Made available in DSpace on 2015-05-14T13:00:16Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1932289 bytes, checksum: a18b6ccc194715163ed381d04f52ec3d (MD5) Previous issue date: 2011-02-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The study aimed to perform toxicological tests and preclinical dermal clinical phase I, the hydrogel obtained from the hydroalcoholic extract from the bark of Anacardium occidentale Linn. The dermal preclinical studies have assessed the primary irritation of the skin - acute (single dose) and acute eye irritation (single dose) and in both experiments were used rabbits albino, New Zealand, healthy adults, numbering 12, with 6 males and 6 females (control and treated) for a dose of 0.5 g of the hydrogel obtained from the alcoholic extract of Anacardium occidentale Linn. The evaluation of primary irritation of the skin demonstrated that the hydrogel from the stem bark of Anacardium occidentale Linn is not irritating to the skin of rabbits tested in our laboratory, since only 25% of the rabbits showed barely perceptible erythema in the initial phase of the experiment (first time), and no degree of swelling was observed in rabbits throughout the experiment. In relation to the simple eye irritation, the hydrogel from the stem bark of Anacardium occidentale Linn also did not showed irritant effect, because only 33,3% and 8,3% rabbits showed, respectively, conjunctival redness and swelling in the first 24 hours after application of test substance. Did not present any change in level of the iris and cornea, in any animal throughout the experiment. To investigate the clinical phase I toxicity in humans, hydrogel from the stem bark of Anacardium occidentale Linn, we selected 28 volunteers, clinically healthy, aged between 18 and 25. Study participants were divided into two groups, male and female, with 14 participants each, and treated daily, on the night shift, via dermal, with the hydrogel from the stem bark of Anacardium occidentale Linn by a period of 4 weeks. The volunteers were tested before the start of the study and eight weeks after the study, haematological (CBC) and biochemical (glucose, urea, creatinine, total cholesterol, AST, ALT, alkaline phosphatase), in order to detect possible changes arising from the use of hydrogel in patients, as well as compare the results before and after the study. There was no evidence values changed for both hematology and for biochemical variables between times and groups. During treatment with the hydrogel from the stem bark of Anacardium occidentale Linn, Some adverse reactions were observed in participants: tingling, redness, and stinging, but the number of volunteers affected was small, and the reported symptoms occurred during the first weeks of the study and did not require specific treatment and disappeared spontaneously. Only 3,5% of the female volunteers reported feeling oily skin in three weeks of the study. In contrast, 10,7% (first week) and 3,5% (second week) of male volunteers reported skin feeling soft, "cleaner". These results suggest and the low toxicity of the product and indicate that this herbal formulation can be used by the population, the dose and route of administration tested. / O estudo objetivou realizar ensaios toxicológicos pré-clínicos dermais e clínicos fase I, com o hidrogel obtido a partir do extrato alcoólico das cascas de Anacardium occidentale Linn. Os estudos dermais pré-clínicos avaliaram a irritação primária da pele efeito agudo (dose simples) e a irritação ocular aguda (dose simples) e em ambos os experimentos foram utilizados coelhos albinos neozelandeses, sadios, adultos, em número de 12, sendo 6 machos e 6 fêmeas (controle e tratado) para uma dose de 0,5 g do hidrogel obtido a partir do extrato alcoólico das cascas de Anacardium occidentale Linn. A avaliação da irritação primária da pele demonstrou que o hidrogel das cascas do caule de Anacardium occidentale Linn não é irritante para a pele dos coelhos testados em nosso laboratório, já que apenas 25% dos coelhos estudados apresentaram eritema apenas perceptível, na fase inicial do experimento (primeira hora), e nenhum grau de edema foi observado nos coelhos durante todo o experimento. Em relação à irritação ocular simples, o hidrogel das cascas do caule de Anacardium occidentale Linn demonstrou também efeito não irritativo, porque apenas 33,3% e 8,3% dos coelhos, respectivamente, apresentaram rubor e edema em conjuntiva nas primeiras 24 horas após a aplicação da substância em estudo. Não foi identificada nenhuma alteração na íris e na córnea, em qualquer dos animais em todo o experimento. Para investigar a toxicidade clínica fase I, em seres humanos, do hidrogel das cascas do caule de Anacardium occidentale Linn, foram selecionados 28 voluntários, clinicamente saudáveis, com faixa etária compreendida entre 18 e 25 anos. Os participantes do estudo foram distribuídos em dois grupos, masculino e feminino, com 14 