Pour respecter les droits d'auteur, la version électronique de ce mémoire a été dépouillée de ses documents visuels et audio-visuels. La version intégrale du mémoire a été déposé au Service de la gestion des documents et des archives de l'Université de Montréal. / L’exposition Orazio and Artemisia Gentileschi : Father and Daughter Painters in Baroque Italy se tint au Metropolitan Museum of Art à New York du 14 février au 12 mai 2002. De tout ce qui fut écrit en lien avec cet événement, il ressort deux tendances principales. Tandis que certains clament la prééminence d’Orazio Gentileschi sur sa fille en se basant sur le message véhiculé tant dans l’exposition que dans son catalogue, d’autres, rassemblés autour des féministes, remettent en question cette vision en relevant les partis-pris culturels jouant en défaveur des femmes. Le jumelage expositionnel constitue un événement muséal temporaire dans lequel deux artistes sont juxtaposés afin de faciliter un jugement comparatif. Parmi les épisodes récents de cette nature, on compte notamment Matisse-Picasso. Nous nous pencherons ensuite sur deux artistes issus d'une même famille, mais appartenant à deux générations différentes, à savoir : Orazio et Artemisia Gentileschi. En relation avec l’exposition qui leur fut dédiée en 2002, nous nous demanderons plus précisément comment la prédominance que désiraient accorder les commissaires à Orazio Gentileschi s'articule devant la célébrité affirmée d’Artemisia depuis 1916. Le dossier critique de l'événement servira de point de départ à notre étude. Toute exposition constituant un discours, nous analyserons les commentaires et critiques provenant tant des revues savantes que populaires. La théorie de la réception de Stuart Hall aidera à catégoriser les différentes interventions selon qu'elles appartiennent au code hégémonique, c'est-à-dire à la vision exprimée par les commissaires, au code oppositionnel, correspondant ici à la critique féministe, ou encore au code négocié qui représente une synthèse des deux tendances précédemment mentionnées. / Orazio and Artemisia Gentileschi: Father and Daughter Painters in Baroque Italy took place at the Metropolitan Museum of Art in New York from 14 February 14 to 12 May 2002. Of all that was written about the event, two main tendencies stand out. While some claim Orazio’s preeminence by basing their assumption on both the exhibition and its catalogue, feminists call into question this assumption by drawing attention to cultural biases that disfavor women’s artistic recognition. The exhibitional pairing formula constitutes an extension of this phenomenon by allowing the public to make up their own judgement. Among recent episodes of that nature, we can think of Matisse-Picasso. We are also going to study two artists of the same family, to wit, Orazio and Artemisia Gentileschi. Relative to the exhibition dedicated to them in 2002, we are going to ask ourselves how Orazio’s dominance defended by the two exhibition organizers is articulated with Artemisa’s celebrity. The critical dossier of the event will serve as the starting point of our analysis. Considering that every exhibition constitutes a discourse, we are going to examine both popular and academic comments and critiques of the event. Stuart Hall’s reception theory is also going to assist us in determining if these interventions belong to the exhibition curators’ dominant code, the feminist critique’s oppositional code or the negotiated code that represents a blend of the former two positions.

<p>This study shows that herbs can be effectively screened for potiential bio-activity using in vitro methods. Further studies will be needed to better explore Artemisia afra&rsquo / s effect on immunoregulation, particularly long term effects of the herb on the immune system and its effect on other disease states.</p>

