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Articles 64411 - 64440 of 64844
Full-Text Articles in Entire DC Network
A Modern Philosopher's Stone, Grant Gill Smith
A Modern Philosopher's Stone, Grant Gill Smith
Faculty Honor Lectures
Alchemists, the forerunners of chemists, for more than a millennium sought the "Philosopher's Stone"-the transmuting agent that could change imperfect base metals such as lead and tin to the noble metals, gold and silver, and also serve as the Elixir of Life to heal the infirmities of man and prolong his existence on earth.
Where alchemy failed, chemistry, in little more than a century, has succeeded in finding the "Philosopher's Stone," for it is now not only possible to transmute one metal into another and heal many of man's infirmities, but scarcely a facet of man's life has not been …
Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Iii, Thomas Barrett
Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Iii, Thomas Barrett
Green Revolution
Reprint of section of book Earthworms by Thomas Barrett.
Food Safety Program: Endrin Monitoring In The Mississippi River, Arthur F. Novak, M. R. Ramachandra Rao
Food Safety Program: Endrin Monitoring In The Mississippi River, Arthur F. Novak, M. R. Ramachandra Rao
Journal of the Minnesota Academy of Science
Twelve successive monthly samplings and analyses of representative fish and shellfish and of mud and water from the lower Mississippi River showed neither a high concentration of endrin nor a time-ordered change in the concentration. The general absence of endrin from the samples indicated no significant contamination.
The Fate Of Pesticide Residues In Soil, Russell S. Adams Jr.
The Fate Of Pesticide Residues In Soil, Russell S. Adams Jr.
Journal of the Minnesota Academy of Science
Pesticidal chemicals may be lost from or inactivated in soil by volatilization, leaching, sorption, chemical' degradation, microbial decomposition, or plant removal. The persistence of o pesticide in soil depends upon the chemical nature of the pesticide and certain characteristics of the soil. Soil mineral and organic colloids sorb these compounds very tightly and restrict microbial decomposition of the pesticide. Conditions favoring microbial activity in the soil also favor the disappearance of pesticide residues. Factors that contribute to the persistence of o pesticide ore the some factors that increase its persistence.
Quantitative Analysis Of Stream Flow Rate Extremes, Hugh M. Jeffus
Quantitative Analysis Of Stream Flow Rate Extremes, Hugh M. Jeffus
Arkansas Water Resources Center Technical Reports
Stream discharge data for the State of Arkansas is analyzed for representative statistical parameters. The statistical distribution most applicable to stream discharge data in Arkansas is the Pearson type III skew frequency curve. The parameters of the Pearson type III curve for all available records in Arkansas are included as Appendix A. The parameters of the logarithmically normal frequency distribution are included as Appendix B for mean daily discharge, minimum daily discharge and instantaneous minimum daily discharge. The logarithmically normal frequency distribution may be used for the lower discharge rates in lieu of the Pearson type III distribution except where …
New Soils Chief Appointed, Department Of Agriculture, Western Australia
New Soils Chief Appointed, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
The appointment of Mr. S. T. Smith to the position of Commissioner of Soil Conservation and Chief of the Soils Division in the Department of Agriculture was announced last month.
A New Species Of Rhinoceros, Aphelops Kimballensis, From The Latest Pliocene Of Nebraska, Lloyd G. Tanner
A New Species Of Rhinoceros, Aphelops Kimballensis, From The Latest Pliocene Of Nebraska, Lloyd G. Tanner
Bulletin of the University of Nebraska State Museum (1924–2023)
An uncrushed skull and associated skeletal elements of a very large rhinoceros are the basis for the description of a new species of Aphelops from Frontier County, Nebraska. The major differences are: the skull is much larger in most dimensions than other Aphelops; it has an extremely elevated occipital region in comparison to Aphelops mutilus; the narial notch is retracted to a point perpendicular to the center of molar one; and the teeth are more hypsodont than any other species of this genus. The sediments which yielded the skull and skeletal parts are considered to be Kimballian in …
The Monotypic North American Subgenus Larandrena Of Andrena (Hymenoptera: Apoidea), D. W. Ribble
The Monotypic North American Subgenus Larandrena Of Andrena (Hymenoptera: Apoidea), D. W. Ribble
Bulletin of the University of Nebraska State Museum (1924–2023)
Larandrena contains a single species, A. miserabilis Cresson. This small, common Andrena is found throughout most of the United States and southern Canada in the spring. The subgeneric position, nomenclature, redescription. variation, notes on the biology, parasites, range, seasonal activity and plant host records are included. A. rniserabilis is thought to be an important pollinator of fruit trees.