participantes cada um, e tratados diariamente, no turno da noite, por via dermal, com o hidrogel das cascas do caule de Anacardium occidentale Linn por um período de 4 semanas. Os voluntários foram avaliados antes do início do estudo e 8 semanas após o seu término com exames hematológicos (hemograma completo), bioquímicos (glicemia, uréia, creatinina, colesterol total, AST, ALT, fosfatase alcalina), com o objetivo de detectar possíveis alterações decorrentes da utilização do hidrogel nos pacientes, bem como, comparar os resultados antes e após o término do estudo. Não foram evidenciados valores alterados, tanto para as variáveis hematológicas como para as bioquímicas entre os tempos e os grupos. Ao longo do tratamento com o hidrogel das cascas do caule de Anacardium occidentale Linn, foram observadas algumas reações adversas nos participantes: formigamento, hiperemia, e ardência, mas o número de voluntários acometidos foi pequeno, e os sintomas relatados ocorreram nas primeiras semanas do estudo, não necessitando de tratamento específico, desaparecendo espontaneamente. Apenas 3,5% dos voluntários do sexo feminino relatou sensação de pele oleosa nas 3 últimas semanas do estudo. Em contrapartida, 10,7% (primeira semana) e 3,5% (segunda semana) dos voluntários do sexo masculino referiram sensação de pele macia, mais limpa . Estes resultados sugerem a baixa toxicidade do produto e indicam que esta formulação fitoterápica pode ser utilizada pela população, na dose e via de administração testada.

Landslides represent a serious hazard to people and property in the Pacific Northwest. Currently, the factors leading to sudden catastrophic failure vs. gradual slow creeping are not well understood. Utilizing high-resolution monitoring techniques at a sub-annual temporal scale can help researchers better understand the mechanics of mass wasting processes and possibly lead to better mitigation of their danger. This research used historical imagery analysis, precipitation data, aerial lidar analysis, Structure from Motion (SfM) photogrammetry, terrestrial laser scanning (TLS), and hydrologic measurements to monitor displacement of the Silt Creek Landslide in the western Cascade Mountain Range in Linn County, Oregon. This landslide complex is ~4 km long by ~400 m wide. The lower portion of the landslide reactivated following failure of an internal scarp in June 2014. Precipitation was measured on site and historical precipitation data was determined from a nearby SNOTEL site. Analysis of aerial lidar data found that the internal scarp failure deposited around 1.00x106 m3 of material over an area of 1.20x105 m2 at the uppermost portion of the reactivated slide. Aerial lidar analysis also found that displacement rates on the slide surface were as high as 3 m/yr during the 2015 water year, which was the year immediately following the failure. At the beginning of the 2016 water year, very low altitude aerial images were collected and used to produce point cloud data, via SfM, of a deformed gravel road which spans a portion of the reactivated slide. The SfM data were complimentary to the aerial and TLS scans. The SfM point cloud had an average point density of >7500 points per square meter. The resulting cloud was manipulated in 3D software to produce a model of the road prior to deformation. This was then compared to the original deformed model. Average displacement found in the deformed gravel road was 7.5 m over the 17 months between the scarp failure and the collection of the images, or ~3 m/yr. TLS point clouds were collected quarterly over the course of the 2016 water year at six locations along the eastern margin of the reactivated portion of the landslide. These 3D point cloud models of the landslide surface had an average density of 175 points per square meter. Scans were georeferenced to UTM coordinates and relative alignment of the scans was accomplished by first using the iterative closest point algorithm to align stable, off-slide terrain, and then applying the same rigid body translation to the entire scan. This was repeated for each scan at each location. Landmarks, such as tree trunks, were then manually selected at each location and their coordinates were recorded from the initial scan and each successive scan to measure displacement vectors. Average annual displacement for the 2016 water year ranged from a maximum of 0.92 m/yr in the uppermost studied area of the slide, to a low of 0.1 m/yr at the toe. Average standard deviation of the vectors of features on stable areas was 0.039 m, corresponding to a minimum detectable displacement of about ±4 cm. Displacement totals decreased with increasing distance downslope from the internal scarp failure. Additionally, displacement tended to increase with increasing distance laterally onto the slide body away from the right margin at all locations except the uppermost, where displacement rates were relatively uniform for all landmarks. Volumetric