Browsing BIO Faculty Publications by Issue Date
Now showing items 1-20 of 354
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Silicon: Its role in vital processes
(American Association for the Advancement of Science, 1973-03-23)Author pointed that there is some proof of a silicon metabolism role in "vital processes in animals or man" pointing that data on the gastropod Oncidium planatum showing that its liver contained 11.3 percent silica. -
Toxicity of nalidixic acid on Candida albicans, Saccharomyces cerevisiae, and Kluyveromyces lactis
(American Society for Microbiology, 1976-09-04)The antibacterial drug nalidixic acid (Nal) can suppress the growth of Candida albicans at levels of the drug normally found in urine. Growth suppression increases as drug levels are increased, and Nal also causes a similar ... -
Depression of lactose hydrolysis by yeasts
(Microbiology Society, 1977-03-02)To investigate the role that the known disaccharidase depression may play in the aetiology of infant gastroenteritis caused by Candida albicans, C. albicans and the rarely pathogenic Saccharomyces cerevisiae were studied ... -
Increased production of beta-lactamase under anaerobic conditions in some strains of Escherichia coli
(American Society for Microbiology, 1979-07-25)A simple biological assay to detect beta-lactamase activity exhibited by selected cultures of Escherichia coli was used to test enzyme production in cells incubated aerobically and anaerobically. Anaerobic incubation ... -
Tryptophan and serotonin metabolism after sustained tryptophan infusion
(Elsevier, 1984)In an attempt to elucidate the effects of sustained administration of tryptophan on serotonin synthesis and turnover in mammalian brain, mini-osmotic pumps containing tryptophan or vehicle were implanted in albino mice for ... -
Segregant-defective heterokaryons of Candida albicans
(Springer, 1986)Heterokaryons (hets) of the asexual, pathogenic yeast Candida albicans obtained by fusing protoplasts of complementing auxotrophic strains generate large numbers of parental-type auxotrophic monokaryons by random assortment ... -
Isolation and Characterization of Coproporphyrin Produced by Four Subspecies of Bacillus thuringiensis
(American Society for Microbiology, 1986-03)It was found by using spectrophotometric, spectrofluorometric, and high-pressure liquid chromatography that four subspecies of Bacillus thuringiensis produce coproporphyrin. The porphyrin isomer was identified as coproporphyrin ... -
Changes in oviducal vascularity during the reproductive cycle of three oviparous lizards (Eumeces obsoletus, Sceloporus undulatus and Crotaphytus collaris)
(Society for Reproduction and Fertility, 1987-07)Histologically derived estimates and ink suspension vascular casts were used to examine oviducal vascular changes. Vascularity peaked during gravidity and was correlated with maximal plasma progesterone concentrations. The ... -
Luteal morphology, atresia, and plasma progesterone concentrations during the reproductive cycle of two oviparous lizards, Crotaphytus collaris and Eumeces obsoletus
(John Wiley & Sons, 1987-08)From ovulation to oviposition, the corpora lutea of the oviparous lizards Crotaphytus collaris and Eumeces obsoletus exhibit three stages of luteal development: 1) luteogenesis, 2) luteal maturity, and 3) luteal regression. ... -
Variations for susceptibilities to ultraviolet induced cellular inactivation and gene segregation among protoplast fusion hybrids of Candida albicans
(University of Cambridge * Faculty Press, 1988)Hybrids of the naturally diploid, asexual and opportunistically pathogenic yeast, Candida albicans, can be obtained artificially by protoplast fusion. Evidence is presented that gene conversion and reciprocal recombination ... -
Feeding evoked by electrical stimulation in collared lizards
(Elsevier, 1988)Feeding was evoked in collared lizards, Crotaphytus collaris, using electrical stimulation of the brain (ESB). Stimulation sites were tested in the forebrain and midbrain of 39 animals. Six stimulation loci were localized ... -
Hyperphenylalaninemia in the hph-1 mouse mutant
(International Pediatrics Research Foundation, 1988-01)A mutation, resulting in a deficiency of liver GTP-cyclohydrolase activity, has been induced in the laboratory mouse. Mice homozygous for this mutation exhibit hyperphenylalaninemia under the following conditions: 1) early ... -
Hph-1: A mouse mutant with hereditary hyperphenylalaninemia induced by ethylnitrosourea mutagenesis
(PubMed, 1988-02)Ethylnitrosourea mutagenesis of spermatogonial stem cells and a three-generation breeding scheme were used to screen for recessive mutations that cause defects in phenylalanine metabolism leading to elevated serum levels ... -
Biochemical defect of the hph-1 mouse mutant is a deficiency in GTP-cyclohydrolase activity
(PubMed, 1988-02)A hyperphenylalaninemic mouse mutant, hph-1, has been identified in the progeny of mice treated with the mutagen ethylnitrosourea. Phenylalanine hydroxylase activity levels in mutant liver lysates are reduced relative to ... -
Unidirectional internuclear transfer of linked genes in heterokaryons of Candida albicans
(Wiley - V C H Verlag GmbH & Co. KGaA, 1989)Nutritionally balanced heterokaryons of the naturally diploid, asexual yeast, Candida albicans are produced by fusing protoplasts of complementing auxotrophic strains. Spontaneous unidirectional internuclear transfers of ... -
Anaerobically induced production of hybrid monokaryons by heterokaryons of Candida albicans
(Springer Netherlands, 1989-01)During aerobic replication, balanced heterokaryons (hets) of Candida albicans produced by fusing protoplasts of complementing auxotrophic strains characteristically segregate low frequencies of prototrophic monokaryons ... -
Video microscopy: system calibration for densitometric analysis
(Informa Healthcare, 1989-10) -
Experimental histoplasmosis in the mouse. Immunoglobulin class response, total immunoglobulin A levels, immune complex formation, and occurrence of antigen in serum and urine
(American Thoracic Society, 1989-10)Biotin-avidin enzyme-linked immunosorbent assays (ELISA) were developed to study the appearance of free antibody of the IgM, G, and A classes of immune complexes (IC) containing those classes and of antigen in the serum ... -
Pahhph-5: a mouse mutant deficient in phenylalanine hydroxylase
(PubMed, 1990-03)Mutant mice exhibiting heritable hyperphenylalaninemia have been isolated after ethylnitrosourea mutagenesis of the germ line. We describe one mutant pedigree in which phenylalanine hydroxylase activity is severely deficient ... -
Recombinagenicity of caffeine for Candida albicans
(SpringerSpringer Netherlands, 1990-05)Caffeine at concentrations of 0.5 x 10(-2) M or higher inhibited cell replication and induced gene segregations in Candida albicans cultured on defined complete medium. Both responses increased incrementally with increasing ...