<p>Endocrine&ndash / disrupting compounds (EDCs) are exogenous compounds/chemicals which interfere with, or have adverse effects on the production, distribution and function of natural hormones, thereby affecting normal endocrine activity, health and quality of life of both humans and wildlife. The reproductive system is highly susceptible to EDCs due to it being controlled by an array of hormonal signals. The effects of EDCs on the male reproductive system include infertility, decreased sperm count, function and morphology, abnormal development of secondary sex characteristics, reproductive function and sexual behaviour as well as decreased libido. There are various sources by which EDCs enter the environment which include effluents from several industries (mining, agriculture, smelting, hazardous waste sites, manufacturing industries, etc.), sewage treatment effluents, urban and agricultural runoff and effluents which include natural and pharmaceutical chemicals excreted in the urine of humans and domestic livestock, pesticides, polychlorinated biphenyls, dioxins, plasticizers, surfactants, etc. Humans and animals can also be affected by EDCs by consuming food containing endocrine active substances. The growing concern regarding adverse effects due to EDC exposure of humans and wildlife, as well as the increased incidence of EDC contamination has prompted extensive research into the development and validation of screening tests to detect and monitor known EDCs and new substances with endocrine-disrupting capability. These screening tests involve assessing the effect of known and potential EDCs on reproductive function and development as well as&nbsp / hormone production. To assess the effect of EDCs on the reproductive system different methods are employed which include in vitro, in vivo and ex vivo methods. In vitro methods have been suggested as a suitable screening tool for EDC monitoring due to low costs, reduced animal usage, the use of standard and basic equipment as well as the ability to screen a large number of samples with multiple endpoints. Of the available in vitro methods, the minced testes method has been suggested as the most suitable method for screening EDCs and for this reason has been employed in this study. The aim of this study was thus to employ a minced testes method to screen samples for male reproductive toxicity using cell viability and hormone production (testosterone and estradiol) as endpoints.The first objective of this study was to optimize an in vitro testicular cell culture assay by determining both optimal luteinizing hormone (LH)&nbsp / concentration and incubation time needed for testosterone production. Testicular cell cultures were prepared and cells were treated with varying concentrations of LH (10, 1, 0.1, 0.01 and 0 mu/ml) and incubated for 4 hours and 20 hours. Testosterone production was evaluated for each incubation period. Testosterone production was significantly increased for both incubation periods at all LH concentrations tested as compared to the control. For both incubation periods, there was no significant difference in testosterone production between the different LH concentrations tested. From the data obtained, the 4 hour incubation period as well as the LH concentration of 10 mu/ml were selected as optimal for the testicular cell culture assay. The second objective of this study was to determine the effect of Tulbaghia violacea Harv. on the male reproductive system. T. violacea is a plant species indigenous to southern Africa and is used locally as a herbal remedy/medicine to treat several ailments. Cells were treated with varying concentrations of the T. violacea ethanol extract (with/without LH-treatment) and incubated for 4 hours. Hormone production and cell viability were evaluated. The results obtained from this pilot in vitro study demonstrated that the ethanol extract of T.violacea has androgenic properties by significantly increasing LH-induced testosterone production in mouse testes with no significant change in cell viability. The third objective of this study was to assess the effect of Sutherlandia frutescens(L.) R.Br and Artemisia afra Jacq. Ex Willd. on the male reproductive system. S. frutescens and A. afra are also plant species indigenous to southern Africa and used locally as a herbal remedy/medicine to treat several ailments. Ethanol extracts of each plant was prepared and cells were treated with varying concentrations of each extract (0, 156.25, 312.5, 625, 1250,2500 and 5000 &mu / g/ml) with or without LH-treatment and incubated for 4 hours. Cytotoxicity by LDH measurement and hormone production (testosterone and estradiol) were endpoints that were evaluated. The results obtained showed that the ethanol extracts of both plants are not cytotoxic to testicular cells and that A. afra decreases testosterone production at high concentrations. The fourth and final objective of this study was to assess the acute effect of four heavy metals, namely manganese, copper, cadmium and magnesium on the male reproductive system. These heavy metals are used extensively in manufacturing and mining industries. Cells were treated with varying concentrations of each metal salt (200, 100, 50, 25, 12.5, and 6.25&nbsp / &mu / M) with or without LH-treatment and incubated for 4 hours. Endpoints evaluated included cell viability, testosterone and estradiol production. The results obtained showed that manganese, cadmium and copper are highly toxic to testicular cells in vitro and therefore may potentially cause reproductive toxicity.</p>

<p>This study shows that herbs can be effectively screened for potiential bio-activity using in vitro methods. Further studies will be needed to better explore Artemisia afra&rsquo / s effect on immunoregulation, particularly long term effects of the herb on the immune system and its effect on other disease states.</p>

