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Articles 78031 - 78060 of 78501
Full-Text Articles in Entire DC Network
Special Report (1960), Walter A. Lawrance
Special Report (1960), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Addition Of Sodium Nitrate (1960), Walter A. Lawrance
Addition Of Sodium Nitrate (1960), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
The Dilute Solution Chemistry Of Antimony, Kent H. Jones
The Dilute Solution Chemistry Of Antimony, Kent H. Jones
Chemistry and Chemical Biology ETDs
Investigation of the chemistry of the elements by conventional methods is generally limited to concentrations on the order of 10-5 M or higher. The discovery of radio-activity opened new fields in chemistry among which is the obtaining of information concerning chemical behavior of elements at very low concentrations. For many years after the initial discovery of radioactivity in 1896 by Becquerel, the study of low-concentration chemistry was limited to about ten naturally occurring radioactive elements. A renewed interest in this field was generated after 1934 when it was discovered by Curie and Joliot that radioactive elements could be artificially …
The Vitamin B1-Sparing Action Of Sorbitol, Gisela Eleanor Bethsold
The Vitamin B1-Sparing Action Of Sorbitol, Gisela Eleanor Bethsold
Theses and Dissertations
The present study was initiated to determine the effect sorbitol has upon the enzymatic functions of thiamin; specifically, what effect sorbitol bas upon the alpha-ketoglutarate and pyruvate dehydrogenases activities of rat liver mitochondria. In addition, the effect of varying the dietary sorbitol concentration on the development of an athiaminosis was studied, particularly the effect on growth rate.
The Effects Of Flouride Ion On Some Blood Constituents Of Rainbow Trout, Salmo Gairdneri, Linnaeus, Richard H. Alger
The Effects Of Flouride Ion On Some Blood Constituents Of Rainbow Trout, Salmo Gairdneri, Linnaeus, Richard H. Alger
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
During the past quarter of a century there has been considerable investigation into the effects of fluorides on living organisms. It has been well established, as a result of these studies, that both small and elevated amounts of fluorides present in the environment may have a marked toxic effect upon gaining entry into the organism. Much of the research involving fluorides and the living organism has been confined to experimentation with animals, although considerable evidence indicates that plants are also subject to injury if fluorides are present in the atmosphere or the soil.
The great majority of the research dealing …
Life History Notes On The Walleye, Stizostedion Vitreum Vitreum (Mitchill) In A Turbid Water, Utah Lake, Utah, Billy B. Arnold
Life History Notes On The Walleye, Stizostedion Vitreum Vitreum (Mitchill) In A Turbid Water, Utah Lake, Utah, Billy B. Arnold
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Early in 1952, walleye fry were stocked for the first time in Utah Lake. Subsequent plants were made in 1954, 1955 and 1956. Altogether, over two million fry have been stocked.
By January, 1958, it was felt sufficient time had elapsed for the species to establish patterns of growth, reproduction, food habits and consequent relationships to the new environment. Thus, on January 1, 1958, a Federal Aid to Fisheries project, number DJ F-4-R-5, job T, was initiated. This project was entitled "investigations of Yellow Pikeperch and Channel Catfish of Utah Lake, Utah County." Although the closing date was December 31, …
Interaction Of Riboflavin With Molybdenum, Jacques Tocatlian
Interaction Of Riboflavin With Molybdenum, Jacques Tocatlian
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Molybdenum may function as a catalyst in promoting and controlling some of the complex chemical reactions that go on in living systems. The lack of understanding which exists about these reactions is due to their obvious complexity and to the extremely minute quantities of molybdenum involved. Traces of molybdenum have been shown to have spectacular results on the growth of plants when added to certain soils. This metal is also required for the growth of azobacter, the nitrogen-fixing bacteria (1).
Molybdenum has been shown to be present in four enzymes: nitrate reductase (2), hydrogenase (3), xanthine oxidase (4) and aldehyde …
A Study Of The Kinetics Of The Oxidation Of Uranium(Iv) By Cerium(Iv), Floyd Beatty Baker
A Study Of The Kinetics Of The Oxidation Of Uranium(Iv) By Cerium(Iv), Floyd Beatty Baker
Chemistry and Chemical Biology ETDs
The kinetics of a number of oxidation-reduction reactions and exchange reactions involving cations of the transition and inner transition elements have been extensively reviewed by T. W. Newton and S. W. Rabideau. These workers represent the formation of the activated complex by an equation which includes only the principal species in solution as reactants.
Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation
Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation
Publications (WR)
During the fall of 1959, monolayer behavior studies were made on two lakes in the southwest; Boulder Basin of Lake Mead, Nevada, and Lake Sahuaro near Phoenix, Arizona. These studies were made to evaluate the effect of geographical and climatological conditions on movement and behavior of monolayers. The Lake Sahuaro tests also were used to provide data for design and development of improved methods of application and maintenance of a film on this lake in anticipation of full scale, evaporation-reduction tests to be performed there during the summer of I960. The Lake Mead studies produced the following general points of …
The Nebraska Sandhill Lakes: Their Characteristics And Fisheries Management Problems, D. B. Mccarraher
The Nebraska Sandhill Lakes: Their Characteristics And Fisheries Management Problems, D. B. Mccarraher
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
A brief look at the map of Nebraska will readily point out the obvious fact that the sandhills comprise a considerable portion of the land area of the state. To be more precise, an area encompassing around 20,000 square miles or about one quarter of the total state area. This is indeed a vast prairie region long noted for its fine cattle and native hay crops. It is a region of vegetative dune sandhills, sandy basins and valleys, exposed ground water, spring seep lakes and marshes. Since much is already known concerning the land portion of the sandhills it is …
Rabbit Control In 1960, C Marshall
Rabbit Control In 1960, C Marshall
Journal of the Department of Agriculture, Western Australia, Series 4
IN the year 1859, an enthusiastic sportsman in Victoria took delivery from the clipper "Lightning" of a small consignment of wild European rabbits which he joyfully released on his estate at Barwon Park, near Geelong, in order to assure himself of some rough shooting.
He was not the only rabbit importer on record—tame rabbits were brought into Australia before and after 1895 and doubtless there were other importations of the wild rabbit—but he is generally credited—or discredited—with having triggered off the rabbit plague.
Bluebush Seed Supplies, C V. Malcolm
Bluebush Seed Supplies, C V. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
A GREAT deal of publicity has been given of late to the value of bluebush (Kochia brevifolia) as a plant for some types of salt-affected land, particularly in the drier parts of the wheatbelt.
Obtaining seed supplies can be a problem, but fortunately large amounts of seed are not required since once a few bushes are established they will spread seed over the intervening areas.
Thus rates of 1 to 2 lb of seed per acre have been found quite satisfactory.
Weed Research. 7. Weed Control Around The Yard, Geoffrey A. Pearce
Weed Research. 7. Weed Control Around The Yard, Geoffrey A. Pearce
Journal of the Department of Agriculture, Western Australia, Series 4
MANY farmers and city householders have weed problems around houses and sheds which can be readily overcome by treatment with appropriate herbicides.
The risk from fire through weeds and unslightly growth can easily be removed and an area free of any plant growth can be maintained with little effort for a considerable period.
Pike Hybrids (Esox Lucius X E. Vermiculatus) In A Sandhill Lake, Nebraska, D. B. Mccarraher
Pike Hybrids (Esox Lucius X E. Vermiculatus) In A Sandhill Lake, Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
In the sandhill region of Nebraska both northern pike, Esox lucius, and grass pickerel, Esox vermiculatus, are abundant in several shallow natural lakes. Both species are known to utilize the same vegetative habitat for spawning during March and April. The pike is an important game species but the smaller pickerel is of little value to fishermen although in winter is at times taken by angling through the ice.
Annual Report- Game Division, Lloyd P. Vance, Shirley Lindholm
Annual Report- Game Division, Lloyd P. Vance, Shirley Lindholm
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Two classes of game farm permits were made available by the 1957 legislature to persons keeping protected species of wildlife in captivity. A pet or fancier permit authorizes the possession of fifty or less game birds or game animals where no commercial use is made of such wildlife. A commercial permit authorizes the possession of game birds and game and fur-bearing animals of regardless of number, where trade, sale, barter, or any commercial use is involved. During 1960, 195 pet permits and 92 commercial permits were issued for a total of 287 permits. In 1959 a total of 432 permits …
Studies In The Mulga Pastoral Zone. 1. The Grazing Of Wandarrie Grass Associations, D G. Wilcox
Studies In The Mulga Pastoral Zone. 1. The Grazing Of Wandarrie Grass Associations, D G. Wilcox
Journal of the Department of Agriculture, Western Australia, Series 4
THE establishment of the Wiluna office of the North-West Branch marked the commencement of a series of investigations into the pastures of the mulga zone.
Unlike the agricultural areas where a fund of knowledge exists on the growth habits of the pastures, the pastures of this area were completely unknown.
The preliminary investigations had to be aimed at forming an understanding of the reactions of the various plants to rain, to temperature and seasonal conditions and to grazing in an area of extremely low rainfall reliability.
