | 1979 | 469940 |
| [crocoite reduction by a culture of pseudomonas chromatophila sp. nov]. | two cultures of chromium reducing bacteria have been isolated from samples of water accumulated at the bottom of an open-cut chromium deposit and from industrial sewage. the cultures were found to be identical. the cultures are described and their taxonomical position is discussed. they have been classed as psuedomonas chromatophila sp. nov. the cultures reduce cr(vi) from crocoite pbcro4 to cr(iii). a possibility of chromium reducing bacteria being involved in the conversion of crocoite to chro ... | 1979 | 470636 |
| gap junctional vesicles in the neural tube of the splotch (sp) mutant mouse. | the lumbosacral region of the neural tube was studied by means of transmission electron microscopy in retrospectively confirmed normal (+/+; sp/+) and abnormal (sp/sp) embryos of the splotch mutant mouse early on the ninth day of gestation when the caudal neural groove is normally in the process of closing to form the neural tube. in abnormal embryos, a consistent feature is the presence of gap junctional vesicles, particularly in the region of the neural groove which subsequently fails to close ... | 1979 | 473084 |
| a new species of leishmania parasite from the venezuelan andes region. | a new form of leishmania is described from the venezuelan andes region. l. garnhami n.sp. is proposed for this parasite with amastigote stages showing a peculiar and unique organelle seen with light and electron microscope. it produces cutaneous lesions in people living at a height of between 800 and 1,8000 m. in urban and rural areas; the disease is associated with lutzomyia townsendi, the main anthropophilic sandfly in the region. the parasite is easily inoculable into hamsters and grows slowl ... | 1979 | 473325 |
| faecal pollution of surface waters in jakarta. | profuse numbers of enterobacteriaceae were found in samples of surface waters from the ciliwung river and adjoining canals which criss-cross metropolitan jakarta and are used widely for domestic purposes by the poorer sections of its population. 15 of the 20 specimens gres e. coli, klebsiella were isolated from seven and citrobacter from four. using enrichment culture procedures, salmonella sp. were grown from 10 (48%) of 21 water samples examined, and 12 (63%) of aquatic sediments collected at ... | 1979 | 473327 |
| the production in bovine calves of a disease resembling paratuberculosis with a mycobacterium sp isolated from a woodpigeon (columba palumbus l). | | 1979 | 473520 |
| nitrogen fixers in the rhizosphere of certain desert plants. | six species of common desert range plants; achillea sp., aristida plumosa, artemisia herba-alba, haloxylon articulatum, and heliotropium ramosissimum were colleted from western desert in iraq. counts of azotobacter spp. and total bacteria were estimated in both rhizosphere and non-rhizosphere soils. biomass and total nitrogen content of the plants were determined. the r/n ratio (ratio between rhizosphere to non-rhizosphere) for azotobacter sp. ranged between 1 to 19.5 with an average of 4.96. th ... | 1979 | 473956 |
| the effect of temperature and age of strains of fusarium oxysporum on its enzymatic activity. | the activities of pectin-methyl-esterase, polygalacturonase, cellulase, amylase, saccharase, and protease of strains of fusarium oxysporum (schlecht.) f.sp. pisi (linford) were studied. the selected strains showed different symptoms and different degrees of pathogenicity on the host plant. the measurements were performed during the growth of strains at constant temperatures and, in another experiment, on the day at different temperatures at which the individual strains were grown. activities wer ... | 1979 | 473966 |
| different manifestations of the pathogenity of some strains of fusarium oxysporum f. sp. pisi. | different cultivation and morphology characteristics were found in 10 monospore isolates of fusarium oxysporum f. sp. pisi, obtained from yellowing and wilting plants of pea (pisum sativum l.). the isolates of the fungus were obtained from distant geographical regions of czechoslovakia and from various cultivars and hybrids of pea. after inoculation of roots, followed by constant conditions of incubation of the meteor and jupiter cultivars having their origin at the plant-breeding station at luz ... | 1979 | 473967 |
