Index Catalog // ScholarsArchive@OSU

Study of sulfite mutants of Saccharomyces cerevisiae

Creator:: Wightman, JoLynne Dee
Abstract:: Sulfite mutants representing five complementation groups, previously derived from an ethyl methanesulfonate-treated haploid strain of Saccharomyces cerevisiae were studied. Although the wildtype S. cerevisiae strain used (isogenic to X2180-1 A) had a basal tolerance for sulfite (7 μM free H₂SO₃), the sensitive and resistant mutants were found to tolerate less...
Resource Type:: Masters Thesis
Full Text:: rate of damaging effect depends on sulfite concentration, pH, temperature, physiological state of

Morphine-codeine interactions in rodents

Creator:: Blank, Jerome W.
Abstract:: Rats given morphine-codeine combinations exhibited significantly increased hotplate reaction times compared with rats given an analgesic dose of one agent alone. Genera, species, sex, protein binding and metabolism were studied as possible implicating factors for the increased reaction times. Both male and female rats exhibited increased reaction time, and showed...
Resource Type:: Masters Thesis
Full Text:: onset and duration of the effect. When both analgesic and nonanalgesic doses of one agent were given

Work load and S-T segment changes during monitored bicycle ergometer exertion following varied carbohydrate feedings and vitamin B-6 supplementation

Creator:: Siemann, Art W.
Abstract:: The purpose of this study was to monitor coronary responses occurring in the S-T segment of an electrocardiogram before, during and after exercise following a "standard" carbohydrate-loading schedule with varied vitamin B-6 supplementation. The study was conducted using four college-aged males who had been training a minimum of two years...
Resource Type:: Masters Thesis
Full Text:: control sessions and the experimental sessions would indicate the effect the experimental diet would

Composition of flavonoid phenolic polymers isolated from red wine during maceration and significance of flavan-3-ols in foods pertaining to biological activity

Creator:: Aron, Patricia M.
Abstract:: Representing the most common flavonoid consumed in the American diet, the flavanols and their polymeric condensation products, the proanthocyanidins, are regarded as functional ingredients in various beverages, whole and processed foods, herbal remedies and supplements. Their presence in food affects food quality parameters including astringency, bitterness, sourness, sweetness, salivary viscosity,...
Resource Type:: Masters Thesis
Full Text:: Effect on food quality............................................................................6

Investigations of gluten proteins from functional and historical perspective

Creator:: Zhang, Ying
Abstract:: Wheat (Triticum aestivum) is one of the world’s major staple food crops, with flour produced from starchy endosperm being used for breads, cakes, noodles and various other wheat-based foods. The unique bread making properties of wheat are primarily attributed to its gluten-forming storage proteins: gliadins and glutenins. This study investigated...
Resource Type:: Masters Thesis
Full Text:: )..………………………………………………64 3.2 Two-way ANOVA results of control effect…………………………………64 3.3 Onset temperatures under

Dissimilation of nonnitrogenous compounds by Acetobacter pasteurianum

Creator:: Kawasaki, Elwell Hachiro
Resource Type:: Masters Thesis
Full Text:: inhibited the oxygen consumption even in the absence of arsenite. The arsenite effect on the carbon

The physiological activity of some plant estrogens

Creator:: White, Ronald J.
Resource Type:: Masters Thesis
Full Text:: The physiological activity of some plant estrogens T9E

Some effects of plant estrogens on animals

Creator:: Noteboom, William Duane
Resource Type:: Masters Thesis
Full Text:: roproduotton by teedthg çen1atein to prerant females. The effect of genlateln did not carry over to the young

Glycogen utilization in newborn rats subjected to cold stress

Creator:: Van Tassel, Loren Eugene
Abstract:: Newborn rats exhibit a torporous response to cold stress at 2°C from which they revive after several hours exposure even though respiratory, cardiovascular, and muscular movements have ceased. At less severe temperatures (20 to 25°C) the rats respond with a non-torporous decrease in metabolic and physiologic activity and a lowering...
Resource Type:: Masters Thesis
Full Text:: temperature and time 3 Survival of newborn rats following exposure to temperature of 2" - 5" C 4 Effect of

