Index Catalog // ScholarsArchive@OSU

Effect of kraft mill effluent on structure and function of periphyton communities

Creator:: Williams, Harvey Dean
Abstract:: Raw and biologically stabilized Kraft mill effluents were introduced into laboratory artificial streams at a ratio of 15 ml per liter of water over a two year period. Effluent from the stabilization pond of a second mill was introduced at concentrations of from 5 to 40 ml per liter of...
Resource Type:: Dissertation
Full Text:: of periphyton communities AN ABSTRACT OF THE THESIS OF HARVEY DEAN WILLIAMS for the (Name of

A biosystematic study in the genus Aster, section Aster, in western North America

Creator:: Dean, Milton Lee
Abstract:: A biosystematic investigation was undertaken in 15 species and three subspecies of the genus Aster, in western North America. Previous studies had been based entirely on external morphological features, and it was believed that much could be learned about the natural affinities of the taxa by exploring their cytological and...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Milton Lee Dean for the Ph. D

Effects of substrate relief, light intensity and herbivory on the distribution and abundance of periphyton in laboratory streams

Creator:: DeNicola, Dean M.
Resource Type:: Dissertation
Full Text:: OF Dean M. DeNicola for the degree of Doctor of Philosophy in Botany and Plant Pathology presented

Laboratory studies of bacteriophagous nematodes as potential vectors of insect pathogens

Creator:: Wright, Billie Dean
Abstract:: Three species of bacteriophagous nematodes, Pristionchus lheritieri (Maupas) Paramanov, Pelodera chitwoodi (Bassen) Dougherty and Rhabditis sp. were studied to determine their potential roles as vectors of selected insect pathogens, Bacillus thuringiensis Berliner, Beauveria bassiana (Balsamo) Vuillemin, Metarrhizium anisopliae (Metchnikoff) Sorokin and a nuclear polyhedrosis virus of Trichoplusia ni Hubner. Chlorine...
Resource Type:: Dissertation
Full Text:: potential vectors of insect pathogens AN ABSTRACT OF THE THESIS OF BILLIE DEAN WRIGHT for the degree of

Light-induced absorbance changes and partial reactions of photosynthesis in mutants of Scenedesmus obliquus, strain D₃

Creator:: Pratt, Lee Herbert
Abstract:: Partial reactions of photosynthesis were examined in the wild type strain and six photosynthetic mutants (8, 11, 26, 40, 50, a') of Scenedesmus obliquus, strain D₃. A reproducible procedure for the isolation of active chloroplast fragments from Scenedesmus was developed. Several chloroplast reactions were examined, as well as two in...
Resource Type:: Dissertation
Full Text:: for the (Name) Ph. D. (Degree) in Botany (Plant Physiology) presented on August 10, 1967 (Major

Evolution and ecology of the Ceanothus-Frankia symbiosis

Creator:: Jeong, Soon-Chun
Abstract:: The evolutionary relationship between Frankia and actinorhizal plants was evaluated by reconstructing molecular phylogenetic trees from nifH, 16S rDNA, and rbcL nucleotide sequences. Subgroupings in Frankia phylogenetic trees reconstructed from nifH and from 16S rDNA sequences were consistent in terms of plant origins of Frankia strains. Although the branching order...
Resource Type:: Dissertation
Full Text:: APPROVED: Major Professor, representin ant Physiology Chair of Plant Physiology Program Dean of Graduate

Partial characterization of the P4 pathotype of pea seedborne mosaic virus

Creator:: Kohnen, Paul D.
Abstract:: Biological, serological, and molecular characteristics of the P4 pathotype of pea seedborne mosaic potyvirus (PSbMV) were investigated. The characterization allowed P4 to be differentiated from other pathotypes of the same virus. P4 was distinguished from P1 on the basis of host symptomatology. It induced varied, but often distinctive symptoms in...
Resource Type:: Dissertation
Full Text:: Plant Pathology Dean of G Date thesis is presented July 23, 1992 Typed by Paul Kohnen for Paul D

Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

Creator:: Steinman, Alan D.
Abstract:: Effects of current velocity, irradiance, and grazing on the biomass, taxonomic structure, physiognomy, and chemical composition of lotic algal assemblages were investigated. Four experiments, lasting 32 to 75 days, were conducted in laboratory streams to determine how these factors affect algal assemblages singly, and in concert with each other. Regardless...
Resource Type:: Dissertation
Full Text:: algal assemblages in laboratory streams AN ABSTRACT OF THE THESIS OF Alan D. Steinman for the degree

Seeing Genes: Multiscale Phenotyping Reveals Gene Functions in Maize Pollen

Creator:: Warman, Cedar D.
Abstract:: Plant sexual reproduction requires a broad array of molecular mechanisms to proceed successfully. Some of these mechanisms are well-studied, but our knowledge of them as a whole is fundamentally incomplete. Pollen tube growth is a key part of this process, facilitating the delivery of the sperm cells to the female...
Resource Type:: Dissertation
Full Text:: of Botany & Plant Pathology Dean of the Graduate School I understand

Overwintering of Erysiphe necator and Inoculum Monitoring for Decision Aids

Creator:: Thiessen, Lindsey D.
Abstract:: Grape powdery mildew (Erysiphe necator) causes economic damages to grape worldwide due to the cost of management and injury to berries. Each region where European grapevine (Vitis vinifera) is grown experiences a unique epidemic, and disease prediction models that are based on empirical correlations of weather data to disease fail...
Resource Type:: Dissertation
Full Text:: Lindsey D. Thiessen for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

ScholarsArchive@OSU

Effect of kraft mill effluent on structure and function of periphyton communities

A biosystematic study in the genus Aster, section Aster, in western North America

Effects of substrate relief, light intensity and herbivory on the distribution and abundance of periphyton in laboratory streams

Laboratory studies of bacteriophagous nematodes as potential vectors of insect pathogens

Light-induced absorbance changes and partial reactions of photosynthesis in mutants of Scenedesmus obliquus, strain D₃

Evolution and ecology of the Ceanothus-Frankia symbiosis

Partial characterization of the P4 pathotype of pea seedborne mosaic virus

Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

Seeing Genes: Multiscale Phenotyping Reveals Gene Functions in Maize Pollen

Overwintering of Erysiphe necator and Inoculum Monitoring for Decision Aids

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