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Articles 1711 - 1740 of 1876
Full-Text Articles in Physical Sciences and Mathematics
Serum Esterase, Lactate Dehydrogenase, And Tetrazolium Oxidase Polymorphisms In The Clupeidae, Walter Francis Eanes
Serum Esterase, Lactate Dehydrogenase, And Tetrazolium Oxidase Polymorphisms In The Clupeidae, Walter Francis Eanes
Dissertations, Theses, and Masters Projects
No abstract provided.
Acute Toxicity Of No 6 Fuel Oil To Intertidal Organisms In The Lower York River, Virginia, Jeffrey L. Hyland
Acute Toxicity Of No 6 Fuel Oil To Intertidal Organisms In The Lower York River, Virginia, Jeffrey L. Hyland
Dissertations, Theses, and Masters Projects
No abstract provided.
Gamma Decay Of States Excited By 300 And 600 Mev Protons On Targets Of Boron, Carbon, Nitrogen, Oxygen, Magnesium, And Calcium, Max David Holt
Gamma Decay Of States Excited By 300 And 600 Mev Protons On Targets Of Boron, Carbon, Nitrogen, Oxygen, Magnesium, And Calcium, Max David Holt
Dissertations, Theses, and Masters Projects
No abstract provided.
Distribution, Growth, Selective Feeding, And Energy Transformations Of Young-Of-The-Year Blueback Herring, Alosa Aestivalis (Mitchill), In The James River, Virginia, Richard Greig Burbidge
Distribution, Growth, Selective Feeding, And Energy Transformations Of Young-Of-The-Year Blueback Herring, Alosa Aestivalis (Mitchill), In The James River, Virginia, Richard Greig Burbidge
Dissertations, Theses, and Masters Projects
Energy transformations and budget are computers for young-of-the-year blueback herring, Alosa aestivalis, in the James River, Virginia. Distribution, growth, and selective feeding are described. Fish and zooplankton collections were made at five stations in the main channel of the James RIver from June through November 1969. Two 24hr series of samples were collected in July and October 1968 in the Potomac River. A direct relationship existed between standing cropos of zooplankton and distribution, growth, and feeding of blueback herring. Zooplankton densities were highest upstream, where food consumption and growth rates were correspondingly highest. A progressive downstream decrease and upstream increase …
Acute Toxicity Of Unbleached Kraft Mill Effluent (Ukme) To The Oppossum Shrimp, Neomysis Americana Smith, Fred Jacobs
Acute Toxicity Of Unbleached Kraft Mill Effluent (Ukme) To The Oppossum Shrimp, Neomysis Americana Smith, Fred Jacobs
Dissertations, Theses, and Masters Projects
96-hour TL50 values of unbleached kraft mill effluent (UKME) for Neornysis arnericana were found to range from concentrations of 3.29 to 6.85% at 26-28 C and 3.90 to 7.30% at 16-18 C. Differences between batches of effluent proved insignificant in experiments at each temperature regime. Furthermore, UKME did not lose its toxicity, when stored for 5 to 7 days at 4 C. A concentration of 20% effluent killed 100% of the organisms in 8 of the 12 bioassays. Slope functions and confidence limits of TL50 were calculated. This dissertation is from the Joint Program Degree from the College of William …
The Reproductive Cycle And Larval Tolerances Of Rangia Cuneata In The James River, Virginia, Thomas David Cain
The Reproductive Cycle And Larval Tolerances Of Rangia Cuneata In The James River, Virginia, Thomas David Cain
Dissertations, Theses, and Masters Projects
The autecology of the brackish water clam Rangia cuneata was investigated in the James River, Virginia, from February 1970 to January 1972. The reproductive cycle, combined salinity and temperature effects on embryos and larvae, and setting were studied. Histological slides were made, set collected, and temperature and salinity measurements taken from three populations living in different salinity regimes. Phases of gonad development are described. Gametogenesis started in April and from May through September clams were found in all gonadal phases. Ripe gonads were found from May to late November with no summer or inactive period. It was determined by the …
Nmr Studies Of Ammonium Dihydrogen Arsenate And High Temperature Transitions In The Potassium Dihydrogen Phosphate Group, John Young Nicholson
Nmr Studies Of Ammonium Dihydrogen Arsenate And High Temperature Transitions In The Potassium Dihydrogen Phosphate Group, John Young Nicholson
Dissertations, Theses, and Masters Projects
No abstract provided.
Low Energy Studies Of The Experimental Elastic Differential Cross-Sections For The Systems Proton-Helium, Proton-Neon And Signly Ionized Helium-Helium, William Guy Rich
Low Energy Studies Of The Experimental Elastic Differential Cross-Sections For The Systems Proton-Helium, Proton-Neon And Signly Ionized Helium-Helium, William Guy Rich
Dissertations, Theses, and Masters Projects
No abstract provided.
