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Articles 63571 - 63600 of 64865
Full-Text Articles in Entire DC Network
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Reports
A three phase study is used to develop disposal alternatives and cost analysis for algae laden sand scrapings removed from intermittent sand filters used to polish wastewater lagoon effluent. Phase I, Irrigation Technique, explores the feasibility of supplying sufficient water to sand scrapings to leach out entrapped material. Details of removal with amount of water applied are presented. Phase II, Soil Application, tests with lysimeters soil response to application of the algae laden sand material. Physical and chemical parameters are not markedly altered where algae laden sand is applied to the soil surface. Phase III, Plant Bioassays, grew tall fescue …
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Reports
A dual media filtration study was carried out at the central Weber Wastewater Treatment Plant in Ogden, Utah, to evaluate its feasibility as a tertiary treatment to meet new effluent quality standards. A review of the literature indicated that dual media filters were more efficient than conventional single media sand filters because of the “in depth” filtration achieved by dual media filters. An experimental filter was operated at four different hydraulic loading rates, ranging from 3 to 6 gpm/ft 2 (122.10 to 244.20 1/min/m2), to evaluate its effects on effluent quality. Hydraulic loading rate was shown not to affect suspended …
The Synthesis Of Some Potential Antimalarials : The 3-(4- Choloropheny1) -5, 7- Dichloronaphthylaminoalcohols, Dwight Allen Shamblee
The Synthesis Of Some Potential Antimalarials : The 3-(4- Choloropheny1) -5, 7- Dichloronaphthylaminoalcohols, Dwight Allen Shamblee
Master's Theses
A new scheme is presented for the preparation of 3~(4-chlorophenyl)-5,7-dichloro-l-methylnaphthalene, from which, four derivatives, 3~(4-chlorophenyl)-~-di(n-butyl)aminomethyl~5,7-dichloro-l-naphthalene-methanol hydrochloride, 3-(4-chlorophenyl)-5,7-dichloro-~-(2-piperidyl)-1-naphthalenemethanol acetate, l-[3-(4-chlorophenyl)-5,77dichloro-lnaphthyl]-3-di(n-butyl)aminopropanol hydrochloride, and 1-[3-(4-chlorophenyl)-5, 7-dichloro-l-naph,thyl]-2-(2-piperidyl) ethanol hydrochloride, were prepared. These four derivatives were submitted to Walter Reed Army Institute of Research for. the determination of their potential as antimalarial agents.
Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby
Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby
Reports
No abstract provided.
The Effects Of Boating Upon Lead Concentrations In Fish, David Oates
The Effects Of Boating Upon Lead Concentrations In Fish, David Oates
Nebraska Game and Parks Commission: Staff Research Publications
The concentration of lead in fish muscle tissue from lakes where boating is heavy and where it is prohibited was measured. The lead levels ranged from less than 0.05 to 1.35 ppm but did not differ significantly between those in the controlled and non-controlled boating lakes. Lead levels apparently pose no public health hazard.
