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The Utah Statesman, June 18, 1984, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, May 9, 1984, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, May 2, 1984, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Nutritional Ecology Of The Northern Pocket Gopher: A Study Of Nitrogen Balance, Miki M. Stuebe

Biology

The northern pocket gopher, Thomomys talpoides, is probably not able to maintain nitrogen (N) balance in winter in northern Utah if it eats only belowground plant material typical of that found in the caches it makes. Gophers burrowing 10 h/day would meet about 81% of their daily N requirement on such a diet, which has a true N digestibility of 49.0%, and a biological value of 90.6%. However, gophers could easily meet N requirements in winter by consuming material only slightly higher in N than cached material. High-N material (both plant and animal matter) is probably available to most …

An Electron Microscopic Study Of The Gill Chamber Of A Dragonfly Nymph (Odonata:Anisoptera), Patricia Bohm Trostle

Biology

The respiratory chamber of the dragonfly nymph, Aeshna multicolor, was studied by means of scanning and transmission electron microscopy. Transmission electron micrographs enable several cellular types, includig two epithelial types, to be distinguished within the individual gill fold. Epithelial cells located basally on the gill fold show features of an osmoregulatory tissue. Cuticle limiting these cells is thinner than-that of typical epithelium, the plasmalemmae are infolded enclosing numerous mitochondria, and a system of extracellular channels is located basally with mitochondria and glycogen seen in the basal cellular outfoldings. Tracheoles are rare. Epithelial cells more distally placed are typical of …

The Effect Of Reproductive Phase And Hormone Treatment On Receptor Sites For Reproductive Hormones In The Ewe, Jane R. Mole

Biology

Groups of at least six ewes each during the estrous and anestrous seasons were estrus synchronized using progesterone implants and superovulated using follicle stimulating hormone (FSH) or pregnant mare serum gonadotropin (PMSG), or left as nonsuperovulated controls. Ewes were sacrificed 30 h after removal of implants. The hypothalamus, adenohypophysis and ovaries were removed and frozen in liquid nitrogen. Frozen sections of all tissues were incubated with radiolabeled hormones to determine location and quantity of receptor sites. Slides were dipped in autoradiography emulsion and allowed to self expose 10 days before they were developed and stained. Slides were then examined using …

A Lactic Culture Stimulant Blend From Kluyveromyces Fragilis And Whey, Steven L. Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A buffered growth medium was developed that sustained a significantly greater concentration of various strains of Streptococcus lactis and Streptococcus cremoris than did milk. The active buffering ingredients of this medium were magnesium hydroxide, ammonium and sodium salts of phosphate and citrate. This medium was entitled Lactic Culture Buffered Growth medium (LABGRO) and possessed about 8 times the buffering strength between pH 6.6 and 5.1.

Significant differences in growth and acid production rates were noted among Prt+ and Prt- lactic strains evaluated. Also noted were significant differences in cellular acid production rates. The two Prt- strains having the slowest growth …

Protein Recovery And Coagulation Properties Of Commercial And Fractionated Milk Clotting Enzymes, Khalida A. Shaker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Protein recovery and coagulation properties of five commercial and fractionated milk clotting enzymes were studied. The fractionated enzymes were Sephadex G-100 fractions of the commercial enzymes. Milk clotting activity of each fraction was tested using Berridge substrate. All fractions from each preparation which had milk clotting activity as measured with the Formagraph were collected and pooled. These samples and the original enzyme preparations were used to coagulate milk. Percent of protein lost in whey was determined by Kjeldahl. Coagulation was followed using a spectrophotometer monitoring changes in apparent absorbance at 600 nm. Curd protein yields using the five original enzyme …

Comparison Of Several Forms Of Equations For Predicting Cheddar Cheese Yield From Milk Composition, Craig A. Moore

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to evaluate several forms of equations for predicting Cheddar cheese yields based on the fat and protein content of milk and moisture content of cheese. Production and quality control data from a Cheddar cheese plant for one entire year was used. This included the pounds of milk that went into each vat of cheese, yield of cheese from each vat, cheese moisture from each vat, and fat and protein percentages of the milk.

