Life Sciences Commons^™

A Study Of Detachment Of Soil By Artificial Rainfall And Its Relation To The Dispersion Ratio And Water Stable Aggregates For Nine Utah Soils, Pundlik N. Kalbhor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of soil erodibility has become of paramount interest in the last few decades. The effects of soil erosion are serious and extensive and affect nearly all people.

In general, man can do little or nothing about the geologic erosion or natural erosion in which the processes of rock weathering and soil erosion gradually wear down the earth's surface. However, human disturbance of the natural conditions of the land surface often creates accelerated erosion. Fertility of eroded soil is usually reduced measurably and crop yields are lowered considerably as erosion removes seed soil nutrients and cover crops. Loss of …

The Effect Of Various Levels Of Bicarbonate, Phosphorus, And Ph On The Translocation Of Iron In Plants, Ronald Conrad Doney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Line-induced chlorosis is a nutritional disease affecting many fruit trees, berries, ornamental shrubs, and flowers in Utah and the western United States. In fact, this disease is of wide distribution on calcareous soils throughout the world. Lime-induced chlorosis has contributed to untold economic loss and has challenged the technical ingenuity of plant and soil scientists throughout the world. As yet the exact cause of chlorosis has not been determined; consequently, no permanent cures have been found.

The first symptoms of this disease are characterized by an interveinal yellowing of younger leaves, with the veins remaining green. In more severe cases …

The Inhibition Of Germination Caused By The Lemma And Palea On Phalaris Arundinacea Seed, Nard Vee Allen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Reed canarygrass (Phalaris arundinacea) is adapted to low wet lands and survives flooding and periods of drought. Much of the valley bottom land of Utah is flooded during part of the year, yet some of this land is very dry late in the summer. This grass could become an important forage for Utah's valley bottom lands if stand establishment could be assured. Low germination percentages and long germination periods under field conditions often result in poor stands.

In most cases quick uniform germination is a decided advantage in establishing stands. Fall plantings have usually been more successful than …

The Effect Of Hydrogen Fluoride On Light And Dark Products Of Carbon Dioxide Fixation In Plants, Cleon W. Ross

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Damage to vegetation caused by fluoride compounds has been reported for a large number of plant species. In recent years toxicity to plants caused by atmospheric fluorides has been the subject of studies by a number of laboratories. These studies have been primarily concerned with determining the extent of injury caused by fluorides, describing the symptoms which occur and attempting to correlate them with the amounts of the element in the tissue and with some environmental factors. Thomas (1951) has given a general review of these subjects. Attempts have been made to control fluoride damage by spraying the leaves with …

An Inheritance And Linkage Study Of 19 Factor Pairs In Barley, Francis Cheney Lebaron

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Barley, during the past three decades, has been used considerably for the study of linkage groups and character inheritance. The commercial varieties are diploids, having seven pairs of chromosomes. Six linkage groups have been established. According to studies on interchange by Kramer et al. (1954), two linkage groups, formerly designated as III and VII, may be separate arms of the same chromosome. They are now generally considered as one linkage group.

Though more than two hundred characters have been investigated, less than sixty have been assigned relative positions on genetic maps. In many cases, selection for good characters is …

Resistance To And Transmission Of Witches' Broom And Comparative Yields Of Alfalfa Varieties In The Uintah Basin, Utah, David Val Glover

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Alfalfa is the most important forage crop in Utah. It is of particular importance to the Uintah Basin, Utah area where alfalfa hay and seed production are major sources of agricultural income. This crop owes much of its popularity to the fact that it will normally produce large yields of good forage on land which is unsuited to more intensive cultivation. In many cases it is impractical to advocate disease control practices which involve extra labor or expense and as a result most diseases of alfalfa, if controlled at all, are controlled by the use of resistant varieties.

During the …

Starch Grain Characters, Amylose, And Amylo-Pectin Contents In Relation To Pollination Time And Formation Of Cotyledons In Phaseolus Lunatus L. And Phaseolus Polystachyus L., Amrik Singh Dhaliwal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Beans are an important source of carbohydrates, proteins, minerals, and vitamins for millions of vegetarians in the world, especially in Asia. The quality and harvesting time of beans depend upon the purpose for which the beans are used. For example, for canning and freezing the beans should be harvested when they are neither starchy nor watery but should be sugary. The processing industry in Asia is not highly developed. Hence, the food is usually preserved by sun drying. Sun dried beans are often consumed the year around.