<p>Endocrine&ndash / disrupting compounds (EDCs) are exogenous compounds/chemicals which interfere with, or have adverse effects on the production, distribution and function of natural hormones, thereby affecting normal endocrine activity, health and quality of life of both humans and wildlife. The reproductive system is highly susceptible to EDCs due to it being controlled by an array of hormonal signals. The effects of EDCs on the male reproductive system include infertility, decreased sperm count, function and morphology, abnormal development of secondary sex characteristics, reproductive function and sexual behaviour as well as decreased libido. There are various sources by which EDCs enter the environment which include effluents from several industries (mining, agriculture, smelting, hazardous waste sites, manufacturing industries, etc.), sewage treatment effluents, urban and agricultural runoff and effluents which include natural and pharmaceutical chemicals excreted in the urine of humans and domestic livestock, pesticides, polychlorinated biphenyls, dioxins, plasticizers, surfactants, etc. Humans and animals can also be affected by EDCs by consuming food containing endocrine active substances. The growing concern regarding adverse effects due to EDC exposure of humans and wildlife, as well as the increased incidence of EDC contamination has prompted extensive research into the development and validation of screening tests to detect and monitor known EDCs and new substances with endocrine-disrupting capability. These screening tests involve assessing the effect of known and potential EDCs on reproductive function and development as well as&nbsp / hormone production. To assess the effect of EDCs on the reproductive system different methods are employed which include in vitro, in vivo and ex vivo methods. In vitro methods have been suggested as a suitable screening tool for EDC monitoring due to low costs, reduced animal usage, the use of standard and basic equipment as well as the ability to screen a large number of samples with multiple endpoints. Of the available in vitro methods, the minced testes method has been suggested as the most suitable method for screening EDCs and for this reason has been employed in this study. The aim of this study was thus to employ a minced testes method to screen samples for male reproductive toxicity using cell viability and hormone production (testosterone and estradiol) as endpoints.The first objective of this study was to optimize an in vitro testicular cell culture assay by determining both optimal luteinizing hormone (LH)&nbsp / concentration and incubation time needed for testosterone production. Testicular cell cultures were prepared and cells were treated with varying concentrations of LH (10, 1, 0.1, 0.01 and 0 mu/ml) and incubated for 4 hours and 20 hours. Testosterone production was evaluated for each incubation period. Testosterone production was significantly increased for both incubation periods at all LH concentrations tested as compared to the control. For both incubation periods, there was no significant difference in testosterone production between the different LH concentrations tested. From the data obtained, the 4 hour incubation period as well as the LH concentration of 10 mu/ml were selected as optimal for the testicular cell culture assay. The second objective of this study was to determine the effect of Tulbaghia violacea Harv. on the male reproductive system. T. violacea is a plant species indigenous to southern Africa and is used locally as a herbal remedy/medicine to treat several ailments. Cells were treated with varying concentrations of the T. violacea ethanol extract (with/without LH-treatment) and incubated for 4 hours. Hormone production and cell viability were evaluated. The results obtained from this pilot in vitro study demonstrated that the ethanol extract of T.violacea has androgenic properties by significantly increasing LH-induced testosterone production in mouse testes with no significant change in cell viability. The third objective of this study was to assess the effect of Sutherlandia frutescens(L.) R.Br and Artemisia afra Jacq. Ex Willd. on the male reproductive system. S. frutescens and A. afra are also plant species indigenous to southern Africa and used locally as a herbal remedy/medicine to treat several ailments. Ethanol extracts of each plant was prepared and cells were treated with varying concentrations of each extract (0, 156.25, 312.5, 625, 1250,2500 and 5000 &mu / g/ml) with or without LH-treatment and incubated for 4 hours. Cytotoxicity by LDH measurement and hormone production (testosterone and estradiol) were endpoints that were evaluated. The results obtained showed that the ethanol extracts of both plants are not cytotoxic to testicular cells and that A. afra decreases testosterone production at high concentrations. The fourth and final objective of this study was to assess the acute effect of four heavy metals, namely manganese, copper, cadmium and magnesium on the male reproductive system. These heavy metals are used extensively in manufacturing and mining industries. Cells were treated with varying concentrations of each metal salt (200, 100, 50, 25, 12.5, and 6.25&nbsp / &mu / M) with or without LH-treatment and incubated for 4 hours. Endpoints evaluated included cell viability, testosterone and estradiol production. The results obtained showed that manganese, cadmium and copper are highly toxic to testicular cells in vitro and therefore may potentially cause reproductive toxicity.</p>

