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Effects Of Ripening Processes On Chemistry Of Tomato Volatiles, Bharat Manu Shah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations were carried out to isolate, identify, and to characterize, major volatile components of tomato fruit. Simultaneously, the confirmation was extended to the reported tomato volatiles. The volatile extracts from field- and artificially-ripe fruits were compared qualitatively as well as quantitatively. The changes which occurred in the volatile components of the fruit at the onset of senescence also were delineated.

A typical chromatogram from field-ripe tomatoes contained 60 peaks. The functional group properties of individual peaks were derived by chemical analysis. The short-chain (C₃-C₆) alcohols represented 10 per cent, aldehydes and ketones 32 per cent, and …

Biosynthesis Of Piperidine-2-Carboxylic Acid In Fluoride-Necrotic Glycine Max, Susan S. Martin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Synthesis of piperidine-2-carboxylic acid (pipecolic acid) in soybean was studied by infiltration of radioactive carbon labeled precursor and by experiments using enzyme extracts from control and fluoride-fumigated plants.

Pipecolic acid was synthesized from lysine in both control and treated plants. Normal plants, in which pipecolic acid had not been detected by conventional procedures, were capable of synthesizing pipecolic acid. Greater pipecolic acid synthesis was shown in treated plants than in controls, and was attributed to increased enzyme concentration induced by fluoride treatment.

Development And Control Of Licking Behavior In The Guinea Pig (Cavia Porcellus), Jack R. Alvord

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Four non-licking guinea pigs were reinforced with water for successive approximations to licking an operandum feeder. Once all subjects had obtained their total liquid intake for a three-week period by licking, an optimum deprivation schedule was determined.

Fixed ratio and variable interval schedules were found to affect licking behavior of the guinea pig in a similar way as with the rat, mean lick rate of guinea pigs being slightly lower than that of the rat. Precise control over the onset and offset of licking was demonstrated through discrimination training.

Food And Nutritional Needs Of The World Population By 2000 A. D., Sitaram Shankar Kharbas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations were carried out to project the food needs of the world population by 2000 A. D., and to explore the possibilities of meeting these requirements.

About 70 percent of the world population presently living in developing countries do not get adequate diets, and suffer from many diseases of under-nutrition and malnutrition. They are unable to increase food production themselves. People in the developed nations have enough food and their food production is increasing at a rate faster than the rate of growth of population.

Cultivable land is the main source of food for man. The seas can also be …

Physio-Chemical And Toxicological Studies On Controlled Atmosphere Storage Of Certain Deciduous Fruits, Neil Adair Littlefield

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of controlled atmosphere on the metabolism of Golden Delicious and Rome Beauty apples, Anjou pears, and Lambert and Bing cherries were studied with respect to changes caused in the normal metabolic functions carried on during storage of these fruits. Atmospheres consisting of 1.5 per cent CO₂ and 2.5 per cent O₂ for the apples and pears and 10.5 per cent CO₂ and 2.5 per cent O₂ for the cherries were employed.

Fungi of the strains Botrytis alli, Rhizopus nigricans, and Penicillium expansum were subjected to controlled atmospheres at 21° C to determine …

Isolation, Identification, And Comparison Of The Volatiles Of Peach (Prunus Persica L., Cultivar, Gleason Early Elberta) Fruit As Related To Harvest Maturity And Artificial Ripening, Joseph Yungsheng Do

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Volatiles of peach (Prunus persica L., cultivar, Gleason Early Elberta) fruit were studied by gas-liquid chromatography, thin-layer chromatography, and infrared spectrometry. Hard mature, firm mature, soft mature, tree ripe, and artificially ripened hard mature fruit obtained from four seasons, 1964 to 1967, were used. A total of 86 peaks were observed in the chromatogram of the tree ripe peach volatiles. Major components of the volatiles identified were mainly esters, gamma and delta lactones, aldehydes, alcohols, and terpenes. In general, concentration of the volatile components were found to increase with the maturity of the fruit. However, that of the artificially …

Adaptive Changes Of Some Enzyme Activities In Rats And Humans To Dietary Protein, Jung Ja Kim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of the adaptive changes of some enzyme activities to the dietary protein intake was made in the liver, kidney, and pancreas of rats and serum of humans.

The rats fed the 40 per cent casein diet had a higher rate of weight gain and the weights of the liver and kidney were higher than in the rats fed the 10 per cent casein diet.