discharge measurements were collected for Silt Creek in 2016 using salt dilution gauging and found that discharge in the upslope portion of the study area was ~1 m3/s and increased to ~1.6 m3/s in the downslope portion. Landslide displacement rates were found to be much lower during the 2016 water year than during the 2015 water year, despite higher precipitation. This suggests that the over-all displacement trend was decoupled from precipitation values. Displacement rates at all locations on the slide decreased with each successive scan period with some portions of the landslide stopping by autumn of 2016, suggesting the study captured the slide as it returned to a state of stability. The spatial and temporal pattern of displacement is consistent with the interpretation that the landslide reactivation was a response to the undrained load applied by the internal scarp failure. This finding highlights the importance of detailed landslide monitoring to improve hazard estimation and quantification of landslide mechanics. This study provides new evidence that supports previous research showing that internal processes within landslide complexes can have feedback relationships, combines several existing 3D measurement tools to develop a detailed landslide monitoring methodology, uses a novel approach to landslide surface deformation measurements using SfM, and suggests that landslide initiation models which rely heavily on precipitation values may not account for other sources of landslide activation.

New technology may have negative, as well as positive, effects on a sociocultural system. Biodiesel is growing in popularity as a fuel alternative that addresses global warming and reduces dependency on petroleum. The biodiesel innovation fits well into the existing behavioral infrastructure of Linn and Benton Counties, Oregon. The introduction of this technology fuels two community-based biodiesel initiatives: the Corvallis Biodiesel Cooperative (CBC) and the OSU Biodiesel Initiative (OBI). However, the increasing demands for biodiesel increases the demand for vegetable oil. Canola is the most efficient oil producing crop suggested for the southern Willamette Valley of Oregon. Canola cropping fits into the behavioral infrastructure of local grass seed growers' tradition. However, canola cropping presents outcrossing risks to neighboring specialty seed and organic growers. This calls into question the resilience and sustainability of canola cropping. The decisions made about biodiesel production and oilseed cropping will impact the future environment, culture, political autonomy, and sustainability of this local community. The dominant values that serve this community will determine the resilience of culture and identity that is maintained or emerges in the face of social-ecological challenges and technological innovations. The research methodology includes interviews, participant observation, and informational media to triangulate data. These methods serve to inform an integrated framework of holistic, values analysis, social-ecological, and cultural materialism theoretical approaches. The holistic approach provides the behavioral components and the values analysis approach provides the mental components that are integrated into a cultural materialism framework. These components are evaluated by the social-ecological approach. Evaluation of the CBC and OBI suggests that values play a greater role in cultural materialism than previously believed. A new theoretical perspective emerges to explain resilience and causal effects. The social-ecological approach, illustrated by panarchy theory, is also integrated into the cultural materialism approach. The integration of the four theoretical approaches, and the emergence of a new theoretical perspective, provides a means to explain resilience and sustainability for the CBC and OBI. This integrated approach also examines three potential paths of resilience and sustainability for the grass seed, specialty seed, and organic growing traditions. Path A predicts long-term resilience and sustainability for grass seed growers and canola cropping, but collapse for the specialty seed and organic growing traditions. Path B predicts that a proposed regulated canola cropping compromise will only prolong the inevitable collapse of the specialty seed and organic growing traditions. Along both Paths A and B, diversity is lost from the sociocultural system as specialty seed and organic growing traditions decline. Canola cropping increases the potential for energy security, but food security is reduced. Path C suggests how to maintain the current sociocultural system of grass seed, specialty seed, and organic growing traditions and promote long-term resilience and sustainability. / Graduation date: 2006

Thesis (Ph.D.)--McMaster University, 2005. / Supervisor: Stephen Heathorn. Includes bibliographical references (leaves 326-338) and filmography (leaves 339-370).

