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Articles 63751 - 63780 of 72250
Full-Text Articles in Entire DC Network
No. 041 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Shih-Kang Tung
No. 041 Newsletter - Association For Asian Studies. Committee On East Asian Libraries, Shih-Kang Tung
Journal of East Asian Libraries
No abstract provided.
The Life History And Pathology Of Sanguinicola Klamathensis Wales In Salmo Clarki Henshawi Gill And Jordan At Hagerman National Fish Hatchery, Idaho, Wallace Arwood Evans
The Life History And Pathology Of Sanguinicola Klamathensis Wales In Salmo Clarki Henshawi Gill And Jordan At Hagerman National Fish Hatchery, Idaho, Wallace Arwood Evans
Theses and Dissertations
There are only three species of blood flukes known in salmonids in the world. Wales (1958) described two, Sanguinicola davisi and S. klamathensis, while Meade and Pratt (1965) described Cardicola alseae.
The Effect Of Haloxon And Thiabendazole On The Free-Living Stages Of Haemonchus Contortus, Gary Mccallister
The Effect Of Haloxon And Thiabendazole On The Free-Living Stages Of Haemonchus Contortus, Gary Mccallister
Theses and Dissertations
This study was undertaken to determine the effect of thiabendazole and haloxon on the free-living stages of Haemonchus contortus and to determine the suitability of the free-living stages for their use in primary drug evaluation for chemotherapy or for chemical control of free-living stages. Cleaned unembryonated ova, embryonated ova, first-, second-, third-, and exsheathed third-stage larvae were exposed to suspensions of 5.0%, 1.0%, 0.5%, 0.25%, 0.12%, 0.05%, and water soluble concentrations of each drug for exposure times of 0.25, 0.50, 1.0, 2.0, 4.0, 8.0, and 16.0 hours at pH 7.0 and 25° C. Survival was assessed by observing any subsequent …
State Of Bacterial Dna After Uptake Into The Roots Of Germinating Barley Seeds, Larry Dale Lawson
State Of Bacterial Dna After Uptake Into The Roots Of Germinating Barley Seeds, Larry Dale Lawson
Theses and Dissertations
Germinating barley seeds have been shown to take up Bacillus subtilis DNA labelled with 5-bromouracil and tritiated thymidine and retain the DNA in the root system without substantially degrading it. The percentage of bacterial DNA recovered from the total root DNA was independent of the amount of bacterial DNA available for uptake. Four observations indicated the stability of bacterial DNA after uptake into barley roots: (1) the bacterial DNA retained its transforming ability after recovery from the roots; (2) the labelled B. subtilis DNA showed similar CsCl density gradient patterns before uptake and after uptake; (3) most of the radioactivity …
Light And Electron Microscopy Investigation Of Developing Wheat Caryopses Infected By Tilletia, Melvin Douglas Grove
Light And Electron Microscopy Investigation Of Developing Wheat Caryopses Infected By Tilletia, Melvin Douglas Grove
Theses and Dissertations
Caryopses of wheat were studied during infection by Tilletia caries and T. controversa. Initially the pathogens penetrated embryos of the host. After the embryo tissue was consumed by the fungi, endosperm tissue was penetrated and consumed. Initial penetration of endosperm tissue was in localized areas. During infection the fungus mycelium spread intercellularly, but occasionally was seen intracellularly. As the host tissue was consumed teliospores were formed. At maturity a host cell layer 4-6 cells thick remained which retained the mature teliospores. Histochemical studies indicated that carbohydrates and lipids of the host disappeared soon after invasion by the pathogens. Nuclei and …
Reproductive Life History Of Catostomus Ardens And Catostomus Discobolus In The Weber River, Utah, James K. Andreasen
Reproductive Life History Of Catostomus Ardens And Catostomus Discobolus In The Weber River, Utah, James K. Andreasen
Theses and Dissertations
Fish of the family Catostomidae, consisting of 11 genera and about 57 species, comprise a significant part of the fish fauna of Western North America. Life history information of some species is available (Bailey, 1969, and Brown and Graham, 1953, Catostomus catostomus; Dence, 1948, .f. commersoni; Douglas, 1952, Xyrauchen texanus; Geen et al., 1966, C. catostomus and C. coI!Dllersoni; Greenfield et al., 1970, .f. santannae; Harris, 1962, C. catostomus; Hauser, 1969,C. platyrhynchus; MacPhee, 1960, .f. macrocheilus; Nelson, 1968, .f.cotmnersoni and C. macrocheilus; Raney and Webster, 1942, C. commersoni; Smith, 1966, entire subgenus Pantosteus; Spoor, 1938, C. commersoni; Willsrud, 1966, C. …