Chlorofluorocarbon Effects On Cardiac, Pulmonary, And Respiratory Patients, Mildred E. Olson
Chlorofluorocarbon Effects On Cardiac, Pulmonary, And Respiratory Patients, Mildred E. Olson
Journal of the Minnesota Academy of Science
Research results from studies of the physiological effects of aerosal propellants on animals and people are summarized. The papers selected for this summary were published between 1968 and 1975. Effects of the 15 chlorofluorocarbons used as propellants have been recorded on the cardiac, pulmonary and respiratory functions of a number of animal species as well as man. The fifteen propellants have been classified into four groups on the basis of their degree of toxicity. Fluorocarbon 11, the most frequently used propellant, is in group 1, the most toxic. The relative toxicity of each of the 14 other propellants compared with …
The Role Of Groundwater In Eutrophication Of A Lake In Glacial Outwash Terrain, David Robert Lee
The Role Of Groundwater In Eutrophication Of A Lake In Glacial Outwash Terrain, David Robert Lee
International Journal of Speleology
The nutrient contribution of groundwater in glacial outwash terrain was evaluated at Lake Sallie in north-central U.S.A. (46°46’ N., 95° 54’ W.). Groundwater entering the lake was collected with seepage meters consisting of bottomless cylinders vented to a thin membrane bag. A theoretical flow net and comparison of nutrient concentrations in well and seepage water indicated that seepage meters can be used in high velocity discharge areas to obtain site-specific water samples of groundwater for nutrient analyses. Based on an average value of 0.25 mg/l PO4, groundwater inflow along an 800 km segment of shoreline transported 37 kg …
An Introduction To The Japanese Groundwater Animals With Reference To Their Ecology And Hygienic Significance, Kôichi Matsumoto
An Introduction To The Japanese Groundwater Animals With Reference To Their Ecology And Hygienic Significance, Kôichi Matsumoto
International Journal of Speleology
1) Nearly two hundred species of troglobites are known from the groundwaters of Japan. Most of these troglobiontic species, sixteen of seventy-seven genera, and what is more, four of forty-seven families are endemic to Japan. Uchidastygacaridae, Nipponacaridae, and Kantacaridae are endemic acaridan families of Japan. The coleopterous family, Phreatodytidae, is alto endemic to Japan. 2) Though studies on Protozoa, Turbellaria, Annelida, Aschelminthes, and Ostracoda, etc. remain sparse, the interstitial fauna is actively investigated recently and many specimens of Bathynellacea, Ingolfiella, Bogidiella, Microcerberus, Pseudovermis (Opisthobranchia), and Nerillidae, etc. have been collected from freshwater and marine environments. 3) None of the troglobites …
Foraminiferids Of The Cannonball Formation (Paleocene, Danian) In Western North Dakota, William E. Fenner
Foraminiferids Of The Cannonball Formation (Paleocene, Danian) In Western North Dakota, William E. Fenner
Theses and Dissertations
In 1974 and 1975 about 2800 samples (of which 265 contained foraminiferids) of the Cannonball Formation were collected from 60 water test wells and two oil wells in Adams, Bowman, Burleigh, Divide, Dunn, Grant, Mercer, Morton, Oliver, Sioux, and Ward Counties in western North Dakota. Fifty species of benthonic foraminiferids and four species of planktonic foraminiferids were identified including eight textulariines, two milio lines and 44 rotaliines. Taxa reported for the first time from the Can nonball include: Reophax sp. (2 species), Ammobaculites expansus Plummer, Spiroplectammina wilcoxensis Cushman and Ponton, Quinqueloculina plummerae Cushman and Todd, Dentalina eocenica Cushman, Lenticulina alabamensis …
Individual Residential Wastewater Treatment, Robert H. Mcneal
Individual Residential Wastewater Treatment, Robert H. Mcneal
Retrospective Theses and Dissertations
No abstract provided.
Nature And Human Nature, Lee M. Talbot, Neil H. Cheek Jr, Roderick Nash, William R. Burch Jr., Ed
Nature And Human Nature, Lee M. Talbot, Neil H. Cheek Jr, Roderick Nash, William R. Burch Jr., Ed
Yale School of the Environment Bulletin Series
No abstract provided.
Video Tape : An Old-New Instructional Aid In The Physics Laboratory, Fanny Mercedes Torres Holguin
Video Tape : An Old-New Instructional Aid In The Physics Laboratory, Fanny Mercedes Torres Holguin
University of the Pacific Theses and Dissertations
My objective is to use the video-tape as another medium -- along with overhead projector, textbooks, guides of apprenticeship, pictures, lab equipment and suggestions from the programs and new trends in physics teaching -- being used to supplement our efforts in trying to reach more and more of our students The use of audiovisual media, and generally speaking the use of technology in education, can be constructive or destructive, can e very powerful in developing "human beings" or "robots", can increase the rate of apprenticeship, or can produce an educational catastrophe. However, it will heavily depend on the the professor, …
Proceedings Of The Great Plains Wildlife Damage Control Workshop, F. Robert Henderson
Proceedings Of The Great Plains Wildlife Damage Control Workshop, F. Robert Henderson
Great Plains Wildlife Damage Control Workshop Proceedings
Program Planning Committee
Prairie Dog Control, A. Orville Sandall
Prairie Dog Control, A. Orville Sandall
Great Plains Wildlife Damage Control Workshop Proceedings
Before poisons were taken from the market, I had about fifteen years experience working for the Fish and Wildlife Service doing prairie dog control work. Most of this work was done for private landowners and supervising work crews for the Forest Service and B&A.