In vivo and in vitro metabolism of 4-benzo(b)thienyl-N-methylcarbamate and 4-hydroxy benzothiophene by the white rat

Creator:: Miaullis, John Bartley
Abstract:: In vitro studies of Mobam (4-benzo(b)thienyl N-methylcarbamate) metabolism have demonstrated that at least three ether soluble metabolites are formed in a microsomal system fortified with reduced triphosphopyridine nucleotide (NADPH). One of the metabolites was identical to 4HBT (4-hydroxy benzothiophene), the phenol of Mobam. The other two metabolites did not possess...
Resource Type:: Masters Thesis
Full Text:: dependent on their stability in the physiological environment. In addition to ester cleavage, other

In vivo and in vitro metabolism of 4-benzo(b)thienyl-N-methylcarbamate and 4-hydroxy benzothiophene by the white rat

Creator:: Miaullis, John Bartley
Abstract:: In vitro studies of Mobam (4-benzo(b)thienyl N-methylcarbamate) metabolism have demonstrated that at least three ether soluble metabolites are formed in a microsomal system fortified with reduced triphosphopyridine nucleotide (NADPH). One of the metabolites was identical to 4HBT (4-hydroxy benzothiophene), the phenol of Mobam. The other two metabolites did not possess...
Resource Type:: Masters Thesis
Full Text:: dependent on their stability in the physiological environment. In addition to ester cleavage, other

Radiation inhibition of salt-water adaptation in fish

Creator:: Monie, Herbert Joseph
Abstract:: Four species of euryhaline teleosts (chinook salmon, Oncorhynchus tshawytscha, Walbaum; staghorn sculpin, Leptocottus armatus, Girard; starry flounder, Platichthys stellatus, Pallas; shiner perch Cymatogaster aggregata, Gibbons) were exposed to x-rays. The irradiated animals were maintained in either of two different environments. The effects of x-radiation were determined by observing the percent...
Resource Type:: Masters Thesis
Full Text:: . Analytical Techniques 13 III. RESULTS 15 A. Mortalities 15 B. Physiological Changes 15 C

Naphthalene resistance in a house fly strain : its inheritance and characteristics

Creator:: Schafer, James Arnold
Abstract:: A combination of genetical and biochemical methods were utilized in investigating house fly resistance to naphthalene. The inheritance of resistance was determined by crossing a naphthalene resistant strain of Musca domestica L. with a susceptible mutant marker strain. Biochemical comparisons were made on substrains isolated from the progeny of these...
Resource Type:: Masters Thesis
Full Text:: effect suggests that slow absorption (chromosome III) and active detoxication of naphthalene

Histologic effects of chronic selenium deficiency in selected tissues of laboratory rats

Creator:: Sprinker, Lucas Harry
Abstract:: The selenium-responsive syndromes and the discovery of Factor 3-selenium focused attention on selenium in metabolism. Two hypotheses have been advanced to explain the metabolic effect of selenium: 1) substitution or sparing of alpha tocopherol, and 2) a primary role in metabolism. The first hypothesis is supported by Scott and Desai,...
Resource Type:: Masters Thesis
Full Text:: metabolic effect of selenium: 1) substitution or sparing of alpha tocopherol, and 2) a primary role in

The effect of selenium on chemical carcinogenicity in the rat

Creator:: Johnston, Weldon Kearney
Abstract:: One hundred and fifty-one weanling rats of both sexes were fed control diets or diets containing 160 ppm diethylnitrosamine (DEN) or 150 ppm N-2-fluorenyl-acetamide (FAA). The carcinogen level was calculated so that the LD₅₀ should be achieved at about 17 weeks. Each carcinogen treatment was incorporated with three different diet...
Resource Type:: Masters Thesis
Full Text:: The Effect of Selenium on Chemical Carcinogenicity in the

