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Now showing items 581-590 of 662
Induction and regulation of detoxification enzymes in Heliothis zea (Boddie) by plant allelochemicals and insecticides
(1987)
The relationship between the diet of phytophagous insects and susceptibility to insecticides is complex. This dissertation attempted to shed light on several aspects of this relationship with Heliothis zea. The objectives ...
Modelling for combustion and sulphur retention efficiencies of fluidized bed combustors
(1987)
Studies on the combustion of coal and sulphur capture by limestone/lime particles are carried out analytically and verified with the experimental data reported elsewhere. Extensive experimental data are available for small ...
The effects of the sorghum seed safeners on sorghum mixed-function oxidase activity and chloroacetamide metabolism
(1987)
The chloroacetamide herbicides are effective in controlling many grassy weeds. The commonly used chloroacetamide herbicides are alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide] and metolachlor ...
Reaction mechanism of the buffer-catalyzed and substituted [beta]-cyclodextrin-catalyzed hydrolysis of catechol cyclic phosphates
(1987)
The mechanism for the imidazole-catalyzed hydrolysis of catechol cyclic phosphate has been investigated. The Bronsted β-value obtained for the buffer-catalyzed hydrolyses at a 1:1 buffer ratio was 0.41. The Hammett φ-value ...
The estimation of variance components in unbalanced models
(1987)
The estimation of variance components in random and mixed factorial analysis of variance models has been the topic of much research. When all the cells of the model have the same amount of data, uniformly, minimum variance, ...
Properties, reactivity, and mechanistic aspects of anionic transition metal carbonyl hydrides
(1987)
In order to examine the effects of phosphorus donor substitution in HFe(CO)₄⁻, a series of compounds of the form cation⁺ HFe(CO)₃P⁻ (P = P(OPh)₃, P(OMe)₃, P(OEt)₃, PPh₃, PPh₂Me, PMe₃, PEt₃) have been prepared. The phosphorus ...
The effects of disclosure of learning style : information about learning strategies, and counseling with learning resources on academic achievement and course satisfaction in United States Air Force Security Police courses
(1987)
This research studied the effects of advance disclosure of learning style on academic achievement and course satisfaction in adult learners. The subjects were 635 U.S. Air Force Security Police technical school students ...
Factors regulating the ingress and establishment of a woody plant (Prosopis glandulosa) in perennial grasslands
(1987)
A series of experiments were conducted to quantify the extent to which dissemination and establishment of mesquite is enhanced by activities of domestic livestock. In the Rio Grande Plains of south Texas, dispersal of ...
Effects of sublethal doses of selected insecticides on reproduction in Culex quinquefasciatus Say : (Diptera : Culicidae)
(1987)
Separate groups of Culex quinquefasciatus Say, UTMB strain, were exposed for 24 hrs as fourth instar larvae to sublethal concentrations of malathion, methoprene, propoxur and resmethrin. Effects on the insecticide-exposed ...
The total synthesis of (±) jaconecic acid
(1987)
Jaconecic acid (6) is a cyclic diacid produced when the pyrrolizidine alkaloid jacobine (5) is subjected to base hydrolysis. The first total synthesis of jaconecic acid was accomplished in 8 steps in an overall yield of ...