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Reactions Of Reduced Glutathione With Some Methylated Selenium Compounds, Nancy Wendt Thiex Jan 1974

Reactions Of Reduced Glutathione With Some Methylated Selenium Compounds, Nancy Wendt Thiex

Electronic Theses and Dissertations

Selenium biochemistry has been of general interest since the discovery of selenium as the toxic agent in certain plants, which when ingested by animals causes a definite disease syndrome and even death. Early scientists suggested that the logical place in the body for toxic selenium compounds to attack was at the various sites occupied by sulfur. In 1939 a study was published which indicated that reduced glutathione (GSH), a thiol, protected rats against death from a minimum fatal dose of selenium given as sodium selenite. Since this discovery, the reaction of GSH with various selenium containing compounds has been the …

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Initiation Of Parturition In Dairy Cows With Dexamethasone And Dexamethasone Plus Estradiol Benzoate, Gary Lee Beardsley Jan 1974

Initiation Of Parturition In Dairy Cows With Dexamethasone And Dexamethasone Plus Estradiol Benzoate, Gary Lee Beardsley

Electronic Theses and Dissertations

Parturition was initiated in 25 of 29 (Trial 1) and 26 of 26 (Trial 2) Holstein cows given dexamethasone (Trial 1), 4.4 mg/100 kg body weight, or dexamethasone plus .25 mg estradiol benzoate (Trial 2) at day 273 of gestation. Parturition occurred at 45.l z +/-11.1 h (Trial 1) and 40.8 ± 9.6 h (Trial 2) after injection. Twenty-nine control cows (Trial 1) and 26 control cows (Trial 2) had average gestation lengths of 280 and 281 days, respectively. In Trial 1, calving difficulty was greater (P <.05) while birth weight of calves was 3.0 kg less (P<.05) for the induced cows compared to controls. In Trial 2, no differences in calving difficulty were found, while calf birth weight was 2.5 kg less (P <.10) for the induced cows compared to controls. Average birth weights of calves were 42.4 and 45.4 kg, Trial 1; and L~o.8 and 43.3 kg for Trial 2, for induced and control groups. Severity of udder edema did not differ for either trial. Average daily milk production for the first 9 wk of lactation was 2l~.8 kg and 27.8 kg (Trial 1) and 24.2 kg and 27.7 kg (Trial 2), for induced and control groups. In both trials, differences in milk fat or fat corrected milk were nil. Total milk production (305 day-2X-mature equivalent) was not significantly different for either trial. Changes in body weight were similar for control and induced cows in both trials. The incidence of retained placental membranes was 76 and 10'/4 (Trial 1) and 50 and 4% (Trial 2) for induced and control cows. Average days to first heat, days to firs+, service, days to conception, and services per conception for induced cows were: 58 .4, 79-9, 117.8, 2.0 (Trial l); 80.7, 81.4, 102.2, 1.64 (Trial 2); and for control cows were: 58.6, 82.3, 105.5, 1.8 (Trial l); 89.0, 91.4, 128~6, 1.94 (Trial 2). In Trial 1, the incidence of milk fever in cows with no previous history was 24 and 10'/4 for induced a"'1.d control cows. There were no differences in the incidence of metabolic disorders in Trial 2. Results of California Mastitis Tests were similar for control and induced cows in both trials. In both Trial 1 and Trial 2, fat, protein, total solids, and gamma globulin content of the colostrum did not differ between control an treatment groups;· Casein values were lower (P <.05) for the treatment group in both trials. Average daily gains from 0 to 10 weeks were .63 and .60 kg, for Trial 1; and .51 and .46 kg, for Trial 2, for induced and control calves. No differences were found in calf death loss or health disorders between groups. Similar levels of serum gamma globulin were found for both groups at 0 (before sucking) and 3 days of age in both trials. No meaningful differences were found in total serum protein, albumin, and alpha and beta globulin levels in both trials. No differences were found at birth, in chest depth, shoulder width, head circumference, hip width, and wither height of calves.

