Digital Commons Network^™

Ecological Life History Of Rudbeckia Occidentalis Nutt, Juan Arturo Florez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Phenological studies of coneflower on aspen range in Northern Utah showed that resumption of growth of mature plants begins at the time of snow melt and the initial or rosette stage is completed between mid-May and mid- June. The rate of growth in this stage is controlled by temperature, being greater at higher mean temperatures. The bolting stage is completed about 1 week after the initiation of stem elongation and the process of capitulum development is begun. Flowering is initiated between late July and mid- August. Cross-pollination is necessary for seed set which is completed by the end of August. …

A Study Of Ultrastructural Changes In Tolerant And Susceptible Lines Of Alfalfa Induced By Stem Nematode (Ditylenchus Dipsaci Kühn), Dorris C.N. Chang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fine structural analyses of host tissue (alfalfa, Medicago sativa L.) response to infection by the stem nematode (Ditylenchus dipsaci Kühn) were conducted. Hypocotyl regions were taken on 1,3 and 7 days after inoculation.

Electron micrographs of infected tissue indicated the types of damage were the same between Lahontan (tolerant line) and Ranger (susceptible line). Only the infection rate (in percent) and degree of damage were different between lines and among the different temperatures (15, 20 and 25 C). The higher the temperature, the more injury resulted. After 3 to 7 days of infection, the symptoms observed were swelling and …

An Economic Appraisal Of On-Farm Water Management Practices In Developing Countries: A Study Of Summer Rice Production In Guayas Rivers Basin, Ecuador, Thomas L. White

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to examine rice production methods, with special emphasis on irrigation-water management practices used by producers from all levels of management in the Guayas River Basin, Ecuador. To do this, rice producers were divided into four categories on the basis of the level of mechanization of their operation, use of purchased inputs, and the level of investment in irrigation facilities and general management practices. The levels of investment in irrigation facilities ranged from 7,000 to 500 sucres per hectare, and mechanization of production varied from almost total use of machinery for cultivation operations to …

An Electrophysiological Study Of The Oral Plate Sensory Organs Of The Honey Bee (Apis Mellifera L.), Rodney R. Seeley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The oral plate sense organs of the honey bee, Apis mellifera L., have been investigated employing an electrophysiological technique which allows simultaneous stimulation and recording.

The results of the study present evidence that the four bipolar sense cells innervating the sensory papillae on the oral surface of the hypopharynx are chemoreceptors. The sensory papillae respond to cations, glucose, water, and amino acids. Evidence for the absence of a mechanosensory cell is presented. The data concerning the sensory structures agree with the current theories of chemoreception.

Effects Of Dmso And Propham On Mitosis In Root Tips Of Secale Cereale, Max Rosequist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

DMSO (dimethyl sulfoxide) and propham (isopropyl carbanilate) were investigated to determine their effect singly and in combination on mitoses in rye (Secale cereale) root tip cells. Root tips were prepared for observation by the paraffin and aceto-carmine squash methods. Results showed DMSO caused the following abnormalities: arrested metaphases, multipolar spindles, multinucleate cells, stickiness, shortened chromosomes, and mitotic inhibition. Cells from propham treated root tips exhibited the same abnormalities as those treated with DMSO. In addition, propham treatments resulted in polyploid cells and chromosome granulation. In combination, DMSO and propham caused all the abnormalities mentioned above except polyploidy. In …

Investigations Of Unusual Curly Top Symptoms In Grafted Tomato Plants And Early Leafhopper Feeding Effects Upon Tomato Seedlings, Donald Eldon Gardner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To determine possible unusual effects of resistant plants upon symptom expression of curly top disease in susceptible tomato plants (Lycopersicon esculentum Mill.), tops of susceptible plants were grafted to lower stems and roots of resistant plants and inoculated. The resistant plants used were wild relatives of L. esculentum: L. peruvianum var. dentatum Dun. and L. peruvianum var. humifusum C. H. Mul. Reciprocal grafts, in which tops of dentatum plants were grafted to lower stems and roots of L. esculentum, were also made and inoculated.

External symptoms in the grafted plant tops were observed and compared with those of nongrafted, …

Student Life, April 23, 1971, Vol. 68, No. 75, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Student Life, April 19, 1971, Vol. 68, No. 73, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Student Life, March 3, 1971, Vol. 68, No. 57, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Effects Of Season And Intensity Of Use On Desert Vegetation, C. Wayne Cook

UAES Bulletins

Desert ranges of the Great Basin area support about 9 million cattle and sheep for 5 to 6 months each winter. Many of these same ranges are used by cattle year-long.

