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Effect Of Exercise On Tissue Concentrations Of Thyroid Hormones And On Thyroxine Degradation Rate In The Rat, William W. Winder Aug 1971

Effect Of Exercise On Tissue Concentrations Of Thyroid Hormones And On Thyroxine Degradation Rate In The Rat, William W. Winder

Theses and Dissertations

Several methods were used to detect changes in thyroid activity and in degradation of thyroxine (T4) in exercising and sedentary control rats. Rats were run in a motor-driven exercise wheel over a three-week period at progressively increasing work loads and then were run 1.5-2 hours per day for 10-14 days before sacrifice. Disappearance of injected T4-125I from plasma was considerably enhanced by exercise. As determined by isotopic equilibration and paper chromatographic methods, T4 concentration was depressed in plasma and elevated in liver of exercised rats. No significant changes in T4 concentration were observed in heart, kidney, or gastrocnemius muscle. Thyroidal …

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A Comparative Morphological Study Of Bryobia Rubrioculus (Scheuten) (Acarina: Tetranychidae), Robert Lee Frommer Aug 1971

A Comparative Morphological Study Of Bryobia Rubrioculus (Scheuten) (Acarina: Tetranychidae), Robert Lee Frommer

Theses and Dissertations

A comparative morphological study of Bryobia rubrioculus {Scheuten} from 24 worldwide sites was made to determine if enough significant variation existed to designate the mites from each locale as an isolated population. Forty-seven characters were then selected and measured for each mite and analyzed with Ward's error sum cluster analysis procedures. These analyses led to the conclusion that: {1} B. rubrioculus tends to form distinct populations within each respective locale, and mites from locales that did not form clusters are possibly a result of automictic parthenogenesis and introductions from other areas; {2} B. rubrioculus is distinctly separate from Bryobia praetiosa …

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A Pectin Histochemical Study Of The Host Pathogen Relationship Between Pyrenochaeta Terrestris And Allium Cepa, Leroy Richard Cobia Aug 1971

A Pectin Histochemical Study Of The Host Pathogen Relationship Between Pyrenochaeta Terrestris And Allium Cepa, Leroy Richard Cobia

Theses and Dissertations

The involvement of pectin and pectinases in the host pathogen interaction of P. terrestris and Allium cepa were investigated by use of pectin histochemical stains at the electron microscope level. Several different pectin histochemical stains were used, but only two (the hydroxylamine reaction, and the pectin stain developed in this study) gave reliable results. It was observed that by the time the fungus has reached the host cell wall pectinesterase and endoplygalacturonase have fully removed the pectin from the host cell wall. When this has occurred, cellulases are released which continue to degrade the host cell wall. Electron transparent areas …

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Studies Of Pig Brain Thiamin Pyrophosphokinase, James Weldon Peterson Aug 1971

Studies Of Pig Brain Thiamin Pyrophosphokinase, James Weldon Peterson

Theses and Dissertations

Pig brain thiamin pyrophosphokinase (TPK) (ATP: thiamin pyrophosphotransferase, EC 2.7.6.2) was purified 260-fold over extracts of brain acetone powder. The purification was followed using a direct, radiometric assay. As determined in an analytical ultracentrifuge and by disc-gel electrophoresis, the most highly purified enzyme preparations were not homogeneous. The purified enzyme has a broad pH optimum extending from 8.3 to 9.3 in phosphate-glycylglycine buffer. It has an isoelectric point at about pH 4.2. For optimal enzymatic activity, the ratio of magnesium to ATP must be 0.6. Any deviation from this ratio causes a rapid drop in enzymatic activity. A study of …

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Prey Utilization By Nesting Golden Eagles In (Aquila Chrysaertos) In Central Utah, William Bruce Arnell Aug 1971

Prey Utilization By Nesting Golden Eagles In (Aquila Chrysaertos) In Central Utah, William Bruce Arnell

Theses and Dissertations

During the spring of 1969 and 1970, 28 Golden Eagle eyries in four locales in central Utah were observed to determine the prey utilized during the nesting season. Visits were made every two weeks to the eyries. Prey were removed from the nests upon counting to avoid recounting at the next visit. Sixteen species of vertebrates were found as prey for nesting Golden Eagles. Mammals comprised 96 per cent of the prey, and lagomorphs alone accounted for 92 per cent. The blacktail jackrabbit occurred as 77.8 per cent of all prey items. Avian species constituted 3.9 per cent of prey …

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The Biochemical Response Of Provo Bay To Nutrient Inflow, R. Bruce Sundrud Aug 1971