Thesis (M.S.)--Oregon State University, 2009. / Printout. Includes bibliographical references (leaves 87-95). Also available on the World Wide Web.

I denna uppsats gör vi en komparativ analys av Lewis Carrolls (1865) originalversion Alice i Underlandet med en bilderboksversion av Susie Linn (2015). Syftet är att undersöka vad som skett efter att en adaption har genomförts från kapitelbok till bilderbok. Vi tittar på vilka skillnader och likheter det finns mellan böckerna, och det inkluderar även karaktärerna, vilka är Alice, den vita kaninen, kålmasken/fjärilslarven och Cheshirekatten, samt tre episoder, tebjudningen, krocketturneringen och rättegången. Analysens resultat visar att böckerna följer samma kronologi, men i bilderboken som en komprimerad version. Det finns vissa delar som är borttagna efter adaptionen till bilderboken men de mest kända episoderna är kvar. Resultatet visar även att karaktärerna har fått en mildare framtoning i bilderboken jämfört med kapitelboken. Vi kan också konstatera att litteraturen är relevant till att använda i undervisningen i förskoleklass upp till årskurs 3.

Submitted by Hiolanda Rêgo (hiolandar@gmail.com) on 2013-08-14T19:09:36Z No. of bitstreams: 1 Dissertação_ICS_Ryan dos Santos Costa.pdf: 1871906 bytes, checksum: 5e2c613abf3c789795d9adfa246e5a33 (MD5) / Made available in DSpace on 2013-08-14T19:09:36Z (GMT). No. of bitstreams: 1 Dissertação_ICS_Ryan dos Santos Costa.pdf: 1871906 bytes, checksum: 5e2c613abf3c789795d9adfa246e5a33 (MD5) / CNPq;CAPES;PPGIm-UFBA / A asma tem emergido como um importante problema de saúde pública da população urbana tanto de países desenvolvidos quanto dos países latino americanos. Para o tratamento desta doença há uma alta prevalência do uso de plantas medicinais devido a perda de eficácia e importantes efeitos colaterais relacionados às drogas classicamente utilizadas. A aplicação de plantas como medicamentos é tão velha quanto a humanidade e tem se tornado mais constante na ultima década. Neste contexto, Ocimum gratissimum Linn. (Og) é uma planta comumente utilizada na medicina popular brasileira para o tratamento de desordens inflamatórias como a asma. Baseado nisto, o presente estudo teve por objetivo avaliar os efeitos imunomodulatórios do Ocimum gratissimum e do seu fitoquímico polifenólico ácido rosmarínico (AR) em modelo murino de alergia respiratória induzida pelo ácaro Blomia tropicalis (Bt). A alergia respiratória foi induzida em camundongos A/J pela administração de antígeno de Bt e o tratamento foi realizado utilizando 100mg/Kg (v.o) do extrato metanólico do Og ou 200mg/Kg (i.p) do AR. Então foi analisada a alteração induzida por essas drogas nos parâmetros imunológicos relacionados com o processo alérgico, que são aumentados neste modelo, tais como a quantidade de leucócitos/eosinófilos no lavado broncoalveolar (BAL); a atividade da peroxidase eosinofílica no BAL e no pulmão; produção de muco; níveis de IgE no soro; alteração histopatológica no pulmão; e níveis de IL4 no BAL. O tratamento dos animais com Og e com o AR levou a redução estatisticamente significante na maioria dos parâmetros avaliados. Estes resultados sugerem que o extrato metanólico do O. gratissimum e o polifenol ácido rosmarínico possuem potencial antialérgico neste modelo murino de alergia respiratória caracterizada por inflamação eosinofílica. / Salvador