| rapid antimicrobial susceptibility test using tetrazolium reduction. | a rapid method of antimicrobial susceptibility testing has been developed, which uses a modified microdilution procedure and an inoculum of 10(7) bacteria per ml. results are determined within 4 h with an indicator consisting of 2(p-iodophenyl)-3(p-nitrophenyl)-5-phenyltetrazolium chloride. the precipitation of a red formazan by bacteria uninhibited by antimicrobials is accelerated by the addition of phenazine methosulfate. isolates are classified as resistant, indeterminate, or susceptible, bas ... | 1979 | 475361 |
| effect of oxygen on batch and continuous cultures of a nitrogen-fixing arthrobacter sp. | growth, acetylene reduction, and respiration rate were studied in batch and continuous cultures of arthrobacter fluorescents at different oxygen partial pressures. the optimum po2 values for growth and acetylene reduction were 0.05 and 0.025 atm, respectively, but microorganisms can tolerate higher po2 values. the growth of cultures provided with combined nitrogen was dependent on oxygen availability, and strict anaerobic conditions did not support growth. acetylene reduction of a population gro ... | 1979 | 476551 |
| bacterial utilization of a hydrazine derivative as nitrogen source for growth. | the ability of microbes to metabolize the n--n bond seems rare. pseudomonas sp. from soil can utilize 1,4,5,6-tetrahydro-6-oxo-3-pyridazinecarboxylic acid as c and n source. this appears to be the first report that a microbe can cleave a nitrogen--nitrogen bond in an organic compound and use the products for growth. | 1979 | 476556 |
| the site of inhibition of cell wall synthesis by 3-amino-3-deoxy-d-glucose in staphylococcus aureus. | the inhibition of growth and cell wall synthesis by 3-amino-3-deoxy-d-glucose (3-ag), which is known to be one of the constituents of the kanamycin molecule and a metabolite of bacillus sp., was almost completely overcome by glucosamine and n-acetylglucosamine in staphylococcus aureus but scarcely affected by d-glucose and d-fructose. the antibiotic did not inhibit the incorporation of [14c]glucosamine and [3h]n-acetylglucosamine into the acid-insoluble fraction, but rather enhanced the incorpor ... | 1979 | 479118 |
| subcellular localization of complex carbohydrates in rat macrophages and monocytes. | methods for visualization of complex carbohydrates ultrastructurally were employed to study specific organelles of the rat monocyte and macrophage. vicinal glycols of glycoconjugates were demonstrated with the periodic acid-thiocarbohydrazide-silver proteinate (pa-tch-sp) postembedding sequence and acid groups were delineated by the dialyzed iron (di) and high iron diamine (hid) preembedding techniques. lysosomal bodies were generally found reactive with all three methods, although those of mono ... | 1979 | 479562 |
| characteristics of a lipolytic and fatty acid-requiring butyrivibrio sp. isolated from the ovine rumen. | a naturally occurring fatty acid-requiring butyrivibrio sp. (strain s2), isolated from the ovine rumen, deacylates plant galactolipids, phospholipids and sulpholipids to obtain sufficient fatty acid for growth. growth in vitro was promoted by adding to the growth medium a single straight-chain saturated fatty acid (c13 to c18) or vaccenic acid. palmitoleic and oleic acids also supported growth but gave lengthy lag phases probably due to their toxicity. linolenic and linoleic acids supported good ... | 1979 | 479833 |
| influence of oxygen tension on nitrate reduction by a klebsiella sp. growing in chemostat culture. | at dissolved oxygen tensions of 15 mmhg (2 kpa) and below, nitrate-limited continuous cultures of klebsiella k312 synthesized nitrate reductase (nr) and nitrite reductase (nir) and excreted ammonia. under anaerobic conditions over 60% of the nitrate-nitrogen utilized was excreted as ammonia. in contrast, carbon-limited cultures excreted nitrite at dissolved oxygen tensions of 15 mmhg or below and synthesized nr but not nir. ammonia repressed neither nr nor nir synthesis. these observations indic ... | 1979 | 479838 |
| opposite effects of naloxone on substance p-induced changes in brain dopa synthesis and in locomotor activity in rats. | intracerebroventricular injection of substance p (sp) enhanced the synthesis of dopamine and noradrenaline (measured as increase in dopa formation after inhibition of the aromatic l-amino-acid decarboxylase) in rat brain. these biochemical effects were blocked in most brain regions by pretreatment with naloxone. sp also induced vasodilation, salivation and increased locomotor activity. these effects were not antagonized, but, in the case of locomotor activity, potentiated by naloxone. the data s ... | 1979 | 479872 |