Seven models were derived to predict the yield of Cheddar cheese. The seven models were statistically fitted to the data by applying the …

The Relationship Between Milk Composition And Swiss Cheese Yields, Adnan S. Ba-Jaber

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

From Cache Valley Dairy Association in Smithfield, Utah, milk from two to three cheese vats plus the corresponding Swiss cheese trimmings, salted cheese, and whey were sampled each week from October 1981 to October 1982. The weights of the Swiss Cheese were recorded. Milk samples were analyzed for fat and protein; cheese samples were analyzed for fat, protein, and moisture; whey samples were analyzed for fat.

By using Gauss-Newton nonlinear Least Squares method of iteration, the data was analyzed. Two formulas for predicting Swiss cheese yield were derived. A good relationship was found to exist between Swiss cheese yield and …

Synthesis Of 6-Aminopenicillanic Acid-Protein Conjugates For Development Of Enzyme Immunoassay For B-Lactam Antibiotics, Alice Ann Heth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An enzyme immunoassay specific for several β-lactam antibiotics rather than individual antibiotics was investigated. The goal to develop an enzyme immunoassay for analysis of a whole class of compounds at one time is different than the goal of most enzyme immunoassays which desire specificity for drugs or hormone levels. Detection of the presence of all β-lactam antibiotics is wanted and identification of specific antibiotics is not needed.

6-Aminopenicillanic acid, the common structural moiety of β-lactam antibiotics was used tin this investigation. Methods of preparation of 6-aminopencillanic acid conjugates and antibodies needed for enzyme immunoassays have been developed. 6-Aminopenicillanic acid was …

Some Indicators Of Manganese And Copper Adequacy In Some Infant Formulas For Baby Pigs And Infants, Robin Hope Marcus

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of the study was to ascertain whether some infant formulas provide sufficient amounts of manganese and copper for adequate nutrition, Twelve piglets, within the first week of life, were divided by sex, litter and weight into two treatment groups. Both groups received concentrated Isomil, a soy-based infant formula and distilled water ad libitum. Isomil was analyzed and found to contain 1.05ppm manganese and .98ppm copper. The supplemented group received an additional 30.6mg manganese and 6.76mg copper per can (388ml) of concentrated Isomil. Weight gains were not significantly different. Manganese and copper levels were significantly greater in the …

Survival Of Porcine Pepsin During Cheddar Cheese Making And Its Effect On Casein During Cheese Ripening, Gheyath H. Majeed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A modification of a linear diffusion test for measuring milk clotting enzymes at concentrations of 1 x 10^-4 to 1 x 10^-1 chymosin units/ ml was developed to permit quantitative assay of porcine pepsin in Cheddar cheese with a standard deviation of 6%. The amount of porcine pepsin retained in Cheddar cheese curd was dependent on pH of milk at setting. Milk at pH 6.6, 6.4, 6.2, and 6.0 was set with porcine pepsin, acidified with lactic acid and glucono-~-lactone and made into Cheddar cheese. After pressing the corresponding curd contained 0, 3.64+0 .12 %, 4.79+0.52%, and 5.94+0.30% …

Effect Of Casein/Fat Ratio On Milk Fat Recovery In Cheddar Cheese, Nana A. Yiadom-Farkye

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cheddar cheese was made by the traditional 4.5-h method from three experimental lots of milk, each standardized to casein/fat ratios of approximately 0.64, 0.67 and 0.70. The effect of casein/fat ratio on milk fat recovery was determined. The effects of milk composition on curd firmness at cutting, cheese composition and resulting yield of cheese were evaluated. Correlations between milk constituents and various cheese components were obtained. Milk fat recovery was unaffected by casein/fat ratios within the limits of 0.64 and 0.71. Average milk fat recovery was 91.58 ± 1.73%. Cheese yield was a function of milk protein, milk fat and …

Dietary Intake Of Persons With Type I Diabetes Who Use Continuous Subcutaneous Insulin Infusion Pumps, Laurie J. Schaetzel-Hill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To date there have been no complete reports of the nutrient intakes of persons with Type I diabetes mellitus who use continuous subcutaneous insulin infusion (CSII) pumps. The purpose of this study was to describe the sample population and to determine the nutrient intake of adult Type I diabetics from the Salt Lake City, Utah area, who use CSII.

