Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 15 of 15

Full-Text Articles in Life Sciences

Radiological Monitoring Of Select Faunal Species Indigenous To Environs Of The Maxey Flats Shallow Land Burial Facility, Robert Bruce Burns Dec 1983

Radiological Monitoring Of Select Faunal Species Indigenous To Environs Of The Maxey Flats Shallow Land Burial Facility, Robert Bruce Burns

Morehead State Theses and Dissertations

A Thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Robert Bruce Burns on December 14, 1983.


Twin Raphides In The Vitaceae And Araceae And A Model For Their Growth, A. M. Cody, Harry T. Horner Sep 1983

Twin Raphides In The Vitaceae And Araceae And A Model For Their Growth, A. M. Cody, Harry T. Horner

Botany Publication and Papers

Several optical tests were employed to demonstrate twinning in raphides from 10 species in the family Vitaceae and one species in the Araceae. Scanning electron microscopy revealed that twin raphides differ from the reported shape of twin styloids and that raphides of the Vitaceae are "barbed" along two sides. A model is proposed to describe in vivo raphide production under saturated to supersaturated conditions of directional nutrient flow.


Jamaican Blue-Green Algae Collections Of J.C. Strickland, W. John Hayden Jul 1983

Jamaican Blue-Green Algae Collections Of J.C. Strickland, W. John Hayden

Biology Faculty Publications

Professor John C. Strickland (1915-1980) devoted much of his life to teaching biology, botany, and phycology at the University of Richmond. Throughout his academic career he maintained a keen interest in the Myxophyceae, or blue-green algae, studying their culture, cytology, and taxonomy (Drouet & Strickland, 1942; Strickland, 1940, 1946). Most of his collections of these and other algae were made in Virginia and are housed in the herbarium maintained by the Department of Biology, University of Richmond. However, he also made four trips to Jamaica in the years 1966-1971 before his health deteriorated to the extent that field work, and even processing of ...


Comparison Of Old Field Succession On A Tallgrass Prairie And A Nebraska Sandhills Prairie, Mary Bomberger Brown, Shelly L. Shields, A. Tyrone Harrsion, Kathleen H. Keeler Mar 1983

Comparison Of Old Field Succession On A Tallgrass Prairie And A Nebraska Sandhills Prairie, Mary Bomberger Brown, Shelly L. Shields, A. Tyrone Harrsion, Kathleen H. Keeler

Faculty Publications in the Biological Sciences

Long held to be reasonably well understood, the process of ecological succession has recently come under attack. The predictability of successional changes has been doubted (Walker 1970), the mechanism of species replacement has been questioned (Connell and Slatyer 1977), and the reality of steady-state (climax) challenged (Botkin and Sobel 1975, Connell and Slatyer 1977, Connell 1978). In particular, several communities are presently recognized as having "cyclic succession" (Ricklefs 1973), in which the process is continually repeating. Such communities include heaths (Watt 1947), prairie pot-hole marshes (Vander Valk and Davis 1978), spruce-fir forests (Sprugel 1976, Sprugel and Bormann 1981), and intertidal ...


Distribution Of Limonin During The Growth And Development Of Leaves And Branches Of Citrus Paradisi, Cecilia Mcintosh, Richard L. Mansell Feb 1983

Distribution Of Limonin During The Growth And Development Of Leaves And Branches Of Citrus Paradisi, Cecilia Mcintosh, Richard L. Mansell

Cecilia A. McIntosh

This report analyzes the distribution of limonin within a leaf, within a branch, and between branches of an individual Citrus paradisi tree.  Limonin was evenly distributed within single leaves and the concentration in the leaves on a given branch was constant, regardless of branch age.  The total amount of limonin per leaf varied with leaf size.  Not all branches within the tree exhibited the same potential for limonin metabolism as reflected in their limonin and limonoate A-ring monolactone levels.  The limonin content showed increasing levels as the leaves bud and grow and then decreasing levels as they mature and turn ...


Spring 1983 Conference Issue, Anna G. Symington, Mickey Spokas, Joseph Troll, Nancy L. Garrabrants, David K. Bell Jan 1983

Spring 1983 Conference Issue, Anna G. Symington, Mickey Spokas, Joseph Troll, Nancy L. Garrabrants, David K. Bell

Turf Bulletin

  1. Chemical Retardation of Grass Growth (page 3)
  2. Cultivar Trials - 1982 (5)
  3. Fifty-second Annual Turf Conference and Seventh Industrial Show (10)
  4. Dollar Spot Fungicide Control Trials - 1982 (13)
  5. Winter Protection of Herbaceous Perennials (14)
  6. Control of Annual Bluegrass in Golf Tees Using Perennial Ryegrass and Ethofumesate (15)


Fall 1983, Pat Lucas, Ann Reilly, J. D. Butler, C. M. Feldhake, R. H. Hurley, C. Reed Funk, Prasanta C. Bhowmik, Roy L. Goss Jan 1983

Fall 1983, Pat Lucas, Ann Reilly, J. D. Butler, C. M. Feldhake, R. H. Hurley, C. Reed Funk, Prasanta C. Bhowmik, Roy L. Goss

Turf Bulletin

  1. Canada Geese Control (page 3)
  2. Coloring the Course (5)
  3. Irrigation's Role for Turf and Landscape (7)
  4. Perennial Ryegrass Update (12)
  5. Crabgrass - A Common Troublesome Weed in Turfgrass (15)
  6. Thatch and Its Control (18)


The Effects Of Osmotically-Induced Water Stress And Stripe Smut (Ustilago Striiformis) Or Flag Smut (Urocystis Agropyri) On Kentucky Bluegrass (Poa Pratensis 'Merion') , Jeffery Lynn Nus Jan 1983