Pod setting is a problem in lima beans and in various other crops. …

A Study Of Delayed Gas Formation In Cheddar Cheese, Mark E. Oldham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During recent years, the dairy industry has been aware of a defect in Cheddar cheese known as "late gas". This causes the mechanical openings to enlarge and become shiny. In Cottage cheese the defect exhibits itself in a general lowering of the grade and quality of the finished product.

Workers in the industry have related this defect to the starter culture, although contamination of milk, equipment and cultures may also be a source. They conclude that with a source of good quality milk and proper manufacturing procedures and efficient sanitation methods, the defect may persist.

Whichever source the defect stems …

The Use Of Protease Enzymes In The Manufacture Of Cheddar Cheese, Osamu Fujiwara

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The factors governing flavor and body and texture in cheese making include the quality of the milk used, the heat treatment of the milk, the quality and quantity of the starter, the treatment during the ripening period, other biological conditions and manufacturing technics.

A Method For Determining Proteinase Activity, Bhupendra V. Randeria

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Enzymes play a very important role during the ripening process of the cheese. Enzymes are important in producing the body, texture, and flavor of the cheese. The breakdown of carbohydrates, fats, and proteins by added enzymes into different end products during the ripening of the cheese aids the process and may reduce time. The characteristic flavors of different varieties of cheeses are influenced by enzyme action. Some enzyme like proteinases can be used to improve the body, texture, and the flavor of the cheddar cheese. Addition of these enzymes during cheddar cheese making may shorten the ripening period. In order …

Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the past few years the Utah Fish and Game Department, as well as the fish and game departments of other states, has been spending fisheries money for fish eradication on both lakes and streams. The Utah Fish and Game Department recently suggested to the University that research be initiated on the subject of toxaphene as a fish poison. Consequently, a better insight into conditions that exist for a given water type could be developed.

Feeding Protein, Phosphorus And Energy Supplements To Beef Cows On Utah Desert Ranges, Robert Hyrum Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many of the beef cattle in the Great Basin area are maintained part or all of the year on rangelands. Most of those going on to desert ranges for only part of the year go on during the late fall, winter, and early spring. It is estimated that 50-60 percent of the 600,000 beef cattle grazing on range lands in Utah graze on the one-fourth million acres of desert or semi-desert sometime during the year.

A Study Of The Clover Seed Chalcid Infestation Of Various Alfalfa Varieties In Utah, Reed Charles Bunker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One of the limiting factors associated with seed production of alfalfa and certain clovers is a small jet-black wasp commonly known as the clover seed chalcid, Bruchophagus gibbus (Boheman). In alfalfa seed producing areas this insect is often referred to as the alfalfa seed chalcid or the alfalfa seed chalcis-fly. In local areas of Utah, farmers often refer to this insect as simply "the fly."

An Evaluation Of The Salt Tolerance Of Selected Clones Of Agropyron Elongatum, Jordan G. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Salt-affected soils make up much of the bottom-lands of the arid and semiarid areas of the western United States and are especially prevalent in irrigated regions. Such soils require special remedial measures, management practices, and salt tolerant crops if they are to have economic value.

Basidiomycetes Of The Mount Dellenbaugh Region Of Mohave County, Arizona, Robert Burke Mccomb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mount Dellenbaugh is located on the Shivwits Plateau bordering the north rim of the Grand Canyon in Mohave County, Arizona. The elevation of the plateau in the Mount Dellenbaugh area is approximately 6,000 feet. The dominant species comprising the flora of this region are: Pinus ponderosa, Pinus edulis, Juniperus ostiosperma, Quercus gambelli, and Artemisia tredentata.

Some Aspects Of Printing Quality, Robert B. Badger Jr.

