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Theses/Dissertations

1981

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Articles 1 - 30 of 328

Full-Text Articles in Life Sciences

Optimum Yield And The Fcma: Uneven Distribution Of Management Burden, Herrick J. Johnson Dec 1981

Optimum Yield And The Fcma: Uneven Distribution Of Management Burden, Herrick J. Johnson

Theses and Major Papers

Until the establishment of the Fishery Conservation and Management Act of 1976 (FCMA), fish outside the United States' twelve mile fishery zone were, according to international law, common property and belonged to the nation or individual that caught them. This common property law was based on the concept that fish resources were so large that no amount of fishing would interfere with the right of others to catch fish. Modern technology, however, has created equipment that enabled foreign and domestic fishermen to over-fish the resource. A reduced domestic catch led coastal fishermen to support a bill that unilaterally extended the ...


Vegetation Of Sandstone Outcrops Of The Cumberland Plateau, Bretta Elaine Perkins Dec 1981

Vegetation Of Sandstone Outcrops Of The Cumberland Plateau, Bretta Elaine Perkins

Masters Theses

Plant communities of sandstone outcrops in six research areas on the Cumberland Plateau are determined as follows. Sample plots were distributed within four subjectively delineated life form zones: (1) Lithophyte Zone (substrate is bare rock), (2) Cryptogam-Herb Zone (usually some soil; no woody plants), (3) Shrub-Herb Zone (some soil; woody plants); and (4) Tree Zone (trees predominate). Three strata were sampled within each zone as appropriate: (1) trees and saplings, (2) other vascular plants, and (3) non-vascular plants. Cover was estimated for each species within each sample plot. Samples within each stratum of each zone were then grouped into communities ...


A Microbial Reductive Conversion Of The Steffimycin Chromophore: Chemical And Mechanistic Studies On A Soluble, Nadhdependent, Nonflavin-Containing Reductase From Streptomyces Steffisburgensis, John Rollin Hofstetter Dec 1981

A Microbial Reductive Conversion Of The Steffimycin Chromophore: Chemical And Mechanistic Studies On A Soluble, Nadhdependent, Nonflavin-Containing Reductase From Streptomyces Steffisburgensis, John Rollin Hofstetter

Dissertations

An understanding of a microbial reduction of the anthracycline antibiotic, steffimycin (1) was approached from two directions. First, the NADH-dependent enzyme responsible for the reduction was purified from the Streptomyces steffisburgensis cytosol and characterized. Second, information was obtained on the reduction and oxidation of 1.

The enzyme was a single polypeptide chain, acidic, and stable in solution. It had a molecular weight of 80,000 and no prosthetic groups.

The 5-step purification process resulted in greater than 1,000-fold purification and a 9% yield of the homogenous enzyme from extracts of S. steffisburgensis cells.

The enzyme reduced 1 by a ...


The Ecology Of The Raccoon (Procyon Lotor) In Cades Coves, Great Smoky Mountains National Park, Alan Robert Rabinowitz Dec 1981

The Ecology Of The Raccoon (Procyon Lotor) In Cades Coves, Great Smoky Mountains National Park, Alan Robert Rabinowitz

Doctoral Dissertations

From September 1979 through September 1980, 288 captures of 153 raccoons were made in Cades Cove, Great Smoky Mountains National Park, Tennessee. Fourteen raccoons were equipped with radio-transmitters to monitor movements, activity patterns, and denning behavior. Measurements, blood samples, and ectoparasites were taken from all animals.

Population density was estimated to be 1 raccoon/17 ha with sex and age ratios indicating a stable population. Parturition occurred in early June with a mean litter size of 2.8 young. Average longevity of raccoons was 30 months with a maximum longevity of approximately 86 months. There were indications of increased male ...