| studies on the onchocerca (nematoda: filarioidea) found in cattle in the united states. i. systematics of o. gutturosa and o. lienalis with a description of o. stilesi sp. n. | onchocerca gutturosa and o. lienalis are redescribed and comparative morphological descriptions provided. in addition, a third species of onchocerca is described from cattle in the united states. this third species, onchocerca stilesi sp. n., localizes in the connective tissues around the stifle joint, and can be distinguished morphologically from o. gutterosa and o. lienalis. onchocerca gutturosa and o. lienalis apparently have widespread distribution in the eastern united states; however o. st ... | 1979 | 480066 |
| eimeria azul sp. n. (protozoa: eimeriidae) from the eastern cottontail, sylvilagus floridanus, in pennsylvania. | eimeria azul sp. n. is described from the cottontail rabbit, sylvilagus floridanus, in central pennsylvania. the oval oocysts are 19.5--27.0 micrometer by 15.0--19.0 (mean - 22.9 x 16.7 micrometer). the fusiform sporocysts are 7.8--14.0 micrometer by 3.3--6.5 micrometer (mean = 11.8 x 5.8 micrometer). a stieda body is present. there is no micropyle, oocyst residuum or polar granule. the sporocyst has a residuum which is variable in appearance. the oocysts are characterized by a blue tint when vi ... | 1979 | 480068 |
| a malarial parasite of australian skinks, plasmodium mackerrasae sp. n. | plasmodium mackerrasae sp. n. parasitizes the australian lizards egernia cunninghami and e. striolata (sauria: scincidae). described from an experimental host, e. whitei, it produces mature schizonts containing 6--12 nuclei arranged peripherally as a rosette, and round to oval gametocytes which are equal to or slightly smaller than host cell nuclei. both schizonts and gametocytes parasitize all cells in the erythrocyte series. presence of pigment in both asexual and sexual stages is correlated w ... | 1979 | 480071 |
| coccidia of wombats: correction of host-parasite relationships. eimeria wombati (gilruth and bull, 1912) comb. nov. and eimeria ursini supperer, 1957 from the hairy-nosed wombat and eimeria arundeli sp. n. from the common wombat. | coccidial oocysts morphologically consistent with eimeria ursini supperer 1957, and e. tasmaniae supperer 1957 were recovered from the feces of wild and captive hairy-nosed wombats (lasiorhinus latifrons) in australia. eimeria arundeli so. n. was recovered from the feces of wild and captive common wombats (vombatus ursinus). eimeria arundeli oocysts are ellipsoidal to slightly ovoid 60.2--67.2 (63.7) x 40.6--47.6 (43.4); micropyle 3 in diameter usually visible; with oocyst wall granular, dark br ... | 1979 | 480077 |
| attempted cross-transmission of coccidia between sheep and goats and description of eimeria ovinoidalis sp. n. | attempted infection of 2 young lambs with oocysts of eimeria christenseni from a goat was unsuccessful. negative results were obtained also when young kids were fed oocysts of eimeria ninakohlyakimovae from sheep. there was no difficulty in infecting lambs with the sheep coccidium resembling e. ninakohlyakimovae nor goats with the goat coccidium e. christenseni. oocysts from the goat measured 38.4 x 26.7 microns, but were easily distinguished from eimeria ahsata from the sheep by sporocyst size ... | 1979 | 480272 |
| [a new lung fluke from the coastal range of ecuador: paragonimus ecuadoriensis n.sp. (paragonimidae, trematoda) (author's transl)]. | p. ecuadoriensis in the first lung fluke described from ecuador. the description is based on 10 adult flukes from a natural infected coati (nasua nasua), 23 adults from 2 experimentally infected cats, and 200 metacercariae from the second intermediate host, the freshwater crab hypolobocera aequatorialis. the new species is characterized by the following features: mouth succer larger than acetabulum or nearly of the same size; integument spines ("cuticular" spines) single; ovary with 5-6 short br ... | 1979 | 483388 |
| [electron microscopic study of genome homology in 2 clones of the simian adenoviruses type 7]. | homology of the genomes of large-plaque (lp) and small-plaque (sp) clones of simian adenovirus type 7 (sv7) was studied experimentally. guanidine chloride helped to isolate circular dna molecules of identical length for both clones within the measurement error (1 = 11 +/- 0.2 micrometer). a heteroduplex sv7lp--sv7sp molecule was found to have two nonhomology sites 0.5 +/- 0.3 mu and 1.0 +/- 0.5 micrometer long located at a distance of 2 and 4 micrometer from one of the ends of the molecules, res ... | 1979 | 483773 |
