Digital Commons Network^™

The Comparative Ultrastructure Of The Choroid Plexus In Certain Animal Species, Norman M. Case

Loma Linda University Electronic Theses, Dissertations & Projects

Employing the electron microscope, the writer studied the ultra-structure of the choroid plexus of the lateral and the 4th ventricles of the brain in seven species of animals comparatively. No such extensive comparative investigation has been made before with this instrument. The animals represent, in the main, species which have served previously, both in physiological and light microscopical studies on this organ, and consist of several specimens each of the frog, the opossum, the hamster, the guinea pig, the rat, the rabbit and the dog.

Materials and methods. A technique of sacrificing the animal under deep anesthesia by decapitation …

The Effect Of Preweanling Administration Of Carbohydrates Used In Infant Formulas On Subsequent Dental Caries In White Rats, Erlinda Amor Romulo

Loma Linda University Electronic Theses, Dissertations & Projects

The high incidence of tooth decay, one of the most common diseases found in all age groups, gives a reason for the study of methods to prevent dental caries. Certain dietary factors, specifically carbohydrates, have been implicated in the decay process. Since diet influences both the oral and systemic environments in which the teeth develop, mature, age, and decay (1), many studies have been conducted to determine the effects of oral administration of different carbohydrates on dental caries. The extrinsic effects of diet on the mature erupted tooth have, however, been the major concern of the research (2).

The first …

Use Of The Antibiotics, Streptomycin And Terramycin, As Growth Stimulants For Orchid Seedlings, Margaret W. O'Neill

Biology ETDs

Antibiotics first came to the public's attention in 1945, when penicillin and streptomycin were released by the United States government to fight human diseases. Later, other antibiotics were released and experimental work was done on control of plant and animal diseases. By 1948 plant pathologists found that certain plant diseases such as walnut blight, tomato and pepper bacterial spot, soft rot, cucumber, downy mildew, chrysanthemum bacterial wilt, and lilac bacterial blight could be controlled by antibiotics.

Tiny, Rare Warbler Is Visitor Here, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Florida Gallinule Seen Here At Lake, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Flock Of Snowy Egrets Makes Appearance On Clear Fork 'Downtown', Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Effects Of Ultraviolet Radiation On Growth In Partially Shielded Timothy Roots, Mary Beth Picinich

Theses & Honors Papers

No abstract provided.

Kentucky Warbler (Vol. 34, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

South Dakota Farm And Home Research, Agricultural Experiment Station

South Dakota Farm and Home Research: 1949 -1998

In This Issue:
Feeding the Young Pig [p] 3
The Bronze Birch Borer and Its Control [p] 6
Horticultural Uses for Plastics [p] 10
Russian Knapweed [p] 16
Pastures in Eastern South Dakota [p] 23
Effects of Inbreeding on Dairy Cattle [p] 28
1975 Acreage Reserve Program [p] 30

An Ecological Study Of The Bottom Fauna Of Bear Lake Idaho And Utah, Earl W. Smart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In evaluating the potential ability of a lake to produce fish, probably no single standard is so important as an estimate of the amount of bottom fauna (Deevey and Bishop, 1942).

The study of the bottom fauna of Bear Lake was a part of the investigation of its limnology and fisheries, begun in 1952. This study was sponsored through federal monies made available through the Dingle-Johnson Act. The primary purpose of the study was to examine all the evidence in estimating the fish producing capacity of the lake. Bear Lake is the second largest fresh water lake in Utah but …

The Gross And Microscopic Morphology Of The Digestive System Of The Cutlips Minnow, Exoglossum Maxillingua (Le Sueur), Ira Lederman

Biology Honors Papers

This 18 page thesis describes taxonomy and anatomical characteristics of the minnow, including geographical distribution, ecology and feeding habits.

The Effect Of Certain Fluoride Sprays In The Production Of Soft Suture On Peaches, N. V. Narayanamoorthy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pollution of the atmosphere and its potential deleterious effects on health, industry, agriculture and natural resources are causing grave concern in many parts of the world. In the past century there has developed in the fields embraced by physical and biological sciences a considerable knowledge of theoretical and applied information, serving as a versatile tool in combating such problems. Air pollution problems seem to have gained much attention with the rapid development of various industries in major parts of the world. Rural and urban areas adjoining these industrial locales are confronted with the dangerous overall problems of air pollution. Evidently, …

Chlorophyll And Productivity In A Mountain River, William J. Mcconnell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigation of primary production in streams and rivers has lagged behind similar investigations in marine and lacustrine environments. Recently, however, Odum (1956) has demonstrated methods that allow the estimation of productivity of most moving waters. For reasons discussed later in this paper, Odum's method is not satisfactory for shallow, very rapid rivers as typified by Logan River. The present investigation then was primarily an exploration of a method possibly applicable to measurement of productivity in shallow rapid rivers.

Investigations of phases of the ecology and distribution of the main contributors to primary production, the benthic algae, was a necessary corollary …

A Study Of Cheese Spreads And Dips, Grant M. Steed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Each year in the State of Utah, thousands of pounds of a number of varieties of bulk and packaged cheese are returned to the manufacturing plants from the stores and other distribution points. The main reasons are: broken wrapper or rind, crushed or otherwise mutilated package, and mold development.

