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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

The efficacy of natural plant extracts (rosemary, sage, and thyme) in stabilizing hemp and soybean oils during storage

Doi, Brenda Kathleen 11 1900 (has links)
Lipid oxidation of edible oils is a concern due to undesirable effects on the organoleptic, nutritional, and toxicological aspects of fats and oils. Vegetable oils are particularly prone to lipid oxidation due to the susceptibility of the unsaturated double bonds of the fatty acids to oxidation. Hemp oil is high in unsaturated fatty acids, including gammalinolenic acid, which is an essential fatty acid. Theoretically, hemp oil would be prone to lipid oxidation; however, scientific data on the subject could not be found. Of the common vegetable oils of North America, the fatty acid composition of soybean oil most closely resembles that of hemp oil; however, gamma-linolenic acid is absent in soybean oil. The following studies monitored the oxidative stability of hemp and soybean oils based on the peroxide values, p-anisidine values, totox numbers, UV absorption measured at wavelengths of 232 and 268 nm, and fatty acid (%) compositions. A 48-week shelf-life study was performed to compare the oxidative stability of hemp and soybean oils with and without 0.125% (w/w) of rosemary, sage, or thyme extracts and stored in the dark at 38°C. Also, a 14-day accelerated storage study determined the quality of hemp and soybean oils exposed to 180°C for 0,4, 8, 12, and 24 hours and the effects of subsequent storage at 38°C in darkness. A 24-day accelerated storage study was used to monitor oxidation of hemp and soybean oils that were heated at 180°C for 4 hours prior to storage at 38°C in darkness, in order to determine the antioxidant efficacy of 0.10% and 0.05% (w/w) of rosemary, sage, or thyme extracts, and 0.10% and 0.05% (w/w) extract binary mixtures of rosemary + sage, rosemary + thyme, or sage + thyme. During long-term storage (48 weeks), the levels of lipid oxidation products (i.e. hydroperoxides, aldehydes, conjugated dienes and trienes) in hemp and soybean oils exhibited some changes during storage, but generally remained low throughout the study. This showed that hemp and soybean oils were not inherently prone to lipid oxidation. Based on the thermally-induced accelerated oxidation conditions, lipid oxidation was apparent in heated hemp and soybean oil samples as detected by the p-anisidine, totox number, UV absorption methods, and fatty acid contents. The peroxide values remained low after hightemperature heating, but progressively increased during storage. The addition of various concentrations and mixtures of rosemary, sage and thyme extracts before the thermal treatment, did not prevent oil deterioration due to heating, but effectively inhibited the generation of hydroperoxides during subsequent storage. / Land and Food Systems, Faculty of / Graduate
72

Polyhemoglobin-superoxide dismutase-catalase blood substitute for ischemia-reperfusion in brain

Powanda, Doi Douglas. January 2001 (has links)
No description available.
73

Salt-lick use by mammals in tropical rainforests of Peninsula Malaysia / 半島マレーシア熱帯雨林における中大型哺乳類の塩場利用

Doi(Tawa), Yuko 24 November 2023 (has links)
京都大学 / 新制・論文博士 / 博士(理学) / 乙第13577号 / 論理博第1579号 / 新制||理||1713(附属図書館) / 京都大学大学院理学研究科生物科学専攻(霊長類学・野生動物系) / (主査)教授 松田 一希, 教授 平田 聡, 准教授 杉浦 秀樹 / 学位規則第4条第2項該当 / Doctor of Science / Kyoto University / DFAM
74

Eine elektrophysiologische Studie zum Einfluss von Serotonin, den 5-HT-Rezeptoragonisten 8-OH-DPAT und DOI sowie dem Neuropeptid CCK-8S auf die Entladungsrate neostriataler Neurone narkotisierter Ratten

