Thesis (M.S.)--Kent State University, 2009-07-15. / Title from PDF t.p. (viewed Mar. 8, 2010). Advisor: Andrea Case. Keywords: Attachment; peer relationships; middle childhood; emotion regulation. Includes bibliographical references (p. 77-96).

Typescript. / Thesis (Ph. D.)--University of Hawaii, 1966. / Bibliography: leaves [84]-88. / x, 88 l illus., tables

This thesis seeks to distinguish the main environmental parameters controlling the growth of Lobelia dortmanna and, by consideration of field conditions, describe which of these controls is most important in determining the zonation of the species, both horizontal and vertical, in Scottish lochs. A detailed analysis of growth across one season was undertaken in a Sutherland lochan, studying populations on sites of different nutrient status. Continuous recordings of temperature and light and monthly measurements of photosynthesis, soluble carbohydrate content and leaf production show continuous growth across the year. However, major increases in growth are strongly correlated to light increases, and only weakly with temperature. No differences occur between sites, so nutrient limitation is not thought to be important in growth. Germination studies reveal that seeds are absolute requirers of light for germination, are red-light promoted and require a cold stratification period before germination. Seeds germinate in low light, under conditions that seedlings subsequently cannot survive in. Examination of the light regime in Scottish lochs reveals that there is sufficient light for germination below the depth limit of zonation. Thus zonation is not controlled by a light requirement for germination. Studies of photosynthesis, pigment and carboxylase variations with depth in L. dortmanna reveal some ability to respond to shading, particularly increasing chlorophyll levels. However, chlorophyll/carboxylase ratios do not change, so indicating the plant is not typical of shade-adapting species. It is concluded that light control of photosynthetic production is the most important factor in controlling growth and zonation.

Thesis (Ph. D.)--University of Hawaii at Manoa, 1996. / Includes bibliographical references (leaves 145-153). / Microfiche. / viii, 153 leaves, bound ill. 29 cm

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Au cours de ce travail, nous nous sommes intéressés à développer des voies de synthèse convergentes et diastéréosélectives en vue de préparer des analogues pyrrolidiniques des alcaloïdes de Lobelia comme nouveaux ligands des récepteurs nicotiniques centraux à l’acétylcholine. Ainsi, nous avons mis au point une méthode « bidirectionnelle » basée sur des réactions de double aza-Michael et donnant accès à des pyrrolidines 2,5-disubstituées. Une étude de réactivité a également été mené afin d’améliorer la chimiosélectivité des différents processus réactionnels impliquant des réactions d’aza-Michael dans des séquences de cyclisation tandem. Dans un second temps, nous avons décrit une voie dite « d’élongation monodirectionnelle » permettant d’accéder à des 2,5-trans-pyrrolidines énantiopures. Enfin, la dernière partie de ce manuscrit aborde une étude prospective de réductions désymétrisantes pour la synthèse d’homologues pyrrolidiniques de la lobéline. / The present work has been dedicated to the development of convergent and diastereoselective routes for the preparation of pyrrolidine Lobelia alkaloid analogues as novel neuronal nicotinic receptors. We have settled a selective bidirectional strategy based on chain homologation by double olefination followed by aza-Michael reactions as a straightforward access to 2,5-cis-disubstituted pyrrolidines that was extended to the synthesis of 2,6-cis-piperidines. Additional studies have been carried out in order to drive chemoselectivities in the course of competitive tandem aza-Michael-induced ring closure reactions. In the same time, we also described a monodirectional route to access 2,5-trans-disubstituted pyrrolidines. The last part of this manuscript has been finally dedicated to a prospective reductive desymmetrization study for the rapid and enantioselective synthesis of pyrrolobeline homologues.

Co-occurring species of flowering plants may compete for pollination, which can cause character displacement by altering natural selection on floral traits. In a gynodioecious species, competition for pollination may also affect the evolution of sexual dimorphism of floral traits by influencing sex-specific selection. I demonstrated that Mimulus ringens did not affect seed set of gynodioecious Lobelia siphilitica, indicating that it is not a competitor for pollination. The presence of M. ringens did not alter selection upon most floral traits of L. siphilitica. I detected sex-specific selection upon five floral traits, supporting the hypothesis that sexual dimorphism evolves in response to sex-specific selection, rather than pleiotropic effects. My results also suggest that the presence of a co-flowering species may provide a context for sex-specific selection, and therefore, influence sexual dimorphism. Thus, my results suggest a link between the fields of study of competition for pollination and the evolution of sexual dimorphism. / NSERC, OGS, Ontario Innovation Trust, Canada Fund for Innovation

Thesis (doctoral)--Lunds universitet, 1983. / Includes bibliographical references.

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