Thèse:Stockholm:2001.

Thesis (M. Ag. Sc.)--University of Adelaide, Dept. of Horticulture, Viticulture and Oenology, 1997. / Includes bibliographical references (leaves 184-195).

Thesis--Leyden, 1893.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / Bibliography: leaves 105-106. / This thesis focuses on the search for a more equitable urban environment. In Western Europe, the hope that cities are relevant forms of living and interacting, still exists. In Brussels, in the last fifteen years, the inhabitants formed a unique network of actions that attempts to recapture the city as a place where people have the right to work and live. One must look at the Brussels experience in light of the theories that led to the ideological development of the inhabitants' struggle. Theories, that share with the Brussels movement the search for social justice. The first part of this work contains an analysis of relevant aspects of Manuel Castells', David Harvey's and Henri Lefebvre's theories, and of Leon Krier's vision. The second part examines the network of urban struggles in Brussels and analyzes the relations hip of the theoretical contributions and the inhabitants' action. Finally, the conclusion will investigate the responsibility of the architect in the light of Brussels' experience. / by Monika Unger. / M.S.

A survey of the quality of brassica seed used for commercial transplant production revealed that overall germination was high but that there was a wide range of seed vigour, as assessed by the controlled deterioration test. These vigour differences were reflected in the performance of seed in modules, the use of low quality seed resulting in problems of a reduced rate of emergence and a lack of seedling uniformity. The improvement of seed quality was considered using three approaches. First, the use of seed soakwater conductivity as a means of predicting germination was investigated for individual seeds. This proved not to be a reliable means of sorting seeds. However, the combination of controlled deterioration followed by assessment of conductivity on bulks of seeds gave a good indication of vigour and was developed as a possible rapid vigour test. Secondly, the relation between seed size and seed performance was examined. No clear relationship was found between seed size and seed quality, although, seed size had a marked effect on seedling growth, the larger seeds consistently producing taller seedlings. Thirdly, a physiological means of seed improvement was considered. Aerated hydration in water columns was successful as an invigoration treatment resulting in increased germination rate, root length of seedlings and seed vigour leading to enhanced performance in modules. These improvements were maintained after drying and storage. The optimum short-term treatment was 8 hours hydration at 25oC. The improvement could be partly attributed to germination advancement and in addition the effect of temperature, aeration and the greater improvement of aged seeds suggested that repair processes were activated during aerated hydration. Also, prolonged hydration for up to 32 hours gave an improvement such that the performance of aged seed was not significantly different to unaged seed. Finally, one possible mechanism by which aerated hydration resulted in such improvements in seed quality was investigated. DNA synthesis began approximately 24 hours earlier in unaged than in aged seed. Hydration reduced this lag phase, indicating that the onset of DNA replication was accelerated. The use of hydroxyurea, an inhibitor of DNA replication, indicated that the repair of accumulated DNA damage may have been occurring between the 16th and 32nd hours of germination.

No description available.

The focus of my research was on the secondary metabolites produced by crucifer plants under stress and their biological activity against fungi. Both cultivated and wild plants were investigated to isolate phytoalexins and phytoanticipins, and determine their metabolite profiles.<p>The first chapter of this thesis describes cruciferous plants and their most important pathogenic fungi. These plants are divided into three groups: oilseeds, vegetables and wild species. The metabolites isolated from these plants and their biosynthetic studies are reviewed. In addition economically important necrotrophic fungi such as <i>Leptosphaeria maculans</i>, <i>Alternaria brassicae</i>, <i>Sclerotinia sclerotiorum</i> and <i>Rhizoctonia solani</i> are also reviewed along with their phytotoxins. <p>The second chapter of this thesis describes the detection, isolation, structure determination, syntheses of stress metabolites and biological activity of these metabolites against <i>L. maculans</i>, <i>S. sclerotiorum</i> and <i>R. solani</i>. The investigation of cauliflower led to the isolation of seven phytoalexins: 1-methoxybrassitin (55), spirobrassinin (71), isalexin (64), brassicanal C (60), caulilexins A (106), B (107), and C (105). The phytoalexins caulilexins A (106), B (107) and C (105) were reported for the first time. Caulilexin A (106), having a disulfide bridge, showed the highest activity against S. sclerotiorum and R. solani among the known phytoalexins. Similarly four phytoalexins: 1-methoxybrassitin, brussalexins A (121), B (117) and C (118) along with four metabolites: ascorbigen (51), diindolylmethane (50), 1-methoxy-3,3-diindolylmethane (119) and di-(1-methoxy-3-indolyl)methane (120) were isolated from Brussels sprouts. The phytoalexins brussalexins A (121), B (117) and C (118) are new metabolites. Brussalexin A (121) is the only cruciferous phytoalexins having an allyl thiolcarbamate functional group. The metabolite 1-methoxy-3,3-diindolylmethane (119) is reported for the first time.<p>The investigation of brown mustard for polar metabolites led to the isolation of indole-3-acetonitrile (76) and spirobrassinin (71) along with isorhamnetin-3,7-diglucoside (134). Investigation of wild species such as Asian mustard, sand rocket, wallrocket, hedge mustard and Abyssinian mustard for production of stress metabolites led to the isolation of indole-3-acetonitrile (76), arvelexin (84), 1,4-dimethoxyindole-3-acetonitrile (137), rapalexins A (138) and B (142), methyl-1-methoxyindole-3-carboxylate (59) and metabolites bis(4-isothiocyanotobutyl)-disulfide (139), 5-(3-isothiocyanato-propylsulfanyl)-pentylisothiocyanate (136) and 3-(methylsulfinyl)-propylisothiocyanate (135). <p>Two metabolites were also isolated from Brussels sprouts and brown mustard; however, these structures are not yet determined. The metabolites 1,4-dimethoxyindole-3-acetonitrile (137) and 5-(3-isothiocyanato-propylsulfanyl)-pentylisothiocyanate (136) are reported for the first time.

