Search
Now showing items 71-80 of 179
The organometallic chemistry of the group VA elements : compounds of arsenic and phosphorus containing arsinic acid, arsonic acid, arsenyl, phophinous acid or phosphinic acid groups
(1969)
(Diethylamino)dichloroarsine and bis(diethylamino)chloroarsine have been investigated as intermediates in syntheses which lead to a variety of arsinic and arsonic acids containing branched alkyl chains and poly(polymethy ...
Influence of egg consumption and energy level on performance, and livability of layers and upon cholesterol levels of blood, egg yolk and other body tissues
(1969)
Clinicians recommend a low cholesterol diet for patients with certain heart and vascular disorders. These recommendations have sometime inadvisedly led to rejection of nutritious foods such as eggs. Since vascular cholesterol ...
Elastic analysis of thick-walled, filament-wound cylinders under combined pressure and longitudinal loads
(1969)
Fiber-reinforced composite materials are utilized in many products in industry today, especially the plastics industry, and have great potential for future use. On recent development in reinforcement methods is the use of ...
An NMR investigation of the metal ion and proton catalyzed reactions of some vitamin B-6 Schiff base systems
(1969)
The alpha and beta deuteration of the alpha amino acids valine and alpha aminobutyric acid is easily accomplished by heating D₂O solutions which are 1 M in the amino acid, 0.2 M in pyridoxal, and 0.1 M in aluminum(III) ...
The effect of programed instruction in industrial arts at the junior high school level
(1969)
Problem [line break] The primary purpose of this study was to ascertain the value of programmed instruction using teaching machines in industrial arts at the eighth and ninth grade levels through an experimental study. ...
Physical characteristics of cottonseed related to seedling vigor and design parameters for seed selection
(1969)
Investigations were conducted to relate the physical characteristics of cottonseed to germination, subsequent seedling growth and final plant development. Many researchers have postulated that certain physical characteristics ...
Equilibrium studies of some anion radical solutions by electron spin resonance
(1969)
Ion pairing affects the E.S.R. spectra of cyclooctatetraene (COT) anion radical, influencing the rates and thermodynamic parameters of the line-broadening process and the disproportionation equilibrium, which controls the ...
An experiment to evaluate the relative effectiveness of two approaches to teaching college algebra in achieving selected objectives of college algebra in industrial technology curricula
(1969)
The purpose of the study was to evaluate the relative effectiveness of two approaches to teaching college algebra in achieving those objectives of college algebra in industrial technology curricula which can be pursued in ...
Two-phase, two-dimensional numerical simulation of individual well problems
(1969)
A new numerical simulation method was developed to solve two-dimensional reservoir problems of the type encountered in drilling and producing activities of a single well. The method includes more variables and is more ...
A study of the effects of fluoride on nucleic acids of Escherichia coli (Migula) Castellani & Chalmers
(1969)
Escherichia coli (American Type Culture Collection Number 11775) was grown in nutrient broth and treated with sodium fluoride at concentrations up to 0.30M and with radioactive fluoride ions (¹⁸₉F). DNA was isolated and ...