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Articles 691 - 720 of 727

Full-Text Articles in Environmental Health and Protection

Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton Jan 1973

Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton

United States Environmental Protection Agency: Publications

Fathead minnows were exposed to a series or concentrations of a copper, cadmium and zinc mixture during a 12.5 month chronic test in water of 200 mg 1-1 total hardness. The metal concentrations in the mixture were selected on the basis of results obtained during previous chronic exposures to each of the metals individually in the same water. Strict summation of the chronic toxicities of the metals was not indicated when they were tested in combination. Toxic effects of the mixture attributable to copper appeared to be increased, but that attributable to cadmium was reduced. The effects thought to …


Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert Jan 1973

Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert

United States Environmental Protection Agency: Publications

The toxic effects of capt an on survival, growth, and reproduction of fathead minnows (Pimephales promelas) and on survival of bluegiIIs (Lepomis macrochirus) and brook trout (Salvelinus fontinalis) were determined in a flow-through system. In a 45-week exposure of fathead minnows, survival and growth were adversely affected at 39.5 μLg/Iiter. Adverse effects on spawning were suspected but not statisticaIly demonstrated at 39.5 and 16.5 μLg/Iiter. The maximum acceptable toxicant concentration (MATC), based on survival and growth, lies between 39.5 and 16.5 μLg/liter. The lethal threshold concentration (LTC) derived from acute exposures was 64 μLg/liter, …


Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount Jan 1973

Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount

United States Environmental Protection Agency: Publications

Fathead minnows (Pimephales promelas Rafinesque) were continuously exposed to reduced pH levels of 4.5, 5.2, 5.9, 6.6 and 7.5 (control) during a 13-month, one-generation test. Survival was not affected, even at the lowest pH tested. Fish behavior was abnormal, and fish were deformed at pH 4.5 and 5.2. Egg production and egg hatchability were reduced at pH 5.9 and lower, and all eggs were abnormal. A pH of 6.6 was marginal for vital life functions, but safe for continuous exposure. Free carbon dioxide, liberated by the addition of sulfuric acid to reduce the pH, may have had an unknown …


Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon Feb 1972

Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon

United States Environmental Protection Agency: Publications

A small Florida lake has been receiving a regimen of nutrient addition equivalent to 500 mg/m3-yr N and 43 mg/m3-yr P since 1967. Data has been accumulated through 1969. The effect on the lacustrine ecosystem of various biogenes includes production by primary producers, species diversity of plankton and certain production estimates at the secondary trophic level using natural populations of planktivorous fish. Plankton production using isotopic carbon is ca. 58 grms/m2-yr; Species diversity is slowly changing to a mixed chlorophycean and yellow-green. Biomass of benthic green filamentous types has increased slightly. Nutrient addition has …


An Argument For The Open Ocean Siting Of Coastal Thermal Electric Plants, Clarence M. Tarzwell Jan 1972

An Argument For The Open Ocean Siting Of Coastal Thermal Electric Plants, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

A great deal of research is yet to be done before we will definitely know all the effects of thermal electric generating plants. It is evident, however, that the chlorination of the intake water is definitely lethal to a high percentage of planktonic and other organisms; that thermal shock is detrimental to some of the more sensitive forms; that the continued exposure to high temperatures after thermal shock is lethal to many forms, especially the zooplankton; that the screening and turbulence in such plants is lethal to larval fishes and several invertebrates, and that immense amounts of waters are put …


Plant Cover For Bare And Salt Affected Land, Department Of Agriculture, Western Australia Jan 1972

Plant Cover For Bare And Salt Affected Land, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

The contributions made by this State to land reclamation were recognised at an international level last year.

Mr. C. V. Malcolm, a research officer with the Soils Division, presented a paper entitled "Establishing Shrubs in Saline Environments" at a symposium on Useful Wildland Shrubs, Their Biology and Utilisation, at Utah State University, Logan, Utah.

The conclusion to Mr. Malcolm's review, set out below, summarises much of what is known about shrub establishment in saline areas.


Final Report Emission Inventory For The State Of Nebraska, The Ibm Corporation Federal Systems Division, Environmental Protection Agency Jul 1971

Final Report Emission Inventory For The State Of Nebraska, The Ibm Corporation Federal Systems Division, Environmental Protection Agency

United States Environmental Protection Agency: Publications

The following report represents the results of the work performed under BOA 68-02-0043, Task Order Number 1 from The Environmental Protection Agency, Air Pollution Control Office. A note of thanks is due to Mr. E. J. Lillis and D. Dunbar of the EPA Project Office and Mr. Peter Culver, the EPA Project Engineer for their assistance and excellent cooperation during the study. A note of special thanks is due to Mr. Gene Robinson of the Nebraska Division of Air Pollution Control without whose efforts successful completion of this task would not have been possible.


