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Now showing items 151-160 of 403
Development of a method for isolation of gram quantities of dissolved organic matter from sea water and some chemical and isotopic characteristics of the isolated material
(1969)
For the first time, gram quantities of dissolved organic matter have been isolated from several thousand liters of sea water with minor contamination. Optimum conditions for the adsorption of the dissolved organic matter ...
The relationship of species development, semen physiology and post mortem evaluations to reproduction in the American pen-raised chinchilla
(1969)
A literature review tracing the evolvement of the American pen-raised chinchilla was conducted; it indicated that there have never been three distinct species of chinchillas in the United States, brevicaudata, lanigera and ...
Selection of regression variables and contributions to the estimation of variance components
(1969)
This dissertation consists of two parts. In Chapter I an efficient procedure is described for identifying best regression subsets. In Chapter II the likelihood functions for the random, nested and random, classification ...
Gene action in intervarietal diallel crosses of upland cotton Gossypium hirsutum L
(1969)
A complete diallel cross consisting of all possible F₁ hybrid combinations among 9 selected cotton varieties and their corresponding F₂'s were studied using a split-plot design with four replications. Data were taken on ...
The effects of long-wavelength infrared radiation on the flying activity of stable flies, Stomoxys calcitrans (L.)
(1969)
Stable flies, Stomoxys calcitrans (L.), were exposed to infrared radiation to determine if they respond to such radiation emitted by cattle and other warm-blooded hosts. The infrared radiation was emitted from a spherical ...
Formulation of a model for packed distillation columns on the basis of field tests
(1969)
On the basis of a series of field tests which were made on a packed distillation column located near Refugio, Texas, several possible methods for the modeling of packed distillation columns were investigated. Because of ...
Studies on some extracellular bacterial proteases
(1969)
The production of extracellular endopeptidase by Aeromonas proteolytica, Merkel et al., was found to be influenced by a number of nutritional factors. There was an inverse relationship between endopeptidase synthesis and ...
An optimal dynamic policy for the design and maintenance of flexible pavements
(1969)
The primary objective of this research is to provide an analytical solution to the optimal flexible pavement design problem. The procedure is based upon empirical equations for deflection, performance, and traffic. These ...
A biosystematic study of the Chloris cucullata-chloris verticillata complex
(1969)
An investigation was undertaken to determine the taxonomic relationships of the Chloris-cucullata-C. verticillata complex and the variation patterns within these populations apparently resulting from hybridization. As ...