The visual response of the purple shore crab, Hemigrapsus nudus, to ionizing and non-ionizing radiation

Creator:: Jordan, Neil Michael
Abstract:: Bioelectric responses from the isolated eye of the purple shore crab were measured by the electroretinogram with stimulation by light from wavelengths of 250 to 800 nm, strontium-yttrium-90 beta radiation, 17.5 keV x-radiation, and 3-cm microwaves. Peak sensitivities to light stimulation were found at 350 and 500 nm. These peaks...
Resource Type:: Masters Thesis
Full Text:: even when the eye was excised. A temperature effect was also noted by this author, in which an

The influence of calcium carbonate and clacium gluconate on tetracycline absorption in man

Creator:: Owings, Gary Lee
Abstract:: This experiment was designed to investigate the in vivo effects of calcium ions on tetracycline absorption when oral doses of tetracycline and calcium-containing medications were administered concurrently. Twenty-one human volunteers were selected and divided into three equal-sized groups: Group A, Group B, and Group C. Each volunteer in Group A...
Resource Type:: Masters Thesis
Full Text:: depressant effect of calcium carbonate on tetracy- cline absorption was significantly greater than the

Absorption of benzocaine -³H from semi-solid dosage forms following rectal administration in rats

Creator:: Lorskulsint, Duangchit
Abstract:: The effect of concentration, vehicle and surfactant on the absorption of benzocaine -³H across the rat's rectal mucosa was investigated. Blood radioactivity levels were determined after the application of benzociane -³H containing suppositories and ointments. A wet oxidation method was used for sample digestion. Since the radioactivity counted is the...
Resource Type:: Masters Thesis
Full Text:: Agents Effect on Absorption 14 Effect of Physiological Changes on Absorption 17 Absorption of Topical

Effect of cadmium on ceruloplasmin levels in the rat

Creator:: Robinson, Alfred Vern
Abstract:: Injection of a 2.0 mg Cd ²⁺ /kg B.W. (I.P. as CdC1 ₂ in .05 M NaAc, pH = 6.9-7.2, .15 M or p = .15 with NaCl) resulted in a decrease in ceruloplasmin (EC 1.12.3) p-phenylenediamine oxidase activity within one hour of injection. Maximal decrease (40%) occurred within six...
Resource Type:: Masters Thesis
Full Text:: Science presented on natMi /4 /92,2 (Major Department) (Date) Title: EFFECT OF CADMIUM ON CERULOPLASMIN

A comparison of a smoking and nonsmoking population using the forced expiratory flow in the seventy-five to eighty-five percent segment of the spirometric curve

Creator:: Breese, John David
Abstract:: Forced vital capacity lung expiration examinations of nonsmoking and cigarette-smoking male sample populations were compared to determine if the 75 to 85 percent segment was a more sensitive test of early lung dysfunction. The nonsmoking population was composed of 240 men who were tested for values of forced vital capacity...
Resource Type:: Masters Thesis
Full Text:: and pulmonary dimensions. II FEF75_85% analysis of variance testing effect of smoking, age and height

The uptake and retention of cesium-134 in Microtus canicaudus Miller

Creator:: Lei, Wayne
Abstract:: A study was performed to assess the uptake and retention patterns of cesium-134 in the gray-tailed vole, Microtus canicaudus Miller. To furnish a realistic source of contaminated food for the voles, wheat seedlings were raised in hydroponic solutions to provide radiocesium labeled wheat clippings. The hydroponic system was designed to...
Resource Type:: Masters Thesis
Full Text:: relatively high energies of emitted radiation (Davis, 1963). In addition, cesium is a physiological analog

Some possible roles for selenium in the reproductive physiology of the male graytailed vole (Microtus canicaudus)

Creator:: Whitfield, Stephen Curtiss
Abstract:: The testes of the gray-tailed vole (Microtus canicaudus Miller) exhibited a high affinity for selenium relative to other selected tissues. Uptake of selenium-75 in the testis-epididymis complex was delayed relative to uptake by the whole body, kidney, and liver. This pattern of uptake suggested that selenium was metabolically incorporated into...
Resource Type:: Masters Thesis
Full Text:: E in the diet, the addition of selenium produced no significant changes in measured physiological