Real Property Owned. By The Federal Government In The' State Of Nebraska, U.S. Environmental Protection Agency Jun 1971

Real Property Owned. By The Federal Government In The' State Of Nebraska, U.S. Environmental Protection Agency

United States Environmental Protection Agency: Publications

This inventory report Is a summary compilation of the major facilities of real property owned by the Federal Government in this state. The installations are listed alphabetically by the city in which they are located and the listing includes a brief description of the installation, the agency which operates the facility, the GSA inventory number, the GSA location code, the total floor area of all the buildings and a size classification code. The operating agency and Installation descriptions are those reported to the General Services Administration as of June 30, 1970. Installations with a total floor area less than 1,500 …


Ua45/6 Attack On The Environment, Wku Registrar May 1971

Ua45/6 Attack On The Environment, Wku Registrar

WKU Administration Documents

Elvis Stahr's 1971 commencement speech.


Ua77/1 Western Alumnus, Vol. 39, No 5, Wku Alumni Association Apr 1971

Ua77/1 Western Alumnus, Vol. 39, No 5, Wku Alumni Association

WKU Administration Documents

WKU alumni magazine. Features the following articles:

  • What's Going On In Teacher Education? - Tate Page Hall
  • Conway, Sheila. Faithful Servant of Generations - Shirley Posey
  • Cravens, Raymond. Western & the Accreditation Process
  • The Educational World: Where Does Western Stand?
  • Photo Feature: Downing University Center
  • Armstrong, Don. The Environment & Cornfield Calculus - Marvin Russell
  • Service Lives On at Western - Alpha Phi Omega, Gamma Sigma Sigma, Gamma Beta Phi, Circle K
  • Wilder, Jerry. Undergraduate Advisement: They Shall Not Fail!
  • Downing, Dero. Founder's Day Meditation
  • Cochran, Robert. What Do We Mean by School Public Relations?
  • Given, Ed. Hitch-Hiker on Football's …


Bioassay Procedures For Oil And Oil Dispersant Toxicity Evaluation, Gilles Laroche, Ronald Eisler, Clarence M. Tarzwell Nov 1970

Bioassay Procedures For Oil And Oil Dispersant Toxicity Evaluation, Gilles Laroche, Ronald Eisler, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Hazards to marine and estuarine fauna associated with offshore drilling of oil and with transport of large quantities of oils via tankers are numerous and understandable. At present, there is a growing body of evidence on adverse effects to these organisms of crude oil (1) (2) (3) (4) (5) (6) (7) (8) (9) and chemical oil counteracting agents or dispersants (5) (6) (9) (10) (11) (12) (13) (14) (15) (16) (17). These effects are well summarized by Smith (18) and by Carthy and Arthur (19).

Comparatively few workers have studied the influence of oil-dispersant mixtures of marine life. Studies by …


Ua12/2/1 College Heights Herald, Vol. 49, No. 46, Wku Student Affairs May 1970

Ua12/2/1 College Heights Herald, Vol. 49, No. 46, Wku Student Affairs

WKU Administration Documents

WKU Campus Newspaper Reporting Campus, Athletic and Bowling Green, Kentucky News. This issue contains articles:

  • Sutherland, David. Regents Okay Plans for Married Housing
  • Dr. J.P. Cornette to Deliver Spring Commencement
  • Two Comic Operas Billed to Begin Thursday Night
  • Dr. Hubert Marshall to Speak on Campus Tuesday
  • Star Performers to Bow Out – Kathy Walters, Bill Nelson
  • Kappa Delta Seeks Okay for House
  • Western Coed to Represent State in Miss USA Contest – Joanna Smith
  • International Club to Elect Officers
  • Wendell Ford to Speak Here Tomorrow
  • Late Start Better Than None at All – Married Student Housing
  • Lack of Money Forces …


Thermal Requirements To Protect Aquatic Life, Clarence M. Tarzwell May 1970

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 …


Ua12/2/1 College Heights Herald, Vol. 49, No. 42, Wku Student Affairs Apr 1970

Ua12/2/1 College Heights Herald, Vol. 49, No. 42, Wku Student Affairs

WKU Administration Documents

WKU Campus Newspaper Reporting Campus, Athletic and Bowling Green, Kentucky News. This issue contains articles:

  • Environmental Discussions Seek Ways to Save the Earth
  • Blood, Sweat, Tears, Concert Set Saturday
  • U.S.-Soviet Affairs Lecture Set Tonight – John Stoessinger
  • Paper, Yearbook Applications Due
  • Todd, Tom. Enthusiastic Reception Welcomes Southern Folk Festival Performers
  • Miller, Joyce. Greeks Continue Spirited Jousting
  • Environmental Teach-In is Designed to Inform
  • Visitor’s Parking Should Be Added
  • Dowd, James. Answers Vendetta – Military Recruiters
  • Ferguson, Brent. Disagrees with Disagrees – Military Recruiters
  • Bennett, Ellen. Breathing Air May Be Hazardous to Your Health
  • Population Boom: Challenge of 70’s
  • Litter Causes Untold …


Ua12/2/1 College Heights Herald, Vol. 49, No. 41, Wku Student Affairs Apr 1970

Ua12/2/1 College Heights Herald, Vol. 49, No. 41, Wku Student Affairs

WKU Administration Documents

WKU Campus Newspaper Reporting Campus, Athletic and Bowling Green, Kentucky News. This issue contains articles:

  • Walls, Gary. Three-Day Environment Probe Begins with Sessions Monday
  • Miller, Joyce. Festive Week Begins Sunday for Greeks
  • Veterans Village to Succumb to University Expansion
  • Applications Due Wednesday for Publications Positions
  • Greek Carnival Set Tomorrow
  • Western Holds Kentucky Education Association Breakfast
  • On Western Faculty 47 Years
  • Dr. Gordon Wilson Sr. Dies
  • Women’s Dorms to Study Problems of Students
  • Senior Art Exhibits on Display in Gallery
  • Cinema ’70 to Show ‘The Promoter’
  • Environmental Teach-In Deserves Wide Support
  • Ressler, Ed. Deplores Dorms
  • Watkins, Eddie. Wants Married Housing
  • Willingham, …


Ua12/2/1 College Heights Herald, Vol. 49, No. 40, Wku Student Affairs Mar 1970

Ua12/2/1 College Heights Herald, Vol. 49, No. 40, Wku Student Affairs

WKU Administration Documents

WKU Campus Newspaper Reporting Campus, Athletic and Bowling Green, Kentucky News. This issue contains articles:

  • Walls, Gary. Pollution to Get Full Airing During Environmental Teach-In
  • Smith, Don. Nine-Piece Puzzle Booked for April 25 – Blood, Sweat & Tears
  • Walls, Gary. Thoughts Turn Toward South as Awaited Break Approaches
  • New Body to Rest – College Heights Herald, IBM Computer
  • Hightower, Paul. Legislators Feel Independence During Session
  • Folk Festival to Return April 16
  • Applications Being Taken for Administrative Interns
  • Libraries Set Vacation Hours
  • Campus Mail Guidelines Need to Be Clarified
  • Dowd, Jim. Abhors Military Recruiters
  • Yell Leading Program Needs Re-Examination
  • Hawkinson, Kristi. …


Overgrazing And Wind Erosion, J R H Riches Jan 1969

Overgrazing And Wind Erosion, J R H Riches

Journal of the Department of Agriculture, Western Australia, Series 4

OVER the last few years wind erosion during the autumn in the wheatbelt districts has become increasingly evident.

This has occurred under normal seasonal conditions and observations in this article are not related to unusual conditions such as the extremely low rainfall during the current season.*


Pasture : Corner-Stone Of Soil Conservation, W J. Burdass Jan 1969

Pasture : Corner-Stone Of Soil Conservation, W J. Burdass

Journal of the Department of Agriculture, Western Australia, Series 4

LEGUME PASTURE is the basis of prosperity in farming in the agricultural areas of Western Australia.

The livestock industry could not thrive without it and it also maintains fertility and soil structure for the cereal growing industry.

It is, in fact, the comer-stone on which the soil conservation conscious farmer rests his soil management.


West Midlands Development : Farm Planning, G W. Spencer Jan 1968

West Midlands Development : Farm Planning, G W. Spencer

Journal of the Department of Agriculture, Western Australia, Series 4

FARM planning relates to the development and sub-division of a property in such a way that it is possible to obtain the safest, most efficient, and most practical use of every acre of land.


The Ord River Regeneration Project. 2. Dealing With The Problem, K Fitzgerald Jan 1968

The Ord River Regeneration Project. 2. Dealing With The Problem, K Fitzgerald

Journal of the Department of Agriculture, Western Australia, Series 4

THE PROGRAMME of protective and remedial work being undertaken in the Ord River catchment area had as its major objective the re-establishment of perennial vegetation, as a means of controlling erosion and reducing the silt load of the rivers. It is now in its seventh year of operation.


Multiple Cropping Will Increase The Erosion Hazard, W J. Burdass Jan 1968

Multiple Cropping Will Increase The Erosion Hazard, W J. Burdass

Journal of the Department of Agriculture, Western Australia, Series 4

WITH the low price of wool and the price of wheat high in comparison, farmers need little encouragement to increase their acreage of crops.

