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Id: biblio-1049076
Autor: Espinosa-Hernández, Edgar; Morales-Camacho, Jocksan Ismael; Fernández-Velasco, D. Alejandro; Benítez-Cardoza, Claudia G; Rosas-Cárdenas, Flor de Fátima; Luna-Suárez, Silvia.
Título: The insertion of bioactive peptides at the C-terminal end of an 11S globulin changes the structural stability and improves the antihypertensive activity
Fonte: Electron. j. biotechnol;37:18-24, Jan. 2019. tab, ilus, graf.
Idioma: en.
Projeto: Secretaría de Investigación y Posgrado IPN, México; . Consejo Nacional de Ciencia y Tecnología, México.
Resumo: BACKGROUND: The 11S globulin from amaranth is the most abundant storage protein in mature seeds and is well recognized for its nutritional value. We used this globulin to engineer a new protein by adding a four valinetyrosine antihypertensive peptide at its C-terminal end to improve its functionality. The new protein was named AMR5 and expressed in the Escherichia coli BL21-CodonPlus(DE3)-RIL strain using a custom medium (F8PW) designed for this work. RESULTS: The alternative medium allowed for the production of 652 mg/L expressed protein at the flask level, mostly in an insoluble form, and this protein was subjected to in vitro refolding. The spectrometric analysis suggests that the protein adopts a ß/α structure with a small increment of α-helix conformation relative to the native amaranth 11S globulin. Thermal and urea denaturation experiments determined apparent Tm and C1/2 values of 50.4°C and 3.04 M, respectively, thus indicating that the antihypertensive peptide insertion destabilized the modified protein relative to the native one. AMR5 hydrolyzed by trypsin and chymotrypsin showed 14- and 1.3-fold stronger inhibitory activity against angiotensin I-converting enzyme (IC50 of 0.034 mg/mL) than the unmodified protein and the previously reported amaranth acidic subunit modified with antihypertensive peptides, respectively. CONCLUSION: The inserted peptide decreases the structural stability of amaranth 11S globulin and improves its antihypertensive activity.
Descritores: Peptídeos/metabolismo
Proteínas/metabolismo
Globulinas/metabolismo
Anti-Hipertensivos/metabolismo
-Sementes
Temperatura
Meios de Cultura
Amaranthus
Estabilidade Proteica
Compostos Fitoquímicos
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1178840
Autor: Mamani Mayta, Deysi Danitza; Gutiérrez Durán, María Del Pilar; Serrudo Juárez, Jorge Armando; Gonzales Dávalos, Eduardo.
Título: Parámetros de calidad de harinas de Amaranthus caudatus Linnaeus (amaranto), Chenopodium quinoa Willd (quinua), Chenopodium pallidicaule Aellen (kañahua), Lupinus mutabilis Sweet (tarwi) / Quality parameters of flour of Amaranthus caudatus Linnaeus (amaranth), Chenopodium quinoa Willd (quinoa), Chenopodium pallidicaule Aellen (kañahua), Lupinus mutabilis Sweet (tarwi)
Fonte: Con-ciencia (La Paz);5(1):27-38, jun. 2017. ilus., tab..
Idioma: es.
Resumo: Las especies vegetales Amaranthus caudatus Linnaeus (amaranto), Chenopodium quinoa Willd (quinua), Lupinus mutabilis Sweet (tarwi), Chenopodium pallidicaule Aellen (kañahua), llamados también granos andinos, son desde hace mucho tiempo la base de alimentación de muchas familias en nuestro país, estos granos son reconocidos por su alto valor nutricional. En la actualidad varias empresas de nuestra región comercializan estos granos en su forma procesada. Este trabajo tuvo como finalidad establecer los parámetros de calidad e identificación de las harinas de amaranto, quinua, kañahua y tarwi provenientes de los municipios de Ancoraimes, Tomina, Huancané y Peñas, para ello se realizó el análisis micrográfico encontrándose almidón, aleurona y grasa como principales elementos. El análisis fisicoquímico realizado reportó un contenido de humedad en quinua de 6,03%, cenizas totales 2,52% y 3,8 ml como índice de hinchamiento. En amaranto un contenido de humedad de 5,76%, cenizas totales 2,86% y 6,8 ml como índice de hinchamiento. Tarwi reportó un contenido de humedad de 6,69%, cenizas totales 3,53%, y 3,6 ml como de índice de hinchamiento. Kañahua reportó un contenido de humedad de 5,82%, cenizas totales 3,53% y 4,75ml como índice de hinchamiento. El análisis químico cualitativo en los granos muestra la presencia mayoritaria de flavonoides, aminoácidos, antocianidinas, taninos.