The Long-Term Model Of Salinity Intrusion Into The Estuarine Rivers, Mary Ann Terese Orzech
The Long-Term Model Of Salinity Intrusion Into The Estuarine Rivers, Mary Ann Terese Orzech
Dissertations, Theses, and Masters Projects
No abstract provided.
Benthic Fish Associations On The Continental Slope Of The Middle Atlantic Bight, Douglas F. Markle
Benthic Fish Associations On The Continental Slope Of The Middle Atlantic Bight, Douglas F. Markle
Dissertations, Theses, and Masters Projects
No abstract provided.
A Comparison Of The Chlorinated Hydrocarbon Content Of Surface And Subsurface Samples In The York River, Virginia, James L. Lake
A Comparison Of The Chlorinated Hydrocarbon Content Of Surface And Subsurface Samples In The York River, Virginia, James L. Lake
Dissertations, Theses, and Masters Projects
No abstract provided.
Iodine Metabolism In Sessile Stages Of Chesapeake Bay Semaeostome Jellyfish, Janet Evelyn Olmon
Iodine Metabolism In Sessile Stages Of Chesapeake Bay Semaeostome Jellyfish, Janet Evelyn Olmon
Dissertations, Theses, and Masters Projects
No abstract provided.
An Investigation Of One And Two State Molecular Systems Based On The Results Of Elastic Differential Scattering Experiments, Stephen Michael Bobbio
An Investigation Of One And Two State Molecular Systems Based On The Results Of Elastic Differential Scattering Experiments, Stephen Michael Bobbio
Dissertations, Theses, and Masters Projects
No abstract provided.
Reactions Of Trichloro(Beta-Diketonato)Titanium(Iv) Complexes With Alcohols In The Presence Of Pyridine, William R. C. Munsey
Reactions Of Trichloro(Beta-Diketonato)Titanium(Iv) Complexes With Alcohols In The Presence Of Pyridine, William R. C. Munsey
Dissertations, Theses, and Masters Projects
No abstract provided.
Vertical Distribution Of Estuarine Phytoplankton In The Surface Microlayer And At One Meter, And Fluctuations In Abundance Caused By Surface Adsorption Of Monomolecular Films, Victoria R. Gibson
Vertical Distribution Of Estuarine Phytoplankton In The Surface Microlayer And At One Meter, And Fluctuations In Abundance Caused By Surface Adsorption Of Monomolecular Films, Victoria R. Gibson
Dissertations, Theses, and Masters Projects
A quantitative comparison of the phytoplankton in the surface microlayer of an estuary and that a depth of one meter was made using a Garrett-type screen and a Frautschy bottle for sample collection. Results showed that the surface microlayer contained a significantly greater number of phytoplankton cells than the water at one meter. Species diversity at the surface tended to be somewhat lower than one meter, due to a greater number of individuals of the dominant species. Investigation revealed that the presence of a monomolecular film of slick material absorbed onto the water surface resulted in a decrease in the …
Analysis Of Morone Saxatilis And Morone Americanus Spawning And Nursery Area In The York-Pamunkey River, Virginia, Ronald Gilbert Rinaldo
Analysis Of Morone Saxatilis And Morone Americanus Spawning And Nursery Area In The York-Pamunkey River, Virginia, Ronald Gilbert Rinaldo
Dissertations, Theses, and Masters Projects
No abstract provided.
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Dissertations, Theses, and Masters Projects
No abstract provided.
Reactions Of The Tin Tetrahalides With 2,4-Pentanedione In The Presence Of Organic Amines, Kwai-Sam Wong
Reactions Of The Tin Tetrahalides With 2,4-Pentanedione In The Presence Of Organic Amines, Kwai-Sam Wong
Dissertations, Theses, and Masters Projects
No abstract provided.
Population Dynamics Of Ospreys In Tidewater Virginia, Robert Senior Kennedy
Population Dynamics Of Ospreys In Tidewater Virginia, Robert Senior Kennedy
Dissertations, Theses, and Masters Projects
No abstract provided.
The Solvolysis Of Triaryhaloallenes, Henry Wayne Moran
The Solvolysis Of Triaryhaloallenes, Henry Wayne Moran
Dissertations, Theses, and Masters Projects
No abstract provided.