Three enzymes involved in the elimination of excess nitrogen from the body were found to show a similar response to increased dietary protein intake. These enzymes were: D-amino acid oxidase in the kidneys, arginase …

Extraction Of Rennet From Fresh Frozen Vells, Neil Harvey Clarke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A method was developed for the extraction of rennet from fresh frozen vells. Frozen vells were partially thawed and minced in a Hobart "Wonder worker." The tissue was treated with 2.0 per cent potassium alum and allowed to stand for 20 hours before sufficient 0.45 M disodium phosphate was added to bring the pH of the mixture to 5.7. Dry sodium chloride was added until the salt concentration in the moisture of the mixture was 10 per cent. The tissue was then mixed with 3/4-inch pumice gravel in a volume ratio of 1 to 2 and packed into extractor columns. …

Relationships Between Foster Home Placement And Later Acculturation Patterns Of Selected American Indians, Robert Dean Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A survey was made of the graduates of an educationally-oriented church-sponsored foster home placement agency. The subjects for the study had been graduated from high schools in Idaho, Arizona, Canada, and throughout Utah. There were 235 students graduated during the period 1954-1967. The survey of these subjects was made by the use of the mailed questionnaire method. Responses were received from 165 (70.21 percent) of the subjects.

The investigator was searching for modal patterns of behavior among the graduates. Some significant trends seem to be emerging in their post-high school activities. Implications for future studies of the culturally disadvantaged are …

Development And Evaluation Of A Waiver Examination For The Introductory Foods Course At Utah State University, Virginia Clark Bragg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A written objective-type waiver examination for the introductory foods course at Utah State University has been developed and evaluated.

Results of the study showed that the examination improved with revision. In addition, it was found that there was a statistically significant relationship between the score students achieved on the waiver examination and the total numerical score representing the final grade in the basic foods course.

There was apparently no significant relationship between the number of years experience students had in food preparation, the type of experience in food preparation, and their performance on the waiver examination. Apparently depth of knowledge …

The Effect Of Oven Temperature, Cooking Method, And Breed On The Tenderness, Juiciness, And Flavor Of Beef, Carma B. Stembridge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of oven temperature, dry-roasting, and breed on the eating quality of beef was determined by sensory and objective methods. Two adjacent standing rib and two adjacent chuck roasts of prime, choice, and good grades from animals of Hereford, Shorthorn, and Charolais breeding were dry-roasted. Control roasts (9-12th ribs) were cooked at 325 F. Experimental roasts (6-8th rib and two chucks) were assigned an oven temperature of 325 or 250 F at random. All roasts were allowed to reach ah internal temperature of 155 F as recorded on a potentiometer.

Tenderness, as determined by a Warner-Bratzler shear, was greater …

5 Β- Pregnane- 3Α- 20Α- Diol Excretion In Urine Of University Women During The Menstrual Period, Rita Shin-Hui Liao

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Five normal healthy young university women while on self-chosen diets and living under normal conditions served as experimental subjects in this study. Urinary pregnanediol was measured for 10 days of the menstrual cycle. Meal frequency (3 meals vs. 2 meals with no breakfast) was also included in the study.

A modification of the method of Eberlein and Bongiovanni on thin layer chromatography was used to determine pregnanediol in the urine sample.

Urine pregnanediol excretion was in the pattern as investigated by other workers. The values rose in the latter half of the menstrual cycle, and fell prior to the onset …

Influence Of Pre-Fermentation Inoculations With Leuconostoc Mesenteroides And Lactobacillus Plantarum On Physico-Chemical Properties Of Fresh And Dehydrated Sauerkraut, William T. Nabors

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect Leuconostoc mesenteroides and Lactobacillus plantarum has on the physical and chemical properties of fresh and dehydrated sauerkraut was tested. Sauerkraut inoculated with L. plantarum was slower in fermenting and significantly lower in acidity and higher in pH. Dehydration of sauerkraut by freeze-conventional hot-air and micro-wave processes produced a significant loss in volatile components, ascorbic acid , lactic acid and an increase in pH. Each of the dehydration processes caused browning of the sauerkraut . These changes were less with freeze-drying and increased with conventional hot-air drying and microwave drying. Gas-liquid chromatography confirms the loss of volatile components …

Comparisons Of Phytoseiid Predator Populations In Sprayed And Unsprayed Apple Orchards In Cache Valley, Utah, Yeboa A. Dodoo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A comparative study of phytoseiid populations was made of two well-cultivated and regularly sprayed apple orchards with two unsprayed orchards in Cache Valley, northern Utah.

Two phytoseiid species, Typhlodromus mcgregori Chant and T. occidentalis Nesbitt were observed on the apple leaves, under the bark, and occasionally in the litter and soil. Amblyseius cucumeris (Oudemans) occurred in the soil and litter and occasionally under bark. T. mcgregori was dominant in the unsprayed orchards, and T. occidentalis in the sprayed.