Standardization Of The Sister Chromatid Exchange Technique In Human Lumphocytes For Mutagen And Carcinogen Testing, Kamlesh Sharma Dec 1981

Standardization Of The Sister Chromatid Exchange Technique In Human Lumphocytes For Mutagen And Carcinogen Testing, Kamlesh Sharma

Dissertations

The differential staining of chromosomes with the use of 5-bromo-2'-deoxyuridine (BUdR) was discovered in 1972. Since then, the BUdR technique has been modified and improved. It is used to study cellular kinetics; yet its most extensive use today is focused on studying sister chromatid exchange (SCE). Studies show that the frequency of SCEs increases significantly in the presence of mutagenic and carcinogenic agents. Hence, the BUdR technique (commonly referred to as the SCE technique) has been useful as a diagnostic tool to test for mutagenic anc carcinogenic agents.

Investigators have used differential staining to obtain a baseline incidence of ...


Effects Of Site Preparation On Survival And Growth Of Planted Loblolly Pine, John Gorham Dec 1981

Effects Of Site Preparation On Survival And Growth Of Planted Loblolly Pine, John Gorham

Electronic Theses and Dissertations

Effects of site preparation on survival and growth of planted loblolly pine (Pinus taeda L.) on a loblolly-shortleaf pine-hardwood forest site in East Texas are examined by determining the survival and growth of planted loblolly pine, soil chemical characteristics, and density and height of competing (non-pine) woody stems. Three replications of four site preparation treatments (control, burn, chop, KG blade) resulted in the KG bladed plots having the highest survival, height, and diameter, but the lowest nutrient levels while, also, most effectively controlling competing vegetation. This tends to indicate that the advantages in the initial survival and growth on the ...


Control Of Eating Behavior: An Evaluation Of The Effects Of Serving Less Preferred Foods Prior To The Meal On Preschoolers' Eating, Paul Joseph Smith Knight Ii Dec 1981

Control Of Eating Behavior: An Evaluation Of The Effects Of Serving Less Preferred Foods Prior To The Meal On Preschoolers' Eating, Paul Joseph Smith Knight Ii

Master's Theses

This study investigated the effects of serving less preferred foods (vegetables) prior to the noon meal on: (1) The amount of vegetables eaten. (2) The variety of different vegetables eaten. (3) The number of servings of vegetables requested by the children. A plate containing 10 grams each of six different vegetables was served under one of two conditions: (1) Alone, 10 minutes prior to the main meal. (2) With the main meal for the first 10 minutes. A third condition allowed for the children to request any one of the six vegetables as an addition to their main meal. The ...


The Paleoecology Of Carbonaceous (Algal) Material In The Middle Devonian Rockport Quarry Limestone Of The Northeastern Portion Of Michegan's Lower Peninsula, Jeffrey Dean Spruit Dec 1981

The Paleoecology Of Carbonaceous (Algal) Material In The Middle Devonian Rockport Quarry Limestone Of The Northeastern Portion Of Michegan's Lower Peninsula, Jeffrey Dean Spruit

Master's Theses

The Rockport Quarry Limestone of the Lower Traverse Group represents a sequence of laterally contemporaneous carbonate platform sediments characterized in outcrop by four facies: (l) stromatoporoid biolithite, (2) organic-mud packstone, (3) biolithite-micrite transition, and (4) micrite. In facies (l), (2) and (3) dark brown 4-micron microspheres are found grouped or singly in wispy seams of brown carbonaceous material. Three species of filamentous blue-green algae were discovered in insoluble residues of facies (l) and (2). Numerous lamellar stromatoporoids and solitary corals occur with the carbonaceous-rich sediment in facies (l). Coalescing lenses of crinoid and bryozoan debris occur with the carbonaceous sediment ...


A Study Of Habitat Preference For The Aestivation Of The Alfalfa Weevil Hyper Postica (Curculionidae: Coleoftera), Donald D. Myers Dec 1981

A Study Of Habitat Preference For The Aestivation Of The Alfalfa Weevil Hyper Postica (Curculionidae: Coleoftera), Donald D. Myers

Master's Theses

Habitat prefernce for the aestivation of Hyper postica was researched by the sampling of field borders. Sampling methods by the sampling of field borders. Sampling methods included soil and vegetative litter collection, sweeping of borders with an insect net and emergence trapping of wooded and grass habitat. Fields were swept once a week to determine if H. postica returned to the field before the winter season. The methods resulted in the following findings: Weevils do not aestivate litter. Data from sweeping indicated that weevils prefer areas that include alfalfa and grasses. Results of observations implied that there is a direct ...