The Biochemical Response Of Provo Bay To Nutrient Inflow, R. Bruce Sundrud

Theses and Dissertations

Provo Bay of Utah Lake, Utah, receives the effluents from farms, industry, and three cities. In order to determine the effects of these effluents, eleven stations were established throughout the Bay. At weekly intervals from June 19 to October 26, 1970, and monthly thereafter until March, 1971, the water at these stations was sampled for dissolved oxygen (DO}, carbon dioxide (CO2), turbidity, pH, phosphates, nitrates, biochemical oxygen demand (BOD) and coliform bacteria. Due to intense algal blooms, the quality of the water changes as it passes through Provo Bay. Average values for the inflow, mid-Bay, and point of discharge respectively …

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A Study Of Seed Germination And Establishment Of Seedlings Of Lodgepole Pine In Different Soil Types Under Certain Bog Conditions, Yun-Fan Yuan Aug 1971

A Study Of Seed Germination And Establishment Of Seedlings Of Lodgepole Pine In Different Soil Types Under Certain Bog Conditions, Yun-Fan Yuan

Theses and Dissertations

Soil texture, organic matter content, and hydrogen-ion concentration of soil samples were determined to find the correlation between soil characteristics, seed germination and seedling establishment of Pinus contorta. Scarification and stratification were treatments used for determining germination requirements of dormant seeds. Seeds were planted in different soils and experiments were conducted to determine the effects of different light intensities, temperatures, and depths of the water table on apparent photosynthesis rate and seedling establishment. Soil samples, pine cones, and young trees needed for the experiments were collected near Lily Lake, in the Uintah Mountains. The greatest and the fastest germination was …

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Environmental Factors That Influence The Timing Of A Cyclic En Masse Foraging Migration Of Ligia Occidentalis Dana (Crustacea: Isopoda) On The Northern Gulf Of California, J. Wanless Southwick Aug 1971

Environmental Factors That Influence The Timing Of A Cyclic En Masse Foraging Migration Of Ligia Occidentalis Dana (Crustacea: Isopoda) On The Northern Gulf Of California, J. Wanless Southwick

Theses and Dissertations

En masse foraging migrations of Ligia occidentalis Dana were conspicuous events on rocky beaches near Puerto Peñasco, Sonora, Mexico. Experiments were conducted to determine which factors of the environment contained the regulating rhythm for the migration, if indeed the event were cyclic. Experiments were conducted in the laboratory using a tide-simulation aquarium and in the field using mark and release techniques. A time-lapse photography system was used in the field to quantify isopod activity for comparison with environmental factors. A regular cycle for the foraging migration was found. It was in tune with both insolation and tidal cycles so that …

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Effects Of Ionizing Radiations On Mite Populations At The Nevada Test Site, Richard Riddle Walker Aug 1971

Effects Of Ionizing Radiations On Mite Populations At The Nevada Test Site, Richard Riddle Walker

Theses and Dissertations

Population and community studies dealing with radiation stress have essentially neglected the mites. When references have been made to the responses of mite populations to ionizing radiation, the form of radiation has almost always been gamma. This study reports results of naturally occurring populations of desert mites, at the Nevada Test Site, to ionizing radiation--largely beta. Eighteen species groups were identified from Berlese samples and tested for stress responses with species diversity indices and analyses of variations in predator-prey ratios. General agreement with previous studies showed a decreasing pattern in these two tests within the controls. This was interpreted as …

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Post-Mortem Examination Of Cattle And Sheep For Parasitic Helminths, Phil Duke Wright Aug 1971

Post-Mortem Examination Of Cattle And Sheep For Parasitic Helminths, Phil Duke Wright

Theses and Dissertations

A survey of helminth parasites of sheep and cattle was conducted to determine the incidence and distribution of these parasites that could be detected by post-mortem examination. Animals were obtained from local abattoirs within the valley, and the viscera were examined for the presence of helminth parasites. Parasites identifies from sheep in order of highest incidence were: Haemonchus contorus, Ostertagia cicumcinta, Chabertia ovina, Nematodirus spathiger, Trichostongylus colubriformis, Thysanosoma actinioides, Trichuris ovis, N. filicollis, Echinococcus granulosus, Strongyloides papillosus, O. ostertagi, Cooperia oncophora, Cysticercus tenuicollis, Fasciola hepatica, Oesophagostomum venulosum, Moniezia expansa, and M. benedieni. Those recovered from cattle in order of highest …

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Ultrastructural And Histochemical Investigations Of Ipomoea Batatus Lam. Infected By Rhizopus Stolonifer (Fr.) Lind, Kendall O. Smith Aug 1971

Ultrastructural And Histochemical Investigations Of Ipomoea Batatus Lam. Infected By Rhizopus Stolonifer (Fr.) Lind, Kendall O. Smith

Theses and Dissertations

The ultrastructural aspects of Rhizopus stolonifer (Fr.) Lind. Infection in Ipomoea batatus Lam. Roots and the histochemistry of cell walls affected by enzymes secreted by the fungus were investigated. Specimens were prepared for viewing in the electron microscope by thin-sectioning techniques. Degradation of cellular membreanes and host tissues in advance of the fungus was evident. Breakdown of the middle lamella was detected by special histochemical stains for pectin. Breakdown occurred in the following was: (1) maceration of the middle lamella before maceration of the cell wall, (2) simultaneous degradation of both the middle lamella and the cell wall, (3) maceration …

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No. 034 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Weiying Wan Jul 1971

No. 034 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Weiying Wan

Journal of East Asian Libraries

No abstract provided.

