Life Sciences Commons^™

Short-Term Growth Response To Fertilization In Young Quaking Aspen, Keith Van Cleve

Aspen Bibliography

No abstract provided.

Nematosporaceae (Hemiascomycetidae): Taxonomy, Pathogenicity, Distribution, And Vector Relations, Lekh R. Batra

Ba

For almost a century (42, 139) certain yeast, or yeastlike parasites of fruits and seeds have been known. They occur on a wide variety of crop plants and cause such diseases as stigmatomycosis," "yeast-spot," "eye spot," and "internal rot." They seemingly represent a phylogenetic unit. They have cylindrical or pyriform asci, and the hyaline ascospores often are characteristically arranged in two fascicles lying end to end. All have acicular ascospores. (See figs. 2, a-c; 5 , c; 11, hand i; 12, A; 13, c-h; 15,j-k.) They have similar habitats, and several species may simultaneously occur in the same fruit or …

Toxicity Of Pesticides And Other Agricultural Chemicals To Honey Bees, E. L. Atkins, E. A. Greywood, R. L. Macdonald

An

The California beekeeping industry of more than 600,000 colonies produced in 1965 an income of nearly $8,500,000 (Stanger, 1966). In addition, honey bees are annually used to pollinate California crops worth $200 million. For the past 80 years this import

Continued Studies Of The Status, Socialization, And Relationships Of Isle Royale Wolves, 1967-1970., Michael L. Wolfe, Durward L. Allen

Aspen Bibliography

No abstract provided.

Community Characteristics Of Six Burned Aspen-Conifer Sites And Their Related Animal Use, Larry H. Kleinman

Aspen Bibliography

No abstract provided.

Path-Coefficient Analysis Of Correlation Between Honey Bee Activity And Seed Yield In (Allium Cepa L.), N. S. Shasha'a, William P. Nye, W. F. Campbell

All PIRU Publications

A path-coefficient analysis was used to furnish information on the inter-relationships of pollinating insect activity and components of seed yield in inbreds of Allium cepa L. The inbreds differed very significantly in their attentiveness to pollinating insects. Only one inbred exhibited a significant correlation (P <0.05 positive) between numbers of honey bees and seed yields. Separating the correlation coefficients into components of direct and indirect effects indicated that pollination attractiveness was not the limiting factor in seed set for inbreds in the experiment. Moreover, most of the variation in seed yield could be attributed to indirect effects on the components of yield, umbels per plant, flowers per umbel, percent per fertilized flower, and seeds per fertilized flower.

Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor, D. C. Prusso

Memorandum

No abstract provided.

Nutritional Anemias In Selected Countries, Wun-Yuan Mei

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Blood is a constantly changing, highly complex tissue which is concerned with the transport of cell nutrients, the elimination of wastes, and the maintenance of chemical equilibrium. The mature red blood cell takes about seven and half days to develop, then has a life cycle of 120 days. Many factors are involved in this complicated process. Many nutrients are required for the frame-work of the red blood cells and in the hemoglobin within these cells.

Anemia is a condition in which there is a reduction in the total circulating hemoglobin. Anemias may be described biochemically in terms of lowered hemoglobin …

An Approach To Range Inventory For The Annual Range Type Of The Arid And Semi-Arid Regions Of The Sudan, Farid D. Iskander

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Range inventory, by definition, is the evaluation of the range resources to determine a proper and safe level of stocking and to provide a record of vegetation and vegetation changes (Stoddart and Smith, 1955). Range survey is defined by the Range Conservation Glossary, Soil Conservation Service (1944) as "a systematic and comprehensive inventory and analysis of the range resources and related management problems of a range area for the purpose of developing plans of management therefrom." Accordingly, range inventory is the quest for basic information about rangelands and the development of guides and procedures for their management, improvement and efficient …

A Study Of The Traditional Grazing System Of The Nomadic Rezeigat In Darfur Province Of The Sudan, Moustafa Ahmed Rahama

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The Sudan is a country of Africa of nearly 1 million square miles (Fig. 1) with a population of 16 million people and lying between 3 and 21° latitude. In the tropical climate over 100°F can be recorded during any month of the year.