Effects of fractionated radiation doses on survival times of the newt (Taricha granulosa)

Creator:: Campbell, Carol Lee
Abstract:: This was a study designed to determine the occurrence of recovery from radiation damage in Taricha granulosa. Irradiation with either gamma or x-ray sources in the range of 96-10,000 rads was given. (The mean or median survival times were determined.) Doses were fractionated and the survival times for the same...
Resource Type:: Masters Thesis
Full Text:: greatest importance. If the fractionation interval was too short, a merely additive effect of the

Exposure to ultraviolet-B radiation : sensitivity evaluation of an important ecological parameter of the marine copepod Acartia clausi

Creator:: Karanas, James J.
Abstract:: The ozone present in the atmosphere filters incident solar ultraviolet (UV) radiation such that only the longer wavelengths of the total UV spectrum emitted by the sun reach the earth's surface. Atmospheric increases in nitrogen oxides and chlorofluoromethanes represent a threat to the existence of this protective screen. As the...
Resource Type:: Masters Thesis
Full Text:: hatching of A. clausi eggs. 31 11 The effect of temperature on development time of A. clausi eggs for two

Diurnal variations of body temperature and reaction time accompanying early morning and evening aerobic routines

Creator:: Smith, Ella Jean
Abstract:: The primary purpose of this study was to determine the effects of early morning and evening bouts of aerobic exercise upon the diurnal pattern of reaction time and body temperature. An effort was made to classify subjects according to the rhythmic trends identified with 'morning' and 'evening' type persons. Eight...
Resource Type:: Masters Thesis
Full Text:: to detect physiological and psychological orientation to the two extremes of day. Treatments

The lethal response of the roughskin newt, Taricha granulosa (Skilton), to ultraviolet-B radiation at three fluence rates

Creator:: Michaelis, Barbara
Abstract:: Roughskin newts, Taricha granulosa (Skilton), were exposed to UV-B (280-320nm), UV-A (321-380 nm), and visible radiation from fluorescent sunlamps (Westinghouse FS40) that were filtered with cellulose acetate film. UV-B controls were exposed to irradiation from sunlamps that were filtered with Mylar-D, a polyester film that effectively absorbed UV-B radiation while...
Resource Type:: Masters Thesis
Full Text:: the fluence rate threshold for Taricha. A dose rate effect appears to exist, with respect to LD50

Pharmacokinetics of theophylline and it's N-7 derivatives in rabbits

Creator:: Tavipatana, Wattanaporn
Abstract:: Pharmacokinetics of theophylline and N-7 substituted theophylline in rabbits when administered alone and in various combinations were investigated. This thesis has four chapters dealing with etophylline and theophylline; proxyphylline and theophylline; dyphylline and theophylline; and etophylline, proxyphylline and dyphylline pharmacokinetics when administered concomitantly. All chapters are interrelated. Each chapter has...
Resource Type:: Masters Thesis
Full Text:: has no significant effect on the pharmacokinetic behavior of theophylline, including protein or

The effectiveness of the Po₂ Aerobic Exerciser in simulating high altitude training at sea level in cross country runners

Creator:: Sievers, Gary K.
Abstract:: Purpose: The purpose of this study was to determine the effectiveness, if any, of the P0₂ Aerobic Exerciser in simulating high altitude training in cross country runners living at sea level. Procedures: This study was conducted during the 1982 winter term at Oregon State University. Four cross country runners of...
Resource Type:: Masters Thesis
Full Text:: design. Physiological tests were: the Balke submaximal treadmill test to measure changes in Vol max

Purine nucleotide-induced seizures in rat prepiriform cortex

Creator:: Zhao, Xiaoqin S.
Resource Type:: Masters Thesis
Full Text:: anticonvulsant effect of 2 methylthio-ATP is therefore likely to be due to its breakdown to 2-methylthio