Some Limnological Conditions Relative To Winter Kill Of Fish In Ice-Covered Representative Farm Ponds In Eastern South Dakota, Jerome L. Johnson
Some Limnological Conditions Relative To Winter Kill Of Fish In Ice-Covered Representative Farm Ponds In Eastern South Dakota, Jerome L. Johnson
Electronic Theses and Dissertations
An aquatic environment involves many complex relationships biologically, physically, and chemically. Many of these relationships are difficult to measure or are little understood. In nature, aquatic environments accommodate many types of aquatic life. Ecological disturbances may cause the environment to become unfit for economically important forms of life. Human interferences often causes polluted waters and naturally occurring disturbances are common. A disturbance of this kind is one of the major problems of fisheries management in the northern Great Plains area – seasonal anaerobosis of fish or other aquatic animals and plants, commonly known as winter kill. Winter kill is usually …
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation
Publications (WR)
Reservoirs are becoming an increasingly prominent feature of the American landscape. Built for flood mitigation and to change a fluctuating river into a dependable source of water for irrigation, power, and other purposes, they are predestined, like natural lakes, to be destroyed sometime following their creation. Sedimentation sooner or later robs most lakes and reservoirs of their capacity to store water. The significance of sedimentation in the life of Lake Mead, the largest artificial reservoir in the world, was realized when the plan for the reservoir was conceived, and an aerial survey of the floor was made in 1935 before …
Tetracycline-7-Boronic Acid, William Denham Rhoads
Tetracycline-7-Boronic Acid, William Denham Rhoads
University of the Pacific Theses and Dissertations
The objective of this study is the preparation of a tetracycline-boron-10 derivative which is stable under biological conditions. The boron-10 should then provide a concentration of material capable of accepting thermal neutrons, thus producing localized high-energy alpha radiation. The fact that the tetracyclines are not retained by normal tissue should remove the danger of destruction of this tissue.
Spectroscopic Studies Of Metal-Cyanide Complexes: Part 1: Infrared And Visible Absorption Studies Of Cyanide Complexes Of Ni(Ii) In Aqueous Solution, Part 2: An Analysis Of The Infrared Vibrational Spectra Of The Tetracyanonickelate(Ii) Ion In The Solid State, Roy L. Mccullough
Chemistry and Chemical Biology ETDs
In this work, further evidence has been collected establishing the existence of a new ionic species in solutions of sodium tetracyanonickelate(II) and sodium cyanide. Contrary to the literature, however, this work shows that the species is [Ni(CN)5]-3 rather than [Ni(CN)6]-4.
The Monadnock Volume 34, Number 1, December 1959, Clark University Geographical Society
The Monadnock Volume 34, Number 1, December 1959, Clark University Geographical Society
The Monadnock (Clark Geographical Society)
Volume 34, Issue 1 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).
Space Focus, Space Enterprises, Inc.
Space Journal, Vol. 2, No. 2, December 1959, Space Enterprises, Inc.
Space Journal, Vol. 2, No. 2, December 1959, Space Enterprises, Inc.
Space Journal
No abstract provided.
A Search For The Space Man's Food, Robert G. Tischer
A Search For The Space Man's Food, Robert G. Tischer
Space Journal
No abstract provided.
Addition Of Sodium Nitrate (1959), Walter A. Lawrance
Addition Of Sodium Nitrate (1959), Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Odor Report (1959), Walter A. Lawrance
Space Journal, Vol. 2, No. 1, September 1959, Space Enterprises, Inc.
Space Journal, Vol. 2, No. 1, September 1959, Space Enterprises, Inc.
Space Journal
No abstract provided.
Time For A Change/Project Able And Baker, Douglass B. Spears Jr., Space Enterprises, Inc.
Time For A Change/Project Able And Baker, Douglass B. Spears Jr., Space Enterprises, Inc.
Space Journal
No abstract provided.
Reaction, Space Enterprises, Inc.
Studies On The Biological Oxidation Of Ferrous Iron And Chalcopyrite, Loral Alvin Decker
Studies On The Biological Oxidation Of Ferrous Iron And Chalcopyrite, Loral Alvin Decker
Theses and Dissertations
The purpose of this investigation was to determine the effectiveness of the leaching streams from waste copper ore dumps as a nutrient solution for subsequent biological oxidation and solubilization of sulfide minerals. The copper in the leaching streams is precipitated by displacement with iron. As a result of this procedure the solution is high in ferrous iron concentration and has a pH of near 3.7. The bacteria in the leaching streams are capable of oxidizing ferrous iron to the ferric state and sulfide minerals to sulfates. The effects of temperatures, pH, urea, and aeration rate on the oxidation of the …