Digital Commons Network^™

Waterfowl Ecology And Utilization Of Uinta Mountain Water Areas, Steven Roger Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Waterfowl utilization was recorded by observing study units at different elevations from the time water areas were thawed in the spring until they were frozen in the fall.

Sixteen species of waterfowl were observed in the Uinta Mountain; mallards, green-winged teal, pintails, and ring-necked ducks were breeders.

Ninety-eight percent of all waterfowl observed were below 10,000 feet.

Waterfowl numbers were highest during migratory periods and lowest in the breeding season.

Adult waterfowl were observed most often on natural water areas and beaver ponds greater than one acre.

Water areas at lower elevations had high indices of aquatic invertebrates and contained …

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 …

An Experimental Study Of Variation Within And Between Populations Of Petrophytum Caespitosum (Nutt.) Rydb. With Emphasis On Numerical Techniques, Frank R. Drysdale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nine populations of sixty-eight individuals representing the distribution of Petrophytum caespitosum (Nutt.) Rydb. (Rosaceae) in the Intermountain Region were investigated for taxonomically significant variation using numerical techniques. On the basis of 19 morphological characters 3 subspecific taxa are recognized. Two taxa are existing subspecies: P. caespitosum (Nutt.) Rydb. var. caespitosum and P. caespitosum (Nutt.) Rydb. var. elatius (S. Wats.) Tides. One new subspecies is described: P. caespitosum (Nutt.) Rydb. var. latifolium. The ecology of the species is discussed. The floral and vegetative anatomy are described. Chromosome counts of 3 populations have given n = 9. A list of herbarium …

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 …

A Description Of The Planarian Phagocata Crenophila, New Species, From Utah, Jerry H. Carpenter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A new species of planaria in the genus Phagocata was found in several springs and spring-fed streams in Logan Canyon, Cache County, Utah. This species was named Phagocata crenophila because it greatly prefers to live in springs and it seems to be adapted behaviorally to this type of habitat. Serial sections and whole mounts were made by standard methods in order to study the anatomical features which are necessary for identification of planarians. The distinguishing features of this species are the following: testes ventral and extending from near the brain to near the posterior end, ejaculatory duct opening ventrally from …

Temperature And Inoculum Density As Factors Affecting The Pathogenicity Of Rhizoctonia Solani Kühn On Radish, Paul E. Moser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of temperature and inoculum density on the incidence of disease on radish caused by Rhizoctonia solani Kühn was studied. The fungus attacks radish at one or more stages during host development and causes pre- and pose-emergence damping-off, root rot, and storage-organ decay. The isolate of the fungus used in the study was obtained from infected radishes grown in Salt Lake County, Utah.

To determine the effect of temperature on the pathogenicity of R. solani on radish, soil temperatures of 15, 20, 25, and 30 C were used. Varying inoculum densities of 1360, 816, 408, 136, and 0 grams …

Factors Associated With The Penetration And Colonization Of Tomatoes By Verticillium Dahliae, Terry Dee Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Experiments have demonstrated that Verticillium dahliae is capable of direct cortical penetration of roots and of subsequent distribution throughout plants of both resistant (Loran Blood) and susceptible (Meteor) varieties of tomato. Plants were inoculated by the root dip method and planted in sterile soil. After one week the fungus was isolated from the upper portions of both the susceptible and resistant varieties as indicated by growth petiole sections plated on PDA. The distribution of the fungus in the resistant plants was irregular, but in susceptible plants the fungus was isolated regularly from all petiole sections. In experiments using disposable growth …

A Biosystematic Study Of The Genus Aconitum (Ranunculaceae) In The Intermountain Region, Rex Cates

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study dealt with the Intermountain aconites of which the chromosome number of n = 8 was obtained.

The bumblebees, Bombus rufocinctus Cresson, B. appositus Cresson, and B. centralis Cresson, are the major pollinators of the allogamous and autogamous aconites.

Two-dimensional thin layer chromatography of cauline leaf extracts showed that the Intermountain aconites studied here consist of one chemical group.