The plant species Amaranthus caudatus Linnaeus (amaranth), Chenopodium quinoa Willd (quinoa), Lupinus mutabilis Sweet (tarwi), Chenopodium pallidicaule Aellen (kañahua), also called Andean grains, have long been the food base of many families in our Country, these grains are recognized for their high nutritional value. At present several companies of our region commercialize these grains in its processed form. The aim of this work was to establish the parameters of quality and identification of the amaranth, quinoa, kañahua and tarwi flours from the municipalities of Ancoraimes, Tomina, Huancané and Peñas. For this purpose, the micrographic analysis was performed with starch, aleurone and fat as main elements. The physicochemical analysis carried out reported a moisture content in quinoa of 6.03%, total ash 2.52% and 3.8 ml as swelling index. In amaranth a moisture content of 5.76%, total ash 2.86% and 6.8 ml as swelling index. Tarwi reported a moisture content of 6.69%, total ash 3.53%, and 3.6 ml as the index of swelling. Kañahua reported a moisture content of 5.82%, total ash 3.53% and 4.75ml as swelling index. The qualitative chemical analysis in the grains shows the majority presence of flavonoids, amino acids, anthocyanidins, tannins.
Descritores: Chenopodium quinoa
Lupinus
Dieta
Alimentos
Valor Nutritivo
-Plantas
Flavonoides
Amaranthus
Farinha
Aminoácidos
Responsável: BO138.1 - Biblioteca Central


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Id: biblio-1095876
Autor: Cáceres, Armando; Martínez-Arévalo, Vicente; Mérida-Reyes, Max S; Sacbajá, Aníbal; López, Alejandra; Cruz, Sully M.
Título: Contenido de oligoelementos y factores antinutricionales de hojas comestibles nativas de Mesoamérica / Content of trace elements and antinutritional factors in edible leaves native to Mesoamerica
Fonte: Cienc. tecnol. salud;6(2):132-148, jul dic 2019. ilus.
Idioma: es.
Resumo: Los oligoelementos son importantes constituyentes nutricionales de las hierbas comestibles. Se colectaron 11 especies, nueve nativas (Amaranthus hybridus, Cnidoscolus aconitifolius, Crotalaria longirostrata, Dysphania ambrosioides, Lycianthes synanthera, Sechium edule, Solanum americanum, S. nigrescens, S. wendlandii) y dos introducidas (Moringa oleifera, Spinacea oleracea) en dos regiones de Guatemala. Se prepararon muestras de la hierba seca, cocida y de caldo de hierba fresca. Se cuantificaron por espectrofotometría de absorción atómica los macro (N, P, K) y oligoelementos (Ca, Mg, Na, Cu, Zn, Mn), taninos por espectrofotometría y oxalatos por permanganimetría. El contenido de oligoelementos es diverso, para Zn, la hierba control S. oleracea contienen buena cantidad (90-140 ppm); de las nativas D. ambrosioides (130-160 ppm) y A. hybridus (70-80 ppm) tienen la mayor cantidad. Respecto a Fe las hierbas control tienen buena composición (S. oleracea, 220-280 ppm y M. oleifera, 105-135 ppm); de las nativas A. hybridus (90-240 ppm), C. aconitifolius (75-185 ppm) y L. synanthera (75-140 ppm) tienen buenas concentraciones. Se encontraron niveles elevados de oxalatos en S. oleracea (67.30 (5.51) mg/g), L. synanthera (56.30 (9.67) mg/g) y S. nigrescens (33.6 (5.48) mg/g); en las demás hierbas se encontraron niveles menores. Los niveles de taninos fueron bajos (0.1-0.8 mg/g) para todas las especies. Se demuestra que cuatro especies nativas tienen un buen contenido de oligoelementos y presentan valores menores de antinutricionales que los controles.