Paper Engineering Senior Theses

The object of this experiment was to find the effect of various pressures upon the ink coverage and the visual appearance of the half-tone print. A specially designed plate with four evenly spaced elevations was used with a Vandercook proof press. Various grades of paper were used. Results showed: a variation in the range of ink coverage due to the grade of paper and the number of lines of the half-tone; within the area of good printing a small change in pressure caused a large change in ink coverage; the change in ink coverage varied from elevation to elevation; an …

Brush Finishing Of Coated Paperboard, Arlon F. King

Paper Engineering Senior Theses

Introduction

It would seem apparent that a brief explanation of the term "brush finishing of paper" is in order before dealing extensively with our literature survey. Although brush finishing is not a new term, it has never been dealt with in its true sense as a means of finishing paper in the paper industry.

Brush-enamel papers were developed and used extensively in the second half of the 19th century and early part of the 20th century. The new development came from Germany and as the art of paper coating had been developed there to a high degree, the brush-polishing process …

A Study Of The Manufacture Of Cultured Butter And Retail Store Sales In Brookings, South Dakota, Shirley W. Seas

Electronic Theses and Dissertations

Butter consumption in the united stated had dropped to 8.4 pounds per capita in 1953 from approximately 17 pounds prior to World War II. There has been only a very slight increase during the last five years. Dairy industry leaders and research workers have south to find the reason for this situation and possible remedies for it. A recent consumer preference study conducted by Rollag and Krist Janson (21) in Brookings and Sioux Falls, South Dakota indicated a fairly strong preference for high quality butter with a considerable amount of flavor obtained by adding butter culture to the butter. The …

The Effects Of Anticholinergic Drugs On Sea Anemones, Kenneth Robert Shortridge

University of the Pacific Theses and Dissertations

The first proof of the chemical mediation of nerve impulses by the peripheral release of specific chemicals was made by Loewi (1921). He demonstrated that during stimulation of the vagus nerve leading to an excised frog’s heart (Figure 1) a chemical mediator that he called Vagus-substance was released which slowed the action of the heart. This chemical mediator entered a perfusion fluid consisting of isotonic sodium chloride which was pumped out of the ventricle of the heart and diverted so as to drip onto a second frog's heart. The dripping perfusion medium slowed the pulsation of the second heart upon …

Observations On The Biology Of Pelomyxa Palustris Greeff, Collected Under Polysaprobic Conditions, Daniel Henry Stern

Master's Theses

Pelomyxa palustris Greeff, the largest rhizopod of which we have knowledge, was described in 1870 by Greeff who named the organism Pelobius. According to Penard (1902) it was redescribed by Archer in 1871 and reviewed. by Greeff (1874) who then gave it the name P. palustris.

Embryological Development Of Cucumaria Curata, Edmund Hobart Smith

University of the Pacific Theses and Dissertations

Almost no work has been done on the brooding habits of Cucumaria curata Cowles 1902 from the Pacific Coast of North America. Most of the embryological investigations of holothurians on this coast have been with species having free swimming larval forms (Johnson and Johnson, 1950). Since the majority Holothurians have planktonic larvae, a study of the direct development found in C. curate might prove beneficial in comparing the ecological distribution of this species with those having planktonic larvae. The brooding type of development is found in polar species, but seldom found in warmer waters. This may have some direct effect …

The External Morphology Of The First Zoeal Stages Of Cancer Magister (Dana), Cancer Antennarius (Stimpson), And Cancer Anthonyi (Rathbun), Robert Dotson Mir

University of the Pacific Theses and Dissertations

The literature dealing with the larva of Pacific Coast brachyuran crabs is slight. The prominent papers, those of Aikawa (1927, 1928, 1929, 1933, 1937), deal with a variety of genera and offer information useful in determin- ing family relationships. A single paper by Hart (1935) also deal with a number of brachyuran larvae found in the Pacific Ocean. None of these papers, however, identifies to species any member of the genus Cancer, although one member, C. magister (Dana) is of considerable economic importance on the pacific coast of North America. In the fall of 1958 an investigation was under taken …

A Bio-Assay And Histochemical Study Of Antidiuretic Hormone In Normal And Adrenalectomized Rats, Jean Kautz Lauber

Biology ETDs

The role of neurohypophyseal hormone vasopressin in water and electrolyte regulation has been of interest to both physiologists and clinicians. This interest has been stimulated recently by identification of the chemical structure and synthesis of this polypeptide hormone by duVigneaud and his co-workers, an accomplishment which won for duVigneaud the Nobel Prize in 1955.