L’exposition Orazio and Artemisia Gentileschi : Father and Daughter Painters in Baroque Italy se tint au Metropolitan Museum of Art à New York du 14 février au 12 mai 2002. De tout ce qui fut écrit en lien avec cet événement, il ressort deux tendances principales. Tandis que certains clament la prééminence d’Orazio Gentileschi sur sa fille en se basant sur le message véhiculé tant dans l’exposition que dans son catalogue, d’autres, rassemblés autour des féministes, remettent en question cette vision en relevant les partis-pris culturels jouant en défaveur des femmes. Le jumelage expositionnel constitue un événement muséal temporaire dans lequel deux artistes sont juxtaposés afin de faciliter un jugement comparatif. Parmi les épisodes récents de cette nature, on compte notamment Matisse-Picasso. Nous nous pencherons ensuite sur deux artistes issus d'une même famille, mais appartenant à deux générations différentes, à savoir : Orazio et Artemisia Gentileschi. En relation avec l’exposition qui leur fut dédiée en 2002, nous nous demanderons plus précisément comment la prédominance que désiraient accorder les commissaires à Orazio Gentileschi s'articule devant la célébrité affirmée d’Artemisia depuis 1916. Le dossier critique de l'événement servira de point de départ à notre étude. Toute exposition constituant un discours, nous analyserons les commentaires et critiques provenant tant des revues savantes que populaires. La théorie de la réception de Stuart Hall aidera à catégoriser les différentes interventions selon qu'elles appartiennent au code hégémonique, c'est-à-dire à la vision exprimée par les commissaires, au code oppositionnel, correspondant ici à la critique féministe, ou encore au code négocié qui représente une synthèse des deux tendances précédemment mentionnées. / Orazio and Artemisia Gentileschi: Father and Daughter Painters in Baroque Italy took place at the Metropolitan Museum of Art in New York from 14 February 14 to 12 May 2002. Of all that was written about the event, two main tendencies stand out. While some claim Orazio’s preeminence by basing their assumption on both the exhibition and its catalogue, feminists call into question this assumption by drawing attention to cultural biases that disfavor women’s artistic recognition. The exhibitional pairing formula constitutes an extension of this phenomenon by allowing the public to make up their own judgement. Among recent episodes of that nature, we can think of Matisse-Picasso. We are also going to study two artists of the same family, to wit, Orazio and Artemisia Gentileschi. Relative to the exhibition dedicated to them in 2002, we are going to ask ourselves how Orazio’s dominance defended by the two exhibition organizers is articulated with Artemisa’s celebrity. The critical dossier of the event will serve as the starting point of our analysis. Considering that every exhibition constitutes a discourse, we are going to examine both popular and academic comments and critiques of the event. Stuart Hall’s reception theory is also going to assist us in determining if these interventions belong to the exhibition curators’ dominant code, the feminist critique’s oppositional code or the negotiated code that represents a blend of the former two positions. / Pour respecter les droits d'auteur, la version électronique de ce mémoire a été dépouillée de ses documents visuels et audio-visuels. La version intégrale du mémoire a été déposé au Service de la gestion des documents et des archives de l'Université de Montréal.

Magister Scientiae - MSc (Medical BioSciences) / In the past three decades there has been a huge increase in the use of herbal medicine globally. The active principles of these herbal medicines are mostly unknown with supportive evidence for safety and efficacy very rare. SeptilinTM is a phytopharmaceutical formulation which is recommended for the treatment and management of various infections. It has been claimed to have immunomodulatory actions that potentiates the body's immune response. The immunomodulatory activity of SeptilinTM has not been well investigated via appropriate in vitro models. Therefore this study was undertaken to investigate the in vitro effects of SeptilinTM on biomarkers of specific immune pathways by using WBC. Stimulated and unstimulated WBC were incubated with the product. Enzyme linked immunosorbent assays were used to screen for IL-6, IL-10, and IFN? as biomarkers for inflammation, humoral immunity, and cell mediated immunity, respectively. Results show that the presence of SeptilinTM in LPS stimulated WBC has no effect on the release of IL-6 and IFN? production but stimulated IL-10 production. SeptilinTM in unstimulated WBC has no effect on the release of IL-10 and IFN? production but stimulatory effects on IL-6 production.

Magister Pharmaceuticae - Mpharm / The aim of this study was to determine quality control specifications needed for a dossier and an investigator's brochure of A. afra capsules, which can be used to motivate the registration and clinical testing of A. afra capsules in chronic asthma. The specific objectives were: (1) to establish the minimum product quality requirements for registration of A. afra capsules, (2) to prepare and pharmaceutically characterize a capsule product of A. afra freeze dried aqueous extract (FDAE) suitable for registration, and (3) to identify pharmaceutical product quality aspects of an investigator's brochure (IB) that would be appropriate for use in motivating a clinical trial of A. afra capsules in chronic asthma.

