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Phospholipid Inhibitor Inactivation As A Mechanism For The Activation Of Renin By Cadmium Ions, Thomas Emanuel Gallant

Senior Scholar Papers

Incubation of bovine kidney homogenates with CdCl or ZnCl2 doubles their renin activity as measured by rat bioassay. It is suggested that the activation of renin by these divalent cations results from their interference with the renin inhibitor system described by Sen et al., (1968). Failure of the inhibitor to reassociate with renin upon removal of cadmium ions by EDTA supports their renin control model. It is suggested that either renin samples prepared directly from tissue without the use of acetone powder preparations contain little phospholipase A or cadmium inactivates phospholipase A. In the absence of active phospholipase A, conversion …

A Monographic Study Of The Genus Aristida In New Mexico, Raymond C. Krehoff

Biology ETDs

Studies of collections of Aristida from New Mexico indicate that 16 species of this genus occur in the state. These are A. adscensionis L., A. oligantha Michx., A. orcuttiana Vasey, A. ternipes Cav., A. barbata Fourn., A. divaricata Humb. and Bonpl., A. hamulosa Henr., A. glauca (Nees) Walp., A. purpurea Nutt., A. roemeriana Scheele, A. wrightii Nash, A. pansa Woot. and Standl., A. longiseta Steud. (and 2 varieties), A. fendleriana Steud., A. parishii Hitchc., and A. arizonica Vasey. These taxa are treated systematically from a morphological point of view and probable relationships among them are discussed. Distribution of each of …

Life History Studies As Related To Weed Control In The Northeast; 6: Large And Small Crabgrass, R.A. Peters, Stuart Dunn

Storrs Agricultural Experiment Station

No abstract provided.

The Ias Bulletin, V5n3, May 1971, Iowa Academy Of Science

IAS Bulletin

In this issue:

--- Officers, Directors, and Section Chairmen, 1971-72
--- Election Results
--- Attendance at 83rd Session
--- Membership at all Time High
--- Section Interests Among Academy Members
--- Visiting Scientist Program Dead
--- Iowa Science Teachers Journal to be Distributed Only as Requested
--- Social Implications Committee Selects Single Concern for its Attention
--- Important Recommendations from the Academy's Committee on Governmental Cooperation and Assistance
--- Academy Farm Operating Under New Policies
--- Student Programs to be Evaluated
--- Recognition and Awards
--- Explanation of Election Ballot with Signature Space
--- Two Junior Academy Members to Represent …

Phytoplankton Periodicity In Shanty Hollow Lake, Warren County, Kentucky, David Hill

Masters Theses & Specialist Projects

A study of the phytoplankton periodicity and its correlation with chemicophysical parameters, diel variation of the plankton, and the cyclomorphotic variation of Ceratium hirundinella was made in Shanty Hollow Lake, Warren County, Kentucky, from October, 1969, to August, 1970.

Phytoplankton samples were collected at zero and six feet with a Kemmerer sampler (31 October through 8 December) and with a ten -liter Birge-Juday plankton trap (23 December through 9 August). Water samples for the chemicophysical determinations were collected with a Kemmerer sampler. The phytoplankton samples were preserved with 5% formalin until they were enumerated. The chemicophysical determinations (pH, conductivity, dissolved …

The Determination Of The Time Of Ovulation, First Cleavage, Subsequent Cleavage Divisions And Implantation In Female Mice Treated With Gonadotrophins, James William Weldon

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 in Biology by James William Weldon in May of 1971.

Systematic And Evolutionary Implications Of Parthenogenesis In The Hymenoptera, C. N. Slobodchikoff, Howell V. Daly

Entomology Collection

Two types of parthenogenesis, arrhenotoky and thelytoky, exist in the Hymenoptera. Arrhenotoky, the development of males from unfertilized eggs, is present in all wasps and bees. Thelytoky, the development of diploid females from unfertilized eggs, is present in a few species. Two types of thelytoky, apomixis and automixis, are known. Most thelytokous Hymenoptera are automictic. No meiosis, only mitosis, occurs in apomixis. Meiosis does occur in automixis, allowing crossing-over and segregation of genes. Advantages of thelytoky are that heterotic combinations become fixed, gene loss is reduced, and reproduction requires only a single individual. One advantage of arrhenotoky is that genetic …

Preparation Of Biologically Active Ribosomal Subunits From Fungal Spores, James L. Van Etten

Department of Plant Pathology: Faculty Publications

Ribosomal subunits were prepared from fungal spore ribosomes and reassociated to yield biologically active ribosomes.

