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Articles 4111 - 4140 of 4342

Full-Text Articles in Life Sciences

End Matter, Vol. 8 No. 1 Oct 1966

End Matter, Vol. 8 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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The Sphaerodactylus Decoratus Complex In The West Indies, Richard Thomas, Albert Schwartz Aug 1966

The Sphaerodactylus Decoratus Complex In The West Indies, Richard Thomas, Albert Schwartz

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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End Matter, Vol. 7 No. 4 Aug 1966

End Matter, Vol. 7 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Ecological Relationships Of The Aquatic Macroinvertebrates Of The Cascade Springs Area, Eugene Clark Devenport Aug 1966

Ecological Relationships Of The Aquatic Macroinvertebrates Of The Cascade Springs Area, Eugene Clark Devenport

Theses and Dissertations

The U.S. Forest service, recognizing the scenic, scientific, and educational value of the Cascade Springs area near Mount Timpanogos, has set aside and begun development of this spot for the use of the general public. As part of their preparatory work they have asked that examination be made of the flora, fauna 9 and physical features which may in part be incorporated into public informational facilities being constructed at the springs.

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Small Mammal Invasion Of A Trapped-Out Habitat, Lester Dennis Flake Aug 1966

Small Mammal Invasion Of A Trapped-Out Habitat, Lester Dennis Flake

Theses and Dissertations

Small mammals, with their numerous adaptations, have successfully inhabited most biotic communities. Interactions arising from competition among small mammals in these communities may lead to a rather complex social organization with poorly defined boundaries which limit the movement of individuals. Important among these are territorial boundaries sometimes established by small mammals to protect all or part of their home range.

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An Ecological Life History Of Budsage In Western Utah, Benjamin W. Wood Aug 1966

An Ecological Life History Of Budsage In Western Utah, Benjamin W. Wood

Theses and Dissertations

The ecological life history of budsage (Artemisia spinescens D.C. Eaton) was investigated during 1963 and 1964. The field studies were conducted at the Desert Experimental Range in Millard County, Utah. Laboratory studies were done at Brigham Young University. The different community types in which budsage grows were described and the physical site factors, viz. climate, soil texture, total soluble salts, hydrogen ion concentration of the soil, carbonate content and soil moisture were investigated. Phenology of seedlings, root systems, shoot and flower development, and plant longevity were investigated. Studies were also made on the effects of different seasons and intensities of …

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Salix In Utah, Alv Dan Youngberg Aug 1966

Salix In Utah, Alv Dan Youngberg

Theses and Dissertations

This thesis is a study of the native and naturalized species of Salix in Utah, and is based upon the following methods. A review of all available literature was accomplished in order to compile a list of species. Type specimens were obtained from the University of California at Berkeley, the Smithsonian Institution, and the Gray Herbarium of Harvard University, University of Utah, and Utah State University. About five-hundred specimens were collected in twenty counties during the fall fo 1965 and the spring of 1966. The identification of the willows in this study was based upon type specimens, annotations by Carleton …

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Front Matter, Vol. 7 No. 4 Aug 1966

Front Matter, Vol. 7 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Ants Of The Nevada Test Site, Arthur Charles Cole Jr. Jun 1966

Ants Of The Nevada Test Site, Arthur Charles Cole Jr.

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Front Matter, Vol. 7 No. 2 Jun 1966

Front Matter, Vol. 7 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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End Matter, Vol. 7 No. 2 Jun 1966

End Matter, Vol. 7 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Front Matter, Vol. 7 No. 3 Jun 1966

Front Matter, Vol. 7 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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End Matter, Vol. 7 No. 3 Jun 1966

End Matter, Vol. 7 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Siphonaptera (Fleas) Of The Nevada Test Site, D Elden Beck, Dorald M. Allred Jun 1966

Siphonaptera (Fleas) Of The Nevada Test Site, D Elden Beck, Dorald M. Allred

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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The Weberian Osteology Of Three Utah Suckers (Catostomidae), William James Stubbs May 1966

The Weberian Osteology Of Three Utah Suckers (Catostomidae), William James Stubbs

Theses and Dissertations

The Weberian mechanisms of three Utah Lake suckers (Catostomidae: Catostominae; Catostomini), Catostomus fecundus Cope and Yarrow, Chasmistes liorus Jordan, and Catostomus ardens Jordan and Gilbert, were examined, described, and compared, and a statistical analysis was made of some of their more important differences. The mechanisms were found to be basically similar to one another and to those of other Catostomini as previously described and/or illustrated. They are individually distinct, but each varies within its own limits, the intraspecific variation being greatest in the wider-ranging Catostomus ardens and least in the seemingly most restricted Catostomus fecundus. From the evidence at hand …

