Life Sciences Commons^™

Heat Denaturation Of Serum Proteins In Skimmilk And Whey As Measured By The Harland-Ashworth Test, Lynn Verl Ogden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Milk serum proteins have been shown by other workers to be partially protected from heat denaturation by the presence of milk solids (8, 15, 16) and whole caseinate (14). This study revealed that some serum proteins (B-lactoglobulin), as shown by the Harland-Ashworth test (14, 17), were more readily denatured in skimmilk than in rennet whey. A comparison of the heat denaturation rate of serum proteins in whey as opposed to those in whey containing 2.5 percent isoelectric casein was also studied. A striking protection of serum proteins seemed apparent in the presence of isoelectric casein. However, it was learned that …

Determination Of Estrone, 17b-Estradiol And Estriol In Urine Of Young Adults, Shiao-Fan Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was made of the urinary excretion of estrogens of healthy university students consuming self-selected diets living under home conditions (4 men and 5 women). Two 31-day test periods were used. During the two test periods, two meal patterns were used; three meals a day or two meals a day with no lunch. Weight was kept constant. Calories, protein, carbohydrate, and fat of their diets were calculated.

Urine specimens were collected twice a week, and additional samples were also collected on specified days for female subjects. Urinary estrogens were determined by using Brown's method (1955, 1957) with some modifications. …

Influence Of Phosphate Compounds On Certain Fungi And Preservative Effects Of The Compounds On Fresh Cherry Fruit (Prunus Cerasus, L.), William Sidney Coblentz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies were conducted using four phosphate compounds: sodium hexametaphosphate, sodium tripolyphosphate, sodium tetraphosphate, and tetrasodium pyrophosphate at 1, 5, and 10 per cent concentrations to ascertain their effects on fresh cherries, as well as their in vitro antimycotic effects against Botrytis sp., Penicillium expansum, and Rhizopus nigricans.

A. summary of the findings are as follows:

1. Sodium tetraphosphate appeared to be the most effective antimycotic compound used in this investigation. A 10 per cent concentration of sodium tetraphosphate appeared to be the most effective antimycotic compound used in this investigation. A 10 per cent concentration of sodium tetraphosphate inhibited …

Effect Of Large Doses Of Nicotinic Acid On The Lipid Composition Of Serum, Shu Hua Chen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although much information is available in which the cholesterol level and concentration of other lipids in serum have been studied, only limited data have been reported for normal human adults and concentrations of fatty acids composition of lipid classes in serum. In recent study in this laboratory, five male adults who were in good health served as experimental subjects. They were on a self-chosen diet and received a test dose of Nicospan (buffered nicotinic acid) of 2 gm per day for three weeks of a six-week test period. About 30 ml of venous blood were obtained twice weekly from each …

Lipid Composition Of Human Red Blood Cells And White Blood Cell-Platelets With And Without Administration Of Nicotinic Acid, Nuggehalli Narayan Tara

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Five normal, healthy, men (age 33-42) served as experimental subjects. The subjects were on self-chosen diets and received a test-dose of buffered nicotinic acid (Nico-Span in capsule form) of 2 gm daily for three weeks, from the second through the fourth weeks, of the six and one-half week test period. About 30 ml of venous blood was obtained twice weekly from each subject, after an overnight fast of at least 12 hours. Each subject collected a 24-hour urine sample of the day prior to the blood sampling and also kept a record of food eaten.

The blood was separated into …

Serum Lipid Components Of University Women During The Menstrual Cycle, Hih-Min Sang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Four healthy university women students (age 21-26) while on self-selected diets and living under normal living conditions served as experimental subjects in a study of changes of serum total lipids, distribution of lipid classes, and the fatty acid composition of lipid fractions during the menstrual cycle. Effect of meal frequency (2 meals vs 3 meals with no breakfast) was also included.

Total lipids were extracted from serum. Chemical determinations of total lipids, total and free cholesterols, and lipid phosphorous were made on these extracts. Concentration of cholesterol esters and phospholipids were calculated and triglycerides plus free fatty acids were calculated …

Serum Alpha-Tocopherol, Cholesterol, And Total Lipid Values And Unsaturation Of Lipids In 33- To 60-Year Old Adults On Self-Selected Diets At Different Levels Of Polyunsaturated Fat, Marjorie Miner Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The levels and weekly variations of certain lipid components were investigated in healthy adults, 33 to 60 years of age, on self-selected diets under home-living conditions with and without an increased proportion of polyunsaturated fats for a period of 26 weeks. Ten individuals served as controls and 16 were assigned to the experimental diet. Each of the groups contained an equal number of men and women. The experimental diet provided a ratio of polyunsaturated to saturated fatty acids of approximately one, with the substitution of vegetable oils for animal fats within the normal eating patterns of the participants. The control …