Cytogenetic Effects Of Vitavax Fungicide On Secale Cereale On Allium Cepa, Jack Ernest Staub

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Vitavax fungicide (2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin) on meiotic chromosomes of rye (Secale cereale) and mitotic chromosomes of onion (Allium cepa) and rye were observed.

The principal aberrations recorded in pollen mother cells of rye were: 1-4 univalents at metaphase I; sticky bridges at telophase I; and micronuclei and misshapen nuclei at the quartet stage.

The principal aberrations recorded in root tip mitoses in onion and rye were: chromosome fragmentation, disintegration, clumping, aggregation and inhibition of mitosis.

All meiotic phases were significantly affected by 1,000, 5,000,10,000, 33,300, 66,600 ppm Vitavax at the 48, 72, and 96 hour …

Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark

Memorandum

No abstract provided.

Proteolytic Activity Of Soil Microorganisms, Robert T. O'Brien

Memorandum

No abstract provided.

A Linear Programming Decision Model For Elk And Deer Management On The Logan Peak Winter Range Area, Ronald P. Grove

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

One consequence of our surging human population is the corresponding increased level of resource consumption. This occurrence renders it imperative that resource managers intensify their management of the world's natural resources. Failure to improve management techniques involving the use of these resources will result in premature depletion of non-renewable commodities and severe checks on the vigor of renewable resources.

Management is faced with the difficult task of searching for astute means of allocating natural resources. Because of the tremendous size and complexity of the natural world, the problem can be extremely complicated.

Mathematical techniques have proved useful in providing natural …

Range Improvement By Waterspreading In The Gash Delta, Kassala Province: Democratic Republic Of The Sudan, Farid D. Iskander

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The area north of latitude 14° north in the Sudan is characterized by unreliable precipitation patterns and a high incidence of a drouth period following the first rain of the "rainy season." In this region it is not uncommon to have a completely dry year without a single rain shower. The damage occurring to the plant cover when a drouth period follows the first rain is great. This is especially the case for the annual plant species in that such precipitation distribution patterns tend to exhaust the seed supply in the soil and do not supply adequate moisture for seed …

Modification Of Ontogenic Expression Due To Relocation Of The Ry+ Gene In Drosophila Melanogaster, Allen A. Badgett Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ry⁺ gene of Drosophila melanogaster and its associated enzyme, xanthine dehydrogenase, were employed in an analysis of the relationship between regulation and the location of a gene in the genome. Enzyme assays as an indication of gene activity were performed on genotypes containing zero, one and two doses of ry⁺ genes. Xanthine dehydrogenase activity of rosy genes in normal and relocated positions was determined during development.

The results indicate: 1) the gene ry⁺ is differentially active during ontogeny; 2) the activity during ontogeny is proportional to the number of ry⁺ genes present in the genome; …

Incorporation Of Protoporphyrin Ix Into Chlorophyll A And Purification And Properties Of (-) S-Adenosyl-L-Methionine-Magnesium Protoporphyrin Ix Methyltransferase, Jii Shieh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Experiments on the incorporation of ¹⁴C-protoporphyrin IX into chlorophyll indicate that ferrous iron may be involved in reactions between protoporphyrin IX and chlorophyll. Experiments using both health and chlorotic tobacco tissue for incorporation studies show that incorporation of protoporphyrin IX into chlorophyll was activated by Fe²⁺.

S-adenosylmethionine-magnesium protoporphyrin IX methyltransferase (E.C.2.1.1.11) which catalyzes the reaction between S-adenosylmethionine and Mg protoporphyrin IX to form S-adenosylhomocysteine and Mg protoporphyrin IX monomethyl ester was demonstrated in barley seedlings. Methyltransferase was found principally in whole chloroplasts and fractions containing mitochondria were disintegrated chloroplasts. Use of detergent Tween 80, precipitation with protamine …

A Description Of Anglers And Angling Use In Two Areas Of The Uinta Mountains, John F. Hoagland

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The High Uinta Primitive Area, Utah's most popular high mountain recreation area, has a reputation as an excellent trout and grayling fishery. Proposed for inclusion in the National Wilderness Preservation System, the area faces several management dilemmas. The primary problem being that managers must protect the resource from the effects of heavy recreational use without destroying the primitive and aesthetic dimensions of wilderness environment. It appears that much impact on the more accessible lakes is due to fishing use. The objectives of the study were: (1) to determine the proportions of angling to non-angling groups; (2) to describe certain characteristics …

Team Rules And Regulations Used By Football And Basketball Coaches In Utah High Schools, Robert Kent Molgard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to gather and analyze information concerning the establishment and administration of specific team rules and regulations used by the football and basketball coaches in Utah High schools.

