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Carbohydrate and Nitrogen Metabolism of Sphaerotilus Natans

Creator:: Robertson, James Melvin
Resource Type:: Dissertation

Effect of Endothal and certain other selective herbicides on microbial activity in six different soils

Creator:: Au, Frederick Hung Fo
Abstract:: The effect of Endothal (3, 6-endoxyhexahydrophthalic acid), sodium pentachlorophenate (Na-PCP) and TD-47 (di-N, N-dimethylcocoamine salt of Endothal) on the microbial populations, ammonification, nitrification and respiration in six different soils was investigated. It was found that Endothal at 20 and 200 ppm had no adverse effect on the microbial population, ammonification,...
Resource Type:: Dissertation
Full Text:: on microbial activity in six different soils AN ABSTRACT OF THE THESIS OF Frederick Hung Fo Au

Influence of slash burning on microbial population and activities in a Douglas-fir forest soil

Creator:: Neal, John Lloyd
Resource Type:: Masters Thesis
Full Text:: Influence of slash burning on microbial population and

Influence of interplanted and pure stands of red alder (Alnus rubra Bong.) on microbial and chemical characteristics of a coastal forest soil in the Douglas-fir region

Creator:: Chen, Chi-sin
Abstract:: Chemical and microbial analyses were made at four seasonal intervals on soil horizons under red alder, conifers, and mixed alder-conifers at the Cascade Head Experimental Forest, established in 1937 by the U. S. Forest Service near Otis, Oregon. Microbial analyses showed that although plate counts of molds and bacteria fluctuated...
Resource Type:: Dissertation
Full Text:: STANDS OF RED ALDER (ALNUS RUBRA BONG.) ON MICROBIAL AND CHEMICAL CHARACTERISTICS OF A COASTAL FOREST

Herbicide effects on Bdellovibrio bacteriovorus

Creator:: Wehr, Nancy Briggs
Abstract:: Bdellovibrio bacteriovorus is a small parasitic bacterium present in soil, mud, and aquatic habitats. Due to its lysis of Gramnegative bacteria, an important role in soil ecology has been suggested for this organism. A study of effects of herbicides upon Bdellovibrio might consequently be of considerable value. In this study...
Resource Type:: Masters Thesis
Full Text:: effects on soil microbial ecology. Herbicide Effects on Bdellovibrio bacteriovorus by Nancy Briggs

Ecological study of aquatic myxobacteria in a woodland stream

Creator:: Carlson, René Virginia
Abstract:: Most studies of bacteria in water have concerned public health; little attention has been given to organisms which are indigenous to the aquatic environment. Myxobacteria are known to occur in soil, in the marine environment, and several have been studied in relation to diseases of salmonid fishes. However, little information...
Resource Type:: Masters Thesis
Full Text:: myxobacteria in a woodland stream. As a preliminary step for studying the ecology of myxobacteria in the

Antagonistic properties of aquatic myxobacteria and pseudomonads

Creator:: Burnison, Bryan Kent
Abstract:: Certain species of the orders Myxobacterales and Pseudo-monadales are well-known antagonists. Pseudomonas fluorescens and Pseudomonas putida have been reported to produce bacteriostatic and bactericidal substances. Among the myxobacteria there are various species which are known for their ability to produce lytic enzymes and antibiotics. Organisms from both of these groups...
Resource Type:: Masters Thesis
Full Text:: . During studies on the microbial flora of experimental streams, it was found, at times, that

The non-enzymatic formation of nitric oxide from soil and clay systems

Creator:: Wullstein, L. H. (Leroy H.)
Abstract:: Prevailing concepts relating to the non-enzymatic gaseous loss of nitrite from soil are thought to be inadequate as regards to the mechanisms involved. The conventional explanation for nitric oxide formation i.e., the acid decomposition of nitrite, is held to be insufficient in substrates of only mild or slight acidity. A...
Resource Type:: Dissertation
Full Text:: microbial formation of nitrogen gas. It is suggested that a mechanism involving transition -like

Rhizosphere microfloras associated with mycorrhizae of Douglas-fir and red alder

Creator:: Neal, John Lloyd
Abstract:: The mycorrhizal rootlets of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco.) and red alder (Alnus rubra Bong.) were extensively investigated. A jet-black mycorrhiza was found to be dominant on Douglas-fir rootlets. The fungal symbiont was identified as Cenococcum graniforme (Sow.) Ferd. and Winge. Two forms of mycorrhizae predominated on root systems of...
Resource Type:: Dissertation
Full Text:: nonmycorrhizal suberized roots of both tree species were investigated. Microbial populations and the most

Enzymatic versus nonenzymatic denitrification

Creator:: Bulla, Lee A.
Abstract:: Denitrification is classically defined as the microbial reduction of nitrate and nitrite with the liberation of molecular nitrogen and, in some instances, nitrous oxide. The sequence of reactions in which nitrogen is evolved as an end-product is essentially a respiratory mechanism in which nitrate and/or nitrite replaces molecular oxygen. The...
Resource Type:: Dissertation
Full Text:: Abstract approved: W. B. Bollen Denitrification is classically defined as the microbial reduc- tion of

ScholarsArchive@OSU

Carbohydrate and Nitrogen Metabolism of Sphaerotilus Natans

Effect of Endothal and certain other selective herbicides on microbial activity in six different soils

Influence of slash burning on microbial population and activities in a Douglas-fir forest soil

Influence of interplanted and pure stands of red alder (Alnus rubra Bong.) on microbial and chemical characteristics of a coastal forest soil in the Douglas-fir region

Herbicide effects on Bdellovibrio bacteriovorus

Ecological study of aquatic myxobacteria in a woodland stream

Antagonistic properties of aquatic myxobacteria and pseudomonads

The non-enzymatic formation of nitric oxide from soil and clay systems

Rhizosphere microfloras associated with mycorrhizae of Douglas-fir and red alder

Enzymatic versus nonenzymatic denitrification

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