At the present time much of this cheese is shipped out of the state for processing. The remainder is sold at drastically reduced prices. If this unmarketable returned cheese were changed in form with good consumer acceptance the industry would experience a real savings.

Characteristics Of Manila And Related Soil Series, Flayeh H. Altaie

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In many parts of the world soils have been found that have apparently been formed under climatic conditions that no longer exist. In many places in northern Utah in areas associated with ancient Lake Bonneville, deep soils, fine-textured and non-calcareous, have been observed immediately above the highest shore line of the ancient lake. These soils have essentially no free carbonates to depths ranging from 4 to 15 feet, even though they exist on relatively steep slopes. In Davis and Utah Counties, soils having these characteristics have been given the tentative series name, Manila.

Soils studied for this thesis include one …

The Natural Reproduction Of The Cutthroat Trout, Salmo Clarki Richardson, In Strawberry Reservoir, Utah, William S. Platts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Strawberry Reservoir, Utah is an 8,000 acre lake at the elevation of 7,550 feet; it has a maximum depth of 52 feet and an average depth of 18 feet. The supply of cutthroat trout eggs used to replenish and distribute this trout throughout the state are taken from two spawning traps located on reservoir tributaries. Because it has not proven economical to raise cutthroat to a larger size than newly hatched fry, it is at this stage they are planted. Because of competition, predation, and lack of space the planting back of fry to maintain the fishery and spawning run …

Cost Of Marketing Utah Lambs At Alternative Markets, Norman E. Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Importance of lamb marketings

The production and marketing of lambs is important in Utah's economy. In 1956, Utah ranked fifth in the United States in lambs produced and saved, with 1,038,000 head produced and 840,000 marketed for consumption, table 1. Cash receipts from the lamb marketings during the year amounted to over 10 million dollars, and in addition, the state's economy benefited through revenues, employment, and raw materials which were provided by the lamb industry.

Marketing decisions

Lamb producers and handlers are faced with many decisions in marketing their lambs. They not only must decide when and where to sell, …

Linkage Relationships Of Located And Unlocated Genetic Testers In Certain Normal And Translocation Stocks Of Barley, William Ralph Andersen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Barley is an economically important cereal crop throughout most of the world. The study and elucidation of the genetic complex of this plant will add to its extensive usefulness to man, and will also provide valuable information for similar research projects on other crop plants.

Artificial Respiration During The Apnea Of Cerebral Trauma, Thorvald W. Christiansen

Loma Linda University Electronic Theses, Dissertations & Projects

Cerebral concussion often results in profound respiratory depression. The earlier workers in the field of experimental concussion concluded that artificial respiration could be a life preserving procedure in 4 many instances. More recently, however, it has been held that this form of resuscitation is of little or no value.

Because of this conflict in viewpoint and inasmuch as the latter interpretation was made as a result of studies that were not primarily directed towards assessing the worth of artificial respiration during the apnea of experimentally induced concussion, this study was planned with the hope of resolving the differences of opinion. …

The Relationship Between The Systemic Action Of Various Carbohydrates And The Development Of Subsequent Dental Caries, Pat O. O'Day

Loma Linda University Electronic Theses, Dissertations & Projects

Previous work with rats, hamsters and monkeys has shown a direct relationship between refined diets high in carbohydrates and caries susceptibility. Adequate amounts of vitamins and minerals have been shown to be necessary for proper tooth development and resistance to decay. The glycoprotein content of hamster teeth raised on a non-cariogenic Purina ration was reported to be lower than the amount found in the teeth of animals raised on a high sugar cariogenic diet.

In order to determine the caries susceptibility produced in Albino rats by different common carbohydrates, an artificial feeding technique was utilized in which the amount and …

Many Blue Herons In Area, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Life, Adventure, Death Visit Birds, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Whole Issue Nebraska Bird Review (Apr 1958) 26(2)

Nebraska Bird Review

TABLE OF CONTENTS

Yellow Warblers at the Nest ....................18

1957 Nesting Report ....................20

A Study of Bird Habitats in Alliance City Park.................... 22

General Notes ....................26

Excerpts From Letters ....................29

Treasurer's Report for the Year 1957 ....................30

Behavior Notes.................... 31

Second Annual Winter Convention ....................32

The Ants Of Dallas County, Texas, And Their Nesting Sites; With Particular Reference To Soil Texture As An Ecological Factor, Charles G. Hess

Field and Laboratory

On the ants of any particular area of Texas, virtually no papers have been published, which attempt to examine the relationships of the species to certain ecological factors. The main reasons for this, perhaps, have been the absorption of our myrmecologists in adequate identification and description of the American forms, and the difficulties involved therein. In the past few years, the foundations of our taxonomic entities have been strengthened, and such studies have come to be more appreciated. This paper deals with the ants of Dallas County, Texas, and their nesting sites, with special reference to soil as an ecological …

Louisiana Agriculture Magazine, Spring 1958, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Few Warblers On List Staying Here, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Woodpecker Tribe Is On Sad Decline, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

1958 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

Arizona Bird Life Has Wide Variety, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.

Saguaro Monument Birds Are Visited, Jessie Maye Smith

Jessie Maye Smith Birds and Watchers Columns Collection

No abstract provided.