The overall evidence indicates that the Intermountain aconites consist of one species, Aconitum columbianum Nutt., with two varieties, variety columbianum and variety ochroleucum A. Nels.

Effects Of Two Pathogenically Differing Isolates Of Verticillium Albo-Abrum On Tomato Growth, Leonidas Berry Camp

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was performed using isolates of Verticillium albo-atrum which were reported as varying in their pathogenicities to a susceptible and resistant tomato variety. Also included as objectives in this undertaking were cross-protection and effects of spore density in the inoculum on the development and severity of Verticillium wilt of tomatoes.

After retesting the strains which were reported as pathogenic variants, results suggested that reported variabilities were non-existent in most of the isolates and instead there were only two pathogenic type-categories: (a) strains pathogenic to both resistant and susceptible tomato varieties; and (b) strains pathogenic only to the susceptible variety. …

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.

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. …

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 …

Systemic Studies Of The Genus Gila (Cyprinidae) Of The Colorado River Basin, Paul Bernard Holden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three Hundred and nine specimens of Gila from the Colorado River basin were studied. A form of numerical taxonomy, taximetrics, was used to help classify the specimens. The data from these fish indicate that many of the present hypotheses concerning their taxonomy are not valid. The concept of ecosubspecies or ecological subspecies does not fit the Colorado basin Gila. The roundtail and bonytail chubs, G. robusta Baird and Girard and G. elegans Baird and Girard respectively, currently treated as subspecies, are well separated morphologically, ecologically and reproductively and therefore are better considered two valid species. The relationship between G. …

The Eightieth Session Of The Iowa Academy Of Science And The Thirty-Sixth Convention Of The Iowa Junior Academy Of Science, April 19-20, 1968 [Pamphlet], Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

The Eightieth Session Of The Iowa Academy Of Science And The Thirty-Sixth Convention Of The Iowa Junior Academy Of Science, April 19-20, 1968 [Program], Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Protein And The Pill- A Pivotal Partnership, B. Delworth Gardner

Faculty Honor Lectures

Two fearsome possibilities preoccupy thoughtful men everywhere in the world. These worries are unique to our own age and time. Lord Russell puts it succinctly, "The world is faced, at the present day, with two antithetical dangers: (a) the human race may put an end to itself by a too lavish use of H bombs; and (b) the human population of our planet may increase to the point where only a starved and miserable existence is possible, except for a minority of powedul people."

Each of these dangers has its own characteristics, its own special perils, and its own possibilities …

Forestry Bulletin No. 16: Silviculture Of Slash Pine, Laurence C. Walker, Harry V. Wiant Jr.

Forestry Bulletins No. 1-25, 1957-1972

An analysis of the reproduction, management and destructive agents in relation to the Slash Pine.

The Effect Of Shear On Aqueous Alkaline Protein Solutions, Ronald E. Hostetler

Paper Engineering Senior Theses

The effect of shear on aqueous alkaline protein solutions of casein and a medium viscosity soybean was studied. A Haake Rotovisco viscometer and an Eppenboch agitator were used as shear sources. The light scattering technique was employed to note the changes in molecular weight.

The protein solution was sheared at 20% solids, and clarified by centrifugation and filtration. The solutions were investigated with the light scattering photometer, at pH 10.3, 13% ammonium hydroxide (based on weight of protein), 23°C and between 0.2 and 2.0% concentration.

Results showed that denaturization, causing aggregation, resulted from pressure filtration during clarification of …

The Effect Of A Weight Agent On The Process Of Waste Activated Sludge, Ciro A. Mazzola

Paper Engineering Senior Theses

The effect of clay as a weighted agent on waste activated sludges generated from the activated sludge process was measured with respect to the gravity thickening rate. In addition, final thickened sludge consistency, centrifuge and pressurized cake dryness, and filterability were measured.