The Mechanism Of Solvolysis Of Tri-Tert-Butylchloroallene, Whitney Ann Boynton
The Mechanism Of Solvolysis Of Tri-Tert-Butylchloroallene, Whitney Ann Boynton
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Thermal Shock On Larvae Of The Oyster, Crassostrea Virginica (Gmelin), Robert J. Diaz
Effects Of Thermal Shock On Larvae Of The Oyster, Crassostrea Virginica (Gmelin), Robert J. Diaz
Dissertations, Theses, and Masters Projects
Larvae of the American oyster Crassostrea virginica (Gmelin) were subjected to thermal shocks of varying magnitude at different larval ages. The effects were assessed in terms of mortality, growth, and setting success. Growth of larvae acclimated at 25 C and 20% salinity was not affected by a thermal shock of 10 C or 15 C, but a 20 C thermal shock had detrimental effect on growth. Mortality of oyster larvae increased significantly following thermal chocks of 10, 15, and 20 C, and was higher for older than for younger larvae. Setting rates of the control and 10 C shocked larvae …
The Feeding Of Cornstarch To Clams And Mussels, Kathleen Rapier Harleston
The Feeding Of Cornstarch To Clams And Mussels, Kathleen Rapier Harleston
Dissertations, Theses, and Masters Projects
Three concentrations of cornstarch, 0 . 6 ppm, l.l ppm, 4.0 ppm, were fed to clams and mussels during the spring, summer, and fall of 1970 . Parameters measured were shell length, shell thickness, total weight, wet meat weight, and percentage glycogen based on wet meat weight. Starch had no effect on size parameters but did influence glycogen content of meats . Mussels showed an increase of glycogen in all three seasons . Clams showed an increase only in the fall. This dissertation is from the Joint Program Degree from the College of William & Mary and University of Virginia …
An Investigation Of The Temperature Dependence Of The Electrical Resistivity Of Concentrated Strong-Scattering Alloys, An-Ban. Chen
An Investigation Of The Temperature Dependence Of The Electrical Resistivity Of Concentrated Strong-Scattering Alloys, An-Ban. Chen
Dissertations, Theses, and Masters Projects
No abstract provided.
A Study Of The Exotic Game Bird Introduction Program In The Sandy Point Area Of Virginia 1970-1971, Hans Wachtmeister
A Study Of The Exotic Game Bird Introduction Program In The Sandy Point Area Of Virginia 1970-1971, Hans Wachtmeister
Dissertations, Theses, and Masters Projects
No abstract provided.
The Effects Of Thermal Shock And Chlorine On The Estuarine Copepod Acartia Tonsa, David Michael Dressel
The Effects Of Thermal Shock And Chlorine On The Estuarine Copepod Acartia Tonsa, David Michael Dressel
Dissertations, Theses, and Masters Projects
Acute bioassays were conducted to determine the effects of thermal shock and chlorine exposure on the estuarine copepod Acartia tonsa. Laboratory conditions simulated power plant conditions using 8 C elevated temperatures and slug chlorination. A factorial design having temperatures at two levels and multiple chlorine additions, showed isolated effects of temperature and chlorine and their interaction. Adult Acartia tonsa withstood thermal shocks of 8 C above ambient summer temperatures of 20 to 25 C. No adverse effects were noted after 96 hours following an 8 ⃤ T over 5 seconds, holding at the elevated temperature for 5 minutes, and slowly …
Age, Growth, And Mortality Of The White Perch, Morone Americana (Gmelin), In The James And York Rivers, Virginia, Richard Alan St. Pierre
Age, Growth, And Mortality Of The White Perch, Morone Americana (Gmelin), In The James And York Rivers, Virginia, Richard Alan St. Pierre
Dissertations, Theses, and Masters Projects
More than 750 white perch, Morone americana, were collected from each of two major tributaries of southern Chesapeake Bay to compare the age structures, growth rates, and mortality rates of the two populations.The James River is characterized by heavy domestic and industrial pollution, whereas the York River is only slightly polluted. Maximum ages determined by scale analysis were 7 and 10 years for males and females respectively in each river. Males and females from the James River were larger than those from the York up to ages IV and V, respectively. Older fish were larger in the York . Females …
Numerical Modeling Investigation Of Cyclonic Gulf Stream Eddies, Robert Lee Pickett
Numerical Modeling Investigation Of Cyclonic Gulf Stream Eddies, Robert Lee Pickett
Dissertations, Theses, and Masters Projects
No abstract provided.
The Role Of An Anadromous Fish, The Alewife, Alosa Pseudoharengus (Wilson), In Pesticide Transport, Thomas A. Barnard
The Role Of An Anadromous Fish, The Alewife, Alosa Pseudoharengus (Wilson), In Pesticide Transport, Thomas A. Barnard
Dissertations, Theses, and Masters Projects
No abstract provided.
Benthic Macroinvertebrate Communities As Indicators Of Pollution In The Elizabeth River, Hampton Roads, Virginia, Michael Donald Richardson
Benthic Macroinvertebrate Communities As Indicators Of Pollution In The Elizabeth River, Hampton Roads, Virginia, Michael Donald Richardson
Dissertations, Theses, and Masters Projects
No abstract provided.