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Search Results: 1 - 10 of 214732 matches for " Facioli Nara Lúcia "
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Modifica??o por via enzimática da composi??o triglicerídica do óleo de piqui (Caryocar brasiliense Camb)
Facioli, Nara Lúcia;Gon?alves, Lireny A.G.;
Química Nova , 1998, DOI: 10.1590/S0100-40421998000100003
Abstract: piqui (caryocar brasiliense camb) oil was transformed into a cocoa butter-like fat through an enzymatic interesterification reaction using lipozyme in the presence of stearic acid that was incorporated in the sn 1,3-3,1 position into triglyceride. stearic acid incorporation was determined by hplc, based on the quantification of the principal triglycerides (pop, pos e sos) found in cocoa butter. the proposed process was feasible with a reaction time of 240 minutes with 10% of lipozyme at 70oc and substract weight ratio of 0,33 (stearic acid:piqui oil).
Optimización del proceso de esterificación química del destilado de desodorización del aceite de soja previamente saponificado y acidulado
Facioli, Nara Lúcia,Barrera-Arellano, Daniel
Grasas y Aceites , 2002,
Abstract: In this research work, it was optimized the reaction conditions for the chemistry esterification of unsaponifiable matter in soybean oil deodorizer distillate. The process involves (i) alkaline hydrolysis of saponifiable matter; (ii) acidulation of soaps and (iii) acid catalyzed esterification of resulting total fatty acid. To determine the best process conditions to get the higher conversion rates of total fatty acids to ethylic esters, preserving the tocopherols, it was used, to analyze the results, the response surface methodology in a 2nd order factorial planning. In the step (i) saponification of soybean oil deodorizer distillate saponifiable matter using NaOH:total fatty acids molar ratio = 2:1, temperature = 80 o C and reaction time of 40 min. In the step (ii) the resulting soaps were rapidly and stoichiometrically converted in free fatty acids with sulfuric acid (23 %), using an acid molar excess of 50 %, at 80 o C, for 40 min and under atmospheric pressure. In the step (iii) the optima conditions for the esterification reaction of soybean oil deodorizer distillate were: ethanol:total fatty acids molar ratio from 6.4 to 11.2:1, SO2H4 concentration from 0.9 to 1.5 % and reaction time from 1.3 to 2.6 h, with ethyl esters conversion rates up to 98 %. The mathematical model obtained is predictive and statistically significant (p<0,05). The total tocopherol losses during the process were less than 10,5 %. En esta investigación fueron optimizadas las condiciones de reacción de esterificación de la materia saponificable del destilado de desodorización del aceite de soja. El proceso engloba (i) hidrólisis alcalina da materia saponificable; (ii) acidulación de los jabones y (iii) esterificación catalizada por ácido de los ácidos grasos totales resultantes. Las condiciones óptimas del proceso, para obtener el mayor rendimiento en ésteres etílicos y perdidas mínimas de tocoferoles, fueron determinadas usando la metodología de superficie de respuesta de un dise o factorial completo de 2a orden. Etapa (i) saponificación de la materia saponificable del destilado de desodorización del aceite de soja, usando: relación molar etanol:ácidos grasos totales = 2:1, temperatura = 80 o C y tiempo de reacción = 40 minutos. Etapa (ii) los jabones formados fueron rápidamente convertidos en ácidos grasos libres utilizando ácido sulfúrico (23 %), con exceso molar del 50 %, a 80 o C, durante 40 minutos a presión atmosférica. Etapa (iii) las condiciones óptimas para la reacción de esterificación del destilado de desodorización del aceite de soja saponificado y acidificado fue
Optimization of direct acid esterification process of soybean oil deodorizer distillate
Facioli, Nara Lúcia,Barrera-Arellano, Daniel
Grasas y Aceites , 2002,
Abstract: In this research work, the reaction conditions for the direct acid esterification of free fatty acid from soybean oil deodorizer distillate was optimized, using anhydrous ethyl alcohol and concentrated sulfuric acid as catalyst to determine the best process conditions to get the best conversion rates of free fatty acids to ethylic esters, preserving the tocopherols. The conversion extent of free fatty acids to ethyl esters was optimized using a Response Surface Methodology obtained through a second order factorial experimental design. The optima conditions for the direct acid esterification of soybean oil deodorizer distillate were: ethanol:free fatty acids from 6.4 to 11.2:1, H2SO4 concentration from 0.9 to 1.5 % and reaction time from 1.3 to 2.6 h, with conversions extent above 94 %. No significant tocopherol losses were observed during the process. Results showed a good fit between mathematical model and data obtained at different processing conditions, making this model predictive and statistically significant (p< 0,05). En este estudio fueron optimizadas las condiciones de reacción de esterificación ácida directa de los ácidos grasos libres del destilado de desodorización del aceite de soja, usando alcohol etílico anhidro y ácido sulfúrico concentrado como catalizador. Fueron determinadas las mejores condiciones de proceso para obtener las tasas de conversión más altas de ácidos grasos libres en ésteres etílicos, manteniendo los tocoferoles. Los resultados fueron analizados mediante la metodología de superficie de respuesta usando un delineamiento experimental factorial completo de segundo orden. Las condiciones óptimas encontradas para la esterificación ácida directa del destilado de desodorización del aceite de soja obtenidas fueron: etanol:ácidos grasos libres entre 6.4 y 11.2:1, concentración de ácido sulfúrico entre 0.9 y 1.5 % y tiempo de reacción entre 1.3 y 2.6 h, obteniendo tasas de conversión mayores que 94 %. No fueron observadas pérdidas significativas de tocoferoles durante el proceso. Los resultados mostraron un buen ajuste entre el modelo matemático y las respuestas experimentales para las diferentes condiciones del proceso, lo que permite considerar el modelo como predictivo y estadísticamente significativo (p< 0.05).
