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Articles 41641 - 41670 of 42629
Full-Text Articles in Entire DC Network
Bird Hazards To Aircraft, Victor E. F. Solmon
Bird Hazards To Aircraft, Victor E. F. Solmon
Bird Control Seminars Proceedings
When I spoke to the third Bird Control Seminar in 1966 on "Ecological Control of Bird Hazards to Aircraft", I reviewed what we had accomplished up to that time. I spoke about the extent of the problem, the bird species involved and the methods we used to make the airports less attractive to birds that created hazards to aircraft.
I wish to discuss today our accomplishments since 1966. I have presented a number of papers on the topic including one with Dr. W. W. H. Gunn, in 1967 at a meeting in the United Kingdom, and others in the United …
Registered Participants: Fifth Bird Control Seminar (1970)
Registered Participants: Fifth Bird Control Seminar (1970)
Bird Control Seminars Proceedings
Names and addresses of 97 participants.
The Ias Bulletin, V4n4, September 1970, Iowa Academy Of Science
The Ias Bulletin, V4n4, September 1970, Iowa Academy Of Science
IAS Bulletin
In this issue:
--- Officers, Directors, and Section Chairmen, 1970-71
--- Roster of Committees
--- New Blood in the Board
--- Board Meeting October 31
--- Publications Committee to Meet
--- annual Meeting Committee to Meet
--- Chemistry Teachers of Central Iowa May Organize
--- Cooperative Project for Two-Year Colleges Underway
--- Request for Information on Environmental Education Materials
--- Academy Sponsors Environmental Education Conference
--- Indiana Academy Sets up Agency to Work with State Government
--- Northern Regional NSTA Conference
--- Correction to the Annual Report and Membership List
--- Gleanings from the Michigan Academy Newsletter
--- UNI Conservationist …
The Effects Of Various Treatments On Thiamin Diphosphate And Total Thiamin Levels Of Rat Tissues, Dong Hwa Park
The Effects Of Various Treatments On Thiamin Diphosphate And Total Thiamin Levels Of Rat Tissues, Dong Hwa Park
Theses and Dissertations
Tissue thiamin diphosphate was assayed enzymatically utilizing purified brewer's yeast apotransketolase. With this assay ten uumoles of thiamin diphosphate could be detected. Total thiamin was fluorometrically measured. For one to three days rats were placed under conditions of stress, consisting of loud noise treatment, emotional stress, deprivation of paradoxical sleep, and swimming to exhaustion, respectively. The body weight was markedly decreased at the end of the respective experimental periods except with the loud noise treated group, compared with the corresponding controls. Following two to three such consecutive treatments, the adrenal weight also showed a significant increase. Thiamin diphosphate and total …
Hydrologic Inventory Of The Weber River Study Unit, Frank W. Haws, Roland W. Jeppson, A. Leon Huber
Hydrologic Inventory Of The Weber River Study Unit, Frank W. Haws, Roland W. Jeppson, A. Leon Huber
Reports
The 1963 Utah State Legislature authorized the Utah Water and Power Board (now the Utah Division of Water Resources) to develop a state water plan in order to give coordination and direction to the activities of all state and federal agencies concerned with Utah's water resources. To facilitate the development of this plan, a proposal was submitted through the State Planning Coordinator in the Governor's Office to the Urban Renewal Administration of the Housing and Home Finance Agency. Funding was approved effective May 19, 1966, under the Urban Planning Assistance Program authorized by Section 701 of the Housing Act of …
Erasure Of Sediment Surface Features By Mellita Quinquiesperforata (Leske), Walter Richard Boehmer
Erasure Of Sediment Surface Features By Mellita Quinquiesperforata (Leske), Walter Richard Boehmer
OES Theses and Dissertations
Erasure of sediment surface features by individuals of the species, Mellita guinguiesperforata, observed in this study suggests that all members of the sub-order, Scutellina, are able to erase sediment surface features. Sweep time, the time needed to erase the surface features of an area, depends on the population density, individual size, and speed of movement of the sand dollars. Assuming their pattern of movement as random, the following equation can be used to determine sand dollar sweep time,