Sub-objectives of this study were: (a) to compare the opinions of coaches according to school classification - class AA, class A, and class B; (b) to compare the opinions of less experienced coaches with those of more experienced coaches; (c) to compare the opinions of basketball coaches with those of football coaches.

One-hundred and thirty-nine coaches responded to a questionnaire that included statements asking for information concerning …

An Evaluation Of Stress Induced Mortality Of Stocked Catchable-Sized Rainbow Trout In Temple Fork Of The Logan River, Robert Earl Gresswell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The level of stress imposed by population pressure, handling and live transportation on planted catchable-sized rainbow trout in a northern Utah stream was examined. Production of adrenocorticotrophin, as measured by interrenal ascorbic acid and serum cortisol levels, did not occur in transported or planted fish.

Dead or moribund fish collected from stream or live boxes comprised 13 percent of the 2,000 fish planted. Aeromonas salmonicida, the causative agent of furunculosis, was isolated from 41 percent of 106 moribund fish sampled. In addition, 39 percent of the samples exhibited bacterial growth other than A. salmonicida. Apparently, handling, transportation, and planting did …

The Local Interest As A Consideration In The Planning Of Highway Construction In The Canyonlands Region Of Southeastern Utah, Robert L. Barry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An examination was conducted of the potential of proposed highway construction for serving the needs and interests of the population of the Canyonlands Region of southeastern Utah. The history of the highway development issue in the region was first examined with special attention given to the local position on the issue as expressed by local government spokesmen. Next, the total system of development proposals for the region was divided into four sections using criteria of area served and degree of controversy. A map analysis was conducted to determine how these four separate proposals would serve transportation needs of the region. …

Economic (Linear Programming) Model Of The Farming Region Served By The D.M.D.A. Irrigation Company, Delta, Utah, Francisco Zarzalejo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The main objectives of the study are to create a linear programming model of the study area in order to estimate changes in benefits when water delivery system losses are assumed to be affected by shifting between rotation, demand and continuous flow management systems,

Approximately 7,000 acres are included in the program model and the estimated potential "gains" or benefits from distribution system loss "savings" due to more efficient delivery range from $6,000 to _ $12,000 per season. This result is influenced by the facts that the - loss estimates are hypothetical and the system studied is in an area …

Phosphate Requirements For A Whey-Based Lactic Bacteriophage Resistant Medium Under Ph Control, Napasri Ausavanodom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Five strains of lactic cultures and their homologous bacteriophage races were examined for response in a whey-based medium under pH control and fortified with zero to two percent levels of added orthophosphates. One percent each of culture and phage was inoculated into each medium, which was incubated at 25 C and continuously neutralized at pH 6.3 with 20 percent NH₄OH. Growth response in media was compared against growth in non fat dry milk and a commercial phage inhibitory medium (Marstar).

The whey-based medium which had been frozen and thawed provided more effective growth response and greater phage protection …

Formation And Control Of Chlorophyll, Solanine Alkaloids, And Sprouts Of Potato (Solanum Tuberosum L.) Tubers And Carbonyl Compound Of Tomato (Lycopersicon Esculentum Mill.) Fruits, S. J. Jadhav

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Part I. Formation and control of chlorophyll, solanine alkaloids, and sprouts of potato (Solanum tuberosum L.) tubers

Incorporation of radioactive carbon from acetic acid-2-¹⁴C (sodium salt), β-hydroxy-β-methylglutaric acid (HMG)-3-¹⁴C, L-leucine-U-¹⁴C, L-alanine-U-¹⁴C, and D-glucose-U-¹⁴C into the predominant glycosidic steroidal alkaloids, ⍺-solanine and ⍺-chaconine of potato sprouts was 4.88, 9.0, 15, 24, and 20 times less than that of mevalonic acid (MVA)=2-¹⁴C (DBED salt), respectively. The efficiency ratio revealed that β-hydroxy-β-methylglutaric acid (HMG)-3-¹⁴C was incorporated via acetate or acetoacetate. The distribution of radioactivity originated from D-glucose-U-^{14 …}