A Revision Of The Feather Mite Genus Brephosceles (Proctophyllodidae: Alloptinae), Paul C. Peterson

Bulletin of the University of Nebraska State Museum (1924–2023)

A systematic revision is presented for the genus Brephosceles. Data on external morphology, zoogeography, and host-parasite relationships are included. Thirteen named and thirty new species are recognized and described. The new species and the type hosts are: Brephosceles afribycis, from Afribyx lateralis (Charadriidae); B. anhimae, from Anhima cornuta (Anhimidae); B. belonopteri, from Belonopterus chilensis cayennensis (Charadriidae); B. bilobatus, from Puffinus puffinus (Procellariidae); B. chilensis, from Belonopterus chilensis lampronotus (Charadriidae); B. collaracus, from Charadrius collaris (Charadriidae); B. constrictus, from Charadrius bicinctus (Charadriidae); B. diomedei, from Diomedea chrysostoma (Diomedeidae); B. discidicus, from Cygnus bewickii (Anatidae); B. disjunctus, from Pterodroma leucoptera hypoleuca (Procellariidae); …

A Study Of The Biology Of The Species Of Protocalliphora In The Northern Wasatch Range, Terry L. Whitworth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A total of 733 bird nests, representing 55 species from 23 habitats, was examined. Forty-nine percent of the nests of 39 bird species were infested with 16 species of Protocalliphora.

Infestation of bird nests by Protocalliphora is believed to be related to a number of factors, which are discussed. Loosely constructed nests, nests heavily saturated with feces, and nests occupied early in the season had low rates of infestation. Nests of colonial birds were more frequently infested than those of solitary birds. Nests of some birds were rarely or never infested.

Sixteen species of Protocalliphora are differentiated and their …

Spawning And Early Life History Of Largemouth Bass (Micropterus Salmoides) In Wahweap Bay, Lake Powell, Kent D. Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spawning time and habitat of largemouth bass, survival of embryos, and growth and food habits of fingerlings were studied in 1968 and 1969 at Wahweap Bay, Lake Powell. Spawning began in mid- to late-April, when mean daily water temperature at nesting depths was 14.4-15.0 Centigrade (58-59 Fahreheit), and continued until mid-June. Most spawning took place on the northeast shore of the bay. Sandstone rubble was the most commonly used bottom type for nesting, either at the base of ledges or around large sandstone boulders. Mean nest depth increased from 1.63 meter to 4.54 meters (5.36 feet to 14.90 feet) in …

Effects Of Dmso And Propham On Mitosis In Root Tips Of Secale Cereale, Max Rosequist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

DMSO (dimethyl sulfoxide) and propham (isopropyl carbanilate) were investigated to determine their effect singly and in combination on mitoses in rye (Secale cereale) root tip cells. Root tips were prepared for observation by the paraffin and aceto-carmine squash methods. Results showed DMSO caused the following abnormalities: arrested metaphases, multipolar spindles, multinucleate cells, stickiness, shortened chromosomes, and mitotic inhibition. Cells from propham treated root tips exhibited the same abnormalities as those treated with DMSO. In addition, propham treatments resulted in polyploid cells and chromosome granulation. In combination, DMSO and propham caused all the abnormalities mentioned above except polyploidy. In …

Ribose 5'-Phosphate Aminotransferase Of Salmonella Typhimurium, Gulamnabi Y. Vahora

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ribose-5 '-phosphate aminotransferase, an alternate first enzyme in the purine de novo pathway, has been purified about 800-fold from Salmonella typhimurium (pur D-55 ). The enzyme is distinct from ribosylpyrophosphate-5'-phosphate amidotransferase (E C 2.4.2.14), has an approximate molecular weight of 229,000, and requires ribose-5'-phosphate, ATP and either ammonium ion, carbamyl phosphate or L-glutamine, to synthesize 5'-phosphoribosylamine (PRA). A coupled assay system, employing a S. typhimurium (pur G-310) extract as the coupling-agent source, was used to measure the enzyme. PRA production in this system was inhibited by higher ribose-5' -phosphate concentrations and longer (over 10 minutes) incubation periods. It …

Preliminary Estimates Of Bark Percentages And Chemical Elements In Complete Trees Of Eight Species In Maine, Harold E. Young

Aspen Bibliography

Five tables were prepared to show the relative amount of bark on each of the tree components, the concentration and range of 12 chemical elements in the bark of each tree component, the proportion of each of the chemical elements in the bark of that element in the complete tree, and the proportion of each element in the bark as compared to the wood and bark of the merchantable bole. There is an overall 4:6:1 wood to bark ratio, but due to the higher concentration of the elements in the bark, the proportion of the elements in the bark is …

Estimating Agricultural Production Functions From Experimental Data For Different Crops In Relation To Irrigation, Fertilization And Soil Management In Northern Utah, Subramaniuam Swami Nathan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Estimates of agricultural production functions from experimental data for four different crops in relation to six variable inputs are calculated by this study. There are four basic sections in the study. The first section covers the review of production function concepts and the procedures and problems that specifically pertain to this study. Also the importance of joint economic-agronomic research efforts, methodologies and applications of agricultural production functions are cited.