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Botanical And Physiographic Reconnaissance Of Northern Yukon, Stanley L. Welsh, J. Keith Rigby Jul 1971

Botanical And Physiographic Reconnaissance Of Northern Yukon, Stanley L. Welsh, J. Keith Rigby

Brigham Young University Science Bulletin, Biological Series

The area of study is located in the northern panhandle of the Yukon Territory, and includes the British and Barn Mountains, Old Crow Flats, and the coastal plain of the north slope. The physiography and geology of the region is described and the plant communities are enumerated. An annotated list of 279 species, 15 subspecies, 63 varieties, and 1 form of vascular plants collected during the summer of 1970 is included.

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End Matter, Vol. 14 No. 2 Jul 1971

End Matter, Vol. 14 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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Christ And The Twelve Apostles, Dallas Anderson Jul 1971

Christ And The Twelve Apostles, Dallas Anderson

BYU Studies

No abstract provided.

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Academic Responsibility, Robert K. Thomas Jul 1971

Academic Responsibility, Robert K. Thomas

BYU Studies

No abstract provided.

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End Matter, Byu Studies Jul 1971

End Matter, Byu Studies

BYU Studies

No abstract provided.

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The Banishment Of The Mormon People, Josiah E. Hickman Jul 1971

The Banishment Of The Mormon People, Josiah E. Hickman

BYU Studies

No abstract provided.

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Introductory Pages, Byu Studies Jul 1971

Introductory Pages, Byu Studies

BYU Studies

No abstract provided.

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The 1968 Presidential Decline Of George Romney: Mormonism Or Politics?, Dennis L. Lythgoe Jul 1971

The 1968 Presidential Decline Of George Romney: Mormonism Or Politics?, Dennis L. Lythgoe

BYU Studies

No abstract provided.

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A Letter From Brigham Young And Daniel H. Wells, 1857, James B. Allen, Brigham Young, Daniel H. Wells Jul 1971

A Letter From Brigham Young And Daniel H. Wells, 1857, James B. Allen, Brigham Young, Daniel H. Wells

BYU Studies

No abstract provided.

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The Mormons And The Donner Party, Eugene E. Campbell Jul 1971

The Mormons And The Donner Party, Eugene E. Campbell

BYU Studies

No abstract provided.

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The Bernhisel Manuscript Copy Of Joseph Smith's Inspired Version Of The Bible, Robert J. Matthews Jul 1971

The Bernhisel Manuscript Copy Of Joseph Smith's Inspired Version Of The Bible, Robert J. Matthews

BYU Studies

No abstract provided.

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Two Iowa Postmasters View Nauvoo: Anti-Mormon Letters To The Governor Of Missouri, Warren A. Jennings Jul 1971

Two Iowa Postmasters View Nauvoo: Anti-Mormon Letters To The Governor Of Missouri, Warren A. Jennings

BYU Studies

No abstract provided.

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Emerson's Relevance Today, Ray S. Williams Jul 1971

Emerson's Relevance Today, Ray S. Williams

BYU Studies

No abstract provided.

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Full Issue, Byu Studies Jul 1971

Full Issue, Byu Studies

BYU Studies

No abstract provided.

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Front Matter, Vol. 14 No. 2 Jul 1971

Front Matter, Vol. 14 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

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High-Pressure Equation Of State For Nacl, Kcl, And Cscl, Daniel L. Decker Jul 1971

High-Pressure Equation Of State For Nacl, Kcl, And Cscl, Daniel L. Decker

Faculty Publications

A calculation of the equation of state for NaCl from a Mie-Grüneisen equation was repeated using more accurate values of the zero-pressure compressibility. It was also extended to KCl and CsCl. An analysis of this approach to pressure calibration indicates that it will yield pressures with about the same accuracy as can be presently achieved by experimental measurements above 25 kbar, and thus furnishes a temporary practical pressure scale.

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Cannibalism In Captive Rattlesnakes, Robert E. Bullock Jun 1971

Cannibalism In Captive Rattlesnakes, Robert E. Bullock

Great Basin Naturalist

No abstract provided.

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Conifers Of The Bear Lake Area And Mountains South Of The Great Salt Lake, Ronald M. Lanner Jun 1971

Conifers Of The Bear Lake Area And Mountains South Of The Great Salt Lake, Ronald M. Lanner

Great Basin Naturalist

No abstract provided.

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