Citellus Kimballensis, A New Late Pliocene Ground Squirrel, Douglas C. Kent
Citellus Kimballensis, A New Late Pliocene Ground Squirrel, Douglas C. Kent
Bulletin of the University of Nebraska State Museum (1924–2023)
A new fossil sciurid, Citellus kimballensis, is described. This new species was found in the Kimball Formation, uppermost Ogallala (very late Pliocene) at the University of Nebraska State Museum Collecting Locality Cn-1O1, northeast of Sidney, Cheyenne County, Nebraska. Characters of the dentition and skull of C. kimballensis are compared with those of other species of the genus, and with those of Cynomys.
The Brule-Gering (Oligocene-Miocene) Contact In The Wildcat Ridge Area Of Western Nebraska, C. Bertrand Schultz, Charles H. Falkenbach, Carl F. Vondra
The Brule-Gering (Oligocene-Miocene) Contact In The Wildcat Ridge Area Of Western Nebraska, C. Bertrand Schultz, Charles H. Falkenbach, Carl F. Vondra
Bulletin of the University of Nebraska State Museum (1924–2023)
The contact between the Brule Formation (Oligocene) and the Gering Formation (Miocene) can be readily distinguished in the Wildcat Ridge area, as elsewhere in western Nebraska. At the critical fossiliferous exposures at Castle Rock in Scotts Bluff County, the contact on the south face between the two formations is defined as 129 feet above the base of the "Upper Ash" bed, which corresponds to the upper portion of Darton's (1899, PI. C, Fig. D, following p. 754) "sandy phase" in the upper part of the Brule. Certain key beds in the Gering Formation can be traced laterally from a channel …
Review Of The Economic Benefits And Costs Resulting From Dewey Reservoir, David H. Rosenbaum
Review Of The Economic Benefits And Costs Resulting From Dewey Reservoir, David H. Rosenbaum
KWRRI Research Reports
The purpose of this investigation was to study the economic effects of the construction of Dewey Reservoir in Floyd County, Kentucky. Primary emphasis was placed on determining the degree the project had shifted income to this economically underdeveloped area by determining the incomes of those receiving project benefits and those paying project costs. The income redistribution effects of all benefits and costs associated with Dewey Reservoir were evaluated by assuming that the Federal income tax structure indicates the marginal value of income to individuals in the various income brackets.
Major benefits from the Dewey Project have been: flood control, $722,166 …
Engineering For The Human Environment, Frank E. Moss
Engineering For The Human Environment, Frank E. Moss
Reports
President's Introduction: The environment of man has been the subject of intensive studies in recent years as the dangers of pollution became increasingly evident. The atmostphere we breathe, the water we drink, the food we eat, all are endangered by defilement. Thre resolution of the conflict can came only through a asystematic reordering of the national way of life so that man himself will not fall victim to the wastes of his civilization. For forty years Utah State University has been vitally concerned with the problems of pollution. Utah State surveys and studies have revealed the effects of pollutants on …
Administrative Budget Needs 1967-69, Utah Water Research Laboratory
Administrative Budget Needs 1967-69, Utah Water Research Laboratory
Reports
No abstract provided.
Proceedings Of A Symposium: Pollution Control Of Industrial Wastewaters, Calvin K. Sudweeks, Lynn M. Thatcher, Elmo Morgan, Franklin J. Agardy, R. E. Pailthorp, John C. Merrell Jr.
Proceedings Of A Symposium: Pollution Control Of Industrial Wastewaters, Calvin K. Sudweeks, Lynn M. Thatcher, Elmo Morgan, Franklin J. Agardy, R. E. Pailthorp, John C. Merrell Jr.
Reports
No abstract provided.