| helminths of birds and mammals of israel. viii.- skrjabinocapillaria rodentium n. sp. (nematoda capillariidae) from gerbillid and murid rodents. | skrjabinocapillaria rodentium n.sp., found in the stomach of meriones crassus, gerbillus pyramidum, g. gerbillus, g. dasyurus and acomys cahirinus, is described. it differs from the other two species in the genus, s. bakeri and s. eubursata, mainly in being larger, having a larger number of stichocytes and having a cephalic influation in the female and not in the male. | 1979 | 485042 |
| [prevalence and transferability of the plasmid lac+ character in "klebsiella" sp. strains with "lac+-forte" phenotype]. | 36 strains of klebsiella sp. showing a strong lactose-positive phenotype were examined for presence of r factors and for ability to promote the transfer of character lac+; 10 of the 13 r+ strains were able to transfer lac+ character and 4 showed the presence of r-lac factors. transfer of r-lac factors from klebsiella sp. strains to salmonella typhi clinical isolates has also been obtained. | 1979 | 485592 |
| a cholecystokinin-like peptide in crude substance p from human and bovine brain. | the subfractions of crude substance p (sp), fa, fb, and fc, were assayed for sp-like activity (sp-la) and cholecystokinin octapeptide-like activity (cck-8-la) using radioimmunoassays (rias) and bioassays. crude sp preparations from total human and bovine brains, cortex, and subcortex (amygdala, substantia nigra) contain cck-8-la as well as sp-la. most of sp-la was contained in fb, whereas most of cck-8-la was in fc. fa gave ambiguous results. pharmacological results previously obtained with fc m ... | 1979 | 485701 |
| metronidazole: a comparative study on the intravaginal absorption, metabolism and disposition of a single product and commercial formulation. | the absorption, tissue distribution, metabolism and excretion of 14c-metronidazole (14c-mtz) were compared during the first 24 hr upon the intravaginal (ivg) administration of 14c-mtz, either as a single product (ivg-sp) or as a formulation in the form of a commercial cream (ivg-cp). peak 14c levels in tail blood samples were reached at 1 and 2 hr in ivg-sp and ivg-cp treated rats, respectively. the rate of decline of blood 14c was faster in the ivg-sp treated rats as opposed to their ivg-cp tre ... | 1979 | 485719 |
| metabolism of dibenzo[1,4]dioxan by a pseudomonas species. | pseudomonas sp. n.c.i.b. 9816 strain 11, when grown on salicylate in the presence of dibenzo[1,4]dioxan, accumulated cis-1,2-dihydroxy-1,2-dihydrodibenzo[1,4]dioxan and 2-hydroxydibenzo[1,4]dioxan in the culture medium. each metabolite was isolated in crystalline form and identified by a variety of conventional chemical techniques. crude cell extracts prepared from the parental strain grown with naphthalene oxidized cis-1,2-dihydroxy-1,2-dihydrodibenzo[1,4]dioxan under both aerobic and anaerobic ... | 1979 | 486138 |
| endocytosis and breakdown of ribonuclease oligomers by sinusoidal rat liver cells in vivo. ii. effect of charge. | experiments presented in this paper suggest that sinusoidal rat liver cells recognize basic groups on proteins and that this recognition results in endocytosis of the proteins. evidence for involvement of basic groups was obtained in two ways. firstly, we changed the positively charged amino groups of the cross-linked ribonuclease molecules to neutral or negative by acetylation or succinylation, respectively. the modified proteins did not contain easily reducible disulfide bonds and they were no ... | 1979 | 486553 |
| bovine and equine onchocerciasis in eastern north america with a discussion on cuticular morphology of onchocerca spp. in cattle. | skin sections and/or the ligamentum nuchae and ligamentum gastrolienale were examined from twelve bovine carcasses obtained from southern and eastern ontario and from quebec. of these, seven were shown to be infected with onchocerca gutturosa and/or onchocerca lienalis. the morphology of the adult female cuticle is discussed. skin sections from 43 equine carcasses from a slaughter house in grenville, quebec were examined and microfilariae of onchocerca sp. were recovered from 32 (74%). there are ... | 1979 | 487249 |