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Dermacentor Andersoni And Rocky Mountain Spotted Fever In National Forest Recreational Sites Of Utah, C. Selby Herrin Apr 1966

Dermacentor Andersoni And Rocky Mountain Spotted Fever In National Forest Recreational Sites Of Utah, C. Selby Herrin

Theses and Dissertations

The objectives of this study were to determine (1) the prevalence of adult ticks of Dermacentor andersoni in national forest recreational sites of Utah, and (2) the incidence of spotted fever rickettsia, Rickettsia rickettsii, in the ticks of these areas. With the use of a white flannel cloth, 358 adult D. andersoni (135 males and 223 females) were collected from 48 recreational sites during the spring and summer of 1964. Ticks from each collection were put in pools, preserved in non-fat skim milk at -30° C, and subsequently tested for the presence of spotted fever rickettsia by guinea pig inoculations. …

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Meadow, Millard County, Utah: The Geography Of A Small Mormon Agricultural Community, Richard H. Jackson Jan 1966

Meadow, Millard County, Utah: The Geography Of A Small Mormon Agricultural Community, Richard H. Jackson

Theses and Dissertations

The agricultural village was the basis of the original economy of Utah established by the Mormon settlers, but it has since been supplanted in importance by the industrial and commercial activities of the large centers of the Wasatch Front counties of Salt Lake, Weber, and Utah. This study was conducted in an attempt to determine the future of those communities removed from industrialized northern Utah. The village of Meadow, Millard County, was chosen as an example and it was subjected to a detailed geographic analysis. From this analysis conclusions have been drawn regarding its future.

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Summer Soil And Air Temperatures In Four Plant Communities, Paul W. Conrad Sep 1965

Summer Soil And Air Temperatures In Four Plant Communities, Paul W. Conrad

Theses and Dissertations

Temperature, one of the most influential factors controlling the growth and distribution of plants, was measured during a three month summer period within several stands of vegetation. The stands represented four distinct plant communities: sagebrush-grass, mountain brush, aspen, and conifer. Measurements were obtained by a sucrose inversion method which gave exponential average or effective mean temperature (eT) values. Registerants, small glass vials filled with a sucrose-buffer solution, were placed in the air 10 decimeters above the ground level and in the soil 1, 5, and 10 decimeters below the ground level. The sites were carefully described with respect to plant …

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Mammal Populations And Their Effects On Red Elderberry In The Mud Creek Sheep Allotment, Stawberry Valley, Utah, Howard Duane Smith Aug 1965

Mammal Populations And Their Effects On Red Elderberry In The Mud Creek Sheep Allotment, Stawberry Valley, Utah, Howard Duane Smith

Theses and Dissertations

The purpose of this study has been to determine : (1) the mammalian species present in the Mud Creek area; (2) the approximate population density of each trappable species; (3) the species responsible for the damage; (4) the stem density and frequency of Smbucus racemosa; and (5) the approximate extent of damage to the red elderberry stems.

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A Phytosociological Study Of Coprophilous Ascomycete And Basidiomycete Communities From Santaquin Canyon, Utah, A. Clyde Blauer Aug 1965

A Phytosociological Study Of Coprophilous Ascomycete And Basidiomycete Communities From Santaquin Canyon, Utah, A. Clyde Blauer

Theses and Dissertations

Numerous reports have been published on the taxonomy and distribution of the coprophilous Ascomycetes and Basidiomycetes. No known quantitative work has been done, however, on the succession and structure of the communities formed by these higher fungi. This research was undertaken to study those two phases of the ascomycete and basidiomycete communities which grow and fruit on cow dung collected from Santaquin Canyon, Utah.

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Revision Of Gilia (Polemoniaceae) Section Gilmania, M. Eileen Matthews Aug 1965

Revision Of Gilia (Polemoniaceae) Section Gilmania, M. Eileen Matthews

Theses and Dissertations

The results of this study show that section Gilmania (genus Gilia) consists of only two species G. latifolia and G. ripleyi, which are well separated from the rest of the members of genus Gilia by their simple, aristately toothed, obovate to orbicular leaf blades, many, small, brilliant rose, salverform corollas, basally inserted, stout-filamented stamens, and 30 to 100 small, reddish-brown, oval seeds per locule.

