Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2018-01-31T21:07:06Z No. of bitstreams: 1 Antonio Fabio Reis Figueiredo.pdf: 2917269 bytes, checksum: 41197e6d18b286701e9cf3cfa3160e77 (MD5) / Made available in DSpace on 2018-01-31T21:07:06Z (GMT). No. of bitstreams: 1 Antonio Fabio Reis Figueiredo.pdf: 2917269 bytes, checksum: 41197e6d18b286701e9cf3cfa3160e77 (MD5) Previous issue date: 2017-02-15 / The use of selected yeasts is an important aspect in the production of quality beers, since in addition to the production of ethanol and carbon dioxide they contribute significantly to the formation of secondary compounds, which confer the flavor of the beer. These yeasts also settle easily in the middle, avoiding undesired contaminations, in addition to generally presenting high rates of yield, productivity and fermentation efficiency. Selenium (Se) is a mineral that performs antioxidant functions, being essential as trace element to human health and its deficiency is correlated to the occurrence of several diseases. Due to these properties, the incorporation of Se into some food and / or food supplements associated with yeast is already a reality. Considering that beer is the most consumed alcoholic drink in the world, this research aimed to select yeasts to produce artisan beer supplemented with selenium. To do so, using the multivariate analysis technique, the selection of yeasts with potential for brewing was initially performed, and three strains (SC52, SC57 and SC82) were selected; Then applying the Doehlert factorial design and using the Response Surface Methodology technique, the optimization of the fermentation parameters (fermentation temperature and selenium concentration) for the production of beer supplemented with selenium was carried out. The yeasts SC52 and SC82 presented significant responses for the production of the supplemented beer, and the optimum values (Se concentration and fermentation temperature) were 11 mg L-1 and 25.0? C for yeast SC52 and 12 mg L-1 and 23.5? C for yeast SC82; (CSeSC52 and CSeSC82) were produced on a microbrewery scale, the fermentation parameters of the process were evaluated and total selenium and selenium species present in yeast and beers were quantified. The beers produced presented fermentative results within the commercial standards, being recommended by DDR (Recommended Daily Dose) of Se, a maximum consumption of approximately 600 mL of CSeSC52 beer and 740 mL of CSeSC82 beer. / O uso de leveduras selecionadas constitui aspecto relevante na produ??o de cervejas de qualidade, pois al?m da produ??o de etanol e g?s carb?nico contribuem significativamente para a forma??o de compostos secund?rios, os quais conferem o flavor da cerveja. Estas leveduras tamb?m se estabelecem facilmente no meio, evitando contamina??es indesejadas, al?m de apresentarem, geralmente, altas taxas de rendimento, produtividade e efici?ncia na fermenta??o. O sel?nio (Se) ? um mineral que desempenha fun??es antioxidantes, sendo essencial como elemento tra?o ? sa?de humana e a sua defici?ncia est? correlacionada ? ocorr?ncia de v?rias doen?as. Devido a estas propriedades, a incorpora??o do Se em alguns alimentos e/ou suplementos alimentares associados a leveduras j? ? uma realidade. Considerando que a cerveja constitui a bebida alco?lica mais consumida no mundo, esta pesquisa objetivou selecionar leveduras para produzir cerveja artesanal suplementada com sel?nio. Para tanto, a partir do uso da t?cnica de an?lise multivariada, inicialmente foi realizada a sele??o de leveduras com potencial para produ??o de cerveja, sendo selecionadas tr?s cepas (SC52, SC57 e SC82); em seguida, aplicando o planejamento fatorial Doehlert e utilizando a t?cnica de Metodologia de Superf?cie de Respostas, realizou-se a otimiza??o dos par?metros fermentativos (temperatura de fermenta??o e concentra??o de sel?nio) para a produ??o de cerveja suplementada com sel?nio. As leveduras SC52 e SC82 apresentaram respostas significativas para a produ??o da cerveja suplementada, sendo que os valores ?timos (concentra??o de Se e Temperatura de fermenta??o) obtidos foram de 11 mg L-1 e 25,0 ?C para a levedura SC52 e 12 mg L-1 e 23,5 ?C para a levedura SC82; por fim, foram produzidas duas cervejas artesanais suplementadas com sel?nio (CSeSC52 e CSeSC82) em escala de microcervejaria, sendo avaliados os par?metros fermentativos do processo e quantificados o sel?nio total e as esp?cies de sel?nio presentes nas leveduras e nas cervejas. As cervejas produzidas apresentaram resultados fermentativos dentro dos padr?es comerciais, sendo recomendado em virtude da DDR (Dose Di?ria Recomendada) de Se, um consumo m?ximo de aproximadamente 600 mL da cerveja CSeSC52 e 740 mL da cerveja CSeSC82.

