Life Sciences Commons^™

Studies On The Microcrustacea Of Three Montane Lakes In Glacier National Park, Montana, Robert O. Megard

Biology ETDs

Grinnell Lake, Lake Josephine, and Swiftcurrent Lake, at an elevation of approximately 5,000 feet in northwestern Montana, are comparable with lakes in the montane zone defined by Pennak for lakes at elevations between 8,200 feet and 10,500 feet in the Rocky Mountains of northern Colorado. Five species of Copepoda, six Cladocera, and four Ostracoda were collected in the lakes studied. The population of microcrustacea in these lakes was most dense in or slightly above the masses of rooted aquatic vegetation growing to a height of six to 10 inches above the bottom wherever the water was between three feet and …

Distribution And Variation Of Chipmunks Of The Eutamias Quadrivittatus Group In New Mexico, Eugene D. Fleharty

Biology ETDs

The purpose of this investigation, is to attempt to elucidate the taxonomic relationships between the various populations of the Eutamias quadrivittatus group of chipmunks in New Mexico and some adjacent areas.

Retention And Excretion Of Radionuclides Of The Alkali Metals By Five Mammalian Species, Chester R. Richmond

Biology ETDs

Large-volume liquid-scintillation counters were used to measure in vivo the biological half-time (BT_1/2), whole-body retention, and excretion of several gamma-emitting alkali-metal radionuclides in five species of animals.

The Influence Of Soap On Starch-Pigment Coated Paper, Paul W. Keck

Paper Engineering Senior Theses

A literature survey is presented concerning the effects of soap on the rheological properties of coatings, and upon the physical properties of the coated paper. The influence of sodium, ammonium, and calcium stearates is investigated, and it is found that soaps produce desirable effects upon both the flow properties of coating colors and the physical properties of the coated paper.

The experimental results indicate that sodium stearate is superior to either ammonium or calcium stearate, in that all of the properties tested for are either enhanced or remain about the same when sodium soap is added to the coating, whereas …

The Effect Of The Cold Soda Pulping Process On The Various Constituents Of Aspen Wood, William A. Foster

Paper Engineering Senior Theses

Literature Survey

The commercial Gold Soda Process for wood is relatively new pulping process developed at the United States Forest Products Laboratory in Madison, Wisconsin, for high-yield pulping for hardwoods.

The development of this process has been due to the increasing shortage of softwood fibers has made necessary the need for a suitable process for pulping hardwoods. The Gold Soda process is thought to meet some of the economic and strength requirements of this need.

Most of the research done on this subject has been done in the 65 to 95 yield range at the Forest Products Laboratory. This naturally …

A Comparison Of Coated Paper Surfaces By Photomicrography, Everett L. Potts Jr.

Paper Engineering Senior Theses

Five different types of coated papers were photomicrographed, namely cast coated, roll coated, trailing blade coated, air brush coated, and brush coated grades.

All cast coated papers were found to be extremely smooth and essentially free of pattern.

Roll coated papers displayed a microscopic pattern which resembled the magnified surface of an orange peel.

Trailing blade coated papers displayed sharp-edged pits and, in some cases, scuffed surfaces.

Air brush coated papers had a microscopic pattern which resembled the non-magnified surface of a pie crust.

Brush coated papers closely resembled air brush coated papers microscopically, however, they also carried a macroscopic …

Bleaching Of High Yield Mutual Sulphite Semichemical Pulp, Teodoro E. Reinhardt

Paper Engineering Senior Theses

The objective of this research project was to investigate the effect of various bleaching agents and procedures on brightness, degree of yellowness and retention of the original high yield of the unbleached neutral sulphite semichemical pulp.

In order to avoid excessive losses in bleaching of the high yield pulp, it was decided to limit the selection of bleaching chemicals to hypochlorites, peroxides and hydrosulphites. Furthermore, caustic extraction was to be employed only under relatively mild conditions as to temperature and concentration.

Based on the experimental conditions and results described in this report and on the use of an unbleached pulp …

The Performance Of A Laboratory Type Inclined Screen Washer, Philip R. Carey

Paper Engineering Senior Theses

This thesis is a study of pulp washing methods and factors influencing their operation. The literature survey is a discussion of diffusers, deckers, vacuum washers, screw presses, and inclined screen or side hill washers and methods of evaluation of washing systems.

Experimental work consisted of the analysis of the efficiency of a laboratory model inclined screen washer from the standpoint of suspended and dissolved solids removed and rate of flow. The experiments were run with deinked waste paper stock at four angles.

The results obtained indicated that an improved design of the inclined screen washer is necessary and suggestions along …

A Study Of Physoderma On Three Species Of Portulacaceae, David L. Mumford

Theses and Dissertations

Three species of the Portulacaceae each infected by a Physoderma parasite were collected at several locations in Utah. The hosts have been identified as Claytonia lanceolata Pursh., Oreobroma pygmaeum (A. Gray) Howell, and Erocallis triphylla (S. Wats.) Rydb. Since our present knowledge of Physoderma on members of the Portulacaceae is meager, it seemed desirable to learn as much as possible about the parasite, its hosts, and the relationship between parasite and host. Plants of all three hosts activated from perennating organs were grown for extended periods of time under uniform conditions. Cold treatments were most successful in activating host perennating …

A Survey Of Management Opinions Of Noise In The Pulp And Paper Industry, Carola Trittin

Masters Theses

Introduction

The pulp and paper industry is the fifth largest in the United States, dollar-wise, and is also the third fastest growing industry in the United States (1). There are between 375,000 and 400,000 people employed directly in the pulp and paper mills in the United States and Canada. A nation-wide survey on the importance of noise in this industry is needed to help clarify the effects, if any, that noise has upon its employees.