Ultrastructure Of Histochemically Localized Cholinesterases In Central And Peripheral Nervous Systems Of Two Insects: Periplaneta Americana L. And Acheta Domestica L, Clifford James Stratton
Ultrastructure Of Histochemically Localized Cholinesterases In Central And Peripheral Nervous Systems Of Two Insects: Periplaneta Americana L. And Acheta Domestica L, Clifford James Stratton
Theses and Dissertations
Cholinesterase (ChE) was histochemically localized by three methods in the sixth abdominal ganglion and the femur of crickets and cockroaches using light and electron microscopy. The light microscopy showed that ChE in insect femur could be readily demonstrated. The ultrastructural data showed enzyme activity: in ganglion - neural lamella, perineurium, axolemma, inside axons, along glia and at probable synapses; in peripheral nerves - in glial cells, sarcoplasmic reticulum, T-system, axolemma, sarcolemma and at neuromuscular junctions. All activity was inhibited with 10-4 eserine except in the neural lamella, suggesting cholinesterase at all of the above sites except the neural lamella where …
History Of The Swedish Mission Of The Church Of Jesus Christ Of Latter-Day Saints 1905-1973, Carl Erik Johansson
History Of The Swedish Mission Of The Church Of Jesus Christ Of Latter-Day Saints 1905-1973, Carl Erik Johansson
Theses and Dissertations
The study traced major developments in the Swedish Mission. A decided help in this undertaking was the author's own long association with the Mormons in Sweden. The government attempted to prevent Mormon proselyting in the first two decades. This ended in a tacit approval for the Mormons to carry on. The conditions between both world wars induced fairly successful "hold-the-fort" efforts. Youth conferences were especially vital in building a spirit of unity among Swedish Mormons.
The period after the second world war showed several definite trends. Membership increased three-fold to more than 5000. Chapels were acquired. Organizations on the mission …
Life History And Ecology Of The Great Basin Sagebrush Swift, Sceloporus Graciosus Graciosus Baird And Girard, 1852, Gary L. Burkholder
Life History And Ecology Of The Great Basin Sagebrush Swift, Sceloporus Graciosus Graciosus Baird And Girard, 1852, Gary L. Burkholder
Theses and Dissertations
The sagebrush swift, Sceloporus graciosus graciosus, is abundant in the transitional zone of the Great Basin. As an intermediate link the the food chain, sagebrush swifts are preyed upon by snakes and hawks, and in turn are predators of small arthropods.
The Effect Of Tobacco Mosaic Virus Infection On The Activity Of Ribulose-1,5-Diphosphate Carboxylase From Three Varieties Of Lycopersicon Esculentum Miller, Yu-Sun-Kitty Chang
The Effect Of Tobacco Mosaic Virus Infection On The Activity Of Ribulose-1,5-Diphosphate Carboxylase From Three Varieties Of Lycopersicon Esculentum Miller, Yu-Sun-Kitty Chang
Theses and Dissertations
Control and TMV-infected leaf tissues of three varieties of tomatoes, Marglobe, Moscow and Delicious, were analyzed for Ribulose Diphosphate Carboxylase (RuDPCase). The specific activity of RuDPCase based on protein concentration determined by peak area obtained with the Model E Ultracentrifuge, specific activity of RuDPCase based on protein concentration determined by Lowry's method, total amount of RuDPCase per gram fresh weight, total protein of plant leaves, total chlorophyll, and ratio of Chlorophyll a to Chlorophyll b were determined. Tobacco Mosaic Virus (TMV) infection resulted in an increase in specific activity of RuDPCase and the amount of total protein (at 2 days …
I. An Isothermal Titration Microcalorimeter. Ii. Importance Of Micronutrients In Nutrition. Iii. Zinc Bibliography, John Willard Gardner
I. An Isothermal Titration Microcalorimeter. Ii. Importance Of Micronutrients In Nutrition. Iii. Zinc Bibliography, John Willard Gardner
Theses and Dissertations
I. An isothermal titration microcalorimeter having a colume of 4 ml and capable of temerature control to ±2 x 10-5°C is described. Major components include a constant temperature water bath controlled to ±3 x 10-4°C, a platinum reation vessel, and an isothermal control circuit consisting of constant Peltier thermoelectric cooling and variable Joule heating controlled by a thermistor in an AC Wheatstone bridge circuit. The calorimeter was tested by measuring the heat of ionization of water and was found to produce data accurate to ± 0.1% where small samples are used such as in the investigation of many biological systems.
