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Now showing items 181-190 of 403
Requirements and opportunities for entry workers in the occupation of producing and marketing ornamental nursery and greenhouse specialties
(1969)
Purpose [line break] The purpose of this study was to identify the types of competences needed by entry workers in the horticultural industry and to describe the occupation for those considering the industry as an occupational ...
An experiment to determine the effectiveness of slides and audio-tapes for presenting manipulative demonstrations in graphic arts
(1969)
The purpose of the study w as to compare a slide-tape method of presenting demonstrations with teacher-presented demonstrations in junior high school graphic arts. The experiment was designed to examine initial learning ...
Effects of an experimental study aid on achievement in plane trigonometry of Texas A&M University students
(1969)
Statement of the Problem [line break] The purpose of this study was to determine the effects of an experimental study aid on university students' achievement in plan trigonometry. [line break] Description of Procedures ...
An analysis of factors related to the loss and retention of freshmen students at Tarleton State College for the academic years 1964 through 1966
(1969)
Purpose [line break] The purpose of this study was to identify and analyze factors as they relate to the withdrawal end persistence of first-time-in-college students. The specific objectives which served as guidelines for ...
An instructional communication system to supplement the teaching of high school physics
(1969)
The purpose of this study was to develop instructional learning units for a blackboard-by-wire electronic communication system (BBW) and to evaluate the effectiveness of this system as a mode of instruction in selected ...
A study of the effect of ethylene on auxin transport in cotton and its relationship to abscission
(1969)
An ethylene mediated inhibition of basipetal auxin transport in stem and petiole sections of cotton (Gossypium hirsutum L. var. Stoneville 213) was investigated using ¹⁴C labeled IAA and NAA. The purpose of this investigation ...
A consistent first-order nonlinear shell theory
(1969)
A general nonlinear theory of shells is derived. The theory is valid for large extensions, shear and rotations. The large rotations of the shell are described in detail. The measures of bending deformation then are written ...
A study of the production and propagation of high energy cosmic ray muons
(1969)
A critical reexamination of the diffusion of cosmic rays in the atmosphere is made. The incorrectness of the use of λ[subscript π], the pion attenuation mean-free-path, in the diffusion model is demonstrated. The muon ...
The isolation, identification and biochemical studies of phenolic acids from distillers dried solubles
(1969)
Studies were conducted to determine the phenolic acid composition of DDS, the sequestering property of phenolic acids and the biochemical involvement of phenolic acids (p-hydroxybenzoic and gentisic acids) in the metabolism ...
Neocortical and other modulating influences on the "immobility reflex."
(1969)
This study was undertaken to determine the influences of the neocortex on the neural mechanisms involved in the immobility reflex (animal hypnosis). Phylogenetically, an inverse relationship exists between the relative ...