OLIVEIRA, Lorena Almeida. Caracterização estrutural e atividade antitumoral de polissacarídeo extraído do fruto de Morinda citrifolia Linn (Noni). 2014. 85 f. Dissertação (Mestrado em química)- Universidade Federal do Ceará, Fortaleza-CE, 2014. / Submitted by Elineudson Ribeiro (elineudsonr@gmail.com) on 2016-10-11T16:45:52Z No. of bitstreams: 1 2014_dis_laoliveira.pdf: 1742961 bytes, checksum: 150d926afa1dcc028017080ebb11f779 (MD5) / Approved for entry into archive by Jairo Viana (jairo@ufc.br) on 2016-10-11T23:51:14Z (GMT) No. of bitstreams: 1 2014_dis_laoliveira.pdf: 1742961 bytes, checksum: 150d926afa1dcc028017080ebb11f779 (MD5) / Made available in DSpace on 2016-10-11T23:51:14Z (GMT). No. of bitstreams: 1 2014_dis_laoliveira.pdf: 1742961 bytes, checksum: 150d926afa1dcc028017080ebb11f779 (MD5) Previous issue date: 2014 / Currently, cancer is a global public health problem. As an alternative therapy, many natural products have been evaluated for selection of active and with less undesirable effects capable of reducing malignant tumors more efficiently compounds. Morinda citrifolia, commonly known as noni, is a species native to Southeast Asia and Australia that has been popularly used for many therapeutic and nutritional purposes. The polysaccharide extracted from the pulp of Morinda citrifolia Linn fruits (Noni-ppt 1) was purified by reprecipitation in ethanol, yielding the subfractions: Noni-ppt 3 and Noni-ppt 5. The objective of this study was to investigate the antitumor activity in vitro and in vivo of Noni-ppt and carry out their physico-chemical characterization by high performance liquid chromatography (HPLC), gas chromatography (GC), fourier transform infrared spectrometry (FTIR), gel permeation chromatography (GPC), thermal gravimetric analysis (TGA), elemental analysis and 13C nuclear magnetic resonance (NMR). The in vitro cytotoxic activity of the three fractions of Noni-ppt (50 μg/mL) was evaluated on three tumor cell lines (HCT-116, SF-295 and OVCAR -8) by colorimetric method bromide 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). The in vivo antitumor effect of Noni-ppt 3 was analyzed in mice with tumor Sarcoma 180 at doses of 25 and 50 mg/kg/day orally and intraperitoneally. The physico-chemical analyzes showed that Noni-ppt consists of protein (12.1-13.7%), uronic acids (44.2-58.8%) and of total carbohydrates (65.4-71.3%). The monosaccharide composition analysis showed that Noni-ppt is a heteropolysaccharide composed predominantly of rhamnose, arabinose, galactose and galacturonic acid. The Noni-ppt samples showed no direct cytotoxic activity against tumor cells in vitro. Moreover, the treatment with Noni-ppt 3 did not show any inhibition of tumor growth in mice inoculated with Sarcoma 180 cells. / O câncer tem se configurado como um grande problema de saúde pública mundial. Como alternativa terapêutica, muitos produtos naturais têm sido avaliados para seleção de compostos ativos com menos efeitos indesejáveis e capazes de reduzir tumores malignos de modo mais eficiente. Morinda citrifolia, conhecida popularmente como noni, é uma espécie nativa do sudeste asiático e da Austrália que tem sido utilizada popularmente para diversos fins terapêuticos e nutricionais. O polissacarídeo extraído da polpa do fruto de Morinda citrifolia Linn (Noni-ppt 1) foi purificado por reprecipitação em álcool etílico, originando as subfrações: Noni-ppt 3 e Noni-ppt 5. O objetivo do presente trabalho foi investigar a atividade antitumoral in vitro e in vivo do Noni-ppt, bem como realizar sua caracterização físico-química utilizando técnicas de cromatografia líquida de alta eficiência (CLAE), espectroscopia de