Thoughts About Wildlife Damage Control, Raymond W. Matheny
Thoughts About Wildlife Damage Control, Raymond W. Matheny
Great Plains Wildlife Damage Control Workshop Proceedings
Gentleman, it is my intention today to give you a brief history of EPA and its involvement in predator control, outline basic registration requirements for pesticides, show slides of the use of sodium cyanide capsules in the M-44 ejector mechanism in the experimental use permit programs and comment upon the restrictions set forth in Administrator Train's ORDER of September 16, 1975.
Ground Squirrels And How To Control Them, Irving J. Mork
Ground Squirrels And How To Control Them, Irving J. Mork
Great Plains Wildlife Damage Control Workshop Proceedings
The Richardson ground squirrel, otherwise known as the flickertail or gray gopher, is common over most of North Dakota north and east of the Missouri River, although they were never common in the immediate Red River Valley.
Bird Control, Glen Orr
Bird Control, Glen Orr
Great Plains Wildlife Damage Control Workshop Proceedings
We started our program in 1967 primarily because of an economic problem in the downtown area of Wichita. We had about eight square blocks of businesses which were not getting any business because people didn't dare go downtown in the evening unless they wore their rain hats and rain gear, and I mean this literally.
Raccoon Damage Control, W. Alan Wentz
Raccoon Damage Control, W. Alan Wentz
Great Plains Wildlife Damage Control Workshop Proceedings
Raccoons are found throughout the United States, and in most cases they are expanding their range into previously unoccupied habitats. Raccoons are often water-associated, but in the Great Plains they often occur a considerable distance from the water. In the Great Plains states, the expansion of agriculture has apparently allowed raccoons to move westward and northward. It is possible that the availability of old homesteads, buildings, haystacks, dumps, and towns has been instrumental in allowing raccoons to survive the winter.
Beaver Damage Control, James E. Miller
Beaver Damage Control, James E. Miller
Great Plains Wildlife Damage Control Workshop Proceedings
The beaver (Castor canadensis), our largest North American rodent, is praised by many as being a natural conservationist; however, to others he is a destructive nuisance and pest. In many chronicles, the beaver is lauded to be one of the resources that speeded up the settling of our Great Northwest Territory. Certainly, such explorers as Lewis and Clark depended greatly upon the beaver hide for revenue as well as varter.
An Overview Of Problem Bird Management - Rural And Urban, Joseph L. Guarino
An Overview Of Problem Bird Management - Rural And Urban, Joseph L. Guarino
Great Plains Wildlife Damage Control Workshop Proceedings
The economic impact of birds on agricultural crops in the U.S. is quite substantial -- perhaps as much as $100 million dollars. Methods for reducing this damage can be categorized as biological, mechanical, and chemical. The chemical approach appears to have the most potential. An avian repellent, methiocarb, has proven to be effective for reducing damage by a variety of species of birds to many sprouting and ripening crops and fruit. An avian chemical frightening agent, 4-aminopyridine (Avitrol), if federall registered for use for protecting ripening field corn and sweet corn and was shown to be effective for reducing damage …
Bird Control, George C. Halazon
Bird Control, George C. Halazon
Great Plains Wildlife Damage Control Workshop Proceedings
We did a little work with pigeon sterilants six years ago. We didn't really have too much luck on bird control on pigeons because of the life of the pigeon. In other words we couldn't do it fast enough to satisfy the public because of the relatively large numbers of years required before the bird dies.