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Parasites Of Salmonid Fishes From Southcentral Alaska, James Carl Riis Jan 1974

Parasites Of Salmonid Fishes From Southcentral Alaska, James Carl Riis

Electronic Theses and Dissertations

The importance of fish parasites is directly related to the value of the fish they affect. Alaskan salmonids are extremely important and are constantly increasing in value to the United States. Other countries, such as Japan and Russia, are also finding Alaskan salmonids important as a foodstuff. If human populations continue growing at present rates, in only a few years there could be twice as many people eating fish. As a recreational asset in Alaska, salmonids rank at or near the top, both for sportfishing and as a natural attraction. It is thus important from an economic point of view …

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Population Change In West Africa : 1954-1972, Ndidi Odashionu Okwumaba Jan 1974

Population Change In West Africa : 1954-1972, Ndidi Odashionu Okwumaba

Electronic Theses and Dissertations

In the light of recent concern over world population growth, it would be interesting to study to what extent West Africa as a developing area has experienced changes in fertility, mortality and natural increase. This study would be especially interesting in that developing countries like those in West Africa account for approximately two-thirds of the world's population. Students of demography generally hold that as a rural agricultural country becomes more urbanized and industrialized, a transition also occurs in the demographic process. Under the influence of modernization, death rates decline rapidly while high fertility continues, producing a rapid population growth that …

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Peroxyacetic Acid Delignification Of Wood And Bark From Ponderosa Pine (Pinus Ponderosa), Danny C. Ronning Jan 1974

Peroxyacetic Acid Delignification Of Wood And Bark From Ponderosa Pine (Pinus Ponderosa), Danny C. Ronning

Electronic Theses and Dissertations

Ruminant species, which include cattle, sheep and goats, have the unique capability of digesting. cellulose and hemicellulose, the cell-wall carbohydrates that constitute 70 to 80 percent of wood fiber. By their conversion of these higher polysaccharides, which are indigestible by humans and other monogastrics, to animal products the ruminant species offer a potential means for solving the residue disposal problems of the wood industry while concomitantly extending the food supply for human nutrition. The ability of ruminants to digest the cell-wall carbohydrates depends on the microbial digestion that occurs in the reticule-rumen. This organ lies between the esophagus and the …

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The Erythropoietic Effects Of Dibenzyline, Atropine And Iron Dextran On Doe And Fetal Rabbits, Rex Edwin Riis Jan 1974

The Erythropoietic Effects Of Dibenzyline, Atropine And Iron Dextran On Doe And Fetal Rabbits, Rex Edwin Riis

Electronic Theses and Dissertations

The neonatal anemia of rats, swine and humans is a common physiological phenomenon. The progression of the anemia is subjected to wide individual variation and usually progresses inversely to the dam's nutrition. The neonate's nutrition also inversely alters the anemic period. The neonatal anemia does not become apparent until three to five days postpartum. The neonate demonstrates a fast-growing period following parturition with only small storage iron reserves available for the developing tissues. Consequently, there is a decrease in iron availability for normal hemoglobin synthesis and mature erythrocyte formation. The anemic neonate becomes more susceptible to disease which may terminate …

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Status Of Para-Professionals Employed In The Expanded Foods And Nutrition Education Program In South Dakota, Mary J. Fleming Jan 1974

Status Of Para-Professionals Employed In The Expanded Foods And Nutrition Education Program In South Dakota, Mary J. Fleming

Electronic Theses and Dissertations

The purposes of this study were to evaluate the general status of the program assistants in EFNEP in South Dakota and to recommend directions for improvement and revision in initial and in-service training programs designed for them.

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Gonadal Hormone Levels Prior To And Following Puberty In Straightbred And Crossbred Beef Heifers, Walter Ronald Parker Jan 1974

Gonadal Hormone Levels Prior To And Following Puberty In Straightbred And Crossbred Beef Heifers, Walter Ronald Parker

Electronic Theses and Dissertations

Five heifers from each of four breed groups (Angus x Angus, Charolais x Charolais and the two reciprocal crosses) were used in a study of gonadal hormone levels during the interval from 16 weeks before puberty to puberty (trial I). Puberty was defined as the first standing estrus. Two heifer calves from dams from each of the above breed groups and sired by a single Polled Hereford bull were used in a study of gonadal hormone levels from birth to weaning (trial II). Blood samples were collected at weekly intervals from trial I heifers before puberty and three times weekly …

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Color And Light Intensity Preferences Of Four Species Of Alate Cereal Aphids, Donald A. Dickmann Jan 1974

Color And Light Intensity Preferences Of Four Species Of Alate Cereal Aphids, Donald A. Dickmann

Electronic Theses and Dissertations

Color and light intensity preferences of 4 species of alate cereal aphids, the English grain aphid, Macrosiphum avenae (Fab.); oat bird-cherry aphid, Rhopalosiphum padi (L.); corn leaf aphid, R. maidis (Fitch); greenbug, Schizaphis graminum (Rondani); were tested under controlled conditions. No significant differences in color response were found between post-teneral (flight-active) and flight-exhausted alates of any species. Macrosiphum avenae, R. maidis, and S. graminum showed a distinct preference for yellow; R. padi usually preferred green. Alates of all species preferred high light intensities to low within the range tested (350-3500 ft-c). Preferred colors (yellow and green) were more important than …