Made available in DSpace on 2014-12-17T14:16:33Z (GMT). No. of bitstreams: 1 DianaQCF_DISSERT.pdf: 1652131 bytes, checksum: 3725280f12290a694c1544f741074448 (MD5) Previous issue date: 2010-05-24 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The aim of this study was to determine the effects of the use of rosuvastatin in patients with atherosclerosis, in relation to blood parameters of selenium and selenoproteins, and also observe possible changes in gene expression of selenoproteins in these patients. The sample consisted of 27 adult and elderly patients with a clinical diagnosis of coronary artery disease undergoing angioplasty, treated at Natal Hospital Center hospital, Natal, RN. Patients were treated with rosuvastatin 10 mg/day during four months. Anthropometric variables such as body mass index (BMI) and Waist circumference (WC) were measured before and after treatment, as well as lipid profile, blood glucose and liver enzymes (AST and ALT). The diet of the patients was also analyzed using 24-hour diet recall. We analyzed the concentrations of selenium in plasma and erythrocytes, and also the activity of Glutathione Peroxidase and gene expression by Real Time PCR of selenoproteins GPx1, SelP1 and SelN1. Patients had mean age of 61.0 ? 9.4 years, 59.3% were men and 40.7% were women. After four months of treatment there was significant reduction of CA and, according to BMI, most were overweight. The intake of macronutrients, cholesterol, polyunsaturated fatty acids, monounsaturated and saturated was adequate, but the energy and fiber intake was below the recommendations. Regarding the selenium intake was observed a high prevalence of inadequacy. As expected, after treatment with rosuvastatin, a significant reduction in total cholesterol, LDL and glucose, which was not observed for HDL. Selenium concentrations in plasma and erythrocytes showed no changes, keeping within the established cutoffs. We observed a significant increase in GPx enzyme activity and mRNA expression of GPX1 and SEPN1, but not for gene SEPP1. Thus, it was found that treatment with rosuvastatin did not reduce the expression of selenoproteins. More studies are needed to clarify the effects of rosuvastatin on gene expression of selenoproteins in patients with atherosclerosis / Este trabalho tem como objetivo verificar os efeitos do uso da rosuvastatina em pacientes com aterosclerose, em rela??o aos par?metros sangu?neos de sel?nio e selenoprote?nas, bem como observar poss?veis altera??es na express?o g?nica de selenoprote?nas nesses pacientes. A amostra foi constitu?da de 27 pacientes adultos e idosos com o diagn?stico cl?nico de doen?a arterial coronariana submetidos ? angioplastia, atendidos no Natal Hospital Center, Natal, RN. Os pacientes foram tratados com 10mg/dia de rosuvastatina durante 4 meses. Vari?veis antropom?tricas, como ?ndice de Massa Corporal (IMC) e Circunfer?ncia Abdominal (CA), foram medidas antes e ap?s o tratamento, bem como o perfil lip?dico, glicemia e enzimas hep?ticas (AST e ALT). A dieta dos pacientes tamb?m foi analisada utilizando o Recordat?rio alimentar de 24 horas. Foram analisadas as concentra??es do sel?nio no plasma e nos eritr?citos, e tamb?m a atividade da enzima Glutationa Peroxidase e a express?o g?nica por PCR em Tempo Real das selenoprote?nas GPx1, SelP1 e SelN1. Os pacientes apresentaram idade m?dia de 61,0?9,4 anos, sendo 59,3% homens e 40,7% mulheres. Ap?s os quatro meses de tratamento observou-se redu??o significativa da CA e, de acordo com o IMC, a maior parte estava com sobrepeso. A ingest?o dos macronutrientes, colesterol, ?cidos graxos polinsaturados, monoinsaturados e saturados foi adequada, por?m a de energia e fibras estava abaixo das recomenda??es. Com rela??o a ingest?o de sel?nio foi observada uma alta preval?ncia de inadequa??o. Como esperado, ap?s o tratamento com a rosuvastatina, houve redu??o significativa do colesterol total e LDL, bem como da glicemia, o que n?o foi observado para o HDL. As concentra??es de sel?nio no plasma e eritr?citos n?o apresentaram altera??es, se mantendo dentro dos pontos de corte estabelecidos. Foi observado um aumento significante na atividade enzim?tica da GPx e na express?o de mRNA do GPX1 e SEPN1, mas n?o para o gene SEPP1. Dessa forma, foi verificado que o tratamento com a rosuvastatina n?o diminuiu a express?o das selenoprote?nas. Mais estudos s?o necess?rios para esclarecer os efeitos da rosuvastatina sobre a express?o g?nica de selenoprote?nas em pacientes com aterosclerose