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Now showing items 861-870 of 939
Genotype-environment interaction and its effects on heterotic patterns in a diallel of exotic and local maize (Zea mays L.) in mid altitude zones of Kenya
(1993)
The purpose of this investigation was to determine, the effect of genotype-environment interaction on the heterotic patterns, heterotic groups, combining ability, inbreeding depression and grouping testing sites in mid ...
Essays in equilibrium selection and adaptive behavior
(1993)
This dissertation consists of two essays on experiments on the problem of equilibrium selection. The literature includes a variety of models in which multiple equilibria arise. One approach to the selection problem is to ...
Assessing populations in complex systems
(1993)
Surveys of wild populations seldom satisfy assumptions fundamental to the survey techniques used to assess them (i.e., spatial distributions tend to be nonrandom). When sample sizes (i.e., number of observations) are small, ...
Synthesis and characterization of dinuclear gold(I) complexes containing dithiolates and phosphines or bis(Diphosphine) donor ligands
(1993)
Dinuclear gold (I) "open ring" complexes of the type [Au2(MNT)(PR3)2] have been synthesized. The trialkylphosphines used include: PMe3, P(OPh)3, PEt3, PPh3 and PCy3. The molecular structure of these complexes, as determined ...
Study of the interactions between transition metal ions and peptides by 252Cf plasma desorption mass spectrometry
(1993)
This dissertation focuses on the study of interactions between transition metal ions [Cu(II), Zn(II), Pd(II), Pt(II)] and peptides (bradykinins and angiotensins). Chapter I provides an overview on the fundamental issues ...
An examination of the role of culture in the transaction of reader and text
(1993)
The primary purpose of this study was to determine if students' aesthetic involvement or preference would be influenced by the culture of the student or the culture portrayed in the text. Subjects included 122 fifth-grade ...
A comparison of heuristic evaluation and usability testing : the efficacy of a domain-specific heuristic checklist
(1993)
The need for cost-effective usability evaluation has led to the development of alternative usability methods. Reducing the number of participants in a usability test or using heuristic evaluation are the two approaches ...
Experimental study and mathematical modeling of sorption and desorption of volatile organic contaminants on soil
(1993)
The adsorption equilibria of various volatile organic contaminants on EPA standard soil were measured by a dynamic response technique based on frontal analysis chromatography. The adsorption isotherms were BET type II ...
Two-phase flow of HCFC-22 and HFC-134a through short tube orifices
(1993)
HCFC-22 and HFC-134a were used with short tube orifices having length to diameter ratios ranging from 5 to 20 in a 9.53 mm (3/8 in.) refrigerant line to investigate both two-phase and subcooled liquid flow entering the ...
Well production performance and well test analysis for hydraulically fractured wells
(1993)
During a hydraulic fracturing treatment, the injected fracture fluid usually leaks off into the formation around the fracture to some degree. This leakoff results in absolute and relative permeability reduction around the ...