Modifica o por via enzimática da composi o triglicerídica do óleo de piqui (Caryocar brasiliense Camb)
Facioli Nara Lúcia,Gon?alves Lireny A.G.
Química Nova , 1998,
Abstract: Piqui (Caryocar brasiliense Camb) oil was transformed into a cocoa butter-like fat through an enzymatic interesterification reaction using Lipozyme in the presence of stearic acid that was incorporated in the sn 1,3-3,1 position into triglyceride. Stearic acid incorporation was determined by HPLC, based on the quantification of the principal triglycerides (POP, POS e SOS) found in cocoa butter. The proposed process was feasible with a reaction time of 240 minutes with 10% of Lipozyme at 70oC and substract weight ratio of 0,33 (stearic acid:piqui oil).
Efficient mispriming during apolipoprotein E genotyping
Souza, Gabriela Merheb de Azevedo;Romano, Nara Lúcia;Whittle, Martin R.;
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2005, DOI: 10.1590/S1676-24442005000100007
Abstract: the determination of apoe genotypes is a common clinical laboratory procedure. the most frequently used method involves a pcr amplification of the target region followed by a restriction enzyme digestion of the resultant amplicon to obtain a genotype-specific restriction fragment pattern. we describe an unexpected and surprising difficulty that was encountered during our routine laboratory casework.
Aspectos psicológicos em usuários de prótese ocular
Botelho, Nara Lúcia Poli;Volpini, Marcos;Moura, Eurípedes da Mota;
Arquivos Brasileiros de Oftalmologia , 2003, DOI: 10.1590/S0004-27492003000500018
Abstract: purpose: to evaluate psychological disturbances caused by acquired unilateral anophthalmia, the struggle for aesthetic recuperation on use of the ocular prosthesis, as well as involved interpersonal factors and psychosocial reintegration of these patients. method: thirty (30) patients with acquired unilateral anophthalmia without any other deformities in the orbital region and users of ocular prosthesis (16 males, 14 females) aged between 12 and 66 years, mean age 31.6 years, were submitted to an ophthalmic examination and psychological evaluation through a standardized questionnaire focusing on 66 questions lasting two hours in the period from january, 2000 to march, 2001. result: the highest incidence of acquired anophthalmia (47%) was in the age ranging from 0 to 6 years old. seventy (70)% of the patients are in the process of elaboration of their loss (n=21). the most used mechanisms of defense in the current situation were rationalization, repression, denial and displacement. thirty (30)% accept the present situation. after the triggering event (te) 36% manifested a depressive state 64% of whom got over the symptoms of depression. sixty percent (60%) adapted the ocular prosthesis right after the surgical treatment while 40% adapted it two or more years after the te. aesthetically 70% are satisfied while 30% are unsatisfied. fifty-three (53)% show low self-steem, 37% distorted self-image. conclusion: an integration among various elements of the multidisciplinary team made up of surgeons, ocularists, psychologists and support from family and friends is fundamental during the whole process of mourning due to the loss. a positive attitude towards the person dealing with the issue minimizes the loss in all of its aspects, offering recovery of interpersonal aspects and psychosocial reintegration as he/she is given adequate resources to become more secure. the prosthesis has two functions: on the one hand it returns to the patient self-image and self-steem allowing hi
Agentes comunitários de saúde: sentidos acerca do trabalho em HIV/AIDS
Silva, Nara Helena Lopes Pereira da;Cardoso, Cármen Lúcia;
Psicologia & Sociedade , 2008, DOI: 10.1590/S0102-71822008000200013
Abstract: the present study intends to extend discussions about the community health agents work in the primary attention, concerning hiv/aids. for this purpose, the objective was to give visibility to the constructed meanings regarding hiv/aids in a group of community health agents. a group interview was conducted with four agents. the interview was tape-recorded, transcribed and analyzed in the perspective of social constructionism. the analysis of the narratives informed how the different meanings attributed throughout the history of the epidemy are present in conceptions and in the work with hiv/aids, namely, the prejudice anchored by the scientific discourse; gender issues involved in work relations; contemporary values expressed in the ideals of perfection and youth. we emphasize that these meanings jointly constructed with group interaction, interpret and constitute health care. it is concluded that the creation of spaces for dialogical exchanges among professionals makes possible to question meanings apparently crystallized in relation to the thematic of hiv/aids.