Wilms, Karina 04 July 2002 (has links)
An mit Urethan narkotisierten männlichen "Wistar"-Ratten erfolgte die extrazelluläre Einzelableitung der Aktionspotenziale von insgesamt 159 striatalen Neuronen. Mit Hilfe einer Mehrkanalelektrode wurden in die Nähe der Zellen mikroiontophoretisch verschiedene Substanzen appliziert. Die separate Gabe von Serotonin (5-HT), dem 5-HT1A-Rezeptoragonisten 8-OH-DPAT und dem sulfatierten Oktapeptid Cholezystokinin (CCK-8S) führte überwiegend zur Erhöhung der neuronalen Entladungsraten (Wilcoxon-Test signifikant mit p < 0,05), wohingegen der 5-HT2A/2C-Rezeptoragonist DOI nur an wenigen Neuronen einen Effekt induzierte, der hauptsächlich aus einer Reduktion der Entladungsraten bestand. Nach Koapplikation von Serotonin und CCK-8S überwogen ebenfalls aktivierende Effekte (Wt p < 0,05), jedoch wurde die neuronale Responsivität im Vergleich zur Einzelapplikation der beiden Substanzen signifikant reduziert (Chi2 p< 0,01). Da die Serotonin- bzw. 8-OH-DPAT-induzierten Effekte durch die spezifischen 5-HT1A-Rezeptorantagonisten WAY 100635 und S-UH 301 geblockt wurden und eine positive Korrelation der Serotonin- bzw. 8-OH-DPAT-Effekte (p < 0,05) nachgewiesen werden konnte, kann, trotz der entgegengesetzten Ergebnisse früherer Studien, das Vorhandensein von 5-HT1A-Rezeptoren im Neostriatum angenommen werden. Die Grundaktivität der durch Serotonin aktivierten Population war signifikant geringer (p > 0,05) als die der durch Serotonin gehemmten Neurone. Trotzdem zeigte sich keine Abhängigkeit der Responsivität der hier betrachteten Populationen auf die applizierten Serotoninagonisten von der Höhe der neuronalen Ruheentladungsrate. Die meisten der Serotonin-, 8-OH-DPAT-, DOI- bzw. CCK-8S-responsiven Neurone verteilten sich diffus über das gesamte Neostriatum. Nur die durch Serotonin aktivierte Population zeigte eine Präferenz der ventromedialen Bereiche des Neostriatum. Zusammenfassend kann gesagt werden, dass aufgrund der Ergebnisse der vorliegenden Studie die Existenz von 5-HT1A-Rezeptoren innerhalb des Neostriatum der Ratte in hohem Maße angenommen werden kann. Des Weiteren lässt sich vermuten, dass das Zusammenwirken von Serotonin und CCK-8S einen modulatorischen Einfluss auf die normale neuronale Funktion hat. Ob und in welchem Maße dieses letztgenannte Ergebnis eine therapeutische Relevanz zur Behandlung bestimmter Erkrankungen hat, bei denen Störungen im Neostriatum mit ursächlich sind, bleibt zu erforschen. / In rats anaesthetized with urethane single unit activity of 159 neostriatal neurones was extracellularly recorded and several drugs were microiontophoretically ejected. Separate administration of serotonin (5-HT), 8-OH-DPAT (a 5-HT1A/7-receptor-agonist) and the sulfated octapeptide cholecystokinin (CCK-8S) predominantly induced increases in the neuronal discharge rates (Wilcoxon test significant with p < 0,05), whereas the 5-HT2A/2C-receptor agonist DOI affected only a few neurones and mainly reduced firing. After coadministration of CCK-8S and serotonin activating effects also predominated (Wt p < 0,05), but the neuronal responsiveness was significantly reduced (Chi2 p
75

Eine elektrophysiologische Studie zum Einfluss von Serotonin, den 5-HT-Rezeptoragonisten 8-OH-DPAT und DOI sowie dem Neuropeptid CCK-8S auf die Entladungsrate neostriataler Neurone narkotisierter Ratten