Summer-Season Populations Of Epibenthic Marine Fishes In The Indian River Lagoon System, Florida, Timothy J. Mulligan Oct 1981

Summer-Season Populations Of Epibenthic Marine Fishes In The Indian River Lagoon System, Florida, Timothy J. Mulligan

Retrospective Theses and Dissertations

Epibenthic marine fish populations were sampled in order to establish quantitative base-line data for use in long term monitoring of the northern Indian River lagoon system, Florida. Fish samples were taken by trawling monthly at 8 fixed stations from June through September, 1979 and 1980. Fifty-seven fish species representing 29 families were collected. The fish community was numerically dominated by a very few species. Anchoa mitchilli alone accounted for 87% of the 105,853 individuals collected. Abundance, domin ance, and species diversity were compared among the three lagoon subdivisions, Mosquito Lagoon, Indian River, and Banana River. Greater numbers of fishes ...


Developmental Analysis Of The Tumorous-Head Eye-Antennal Disc In Drosophila Melanogaster: Fate Map And In Vivo Culture, Deborah J. Andrew Oct 1981

Developmental Analysis Of The Tumorous-Head Eye-Antennal Disc In Drosophila Melanogaster: Fate Map And In Vivo Culture, Deborah J. Andrew

Retrospective Theses and Dissertations

No abstract provided.


Movements And Feeding Ecology Of Immature Green Turtles (Chelonia Mydas) In Mosquito Lagoon, Florida, Mary T. Mendonca Oct 1981

Movements And Feeding Ecology Of Immature Green Turtles (Chelonia Mydas) In Mosquito Lagoon, Florida, Mary T. Mendonca

Retrospective Theses and Dissertations

The seasonal and diel movements of fourteen immature green turtles (Chelonia mydas) in Mosquito, Lagoon, Florida were monitored using sonic telemetry. The feeding ecology of this turtle population was also studied using dissection and stomach flushing techniques. An attempt was made to relate the movement patterns of the turtles to their feeding habits. The immature green turtles were found to make seemingly random, long distance movements (X̄km moved/day=7.79) and to remain in deeper waters (X̄depth=1.63m), apparently not feeding, when water temperatures fell below 19°C. When average water temperatures ranged between 19-25°C ...


The Gradient Effect Of Homoeotic Transformations In The Tumorous-Head Mutant Of Drosophila Melanogaster, Julia L. Cook Oct 1981

The Gradient Effect Of Homoeotic Transformations In The Tumorous-Head Mutant Of Drosophila Melanogaster, Julia L. Cook

Retrospective Theses and Dissertations

Abnormalities in the eye of tumorous-head Drosophila melanogaster were compositely mapped to their respective positions in an archetypal eye. A dorso-ventrally oriented restriction line in the posterior eye, similar to that observed by Campos-Ortega and Waitz (1978) and Baker (1978) through clonal analysis, was observed. Restrictive areas that parallel and probably coincide with hose previously disclosed by Campos-Ortega (1978) were also demonstrated in both the dorsal and ventral eye. Transformation of tumorous-head Drosophila melanogaster were examined in order to investigate region specific correlations between head structure and their homoeotic replacements. Five different tumorous-head strains were analyzed and compared for maximum ...


Compartments In The Imaginal Wing Disc Of Drosophila Melanogaster, Scott C. Fogerty Oct 1981

Compartments In The Imaginal Wing Disc Of Drosophila Melanogaster, Scott C. Fogerty

Retrospective Theses and Dissertations

No abstract provided.


The Microbial Biochemical Potential Of Two Detention-Retention Marshes In The Kissimmee River Valley Watershed, Douglas A. Winkelmann Oct 1981

The Microbial Biochemical Potential Of Two Detention-Retention Marshes In The Kissimmee River Valley Watershed, Douglas A. Winkelmann

Retrospective Theses and Dissertations

One of the major programs to abate the deterioration of water quality in the Lake Okeechobee watershed was the addition of detention-retention facilities. The microbial biochemical potential of two different detention-retention marshes in the Kissimmee River Valley were examined to determine their effectiveness to improve water quality. The kinetics of decomposition and nutrient mineralization and assimilation, as mediated by microorganisms, and the enumeration of microorganisms capable of utilizing various substrates were studied. Various communities within each marsh were studied during a 2-year period. The decomposition rates of 3 plant substrates were determined. Chitin was used as a standard for organic ...