Report On The Visit To Australia, Eva Crane

Journal articles

The purposes of Dr Crane's 6-week visit to Australia in October-November 1967, which was made at the invitation of the Honey Research Advisory Committee and financed by joint Commonwealth/Industry research funds, were:

• to study Australia's need in bringing the results of research in apiculture throughout the world to practical honey producers;
• to lecture on the activities of the Bee Research Association and on how the BRA can help the beekeeping industry;
• to advise State Department of Agriculture apicultural extension officers on the facilities provided by the BRA and on how to make best use of those facilities to assist in …

Whole Issue Nebraska Bird Review (April 1968) 36(2)

Nebraska Bird Review

TABLE OF CONTENTS

Growth of Nestling Goldfinches Compared to Adult Size and Differential Development Rate of Structures in Relation to their Function ......................22

Winter Meeting......................32

A Golden Eagle Nest in'the Pine Ridge......................33

1967 Nebraska Nesting Survey......................35

1967 Christmas Count......................42

1968 Migratory Bird Stamp......................46

Notes......................46

Treasurer's Report......................48

The Pecan Casebearer, Acrobasis Caaryae (Lepidoptera: Pyralidae) On Mockernut Hickory, Carya Tomentosa, Elvis A. Heinrichs

Department of Entomology: Faculty Publications

The presence of an A. caryae (Grote) larva in the terminal portion petiole apparently prevents the three terminal leaflets from developing normally. Larvae were present in the petioles from early spring until May 29. Four hymenopterous parasites were reared.

Seasonal Lipid Content Of Bagworm Larvae, E. A. Heinrichs

Department of Entomology: Faculty Publications

It is common knowledge to many who have attempted to control bagworms Thyridopteryx sp., that early instars are fairly easy to control, while later larval stages are less susceptible to insecticides. Studies of other insects (Bennett and Thomas 1963, Munson and Gottlieb 1953, Munson et al. 1954, Reier et al. 1953) have shown that as the lipid content increases, the susceptibility to insecticides (especially chlorinated hydrocarbons) decreases. To determine whether the lipid content of the bagworm larva increased with age a series of lipid extractions was conducted.

Variation Of Milk Records Within Paternal-Sib Groups, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Differences between daughter-dam and paternal sib estimates of heritability of first lactation milk yield have not been explained for New York data. Deviations of first lactation records from herdmate means of 155,070 artificially sired Holsteins were analyzed to examine the effect of unequal within group variances on the paternal sib estimate of heritability. The statistical model used to describe the data was y_y = μ + s_i + e_iy with σ ²yi = σ ²_s + = σ²_ei. Estimates of the within sire-group variances, σ₁ ²_ei, were heterogeneous (P …

1968 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

The Ias Bulletin, V2n2, March 1968, Iowa Academy Of Science

IAS Bulletin

In this issue:

--- Features pf the Eightieth Session
--- Special Reminder to Program Participants
--- Junior Academy's Thirty-Sixth Convention
--- Awards and Recognition
--- Equipment and Book Displays
--- Proceedings Progress and Problems
--- Science Teachers Short Course a Success
--- More Regional ISTS Meetings
--- Reports from Second Articulation Conference Available
--- Motel Information
--- Pre-Registration

Influence Of The Soil Environment On The Germination And Survival Of Macroconidia Of Fusarium Roseum 'Sambucinum', Ted Pass Ii

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Ted Pass II on March 1, 1968.

Aging: The Last And Greatest Challenge, Bernard L. Strehler

Henry Ford Hospital Medical Journal

The Edsel B. Ford Memorial Lectures, which are sponsored jointly by the Edsel B. Ford Institute for Medical Research and the Henry Ford Hospital, have been held annually since 1952. The following is an adaptation of Dr. Strehler's lecture before staff doctors and guests, including pathologists, physiologists, biochemists, physicists, biologists and clinicians from Michigan and Ontario.

Publications Of The Staff Of The Henry Ford Hospital And The Edsel B. Ford Institute For Medical Research

Henry Ford Hospital Medical Journal

No abstract provided.