If forage is not available on desert ranges, livestock have to be wintered on farmsteads or in feedlots after they are forced from the mountains and foothills by snow. Since feeding during the winter is expensive and reduces the economic efficiency of the range livestock operation, there is real advantage in properly managing the desert ranges and conserving the supply of forage for winter grazing.

Managing desert ranges for …

Utah Science Vol. 32 No. 1, March 1971

Utah Science

Orson S. Cannon 3

Utah's tomato industry-Its development and future, J. LaMar Anderson and Alvin R. Hamson 4

Hastening green-wrap tomato ripening-with Ethrel, D. K. Salunkhe, J. LaMar Anderson, and J. B. Patil 6

Early maturing, low temperature germinating tomatoes for Utah, Orson S. Cannon 8

Accelerating tomato maturity with Ethrel-for mechanical harvesting, J . LaMar Anderson and Orlin Lusk 9

Weed control in tomatoes, J. LaMar Anderson 11

Bacterial canker of tomatoes, Orson S. Cannon 13

Greenhouse tomato production, David R. Walker 14

Freeze-dehydrated applesauce has potential-from baby food to space feeding, D. K. Salunkhe, Y. S. Lee, and …

Student Life, February 1, 1971, Vol. 68, No. 44, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Questions Version I, U.S. International Biological Program

Modeling

No abstract provided.

Proposal - July 1971, U.S. International Biological Program

Proposals

No abstract provided.

Desert Biome - Budget - 1971, U.S. International Biological Program

Budget

No abstract provided.

Hopper Version 2, U.S. International Biological Program

Modeling

No abstract provided.

Autecological Studies Of Atriplex Confertifolia And Eurotia Lanata Process Study, Martyn M. Caldwell, Neil E. West, Peter J. Goodman

Progress reports

No abstract provided.

General Catalog 1971-1973, Utah State University

University Catalogs

General Catalog of 1971-1973

Contains course descriptions, University college calendar, and college administration.

Preliminary Estimates Of Bark Percentages And Chemical Elements In Complete Trees Of Eight Species In Maine, H.E. Young

Aspen Bibliography

No abstract provided.

General Catalog 1971, Summer, Utah State University

University Catalogs

General Catalog of 1971 Summer

Contains course descriptions, University college calendar, and college administration.

Utah Science Vol. 31 No. 4, December 1970

Utah Science

Science today-agricultural practices tomorrow 87

Agriculture and social innovation, Dean F. Peterson 92

Management of crops for water use efficiency, R.J. Hanks and W. G. Dewey 94

Wildlife notes 95, 98

There is a computer in your future, Kent Bridges 96

Genetic engineering, Eldon J. Gardner 99

Utah Science index to volumes 30-31, 1969-70 103

Timber Notes 107

Utah Science Vol. 31 No. 3, September 1970

Utah Science

Malnutrition and the Affluent Society, R. Gaurth Hansen 67

Trying for Twins, Lois M. Cox and Thomas B. Follis 76

Wildlife Notes 77, 83

Economics of Feeding Grain to Cattle - on Pasture, Lynn H. Davis and Jay C. Andersen 78

Kingston - A New Lima Bean Variety Leonard H. Pollard and Alvin R. Hamson 79

Farmers Have a Choice of Taxes, Lynn H. Davis 80

Chemical Shearing Field Tests - Encouraging 83

Bee Studies Planned 83

Utah Science Vol. 31 No. 2, June 1970

Utah Science

Agriculture - food and people, Wynne Thorne 35

Getting the "inside" story, Rex S. Spendlove with Lois M. Cox 39

Wildlife notes 42

Integrated control of apple pests in Utah, Donald W. Davis 43

Effects of loose smut infection and Vitavax seed treatment on barley yields, G. l. Stoker and W. G. Dewey 46

Review of factors contributing to breast blisters, Donald C. Dobson 49

A cropping system under irrigation for certain problem areas, Gordon A. Van Epps 50

Baffling behavior - a universal riddle, Lois M. Cox 53

Animal body weight and body organs as biological indices, Joseph T. …

Development Of Eimeria Ninakohlyakimovae From Sheep In Cell Cultures, Gary L. Kelley