Aspectos psicológicos em usuários de prótese ocular
Botelho Nara Lúcia Poli,Volpini Marcos,Moura Eurípedes da Mota
Arquivos Brasileiros de Oftalmologia , 2003,
Abstract: OBJETIVO: Avaliar os aspectos psicológicos decorrentes da anoftalmia unilateral adquirida, a luta pela recupera o estética com o uso de prótese ocular, assim como os fatores interpessoais envolvidos e a reintegra o psicossocial destes pacientes. MéTODO: Trinta pacientes portadores de anoftalmia unilateral adquirida, sem outras deformidades órbito-palpebrais e usuários de prótese ocular, sendo 16 do sexo masculino e 14 feminino, com idade variando de 12 a 66 anos, idade média 31,6 anos foram submetidos a exame oftalmológico e avalia o psicológica, por meio de questionário padronizado e semidirigido de 66 quest es, com dura o média de 2 horas no período de janeiro/2000 a mar o/2001. RESULTADOS: A maior incidência de anoftalmia adquirida (47%) está na faixa etária de 0 a 6 anos. Setenta por cento dos pacientes est o em processo de elabora o da perda (n=21) e os mecanismos de defesa mais utilizados em face da situa o instalada foram racionaliza o, repress o, nega o e deslocamento. Trinta por cento aceitam a realidade atual. Após o evento desencadeador (ED) 37% manifestaram estado depressivo, tendo desaparecido os sintomas em 64% deles. Sessenta por cento adaptaram a prótese ocular (PO) logo após o tratamento cirúrgico ao passo que 40% adaptaram-na 2 ou mais anos após o ED. Esteticamente 70% est o satisfeitos ao passo que 30% est o insatisfeitos. Cinqüenta e três por cento revelam auto-estima rebaixada e 37% auto-imagem distorcida. CONCLUS O: A integra o entre os vários elementos da equipe multidisciplinar constituída por cirurgi es, protéticos, psicólogos e o apoio da família é fundamental durante todo o processo de luto instalado pela perda. Atitude positiva para com a pessoa acometida facilita a vivência da perda em sua totalidade, o que proporcionará a reestrutura o dos aspectos interpessoais e reintegra o psicossocial da pessoa, pois os recursos de enfrentamento delas estar o fortalecidos. A prótese exerce dupla fun o, pois de um lado devolve ao paciente sua auto-imagem e auto-estima, possibilitando sua reintegra o psicossocial, enquanto por outro lado, pode tornar-se um instrumento que afasta a possibilidade da perda ser vivenciada em sua totalidade, contribuindo para que esses indivíduos adotem atitudes de repress o diante da realidade instalada. N o há rela o direta entre o resultado estético obtido com o grau de satisfa o do paciente. O preconceito é outro fator importante, pois pode interferir ou n o na reabilita o do sujeito, dependendo do comportamento que apresente diante da sociedade.