The distribution and role of "available" iron in two estuaries

Creator:: Holden, Robert Bennett
Abstract:: A detailed study of iron concentrations measured by the reducible, reactive ferrous, and extractable methods was conducted in Auke Bay, Alaska during June 1973 and in Hood Canal, Washington during October 1973 and April 1974. The concentrations by each method were generally highest at the bottom and decreased towards the...
Resource Type:: Masters Thesis
Full Text:: chlorophyll a at 1100 April 4, 1974 at station 33A in Hood Canal. 58 23. The effect of water storage on the

Effects of polychlorinated biphenyls (PCBs) on the respiration of the speckled sanddab (Citharichthys stigmaeus)

Creator:: Haines, Virginia Ewald
Abstract:: Specimens of Citharichthys stigmaeus, the speckled sanddab, were taken from Yaquina Bay, Newport, Oregon and exposed for eight days to dissolved measured concentrations ranging from 2.9 μg/l to 190 μg/1 of the polychlorinated biphenyl, Aroclor® 1260. Oxygen consumption was measured to determine any change from routine levels of respiration. This...
Resource Type:: Masters Thesis

Growth response of a marine phytoplankton Coccolithus huxleyi to various chemical forms of cobalt

Creator:: Longaker, Harold L.
Abstract:: The results of a preliminary experiment suggested that a complexed form of cobalt was more efficacious in promoting growth of a marine phytoplankton than ionic cobalt. The phytoplankton used in this experiment was Coccolithus huxleyi, a vitamin B₁₂ producer, and the cobalt complex was cobalt (II)- ethylenediaminetetracetic acid [Co(II)- EDTA]....
Resource Type:: Masters Thesis
Full Text:: (from Pratt, 1972). 9 2 Molecular structure of deoxyadenosyl (from Pratt, 1972). 9 3 Effect of the

Effect of zinc supplementation on cell growth and lipoprotein binding in human fibroblast cells

Creator:: Shimakawa, Tomoko
Abstract:: Normal human skin fibroblast cells were used to study the effect of zinc supplementation of the media on cell growth and the competitive binding activity of low density lipoprotein (LDL). Cells were grown in the media containing Dulbecco's Modified-Eagle Medium (DMEM), 5% (v/v) fetal calf serum (FCS), and various levels...
Resource Type:: Masters Thesis
Full Text:: ; Effect of Zinc Supplementation on Cell Growth and Lipoprotein Binding in Human Fibroblast Cells

Plasma cholesterol levels, atherosclerosis and liver damage in rabbits fed cyclopropenoid fatty acids

Creator:: Ferguson, Thomas Lyle
Abstract:: In this five-week feeding study male New Zealand rabbits were fed diets containing cyclopropene fatty acids (CPFA), diets containing cholesterol, and diets with both CPFA and cholesterol added to test the effect of CPFA on cholesterol metabolism and atherosclerosis induction. When CPFA-fed animals were compared with control animals, they tended...
Resource Type:: Masters Thesis
Full Text:: they do in rainbow trout. One interesting physiological effect of CPFA feeding has been largely

Estimation of the energy cost of walking 10,000 steps

Creator:: Birdsley, Kari L.
Abstract:: There is a strong campaign underway to promote increased physical activity among the U.S. population. The U.S. Surgeon General and the U.S. Dietary Guidelines have presented physical activity recommendations in terms of the amount of time accumulated in physical activity and/or in terms of energy expenditure over the course of...
Resource Type:: Masters Thesis
Full Text:: activity has a positive effect on one's physical well being. The American College of Sports Medicine

Some effects of life stage, temperature, pH and alkalinity on the acute toxicity of inorganic chloramines to young Coho salmon (Oncorhynchus kisutch)