T - 3.2 N-0.76 (W / S) (A/ W2 )1.21
where T is sweep time, N is the …
Preparation Of New Amino-, Thio-, And Sulfonyladamantane Derivatives, Joseph Craig Argyle
Preparation Of New Amino-, Thio-, And Sulfonyladamantane Derivatives, Joseph Craig Argyle
Theses and Dissertations
Various synthetic schemes were used to prepare a number of new amino-thio- and sulfonyladamantane compounds. By a nucleophilic substitution on 1-bromoadamantane, 1-(p-nitrophenylthio)adamantane was prepared from p-nitrothiophenol; the amino- and sulfonyl- derivatives of this compound were also prepared. Silver tosylate was used to generate the 1-adamantyl carbonium ion from 1-bromoadamantane in a synthetically useful procedure for preparing 1-adamantylamides from nitriles. Three 1-(1-adamantylcarbinyl)-2,5-dialkylpyrroles were prepared by Knorr-Paal reactions and reduced to the corresponding pyrrolidines. Thio- and aminomethyl 1-adamantyl ketones were prepared from methyl and bromomethyl 1-adamantyl ketones, respectively. Aliphatic and aromatic oxiranes were reacted with 1-aminoadamantane in a bomb at elevated temperatures …
Water Resources News, Volume 2, No. 6, June-July 1970
Water Resources News, Volume 2, No. 6, June-July 1970
Water Current Newsletter
OWRR Title II Proposals Invited
Studies of Brine Water Disposal
Sediment Pollution from Road Building to be Controlled
Graduate Studies in Water Resources
University of Nebraska Water Resources Planning and Management Program Approved
Research Needed on Oil Pollution Source Identification
Third Outdoor Recreation Research Catalog Announced
Cost Study Shows Need for Increased Municipal Spending for Water Pollution Control
National Conference on Environmental Pollution
Canadian Water Sales May Become Reality
$344,000 Contract Awarded Gillette Research by FWQA to Develop Phosphate-Free Detergents
Meeting "Challenge of the Environment" is Corps of Engineers' Greatest Challenge
Sand Hills is Test Ground This Summer
NWRRI Annual …
The Enzymatic Oxidation Of Aldehydes By Xanthine Oxidase, Duane Beal Gregory
The Enzymatic Oxidation Of Aldehydes By Xanthine Oxidase, Duane Beal Gregory
All Master's Theses
As early as sixty years ago, the existence of an enzyme from mammalian tissues which catalyzed the oxidation of xanthine and hypoxanthine was recognized. The name given the enzyme was derived from its earliest recognized action, hence xanthine oxidase. Although little is known about the biological functions of the enzyme, the high affinity shown for xanthine and hypoxanthine may indicate that these are the most significant substrates biologically.
The Synthesis And Properties Of New Potentially Chemotheraputic [Sic] Pteridine Derivatives, Walter Wesley Parish
The Synthesis And Properties Of New Potentially Chemotheraputic [Sic] Pteridine Derivatives, Walter Wesley Parish
Theses and Dissertations
A new general synthetic method for the preparation of 6-thiopteridines has been developed. The method involves the addition of thiols to intermediate pyrimidine nitrones formed in situ by the reaction of 4-amino-5-nitrosopyrimidines with pyridinium-activated acetonitriles, acetates, acetophenones, and other methylketones. Ca. forty new pteridines were prepared by this method. The preparation of six new 6-pteridinyl ketones, two new 6- pteridinyl ketone thiosemicarbazones, and two new 6-sulfonylpteridines and their 4-acetamido derivatives is also reported. 4-Acetamido-2- amino-7-phenylpteridine 5-oxide was prepared by the reaction of 2- amino-4,6-diacetamido-5-nitrosopyrimidine with either phenylsulfonyl-acetophenone or phenacylpyridinium bromide. Evidence relating to the structure of the acylated 4-amino-5- nitrosopyrimidines …
Record In Rock: A Handbook Of The Invertebrate Fossils Of Nebraska, Roger K. Pabian
Record In Rock: A Handbook Of The Invertebrate Fossils Of Nebraska, Roger K. Pabian
Conservation and Survey Division: Faculty and Staff Publications
Table of Contents:
Introduction
What Are Fossils? How Do They Form?
Fossilization
How Are Fossiliferous Rocks Formed?
What is Paleontology?
What Can Fossils Tell Us?
Fossils and Geologic Time
Fossils as Environmental Indicators
Fossils and Conservation
How Are Fossils Named?
Where Are Fossils Found?
