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Articles 36781 - 36810 of 39839
Full-Text Articles in Physical Sciences and Mathematics
The San Joaquin–Sacramento Delta, David R. Beringer
The San Joaquin–Sacramento Delta, David R. Beringer
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
20 pages.
Contains 2 pages of references.
Public Land Livestock Grazing, Water Quality And Riparian Ecosystems: The Evolving Legal And Technical Context, Richard H. Braun
Public Land Livestock Grazing, Water Quality And Riparian Ecosystems: The Evolving Legal And Technical Context, Richard H. Braun
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
8 pages.
Contains 1 page of references.
Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon
Timber Harvesting On Private Lands: The Washington Timber– Fish–Wildlife Agreement, John P. Mcmahon
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
24 pages.
Contains 3 pages of references.
Bay/Delta Standards Memorandum And Exhibits, Thomas J. Graff
Bay/Delta Standards Memorandum And Exhibits, Thomas J. Graff
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
47 pages.
Herbivore Grazing Increases Polyphenolic Defenses In The Intertidal Brown Alga Fucus Distichus, Kathryn L. Van Alstyne Dr.
Herbivore Grazing Increases Polyphenolic Defenses In The Intertidal Brown Alga Fucus Distichus, Kathryn L. Van Alstyne Dr.
Shannon Point Marine Center Faculty Publications
Although predator-induced defenses have been reported for several species of terrestrial vascular plants, they have not been previously described in aquatic or nonvascular plants. In this study, field manipulations were used to demonstrate the presence of inducible chemical defense production in the intertidal brown alga Fucus distich us. When experimentally damaged, Fucus increased its concentrations of polyphenolic compounds by ≈20% over uninjured control plants within 2 wk. These increases occurred in the area where the plant was injured and within adjacent undamaged branches. The increase in concentrations of polyphenolic compounds in clipped plants in these experiments corresponded well with differences …
Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation
Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation
Publications (WR)
A pumped storage system consists of an upper reservoir and lower reservoir separated by an elevation difference. During low demand energy periods such as nights and weekends water is pumped from the lower to the upper reservoir using available energy from conventional steam electric power plants. During high energy demand periods, such as mornings and afternoons of weekdays, upper reservoir water is allowed to drop back down through the same system of water conduits and turbines, generating electricity to conveniently meet abrupt electrical energy requirements. The same water turbines thus act both as pumps and as conventional hydroelectric turbines.
Because …
The Prairie Naturalist Volume 20, No. 2. June 1988
The Prairie Naturalist Volume 20, No. 2. June 1988
The Prairie Naturalist
THE PRAIRIE NATURALIST
Volume 20, No. 2. June 1988
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
PRAIRIES AND GRASSLANDS OF THE ST. CROIX NATIONAL SCENIC RIVERWAY, WISCONSIN AND MINNESOTA ▪ D. C. Glenn-Lewin and J. M. Ver Hoef
SEED RAIN ON A NEBRASKA SAND HILLS PRAIRIE ▪ M. A. Potvin
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1987 ▪ R. N. Randall
SOUTH DAKOTA RECORDS OF PYGMY AND ARCTIC SHREWS: RESPONSE TO FIRE ▪ M. J. Gruebele and A. A. Steuter
FEEDING ECOLOGY OF THE PLAINS POCKET GOPHER IN …
A Practitioner’S Perspective On Section 404 Permitting—Or—How To Survive The Daze From The Hazy Maze, Marcia M. Hughes
A Practitioner’S Perspective On Section 404 Permitting—Or—How To Survive The Daze From The Hazy Maze, Marcia M. Hughes
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
17 pages.
Contains footnotes and references.