Seven male and 15 female CSII users, ages 25 to 53, completed a questionnaire and a three-day diet record as instructed. Diet records were coded and household measurements of foods were converted to gram weights for computerized nutrient analysis. Nutrient intake …

Evaluation And Improvement Of Coagulation Properties Of Milk For Manufacturing, Leslie M. Okigbo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A rugged and sensitive instrument "Vatimer" was developed to evaluate the coagulation properties of milk in cheese vats. Microvolt signals from the instrument varied with standing-wave motion of milk, forces arising from coagulation, curd firming, curd syneresis and also clean-in-place spray forces. Curd firmness at cutting varied three to four fold in commercial Cheddar cheesemaking operations.

The Formagraph instrument was used to select individual cow milk samples with good and poor chymosin-coagulation characteristics from the Utah State University Holstein herd. Blending 50% good-, and 50% poor-coagulating samples did not improve average coagulation properties of poor samples. Higher chymosin concentration caused …

Effects Of Folic Acid Or Zinc Malnutrition On Rotaviral Infection In A Murine Model, John Douglas Morrey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influences of dietary deficiencies of folic acid or zinc on rotaviral disease infant mice were studied. Preliminary studies indicated that bovine and simian rotaviruses, but not porcine rotavirus, caused diarrhea in infant mice. Bovine and porcine rotaviruses were not, however, sufficiently infectious to replace murine rotavirus in studies utilizing the murine model. It was also determined that murine rotavirus purified by a cesium chloride gradient was highly infectious and useful for subsequent studies on nutritional influences of rotaviral disease. In dietary studies, female Swiss Webster mice were fed diets containing deficient, moderately deficient, or adequate levels of folic acid …

Effects Of Clearcutting On Forage Production, Quality And Decomposition In The Caatinga Woodland Of Northeast Brazil: Implications To Goat And Sheep Nutrition, Robert D. Kirmse

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Clearing of trees from the so-called caatinga woodland that characterizes the vegetation of the semi-arid region of northeast Brazil offers possibilities for increasing forage production. This research analyzed the first-year effects of clearing caatinga on dry season forage for goats and sheep. In addition, factors affecting litter decomposition on cleared and uncleared caatinga were assessed to evaluate the viability of deferring grazing of forages during the wet season for use later in the dry season.

Removing the trees resulted in a sixfold increase in production of herbaceous vegetation, however, 88 percent of the increased yield on the cleared areas was …

Improvement Of Deep Tubewell Irrigation Project Performance In Bangladesh, Md. Mirjahan Miah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A computer model for use in predicting the impact of various improvement options on command area expansion of a deep tubewell irrigation system has been developed. A field study was conducted on 11 selected deep tubewells located at two sites, namely Dhamrai and Thakurgaon, in Bangladesh to collect necessary physical data to provide irrigation engineering insight and a basis for testing and application of the model. The results of the investigation revealed that the actual discharge of most of the deep tubewells was lower than the design or rated capacity. The duration of pump operation in the majority of the …

Electrophoretic Patterns Of Storage Proteins In Phaseolus Prone To Cotyledonal Cracking, Zahra N. Hashim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cotyledonal- or transverse-cracking (TVC) in certain cultivars of snapbeans, Phaseolus vulgaris L., seeds, clearly evident during germination, seriously places affected seedlings at a competitive disadvantage. TVC is an inherited trait and occurs across cell walls of cotyledons rather than along cell walls. Thus, it might be hypothesized that internal pressure resulting from swelling of storage proteins during imbibition might account for cellular rupture. To further elucidate this possibility, experiments were designed to compare electrophoretic patterns of storage proteins from seeds of snapbeans resistant and susceptible to TVC, and to correlate the different patterns of polyacrylamide gel el ectrophoretograrns of …

An Economic Analysis Of Food Policy In The Ivory Coast, Yao Prao Felix

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ivory Coast covers an area of 124,000 square miles with reasonable rainfall for food crops production. But besides what has been called the economic "miracle," the country relies on increasing food imports (rice, wheat, meat, and milk products). At the same time, the country's earnings from the major export commodities are shrinking. So the primary objective was to identify the main causes and circumstances that have resulted in reductions in food production. The major hypothesis was that the present situation is simply the result of policies that have favored cash crops relative to good products. A formal treatment and an …