Wilms, Karina. January 2002 (has links) (PDF)
Berlin, Humboldt-Univ., Diss., 2002.
76

«Je dois mettre dans ma tête que c’est pour rendre service» : engagements et contraintes de l’emploi des préposées au soutien à domicile embauchées par le Chèque emploi-service

Hamel-Roy, Laurence 03 1900 (has links)
No description available.
77

A tragédia em dois tempos: Ifigênia em áulis, de Eurípides, e 1874, de Ivo Bender

Blank, Deividi Silva January 2007 (has links)
Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Letras, Instituto de Letras e Artes, 2007. / Submitted by Cristiane Silva (cristiane_gomides@hotmail.com) on 2012-09-24T12:44:19Z No. of bitstreams: 1 deividiblank.pdf: 749155 bytes, checksum: 21df93904abb93a083763f4197ebfd13 (MD5) / Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2012-11-05T19:44:17Z (GMT) No. of bitstreams: 1 deividiblank.pdf: 749155 bytes, checksum: 21df93904abb93a083763f4197ebfd13 (MD5) / Made available in DSpace on 2012-11-05T19:44:17Z (GMT). No. of bitstreams: 1 deividiblank.pdf: 749155 bytes, checksum: 21df93904abb93a083763f4197ebfd13 (MD5) Previous issue date: 2007 / Esta dissertação de mestrado tem por objetivo comparar as tragédias Ifigênia em Áulis, de Eurípides, e 1874, uma das peças que compõem a Trilogia perversa, de Ivo Bender. Tendo-se em vista que este texto trágico de Bender constitui uma releitura do mito de Ifigênia, agora no contexto da Revolta dos Mucker, pretende-se averiguar em que medida o estudo de seus aspectos estrutural e semântico pode afastá-lo ou aproximá-lo de seu intertexto grego. Não se trata somente de estipular como o mito grego da moça imolada pelo próprio pai apresenta-se em duas peças distintas, mas também de destacar, em alguma medida, as características básicas assumidas pelo gênero trágico ao longo dos séculos. Para tanto, recorrer-se-á a um conjunto de textos teóricos e críticos que vão desde a Poética de Aristóteles até a teoria antropológica de Girard apresentada em A violência e o sagrado, passando por escritos de Nietzsche, Bornheim, Lesky, Kitto e outros. / Ce mémoire de maîtrise a pour but de comparer les tragédies Iphigénie en Aulide, d’Euripide, et 1874, l’une des pièces qui composent la Trilogia perversa, de Ivo Bender. En tenant compte du fait que ce texte tragique de Bender constitue une relecture du mythe d’Iphigénie dans le contexte de la “Revolta dos Mucker”, on cherche à vérifier dans quelle mesure l’étude de ses aspects structural et sémantique peut l’éloigner ou le rapprocher de son intertexte grec. Il ne s’agit pas simplement de préciser comment le mythe grec de la jeune fille immolée par son propre père se présente dans deux pièces différentes, mais également de relever en quelque sorte les caractéristiques acquises par le genre tragique tout au long des siècles. Pour atteindre cet objectif, on fait appel à un ensemble de textes théoriques et critiques qui vont de la Poétique d’Aristote à la théorie anthropologique de Girard présentée dans La violance et le sacré en passant par des écrits de Nietzsche, Bornheim, Lesky et Kitto, entre autres.
78