Microbial Food Resources Of The Macrofaunal-Deposit Feeder Ptychodera Bahamensis (Hemichordata: Enteropneusta), Fred C. Dobbs, James B. Guckert
Microbial Food Resources Of The Macrofaunal-Deposit Feeder Ptychodera Bahamensis (Hemichordata: Enteropneusta), Fred C. Dobbs, James B. Guckert
OES Faculty Publications
Biochemical and traditional analyses were used to characterize the microbial food resources and digestive efficiency of Ptychodera bahamensis, an enteropneust hemichordate. Sediment was collected from freshly extruded fecal casts and adjacent feeding depressions. There were no significant differences between casts and depressions in median grain size, percent silt-clay, density of total meiofauna and of nematodes, and concentrations of chlorophyll a and phaeophytin. Nematodes in casts had a median diameter greater than those in depressions. Measures of total, viable microbial biomass were 30% (total phospholipid, ester-linked fatty acids) and 49% (extractible phospholipid phosphate) lower in casts. Concentrations of 33 fatty …
Agenda: Water Quality Control: Integrating Beneficial Use And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Water Quality Control: Integrating Beneficial Use And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center
Water Quality Control: Integrating Beneficial Use and Environmental Protection (Summer Conference, June 1-3)
Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell and Charles F. Wilkinson.
Protecting water quality is essential to preserve the many beneficial uses of western water resources. This conference addresses the dominant federal requirements in the Clean Water Act, including the important major revisions enacted by Congress in 1987, with special attention to western problems regarding nonpoint source pollution. Developments in groundwater quality regulation are considered, as are selected issues concerning the implications of state and federal water quality regulation for the traditional exercise of water rights.
Decreased Triiodothyronine Binding To The Hepatic Nuclear Thyroid Hormone Receptor In The Diabetic Mouse, Thomas J. Dewind
Decreased Triiodothyronine Binding To The Hepatic Nuclear Thyroid Hormone Receptor In The Diabetic Mouse, Thomas J. Dewind
Loma Linda University Electronic Theses, Dissertations & Projects
The diabetic C57BL/KsJ-db m mouse has abnormal thyroid hormone levels and indications of thyroid hormone resistance. To investigate the basis of these abnormalities, the hepatic nuclear thyroid hormone receptor was extracted with 0.4 M KCl, 1.1 mM MgCl2, 20 mM Tris/HCl, pH 7.9 from hepatocyte nuclei of normal C57BL/KsJ, heterozygous C57BL/KsJ-db m (db/m), and diabetic C57BL/KsJ-db m (db/db) mice. Normal and heterozygous mice were grouped together as the controls. Triiodothyronine (T3) binding studies at 4°C using nitrocellulose filtration to separate free T3 from receptor bound T3 demonstrated an …
Callianassa Trilobata (Crustacea: Thalassinidea) Influences Abundance Of Meiofauna And Biomass, Composition, And Physiologic State Of Microbial Communities Within Its Burrow, Fred C. Dobbs, James B. Guckert
Callianassa Trilobata (Crustacea: Thalassinidea) Influences Abundance Of Meiofauna And Biomass, Composition, And Physiologic State Of Microbial Communities Within Its Burrow, Fred C. Dobbs, James B. Guckert
OES Faculty Publications
Biochemical and traditional methods were used to determine the influence of Callianassa trilobata on microbiological and meiofaunal communities within its large, highly consolidated burrow. Sediment was collected from the lining of the shrimp's burrow, the burrow matrix, and ambient, subsurface sediment. The lining and matrix were composed of poorly sorted, fine-grained material compared to sandy ambient sediment. Meiofauna, predominantly nematodes, were most abundant in ambient sediment, not in the burrow as has been found for other species of macrofauna. Concentrations of chlorophyll a were very high in the lining, consistent with the suggestion that C. trilobata lines its burrow walls …
The Occurrence Of Fish Remains In Modern Lake Systems : A Test Of The Stratified-Lake Mode, Douglas R. Britton
The Occurrence Of Fish Remains In Modern Lake Systems : A Test Of The Stratified-Lake Mode, Douglas R. Britton
Loma Linda University Electronic Theses, Dissertations & Projects
