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Full-Text Articles in Life Sciences

A Revision Of The Bee Genus Epeolus Latreille Of Western America North Of Mexico, Richard L. Brumley May 1965

A Revision Of The Bee Genus Epeolus Latreille Of Western America North Of Mexico, Richard L. Brumley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Members of the genus Epeolus are small to medium-sized wasp-like bees which parasitize the colletid genus Colletes. Twenty-two species and two subgenera are recognized in this work.


Investigations Into Flavor Chemistry With Special Reference To Synthesis Of Volatiles In Developing Tomato Fruit (Lycopersicon Esculentum Mill.) Under Field And Glass Greenhouse Growing Conditions, K. B. Dalal May 1965

Investigations Into Flavor Chemistry With Special Reference To Synthesis Of Volatiles In Developing Tomato Fruit (Lycopersicon Esculentum Mill.) Under Field And Glass Greenhouse Growing Conditions, K. B. Dalal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The common tomato of our garden belongs to the natural order Solanaceae and the genus Lycopersicum. The name from lykos, a wolf, and persica a peach, is given to it because of the supposed aphrodisiacal qualities, and the beauty of the fruit. By culture and use it is a vegetable, botanically it is a fruit and among the fruits, it is a berry being indehiscent, pulpy, with one or more seeds that are not stones.


California Mastitis Test Scores Of Individual Quarters Compared With Composite Milk Samples And With Milk Leucocyte Counts, Joseph R. Quayle May 1965

California Mastitis Test Scores Of Individual Quarters Compared With Composite Milk Samples And With Milk Leucocyte Counts, Joseph R. Quayle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Udder inflammation, whether caused by bacterial, physical, or neurological means, usually results in the secretion of milk that is abnormal in character.


Effect Of Fluoride On Respiratory Enzymes In Soybean Leaves, Arthur Chiu-Eng Lee May 1965

Effect Of Fluoride On Respiratory Enzymes In Soybean Leaves, Arthur Chiu-Eng Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There are many reports relating the effects of fluorides on plant respiration. Fluoride has been regarded as an inhibitor of respiration. Warburg et al. (1942) demonstrated that fluoride inhibited enolase activity, therefore, decreased the respiration rate of yeast. Miller (1958), found a similar inhibition of enolase from pea seed. Bonner (1948), Bonner and Wildman (1946), and Laties (1949) reported that the fluoride ion in culture solutions reduced the respiration rate in Avena Coleoptile, spinach leaves and barley roots. Since the inhibition was reversed by the addition of pyruvate, they concluded that the inhibition of respiration was due to the inactivation …


A Study Of 5-Fluorouracil: Its Effects And Mode Of Action In Drosophila Melanogaster, John B. Jenkins Jr. May 1965

A Study Of 5-Fluorouracil: Its Effects And Mode Of Action In Drosophila Melanogaster, John B. Jenkins Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations involving the fluorinated pyrimidine, 5-fluorouracil, and its effects on viruses, bacteria, plants and mammals, have brought to light the following facts: FU inhibits the growth of bacteria, plants and mammalian cells and it decreases the ability of certain viruses to produce progeny. In other words, FU is an antimetabolite that inhibits growth and/or reproduction. Two mechanisms have emerged from these studies to define the mode of action of FU. The first mechanism involves the incorporation of the compound into the RNA of the organism thus altering the base sequence and creating a non functional or damaging nucleic acid. The …


Physiological And Biochemical Factors Influencing The Quality Of Canned And Freeze-Dehydrated Applesauce, Yuen San Lee May 1965

Physiological And Biochemical Factors Influencing The Quality Of Canned And Freeze-Dehydrated Applesauce, Yuen San Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Applesauce has long been considered an important food product in the United States. Approximately 25 percent of the fresh apples used by the industry in the U.S. are converted into sauce. Recent statistics indicated a further increase in consumption (Canning Trade Almanac, 1964). The reason why so large portion of the crop have been utilized for sauce manufacture is that we can use the desirable varieties for blending techniques in making sauce, and its fine particle character has some advantages as a kind of baby food.

According to the U.S. standard grades of canned applesauce, Grade A (Fancy) applesauce should …


Seasonal Habits And Habitat Of The Ruffed Grouse In The Wellsville Mountains, Utah, Robert L. Phillips May 1965

Seasonal Habits And Habitat Of The Ruffed Grouse In The Wellsville Mountains, Utah, Robert L. Phillips

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ruffed grouse (Bonasa umbellus incana) inhabits much of the deciduous woodland of northern and central Utah. Its distribution is confined mainly to the Wasatch and Uinta mountain ranges. It has been observed in willows (Salix spp.) at 5, 000 feet elevation and in Douglas-fir (Pseudotsuga menziesii) at 9,000 feet.


A Survey Of The State Of Utah For Areas Infested With The Stem Nematode Of Alfalfa, Dwayne R. Buxton May 1965

A Survey Of The State Of Utah For Areas Infested With The Stem Nematode Of Alfalfa, Dwayne R. Buxton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant nematodes belong to a large group of invertebrates known as round worms, They derive their name from the Greek word "nema," meaning thread. In literature some authors refer to nematodes as nemas. In England and many parts of the United States, plant-parasitic nematodes are called eelworms.