Trace elements are important nutritional constituents from edible herbs. Eleven species were collected in two regions of Guatemala, nine native (Amaranthus hybridus, Cnidoscolus aconitifolius, Crotalaria longirostrata, Dysphania ambrosioides, Lycianthes synanthera, Sechium edule, Solanum americanum, S. nigrescens, S. wendlandii) and two introduced (Moringa oleifera, Spinacea oleracea). Dry, cooked and broth samples were prepared. By atomic absorption spectrometry, macro (N, P, K) and trace elements (Ca, Mg, Na, Cu, Zn, Mn) were quantified, tannins by spectrophotometry, and oxalates by permanganometry. Trace elements content is diverse, for Zn, control herb S. oleracea contained high quantity (90-140 ppm); from the natives D. ambrosioides (130-160 ppm) and A. hybridus (70-80 ppm) contained high amounts. For Fe, control herbs had high composition (S. oleracea, 220-280 ppm, M. oleifera, 105-135 ppm); from the natives A. hybridus (90-240 ppm), C. aconitifolius (75-185 ppm) and L. synanthera (75-140 ppm) had the highest amounts. High levels of oxalates were demonstrated in S. oleracea (67.30 (5.48) mg/g), L. synanthera (56.30 (9.67) mg/g), and S. nigrescens (33.6 (5.48) mg/g); from the others levels.
Descritores: Oligoelementos/análise
Verduras/classificação
-Taninos/análise
Oligoelementos/administração & dosagem
Amaranthus/química
Jatropha/química
Desnutrição/prevenção & controle
Responsável: GT49.1


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Id: biblio-882836
Autor: Tumax, Sonia M; Mancilla, Gabriela; Cabrera, Edith; Alvarado, Madaí; Cáceres, Armando.
Título: Evaluación del contenido de selenio en hojas de hierbas nativas de uso tradicional en la alimentación del guatemalteco / Evaluation of selenium content in leaves of native herbs of traditional food use in Guatemala
Fonte: Cienc. tecnol. salud;4(1):49-57, 20170600. tab.
Idioma: es.
Resumo: El selenio (Se) es un elemento esencial para el ser humano que se encuentra en pequeñas cantidades en los suelos, pero se acumula en ciertas plantas, proporcionando beneficios como antioxidante, antiinflamatorio y quemopreventivo por la presencia de unas 25 selenoproteínas que participan en diversas acciones de bienestar, lactancia, desarrollo, reproducción y salud de la progenie. El objetivo de este estudio fue evaluar el contenido de Se en hojas de vegetales utilizados tradicionalmente en la alimentación guatemalteca. Se colectaron hojas de materiales cultivados para los mercados locales de nueve hierbas nativas (Amaranthus hybridus, Cnidoscolus aconitifolius, Crotalaria longirostrata, Dysphania ambrosioides, Lycianthes synanthera, Sechium edule, Solanum americanum, Solanum nigrescens y Solanum wendlandii) y dos introducidas de reconocido uso alimenticio (Moringa oleifera y Spinacia oleracea), se secaron en un horno de convección forzada para lograr una humedad < 10% y se digirieron 0.25 ± 0.02 g de hojas en una mezcla de ácido nítrico y ácido perclórico que se calentó hasta la digestión total de la materia. El Se fue determinado por el método de reflexión total de rayos X, utilizando un estándar interno de itrio (Y) el que se midió utilizando reflectores de cuarzo en un espectrómetro de reflexión total de rayos X. De todas las especies evaluadas, únicamente A. hybridus demostró cantidades cuantificables de Se. Se determinó que 100 g de materia vegetal seca de A. hybridus proporciona 0.355 mg de Se, por lo que su consumo semanal puede contribuir con el requerimiento de este micronutriente para un adulto.