Collecting Courtesy
Tools for Collecting Fossils
Tips on Collecting Fossils
Safety Rules
Quarry Safety
Safety Don'ts to Remember
Preparation of Specimens
A Bit of Advice
General Characteristics of Nebraska's Important Fossils
Phylum Protozoa (Single-Celled Animals)
The Living Protozoan
Fossil Protozoans from Nebraska
Phylum Porifera (Pore Bearers or Sponges)
The Living Sponge
Fossil Sponges from Nebraska
Phylum …
An In Vivo Perfusion Apparatus For Studies On Gingival Disease In The Albino Rat : Assessment By A Perfusion Of The Enzymes Collagenase And Hyaluronidase, James A. Smith
Loma Linda University Electronic Theses, Dissertations & Projects
This thesis describes an in vivo perfusion apparatus which can continuously deliver controlled quantities of solutions to localized, contralateral intraoral areas in albino rats. Three animals were per fused on the experimental area (the mesial sulcular area of the maxillary first molar) on one side with tap water and Trypan blue. Localization of the solution delivered and minimal histological changes due to the presence of the apparatus was demonstrated on these animals. Solutions of .5%, 1%, and 2% hyaluronidase and collagenase were perfused on the experimental areas of nine animals. When both enzymes were used, hyaluronidase always preceded collagenase in …
Planning Aspects Of Pollution Control, Donald T. Cannell
Planning Aspects Of Pollution Control, Donald T. Cannell
Marine Affairs Theses and Major Papers
Pollution control and abatement has become a national social goal but improvement impeded by lack of adequate resource allocation. The uncertainties of technology, financing, nature, politics, law and institutionalism must be evaluated by corporate and government planners to find long-run solutions. The evaluation of the sensitivity of planning recommendations to the uncertainty involved in this multi-variate problem, along with national economic shifts caused by alternative abatement funding programs is critical in formulating the “best” plan to ensure success of the national program.
Natural Sovereignty On The High Seas, Thomas Arthur Marnane
Natural Sovereignty On The High Seas, Thomas Arthur Marnane
Marine Affairs Theses and Major Papers
The purpose of this paper is to examine a current dispute involving resources in the sea, determine the issues involved, and hypothesize a solution. Specifically, the dispute chosen involves Latin American claims to extensive sovereign fishery rights in adjacent coastal waters and objections to these claims. The United States and the parties to a declaration made in Santiago, Chile, in 1882, Chile, Ecuador, and Peru, have been chosen as most representative of the opposing positions. The International Court of Justice, primarily utilizing as a framework for analysis the dicta, findings, and opinions in their February 1969 Judgment in the North …
Thermal Requirements To Protect Aquatic Life, Clarence M. Tarzwell
Thermal Requirements To Protect Aquatic Life, Clarence M. Tarzwell
United States Environmental Protection Agency: Publications
Water temperatures affect aquatic organisms in a number of ways, both directly and indirectly. Some of the latter effects are quite subtle. High temperatures can have direct lethal effects but sublethal levels operating over long periods can be just as harmful through delayed lethal effects and the production of nonlethal stresses which eventually result in changes in the population, reduced growth or reproduction, and the lowering of resistance to parasites, dis ease, and competitors. Temperature, in combination with certain other factors such as day length, influences re producing processes. High water temperatures may stimulate or retard migration, spawning, feeding, and …
Water Resources News, Volume 2, No. 5, May 1970
Water Resources News, Volume 2, No. 5, May 1970
Water Current Newsletter
Proposal Deadlines for Research Projects
Mr. Eugene Eaton Visits Nebraska Institute
Eutrophication Publication Available
Symposium on Man-Made Lakes
National Science Foundation Provides Grant for Students
Department of the Interior to Sponsor Conference on Environmental Pollution
President Signs Water Quality Improvement Act of 1970
Possible Reclamation of Wastewater for Denver?
Water Quality Administration Seeks Studies on Cost of Preventing Pollution
New Pollution Control Proposed by Secretary Hickel
High-Priority Problem Areas
Research Review
New Publications Received by the Institute
Evaluation Of Molting Areas Of Great Basin Canada Geese, Paul D. Arneson
Evaluation Of Molting Areas Of Great Basin Canada Geese, Paul D. Arneson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Environmental factors at Neponset and Woodruff Narrows reservoirs were evaluated to determine their effects on molting Canada geese. More geese utilized Woodruff Narrows. Geese apparently favored the larger expanse of open water and adequate food supply.