The focus of my research was on the secondary metabolites produced by crucifer plants under stress and their biological activity against fungi. Both cultivated and wild plants were investigated to isolate phytoalexins and phytoanticipins, and determine their metabolite profiles.<p>The first chapter of this thesis describes cruciferous plants and their most important pathogenic fungi. These plants are divided into three groups: oilseeds, vegetables and wild species. The metabolites isolated from these plants and their biosynthetic studies are reviewed. In addition economically important necrotrophic fungi such as <i>Leptosphaeria maculans</i>, <i>Alternaria brassicae</i>, <i>Sclerotinia sclerotiorum</i> and <i>Rhizoctonia solani</i> are also reviewed along with their phytotoxins. <p>The second chapter of this thesis describes the detection, isolation, structure determination, syntheses of stress metabolites and biological activity of these metabolites against <i>L. maculans</i>, <i>S. sclerotiorum</i> and <i>R. solani</i>. The investigation of cauliflower led to the isolation of seven phytoalexins: 1-methoxybrassitin (55), spirobrassinin (71), isalexin (64), brassicanal C (60), caulilexins A (106), B (107), and C (105). The phytoalexins caulilexins A (106), B (107) and C (105) were reported for the first time. Caulilexin A (106), having a disulfide bridge, showed the highest activity against S. sclerotiorum and R. solani among the known phytoalexins. Similarly four phytoalexins: 1-methoxybrassitin, brussalexins A (121), B (117) and C (118) along with four metabolites: ascorbigen (51), diindolylmethane (50), 1-methoxy-3,3-diindolylmethane (119) and di-(1-methoxy-3-indolyl)methane (120) were isolated from Brussels sprouts. The phytoalexins brussalexins A (121), B (117) and C (118) are new metabolites. Brussalexin A (121) is the only cruciferous phytoalexins having an allyl thiolcarbamate functional group. The metabolite 1-methoxy-3,3-diindolylmethane (119) is reported for the first time.<p>The investigation of brown mustard for polar metabolites led to the isolation of indole-3-acetonitrile (76) and spirobrassinin (71) along with isorhamnetin-3,7-diglucoside (134). Investigation of wild species such as Asian mustard, sand rocket, wallrocket, hedge mustard and Abyssinian mustard for production of stress metabolites led to the isolation of indole-3-acetonitrile (76), arvelexin (84), 1,4-dimethoxyindole-3-acetonitrile (137), rapalexins A (138) and B (142), methyl-1-methoxyindole-3-carboxylate (59) and metabolites bis(4-isothiocyanotobutyl)-disulfide (139), 5-(3-isothiocyanato-propylsulfanyl)-pentylisothiocyanate (136) and 3-(methylsulfinyl)-propylisothiocyanate (135). <p>Two metabolites were also isolated from Brussels sprouts and brown mustard; however, these structures are not yet determined. The metabolites 1,4-dimethoxyindole-3-acetonitrile (137) and 5-(3-isothiocyanato-propylsulfanyl)-pentylisothiocyanate (136) are reported for the first time.

Bernard Van Orley’s 1524 preparatory drawings for tapestries depicting The Story of Romulus and Remus have, until now, been largely ignored by art historical scholarship. The only signed and dated drawings in the artist’s oeuvre, they serve as a valuable tool for establishing a system of attribution for Van Orley’s work, particularly in tapestry. Van Orley was the leading tapestry designer in Brussels during the first few decades of the sixteenth century. He was the official court painter to Margaret of Austria and enjoyed a continuous stream of high-end commissions, which he used to experiment with new techniques in representation and compositional arrangement. Van Orley’s career thus exemplifies the significant changes in Flemish tapestry production that occurred during this time. This study examines all aspects of the drawings’ creation from their commission to their possible application in the weaving process. There is no surviving documentation regarding the commission for the project. A tentative case is made here for Margaret of Austria as the patron, working on behalf of her nephew, Charles V. The choice of subject and narrative treatment are considered in the context of the rising popularity of classical themes during the Renaissance. Stylistically, the drawings represent the moment of convergence of artistic influences on Van Orley from his contemporaries in both Italy and the North. From its origins through the late fifteenth century, tapestry was intended as a two-dimensional decorative wall hanging. Van Orley’s development of a distinct Brussels style blurred the distinctions between the viewer’s space and the narrative image. This new concept extended both the width and depth of space in tapestry and lent itself well to dramatic historiated designs that rivaled developments in contemporary painting. The drawings represent a definitive design stage within the complicated, multi-step collaborative process of Brussels tapestry production. The fact that they survive in such good condition is evidence of their importance as possible workshop models and later on as collectible works of art. / text

Doctorat en sciences sociales, politiques et économiques / info:eu-repo/semantics/nonPublished