Renewing political legitimacy : pragmatic reforms and Doi Moi

Truong, Nhu Quynh-Thuy 03 September 2009 (has links)
The Vietnamese Communist Party (VCP) first launched Doi Moi [Renovation] in 1986—10 years after the VCP officially assumed power in 1976 of the Socialist Republics of Vietnam. As the VCP describes, Doi Moi is a comprehensive economic reform package with new initiatives toward building “a mixed economy” that introduces “market mechanism with state management and a socialist orientation” to Vietnam’s economy. With Doi Moi, pragmatism has evidently taken center stage in place of dogmatic concerns for ideological correctness. The thesis seeks to first examine the conditions and factors that gave impetus for the economic reforms in Vietnam. These conditions and factors are especially evident when they are examined in a comparative context with the Soviet Union and China’s experiences with similar reforms as they are done here in the thesis. Moreover, the change of orientation from a centrally planned economy to market-oriented economy is reflected in Doi Moi’s decentralization and economic liberalization reforms as well as the VCP’s opening up to international reintegration and reconciliation with namely the United States. From this examination, it is apparent that at the crux of the VCP’s decision to pursue reforms and the Vietnamese people's support for reforms are fundamental considerations of self and political interests—the VCP's to stay in power and the people's to subsist and prosper. Whether reforms are socialist or capitalist—in form or in practice—are thus of lesser importance to the VCP and Vietnamese people than whether reforms work or do not work. / text
79

An analysis of the DOI framework

Lindelöw, Jonas, Löfberg, Richard January 2006 (has links)
<p>This report describes and evaluates an application development framework called DOI, which is used for building document-oriented applications. A document-oriented application is an application where the user interface promotes a workflow that is tightly coupled to the business objects, instead of for example the functionality (as is the case in function-oriented applications).</p><p>The report provides a brief description of the underlying technologies, Java and Enterprise JavaBeans, followed by a description of the DOI framework. This entails technical descriptions as well as a more general overview of the framework and associated tools. There is also a more detailed description of how to create an application provided in an appendix.</p><p>In the evaluation phase we consider the following attributes: usability, extensibility, code quality and developing time. After taking into consideration how the different parts of the framework affect these attributes we conclude that DOI is a usable and extensible framework, which should contribute a great deal in the development process for applications belonging to the domain of applications targeted by the framework.</p>
80

Dois ensaios em macroeconomia

Silva, Marcus Vinícius Amaral e 10 March 2014 (has links)
Submitted by Maike Costa (maiksebas@gmail.com) on 2016-04-12T13:00:18Z No. of bitstreams: 1 arquivo total.pdf: 1701778 bytes, checksum: 4e6e0ca5635cf810784f97567b64095f (MD5) / Made available in DSpace on 2016-04-12T13:00:18Z (GMT). No. of bitstreams: 1 arquivo total.pdf: 1701778 bytes, checksum: 4e6e0ca5635cf810784f97567b64095f (MD5) Previous issue date: 2014-03-10 / This paper conducts tests for structural breaks in the reaction function of the Central Bank of Brazil to evaluate possible changes in the conduct of monetary policy in Brazil, taking into account the reaction function of the regressors are potentially endogenous variables. For this, we uses the methodology developed by Hall et al. (2012) who, using an extension of the framework developed by Bai and Perron (1998), develops a method capable of identifying multiple structural breaks at unknown periods. The main results indicate presence of structural breaks in the three reaction functions studied. Furthermore, the actions of monetary policy through interest rate Selic seem to suffer greater influence of deviations of inflation around its target, compared to changes in the output gap and the exchange rate. / Este estudo realiza testes de quebra estrutural na função de reação do Banco Central do Brasil para avaliar possíveis mudanças na condução da política monetária doméstica, levando-se em conta que os regressores da função de reação são potencialmente variáveis endógenas. Para isto, é utilizada a metodologia desenvolvida por Hall et al. (2012) que, utilizando uma extensão da estrutura desenvolvida por Bai e Perron (1998), elaboram um método capaz de identificar múltiplas quebras estruturais em períodos desconhecidos. Os principais resultados apontam para a presença de quebras estruturais nas três funções de reação estudadas. Além disso, as ações da política monetária, por meio da taxa de juros Selic, parecem sofrer maior influência dos desvios da inflação em torno de sua meta, comparativamente a variações no hiato do produto e na taxa de câmbio.

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