Selenium (Se) is an essential element for the human being; it is in small amounts in the soil but it accumulates in certain plants, providing benefits as antioxidant, anti-inflammatory and chemopreventive, due to the presence of about 25 selenoproteins that participate in different welfare and development actions, lactation, reproduction and health of the progeny. This study aimed to assess Se content in leaves of nine native plants traditionally used in Guatemalan food (Amaranthus hybridus, Cnidoscolus aconitifolius, Crotalaria longirostrata, Dysphania ambrosioides, Lycianthes synanthera, Sechium edule, Solanum americanum, Solanum nigrescens and Solanum wendlandii) and two internationally uses herbs (Moringa oleifera, Spinacia oleracea). Se was determined by total reflection X-ray method. Plants were dried in a forced convection oven to constant weight, then were digested by weighing 0.25 ± 0.02 g of dry plant material with a mixture of nitric and perchloric acid, and warmed to achieve complete digestion. Using a yttrium (Y) internal standard were measured using quartz reflectors Spectrometer Total reflection X-ray. Of all native plant species tested, only A. hybridus there were measurable amounts of Se. It was determined that 100 g of dry plant material of A. hybridus provides 0.355 mg of Se, so its weekly consumption by an adult might contribute to satisfied the requirement of this microelement.
Descritores: Rubídio/administração & dosagem
Estrôncio/análise
Amaranthus/crescimento & desenvolvimento
-Plantas Comestíveis/classificação
Limites: Humanos
Masculino
Feminino
Responsável: GT49.1


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Id: biblio-1178624
Autor: Gutierrez Durán, María del Pilar; Mamani Mayta, Deysi Danitza; Gonzales Dávalos, Eduardo.
Título: Evaluación de los extractos de Amaranthus caudatus (Amaranto), Lupinus mutabilis (Tarwi) y Linum usitatissimum (Linaza), sobre la hiperglicemia inducida por aloxano en ratones / Evaluation of the extracts of Amaranthus caudatus (Amaranto), Lupinus mutabilis (Tarwi) and Linum usitatissimum (Linaza), on the Alloxane-induced hyperglycemia in mice
Fonte: Con-ciencia (La Paz);7(2):22-28, nov. 2019. ilus..
Idioma: es.
Resumo: La prevalencia de diabetes mellitus se incrementa en todo el mundo alcanzando a 592 millones de diabéticos el año 2035; así mismo la OMS proyecta que las muertes por diabetes se dupliquen entre los años 2005 y 2030 (OMS, 2016). En Bolivia la medicina tradicional reporta plantas medicinales a las cuales se les ha atribuido propiedades hipoglucemiantes, sin embargo en muchos casos no existen estudios científicos que avalen dichas propiedades. Este estudio se ha realizado con la finalidad de evaluar el efecto de los granos de Amaranthus caudatus (amaranto), Linum usitatissimum (Linaza) y Lupinus mutabilis (tarwi) sobre la hiperglicemia inducida por aloxano en animales de experimentación. Se administró por vía oral a ratones con hiperglicemia (glicemia > 180,6 mg/dl) una dosis de 2000 mg/kg de peso corporal de cada extracto hidro-etanólico obtenido de los granos de A. caudatus, L. usitatissimum y L. mutabilis. Los niveles de glucosa fueron medidos antes y después de la administración de los extractos. Los extractos hidro-etanolicos disminuyeron de forma significativa (p<0.05) la glucosa plasmática a las cuatro y dos horas después de su administración. El extracto de A. caudatus disminuyo la glucosa plasmática de 380 mg/dl a 260 mg/dl, el extracto de L. mutabilis disminuyo la glucosa plasmática de 310 mg/dl a 167 mg/dl, y el extracto de L. usitatissimum disminuyo la glucosa plasmática de 210,57 mg/dl a 168,14 mg/dl. Siendo el extracto de L. mutabilis el que presento mayor actividad sobre la hiperglicemia inducida por aloxano.