Biology

Monolayer cell line cultures of ovine trachea, thyroid, thymus, and kidney cells, as well as an established cell line (Madin-Darby) of bovine kidney cells, were inoculated with sporozoites of Eimeria ninakohlyakimovae and observed for a maximum of 24 days. Sporozoites were observed penetrating cells within 5 minutes after inoculation, as well as 2 and 3 days after inoculation, and leaving cells 3 days after inoculation. Transformation from sporozoites to trophozoites occurred by a widening or by a lateral outpocketing of the sporozoite body. Trophozoites and schizonts were first seen 3 days after inoculation in all ovine cell types. Large numbers …

The Effects Of Formaldehyde On The Frequency Of Reversion Of The White-Ivory Mutant Of Drosophila Melanogaster, Ruth Ellen D. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study is an analysis of the effects of formaldehyde, a chemical which is both recombinogenic and mutagenic, on white-ivory (wⁱ) a highly mutable allele of the white locus of Drosophila. Formaldehyde is shown to significantly increase the reversion frequency of wⁱ. The results of this investigation differ from earlier observations in three respects: (1) there is a positive correlation between RNA (ribonucleic acid) concentration and reversion frequency in the presence of formaldehyde, but reversion does not appear to be totally RNA dependent; (2) female germ cells are more sensitive than those of the male; …

A Comparison Of Self-Evaluation In Home Management And Achievement Motivation Of University Students In Home Management Residence Laboratory Course, Kathleen Slaugh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Self-evaluation in home management and its relationship to achievement motivation was investigated. The discrepancy between student self-evaluation and adviser evaluation was correlated with achievement motivation.

The sample consisted of 33 female students, residents of -the Home Management House during Spring Quarter of the 1968-69 school year and Fall and Winter Quarters of the 1969-70 school year.

The instruments used were: (1) a background questionnaire; (2) Management Resource Scale, and (3) Litwin Decision-Making Test. The statistical test used was the Pearson r (correlation coefficient).

No significant relationship was found between absolute discrepancy between student self-evaluation in home management, and adviser evaluation …

Survey Of Interests Of The Aged As Related To Leisure Time With Special Emphasis On Educational Tv, Jessie M. Eller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This was a study of television interests of older citizens using respondents from two geographical areas--Cache County and Salt Lake City--using random sampling, rest home, and active senior citizens.

The purpose of this study was to assist in determining program preferences for a series of television shows beamed for the aged. This involved educational television and particularly KUSU Channel 12.

The top ten program preferences, in rank order, were:

News and Current Events
Music
Travelogues
Nature Study
Drama
Health and Medical Care
Sports and Recreation
Nutrition
Hobbies and Crafts
Security-Financial Management

There are very few programs beamed for the specific …

The Influence Of Trace Elements On Anemia, Yung-Fun Wang

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

The fact that anemias constitute an important problem of public health has been realized only comparatively recently. When field surveys made in different countries before and after World War II had collected a great deal of information on dietary habits, food consumption levels, and nutritional status , it became more apparent that mild, moderate, and even severe anemic states existed in different communities. As was to be expected, anemia occurred more frequently in the malnourished people in the developing countries and the vulnerable groups of the population were the most affected (FAO/WHO Report, 1966).

Development Of A Whey-Based Lactic Culture Medium Capable Of Bacteriophage Inhibition, Chao Tung Cheng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A whey product has been formulated for use as a lactic starter medium. Phosphate-treated whey medium (PWM) has been shown to support growth of lactic cultures and prevent phage proliferation. Comparisons were made of a commercial phage inhibitory medium (PIM), reconstituted non-fat dry milk (NDM) and PWM. PWM inhibited all phages tested and stimulated starter growth. PWM was not as stimulating as PIM but was better than NDM. Good Cheddar cheese has been made using PWM. PWM is more economical than PIM but NDM is the most economical one if cheese yield is considered.

Effects Of Controlled Atmosphere Storage On Specific Biochemical Changes In Apricot And Peach Fruits, Bartley Norman Wankier

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of controlled atmosphere storage vs conventional refrigerated storage on the metabolism of Moorpark and Large Early Montgamet apricot and Elberta peach fruits were studied. The controlled atmospheres studied were 0.0 percent CO₂-5.0 percent O₂; 2.5 percent CO₂-5.0 percent O₂; 5.0 percent CO₂-2.5 percent O₂; 7.5 percent CO₂-5.0 percent O₂; as compared to conventional refrigerated storage. Nitrogen percent was assumed to be the difference between the total CO₂ and O₂ content minus 100.

Fruits were periodically removed from the storage and …