Made available in DSpace on 2014-06-11T19:32:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-02-03Bitstream added on 2014-06-13T19:22:04Z : No. of bitstreams: 1 marchese_ja_dr_botfca.pdf: 1209124 bytes, checksum: 3852bccf50e18f3028e21b50674aba78 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Artemisia annua L. (Asteraceae) é uma planta herbácea altamente aromática, nativa da Ásia e aclimatada no Brasil. As folhas são fonte abundante de artemisinina, uma lactona sesquiterpênica que, conjuntamente aos seus derivados semi-sintéticos, apresentam ação efetiva contra as cepas resistentes das espécies de Plasmodium causadoras da malária. Os objetivos deste trabalho foram identificar o mecanismo fotossintético e avaliar o efeito de diferentes condições de temperatura e fotoperíodo no crescimento e desenvolvimento do acesso CPQBA 2/39x1V de A. annua. Para identificar o mecanismo fotossintético foram realizados experimentos para determinar composição dos isótopos do carbono (d 13C) e a anatomia foliar associada a testes histoquímicos. Para avaliar o efeito da temperatura e fotoperíodo no crescimento e desenvolvimento de A. annua foram realizados dois experimentos em câmaras fotoperiódicas (o primeiro com temperaturas médias máx. de 37ºC e mín. de 19ºC e o segundo com máx. de 29ºC e mín. de 13ºC) e um experimento com 6 épocas de plantio em campo no município de Pato Branco-PR (26º11' S, 52º36' W e 760 m de altitude), sul do Brasil. Um último experimento realizado, foi a aplicação exógena de artemisinina em plantas de A. annua para verificar o papel da molécula na indução do florescimento. Como resultados, A. annua apresentou uma d 13C - 31.76 l 0.07, valor típico de espécies com mecanismo fotossintético C3, que apresentam em média valores de d 13C - 28. Os estudos da anatomia foliar e testes histoquímicos confirmaram os resultados encontrados para a d 13C, onde, a despeito da existência de células parenquimáticas formando um anel ao redor do feixe vascular, estas não apresentaram cloroplastos e amido, confirmando ser A. annua uma espécie de mecanismo... / Leaves of Artemisia annua L. are a plentiful source of artemisinin, a drug with proven effectiveness against malaria. One of the objectives of this work was to identify the photosynthetic type of A. annua through studies of the carbon isotope composition (d 13C) and the leaf anatomy. We also verified the growth and development of the CPQBA 2/39x1V accession under moist subtropical climate. Two experiments were carried out in greenhouse using photoperiodic chambers. The plants were submitted to photoperiods of 7, 9, 11, 13, 15 and 17 h, in two natural conditions of temperature: spring/summer (maximum of 37ºC and minimum of 19ºC) and autumn/winter (maximum of 29ºC and minimum of 13ºC). Another experiment with different planting dates at field was carried out in Pato Branco, PR (26º11' S, 52º36' W and 760 m), Southern part of Brazil. The last experiment was the application of artemisinin (0, 500, 5000, and 10000 mg L-1) in A. annua plants to verify the role of the molecule on the flowering induction. A. annua presented a d 13C - 31.76 l 0.07, what characterizes it as typical species with a C3 photosynthetic mechanism, with an average of d 13C- 28, while C4 species possess an average of d 13C - 14. The study of A. annua leaf anatomy confirms the results of d 13C, where, in spite of the existence of parenchymatic cells forming a different sheath surrounding of the vascular tissue, these cells do not have chloroplast or starch. These features do not describe the Kranz anatomy typical of C4 species. The application of artemisinin did not induce the flowering of A. annua at any of the concentrations used. The results suggest that the accumulation of the artemisinin in the pre-flowering and flowering phases in A. annua is not the physiological signal of floral induction in this species...

Magister Scientiae - MSc / This study shows that herbs can be effectively screened for potiential bio-activity using in vitro methods. Further studies will be needed to better explore Artemisia afra&rsquo;s effect on immunoregulation, particularly long term effects of the herb on the immune system and its effect on other disease states. / South Africa