Correlation Between Glutathione Peroxidase Activity And Selenium Concentrations In Both Plasma And Erythrocytes, Agatha Dudzai Munyanyi Oct 1981

Correlation Between Glutathione Peroxidase Activity And Selenium Concentrations In Both Plasma And Erythrocytes, Agatha Dudzai Munyanyi

Chemistry & Biochemistry Theses & Dissertations

Plasma and erythrocyte glutathione peroxidase activities and selenium concentrations were determined for 38 apparently healthy female subjects. In addition, erythrocyte lead and plasma lead and iron concentrations were determined in each subject.

Effects of age, smoking, vitamin and mineral supplementation, use of caffeinated beverages and oral contraceptives on glutathione peroxidase activity were determined and interelement relationships were investigated using the one tailed t-test and Spearman Rank Correlation Coefficients


Effect Of Catecholamines, Methylxanthines And Cyclic Nucleotides On The Morphogenesis Of Verticillium Dahliae, Buhari Anthony Oyofo Aug 1981

Effect Of Catecholamines, Methylxanthines And Cyclic Nucleotides On The Morphogenesis Of Verticillium Dahliae, Buhari Anthony Oyofo

ETD Collection for AUC Robert W. Woodruff Library

The purpose of this investigation is to study the effects of methylxanthines, catecholamines, and cyclic nucleotides on melanin synthesisand conidiation using the technique of phase contrast microscopy. Verticillium wild type (T9) strain was grown in both sucrose nitrate liquid medium and polygalacturonic acid media (SNLM and PGAM).

These media allowed rapid production of conidia and synchronous development of microsclerotia respectively. Even though caffeine has a greater effect on conidiation, both caffeine and theophylline promoted melanization. Dibutyl cyclic AMP to lesser extent inhibited conidiation, while cyclic AMP had little to no effect on conidiation. Dibutyl cyclic AMP inhibited melanin production. Cyclic ...


The Spatial Distribution Of Phytoplankton In Westhampton Lake, Richmond, Virginia, James William Newlin Aug 1981

The Spatial Distribution Of Phytoplankton In Westhampton Lake, Richmond, Virginia, James William Newlin

Master's Theses

The hypothesis is that spatial distributions of phytoplankton standing crop and photosynthetic capacity in Westhampton Lake are homogeneous was tested. Distributions were analyzed with respect to horizontal and vertical planes separately and combined. The study was divided into three time period: 1) late summer stratification, 2) early fall mixing, and 3) fall turnover, based on isothermal lines of the lake at the deepest station. Phytoplankton standing crop was measured by spectrophotometric and fluorometric methods. The photosynthetic capacity was measured flurometrically. Combined horizontal and vertical spatial distribution of standing crop was clumped for the entire lake and during each time period ...


The Effects Of Photoperiod And Melatonin Injections On The Reproductive System Of Pinealectomized Male Mice Mus Musculus, Icr Strain, John Earnest Constantine Aug 1981

The Effects Of Photoperiod And Melatonin Injections On The Reproductive System Of Pinealectomized Male Mice Mus Musculus, Icr Strain, John Earnest Constantine

Master's Theses

One hundred two male mice , Mus musculus, ICR strain, age four weeks, were obtained. Fifty-one mice were pinealectomized and 51 were sham operated. The animals were divided into three photoperiod groups: 1.5L:22.5D, 14L:10D, 24L; 0D. The mice were subcutaneously injected daily with 10 ug melatonin or control solution from post-operative day J to post-operative day 60, On post-operative day 60 representatives of each photo­ period-surgery-injection regimen were paired with females. The remaining animals were killed and several organs were removed and weighed, Melatonin injections were progonadal in pinealectomized mice and inhibitory in sham mice in several ...


