Index Catalog // ScholarsArchive@OSU

Influence of certain chemicals on the sensitivity of rat embryos to X-irradiation

Creator:: Loawhakasetr, Pathom
Abstract:: The effect of 2-aminoethyl-2-thiopseudourea[superscript .]Br[superscript .]HBr (AET), 2-mercaptoethylamine[superscript .]HC1 (MEA) and trisodium calcium chelate of diethylenetriaminepentaacetic acid (CaNa₃DTPA) on the radiosensitivity of rat fetus was investigated. A total of 1256 fetuses were critically examined. Exposure of rats to 200 r whole-body X-irradiation at 9.5 days of gestation resulted in a...
Resource Type:: Dissertation

The relationship of initial weight to growth rate in preweaning pigs

Creator:: Keeler, Joseph Lambert
Abstract:: Growth data compiled in this study were collected by using pigs farrowed during the fall, 1963 and spring, 1964 farrowing seasons of the Oregon State University swine herd. Thirty-seven trios of light-, medium- and heavy-birth-weight suckling pigs were used to determine the effect of birth weight on subsequent rate of...
Resource Type:: Masters Thesis

Cardiovascular changes during pregnancy in the ewe

Creator:: Parer, Julian Thomas, 1934-
Abstract:: In order to study maternal cardiovascular adjustments to pregnancy, serial determinations were carried out on five pregnant and lour nonpregnant ewes. Measurements were made at approximately two to three week intervals, and continued for nine weeks after delivery. Cardiac output was measured with the dye dilution technique using Evans blue...
Resource Type:: Dissertation

Influence of isolated alfalfa coumestrol on growth of lambs

Creator:: Bahn, Alan Volker
Abstract:: The objective of the thesis was to determine the effects of isolated coumestrol on the growth, carcass characteristics and certain organs of wether lambs. The first of two trials was conducted over an eight week period with two groups of heavy wether lambs. Trial two was conducted over an 11...
Resource Type:: Masters Thesis

Some techniques for determining fecal output and digestibility of range forage by cattle

Creator:: Pryor, William Joseph
Abstract:: A Cr₂0₃, and cellulose fibre mixture was used with cattle, in three grazing and two semi-restricted experiments, to study the mode of its excretion, the possibility of using it in a once-daily dosing and grab-sample regime to estimate fecal output and in a field experiment to test a hypothesis involving...
Resource Type:: Dissertation

Determination of intake and digestibility of pasture forages using conventional and indicator techniques

Creator:: Alpan, Suleyman Orhan
Abstract:: Digestibility experiments were carried out with dairy heifers to determine the digestibility of orchard grass, Dactylis glomerata, and also to evaluate the accuracy of various indicator techniques in pasture digestibility experiments. Chromic oxide was used as an external indicator to predict fecal dry matter output in three digestion trials. Cut...
Resource Type:: Masters Thesis

Selection applied, response of traits and combining abilities of inbred lines of beef cattle

Creator:: Hoornbeek, Frank K. (Frank Kent), 1928-
Abstract:: The investigations reported are based on two studies; the first is concerned with the selection practiced for performance in one inbred Angus and three inbred Hereford lines of cattle, the realized responses, levels of inbreeding and associated performance, and heritabilities of the performance traits. Selection differentials for all performance traits...
Resource Type:: Dissertation

Selection for hybrid female reproductive performance in the mouse

Creator:: Chapman, Verne Merrill
Abstract:: The design of this study was suggested by the following observations: (1) the successful application of recurrent selection techniques in obtaining improvement of hybrid performance in corn and Drosophila, (2) the increased production realized by rotational crossbreeding, and (3) the expression of a relatively large degree of hybrid vigor in...
Resource Type:: Dissertation

Some genetic and environmental factors affecting weaning weights of lambs

Creator:: Dahmen, J. J. (Jerome John), 1919-
Abstract:: Eight purebred rams (four Suffolk and four Panama) previously selected as high and low on the basis of post-weaning performance feed test of 84 days were used each of three years. Each of the rams was mated to approximately 25 grade Panama ewes each year. One ram and 25 ewes...
Resource Type:: Dissertation

Effect of barley pretreatment on feeding behavior, rate and efficiency of gains for swine

Creator:: Gill, Donald Ralph
Abstract:: A series of four animal experiments utilizing 129 pigs and associated laboratory studies was conducted to study the causes of the lowered performance on high barley rations fed to swine. Previous work at this Station has shown barley to have a value of 80-85 percent of corn for swine, and...
Resource Type:: Dissertation

ScholarsArchive@OSU

Influence of certain chemicals on the sensitivity of rat embryos to X-irradiation

The relationship of initial weight to growth rate in preweaning pigs

Cardiovascular changes during pregnancy in the ewe

Influence of isolated alfalfa coumestrol on growth of lambs

Some techniques for determining fecal output and digestibility of range forage by cattle

Determination of intake and digestibility of pasture forages using conventional and indicator techniques

Selection applied, response of traits and combining abilities of inbred lines of beef cattle

Selection for hybrid female reproductive performance in the mouse

Some genetic and environmental factors affecting weaning weights of lambs

Effect of barley pretreatment on feeding behavior, rate and efficiency of gains for swine

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