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The Effects Of Gestation Metabolizable Energy Levels On Sow Productivity And Hematology, George W. Libal Jan 1974

The Effects Of Gestation Metabolizable Energy Levels On Sow Productivity And Hematology, George W. Libal

Electronic Theses and Dissertations

It has been estimated that of the potential ova shed by the sow on1y about 55% result in live pigs born. Reproductive inefficiency can occur as a result of oversupplying or undersupplying energy. Since 1959, the National Research Council has reduced its listed energy requirements for the gravid sow considerably. The studies reported herein were conducted to evaluate metabolizable energy (ME) levels for gestating sows at and below the recommended levels and measure their effect on sow productivity as well as sow hematology at various stages of reproduction. Two experiments, each consisting of three trials, were conducted. Experiment 1, two …

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Pine Needle (Pinus Ponderosa) Abortive Factor And Its Biological Determination, Carolyn A. Cogswell Jan 1974

Pine Needle (Pinus Ponderosa) Abortive Factor And Its Biological Determination, Carolyn A. Cogswell

Electronic Theses and Dissertations

A study was conducted to develop a reliable method to measure presence and quantity of the toxic factor in ponderosa pine (Pinus ponderosa) needles that interferes with normal maintenance of pregnancy in cattle. Special emphasis was given to biological assay sensitivity during embryo implantation and gestation in laboratory animals. The detrimental component was found to be present in both aqueous and acetone fractions prepared from ponderosa pine needles. There was a reduction in average rat litter size from bred rats fed either the aqueous or acetone pine needle extracts throughout pregnancy. Rats fed pine needle extracts from the winter pine …

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Analysis Of The Reactive Effects Of Self-Monitoring And Expectancy Instructions On Smoking Behavior, Nancy Newbold Cochran Jan 1974

Analysis Of The Reactive Effects Of Self-Monitoring And Expectancy Instructions On Smoking Behavior, Nancy Newbold Cochran

Electronic Theses and Dissertations

No abstract provided.

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The Decompostion Of Organic Matter In Two Midgrass Prairies In Western South Dakota, Venance H. Lengkeek Jan 1974

The Decompostion Of Organic Matter In Two Midgrass Prairies In Western South Dakota, Venance H. Lengkeek

Electronic Theses and Dissertations

All ecosystems have two basic biological components. One component is the autotrophic organisms which fix energy from the sun and use inorganic substances to create food. The other is the heterotrophic organisms which utilize the stored food of the autotrophs, rearrange it, and finally decompose the complex materials into simple inorganic compounds. The autotrophs, which are predominantly green plants, grow wherever the most sunlight is available, heterotrophs predominate wherever organic matter accumulates, primarily in the upper layer of the soil. Heterotrophs consist of consumers which feed on green plants and other organisms. Decomposers, chiefly bacteria and fungi that break down …

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Age-Dependent Decline In Mitogen Stimulated Protein Synthesis By C3hf, Jefferson Wardlaw Paslay Jan 1974

Age-Dependent Decline In Mitogen Stimulated Protein Synthesis By C3hf, Jefferson Wardlaw Paslay

Electronic Theses and Dissertations

No abstract provided.

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Dried Whey As An Additive For Alfalfa Haylage And As A Grain Supplement For Dairy Cows, Sitakantha Dash Jan 1973

Dried Whey As An Additive For Alfalfa Haylage And As A Grain Supplement For Dairy Cows, Sitakantha Dash

Electronic Theses and Dissertations

This research was conducted to explore the possibility of utilizing surplus whey in dairy cattle rations. Four experiments determined the influence of whey on preservation, digestibility and feeding value of alfalfa haylage. The last experiment was initiated to evaluate dried whey as a grain supplement. When dried whole whey was added at O, 1, and 10% levels to reconstituted alfalfa haylage (chopped baled hay plus 50% water) and preserved in sealed metal containers, it reduced pH, decreased acetic acid, and increased lactic acid. The general pattern of fermentation was better in whey-treated haylages than in corresponding untreated haylages. An in …

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Partial Characterization Of Animal Growth Inhibitors From Soybeans, Joseph Richard Uckert Jan 1973

Partial Characterization Of Animal Growth Inhibitors From Soybeans, Joseph Richard Uckert