Effects Of Dehydration Processes With Special Reference To Microwave Irradiation On Selected Biochemical And Physical Changes In Apples (Pyrus Malus), Fredoon Shahin Nury

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many innovations have been attempted to shorten drying time or improve dehydration techniques for foods. Despite the recent advances in science and technology the bulk of dried fruit production throughout the world, over 1 1/2 billion tons (dry basis), is prepared by the energy of the sun (Copley and Van Arsdel, 1964). However, other techniques and processes for food dehydration and preservation are occupying more prominent positions in the overall production of dehydrated foods, particularly in the more advanced countries. Economics notwithstanding, it is readily apparent that dehydration as compared to sun-drying offers at least two main advantages. It is …

Amino Acids As Precursors Of Volatile Components In Tomato Fruit, Ming-Ho Yu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The composition of tomato fruit at nine different maturity stages was studied. The dry matter content decreased gradually, whereas the alcohol soluble material and non-protein nitrogen increased with ripening. Total nitrogen decreased up to the large green stage and then increased during ripening. Starch accumulated until nearly the large green stage and then diminished rapidly. Of the two components of starch, amylose decreased much faster than amylopectin, and the ratios of amylopectin and amylose thus increased during ripening. Among the amino acids, glutamic acid was present in an exceptionally high concentration, and its concentration doubled as the fruit ripened. A …

The Biosynthesis Of Aminolevulinic Acid In Relation To Iron And Enzyme, Daniel Ming-Yi Teng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The survey of plant species for aminolevalinic acid synthetase (ALAS) source was conducted. Under the conditions of this study, spinach leaves were found to be a good source of ALAS activity. The amount of amino levulinic acid (ALA) synthesized by the plant extracts was very small and was rapidly metabolized to porphyrins. ALA and porphyrin synthesis was found to be confined to the particulate fractions. Rupturing of the particles with ultrasonifier enhanced the penetration of succinyl-CoA and increased the activity. Direct study of the ALAS activity was enabled by the utilization of C¹⁴-compounds to the isolation by column …

Seed Size As Related To The Selection Of Alfalfas Resistant To The Seed Chalcid Bruchophagus Roddi, L. S. Rogers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several studies have been made by others to try to find a better method of selecting alfalfa that is resistant to seed injury by the alfalfa seed chalcid. This study investigated the possibility of using seed size as a basis of selection for resistance.

Data in this thesis show that the stage of seed development when chalcid oviposited in the seeds did affect the size of seeds. Larger seeds were infested when alfalfa seed chalcid were introduced early in the development of seeds (five days after pollination), and the total number of seeds produced was slightly greater when chalcids were …

Interaction Of Inorganic And Organic Fluoride Ions With Available Calcium On Root Growth In Triticum Vulgare, L., Subbanaidu Ramagopal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A method has been described to suspend seedling wheat roots in a saturated atmosphere. Wheat (Triticum vulgate, L.) seeds were germinated in aluminum trays and the seedlings transferred to seedling chambers. After a day's growth, the roots were treated with various concentrations of solutions containing CaSO₄, KCl, KF, NaCL, NaF, CH₃COONa, FCH₂COONa, K₂C₂O₄ and Na₂EDTA and observations were recorded 24 and 48 hours after treatment. The new root growth was described with respect to root hairs, root tissue collapse and root discoloration. Total length and …

Histochemical Investigations On The Effects Of Fluoride On Oxidative Enzymes From Pelargonium Zonale And Allium Cepa, Bachettira Wthappa Poovaiah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of fluoride fumigation on Pelargonium zonale leaves and also sodium fluoride infiltration of leaf sections and Allium cepa roots were studied in vivo.

Anatomical studies of fluoride-injured leaves showed a total collapse of the margin of the injured leaf. In injured regions the upper epidermal cells were normal and were the last to be destroyed. Detailed study of the vascular region of leaves near the injured area and also petioles from severely injured leaves showed clogging of xylem vessels by tyloses. Clogging of sieve tubes occurred, presumably, due to deposition of callose substance on sieve plates of …

Alkali Liberated Phenolic Acids From Alfalfa, Leslie Huey-Seng Huang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fourteen compounds were isolated from an alkaline hydrolyzed extract of alfalfa leaves by using cellulose thin layer plates. The R_f values, fluorescent characteristics, and color reactions were given for all the compounds isolated.