Theories regarding the taphonomy of fishes in lacustrine environments have traditionally relied on an anoxic water column to explain the excellent preservation. This concept has never been directly tested in modern lacustrine environments that are thought to be analogous to the lacustrine environments predicted by the Stratified-lake Model. This research tested that model by searching for fish remains in 38 collected bottom samples of six modern lacustrine analogues, including Fayetteville Green Lake, New York. The bottom sediments of a warm, holomictic, shallow, and saline lake (Salton Sea, California) were also examined. Although laminated sediments were found in all of the …
Patterns Of Sulfur Deposition In The Wood Of Pinus Echinatia Mill. From The Cumberland Plateau In Kentucky, Darrell Ray
Patterns Of Sulfur Deposition In The Wood Of Pinus Echinatia Mill. From The Cumberland Plateau In Kentucky, Darrell Ray
Masters Theses & Specialist Projects
Air pollution and acid precipitation have long had an influence on plant and animal life. In this study, the level of sulfur in the stem tissue of Pinus echinata Mill. was measured in trees from various sites along the western edge of the Cumberland Plateau to determine the presence and pattern of sulfur deposition in this species. Overall, a 40.28% increase in sulfur levels was observed from four sites along the plateau with levels increasing from 0.072 mgS/gdwt in the 1962-66 growth increment to 0.101 mg in the 1982-86 increment. According to a computer generated analysis of variance, the differences …
A New Hazardous Waste Treatment Technology Utilizing Low Power Density Microwave Energy, Gabriele Else Windgasse
A New Hazardous Waste Treatment Technology Utilizing Low Power Density Microwave Energy, Gabriele Else Windgasse
Theses
Two major applications of a new hazardous waste treatment technology using low power density microwave energy have been characterized: 1) Desorption of organic materials such as: trichloro-ethylene, para-xylene, naphthalene and gasoline hydrocarbons from substrates such as: sand and granulated activated carbon was achieved by microwave induced steam distillation and the application of a new phenomenon: arcing between GAC particles when they are exposed to microwave radiation. All contaminants could be removed to 100% (non-detectable with GC and GC-MS). 2) Decomposition of organic contaminants such as: trichloro-ethylene and trichloro-ethane in arcing/heating GAC beds. A new fluidized bed reactor ("RDW-reactor", after Ray, …
Microbial Phenol Degradation Utilizing A Complete-Mix Biological Reactor : The Effects Of Dissolved Oxygen Content, Keith Kollar
Microbial Phenol Degradation Utilizing A Complete-Mix Biological Reactor : The Effects Of Dissolved Oxygen Content, Keith Kollar
Theses
Experiments were conducted using phenol as a sole carbon source in a series of completely mixed biological reactors with solids recycle (CMBR). The reactor working volume was 4 liters, and solids were recycled from 3 liter clarifiers. Dissolved oxygen concentration (DO) was varied in order to determine the impact of this important variable on system operability.
Phenol was removed at better than 99 percent efficiency during most of the runs. Filamentous growth was not observed during any run. However, bulking did occur at higher DO levels, which was the result of microbial slime production.
A Field Perspective On Groundwater Contamination, John A. Cherry
A Field Perspective On Groundwater Contamination, John A. Cherry
Maine Collection
A Field Perspective on Groundwater Contamination
Geological Society of Maine Distinguished Lecturer John Cherry, University of Waterloo, Ontario, sponsored by the Department of Geosciences, University of Southern Maine, 19th May 1988.
Contents: Lecture 1 : Contaminant Migration Processes Illustrated by Field Experiments / Lecture 2 : Behavior of Dense Non-Aqueous Phase Liquids, Illustrated by Lab Experiments and Conceptual Examples / Lecture 3 : Field Case Histories on Groundwater Contamination / Lecture 4 : Hydrogeological Concepts and Criteria for Waste Disposal / Waterloo Center for Groundwater Research Publications List
Relocation Movement In A Stalked Crinoid (Echinodermata), Charles G. Messing, M. Christine Rosesmyth, Stuart R. Mailer, John E. Miller
Relocation Movement In A Stalked Crinoid (Echinodermata), Charles G. Messing, M. Christine Rosesmyth, Stuart R. Mailer, John E. Miller
Marine & Environmental Sciences Faculty Articles
No abstract provided.