The prevalence of diabetes mellitus increases worldwide reaching 592 million diabetics in 2035; Likewise, the WHO projects that deaths due to diabetes double between the years 2005 and 2030 (WHO, 2016). In Bolivia, traditional medicine reports medicinal plants to which hypoglycaemic properties have been attributed, however in many cases there are no scientific studies to support these properties. This study was carried out with the purpose of evaluating the effect of Amaranthus caudatus (amaranth), Linum usitatissimum (Linseed) and Lupinus mutabilis (tarwi) on the hyperglycemia induced by alloxan in experimental animals. Mice with hyperglycemia (glycemia>10 mmol/L) were administered a dose of 2000 mg/kg body weight orally of each hydro-ethanolic extract obtained from the grains of A. caudatus, L. usitatissimum and L. mutabilis. Glucose levels were measured before and after the administration of the extracts. The hydro-ethanol extracts significantly decreased (p <0.05) the plasma glucose at four and two hours after its administration. The extract of A. caudatus decreased the plasma glucose from 380 mg / dl to 260 mg / dl, the extract of L. mutabilis decreased the plasma glucose from 310 mg / dl to 167 mg / dl, and the extract of L. usitatissimum decreased Plasma glucose from 210.57 mg / dl to 168.14 mg / dl. The extract of L. mutabilis was the one with the highest activity on the hyperglycemia induced by alloxan.
Descritores: Amaranthus
Diabetes Mellitus
Medicina Tradicional
-Plantas Medicinais
Plasma
Aloxano
Responsável: BO138.1 - Biblioteca Central


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Id: biblio-886707
Autor: WANG, CONGYAN; LIU, JUN; ZHOU, JIAWEI.
Título: N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions
Fonte: An. acad. bras. ciênc;89(2):919-926, Apr.-June 2017. tab.
Idioma: en.
Projeto: National Natural Science Foundation of China; . Open Science Research Fund of State Key Laboratory of State Key Laboratory of Soil and Sustainable Agriculture, China.
Resumo: ABSTRACT This study aims to determine the allelopathic potential of Amaranthus retroflexus (Ar) with different climatic zones on seed germination and growth of A. tricolor (At) treated with a gradient N addition. Ar leaf extracts only displayed significantly allelopathic potential on the underground growth of Ar but not the aboveground growth of At. The allelopathic potential of Ar leaf extracts on root length of At were enhanced under N addition and there may be a N-concentration-dependent relationship. The effects of the extracts of Ar leaves that collected from Zhenjiang on seed germination and growth of At may be higher than that collected from Jinan especially on root length of At under medium N addition. This reason may be the contained higher concentration of secondary metabolites for the leaves of plants that growths in high latitudes compare with that growth in low latitudes. This phenomenon may also partly be attributed to the fact that Ar originated in America and/or south-eastern Asia which have higher similarity climate conditions as Zhenjiang rather than Jinan. The allelopathic potential of Ar on seed germination and growth of acceptor species may play an important role in its successful invasion especially in the distribution region with low latitudes.
Descritores: Amaranthus/fisiologia
Amaranthus/química
Alelopatia/fisiologia
Nitrogênio/química
-Sementes/fisiologia
Sementes/química
Extratos Vegetais/química
China
Análise de Variância
Estatísticas não Paramétricas
Folhas de Planta/química
Responsável: BR1.1 - BIREME