Of the phytophagous mites, which served as food for the phytoseiids, the two-spotted mite, Tetranychus urticae Koch was dominant. Other phytophagous mites …

Effect Of Gibberellic Acid And Chilling On Nucleic Acids During Germination Of Dormant Peach Seed, Yuh-Nan Lin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of nucleic acid changes influenced by gibberellic acid and chilling treatments in peach seed was performed in an attempt to reach a better understanding of the mechanism involved in breaking seed dormancy.

Gibberellic acid and the chilling treatment increased the RNA content. These two treatments which break dormancy also increased RNA, suggesting a similar mechanism involving RNA. Chilled seeds contained more RNA than did the gibberellic acid treated seeds.

DNA content remained unchanged regardless of treatment.

Dry seed had a greater ribonuclease activity than with soaked seeds. Enzyme changes did not correlate well with the RNA content in …

Consumer Attitudes Affecting The Use Of Fluid Milk Products In Metropolitan Salt Lake City, Wayne N. Monson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A survey of 360 respondents in metropolitan Salt Lake City was made to determine their attitudes about fluid milk products and the affect of these attitudes on consumption levels. The fluid milk products studied were regular whole milk, two percent milk, skim milk, and nonfat dry (powdered) milk.

The respondents had the most positive attitudes about regular whole milk. Their attitudes about the other three products were highest for those which most nearly resembled regular whole milk. The consumption levels of the four products followed the same pattern.

The respondents' attitudes about four attitude parameters affected their consumption levels. Those …

Distribution And Ecology Of The Desert Bighorn Sheep In Southeastern Utah, Lanny O. Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In May 1965, the first investigation and research in the native desert bighorn sheep in Utah was undertaken. The study was centered in the White Canyon area, San Juan County, in southeastern Utah. Seven other areas along the Colorado River were found to have smaller reminant populations of desert bighorns.

The White Canyon population was determined to be between 124 and 144 desert bighorns (Ovis canadensis nelsoni), excluding lambs.

The desert bighorns in southeastern Utah return from surrounding range lands each year to the same areas, known as lambing grounds, to give birth to their lambs. Ewes under …

Seasonal, Diurnal And Species Variation In Forage Moisture Content In Relation To Site On Mountain Summer Range Of Northern Utah, Chaudhry Mohammad Sharif

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Practical assessments of range production and utilization are based on forage weight estimates. In preparing these estimates moisture content in green vegetation offers some problems. The moisture component is not likely to be constant for a given species. Diurnal, seasonal and site variability have been well illustrated for agronomic and tree species (Salisbury, 1848; Jenkins, 1879; Miller, 1917; Pearson, 1924; Watkins, 1940; Parker, 1951; Ackley, 1954; Werner, 1954; Zohary and Orshan, 1956; Slatyer, 1959; Kozlowaki, 1965 and Jame son, 1966). Since variability is also likely for range plants, computations made on green weights are apt to be fallacious. It is …

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 …

Venison Flavor: The Free Fatty Acid Content Of Fat From Lean Meat Tissue, Von T. Mendenhall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Millions of pounds of venison are harvested each year in the United States. Over 12,000,000 pounds of dressed venison are harvested during the regular season each year in the State of Utah. The hunters of venison contribute approximately 10 1/2 billion dollars to the economy of the state for licenses, lodging, transportation, and other expense of hunting. In many cases this source of meat is a significant part of the household meat supply. Venison is often wasted, however, because of its undesirable flavor. The lack of knowledge as to the causes of variation in venison flavor has prompted this study. …

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 …

Comparative Effects Of Dehydration Processes On Physico-Chemical Changes In Fruits, Chang Yong Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Drying with the help of sun and wind is one of the oldest methods of food preservation known to man, but artificial drying, or dehydration, has been developed and used extensively only during the last two decades. The problem in dehydration is that the water content must be decreased sufficiently to maintain the stability of the product by retarding the rates of deteriorative biochemical, microbiological, and enzymatic reactions during subsequent storage. At the same time irreversible changes should not be brought about.

The Impact Of European Economic Integration On Israel's Export Of Oranges In 1970, Moshe Gottlieb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis is an attempt to evaluate quantitatively as well as qualitatively possible future developments in international trade of oranges and tangerines, and the possible impact of these developments on the export of oranges and tangerines by Israel.

After World War II, international trade in oranges and tangerines increased rapidly, mostly as a result of the rapid rise in standards of living and the improvements in diet habits which took place in many countries at that time. These favorable marketing conditions encouraged the planting of new groves in the citrus growing areas of the world and particularly those of the …