The second section includes the presentation data and postulated functional relationships in estimating production functions. Model building programs are used in developing three dimensional figures, which aid in the selection of …

The Effects Of Available Water Upon Populations Of Chukar Partridge On Desert Mountains Of Utah, William W. Shaw

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of surface water to chukar partridges (Alectoris graeca) and the feasibility of rain-catchment devices for improving chukar habitat were studied on the Thomas and Dugway Mountain Ranges in western Utah during 1969 and 1970.

Sources of surface water were removed from one mountain range, and chukar populations on that range were compared with populations on an adjacent range with permanent sources of water.

Providing drinking water did not improve chukar productivity, survival, or availability to hunters. Although most birds concentrated around water supplies in the summer, some chukars appeared to live completely independent of any permanent …

Sub-Aversive Response Contingent Foot Shock As A Positive Reinforcer, Robert Lea Fulwiler

All Master's Theses

Forty-eight rats were divided into 8 groups; four were maintained under normal conditions and the other four under sensory deprivation and tested at o, 3, 6, and 9 days after condition institution. The response was placing the head through a hole in the operant chamber and the stimulus (0, 1.2, 4, or 12 Vac) was contingent upon the response. Analysis ot variance disclosed significant differences (p<.01) between the deprived and the non-deprived groups at days 6 and 9; and a significant interaction between deprivation condition and time of test. No differences were shown between the stimulus intensities indicating that the stimulus did not have a reinforcing effect.

The Response Of Gingival Tissues To Alterations In Ph, Robert C. Jann

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to evaluate the histopathological and clinical changes that occurred when a continuous supply of exogenous acid or base, at varying pH, was delivered adjacent to the gingival crest of the monkey. A related goal was to develop a monkey model system which would deliver test solutions continuously and atraumatically, to the experimental gingival sites.

Two young adult female monkeys had a perfusion apparatus attached to certain maxillary teeth so that test solutions were deposited atraumatically to the marginal gingival tissues. During the experimental periods the animals were kept in primate restraining chairs and fed …

The Altitudinal Distribution Of Mammals Of The La Sal Mountains, Utah, Stephen Robert Bradley

Theses and Dissertations

This study deals with the distribution of the mammals of the La Sal Mountains, Grand and San Juan Counties, Utah. The distribution of the mammals has been correlated with the distribution of the vegetation zones of the mountains which varies with the elevation. The study points out which of the various mammals are found in the various vegetational communities and how the distribution varies from community to community.

The Hyobranchium And Throat Myology Of The Ambystomidae Of The United States, John E. Krogh

Theses and Dissertations

The 16 species and subspecies of the Ambystomidae of the United States are placed into six groups according to their throat morphology as follows: The Dicamptodon group, the Rhyacotriton group, the A. annulatum-A. cingulatum group, the A. gracile-A. jeffersonianum-A. mabeei-A. macrodactylum-A. maculatum group, the A. talpoideum group, the A. opacum-A. texanum group, and the A. rosaceum-A. t. tigrinum-A. t. melanostictum-A. t. nebulosum group. Dicamptodon appears to be the most primitive group and Rhyacotriton the most specialized. Based on the morphology of the throat region it is suggested that A. rosaceum be placed in the tiger salamander group as a subspecies …

Bacterial Receptor Sites For Uptake Of Transforming Dna, Douglas Pierre Bingham

Theses and Dissertations

Bacterial transformation is defined as a mechanism of genetic exchange whereby a population of bacteria can obtain genetic informa-tion as a result of cellular uptake and integration of extracellular deoxyribonucleic acid released from other bacteria by natural or in-duced lysis. In order for a transformable strain of bacteria to take up DNA and to undergo transformation, the cells must be in a physiolog-ical state called competence. A cell is referred to as competent if it has the ability to bind extracellular DNA irreversibly and subsequently to integrate and express the DNA.

Protein Needs Throughout The Life Cycle, Mei-You Tsai

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

In most countries in Africa and in South and East Asia the foods which are produced do not provide adequate diets, or in some areas, not enough food for the population. In most areas, it is not the severe shortage of food supplies, but inequality of food distribution and the quality of the diet as influenced by deficiencies of individual nutrients. One of the most severe deficiencies is in protein because of the poor quality and imbalanced diets due to lack of nutritional knowledge and ignorance of the special needs of large groups of people such as pregnant and lactating …