While some damage to plants results from mechanical injury, salivary secretions injected by the nematode into the plant are usually the major cause of damage. Experiments conducted in the first part of the present century have demonstrated large differences in plant growth in soil infested with nematodes and soil freed of nematodes by …


Some Movements Of Black-Tailed Jackrabbits In Northern Utah, Donald H. Rusch May 1965

Some Movements Of Black-Tailed Jackrabbits In Northern Utah, Donald H. Rusch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This work describes the extent and pattern of some black-tailed jackrabbit (Lepus californicus) movements and areas of activity in northern Utah and their relationship to sex and age, and season of the year.

Black-tailed jackrabbits are the most common lagomorphs in much of the western United States, particularly in that vegetational association described by McDougal (1908) as the sagebrush desert. Furthermore, Adams and Adams (1959) have suggested a correlation between sagebrush (Artemisia tridentata) incidence and jackrabbit density.

Farmers often regard this species as a liability because of its depredations on alfalfa (Medicago sativa), crested …


Saponin Content Of Lahontan And Du Puits Alfalfas, George Allan Taylor May 1965

Saponin Content Of Lahontan And Du Puits Alfalfas, George Allan Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Primitive peoples have used saponins for many years to kill fish and as a detergent.


Demand For Boating In Selected Counties Of Northern Utah, Harold D. Morris May 1965

Demand For Boating In Selected Counties Of Northern Utah, Harold D. Morris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Each year many new families enter the recreational boating force. Boat ownership throughout the nation has increased over the past few years until it no longer appears to be a status symbol, but merely a very popular means of increasing family enjoyment of the great out-of-doors.


Venison Flavor: Study Of Volatile Compounds In Cooked Deer Meat, Praful C. Vin May 1965

Venison Flavor: Study Of Volatile Compounds In Cooked Deer Meat, Praful C. Vin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Venison meat has a characteristic flavor which is acceptable if mild but some venison has a strong and objectionable flavor. The subject is of practical importance where deer is hunted as sport and for food. Each year in the State of Utah, over 180,000 hunters go in search of deer and over 130,000 animals are killed. This contributes about 10 1/2 million dollars to the economy of the state from licenses, lodging, transportation and other expenses of hunting. The problem is not only important in Utah but also in the U.S.A. and other parts of the world where venison is …


Existing And Potential Outdoor Recreation Resources In Bear Lake Valley, Utah And Idaho, Dennis H. Black May 1965

Existing And Potential Outdoor Recreation Resources In Bear Lake Valley, Utah And Idaho, Dennis H. Black

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Providing adequate outdoor recreational opportunities to the public is now a national problem. Of the many influences affecting the demand for recreation, increased income, population increase, sociological changes, and rapidly increasing technological developments are the more important. In the face of these factors, we must plan better to insure sufficient future needs. This will require evaluation and development of many recreation opportunities.

The Bear Lake are of northeastern Utah and southeastern Idaho is situated along U.S. 89 and within close driving distance of much of Utah's population. Up to the present there has been little orderly or planned development of …


Effects Of Variety, Maturity, And Storage On Quality And Nutritive Value Of Certain Processed Fruits, Captain Noel Scholes Schvaneveldt May 1965

Effects Of Variety, Maturity, And Storage On Quality And Nutritive Value Of Certain Processed Fruits, Captain Noel Scholes Schvaneveldt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The fruit production industry is of significant economic importance in the state of Utah. The annual receipts by the producers of fruit is usually between $3,000,000 and $5,000,000 according to Utah Agricultural Statistics (1963). With the farmer receiving only about 38 percent of the consumer's dollar this amounts to approximately $9,000,000 to $15,000,000 total contribution by the fruit industry. The recent trend, however, is a slight reduction in acreage, number of farms, and total production of fruit.

One of the major problems of the fruit industry and all agriculture in the state is the small size of the farms. In …


A Longitudinal Study: The Relationship Of Various Physical Characteristics To Serum Cholesterol In Preadolescents And Adolescents, Carol Ann Milligan May 1965

A Longitudinal Study: The Relationship Of Various Physical Characteristics To Serum Cholesterol In Preadolescents And Adolescents, Carol Ann Milligan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although many theories have been formulated concerning atherosclerosis and its relationship to the incidence of coronary heart disease, few actual facts are known. It is known that atherosclerosis is very complex and appears to be influenced by many factors. It is postulated that an elevated serum cholesterol level is one predisposing factor.

Serum cholesterol levels are likewise influenced by many factors. Age, sex, body build, exercise, socio-economic levels, smoking, health status, weight loss or gain, dietary fat, endocrine function, and stress have been shown to be related to serum cholesterol levels, and according to some authors also are related to …


Activation Of Prorennin At Low Ph Values, Nazar A. Shukri May 1965

Activation Of Prorennin At Low Ph Values, Nazar A. Shukri

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rennin is the main milk-clotting enzyme in the fourth stomach of young calves. This enzyme has been crystallized and studied by several workers such as Hankinson, Berridee, and Ernstrom, and found to be heterogeneous. It is a proteolytic enzyme, which exhibits its maximum activity on hemoglobin, bovine serum albumin, and casein in the region of pH 3.4 - 4.0. It has a specificity similar to, but narrower than, that of pepsin.