Most of the molting geese were from the Bear River drainage. Some geese came from scattered areas in Utah, Idaho, Wyoming, and Montana. After molting, the geese flew to migration staging areas in southeastern Idaho before migrating to wintering areas in southern California and Arizona.
Females outnumbered males by 6 percent. The mean annual mortality rate for adult geese was 42 percent. Recovery rates …
A Study To Demonstrate The Immediate Destination Of An Embolus Formed In The Lumen Of A Peripheral Venous Catheter, Rosemarie Morikone Emori
A Study To Demonstrate The Immediate Destination Of An Embolus Formed In The Lumen Of A Peripheral Venous Catheter, Rosemarie Morikone Emori
Loma Linda University Electronic Theses, Dissertations & Projects
This study was designed to show the immediate destination of an embolus formed in the lumen of an intravenous catheter placed in a peripheral vessel. The hypothesis stated that clots injected into a peripheral vessel will lodge in the lungs. A subhypothesis was that the clot may lodge anywhere along the circulatory pathway.
Indications of need for the study as shown by the review of literature were the following: (1) the complications resulting from the frequent use of intravenous polyethylene catheters, (2) experimental studies that showed that clots were formed around intravenous catheters, (3) the evidence that intravenous catheters predispose …
Periodontal Pocket Reduction Following Gingival Curettage, Robert B. Tandy
Periodontal Pocket Reduction Following Gingival Curettage, Robert B. Tandy
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to evaluate pocket reduction following gingival curettage. The effects of temporary pressure packing, inflammation, oral hygiene, pocket depth, age and sex of the patient were evaluated.
Three hundred twenty-eight periodontal pockets were studied in forty-one adult patients selected with interdental lesions ranging from 3.0 - 7.5 mm. in depth. Pocket depth and gingival height were measured preoperatively, one month postoperatively and two months postoperatively. The mean change in pocket depth and gingival height was calculated and statistical significance was determined for all measurements.
The results show that after a two-month postoperative evaluation following gingival …
The Ontogeny Of Social Behavior Of Uinta Ground Squirrels, D. Andrew Saunders
The Ontogeny Of Social Behavior Of Uinta Ground Squirrels, D. Andrew Saunders
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The social behavior of juvenile Uinta ground squirrels (Spermophilus armatus) was studied for 2 1/2 years in northeastern Utah. The purpose of the study was to describe the developing social behavior of unconfined, marked squirrels. Their behavior was recorded with motion pictures and written descriptions from the time they emerged from the natal burrow until they entered hibernation.
Three phases of behavioral development were apparent. The first phase began when the juveniles appeared above ground and ended 5 weeks later. This was a period of socialization and consisted of behavioral patterns best described as play. The second phase …
Areal And Temporal Variations In Developmental Phases Of Syringa Vulgaris L. Throughout The Western United States, Joseph Michael Caprio
Areal And Temporal Variations In Developmental Phases Of Syringa Vulgaris L. Throughout The Western United States, Joseph Michael Caprio
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This paper presents the results of the analysis of 10 years of information 1957-1966 on three phases-- begin, peak and end bloom-- of the purple common lilac (Syringa vulgaris L.) using data recorded at approximately 1,000 locations throughout the Western Region of the United States.
The pattern of geographical advance of the various bloom phases is determined by both a manual mapping procedure developed by the author and by standard statistical methods. Manually drawn isophanes for the various elevations for begin bloom phase are based entirely upon the first 5 years of record, 1957-1961. A Zones of Adjustment map to …
The Effect Of Chemical Competition On Thermodynamics Of Bacterial Adsorption, Deorao R. Khairnar
The Effect Of Chemical Competition On Thermodynamics Of Bacterial Adsorption, Deorao R. Khairnar
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this investigation was to study the effect of chemical competition on thermodynamics of bacterial adsorption. This was done using an experimental system consisting of Mendon silt loam soil as the adsorbent, Staphylococcus aureus as a common adsorbate and sodium chloride (NaCl), sodium lauryl sulfate (SLS), and peptone as competitive adsorbates.