Eight of these were identified as trans-ferulic acid, trans-p-coumaric acid, trans-caffeic acid, o-coumaric acid, tricin, syringic acid, cis-ferulic acid and cis-p-coumaric acid. The identity of the compounds was confirmed by comparison of the R_f values on thin layer chromatograms, fluorescent characteristics under ultraviolet light, and color reactions of spray reagents with those of authentic samples. Three of …

Fluoroorganic Compounds In Relation To Hydrogen Fluoride Exposures In Leaves Of Glycine Max Merr., Julie Ye-O Cheng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Soybean plants were fumigated in HF and the organic acid-fractions of the leaf extracts were compared to those of the leaf extracts from soybean plants grown in nutrient solution containing fluoroacetate. The extracts from both treatments contained fluoroorganic compounds that were chromatographically similar to fluoroacetate and fluorocitrate.

The fluorocitrate separated from HF fumigated leaves was found to inhibit aconitase prepared from pig-heart. This inhibition was similar to that caused by commercial fluorocitrate and the fluorocitrate synthesized using guinea-pig kidney. The aconitase from soybean leaves was found to be sensitive to fluorocitrate as the aconitase that isolated from pig-heart. Inorganic fluoride …

Karyotype Analysis As An Index Of Radiosensitivity Of A Grass Hybrid, David R. Braegger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large differences exist between plant species in their response to ionizing radiation. The factors involved in radiosensitivities are complex and not well understood. The best criterion, so far, in studies on the acute lethal level of radiation for plant species is the average interphase chromosome volume (Sparrow et al. 1963). There are also close relationships that exist between DNA content, nuclear volume, total chromosome volume and radiosensitivity (Bowen, 1962; Sparrow et al. 1963; Sparrow et al. 1965). These investigators have observed in a series of species that an increase in nuclear volume is often accompanied by an increase in DNA …

The "Starvation Effect" And Tryptophan Pyrrolase Activity In The Vermilion Mutant Of Drosophila, Ernest E. Shelton Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The enzyme tryptophan pyrrolase is controlled by the vermilion locus in Drosophila melanogaster and is normally lacking in the vermilion mutants. During this investigation it has been demonstrated that v¹;bw flies have tryptophan pyrrolase activity when grown under near starvation conditions.

During development of the fly there is a peak of enzyme activity in the early third instar soon after the transfer to starvation medium. A second peak of enzyme activity occurs during the pupal stage. The activity in v¹;bw pupae is about 15% of the activity found in cn bw adults.

In v …

Factors Influencing Population Growth Of Tribolium Brevicornis In The Laboratory, Amin Gulla

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To determine the effect of the factors of the environment (temperature, relative humidity, and food) on the population growth of Tribolium brevicornis, different levels of temperatures from 17.5°C - 37.5°C were used. Effect of these IeveIs of temperatures was tested upon both pre-embryonic and post-embryonic development. No hatching occurred at 17.5°C, but the threshold temperature (the minimum temperature for the development) was just before 17.5°C. The optimum temperature for the embryonic development was found to be between 32.5°C - 35°C.

With the use of the saturated salt solution according to Buxton (1931) and Buxton and Melanby (1934), certain humidity …

An Examination Of A Putative System For The In Vitro Synthesis Of Drosophila Tryptophan Pyrrolase, John P. Phillips

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A system, reported by Morrison (1964), for the in vitro synthesis of Drosophila tryptophan pyrrolase has been critically studied. This putative system is based on the addition of a Drosophila "RNA" extract to a Drosophila cell-free protein synthesizing system; the synthesized enzyme is then allowed to catalyze a specific reaction, the product of which is measured by direct adsorption.

The results of this study present a three-fold argument against the interpretation of synthesis of tryptophan pyrrolase in the Morrison in vitro system: (1) RNA from a null-allele, v^36f, stimulated the same tryptophan pyrrolase "activity" in the in vitro …

A Study Of Factors Affecting The Germination Of Alfalfa And Safflower Pollen, Ling Lin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pollen grains serve a very important role in the life cycle of flowering plants, in that they are involved in the transmission of inherited characteristics from generation to generation. Because of their small size the study of pollen grains has been necessarily associated with the development of the microscope. Not until the middle of the seventeenth century, when Hooke gave the world the compound microscope, was an instrument available with sufficient power to adequately reveal the shapes of pollen grains. However, two of Hooke's contemporaries, Malpighi and Grew, who used a simple microscope, are generally recognized as the co-founders of …

A Cytological Study Of Certain Life Cycle Stage Of Eimeria Bovis, John V. Ernst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although much research has been done on the bovine coccidia little has been reported on the cytological nature of the different stages. Few descriptions of cytoplasmic structures occur in the literature. Because of the impermeability of the oocyst wall a definitive study of the nucleus in the unsporulated oocyst has not been made, nor have the nuclear changes during the two successive divisions which occur during the process of sporulation been described.