Investigation Of Urolithiasis Occurring In Hatchery-Reared Trout In Utah, Ernest H. Dean Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The urolithiasis condition investigated occurred at a "hard water" hatchery in Utah after the trout were changed from a meat diet to a commercial pelleted fish feed as a sole sustaining diet in 1961. Numerous diet modifications proved unsuccessful in preventing urolithiasis at the hatchery. It was eventually determined that different commercial diets resulted in varied percentages of trout developing urolithiasis. The urolithic deposits found in the kidney tubules were amorphous and composed of calcium phosphate (apatite) and an organic matrix. Bacterial contamination of the kidneys was not an important factor in the formation of urolithiasis. Rainbow trout containing urolithic …

Ecology Of Badgers In Curlew Valley, Utah And Idaho With Emphasis On Movement And Activity Patterns, Frederick G. Lindzey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Between March, 1969 and July, 1970, 16 badgers (Taxidea taxus) were caught and fitted with radio transmitters in the southern part of Curlew Valley. The animals were followed telemetrically; seven animals contributed sufficient data from which home-range, movement and activity patterns could be discerned. The aver age annual home-range size of five females was 664 acres (± s.d. 99 .5 acres). Female home-range sizes were approximately the same within crested wheat-grass (Agropyron aristatum) and sagebrush (Artemisia tridentata) vegetation types, with greater distances traveled each night by females in the crested wheat-grass. Both home-range size and total movement were less …

The Suitability Of Newton Reservoir To Be Either A Coldwater Or A Warmwater Fishery, Jeffrey H. Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Measurements were made of the water chemistry the distribution and relative abundance of net-plankton, and the reproduction, age and growth, and food habits of largemouth bass in Newton Reservoir, Newton, Utah.

Samples for chemical analysis were collected weekly from three sites and from several depths at each site. Plankton collections were made on a monthly basis. Data were compared with data in the literature and analyzed for possible ecological implications.

Physical and chemical investigations of the water indicated favorable conditions for a warmwater fishery.

The study of the surface net-plankton revealed a predominance of blue-green algae.

The substratum of the …

The Effects Of Cs Habituation And Duration Of The Directional Modification Of The Cardiac Response In The Guinea Pig (Cavia Procellus), Ray Charles Larson

All Master's Theses

The present experiment examined the effects of CS habituation and two different levels of CS duration (60 versus 6 sec) on the directional modification of the conditioned cardiac response in the guinea pig. The results indicated that the only reaction to the CS, regardless of prior habituation or CS duration, was a decelerative conditioned HR response. However, habituation to a CS prior to classical aversive conditioning was found to attenuate the magnitude of the bradycardia CR that developed. The bradycardia CR was discussed in terms of being a cardiac component of the orienting response.

The Microclimate, Ion And Water Balance Of Larval And Adult Ascaphus Truei Stejneger, Terry L. Mullen

All Master's Theses

The purpose of this paper is first to describe the microclimate occupied by larval and adult Ascaphus. This microclimate presents certain osmo- and iono- regulatory problems. The second purpose of this paper is to show how Ascaphus meets these osmo- and iono- regulatory problems.

Investigations Into The Microbial Ecology And Limnology Of Hyrum Reservoir, In Northern Utah, Kenneth Maxwell Green

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of preliminary investigations was carried out to determine the factors promoting the dense, late summer waterblooms of Aphanizomenon flos-aguae in Hyrum Reservoir in northern Utah. Attempts were made to culture the Aphanizomenon in the ASM-8a medium of O'Flaherty and Phinney (J. Phycol. 6:95-97. 1970), but no growth was obtained and the algae soon lysed. Cultures were maintained, without growth, for more than four months in a lake water--lake sediment medium at 17 C under 1500 lux flourescent light.

Dissolved oxygen measurements using an in situ probe revealed the development of a sharp oxycline during the summer months; on …

An Evaluation Of A Self-Guided Visitor Tour At Bear River Migratory Bird Refuge, Steven J. Kohler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1967 this study was initiated to evaluate the self-guided visitor tour of Bear River Migratory Bird Refuge. A 20 page visitor information booklet and tour guide was prepared and published for distribution at the refuge, and its effectiveness in telling the refuge story was evaluated. To gain a measure of the self-guided tour in terms of quality, visitor use patterns and satisfactions were critically examined.

To gather data on visitor use of the refuge, the visiting public was directly sampled by three methods: mail questionnaires, on-site interviews and candid tower observations of groups on the tour.

The information and …

Ecological Life History Of Rudbeckia Occidentalis Nutt, Juan Arturo Florez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Phenological studies of coneflower on aspen range in Northern Utah showed that resumption of growth of mature plants begins at the time of snow melt and the initial or rosette stage is completed between mid-May and mid- June. The rate of growth in this stage is controlled by temperature, being greater at higher mean temperatures. The bolting stage is completed about 1 week after the initiation of stem elongation and the process of capitulum development is begun. Flowering is initiated between late July and mid- August. Cross-pollination is necessary for seed set which is completed by the end of August. …