A Live Trap For Birds Attending A Feeding Station, J.L. Hart, L.L. Todd
A Live Trap For Birds Attending A Feeding Station, J.L. Hart, L.L. Todd
Great Plains Wildlife Damage Control Workshop Proceedings
An effective live trap for capturing nuthatches, titmice, and woodpeckers was constucted from hail screen and modified mouse traps. Over 88 percent of active sets resulted in captures.
Controlling Mole Damage, F. Robert Henderson
Controlling Mole Damage, F. Robert Henderson
Great Plains Wildlife Damage Control Workshop Proceedings
The kind of mole found in Kansas is the eastern mole, Scalopus aquaticus. Moles are small, mouse-sized mammals adapted to living underground. They are characterized by enlarged forefeet with long claws, stout necks and powerful shoulders which make them capable burrowers. Unlike those of mice and shrews, the noses and forefeet of moles are pink and hairless.
The Coyote As A Game Animal, Edward L. Kozicky
The Coyote As A Game Animal, Edward L. Kozicky
Great Plains Wildlife Damage Control Workshop Proceedings
Coyote hunting is a very special challenge. Even though coyotes may be abundant in an area, that doesn't mean that they're easy to bag with a rifle. However, I happen to enjoy coyote calling to the point where the shooting is almost anti-climax. Others like to hunt coyotes with either sight or trail hounds, to pursue coyotes with all-terrain vehicles, and to spot coyotes while driving through the country.
Progress In Coyote Hunting Depredations Research, Samuel B. Linhart
Progress In Coyote Hunting Depredations Research, Samuel B. Linhart
Great Plains Wildlife Damage Control Workshop Proceedings
Coyote depredations control research from the end of World War II to about 1960 was characterized by low levels of funding, a minimum of research facilities, an emphasis on lethal agents, few legislative restrictions, a lack of public interest, and little concern for the environment. Establishment of the Leopold Committee (1964) and Cain Committee (1971) were evidence of a growing public concern and awareness of the coyote-livestock problem.
Control Of White-Tailed Deer In Field And Orchard, Forrest D. Loomis, Ronald Ogden
Control Of White-Tailed Deer In Field And Orchard, Forrest D. Loomis, Ronald Ogden
Great Plains Wildlife Damage Control Workshop Proceedings
As deer populations increase in most areas of the mid-west, and deer habitat is constantly shrinking because of man's activities, damage done to crops, orchards, and other plantings is increasing. No new or revolutionary control or repellent has been perfected to alleviate this complex problem. Annual hunting still offers the best and cheapest method of control.
Montana Golden Eagle Removal And Translocation Project, Norton R. Miner
Montana Golden Eagle Removal And Translocation Project, Norton R. Miner
Great Plains Wildlife Damage Control Workshop Proceedings
History of Depredations History of Sheep Industry Trapping Program Eagle Population Techniques for Capture Care of a Captive Eagle Methods of Transport Release Sites Results
Cultural And Physical Methods For Managing Problem Birds, Donald F. Mott
Cultural And Physical Methods For Managing Problem Birds, Donald F. Mott
Great Plains Wildlife Damage Control Workshop Proceedings
Although chemicals now available (or that soon should be) appear to be the answer to many bird problems in agricultural crops, it is appropriate to also review some of the cultural and physical methods currently in use.
Training Needs For Future Extension Wildlife Programs, R.J. Robel
Training Needs For Future Extension Wildlife Programs, R.J. Robel
Great Plains Wildlife Damage Control Workshop Proceedings
I want to discuss the need for additional educational opportunities for people who will be trying to reduce wildlife damage in the future.
Pest Control Operator Involvement In Wildlife Control, Robert R. Schendel
Pest Control Operator Involvement In Wildlife Control, Robert R. Schendel
Great Plains Wildlife Damage Control Workshop Proceedings
Pest Control