The Effects Of Osmotically-Induced Water Stress And Stripe Smut (Ustilago Striiformis) Or Flag Smut (Urocystis Agropyri) On Kentucky Bluegrass (Poa Pratensis 'Merion') , Jeffery Lynn Nus

Retrospective Theses and Dissertations

Growth, water relations, and water economy of Poa pratensis 'Merion' were studied as they were affected by infection by Ustilago striiformis or Urocystis agropyri and/or osmotically-induced water stress. Total and leaf weight of U. striiformis-infected plants growing in nutrient solution were greater than healthy plants, although increases were lost under increasing water stress. Root weight and root-shoot ratios were lower in U. striiformis-infected plants than those in healthy plants over all levels of water stress. Total, leaf, and root weights, and root-shoot ratios of U. agropyri-infected plants grown in nutrient solution decreased compared to healthy plants, and the decreases ...


Effects Of Two Species Of Va Mycorrhizal Fungi On Drought Tolerance Of Winter Wheat, Michael F. Allen, Michael G. Boosalis Jan 1983

Effects Of Two Species Of Va Mycorrhizal Fungi On Drought Tolerance Of Winter Wheat, Michael F. Allen, Michael G. Boosalis

Papers in Plant Pathology

Roots and soils from western Nebraska fields of native and planted grasslands, and winter wheat of varied fallow-wheat cultivation duration, were evaluated for vesicular-arbuscular (VA) mycorrhizal root infection and spore numbers and types. Increased cultivation decreased percentage mycorrhizal infection in wheat and reduced spore numbers of Glomus fasciculatus, the dominant VA mycorrhizal fungus in these soils. Spore numbers of other VA mycorrhizal fungi did not change significantly with cultivation although mean numbers of G. mosseae increased with continued wheat production. Water relations and growth were determined for greenhouse-grown non-mycorrhizal, G. fasciculatus-infected, and G. mosseae-infected wheat in wet and ...


Formation Of Calcium Oxalate Crystals Associated With Apothecia Of The Discomycete Dasyscypha Capitata, Harry T. Horner, Lois H. Tiffany, Anita M. Cody Jan 1983

Formation Of Calcium Oxalate Crystals Associated With Apothecia Of The Discomycete Dasyscypha Capitata, Harry T. Horner, Lois H. Tiffany, Anita M. Cody

Botany Publication and Papers

Calcium oxalate dihydrate crystals form at or near the tips of sterile hairs on the apothecia of the oak leaf litter discomycete Dasyscypha capitata. Early in their development, the crystals appear to be covered by a wall or membrane, whereas later they appear external. The crystals on each hair form a mass of crystals called a druse. Quite often the smaller crystals near the apex of the tip form a rosette, whereas the more peripheral crystals are much larger and display shapes possibly related to environmental factors. The formation and development of Dasyscypha crystals are compared with recent studies of ...


Prairie Phenology And Seed Germination, Donald E. Culwell, Robert Wright Jan 1983

Prairie Phenology And Seed Germination, Donald E. Culwell, Robert Wright

Journal of the Arkansas Academy of Science

No abstract provided.


A System Of World Mammal Faunal Regions Pt. 1. Logical And Statistical Derivation Of The Regions, Charles H. Smith Jan 1983

A System Of World Mammal Faunal Regions Pt. 1. Logical And Statistical Derivation Of The Regions, Charles H. Smith

DLPS Faculty Publications

No abstract provided.


A System Of World Mammal Faunal Regions Pt. 2.The Distance Decay Effect Upon Inter-Regional Affinities, Charles H. Smith Jan 1983

A System Of World Mammal Faunal Regions Pt. 2.The Distance Decay Effect Upon Inter-Regional Affinities, Charles H. Smith

DLPS Faculty Publications

No abstract provided.


Some Effects Of Simulated Acid Rain On Cool Season Turfgrasses, Robert C. Morrow Jan 1983

Some Effects Of Simulated Acid Rain On Cool Season Turfgrasses, Robert C. Morrow

Masters Theses

Six varieties of cool season turfgrasses were exposed to simulated acid rainfall with treatments consisting of a sulfuric acid solution, a nitric acid solution, and a 50-50 mixture of both. Each solution was used to make "acid rain" of pHs 3.0, 2.5, 2.0, and 1.5.

Height measurements showed decreases in growth throughout the experiment for all treatments except the nitric and 50-50 acid treatments at pHs of 2.0 and 1.5, which maintain fairly constant growth. Analysis of nitrate, phosphorous, and potassium levels in the soil indicated heavy leaching of the nitrates and potassium from ...


An Analysis Of The Limonin And Naringin Content Of Grapefruit Juice Samples Collected From Florida State Test Houses, Richard L. Mansell, Cecilia Mcintosh, Susan E. Vest Dec 1982

An Analysis Of The Limonin And Naringin Content Of Grapefruit Juice Samples Collected From Florida State Test Houses, Richard L. Mansell, Cecilia Mcintosh, Susan E. Vest

Cecilia A. McIntosh

An analysis of the limonin and naringin content of 6685 grapefruit juice samples (representing approximately 6% of all grapefruit harvested) collected from three Florida State Test Houses showed that there were statistically significant differences between the Test Houses.  There also was a statistically significant difference in the concentration of these compounds in the juice from the different cultivars of fruit sampled.  Average limonin and naringin concentrations in the juice remained fairly constant through the beginning of the season until a freeze occurred in early 1981.  Juice obtained from fruit harvested after this freeze contained decreasing amounts of limonin and increasing ...