Chemical Composition And Acceptability Of Rain Damaged, Field Dried Alfalfa Hay, Cesar Augusto Araque H.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Water was applied to swaths of cut alfalfa forage with oscillating sprinklers to stimulate rain damage to field drying alfalfa hay to determine the changes in chemical composition, loss of yield, and acceptability of rain damaged hay to sheep. An additional objective was to develop models to estimate yield losses form experimental hay. The experimental hay was prepared with a 2x2x4x4x2 factorial design. The factors were two different cuttings (July and September), two width of swath (3.05 m and 4.27 m), four times of applying artificial rain (3h, 8h, 13h, and 24h after cutting), four levels of artificial rain (no …

Combined Scale Weight, Height At Hips And Visual Condition Score As An Indicator Of Functional Body Size In Range Cows, Patricia B. Davis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thirty-five range cows of various breeds were obtained for the study. Body measurements taken were live weight and hip height and all cows were condition scored for level of fatness. The cows were slaughtered and the following morning several carcass measurements were taken and the plate was removed from the left side. These plates were boned and the remaining flesh ground for chemical analysis of percent carcass fat. Regression equations were calculated for estimating percent carcass fat from condition score, weight:height ratio and hip height (R²=.765). However, condition score alone is the single best estimator for percent carcass …

Influence Of Breed Type, Milk Production Potential And Cow Size Upon Maintenance Requirements, Jacqueline Lee Kennedy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two biological types of cows, straightbred Herefords (HxH) and Simmental-Hereford crosses (SxH), of similar body condition were individually fed over a 10 week period to compare the biological types for maintenance and to determine the influence of milk production potential and of size. Cows were nonlactating and in the last part of the first trimester of pregnancy. During the first 5 weeks of the feeding experiment, one-half of each type was fed 75% of estimated maintenance while the other half was fed 125% of estimated maintenance. During the last 5 weeks of the experiment those fed at 75% of maintenance …

Range Beef Cattle Productivity In Southern Utah, Mouslim A. Maiga

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Twenty-six range beef cattle ranches in southern Utah were surveyed by personal interview to obtain production data. The data were used to characterize the level of production efficiency in terms of calving rate, weaning rate, weaning weight, and net weaning weight in these operations; and to identify factors associated with differences in productivity.

The data revealed that productive efficiency was generally lower than the potential.

Mean calving rate of cows exposed for breeding was 83.4%. Stepwise regression involving calf death losses at or shortly after birth and heifer replacement rate accounted for 98.3% of the variance in calving rate. Calving …

Forage Quality Comparison Of Burned And Nonburned Aspen Communities, Deborah L. Blank

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objectives of this study were to assess the effects of prescribed burning on herbaceous and browse forage quality in the aspen forest type for elk and domestic sheep.

Plant samples of selected forage species were taken from burned and nonburned plots within three different prescribed burns in southeastern Idaho. These samples were analyzed for in vitro dry matter digestibility, crude protein, calcium and phosphorus. Data were analyzed using the analysis of variance.

There was little improvement in forage quality as a result of prescribed burning, with some reduction in quality in 1983 exhibited by pinegrass (Calamagrostis rubescens). …

Plant Monoterpenoids As Factors In Diet Selection And Grazing Behaviour Of Sheep, Wilson Kimuti A. Yabann

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Grazing trials were conducted in west-central Utah in August and November, 1983. Sheep were stocked in 0.06 hectare paddocks containing a homogeneous stand of the shrub big sagebrush (Artemisia tridentata subsp. tridentata). Stocking rate was 1344 animal-unit-days per hectare. Close observation was made of plants and plant parts of the sagebrush that the sheep consumed or refused to consume. Similar samples were hand-harvested from browsed and rejected plants and plant parts. These samples were later analyzed in the laboratory for monoterpenoid content, crude protein levels and digestible organic matter.

There was large variability of monoterpenoid concentrations from plant …

Effects Of Diflubenzuron When Fed To Adult Female Alfalfa Weevils, Mohamed M. Middib

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this project was to evaluate diflubenzuron ovicidal effects on adult female alfalfa weevils Hypera postica in the laboratory. There was little relationship of weevil mortality to dosage or length of exposure of the adult to the chemical. An indirect result of diflubenzuron was an increase in muscardine fungus (Beauveria Sp.). Other effects of the chemical on the adults were yellow deposits and tissue extending from the tip of the abdomen.

The main effect of dilfubenzuron when fed to female alfalfa weevils was on the eggs. The effects were dosage related, especially on eggs viability. The viability was …

The Utah Statesman, April 25, 1984, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

The Utah Statesman, April 13, 1984, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.