The bacterial adsorption on soil both with and without chemical competition followed Langmuir type isotherms. From the equilibrium data, thermodynamic functions such as free energy, ΔF°, enthalpy, ΔH°, and entropy, ΔS°, were calculated. Observed positive ΔH° values indicated that the bacterial uptake in both noncompetitive and competitive …
The Photochemical Reduction Of Octacyanomolybdate(V) Ion In Aqueous Solutions, Gordon W. Gray
The Photochemical Reduction Of Octacyanomolybdate(V) Ion In Aqueous Solutions, Gordon W. Gray
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The photochemical reactions occurring in aqueous solutions of octacyanomolybdate(V) ion, Mo(CN)83-, during irradiation with light of 365 and 436 nm wavelengths were studied. The quantum yields and reaction products were determined for neutral, unbuffered solutions as well as solutions buffered at pH 4.0, 7.0, and 9.0.
The results of these studies showed that the Mo(CN)83- ion is rapidly reduced by light to a Mo(IV) complex. In neutral or acidic media, the initial photoreduction product was found to be the red heptacyanoaquomolybdate(IV) ion, Mo(CN)7(H2O)3-. Photolysis in basic solution gave the …
82nd Session Of The Iowa Academy Of Science, April 24-25, 1970, Iowa Academy Of Science
82nd Session Of The Iowa Academy Of Science, April 24-25, 1970, Iowa Academy Of Science
Iowa Academy of Science Documents
No abstract provided.
State Of The Fisheries Report 1968/1969, Department Of Fisheries And Fauna, Western Australia
State Of The Fisheries Report 1968/1969, Department Of Fisheries And Fauna, Western Australia
Status Reports of the Fisheries and Aquatic Resources
The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.
Frontmatter And Contents
Vertebrate Pest Conference Proceedings: 4th (1970)
PROCEEDINGS: FOURTH VERTEBRATE PEST CCONFERENCE held at El Rancho Hotel, West Sacramento, California, March 3, 4 and 5, 1970. Edited By Richard H. Dana, Conference Chairman. Sponsored by the California Vertebrate Pest Committee
Opening Remarks - Fourth Vertebrate Pest Conference, Richard H. Dana
Opening Remarks - Fourth Vertebrate Pest Conference, Richard H. Dana
Vertebrate Pest Conference Proceedings: 4th (1970)
I am pleased to welcome you to the Fourth Vertebrate Pest Conference. This is our second Sacramento meeting. The first was in 1962 - eight years ago. It was an historic occasion. It was the first conference devoted exclusively to vertebrate pests. This conference is sponsored by the California Vertebrate Pest Committee comprised of representatives from the California Department of Agriculture, the University of California at Davis, Department of Animal Physiology and the Agricultural Extension Service; the U. S. Bureau of Sport Fisheries and Wildlife, Division of Wildlife Services and of Wildlife Research, the California Departments of Public Health, Fish …
Keynote Address --- "The Year Of Ecology", Robert I. Cushing
Keynote Address --- "The Year Of Ecology", Robert I. Cushing
Vertebrate Pest Conference Proceedings: 4th (1970)
It seems to me that there are at least two things we should be concerned about. First, I believe there is a real possibility that the environmental quality bandwagon will get to playing so loud and to rolling so fast that there can be some unfavorable consequences in food production and processing-—the job I work at and that some of you work at. Second, I believe there are signs that we could lose our balance—-that we could be making decisions on emotional instead of rational grounds. Reason seems to be in danger from an epidemic of emotion. And we need …
Outlook For Rodenticides And Avicides Registration, James O. Lee
Outlook For Rodenticides And Avicides Registration, James O. Lee
Vertebrate Pest Conference Proceedings: 4th (1970)
The history of pesticide regulations is presented. Major emphasis is on federal regulations. The evaluation of avicides and rodenticides is discussed and related to regu¬lations. Currently registered avicides and rodenticides are described along with a listing of efficacy criteria requirements. The future of registration of avicides and rodenticides is projected.
The Pharmacology Of Rodenticides, S. A. Peoples
The Pharmacology Of Rodenticides, S. A. Peoples
Vertebrate Pest Conference Proceedings: 4th (1970)
The compounds used as rodenticides are tremendously varied in their chemical structure and mechanism of action. With a few exceptions, these agents are generally poisonous to all animals, including man, and a great deal of study has been directed to their toxicity in animals other than rodents. However, the development of new compounds as Norbormide and certain antifertility drugs which are highly selective in their action may justify the hope that the ideal rodenticide free of secondary toxic hazards will soon be available. Until this happy announcement is made, a review of the pharmacology of the older compounds is in …