Creator:: Lamperti, Larry Phillip
Abstract:: Acute toxicity bioassays (96-hr TL₅₀) were employed to determine the tolerance of coho salmon (Oncorhynchus kisutch) to inorganic chloramines at the alevin (yolk sac fry), yolk absorption, and early juvenile life stages. Any influence of changes in temperature, pH, and total alkalinity on the tolerance of juvenile coho for chloramines...
Resource Type:: Masters Thesis

The effect of sodium citrate ingestion on 1600 meter running performance

Creator:: Guerra, Arthur
Resource Type:: Masters Thesis
Full Text:: Master of Science in Human Performance presented on May 2, 1995. Title: The Effect of Sodium Citrate

Physiological and pharmacological investigation of the vascularized and nonvascularized teleost heart with adrenergic, cholinergic and coronary dilating agents

Creator:: Stuart, Robert Edward
Resource Type:: Masters Thesis
Full Text:: Physiological and pharmacological investigation of the

Impact of weak and strong acids on the destruction of lactic acid bacteria during high pressure processing

Creator:: Sarangapani, Rama Krishna
Abstract:: High hydrostatic pressure (HHP) affects the pH of weak acids due to an increased degree of acid dissociation while under pressure. The temporary pH reduction by high pressure in such a case may influence the barotolerance of microorganisms. The objective of this study was to determine the impact of weak...
Resource Type:: Masters Thesis
Full Text:: bacteria across a range of pH under high hydrostatic pressure conditions. The effect of two acid groups

Effects of chronic estrogen treatment on uterine nucleic acids

Creator:: Rinard, Gilbert Allen
Abstract:: The effects of estrogen treatment on uterine weight, uterine nucleic acid content and adrenal weight were studied. Daily doses of 0.05μg or 0.1 μg of Estradiol 17-β were administered subcutaneously to seven day castrated female rats for periods varying from 0 to 168 days. After two days of treatment uterine...
Resource Type:: Masters Thesis
Full Text:: Irnmediate Effect of Changing Dose Chronic Effects DISCUSSION SUMMARY BIBLIOGRAPHY APPENDIX Page I 5

The relationship of 5'-nucleotidase activity in lamb muscle tissue to sub-minimal selenium levels administered to their dams

Creator:: Arnold, Margaret Anna
Abstract:: White muscle disease or muscular dystrophy of sheep is a selenium responsive malady common to many areas with an inherent natural deficiency of selenium in the forage. The disease can be prevented in lambs by adding trace amounts (approximately 0.1 ppm) of selenium to the otherwise selenium deficient, forage fed...
Resource Type:: Masters Thesis
Full Text:: -nucleotidase enhancement, in dysErophic lamb muscle nor the effect, of selenium upon repressing activity

The effect of the copper intake on the flavor and storage life of meat products

Creator:: Idris, Omer Fadle
Abstract:: The susceptibility of milk to copper-induced or accelerated off-flavors is well known. Other animal products, including meats have not been so extensively studied. In this study different species of animals (pigs, calves, lambs and rabbits) were fed on normal rations with and without supplements of copper sulfate. During the course...
Resource Type:: Masters Thesis
Full Text:: - rnents urr:dur:ed a.ny sig:i.ificant effect on rneat; flav,:rs. t/ 1M^3o, lrrofe ,y6r'1 t { T ll i:t

A comparative study of the in vitro localization of mercury from phenylmercuric acetate and mercuric salt in rat kidney and liver subcellular fractions and their effect on alkaline phosphatase

Creator:: Massey, Thomas H.
Abstract:: Studies were undertaken to determine the extent and rate of binding of Hg-203 labeled phenylmercuric acetate and mercuric ace tate in rat kidney and liver slices and their subcellular fractions after 37°C incubation of the slices in Krebs-Ringer -phosphate solutions containing the mercurials at 10⁻⁴ molar. A fast and parallel...
Resource Type:: Masters Thesis
Full Text:: their effect on alkaline phosphatase AN ABSTRACT OF THE THESIS OF Thomas Harding Massey for the M. S