Absorption, Translocation And Metabolism Of 1,3-Dichloropropene In Selected Plants, David L. Berry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The absorption, translocation and metabolism of 1,3-dichloropropene (a soil fumigant) in bush beans, tomato and carrot was studied under growth chamber and greenhouse conditions using solution culture, vermiculite and sand. Absorption was monitored using gas chromatographic analysis and isotope techniques. Plants were shown to absorb a maximum amount of dichloropropene by 24 to 48 hr from solution culture and vermiculite. The plant absorbed and translocated 1,3-dichlorpropene-¹⁴C-U readily to aerial parts of the plant.

Bush beans, tomatoes and carrots absorbed and translocated 3-chlorallyl alcohol-¹⁴C-U from solution culture and vermiculite. Levels of 3-chloroallyl alcohol reached maximum at 24 …

Control Of Rat Testicular Monoamine Oxidase Activity: Age, Seasonality, Melatonin, Hcg, Fsh, Starvation And Irradiation, Ronald Lee Urry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A number of investigations were undertaken to determine what factors control testicular MAO activity. Activity was high in neonatal rats (19 g - body weight), showed a reduced activity at 53 g, was increased at 145-235 g and showed a progressively reduced activity at 415 g, 482 g and 650 g. Hypophysectomy of immature male rats at 3 weeks of age, or mature rats at 10 weeks of age, significantly reduced testicular weight and total MAO activity as calculated on a per animal basis. The specific activity of the enzyme, as expressed on a per mg of tissue basis, was …

Temperature Effect On Leaf Water Potential Measurements, Rex J. Prosser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silver foil psychrometers were used to monitor water potential in different portions of maize leaves which were subjected to temperature gradients. The psychrometers were preliminarily calibrated over standard NaCI solutions at temperatures ranging from 5°C to 45°C in an aluminum plate apparatus designed to provide uniform temperatures within each psychrometer even while overall temperature was changing. Based on the calibrations, empirical temperature correction equations were derived and used to correct psychrometer readings at different temperatures to equivalent values at 25°C. Temperatures on a single maize leaf were varied by placing the long leaf through an insulated box with several compartments …

Studies On Some Bacteriolytic Bacteria Isolated From An Oxidation Pond, Paul Christian Radich

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During bacteriological studies of the Logan City Sewage Oxidation Ponds, Logan, Utah, a group of bacteria was discovered which could lyse killed cells of Escherichia coli. The present research effort was an attempt to determine whether two isolates from this earlier study might play a role in the reduction of coliforms and other bacteria in the oxidation ponds. It was also desired to characterize partially the lytic enzymes produced by the two isolates and to determine as far as possible the organisms' identity.

Both isolates were Gram negative rod-shaped organisms with a single polar flagellum. On Cytophaga agar they …

Biology Of Mimulus Guttatus In Thermal Areas In Yellowstone National Park, Wyoming, Barbara Rice

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mimulus guttatus populations in Yellowstone Park were studied in relation to their thermal habitat. Thermal areas have an extra-solar heat source, and are not snow covered in winter. Snow depth on adjacent non thermal soils may exceed 1 meter. The hypothesis that these populations have formed a distinct high temperature tolerant race was tested.

Thermal populations form two categories, based on habitat type: plants on sinter and plants in boggy areas. Plants growing on sinter are dwarfed, with an average height of 5.6 ±. 2.2 cm. They are facultative annuals which germinate in the fall, overwinter as rosettes, and flower …

Mechanisms Of Population Regulation In Confined Colonies Of Peromyscus Maniculatus (Wagner) And The Response To Exploitation, Donna Corn Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wild-trapped and laboratory-reared Peromyscus maniculatus (Wagner) were raised as confined colonies indoors with various stocking densities ranging from 0.026 to 0.100 mice per sq. ft. in pens of 40, 77, and 154 sq. ft. The animals were individually tagged and all pens were censused at weekly or semi-monthly intervals to record animals present, body weights, food consumption, and overt reproductive condition. At the termination of each experiment, all mice were necropsied and organ weights of gonads and adrenals recorded. Histological sections were made of the testes and ovaries. Half the colonies were subjected to density-independent exploitation by removal of 50% …