By definition, noise is non-harmonious sound. When the subject of noise is mentioned, many suggestions are given on places where such a study should be …

Natural And Experimental Infections Of Thelazia Californiensis Price (1930, Nematoda: Thelaziidae) With Descriptions Of The Adult And Larval Parasites, Howard S. Burnett

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this work was to determine the extent and effects of infestation of the eye worm of mammals, Thelazia californiensis, and to elucidate through experimentation or observation the mode of transmission.

A survey of literature revealed that thelaziasie (infestation by Thelazia species) may cause serious pathological changes in the eye and its adnexa, sometimes resulting in blindness. It was found that reports of thelaziasis in the United States were (with two exceptions) of cases in California. It was further found that T. californiensis has been reported in a wider variety of host than has any of other …

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 …

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 …

A Distributional And Taxonomic Study Of Ratibida Columnifera Var. Columnifera, Ratiba Columnifera Var. Pucherrima, And Their Hybrids In New Mexico, Walter W. Marshall

Biology ETDs

The classification and distribution of Ratibida columnifera var. columnifera Woot. and Standl. and R. columnifera var. pulcherrima (DC.) Woot. and Standl. are complex. Some floras list R. columnifera var. pulcherrima as a purple colored form or variety of the species while other authors refer to this taxon as a separate species of Ratibida. The purpose of this study is to clarify the taxonomic status of the two forms by determining and differences in morphology, distribution, taxonomy, and ecology.

An attempt has been made to determine the route by which R. columnifera columnifera and R. columnifera pulcherrima were distributed. After this …

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.

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

Theses & Honors Papers

No abstract provided.

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 …

The Effect Of Variety, Harvest Time, And Brine Separation On Thiamine, Riboflavin, And Niacin Contents Of Green Lima Beans, Prasertsri Dee-Ananta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The increasing importance of the lima beans as a substantial cash crop for the growers or farmers and as a quality food for the consumer has initiated many investigations directed towards improving its quality as a vegetable crop. Lima beans are well suited for processing; hence, studies of the quality of different varieties in relation to time of harvest have been made. Host processors are in agreement that the beans attain maximum quality before they are fully mature. After that, the yield and size increase whereas the quality decreases.

The Effect Of 2 Soil Fertility Levels On 5 Potato Varieties In Relation To Yield, Specific Gravity And Chipping Quality, Gayland D. Robison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The potato enterprise is important in Utah as it provides a cash crop and also a means of diversifying and intensifying the operations on many irrigated farms. It is of particular value in the sections of the state that have a short growing season where other crops cannot feasibly be produced. The potato chip industry supplies a demand for large quantities of potatoes. The usage by this industry makes it a major factor in potato farming economy.

The making of chips originated over a hundred years ago as the result of an accident. A silver of potato fell into a …

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, …

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 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 …

Linkage And Inheritance Studies In Barley (Hordeum), Robert E. Heiner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Barley has had wide acceptance not only as a cultivated crop but also as an excellent source of genetic material. Barley was being used in inheritance studies by Tschermak when he rediscovered Mendel's laws of heredity. Since then barley has become one of the most widely used plants for genetic studies known today.

More than 100 characters have been investigated indicating the relative ease of classification. There are 7 linkage groups corresponding to the 7 chromosomes in which 2 or more characters have been located as reported by Robertson (1939). But Kramer, Veyl, and Hanson (1954), from translocation experiments, suggest …

A Study On The Phenotypic Stability Of Selected Eastern Forage Synthetics Grown Under Utah Conditions, Don J. Heinz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The production of forage seed for use in the eastern United States is a large industry in Utah and other Western States. The development or forage synthetics in the east with production or seed in the west raises the questions “Is there a change in the synthetic when seed is produced under different environmental conditions?” To obtain information relating to genetic stability of grass and legume seed crops produced under various environmental conditions, the USDA-ARS Crops Research Division, Forage and Range Research Branch, Foundation Seed Production Section, set up several experimental plots in the western United States. These are located …

An Evaluation Of The Salt Tolerance Of Particular Varieties, Strains, And Selections Of Three Grasses And Two Legumes, Farrel John Olsen Jr

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In arid and semiarid areas in the Western United States, soluble salts tend to accumulate in the soil in amounts harmful to crop production. A considerable portion of this land cannot be reclaimed due to the poor quality of permeability of the soil. Therefore, the wise selection of crops that will produce satisfactory yields on these soils in necessary.

The salt tolerance of many crop plants has been investigated; however, more information is needed on the relative salt tolerance of varieties, strains, and selections. Such information will permit the selection and development of varieties and strains of crop plants which …

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.

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 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 …

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. …

Some Chemical Properties Of The Profiles Of Two Soil Series As Shown By Horizons And By Increments, Verle Q. Hale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Soil classification in this country is based on the system proposed by Marbut in 1920 (2). This system uses eight criteria, one of which is the chemical composition of the soil horizons. Workers in the field of soil survey are depending more and more upon laboratory data to characterize and differentiate soils not only at the series level but also at higher levels of classification where it may be necessary to establish the presence or absence of critical horizons or characteristics. This was predicted by Robinson (16) when he said that laboratory analysis is needed to give "precise physical meaning …