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Measurement of nitrogenase activity of intact legume symbionts in situ using the acetylene reduction assay

Creator:: Fishbeck, Kathleen Ann
Abstract:: The process of biological nitrogen fixation involves the enzymic reduction of atmospheric nitrogen (N₂) to ammonia (NH₃). The enzyme which catalyzes this reduction, nitrogenase, does not exhibit a high degree of substrate specificity. It also catalyzes the reduction of acetylene (C₂2H₂) to ethylene (C₂H₄). The reduction of C₂H₂ to C₂H₄...
Resource Type:: Masters Thesis
Full Text:: . I also wish to thank Dr. W. D. Loomis for serving as a member of my graduate committee. I extend

Influence of the secondary metabolites of Mentha piperita L. on Tetranychus urticae Koch

Creator:: Larson, Katherine Cole
Resource Type:: Masters Thesis
Full Text:: mainstem 0 acc i-- °lower lateralY 00 8 0 I-- oz o1 o (.9 D 60-1 04 o oo u) w Et o 0n <.-, 40 o o2 1 0

Comparative gibberellin relationships in tall and dwarf peas (Pisum sativum L.)

Creator:: Anderson, James David
Abstract:: Experiments were performed to determine whether a direct correlation exists between the growth rates of tall and dwarf peas grown either in the light or in the dark and endogenous gibberellin (GA) content. Three separate but related experimental approaches were utilized: (1) the determination of possible qualitative and /or quantitative...
Resource Type:: Dissertation
Full Text:: . Appreciation is also expressed to Drs. N. I. Bishop, W. D. Loomis and A. W. Anderson for serving on my

Translocation of photosynthates in soybeans (Glycine Max. (L) Merr. cv. Wilkin) as affected by soil water potential and soil temperature

Creator:: Ekasingh, Methi
Resource Type:: Dissertation
Full Text:: . Christensen, R. G. Petersen, W. D. Loomis, and W. W. Chilcote, my graduate committee. I wish to thank Dr. D

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

Creator:: Chichester, Frederick Wesley
Abstract:: A sequence of soil profiles was sampled along a climate-vegetation transect on the dated Mazama pumice fall in central Oregon. The <2 μ size fraction from each sample was characterized with respect to the relative significance of amorphous and crystalline components, and the individual minerals of the latter group were...
Resource Type:: Dissertation
Full Text:: investigation, and to Drs. H. J. Evans and W. D. Loomis in recognition of their willingness to serve as

The effects of enhanced atmospheric CO₂ and N fertilization on growth and development of rice (Oryza sativa L.)

Creator:: Weerakoon, W. M. Wijayasiri
Resource Type:: Dissertation
Full Text:: for their advice, time and interest throughout my graduate study. I wish to thank, Dr. D. Senadhira

The glutamine synthetases in soybean root nodules and free-living Rhizobium japonicum

Creator:: Guevara, Juan Garcia
Abstract:: Glutamine synthetase activity is present in both the cytosol and bacteroid fractions of soybean root nodules. Total activity measurements indicate that at least 90% of the activity in nodules is located in the cytosol. Results reported by McParland, et al. (29), showed that many properties of glutamine synthetase from nodule...
Resource Type:: Dissertation
Full Text:: thank Drs. R. S. Quatrano, D. J. Armstrong, W. D. Loomis and D. Richardson for serving as members of

Selectivity and chemodynamics of 3,5-dibromo-4-hydroxybenzonitrile in winter wheat (Triticum aestivum L.) and coast fiddleneck (Amsinckia intermedia Fisch. & Mey)

Creator:: Schafer, David Eugene
Abstract:: Controlled environment chamber and laboratory studies were carried out to evaluate selectivity and chemodynamics of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) in winter wheat (Triticum aestivum L.) 'Nugaines', a tolerant species, and coast fiddleneck (Amsinckia intermedia Fisch. & Mey), a susceptible species. A comparison of ED₅₀ values, based upon reduction of whole plant growth,...
Resource Type:: Dissertation
Full Text:: constructive criticism rendered during the preparation of the manuscript. Drs. A. P. Appleby, W. D. Loomis

Malate and tartrate in Oregon grapes

Creator:: Norton, Kerry M.
Abstract:: In western Oregon the titratable acidity of grapes at harvest may in some seasons be higher than desirable for making quality wine, due to the retention of malic acid. The purposes of this study were 1) to investigate the effects of a vineyard cultural practice, cluster exposure at veraison by...
Resource Type:: Masters Thesis
Full Text:: below the clusters, or d) left untreated as a control. Clusters of White Riesling were exposed to the

The influence of mold contamination, processing and maturity on the volatiles of the strawberry, Fragaria ananassa Duch.

Creator:: Amos, James Franklin
Abstract:: The effects of mold level (Botrytis cinerea), processing method (fresh, individually quick frozen (IQF), frozen sugared sliced (FSS), freeze dried (FD), canned, and preserves), and maturity (underripe, normal, and overripe) and strawberry volatiles were analyzed by gas liquid chromatography (GLC) using on-column entrainment of headspace volatiles in aqueous extracts. Computerized...
Resource Type:: Dissertation
Full Text:: . Cain, Dr. W. D. Loomis, Dr. A. W. Anderson, and Dr. K. E. Rowe, for their

ScholarsArchive@OSU

Measurement of nitrogenase activity of intact legume symbionts in situ using the acetylene reduction assay

Influence of the secondary metabolites of Mentha piperita L. on Tetranychus urticae Koch

Comparative gibberellin relationships in tall and dwarf peas (Pisum sativum L.)

Translocation of photosynthates in soybeans (Glycine Max. (L) Merr. cv. Wilkin) as affected by soil water potential and soil temperature

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

The effects of enhanced atmospheric CO₂ and N fertilization on growth and development of rice (Oryza sativa L.)

The glutamine synthetases in soybean root nodules and free-living Rhizobium japonicum

Selectivity and chemodynamics of 3,5-dibromo-4-hydroxybenzonitrile in winter wheat (Triticum aestivum L.) and coast fiddleneck (Amsinckia intermedia Fisch. & Mey)

Malate and tartrate in Oregon grapes

The influence of mold contamination, processing and maturity on the volatiles of the strawberry, Fragaria ananassa Duch.

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