Some Aspects Of Amino Acid Regulation In The Tobacco Hornworm, Manduca Sexta, J. Michael Henry Aug 1981

Some Aspects Of Amino Acid Regulation In The Tobacco Hornworm, Manduca Sexta, J. Michael Henry

Masters Theses

The nature and roles of the high free amino acid levels found in the haemolymph of insects is poorly understood. In order to elicit aspects of the regulation and metabolism of haemolymph free amino acids, we have measured the concentrations, half-lives, turnover rates and rate of incorporation into haemolymph proteins for eight amino acids in the tobacco hornworm Manduca sexta immediately prior to and throughout the larval-pupal transformation. Throughout this period the concentrations of alanine, arginine, glutamate, histidine, leucine, lysine, proline and valine each exhibited stage specific variations seemingly independent of blood volumes and levels of other amino acids. Half-lives ...


An Examination Of The Seed Rain And Seed Bank And Evidence Of Seed Exchange Between A Beech Gap And A Spruce Forest In The Great Smoky Mountains, Noel Bruce Pavlovic Aug 1981

An Examination Of The Seed Rain And Seed Bank And Evidence Of Seed Exchange Between A Beech Gap And A Spruce Forest In The Great Smoky Mountains, Noel Bruce Pavlovic

Masters Theses

The vegetation, seed rain, and seed banks were examined in a beech gap and a spruce stand in the high elevations Smoky Mountains to quantify the seed exchanges between these two plant communities. This information is of interest because these beech gaps are believed to be slowly invaded by Picea rubens along the abrupt boundary between the stands.

Five transects of seed traps were set up perpendicular to the boundary, extending into each community. Sticky and gravity traps were placed at preset intervals along the transects to collect seed rain for one year. At each seed rain sample site a ...


The Effect Of Storm Sewer Drainage On An Urban Lake, Jose Ignacio Aizpurua Aug 1981

The Effect Of Storm Sewer Drainage On An Urban Lake, Jose Ignacio Aizpurua

Master's Theses

The present study was undertaken to evaluate the impact from normal precipitation (ra in , snow) into an urbanized lake during 1978- 1980. Several stations were chosen, and various limnological parameters were investigated. Chemical analyses were used to estimate the annual load of nutrients input into the lake by the storm sewer and surface runoff. Excessive phosphorus and nitrogen loads from these sources were discharged into the lake.

Fecal coliform distribution in the lake before, during, and after several storm events was studied. In general, fecal coliform counts increased after storm events. Peak concentrations decreased markedly with distance of the station ...


A Quantitative Study Of Agglutination In Chlamydomonas Moewusii, Nancy Jane Sedita Jul 1981

A Quantitative Study Of Agglutination In Chlamydomonas Moewusii, Nancy Jane Sedita

Biology Master’s Theses

A quantitative method for the measurement of agglutination among Chlamydomonas moewusii gametes has been presented. Using this technique, it was demonstrated that gametes possess a higher Con A isoagglutinability than vegetative cells and the + mating type is more isoagglutinable by Con A in both the vegetative and gametic states than the - mating type. Pairing is inhibited by both colchicine and trypsin treatments of gametes but agglutination is not significantly inhibited. Data from preliminary experiments in which ferritin Con A was used as a marker was suggestive of the fact that colchicine may have prevented the distal clustering of Con A ...


A Role Of Zinc Deficiency In The Fetal Alcohol Syndrome, Reginald Howard Rosemond Jul 1981

A Role Of Zinc Deficiency In The Fetal Alcohol Syndrome, Reginald Howard Rosemond

ETD Collection for AUC Robert W. Woodruff Library

No abstract provided.


Selective Inhibitors Of Platelet Arachidonic Acid Metabolism: Aggregation Is Independent Of Lipoxygenase, Alvin Raye Sams Jul 1981

Selective Inhibitors Of Platelet Arachidonic Acid Metabolism: Aggregation Is Independent Of Lipoxygenase, Alvin Raye Sams

ETD Collection for AUC Robert W. Woodruff Library

The use of acetylenic acid analogues differing in chain length or position of the triple bond permitted the systematic study of structural activity relationships for both the arachidonate metabolizing enzymes (i.e., cyclooxygenase and lipoxygenase) in platelets and the relationship of the enzyme to aggregation. Analogues were found that preferentially inhibited: a) cyclooxygenase only; b) 12-lipoxygenase only (HETE); c) both the cyclooxygenase and lipoxygenase; d) neither enzyme in platelets. There was a direct correlation between the rank order of potency of the acetylenic analogues to inhibit platelet cyclooxygenase and to suppress aggregation. Certain structural features of the triynoic acetylenic analogues ...