Unfortunately with increased cropping comes the risk of increased erosion—unless there is a simultaneous increase in the use of conservation practices.


Development Of Water Quality Criteria For Aquatic Life, Clarence M. Tarzwell Nov 1962

Development Of Water Quality Criteria For Aquatic Life, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

It is now recognized that water pollution is an important problem, that it becomes more widespread and serious as population and industry expand, and that something must be done if aquatic life resource are to be saved and their productivity maintained. In the past there has been a great deal of uncertainty in approaching this situation and a general lack of understanding of the details and ramification of the overall problem. In the efforts for the abatement of pollution, only a few clearcut objectives have been established. Knowledge is lacking as to what the objectives should be. There is still …


Interbasin Movement Of Ground Water At The Nevada Test Site, Isaac J. Winograd Mar 1962

Interbasin Movement Of Ground Water At The Nevada Test Site, Isaac J. Winograd

Publications (WR)

The present paper presents hydraulic evidence for the interbasin circulation of ground water through carbonate rocks of Paleozoic age at the Nevada Test Site. An integral part of this evidence is the discovery that aquifers in alluvium and tuff, formerly thought to be the principal aquifers at the Test Site, are semiperched above a thick tuffaceous aquiclude that separates them from the carbonate rocks.

This paper is based on one of the studies being made by the Geological
/="/">Survey for the Atomic Energy Commission. These studies seek to evaluate
/="/">the risk that may arise if ground water should …


Stilling Coastal Sand Drifts With Marram Grass, J L. Mcmullan Jan 1962

Stilling Coastal Sand Drifts With Marram Grass, J L. Mcmullan

Journal of the Department of Agriculture, Western Australia, Series 4

DRIFTS in dunes on the coast between Albany and Geraldton may be stabilised by planting marram grass (Ammophila arenaria).

However, it should be anticipated that much of the planted grass will die before an area is finally stabilised.


Light Lands In Western Australia. 2. Their Nature, Distribution And Climate, George Henry Burvill Jan 1962

Light Lands In Western Australia. 2. Their Nature, Distribution And Climate, George Henry Burvill

Journal of the Department of Agriculture, Western Australia, Series 4

LIGHT land development for agriculture is a major feature in the story of agriculture in Western Australia. Sixty years ago there was less than one million acres of arable land.

The total area planted to all crops was less than 250 thousand acres and the wheat harvest was less than one million bushels.


Flooding Of Salt Land, C V. Malcolm Jan 1961

Flooding Of Salt Land, C V. Malcolm

Journal of the Department of Agriculture, Western Australia, Series 4

Many farmers have expressed concern and some have gone to considerable expense in trying to alleviate flooding problems on salt affected land.

Some consideration will be given here to flooding, its causes, effects on salt encroachment, methods of prevention and alleviation.


Fallowing And Soil Conservation, J E. Watson Jan 1961

Fallowing And Soil Conservation, J E. Watson

Journal of the Department of Agriculture, Western Australia, Series 4

Soil Conservationists don't always disapprove of fallowing, says Soil Conservation Service adviser J. E. Watson.

They are prepared to compromise, and accept fallowing as a useful practice where it means better pasture establishment or more effective land reclamation.


Reclaiming Salt Land With Bluebush, Stanley Thomas Smith Jan 1960

Reclaiming Salt Land With Bluebush, Stanley Thomas Smith

Journal of the Department of Agriculture, Western Australia, Series 4

IN Western Australia there are approximately a million acres of salt land, some of which is a serious economic problem to individual farmers, unfortunate enough to have the major portion of their properties affected by salt encroachment.


Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell Sep 1957

Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Waste effluents from many industries are toxic to fish and other aquatic life. The control or treatment of these wastes for safe release into receiving waters presents a problem of consider able magnitude.

Much effort has been expended by some industries to solve this problem, primarily through chemical analysis for possible toxic components and then generally by a search of the literature to find out how toxic a particular component may be. Unfortunately, this approach has not been successful, nor can it be expected to be productive of satisfactory answers.


Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell Jul 1956

Stream Pollution- Aquatic Macro-Invertebrate Communities As Indicators Of Organic Pollution In Lytle Creek, Arden R. Gaufin, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Year-round field studies of the com position and ecology of stream communities associated with the purification of organic wastes in streams were initiated on Lytle Creek in October, 1949. This creek, which is located about 45 miles northeast of Cincinnati, Ohio, is a tributary of the Little Miami River. Its drainage basin comprises 27 sq. mi., a third of which is contained within the city limits of Wilmington, Ohio, a city of some 7,412 persons