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Id: biblio-1041290
Autor: Martínez, María Elena Calderón; Gaytán, Oswaldo Rey Taboada; López, Pedro Antonio; Torres, Enrique Ortiz.
Título: Improvement of nutritional quality of local dishes and their acceptance by children of different ages / Melhoria de pratos típicos: qualidade nutricional e sua aceitação por crianças de várias idades
Fonte: Rev. Nutr. (Online);31(6):603-615, Nov.-Dec. 2018. tab, graf.
Idioma: en.
Resumo: ABSTRACT Objective Food insecurity and child malnutrition are central topics in many food programs around the world; however, these indices do not diminish. The creation of strategies is necessary to increase the effectiveness of nutritional improvement programs. The objective of this research was to improve the nutritional quality of three local dishes included in the regular diet of the population by adding amaranth and to evaluate their acceptance by children from three communities in Tochimilco, Puebla, Mexico. Methods The study was carried out in three communities of "Tochimilco", Puebla, Mexico, in order to evaluate three local dishes: banana smoothie, beans and corn tortillas, which were chosen by mothers of the region in participative workshops on preparation of local dishes enriched with amaranth. Two sensory tests were applied: paired-comparison and hedonic scale to 208 and 210 children of preschool and scholar age, respectively. Results It was found that consumers showed similar preference for banana smoothie and beans enriched with amaranth compared to non-enriched dishes; while the amaranth enriched tortilla gained more preference in the different statistical tests and it was the dish with higher content of amino acids. Sensory attributes were similarly assessed and there were no significant differences among rural and urban communities and school year. Conclusion Children easily accept the addition of amaranth to the dishes they are accustomed to, as it does not change their food culture. It is possible to improve child nutrition by designing healthier dishes and incorporating them into the daily cooking of those who prepare the food.

RESUMO Objetivo A insegurança alimentar e a desnutrição infantil são temas centrais de muitos programas alimentares ao redor do mundo; no entanto, esses índices não diminuem. É preciso criar estratégias para aumentar a eficácia dos programas de desenvolvimento nutricional. A presente pesquisa teve como objetivo melhorar a qualidade nutricional de três pratos típicos da dieta normal da população local, adicionando amaranto às comidas típicas e avaliando a aceitação dele por crianças de três comunidades em Tochimilco, Puebla, México. Métodos O estudo foi realizado nas três comunidades para avaliar os três pratos típicos desta mesma região: vitamina de banana, feijão e as tortilhas de milho. Estas comidas foram escolhidas por mães da região em oficinas participativas de preparação de pratos locais enriquecidos com amaranto. Dois testes sensoriais foram aplicados: comparação pareada e escala hedônica para 208 e 210 crianças em idade pré-escolar e escolar, respectivamente. Resultados Verificou-se que os consumidores mostraram uma preferência semelhante pela vitamina de banana e feijão enriquecido com amaranto do que os mesmos não enriquecidos; enquanto a tortilha de milho enriquecida com amaranto ganhou mais preferência nos diferentes testes estatísticos e foi o prato com maior teor de aminoácidos. Os atributos sensoriais foram avaliados da mesma forma e não houve diferenças significativas entre as comunidades rurais e urbanas e as notas escolares. Conclusão As crianças aceitam facilmente a incorporação de amaranto nos pratos típicos da dieta delas, pois não repre-sentou nenhuma alteração da sua cultura alimentar. É possível melhorar a nutrição infantil, criando pratos mais saudáveis e incorporando-os na culinária cotidiana daqueles que preparam a comida.
Descritores: Transtornos da Nutrição Infantil
-Alimentos Fortificados
Criança
Pré-Escolar
Participação da Comunidade
Culinária
Amaranthus
México
Limites: Humanos
Masculino
Feminino
Pré-Escolar
Criança
Tipo de Publ: Ensaio Clínico
Responsável: BR13.3 - Biblioteca das Faculdades de Odontologia e Nutrição