Opportunistic Species Of Macrobenthos In A Sewage-Polluted Lagoon, And An Analysis Of The Indicator Concept, Raymond E. Grizzle Jul 1981

Opportunistic Species Of Macrobenthos In A Sewage-Polluted Lagoon, And An Analysis Of The Indicator Concept, Raymond E. Grizzle

Retrospective Theses and Dissertations

No abstract provided.


Population Structure And Reproduction In The Introduced Florida Population Of The Pike Killifish, Belonesox Belizanus (Pisces: Poeciliidae), James S. Turner Jul 1981

Population Structure And Reproduction In The Introduced Florida Population Of The Pike Killifish, Belonesox Belizanus (Pisces: Poeciliidae), James S. Turner

Retrospective Theses and Dissertations

The pike killifish, Belonesox belizanus Kner, is the largest member of the live-bearing family Poeciliidae. The species is native to Central America, and was introduced into Dade County, Florida in 1957. B. belizanus is primarily piscivorous, and has been identified as a potential ecological "problem" species for Florida due to its heavy predation on small native fishes, especially the mosquitofish (Gambusia affinis). The population structure and reproduction of the Florida population were investigated in this study from field samples and aquarium observations. The mean standard length (SL) of mature females was about 103 mm. Most females larger than 75 mm ...


Kepone Toxicity To Estuarine Microorganisms, William Richard Mahaffey Jun 1981

Kepone Toxicity To Estuarine Microorganisms, William Richard Mahaffey

Biology Master’s Theses

Synthesized chemical agents can have an unseen, and yet profound, impact on the environment in which it is used. This study investigates the effects of the insecticide Kepone (99% pure) on estuarine microbial populations and seeks to determine the mode of toxicity to pure culture isolates obtained therein. The researcher used disc agar diffusion sensitivity, plate counts, and oxygen uptake methods to collect data over a period of four months to determine the toxicity of Kepone to a variety of laboratory pure cultures of bacteria and fungi. Of the 30 isolates tested, 33% were inhibited at 3.65 μg/disc ...


A Reexamination Of Stratification Processes In Ides Cove, N.Y. With Reference To Sediment Geochemistry, George Joseph Pesacreta Jun 1981

A Reexamination Of Stratification Processes In Ides Cove, N.Y. With Reference To Sediment Geochemistry, George Joseph Pesacreta

Biology Master’s Theses

Ides Cove is a small, relatively deep, isolated body of water off Irondequoit Bay of Lake Ontario, Irondequoit, N.Y. In 1970-71, the cove was meromictic with meromixis being attributed to the heavy application of deicing salts in the cove's watershed. Application of deicing salts to roads in the Town of Irondequoit has steadily declined from 31,230 metric tons in 1970-71 to 3,981 tons in 1979-80. Salt concentrations in surface waters of the cove have decreased since 1970. Complete mixing of the water column was observed during the winter of 1979-80 suggesting the town's "sensible salt ...


The Influence Of Age, Dietary Protein, And Calorie Restriction On Serum Cholesterol And Triglycerides In The Male Rat, Gary Wayne Young Jun 1981

The Influence Of Age, Dietary Protein, And Calorie Restriction On Serum Cholesterol And Triglycerides In The Male Rat, Gary Wayne Young

Masters Theses

The effects of age, dietary protein, and caloric restriction on serum cholesterol and triglycerides were studied in l and 2 year old male Wistar rats fed ad libitum or restricted. Ad libitum animals were fed diets low (12%), medium (20%), or high (28%) in casein throughout the life cycle. Restricted animals were fed diets either low (18%), medium (30%), or high (42%) in casein. The latter groups were fed the same absolute amounts of protein but two-thirds of the calories as determined from the feed intakes of the ad libitum-fed rats. Two additional ad libitum-fed groups were fed diets increased ...