A Study Of Amino Acid, Protein, Organic Acid And Carbohydrate Changes Occurring During Germination Of Peach Seeds, Lee Chao

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Conditions required for seed germination are different among species. Some seed of tropical and subtropical plants may germinate before the maturation of their fleshy fruit, e.g. papaya species, while seed from most deciduous trees have a period of after-ripening before germination. The after-ripening period, also referred to as rest or dormancy has also been observed in some vegetable crops and ornamental flowers.

The Effect Of Protective Materials On The Overwintering Of Hardy Annuals, Candytuft And Stocks, Melvin S. Burningham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many hardy annual flowers will live through the winter if there is sufficient snow protection. Since snow cover is not consistent from year to year it has been suggested that hardy annuals planted in late summer and provided with some kind of protection before severe freezing begins will live through the winter successfully. Not only would this enable plants to bloom four to six weeks earlier, but would also enable gardeners to utilize flowers not commonly grown in northern Utah.

Some studies conducted at the Utah Experiment Station in Farmington have indicated that plants such as candytuft and snapdragons can …

A Survey Of Verticillium Albo-Atrum From Tomato Fields Of Northern Utah, Jean Redmond Musselman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Verticillium wilt has long been a major disease of tomatoes in Utah. The disease was recognized long before the causal agent was known. In 1932, Dr. H. L. Blood was given the task of investigating a wilt disease that was causing heavy losses to Utah's tomato industry (5). The disease was thought to be caused by Fusarium oxysporum f. lycopersici (Sacc.) Snyder & Hansen. Through his investigations Dr. Blood found Verticillium albo-atrum Reinke and Berthold to be the cause of the disease. He began the laborious task of finding a resistant variety of tomato and transferring the resistance to commercial …

The Comparative Costs Of Processing Frozen Sour Cherries, Utah County, Utah, 1964, Richard K. Hart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since 1905 when Professor Henry C. Taylor opened the area of economies of scale for discussion with his observations on the variables affecting farm size, agricultural economists have been concerned with scale of plant in agriculture. Considerable study and discussion have not resolved many of the questions raised in this area, but a basic framework has been constructed which can be used as a planning tool in the efficient organization and operation of plants of various sizes under given conditions.

Studies On Amino Acid Balance In Three Fish Meals, Krachang Wisutharom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

High levels of fish mean cannot be used in chick diets in the United States because of the relatively high cost as compared to soybean meal. In certain areas or countries where large amounts of fish meal are produced, it may be economically feasible to use fish meal as the major protein supplement in the poultry rations.

Feed consumed by poultry must provide most of the materials the birds need for growth or to produce eggs. Those who formulate feed must select ingredients and combine them in proportions which will allow the bird to grow or produce eggs at the …

Gonadotropic Hormone Activity In Blood And Placental Tissue Of The Bovine Early In Gestation, John E. Lunnen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Certain mammalian species have been shown to secrete extra-pituitary gonadotropins. In humans the chorionic cells of the placenta secrete a gonadotropin and in pregnant mares such a hormone is secreted by the endometrial cups. Gonadotropins of placental origin have also been observed in the rat.

The Use Of Amprolium In Controlling Coccidiosis In Lambs, Joseph E. Kuta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Young lambs are subject to severe infections with coccidiosis, which cause weight loss, morbidity, woolbreaking, and death (Christensen, 1940b; Shumard, 1957; Lotze, 1959; Smith et al., 1960). Dunlap et al. (1949) have shown that the adult sheep are reservoir hosts and are a constant source of infection to lambs. Outbreaks of coccidial infections, especially under feedlot conditions, are frequent (Newsom and Cross, 1931; Piras, 1934; Deem and Thorp, 1940; Mahrt and Sherrick, 1965).

Immunity To Ostertagiasis In Calves, Leo F. Lejambre

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parasites are responsible for heavy economic loss to the livestock industry. The losses in cattle due to parasitism can only be roughly estimated, since many cattle do not die or become visibly sick. However, there are more subtle losses such as reduced growth rate, and decreased meat and milk production (Levine, 1961). In 1954 the U. S. Department of Agriculture published an estimate of the losses in agriculture over the 10 year period, 1942-1951. At that time, the best judgement of specialists in the Department of Agriculture placed the annual loss to parasitism in cattle at $19,026,000 of which $8,989,000 …

Transfer Restrictions And Misallocation Of Irrigation Water, Herbert H. Fullerton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Water is among the most abundant of all materials known to man. In all its various forms, water covers 75 percent of the earth's surface. It is estimated that the total physical quantity of water on the earth is 326,000,000 cubic miles. This apparent abundance belies the true nature of the water resource as it relates to the needs of man. At any given point in time, only a rather minute portion of this vast quantity of water is found in those forms and locations which render it useful to man. This may be attributed to the fact that utility …