Problems And Opportunities For The Republic Of China In Regard To Distant Water Tuna Fisheries, Chih-I Sha
Problems And Opportunities For The Republic Of China In Regard To Distant Water Tuna Fisheries, Chih-I Sha
Marine Affairs Theses and Major Papers
The extension of fishery jurisdiction out to 200 miles from the baselines used to measure the territorial sea by most of the coastal states was the dominant event in global fisheries during the decade of the 1970s. In principle, under extended jurisdiction, the coastal states have the authority to eliminate economic waste and to reduce excessive fishing pressure; on the other hand, the distant water fishing states will have to curtail their fishing activities from the traditional fishing grounds off the coastal states. The Republic of China is a typical distant water fishing state, and is seriously impacted by the …
Program Abstracts, 100th Session, Iowa Academy Of Science, April 21-23, 1988, Iowa Academy Of Science
Program Abstracts, 100th Session, Iowa Academy Of Science, April 21-23, 1988, Iowa Academy Of Science
Iowa Academy of Science Documents
Presentation abstracts from the annual meeting of the Iowa Academy of Science
The Annual Meeting Of The Iowa Academy Of Science April 21-23, 1988 [Program, 100th Meeting], Iowa Academy Of Science
The Annual Meeting Of The Iowa Academy Of Science April 21-23, 1988 [Program, 100th Meeting], Iowa Academy Of Science
Iowa Academy of Science Documents
Program Contents:
Program Summary --- 5
General Session Speakers --- 9
Awards --- 13
Distinguished Fellows --- 13, 14
Distinguished Iowa Scientist --- 15
Distinguished Service --- 16
Symposia Programs --- 17
Video Film Preview --- 19
Special Meetings --- 20
Field Trip --- 20
Poster Papers --- 21
Campus Map --- Centerfold
Section Programs --- 25
Agricultural Sciences --- 26
Anthropology --- 28
Biotechnology --- 30
Botany --- 32
Chemistry, Inorganic --- 37
Chemistry, Organic --- 42
Conservation --- 44
Earth Science Teaching --- 46
Elementary Science Teaching --- 47
Engineering --- 48
Geology --- 53
Linguistics --- 58 …
The Gamut: A Journal Of Ideas And Information, No. 23, Spring 1988, Cleveland State University
The Gamut: A Journal Of Ideas And Information, No. 23, Spring 1988, Cleveland State University
The Gamut Archives
CONTENTS OF ISSUE NO. 23, SPRING, 1988
Louis T. Milic: Editorial, 2
Bearing Witness to the Best
Vincent Dowling: Interview: The Abbey Theatre-For Ireland and the World, 5
New artistic director charts ambitious course for "international Irish" drama.
Barbara Green: Machiavelli and the Problem of Evil, 17
Does Machiavellian have to mean evil?
Bruce A. Beatie: John Griswold White and His Libraries, 29
The Cleveland Public Library's unrivaled collections of chess lore, folklore, and Orientalia.
George A. Mauersberger: A Stage Set, a Bucket, a Cave, 43
Portfolio of drawings.
Samuel M. Savin: The Great …
Santa Clara Magazine, Volume 30 Number 3, Spring 1988, Santa Clara University
Santa Clara Magazine, Volume 30 Number 3, Spring 1988, Santa Clara University
Santa Clara Magazine
10 - IS MARRIAGE REALLY INDISSOLUBLE? Santa Clara's noted marriage scholar examines the sacrament of marriage from an historical perspective. By Theodore J. Mackin, S.J.
14 - MENTOR AND GADFLY In a companion piece, marriage scholar Ted Mackin, S.J., is the subject of a profile. By Katherine Ann Tanelian and Paul Hennessy
17 - ON THE ROAD WITH JESSE JACKSON An AP reporter and alumna takes us behind the scenes to learn what it's like covering , a candidate.
21 - FEATS OF CLAY Clay Barbeau '59 is one of the hottest personalities on the counseling psychology circuit today. By …
Use Of 52Cr For The Quantitative Determination Of Red Cell Volume, Claude Michael Hanbury
Use Of 52Cr For The Quantitative Determination Of Red Cell Volume, Claude Michael Hanbury
Chemistry & Biochemistry Theses & Dissertations
Chromium-52 has recently been suggested for use as a new agent to label red cells for the in vivo quantitation of red cell volume (1). In this paper, the development and validation of a routine 52cr labeling procedure is described.
The accuracy, precision, and detection limits of chromium analysis by Zeeman effect atomic absorption spectroscopy was evaluated in the concentration range of 1 - 10 ug Cr/L.