Natural History Of Thelazia Californiensis Price, 1930 (Nematoda: Thelaziidae), A Mammalian Eye Worm, Warren E. Parmelee

Loma Linda University Electronic Theses, Dissertations & Projects

Various factors—embryology, host associations, and seasonal changes In eye worn populations—tending to promote the propagation of T. califomlensls were studied.

The early embryology closely parallels that of other nematode species.

The mature embryos remain alive in saline at 35°C as long as 5 days. Dead embryos can be distinguished from living ones by virtue of the rapid staining by methylene blue by the former. Parturient female thelazias release embryos into saline, and embryos are found regularly in tear secretions of infected laboratory rabbits.

Ovic embryos possess an enveloping egg membrane containing chitin. On this account, this eye worm species is …

Food Habits Of The Uinta Ground Squirrel (Citellus Armatus Kennicott) On Some Meadows Of Mt. Timpanogos, Utah, Robert K. Shaw

Theses and Dissertations

Food habits of the Uinta ground squirrel were investigated on some open meadows on the south-east slope of Mt. Timpanogos. Special emphasis was placed on species of plants eaten; and preference of plants in relation to season, succulence, and phenology. Other investigations were made in reference to: parts of plants eaten, non-plant material eaten, daily and seasonal activities in relation to foraging, feeding procedures, and the relationship between plant cover and Uinta ground squirrel activity.

Bird Populations Of The Wasatch Foothills, Delwyn G. Berett

Theses and Dissertations

One of the more interesting and unique of the natural habitats in the state of Utah is its chaparral zone, extending along the western foothills of the Wasatch Range. The purpose of this study has been to make an analysis of the bird population of this region in order to determine the comparative abundance of the species, their seasonal distribution within the area, and their ecological preferences.

Genetic Variation In Bluebunch Wheatgrass, Max P. Dunford

Theses and Dissertations

Agropyron spicatum (Pursh) Scribn, and Smith, an important forage grass distributed primarily throughout western United States and northward into Canada, exhibits considerable ecological, cytological, and genetic variation. Twenty-five populations of 100 plants each were scored to obtain data on morphological and ecological variation. Statistical analysis of the data from fourteen of the populations showed that correlations between awn divergence and length, rhizomes with number of culms, adn diameter with number of culms were inconsistent or not significant. However, the correltion between rhizomes and diameter was significant in all populations.

The Comparative Mineral Requirements Of Pioneer And Climax Range Grasses, Paul L. Steele

Theses and Dissertations

A study was made to determine the effects of variable levels of nitrogen, phosphorus, and potassium upon several species of pioneer and climax range grasses, and to determine if these grasses differ in their ability to grow when supplied with low levels of these nutrients. Five grasses were used. The climax grasses were Agropyron spicatum and Agropryon smithii, and the pioneer grasses were Aristida longiseta, Sporobous cryptandrus, and Oryzopsis hymenoides.

The External Morphology Of Pseudopanurgus Aethiops (Cresson), Glenn A. Hackwell

Theses and Dissertations

In comparing the head of Pseudopanurgus with Anthophora and Apis, the general outline appears rather similar, the most significant variation being found on the posterior surface. Extending ventrally from the postoccipital suture to the dorsal wall of the proboscidial fossa is a suture known as the fused hypostomal suture. The hypostomal area is rather small and makes up only a small portion of the dorsal and lateral walls of the proboscidial fossa, the remainder being formed by the postgena. If this is correct, the hypostomal carinae (a term with which the author does not agree) are actually located on the …

A Morphological Study Of The Subtribe Ithypori (Coleoptera: Curculionidae), Leslie J. Boothe

Theses and Dissertations

This is a morphological study of the subtrib!a Itb:ypori, undertaken to discover all that we can about the morphology and if possible justify the present classification. It includes four genera and fifteen identified species.