Effects of chronic coumestrol administration on female rats

Creator:: Chan, Elaine Chi-ling
Abstract:: The effects of coumestrol on the uterine weight, uterine fluid imbibition, uterine nucleic acid content, adrenal weight and body weight of female rats were studied. Daily doses of 20 micrograms of coumestrol per 0.1cc propylene glycol were administered subcutaneously to spayed rats following a seven day recovery period, for durations...
Resource Type:: Masters Thesis
Full Text:: knowledge of the physiological characteristics of coumes- trol as a phytoestrogen is fragmentary, White

Estrogen regulation of pituitary function in the gonadectomized sheep

Creator:: Cooper, Gordon Jay
Abstract:: A total of five individual experiments were conducted with gonadectomized, male sheep to study the influence of estrogen on the plasma level of pituitary activities, with the greatest emphasis given to gonadotropic activity. Estrogen treatments employed were as follows: 1. 12 mg. diethylstilbestrol (DES) implanted subcutaneously. 2. 1 mg. DES...
Resource Type:: Masters Thesis
Full Text:: Pituitary Size 3 Pituitary Cytology 4 Pituitary Hormone Content 5 Effect of Gonadectomy 5 Effect of

Dosimetry considerations in the irradiation of biological populations

Creator:: Denovan, James Thomas
Abstract:: The effects of changes in dosimetry conditions on the radiation sensitivity of a constant biological population were determined. The organism used for this study was the strain B of Escherichia coli. The percentage survivals of these cells in an aqueous solution were determined at the same total exposure with different...
Resource Type:: Masters Thesis
Full Text:: FIGURES Figure 1. Typical bacterial growth curve Page 5 2. The effect of the inverse square law

Temperature-salinity effects on net protein synthesis and viability of Vibrio marinus mp-1, an obligately psychrophilic marine bacterium

Creator:: Cooper, Mary Faith
Abstract:: The relationship of temperature and salinity to protein synthesis was determined for cells of Vibrio marinus, MP-1. Protein synthesis was measured by the incorporation of radioactive proline into hot trichloroacetic acid precipitable material. At all salinities protein synthesis occurred at 15°C and 20°C but not at 25°C. The critical temperature...
Resource Type:: Masters Thesis
Full Text:: stationary phase cells. This suggests physiological processes active during rapid cell growth as possible

Effects of selenium and glutathione peroxidase on the biosynthesis of prostaglandin E₂ and F₂α by the ram vesicular gland

Creator:: Abdelgadir, Salaheldin Eltigani
Abstract:: This study was conducted to investigate the involvement of selenium and glutathione peroxidase in prostaglandin biosynthesis by the ram vesicular gland. Vesicular glands were collected from healthy intact rams covering a wide range of selenium nutrition and were analyzed for selenium concentrations, glutathione peroxidase activities and levels of prostaglandin E₂...
Resource Type:: Masters Thesis
Full Text:: have an indirect effect on prostaglandin biosynthesis by protecting the prostaglandin endoperoxide

Some effects of ultraviolet-B radiation (290-320 nm) on unialgal and mixed cultures of two centric diatoms

Creator:: Cavanaugh, William M.
Abstract:: Reduction of stratospheric ozone caused by human perturbation with halocarbon compounds and the consequent increase in mid-wavelength ultraviolet radiation (UV-B radiation. 290-320 nm) reaching the earth's surface could have deleterious ecological effects on marine primary producers. Unialgal and mixed cultures of Thalassiosira pseudonana and Thalassiosira weisflogii were exposed to three...
Resource Type:: Masters Thesis
Full Text:: radiation have a measurable effect on the population growth rates and/or community composition of certain

Uranium biokinetics in gavaged young adult female rats

Creator:: Keizer, Philip John
Abstract:: Blood, liver, kidney, femur, and ovaries were assayed from female Wistar rats following oral administration of uranyl nitrate. Three uranium concentrations were studied for six time periods ranging from 4 hours to 240 hours following gavage. Uranium burdens of tissues were determined by neutron activation and delayed fission neutron counting...
Resource Type:: Masters Thesis

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