The Effects Of Deficiencies Of Certain Mineral Nutrients On The Activity And Various Properties Of Ribulose-1,5-Diphosphate Carboxylase From Barley (Hordeum Vulgare L.), Philip Alan Harrison
The Effects Of Deficiencies Of Certain Mineral Nutrients On The Activity And Various Properties Of Ribulose-1,5-Diphosphate Carboxylase From Barley (Hordeum Vulgare L.), Philip Alan Harrison
Theses and Dissertations
Barley plants grown in Mg, Mn, Zn and Cu deficient media were analyzed for specific activity, total activity and amount of RuDPCase present. Percent dry weight, as well as chlorophyll and soluble protein content were determined. All deficiencies caused lower chlorophyll and RuDPCase concentrations than occurred in the control. Soluble protein content, however, was higher in all deficient plants than in the control, either on a dry or a fresh weight basis. The addition of 18 μM Mn^2+ increased the activity of Mg^2+ containing RuDPCase preparations as much as 133% above normal. The specific activity of RuDPCase from Mg, Mn, …
Helminth Parasites Of Dogs In Two Central Utah Communities, Lari Michael Norton Cowgill
Helminth Parasites Of Dogs In Two Central Utah Communities, Lari Michael Norton Cowgill
Theses and Dissertations
Parasitic helminths probably consitute one of the most important groups of disease agents in dogs. In the Southern and Central United States dogs are often fatally infected with the canine esophageal worm, Spirocerca lupi, and the ca nine heartworm, Dirofilaria immitis. Cestodes which can limit the growth of a dog are found throughout the United States.
Community Characteristics Of Six Burned Aspen-Conifer Sites And Their Related Animal Use /|Clarry H. Kleinman, Larry H. Kleinman
Community Characteristics Of Six Burned Aspen-Conifer Sites And Their Related Animal Use /|Clarry H. Kleinman, Larry H. Kleinman
Theses and Dissertations
Six forest areas destroyed by fire representing different seral stages of aspen development and conifer invasion were studied to determine successional dynamics and the related livestock and big game use. Factors measured were: (a) age, basal area, density and frequency of aspen and conifer trees; (b) density and frequency of under-story species; (c) forage production for forbs, grasses, and browse, and (d) animal-days use for deer, cattle and sheep. Aspen appeared in the community the spring following the fire and conifers appeared fifteen to twenty years later. Conifers had begun to dominate aspen on an eighty-two year old stand. The …
Fate And Metabolism Of Bas 290-H In A Model Ecosystem, Kuo-Mei Chang
Fate And Metabolism Of Bas 290-H In A Model Ecosystem, Kuo-Mei Chang
Theses and Dissertations
The use of chemicals to control economic pests has grown in this century both in the amount and the diversity of materials used (Headley and Lewis, 1967). About ten billion pounds of pesticides have been used in the United States since 1945. It is estimated that there are 340 million acres of cultivated lands in the Continental United States. Of this amount, approximately 119 million acres were sprayed with herbicides, 97 million acres were treated with insecticides and 25 million acres were treated with fungicides and other minor pesticides (Matsumura, 1972).