PHYSIOLOGICAL QUALITY AND STORAGE OF BEAN SEEDS AS AFFECTED BY LATE SIDE DRESSING NITROGEN QUALIDADE FISIOLóGICA E ARMAZENAMENTO DE SEMENTES DE FEIJ O EM FUN O DA APLICA O TARDIA DE NITROGêNIO EM COBERTURA
Mariana Zampar Toledo,Nara Rosseti Fonseca,M?nica Lúcia César,Rogério Peres Soratto
Pesquisa Agropecuária Tropical , 2009, DOI: 10.5216/pat.v39i2.3486
Abstract: Seed physiological quality is affected by cropping environment and plant nutritional status, standing out nitrogen supply. The objective of the research was the evaluation of physiological quality and storage of bean seeds, cv. Pérola, as affected by late side dressing nitrogen fertilization, in no-tillage system. The experimental design was the completely randomized block, analyzed as a 2x4 factorial, with four replications. Treatments consisted of two nitrogen doses (0 kg ha-1 and 90 kg ha-1), applied at the V4 growth stage, combined with four nitrogen doses (0 kg ha-1, 30 kg ha-1, 60 kg ha-1, and 120 kg ha-1), applied at the beginning of the R7 growth stage. Physiological quality of seeds was evaluated by germination and vigor tests right after harvest and after four months of storage. It was concluded that additional side dressing fertilization at the V4 growth stage resulted in seeds with better physiological quality, either right after harvest or after four months of storage. The effect on physiological quality of bean seeds by side dressing N, applied at the beginning of the R7 growth stage, was not observed after four months of storage. KEY-WORDS: Phaseolus vulgaris; germination; vigor; nitrogen fertilization; nutrition. A qualidade fisiológica de sementes é influenciada pelo ambiente de produ o e estado nutricional das plantas, destacando-se, neste sentido, a aduba o nitrogenada. O trabalho objetivou avaliar a qualidade fisiológica de sementes de feij o cv. Pérola, antes e após o armazenamento, em fun o da aplica o tardia de nitrogênio em cobertura, em sistema de semeadura direta. O delineamento experimental utilizado foi o de blocos casualizados, em esquema fatorial 2x4: dois níveis de nitrogênio (0 kg ha-1 e 90 kg ha-1), no estádio de desenvolvimento V4, e quatro níveis de nitrogênio (0 kg ha-1, 30 kg ha-1, 60 kg ha-1 e 120 kg ha-1), no início do estádio de desenvolvimento R7, com 4 repeti es. Avaliou-se a qualidade fisiológica das sementes, logo após a colheita e aos quatro meses de armazenamento. A aplica o adicional de N em cobertura no estádio V4 proporcionou a obten o de sementes de melhor qualidade fisiológica, logo após a colheita e a
Aplica o de enxofre em cobertura e qualidade fisiológica de sementes de feij o = Side dressing sulfur fertilization and physiological quality of bean seeds
M?nica Lúcia César,Nara Rosseti Fonseca,Mariana Zampar Toledo,Rogério Peres Soratto
Acta Scientiarum : Agronomy , 2008,
Abstract: A qualidade fisiológica das sementes pode ser afetada pelo estado nutricional das plantas, destacando-se, dentre os nutrientes, o fornecimento de enxofre, constituinte essencial dos aminoácidos. O trabalho objetivou avaliar os efeitos da aduba o sulfatada emcobertura sobre a qualidade fisiológica de sementes de feij o cv. Pérola. O delineamento experimental utilizado foi em blocos casualizados, com quatro repeti es. Os tratamentos foram constituídos por cinco doses de enxofre (0, 20, 40, 60 e 80 kg ha-1) em cobertura, na forma de sulfato de am nio, 22 dias após a emergência das plantulas. Avaliou-se a qualidade fisiológica das sementes logo após a colheita mediante testes de germina o e vigor. Aaplica o de enxofre, em cobertura, aumentou o vigor das sementes, avaliado pelo teste de envelhecimento acelerado; contudo, houve redu o do desenvolvimento inicial das plantulas com acréscimo da dose de S em cobertura até 50 a 60 kg ha-1. The physiological quality of seeds can be affected by the nutritional status of plants, with emphasis to sulfur supply, which is an essential component of amino acids. The research had as objective to evaluate the effects of side dressing sulfur fertilization on thephysiological quality of bean seeds, cv. Pérola. The experimental design was the completely randomized block, with four replications. The treatments consisted of five side dressing sulfur doses (0, 20, 40, 60, and 80 kg ha-1), in ammonium sulfate source, 22 days afterseedling emergence. The physiological quality of bean seeds was evaluated right after harvest, by tests of germination and vigor. Side dressing sulfur fertilization increased seed vigor, as evaluated by the accelerated aging test; however, there was a decrease in initial seedling development due to the increase in the S dose until 50 to 60 kg ha-1.
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