Groundwater Development In Arid Basins, Dean F. Peterson Jr., Harold E. Thomas, J H. Feth, P. H. Mcgauhey, James H. Milligan, Wayne D. Criddle, Judge Lewis Jones, Dallin W. Jensen, Calvin G. Clyde, Bartell C. Jensen, C. E. Jacob, Jay R. Bingham, E. O. Larson
Groundwater Development In Arid Basins, Dean F. Peterson Jr., Harold E. Thomas, J H. Feth, P. H. Mcgauhey, James H. Milligan, Wayne D. Criddle, Judge Lewis Jones, Dallin W. Jensen, Calvin G. Clyde, Bartell C. Jensen, C. E. Jacob, Jay R. Bingham, E. O. Larson
Reports
Summary: Groundwater development frequently provides a means whereby tremendous new economic opportunities are opened up. If supplies are overdrawn (mined) the ensuing regional economy may be able to affort replacements from more costly sources. In the United States the Salt River Valley of Arizona and the valleys of California provide examples. Two cases are treated in this paper, Israel and West Pakistan. In Israel, besides furnishing more than half of the basic source of water suppply, groundwater development provides opportunity for both quantity and quality management, which makes possible use of surface supplies and reclaimed sewage as firm rather than …
Control Of Air Pollution Through The Assertion Of Private Rights, Julian Conrad Juergensmeyer
Control Of Air Pollution Through The Assertion Of Private Rights, Julian Conrad Juergensmeyer
Articles by Maurer Faculty
Air pollution is clearly one of the major social problems confronting contemporary American society. Yet the United States is still without an effective federal pollution control program, and those state and local control programs that do exist are largely ineffective. Until government regulation is able to keep the expulsion of air contaminants within tolerable limits, it will be necessary for those seeking to control air pollution to rely upon the assertion of private rights. In this article the author discusses the principal causes of action available to the private pollution controller, and concludes that, although traditional legal concepts may provide …
Algal Growth Experiments In The Baradla Cave At Aggtelek (Biospeleologica Hungarica Xxi), Erzsebet Kol
Algal Growth Experiments In The Baradla Cave At Aggtelek (Biospeleologica Hungarica Xxi), Erzsebet Kol
International Journal of Speleology
The author kept 108 algal strains (Cyanophyta 53, Chlorophyta 35, Chrysophyta 20), of axenic cultures from the Kol-Algotheca in the Botanical Division of the Hungarian National Sciences Museum in the Baradla Cave, at Aggletek (Hungary) in darkness for 204-420 days under different environmental conditions. The experiments have proven that several algal strains can tolerate well the complete absence of light. Furthermore, that some algal strains show intensive development even under such conditions. These axenic cultures kept in the cave in metal boxes on inorganic medium have shown that the energy source used by these green coloured algae is not …
Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Ii, Thomas Barrett
Earthworms: Their Intensive Propagation And Use In Biological Soil Building - Part Ii, Thomas Barrett
Green Revolution
Reprint of section of book Earthworms by Thomas Barrett.
The Study Of The Metal Complexes Of Alpha Aminohydroxamic Acids, Richard N. Nipe
The Study Of The Metal Complexes Of Alpha Aminohydroxamic Acids, Richard N. Nipe
Masters Theses
Introduction
The objectives of this investigation were to develop: 1) compounds similar to hydroxy urea, a compound known to have anti-tumor activity, 2) a method to prepare α-aminohydroxamic acids and to study the complexes of these compounds with several metal ions, 3) computer programs to determine the pK's1 of the hydroxamic acids and the stepwise stability constants2 for the ligands and several metal ions.
The values obtained for the stability constants were compared with values for the stability constants of acetohydroxamic acid and α-aminocarboxylic acids in an attempt to find which in the ligand formed bonds with the …
Press Reports, Walter A. Lawrance
Blackbird Damage And Control--An Informal Seminar, M. I. Dyer
Blackbird Damage And Control--An Informal Seminar, M. I. Dyer
Bird Control Seminars Proceedings
The object is to hash over a few problems as we see them on this red-winged blackbird situation. I'm Mel Dyer, University of Guelph, Guelph, Ontario. Around the table are Tom Stockdale, Extension Wildlife Specialist, Ohio Cooperative Extension Service, Columbus; Maurice Giltz, Ohio Agriculture Research and Development Center, Wooster, Ohio; Joe Halusky, U.S. Fish and Wildlife Service, Columbus, Ohio; Daniel Stiles, U.S. Fish and Wildlife Service, Washington, D.C.; Paul Rodeheffer, U.S. Fish and Wildlife Service, Columbus, Ohio; Brian Hall, Blackbird Research Project, University of Guelph, Guelph, Ontario; George Cornwell, Virginia Polytechnic Insti¬tute, Blacksburg, Va.; Dick Warren, Peavey Grain Company, Minneapolis, …
Bird Control Methods And Devices--Comments Of The National Pest Control Association, Philip J. Spear
Bird Control Methods And Devices--Comments Of The National Pest Control Association, Philip J. Spear
Bird Control Seminars Proceedings
It may be useful to review some of the considerations that go into recommendations concerning bird management. Later I will make some comments concerning specific methods and devices being used in or promoted for bird control work regardless of whether or not they are new. Members of the National Pest Control Association provide a variety of services, such as fumigation, termite control and general pest control which includes rodent control. There are eight such categories listed in our roster, but only one member in five provides every service listed. Bird control is a rather recent development and is the newest …
Histoplasmosis--Its Relationship To Birds, E. R. Price Ph.D.
Histoplasmosis--Its Relationship To Birds, E. R. Price Ph.D.