Interaction Between Triiodothyronine (T₃) And Thyroxine (T₄) In The Chick And The Rat, Kurtis George Cornish
Interaction Between Triiodothyronine (T₃) And Thyroxine (T₄) In The Chick And The Rat, Kurtis George Cornish
Theses and Dissertations
The secretion of two hormones with identical function by the thyroid gland has been questioned, What is the relationship between these two hormones? Why does the thyroid secrete two hormones when either one can provide for all the activity of the thyroid (Greer, 1972). Little work has been done on the relationship between the two hormones. There is some evidence showing that thyroxine (T4) is deiodinated to triiouothyronine (T3) at the tissue level in mammals. Chambers (1970) found that there was a negative interaction between T4 and T3 when pharmacologic doses were administered to the rat. The present study was …
Three New Species Of Petrified Dicotyledonous Wood From The Lower Cretaceous Cedar Mountain Formation Of Utah, Gregory F. Thayn
Three New Species Of Petrified Dicotyledonous Wood From The Lower Cretaceous Cedar Mountain Formation Of Utah, Gregory F. Thayn
Theses and Dissertations
Two genera and three species of definite fossil angiosperm wood have been identified from the diverse flora of the Lower Cretaceous Cedar Mountain Formation of Utah for the first time. Well preserved fossil dicotyledonous woods have been found in association with the fern Tempskya and conifer woods at two sites, one east of Castle Dale, Utah 1 and one east of Ferron, Utah. Petrified logs were collected from a horizon between ten and thirty feet below the overlying Dakota Sandstone at the Castle Dale site. Dakota Sandstone is missing at the Ferron site, but the wood occurs on the surface …
Habitat And Time Utilization Of A Pair Of Nesting Sharp-Shinned Hawks (Accipiter Striatus Velox) : A Telemetry Study, Joseph Belnap Platt
Habitat And Time Utilization Of A Pair Of Nesting Sharp-Shinned Hawks (Accipiter Striatus Velox) : A Telemetry Study, Joseph Belnap Platt
Theses and Dissertations
Telemetric observations were conducted on a pair of Sharp-Shinned Hawks (Accipiter striatus velox) nesting in Spanish Fork Canyon, Utah in 1972. The movements of both adults were monitored from the time their eggs hatched in late June until they left the study area in early August, fourty-two days later. A transmitter was also attached to one of the young at the time of fledging. The adult's main hunting area was a single plant community located 1600 meters from the nest. The male performed the majority of the foraging while the female spent the greatest part of her time at the …
Front Matter, Vol. 18 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 18 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Biographical Sketch Of J. Reuben Clark, Jr., David H. Yarn Jr.
Biographical Sketch Of J. Reuben Clark, Jr., David H. Yarn Jr.
BYU Studies
No abstract provided.
The Political Thought Of President Clark, Marion G. Romney
The Political Thought Of President Clark, Marion G. Romney
BYU Studies
No abstract provided.
Panel Discussion On J. Reuben Clark, Jr. November 21, 1972, Ray C. Hillam, Martin B. Hickman, James B. Allen, Neal A. Maxwell, Robert S. Jordan
Panel Discussion On J. Reuben Clark, Jr. November 21, 1972, Ray C. Hillam, Martin B. Hickman, James B. Allen, Neal A. Maxwell, Robert S. Jordan
BYU Studies
No abstract provided.
J. Reuben Clark, Jr.: Under Secretary Of State, Lee H. Burke
J. Reuben Clark, Jr.: Under Secretary Of State, Lee H. Burke
BYU Studies
No abstract provided.
The Ambassadorial Years: Some Insights, Martin B. Hickman
The Ambassadorial Years: Some Insights, Martin B. Hickman
BYU Studies
No abstract provided.
J. Reuben Clark, Jr., And The United Nations, Stan A. Taylor
J. Reuben Clark, Jr., And The United Nations, Stan A. Taylor
BYU Studies
No abstract provided.
J. Reuben Clark, Jr.: Political Isolationism Revisited, Martin B. Hickman, Ray C. Hillam
J. Reuben Clark, Jr.: Political Isolationism Revisited, Martin B. Hickman, Ray C. Hillam
BYU Studies
No abstract provided.
J. Reuben Clark, Jr., And The American Approach To Foreign Policy, Robert S. Wood, Stan A. Taylor
J. Reuben Clark, Jr., And The American Approach To Foreign Policy, Robert S. Wood, Stan A. Taylor
BYU Studies
No abstract provided.
Full Issue, Byu Studies
Introduction, Ray C. Hillam