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Full-Text Articles in Life Sciences
Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover
Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover
Electronic Theses and Dissertations
A numerical method and model were developed to simulate soil moisture during steady-state and transient flow toward a tile drain. Intermittent application of water by drip irrigation and rainfall were simulated by use of finite difference approximation equations. No known analytical solution for these flow situations exists because of the complex mathematics describing unsaturated flow in the soil. The computer model is based on the electrical resistance network analog. The explicit finite difference equations were solved by the successive over-relaxation method for steady-state flow and by iteration for transient soil moisture flow. The computer program for the model consists of …
Cytopathology Of Barley And Corn Leaf Tissue Infected With The Nd18 Strain Of Barley Stripe Mosaic Virus, Charles R. Mcmullen
Cytopathology Of Barley And Corn Leaf Tissue Infected With The Nd18 Strain Of Barley Stripe Mosaic Virus, Charles R. Mcmullen
Electronic Theses and Dissertations
The distribution of the ND18 strain of barley stripe mosaic virus (BSMV) in barley (Hordeum vulgare L.) and corn (Zea mays L.) leaf tissue was studied with light and electron microscopes. Virions were detected in the cytoplasm of barley mesophyll cells, subsidiary, guard and epidermal cells, vascular parenchyma cells, sieve and tracheary elements. Nuclear virus was found in barley mesophyll cells. Ultrastructural cytopathological changes were greatest in the inoculated leaf of barley which contained fewer virus particles than either primary acute or chronically infected tissues. Primary acute and chronically infected barley tissues contained intracellular virions scattered in the cytoplasm, in …
Induction Of Parturition In The Ovine, Ernest L. Harman
Induction Of Parturition In The Ovine, Ernest L. Harman
Electronic Theses and Dissertations
The effects of flumethasone and prostaglandin F2 (PGF) on the time of parturition were studied in the ewe. Pregnant ewes with known conception dates were allotted into a 3 x 3 x 2 factorial designed experiment (1973 study) and into a completely random designed experiment (1974 study). In the 1973 study treatments consisted of three hormones (flumethasone, PGF and saline control), three levels (low, .5 mg flumethasone, 5 mg PGF, 1 cc saline; medium, 1.0 mg flumethasone, 10 mg PGF, 2 cc saline; high, 1.5 mg flumethasone, 15 mg PGF, 3 cc saline) and two routes of administration (IM …
A Comparative Study Of Ribonuclease From Two Winter Barley Cultivars Based Upon Separation, Purification And Partial Characterization Of Rna-Degrading Enzymes, Raymond Sze-Chung Wong
A Comparative Study Of Ribonuclease From Two Winter Barley Cultivars Based Upon Separation, Purification And Partial Characterization Of Rna-Degrading Enzymes, Raymond Sze-Chung Wong
Electronic Theses and Dissertations
The differences in the response to KCl of the RNA-degrading enzymes of two barley cultivars, “Dicktoo” (a hardy type) and "Tennessee Winter” (a non-hardy type), were investigated. Two types of enzymes, ribonuclease (RNase) and nuclease, were separated from crude extracts by disc electrophoresis. The electrophoretic gels were assayed for RNA-degrading activity in the presence and absence of EDTA (EDTA is a nuclease inhibitor). By means of density gradient isoelectric focusing, the nuclease preparation from Tennessee Winter was shown to have an isoelectric point between 5.3 and 5.5, while the nuclease preparation from Dicktoo has three isoelectric points of 4.9, 5.5 …
Factors Affecting The Development Of Lipase Flavor In Butter, Lawrence I. Bell
Factors Affecting The Development Of Lipase Flavor In Butter, Lawrence I. Bell
Electronic Theses and Dissertations
Current trends in the dairy industry have resulted in an increase in the incidence of lipase flavored butter. Raw cream, fresh and aged 24 h, was divided into 3 fractions and heat treated at temperatures of 72 C, 85 C, and 93 C. Each fraction of cream was churned into butter, with the butter divided and stored at -28. 9 C and 4.4 C. Lipase flavor development was measured organoleptically, by acid degree value (ADV), and free fatty acids (FFA) using a colorimetric procedure. Age of the cream had a significant effect (P< .01) on FFA and. ADV .levels, whereas heat treatment .of the cream had a significant effect (P< .01) on flavor only. Storage time had a significant effect (P< .01) on FFA, ADV, and flavor and the temperature of storage had a significant effect (P< .01) on FFA ·and flavor. Correlation between FFA and ADV was 0.86. There was no correlation between flavor and either JTFA or ADV
Amino Acid Additions To A Low Protein Corn-Soy Diet For Egg Production, Ali Baghaye Kashani
Amino Acid Additions To A Low Protein Corn-Soy Diet For Egg Production, Ali Baghaye Kashani
Electronic Theses and Dissertations
The present study was conducted to determine if the protein level of layer diets could be lowered from the: commonly used 16 percent to 12 percent by supplementation of some of the essential amino acids without reducing the performance of hens. The amino acids used were methionine, lysine, tryptophan and isoleucine. Egg production, egg shell thickness, interior egg quality, body weight, feed efficiency and free amino acid content of the albumen of eggs produced were criteria used to measure the (--) to treatment.