infravermelho (FT-IR), cromatografia de permeação em gel (GPC), análise termogravimétrica (TGA), análise elementar de nitrogênio e ressonância magnética nuclear de 13C (RMN). A atividade citotóxica in vitro das três frações de Noni-ppt (50 μg/mL) foi avaliada sobre três linhagens de células tumorais (HCT-116; SF-295 e OVCAR-8) por meio do método colorimétrico brometo de 3-(4,5-dimetiltiazol-2-il)-2,5-difeniltetrazolio (MTT). O efeito antitumoral in vivo do Noni-ppt 3 foi analisado em camundongos com tumor Sarcoma 180 nas doses de 25 e 50 mg/Kg/dia por via oral e intraperitoneal. As análises físico-químicas demonstraram que o Noni-ppt é composto por 12,1-13,7% de proteínas, 44,2-58,8% de ácidos urônicos e 65,4-71,3% de carboidratos totais. A análise da composição monossacarídica demonstrou que o Noni-ppt é um heteropolissacarídeo constituído, predominantemente, por ramnose, arabinose, galactose e ácido galacturônico. Os resultados da avaliação da atividade antitumoral in vitro demonstraram que as amostras de Noni-ppt 1, 3 e 5 não apresentam nenhuma atividade citotóxica direta sobre as células tumorais na concentração testada. Além disso, não foi observada qualquer inibição do tumor nos camundongos inoculados com as células tumorais.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-26T19:42:21Z No. of bitstreams: 1 VivianeHiromiUchida_DISSERT.pdf: 2246882 bytes, checksum: 2d32d23410d1769a404aaae1487d77b2 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-29T17:54:27Z (GMT) No. of bitstreams: 1 VivianeHiromiUchida_DISSERT.pdf: 2246882 bytes, checksum: 2d32d23410d1769a404aaae1487d77b2 (MD5) / Made available in DSpace on 2016-01-29T17:54:27Z (GMT). No. of bitstreams: 1 VivianeHiromiUchida_DISSERT.pdf: 2246882 bytes, checksum: 2d32d23410d1769a404aaae1487d77b2 (MD5) Previous issue date: 2014-12-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / A Terminalia catappa Linn pertencente ? fam?lia Combretaceae, popularmente conhecida como castanhola, possui frutos constitu?dos por uma polpa carnosa, semente arredondada e uma casca muito dura. A pigmenta??o natural existentes no fruto da castanhola indica a presen?a de antocianinas, componentes de natureza fen?lica pertencentes ao grupo dos flavon?ides, que apresentam atividade antioxidante. A presente pesquisa foi realizada com a castanhola e teve como principal objetivo o estudo de fatores que influenciam a extra??o de corantes a partir de sua polpa. Os extratos foram obtidos utilizando-se um reator enjaquetado por extra??o s?lido l?quido. Os fatores avaliados foram a temperatura, o tempo, a propor??o do solvente e o pH de extra??o. Adotando-se um planejamento fatorial de 24 , com 4 repeti??es no ponto central, os efeitos destes fatores sobre o processo de extra??o foram analisados utilizando-se o software Statistica 7.0. A atividade antioxidante (AA), o teor de compostos fen?licos totais (CFT) e o teor de antocianinas monom?ricas totais (AMT) foram avaliadas como vari?veis resposta do planejamento. Na an?lise estat?stica dos resultados, os efeitos que mais influenciaram a extra??o foram diferentes para cada uma das respostas (CFT, AMT e AA). No entanto o pH se mostrou significativo para a extra??o de todos os compostos. O comportamento cin?tico da extra??o do corante tamb?m foi estudado para os compostos fen?licos totais, antocianinas monom?ricas e atividade antioxidante, em que o equil?brio foi atingido ap?s os 90 minutos de extra??o. No estudo da estabilidade das antocianinas a temperatura foi o fator que mais