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Id: lil-499693
Autor: Villanueva, Orlinda; Arnao Salas, Acela Inés.
Título: Purificación de una proteína de 35 kDA rica en lisina, de la fracción albúmina de Amaranthus Caudatus (kiwicha) / Purification of a 35kDA protein rich in lysine from Amaranthus caudatus (kiwicha) albumin fraction
Fonte: An. Fac. Med. (Perú);68(4):344-350, oct.-dic. 2007. graf, tab.
Idioma: es.
Resumo: Objetivo: Purificar una proteína rica en lisina de la fracción albúmina del grano de Amaranthus caudatus. Diseño: Estudio observacional descriptivo. Lugar: Centro de Investigación de Bioquímica y Nutrición, Facultad de Medicina, Universidad Nacional Mayor de San Marcos. Material biológico: Semillas de amaranto (Amaranthus caudatus), variedad Oscar Blanco. Intervenciones: Se empleó técnicas cromatográficas (filtración en gel) y electroforéticas (SDSûPAGE y electroelución) para purificar dicha proteína y determinar su peso molecular. Asimismo, se analizó su composición de aminoácidos por cromatografía líquida de alta performance (HPLC). Principales medidas de resultados: Aislamiento y purificación de una proteína de 35 kDa, rica en lisina. Resultados: Se aisló una proteína con peso molecular de 35 kDa, según PAGE-SDS, y la composición en aminoácidos esenciales fue similar a la proteína estándar recomendada por la Organización Mundial de la Salud - OMS, con un alto contenido de lisina (8,61 moles por ciento). Conclusiones: Se ha aislado y purificado una proteína de 35 kDa, rica en lisina de la fracción albúmina de Amaranthus caudatus, con una composición en aminoácidos esenciales comparable a lo recomendado por la OMS.

Objective: To purify a protein rich in lysine from Amaranthus caudatus seedsÆ albumin fraction. Design: Observational descriptive study. Setting: Biochemistry and Nutrition Research Center, Faculty of Medicine, Universidad Nacional Mayor de San Marcos. Biologic material: Amaranto (Amaranthus caudatus) seeds, Oscar Blanco variety. Interventions: We used both chromatographic (gel filtration) and electrophoretic (SDSPAGE and electroelution) techniques to purify a protein rich in lysine and to determine its molecular weight. The aminoacid composition of the lysine rich protein was obtained by high pressure liquid chromatography (HPLC). Main outcome measures: Isolation and purification of a 35 kDa protein rich in lysine. Results: We isolated a 35 kDa molecular weight protein as determined by SDSPAGE; the essential amino acid composition was similar to the standard protein recommended by the World Health Organization (WHO) with high content of lysine (8,61 moles per cent). Conclusions: We have isolated and purified a 35 kDa protein rich in lysine from Amaranthus caudatus albumin fraction with an essential amino acid composition similar to that recommended by WHO.
Descritores: Albuminas
Amaranthus
Aminoácidos
Aminoácidos Essenciais
Lisina
-Epidemiologia Descritiva
Estudos Observacionais como Assunto
Peru
Responsável: PE1.1 - Oficina Universitária de Biblioteca


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Silva, Joäo Andrade da
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Id: lil-546039
Autor: Leite, Joana Filomena Magalhães; Silva, João Andrade da; Gadelha, Tatiane Santi; Gadelha, Carlos Alberto; Siqueira Junior, José Pinto de.
Título: Nutritional value and antinutritional factors of foliaceous vegetable Talinum fruticosum
Fonte: Rev. Inst. Adolfo Lutz;68(3):341-345, set.-dez. 2009. tab.
Idioma: en.
Resumo: Talinum fruticosum Juss (L.) is an unconventional plant belonging to the family Portulacaceae; it is a herbaceous perennial plant that grows in tropical regions as a foliaceous vegetable. T.fruticosum leaves area source of fiber and minerals and they contribute to assemble the micronutrients for daily nutritional requirements. These plants supply the essential nutrients to the human organism; however, these plants contain antinutritinal factors such as lectins and tannins which may compromise their bioavailability. In the present study, the T. fruticosum leaves samples were investigated on proximate composition and anti nutritional factors. Samples were exposed to heat treatment for washing and for cooking for 10 min. These procedures neither signifcantly changed the carbohydrates and lipids contents, nor eliminated the hemagglutinating activity which is inactivated at 70 °C, although no effective reduction of tannin from the leaves was observed.
Descritores: Amaranthus
Valor Nutritivo
Plantas
Responsável: BR91.2 - Centro de Documentação