Electronic Theses and Dissertations

The pH 4. 4 supernatant from raw (unheated) soybean meal was separated into 5 fractions on a Sephadex G-25 column in efforts to isolate the animal growth inhibitors present soybeans. Each fraction was added to the diet of growing mice and growth inhibition (GI) activity was determined by comparing their_ growth rates to g1"'owth rates achieved on an autoclaved soybean meal diet. Fractions I and II each contained about 50% of the GI activity, with a trace in fraction III and none in fractions IV and V. Only fraction I contained trypsin inhibitor and caused pancreatic enlargement. Fraction I was …

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The Vitamin E Status Of Lactating Dairy Cows After Receiving Stored Feeds For 15 Months, Marc Dellhime Eckhart Jan 1973

The Vitamin E Status Of Lactating Dairy Cows After Receiving Stored Feeds For 15 Months, Marc Dellhime Eckhart

Electronic Theses and Dissertations

The trend in dairying in recent years has been towards more confinement housing and higher producing animals. Such confinement housing often leads to year-around feeding of stored feeds, such as silage, haylage, and hay with no pasture grazing or feeding of freshly cut forages. Since stored feeds contain substantially less vitamin E than those same forage when freshly cut or grazed, it may be important to re-evaluate the vitamin E status of cows fed stored feeds continuously. The requirement of cattle for vitamin E are largely unknown. The one study involving adult cattle, conducted 25 years ago, found that 1.82 …

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Amino Acid Supplementation Of Opaque-2 Corn For Growing Pigs, Reid V. Merrill Jan 1973

Amino Acid Supplementation Of Opaque-2 Corn For Growing Pigs, Reid V. Merrill

Electronic Theses and Dissertations

Protein needs and amino acid requirements are of major interest in the swine industry today. A considerable amount of research has been conducted on these subjects and more is sure to follow. Amino acid content and balance are now being recognized as more important factors in swine nutrition than total protein alone. Recently, the development of opaque-2 corn with higher amounts of lysine and tryptophan than normal corn has stimulated interest in its presence in simplified diets to supply the amino acid needs of swine. Performance of pigs fed opaque-2 corn has generally been superior to that of pigs fed …

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Some Effects Of Dietary Fats Or Copper On Growth And Lipid Composition Of Turkeys And Rats, Richard A. Nelson Jan 1973

Some Effects Of Dietary Fats Or Copper On Growth And Lipid Composition Of Turkeys And Rats, Richard A. Nelson

Electronic Theses and Dissertations

During the past decade there has been a large increase of interest in what causes heart attacks. Heart attacks are claiming the lives of more and more people each year, but the exact cause(s) for this increase have not been found. Some research, however, has shown that high serum cholesterol levels are correlated with arterial plaque formation. Plaque formation has, in turn, been implicated in causing myocardial infarction and reduced blood flow to areas or the heart muscle. This results in ischemia or oxygen deprivation to that area. This condition often results in death of the individual if not …

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In Vitro Digestibility Of Diallel And Polycross Progenies Of Intermediate Wheatgrass, Ronald Theodore Thaden Jan 1973

In Vitro Digestibility Of Diallel And Polycross Progenies Of Intermediate Wheatgrass, Ronald Theodore Thaden

Electronic Theses and Dissertations

Previous forage plant evaluation by breeders has centered around agronomic factors that determine persistence and forage and seed production with little consideration given to utilization. Forages must be consumed by animals for utilization, so forage quality as it relates to the animal should be an important evaluation factor. Plants and animals function together in determining forage quality. Such plant characters as leafiness, coarseness, height and physiological age are easily observed and deternd.ne quality to a degree. Other components such as digestibility, lignin and protein are just as important, but cannot be determined as easily. Animal acceptance and consumption are also …

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Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson Jan 1973

Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson

Electronic Theses and Dissertations

Available phosphorus, organic carbon, and organic nitrogen were measured in bottom sediments of 16 lakes and ponds in northeast South Dakota. These lakes were glaciated, relatively shallow, and productive. Ranges of the surface sediments were: available phosphorus, 2 to 42 ppm; organic carbon, 0.94 to 5.34 percent; and organic nitrogen, 0.29 to 0.79 percent. Ranges of subsurface sediments were: available phosphorus, 2 to 39 ppm; organic carbon, 0.54 to 6.06 percent; organic nitrogen, 0.19 to 0.88 percent. Concentrations in most lakes varied little from top to bottom. Hard-bottomed lakes generally decreased in nutrient concentrations from sediment surface of subsurface. Lower …

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Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora Jan 1973

Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora

Electronic Theses and Dissertations

Concentration and flow of total phosphate (TP), total organic nitrogen (TON), and total organic carbon (TOC) were measured from November 9, 1971 to November 8, 1972 on the Big Sioux River, Six Mile-North Deer Creek, and Drainage M. The Big Sioux River transported 418,640 x 10 3 m3 of water, 776,880 kg TP, 599,590 kg TON, and 5,419,580 kg TOC during the study-year. Six Mile Creek transported 23,900 x 10 3 m 3 of water, 52,040 kg TP, 43,580 kg TON, and 327,860 kg of TOC. The transport of water and nutrients in Six Mile Creek per square kilometer of …

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The Primary Structure Of Nifungin, Marvin Lee Withrow Jan 1973

The Primary Structure Of Nifungin, Marvin Lee Withrow

Electronic Theses and Dissertations

The primary structure of the antifungal peptide nifungin was studied. Amino acid analysis of nifungin before and after performic acid oxidation revealed 51 amino acids and the presence of an unidentified ninhydrin positive material. The unidentified material constituted approximately ten per cent of nifungin by weight. It contains nitrogen but, as reported by others (2), did not contain phosphate or reducing sugars. It was not hydrolyzed into smaller compounds by strong mineral acids. Carboxyl terminal analysis was conducted utilizing carboxy-peptidase A and B on both the oxidized and unoxidized nifungin. Tyrosine appeared to be released most rapidly followed by lysine, …

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A Survey Of The Lunch Practices And Food Preferences Of High School Students Enrolled In The W. P. Daniel High School, New Albany, Mississippi / By Wilma Maude (Barkley) Reeves, Wilma Maude Reeves Jan 1973

A Survey Of The Lunch Practices And Food Preferences Of High School Students Enrolled In The W. P. Daniel High School, New Albany, Mississippi / By Wilma Maude (Barkley) Reeves, Wilma Maude Reeves

Electronic Theses and Dissertations

No abstract provided.

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Anaerobes Isolated From Saint Louis Bay, Mississippi, Robert Edwin Lewis Jan 1973

Anaerobes Isolated From Saint Louis Bay, Mississippi, Robert Edwin Lewis

Electronic Theses and Dissertations

No abstract provided.

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A Study Of The Feasibility Of Rainbow Trout Culture In Northern Mississippi, Marion Thomas Fannaly Jan 1973

A Study Of The Feasibility Of Rainbow Trout Culture In Northern Mississippi, Marion Thomas Fannaly

Electronic Theses and Dissertations

No abstract provided.

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Enzymatic Cleavage Of Poison Ivy Urushiol, Shi-Lan Anna K. Hsu Jan 1973

Enzymatic Cleavage Of Poison Ivy Urushiol, Shi-Lan Anna K. Hsu

Electronic Theses and Dissertations

No abstract provided.

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Arrangements For Care Of Preschool Children Whose Parents Live In The Married Student Housing Area At The University Of Mississippi, Nancy Schomberg Abney Aug 1972

Arrangements For Care Of Preschool Children Whose Parents Live In The Married Student Housing Area At The University Of Mississippi, Nancy Schomberg Abney

Electronic Theses and Dissertations

[No abstract provided.]

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Detection And Assay Of Viruses Using Latex Particles, Thomas Charles Sorensen May 1972

Detection And Assay Of Viruses Using Latex Particles, Thomas Charles Sorensen

Electronic Theses and Dissertations

When hemagglutination is caused by the virus particle itself, a particle joins two red blood cells together by forming a bridge between them. If sufficient hemagglutination particles are present, the red cells form clusters of larger aggregates which fall to the bottom of the test tube or well. It is this sort of biophysical phenomenon which is being investigated in this study. Rather than using red blood cells as the adsorbent, to the surface of which the virus adsorbs, some solid adsorbents have been utilized to substitute for the red cells in a variety of experimental manipulations. Bentonite has been …

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Germination And Vegetative Propagation Of Native Prairie Forbs, James T. Sorensen May 1972

Germination And Vegetative Propagation Of Native Prairie Forbs, James T. Sorensen

Electronic Theses and Dissertations

In the late 1960's and early 1970's there arose an increased awareness of the ecological relationships of nature to man. Although this relationship has been known for some time and numerous books have been written on the subject, public awareness has been slow in coming. But for some unknown reason man has taken a turn to nature. He is becoming more involved with conservation of nature and appreciative of its aesthetic beauty. With this new awareness there has come a new era of camping, hiking, and riding, to mention only a few activities which man needs or wants to enable …

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