influenciou na estabilidade, contudo a concentra??o e o pH tamb?m tiveram influ?ncia / The Terminalia catappa Linn belonging to Combretaceae family, popularly known as castanets, has fruits consists of a fleshy pulp, rounded seed and a very hard shell. The natural pigmentation existing in the fruit of castanet indicates the presence of anthocyanins, phenolic nature components belonging to the group of flavonoids, which have antioxidant activity. This research was conducted with the castanets and aimed to the study of factors influencing the extraction of dyes from its pulp. The extracts were obtained using a reactor enjaquetado by solid-liquid extraction. The factors were evaluated as temperature, time, solvent ratio and pH extraction. Adopting a factorial design of 24 , with 4 repetitions at the central point, the effects of these factors on the extraction process were analyzed using Statistica 7.0 software. The antioxidant activity (AA), the content of phenolic compounds (CFT) and the total monomeric anthocyanin content (AMT) were evaluated as response variables planning. Statistical analysis of the results, the effects that influenced the extraction were different for each response (CFT, AMT and AA). However, the pH was significant for the extraction of all compounds. The kinetic behavior of the dye extraction was also studied for phenolic compounds, monomeric anthocyanins and antioxidant activity, in which the equilibrium was reached after 90 minutes of extraction. To study the stability of anthocyanins temperature was the factor that most influenced the stability, however the concentration and pH also played a part.

Made available in DSpace on 2014-06-12T16:26:25Z (GMT). No. of bitstreams: 2 arquivo1155_1.pdf: 1441766 bytes, checksum: 3090e50673db4f8353bc6516c2af26b5 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2008 / Inúmeros estudos científicos vêm sendo realizados no sentido de validar as informações populares referentes ao uso de plantas medicinais. É comum no estado de Pernambuco, assim como em todo o Brasil, a existência de feiras livres que comercializam produtos feitos com ervas e extratos naturais (com composição não padronizada), que associada à suscetibilidade do indivíduo agrava o quadro de acidentes por plantas tóxicas. Estes ensaios tiveram como objetivo a verificação da toxicidade do Extrato Bruto Seco e do Extrato aquoso mimetizando o seu uso popular (na forma de infusão), da folha da planta Vitex agnus castus Linn. popularmente conhecida por erva-de-caboclo e Liamba (PE), alecrim-de-planta (PA) e pau-de-angola (PA e MA). Este projeto visou esclarecer possíveis alterações provocadas pelo Extrato Bruto Seco (EBS) das folhas da Vitex agnus castus Linn no Sistema Nervoso Central e determinar sua toxicidade. A avaliação toxicológica pré clínica aguda (CL50) usando metanáuplios de Artemia salina Leach deu um valor de 801,266 μg/mL para Vitex agnus castus Linn. Os valores obtidos são próximos a 1000 μg/mL, indicando uma baixa toxicidade para esta planta. O extrato aquoso de V. agnus-castus não apresentou DL50 inferior a dose de 4g/kg, indicando baixa toxicidade aguda em ratos. Já o estudo toxicológico pré clínico crônico dos ratos por 90 dias com o EBS das folhas da Vitex anus castus Linn com doses de 2,18 mg/kg (uso popular), 10,9 mg/kg (dose 5x) e 54,5 mg/kg (dose 25x) nas doses usual , 5x a usual, 25x a usual mostrou uma pequena alteração já esperadas das transaminases hepáticas não apresentando nenhuma alteração histopatológica considerável