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Id: biblio-1023154
Autor: Silva, Paola; Pinheiro, Ana C; Rodriguez, Lorena; Figueroa, Victoria; Baginsky, Cecilia.
Título: Fuentes naturales de fitoesteroles y factores de producción que lo modifican / Natural sources of phytosterols and production factors that modify them
Fonte: Arch. latinoam. nutr;66(1):17-25, mar. 2016. tab, ilus.
Idioma: es.
Resumo: Actualmente los fitoesteroles son adicionados a los alimentos industrializados, lo que aumenta su costo y por lo tanto limita su consumo. Este manuscrito tiene como objetivo identificar alimentos que son una fuente natural de fitoesteroles, así como también analizar cómo el ambiente y el manejo productivo modifican su contenido, relacionando estos aspectos con la salud. Los fitoesteroles son compuestos presentes en las plantas con propiedades hipocolesterolémicas, que pueden contribuir a prevenir las enfermedades cardiovasculares. La ingesta diaria estimada de fitoesteroles varía entre 160 y 500 mg/día, sin embargo su acción beneficiosa se logra con consumos de 1500 mg a 2400 mg diarios. Las semillas de oleaginosas y de cereales son las mayores fuentes naturales de fitoesteroles. El amaranto es considerado un pseudocereal y entre los cereales tiene la mayor concentración de fitoesteroles con 178 mg/100 g, valor 5 veces superior al de la harina de trigo. El ambiente modifica el contenido de fitoesteroles de los alimentos, la sequía y temperaturas altas duplican su contenido en las semillas; la fertilización nitrogenada y la fecha de siembra pueden provocar cambios, pero se requieren más estudios al respecto. La selección de genotipos con mayor contenido de fitoesteroles y el estudio de la interacción genotipo ambiente, permitirá la identificación de aquellos genotipos con adaptación local para este carácter. El manejo productivo podrá aumentar la oferta de alimentos naturales ricos en fitoesteroles, contribuyendo a una mayor oferta de alimentos protectores de la salud(AU)

Currently phytosterols are added to processed foods, which increase their cost and therefore limits its use. This manuscript aims to identify foods that are a natural source of phytosterols, as well as analyze how the environment and production management modify its content, linking these aspects with health. Phytosterols are compounds found in plants with hypocholesterolemic properties, which may help prevent cardiovascular diseases. The estimated daily intake of phytosterols varies between 160 and 500 mg/day, but its beneficial effect is achieved with 1,500 to 2,400 mg daily consumption. Oil and cereal seeds are the largest natural sources of phytosterols. Amaranth is considered a pseudocereal and among the cereals has the highest concentration of phytosterols with 178 mg/100 g, value 5 times higher than wheat flour. Environment modifies phytosterol content in food, drought and high temperatures can double their content in seeds; nitrogen fertilization and planting date can cause changes, but more studies are needed. The selection of genotypes with higher phytosterol content and studying the genotype x environment interaction, allow the identification of those genotypes with local adaptation for this character. The production management will increase the supply of natural foods rich in phytosterols, contributing to a greater supply of health protective foods(AU)
Descritores: Fitosteróis/administração & dosagem
Amaranthus
Alimentos Geneticamente Modificados
Dislipidemias/etiologia
Alimentos Industrializados
-Doenças Cardiovasculares
Doença Crônica
Limites: Humanos
Masculino
Feminino
Tipo de Publ: Revisão
Responsável: VE557.1 - Biblioteca Fundación Bengoa



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