Bird Control Seminars Proceedings
Histoplasmosis is a disease affecting man and many other ani¬mals including the dog, cat, cow, horse, and several wild animals. It is caused by a pathogenic fungus known as Histoplasma capsulatum. This fungus lives and multiplies in the ground as a mold. It prefers the undisturbed litter in and around old chicken houses or in undis¬turbed droppings under bird roosts. It has been found in the soil of dog kennels, under porches of old houses, under trees and bushes frequented by birds in the daytime. It has also been found in isolated caves and hollow trees. It apparently is capable …
Chemosterilants, Possible Control Agents, Robert Mclean
Chemosterilants, Possible Control Agents, Robert Mclean
Bird Control Seminars Proceedings
A chemosterilant may be defined as a chemical compound that reduces or destroys fertility of the treated animal. There are a variety of compounds which have an anti-fertility effect, and these com¬pounds may attack the reproductive process at any one of its many phases. Chemosterilants have a good potential as a means of population control of pest animals, because the population may be reduced with little reproductive compensation which normally follows a reduction caused by killing. The number of young produced would be reduced by preventing reproduction or by causing early mortality; therefore, there would be little compensatory increase in …
Good Practice In Bird Management, James W. Steckel
Good Practice In Bird Management, James W. Steckel
Bird Control Seminars Proceedings
I'm going to deviate a little bit from what's been said. I'd like to read to you first of all a Good Practice Statement for Bird Management that was accepted by the National Pest Control Association in the past year, 1965. I think it's important for all the people here, realizing that some of you are suppliers, some of you are from regulatory agencies, some of you are in the bird management business, and others are in¬terested in this field in many other ways. It's important for us to realize, all of us, that this field is just in the …
Frontmatter & Opening Remarks, 3rd Bird Control Seminar, William B. Jackson
Frontmatter & Opening Remarks, 3rd Bird Control Seminar, William B. Jackson
Bird Control Seminars Proceedings
Bowling Green State University, Bowling Green, Ohio, September 13-15, 1966.
Sponsored by the Department of Biology, Bowling Green State University, with the assistance of Division of Wildlife Services, United States Fish and Wildlife Service, and the National Pest Control Association, Elizabeth, New Jersey.
Dr. William B. Jackson, Conference Chairman; David E. Schneider, Conference Assistant; David E. Schneider and William B. Jackson, Editors.
Population Dynamics Of Pest Birds, Robert Mclean
Population Dynamics Of Pest Birds, Robert Mclean
Bird Control Seminars Proceedings
We want to talk now about population principles; this is our main problem dealing with populations. We should discuss the general application of population principles and the management of bird populations. The reason we can discuss this is because many species follow established principles; population growth and later regulation of its size follow certain basic rules. Many pest species follow these principles, but not always to the letter. Populations of different species, as well as of a species, vary depending upon local conditions. Local environments dictate what population levels and the growth of populations will be. Minor variabilities still fit …
Side Effects Of Persistent Toxicants, George J. Wallace
Side Effects Of Persistent Toxicants, George J. Wallace
Bird Control Seminars Proceedings
As you can see from the general tenor of the printed program for this seminar, I am in the unenviable position of trying to discourage you from certain types of chemical control; but my assigned topic "Side Effects of Persistent Toxicants," implies that mission. However, my remarks may be somewhat anticlimax at this time, because it is now generally conceded that we need to reevaluate certain chemicals in control work and to restrict or severely curtail use of those that per¬sist for long periods in the environment. So let me detail my reasons for a somewhat negative attitude toward the …
The Fecal Shedding Of Listeria Monocytogenes By Conventional And "Germ Free" Mice, Margaret Joyce Ramsay
The Fecal Shedding Of Listeria Monocytogenes By Conventional And "Germ Free" Mice, Margaret Joyce Ramsay
Loma Linda University Electronic Theses, Dissertations & Projects
A series of experiments involving Listeria monocytogenes was undertaken to study first the fecal shedding of Listeria by conventional mice challenged intraperitoneally with Listeria and second the fecal shedding and ability to survive of germ free mice with similar challenge. In addition, mites infesting Listeria infected mice were cultured for their possible contamination by Listeria.
Conventional mice were challenged intraperitoneally with a single near LD50 dose of Listeria. Fecal Listeria were detected by collecting specimens from each mouse daily for the first 4 days and every second day thereafter. The feces was held at 7°C for 14 …
The Synthesis Of Pyridazines, Cinnolines, Tetrazines, Tetrazapyrenes And Related Nitrogen Heterocycles, William D. Guither
The Synthesis Of Pyridazines, Cinnolines, Tetrazines, Tetrazapyrenes And Related Nitrogen Heterocycles, William D. Guither
Chemistry and Chemical Biology ETDs
There are many examples of nitro-substituted aromatic compounds, and of these the compounds in the benzene series have been most extensively studied. Nitro groups attached to an aromatic ring vary in reactivity toward nucleophilic displacement. For example, when two nitro groups are ortho or para to each other, one may be substituted with varying ease depending on the other substituents present. Nitro groups which are meta to one another are generally not subject to nucleophilic displacement. The mobility or ease of displacement of a nitro group by a nucleophile may be increased by introduction of other groups into the ring, …