Red cell chromium uptake was evaluated as a function of time, temperature, and concentration. Red cells labeled with a 2.5 mg/L chromium solution for 30 minutes at room temperature exhibited optimal label …
Reactions Of Aqueous Chlorine In The Gastric Fluid Of The Rat, Michael Gary Nickelsen
Reactions Of Aqueous Chlorine In The Gastric Fluid Of The Rat, Michael Gary Nickelsen
Chemistry & Biochemistry Theses & Dissertations
Gastric fluid was recovered from Sprague-Dawley rats that had been fasted for 24 hr or 48 hr and administered 4 mL deionized water. The protein, carbohydrate and chloride ion content of the gastric fluid was determined.
When gastric fluid is chlorinated with radiolabeled chlorine to concentrations between 323 and 375 mg/L, analyzed by high performance chromatography followed by liquid scintillation counting, as much as 59% of the radiolabeled chlorine was associated with organic components of the gastric fluid.
Model studies with the aromatic amino acids and the protein pepsin showed the formation of chlorinated analogs. Two chlorinated amino acid derivatives …
Storminess And High Tide Beach Change, Stanwell Park, Australia 1943-1978, Edward A. Bryant
Storminess And High Tide Beach Change, Stanwell Park, Australia 1943-1978, Edward A. Bryant
Faculty of Science - Papers (Archive)
Coastal storms have been considered significant agents in transporting sediment, modifying morphology and causing recent beach erosion. Along the New South Wales coast, the concomitance of storms, warmer sea surface temperatures and poleward movement of the Hadley cell was linked to beach erosion on Stanwell Park beach between 1943 and 1978. This result was defined using an accurately constructed compilation of coastal storms and a precisely measured time series of high tide positions taken from 105 oblique photographs. The two data sets are amongst the best of their kind in the world. Indices of storm magnitude, representing cumulative significant wave …
The Prairie Naturalist Volume 20, No. 1 March 1988
The Prairie Naturalist Volume 20, No. 1 March 1988
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
WINTER FOOD HABITS OF PRAIRIE PORCUPINES IN MONTANA ▪ P. Hendricks and H. F. Allard
RABIES CONTROL BY SKUNK DEPOPULATION IN SOUTHERN ALBERTA, 1983 TO 1986 ▪ M. J. Pybus
USE OF SHELTER BY MULE DEER DURING WINTER ▪ A. K. Wood
FORAGING BEHAVIOR AND FOOD HABITS OF BURROWING OWLS IN WYOMING ▪ C. D. Thompson and S. H. Anderson
WILD TURKEY NESTING ECOLOGY IN SOUTH CENTRAL SOUTH DAKOTA ▪ T. L. Wertz and L. D. Flake
DOES THE DOWNY AMERICAN AVOCET …
Evaluating Hay Quality, William C. Templeton Jr.
Evaluating Hay Quality, William C. Templeton Jr.
Kentucky Alfalfa and Stored Forage Conference
One of the frustrations to nutritionists interested in the feeding value of roughage has been that with all their book knowledge and technical aids no dependable scheme they could devise would consistently rank forages in feeding value, while the dumb ruminant animal could unerringly detect differences in their nutritive values.
-E. W. Crampton, 1965
Alfalfa Yield, Quality And Persistence, Michael Collins
Alfalfa Yield, Quality And Persistence, Michael Collins
Kentucky Alfalfa and Stored Forage Conference
Alfalfa management in complex because it requires the simultaneous consideration of factors that affect the yield of the crop, forage quality for ruminants and the persistence of the stand. Considerable research has demonstrated the importance of agronomic factors such as soil pH, drainage and soil fertility in successful alfalfa production. Beyond soil factors and cultivar selection, selection of harvest date is one the most important management factors that influence yield, quality and stand persistence.
The Alfalfa Plant's Reaction To Grazing, Paul Deaton
The Alfalfa Plant's Reaction To Grazing, Paul Deaton
Kentucky Alfalfa and Stored Forage Conference
Will the alfalfa plan survive grazing intensively by cattle? This question is asked most frequently these days.
Let's review the parts of an alfalfa plant to begin this discussion. Those parts are: Roots, crown and top growth. Alfalfa has a tap root which is used to store nutrient reserves for survival. It's ability to store these reserves and pull from them during times of stress (drought, cutting, etc.) makes it a very hardy plant.