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The Role Of Thiamine Pyrophosphate In Regulating The Level Of Gamma-Aminobutyric Acid In The Central Nervous System, Bryant L. Adams Aug 1965

The Role Of Thiamine Pyrophosphate In Regulating The Level Of Gamma-Aminobutyric Acid In The Central Nervous System, Bryant L. Adams

Theses and Dissertations

The level of gamma-aminobutyric acid in the brains of white rats suffering from thiamine deficiency symptoms resulting from pyrithiamine or oxythiamine antagonism of thiamine or from thiamine deprivation was measured. The level of this amino acid was 17.5% lower in the brains of pyrithiamine-treated rats and 20.0% lower in the brains of thiamine-deprived rats than in the control rats. Daily injections of ten times the required amounts of vitamin B6 in rats treated with pyrithiamine or oxythiamine or by thiamine deprivation had no effect on the level of brain gamma-aminobutyric acid or on the psiological behavior of these rats. The …

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Studies Of Rat Brain Thiamine Pyrophosphokinase, Lavell Rolfson Johnson Aug 1965

Studies Of Rat Brain Thiamine Pyrophosphokinase, Lavell Rolfson Johnson

Theses and Dissertations

The enzyme ATP:thiamine pyrophosphotransferase (thiamine pyrophosphokinaseJ was purified from acetone powders which were prepared from rat brains up to the chromatography on alumina C_γ step by a modified procedure that Mano (Y. Mano, J. Biochem., 42, 283 (1960)] developed for the purification of the rat liver thiamine pyrophosphokinase. The enzyme was purified 12 fold over that in the original extract of the acetone powder. A spectrophotometric assay for the brain thiamine pyrophosphokinase was developed utilizing brewer's yeast apotransketolase. The transketolase assay was able to detect less than 10^-11 moles of thiamine diphosphate, which was synthesized by the kinase, in the …

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A Microscopic Study Of An Early Pennsylvanian Flora From The Manning Canyon Shale, Utah, Max W. Blaylock Aug 1965

A Microscopic Study Of An Early Pennsylvanian Flora From The Manning Canyon Shale, Utah, Max W. Blaylock

Theses and Dissertations

The Manning Canyon Shale on the eastern slope of Lake Mountain in Utah County, Utah contains an Early Pennsylvanian flora within its upper shales. Many of these fossils appear to be new species. A microscopic study of the tissue remains can be of value in the further classification of these fossils. Selected fossils were macerated in hydrofluoric acid, and the residues were examined microscopically for tissue remains. Objects identified as fossil tissue remains were found in twenty five of the forty-eight specimens examined. Fibers, fiber tracheids, tracheids, and spores were isolated from fossils identified as Calamites. The spores were possibly …

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Identification Of The Adults, Nymphs, And Larvae Of Ticks Of The Genus Dermacentor Koch (Ixodidae) In The Western United States, Elias P. Brinton Jul 1965

Identification Of The Adults, Nymphs, And Larvae Of Ticks Of The Genus Dermacentor Koch (Ixodidae) In The Western United States, Elias P. Brinton

Theses and Dissertations

In 1910 C. W. Stiles made the following comment as a part of a summary statement to his extensive study of the stigmatal plates of Dermaeentor ticks: "The specific determination of ticks is attended in many cases with con-siderable difficulty."

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Front Matter, Vol. 7 No. 1 May 1965

Front Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner May 1965

A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

This paper constitutes a terminal report to the United States Atomic Energy Commission for contract AT(11-1)819. It provides not only a faunistic and floristic study of areas having a high and low surface radiation, but also includes a consideration of their general ecology. Major emphasis is placed on the variation of the external characteristics of the small vertebrates of these areas with a statistical analysis of those characters examined in the lizards. The study was conducted in southeastern Utah (Tanner 1963, see map) from October 1959 through 1964, and was conducted as a test of the variation effects of natural …

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End Matter, Vol. 7 No. 1 May 1965

End Matter, Vol. 7 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Tularemia And Deer Flies In The Environs Of Utah Lake, Utah, Kaye B. Cox May 1965

Tularemia And Deer Flies In The Environs Of Utah Lake, Utah, Kaye B. Cox

Theses and Dissertations

Deer flies have been implicated as mechanical veotors of tularemia in Utah. Although infected flies heretofore have not been tound in nature, there is little doubt of their importance in transmitting tularemia to man. Two species present in this area, Chrysops discalis Williston and Chrysops noctifer Osten Sacken, have been shown experimentally to transmit the disease. The presence of deer flies in the environs of Utah Lake where tularemia is endemic oftera a potential health threat to man, and the expanding human population and development ot recreational facilities adjacent to the lake inorease this potential. Despite the taot that deer …

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Front Matter, Vol. 6 No. 4 Mar 1965

Front Matter, Vol. 6 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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