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The influence of host nutrition on the development of xiphinema americanum

Creator:: Nigh, Edward L.
Resource Type:: Dissertation
Full Text:: express his sincere appreciation io Dr. Harold Jensen, Associate Nematologist, Department of Botany

Enzymatic and respiratory studies on the role of cobalt in legumes

Creator:: De Hertogh, August
Resource Type:: Dissertation
Full Text:: his sincere appreciation to Dr. Harold J. Evans for suggesting the problem, and for his interest

Some properties of ribonucleotide reductase in Rhizobium species

Creator:: Cowles, Joe Richard, 1941-
Abstract:: Ribonucleotide reductase from Rhizobium meliloti has been partially purified and characterized. The enzymatic reduction of ribonucleotides to deoxyribonucleotides is dependent upon B₁₂ coenzyme and dihydrolipoate. B₁₂ coenzyme was more effective than B₁₂ coenzyme analogues in the reductase reaction. The affinity of the R. meliloti reductase system for B₁₂ coenzyme was...
Resource Type:: Dissertation
Full Text:: REDUCTASE IN RHIZOBIUM SPECIES Abstract approved: Redacted for privacy Harold J. Evans Ribonucleotide

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:: RHIZOBIUM JAPONICUM Abstract approved: Redacted for Privacy Harold J. Evans Glutamine synthetase activity

The effect of univalent cation salts on properties of pyruvate kinase

Creator:: Wilson, Richard Hansel
Resource Type:: Dissertation
Full Text:: as one homogeneous peak in three different univalent cation o environments. A s 20 w value for

The biology and pathogenicity of a sheath nematode Hemicycliophora similis Thorne, 1955

Creator:: McKewan, Jeanette Anne
Abstract:: A study, using greenhouse and laboratory experiments, was made of Hemicycliophora similis from Bandon, Oregon to determine: identity and morphometrics, time and development of a life cycle, host plant preferences and optimum environmental conditions for reproduction and pathogenicity. Morphometric investigations revealed discrepancies between the measurements of this nematode species and...
Resource Type:: Masters Thesis
Full Text:: 192.5 INOCULATED NON - INOCULATED INOCULATED NON- INOCULATED 35 4.50 3.50 2.50 g. w >- 1.50 cc0

Relationship of Pratylenchus penetrans (Cobb, 1917) population density and yield of peppermint, Mentha piperita L.

Creator:: Pinkerton, John Nelson
Abstract:: A root-lesion nematode, Pratvlenchus penetrans, was determined to be a major component of peppermint stand decline in Western Oregon. Regression analysis showed that P. penetrans root densities in August were negatively correlated (P=0.01) with yield, while soil densities in August and root and soil densities in April were poorly correlated...
Resource Type:: Dissertation
Full Text:: , 1ENTHA PIPERITA L. Abstract approved: Redacted for Privacy Dr. Harold ,5,1 jenSen A root-lesion

The effects of cadmium on the nitrogen fixation system in Alnus rubra

Creator:: Wickliff, Carlos
Abstract:: Alnus rubra (Bong. ) seedlings were grown in sand culture and irrigated with nutrient solution containing CdCl₂ ranging from 5 μg to 100 mg per liter. Treatment of A. rubra seedlings for 4 weeks with 50 and 100 mg CdCl₂ per liter of nitrogen-free nutrient solution decreased in situ nitrogenase...
Resource Type:: Dissertation
Full Text:: sincere thanks to his co-major professors, Drs. Harold J. Evans and Donald B. Zobel, for their helpful

Investigations into the physiology of nitrogen fixation : Part I. Nickel metabolism of plants and bacteria : Part II. Peroxide scavenging in soybean root nodules

Creator:: Dalton, David Andrews
Abstract:: PART I. The concentration of nickel in some soils may be insufficient to meet the requirements of enzymes such as urease in soybeans and hydrogenase in Rhizobium. Nickel availability in soils was examined by measuring microbial urease activity in soils which were treated with glucose and urea. Supplemental nickel was...
Resource Type:: Dissertation
Full Text:: Nodules Abstract approved: v (Harold J. Evans) Redacted for privacy PART I. The concentration of

Bionomics of the hop cyst nematode, Heterodera humuli Filipjev, 1934 (Nematoda : Heteroderidae)

Creator:: Sen, Arun Kumar
Abstract:: The hop cyst nematode, Heterodera humuli Filipjev, 1934 was first reported from Europe in 1894, however, very little is known with respect to the biology and economic importance of this pest. Abundant material from Oregon hop yards provided an excellent opportunity to add additional details concerning the bionomics of this...
Resource Type:: Dissertation
Full Text:: ) Abstract approved: Dr. Harold J. Jensen The hop cyst nematode, Heterodera humuli Filipjev, 1934 was

ScholarsArchive@OSU

The influence of host nutrition on the development of xiphinema americanum

Enzymatic and respiratory studies on the role of cobalt in legumes

Some properties of ribonucleotide reductase in Rhizobium species

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

The effect of univalent cation salts on properties of pyruvate kinase

The biology and pathogenicity of a sheath nematode Hemicycliophora similis Thorne, 1955

Relationship of Pratylenchus penetrans (Cobb, 1917) population density and yield of peppermint, Mentha piperita L.

The effects of cadmium on the nitrogen fixation system in Alnus rubra

Investigations into the physiology of nitrogen fixation : Part I. Nickel metabolism of plants and bacteria : Part II. Peroxide scavenging in soybean root nodules

Bionomics of the hop cyst nematode, Heterodera humuli Filipjev, 1934 (Nematoda : Heteroderidae)

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