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1.
J Sci Food Agric ; 103(11): 5242-5252, 2023 Aug 30.
Artigo em Inglês | MEDLINE | ID: mdl-37029992

RESUMO

BACKGROUND: Protein-pectin conjugates, obtained through a controlled Maillard reaction in blends of precursors, are studied for their contribution to improving the emulsifying and thermal properties of proteins. The objective was to obtain a conjugate between whey protein concentrate (WPC) and non-conventional pectins extracted in acid (acid tomato pectin, ATP) and aqueous medium (water tomato pectin, WTP) from industrialized tomato residues (tomato waste, TW), characterize the conjugates and study their emulsion properties. The Maillard reaction was carried out at 60 °C and 75% relative humidity in blends with 2:1 proportions; 1:1 and 1:2 (mprotein :mpectin ) for 3, 6 and 12 days. Conjugates were compared concerning treated and untreated WPC. RESULTS: The WPC-ATP conjugate showed significant increases in color difference (ΔE). The electrophoresis profile of the conjugates showed diffuse bands of molecular weight between 37 and 250 kDa and a reduction in the intensity of bands characteristic of WPC (α-lactalbumin and ß-lactoglobulin). Thermal analysis showed an increase in the peak temperature and a reduction in the enthalpy change in protein denaturation, associated with the formation of conjugates. The infrared spectroscopy of the conjugates, in the amide III zone (1300-1100 cm-1 ), indicated an increase in the relative peak area associated with the unfolding and exhibition of the hydrophobic zones of the WPC fraction. The emulsions formulated with the conjugates showed a significant increase in the emulsifying stability index (ESI) (P < 0.05) concerning the treated and untreated WPC emulsions. CONCLUSION: The formation of conjugates increased the emulsifying properties and improved the thermal stability of WPC, showing an innovative and alternative food ingredient too. © 2023 Society of Chemical Industry.


Assuntos
Pectinas , Solanum lycopersicum , Proteínas do Soro do Leite/química , Pectinas/química , Emulsões/química , Trifosfato de Adenosina
2.
Actual. nutr ; 21(3): 93-102, Julio-Septiembre de 2020.
Artigo em Espanhol | LILACS | ID: biblio-1282383

RESUMO

Introducción: en Argentina no hay disponible información sistemática sobre el contenido de polifenoles de sus alimen-tos. Se desarrolló una base de datos de polifenoles, ARFenol-Foods, que recopila información de publicaciones científicas e informes de datos de contenido de polifenoles en alimentos locales generados analíticamente en laboratorios en diferen-tes regiones del país. Objetivos: el objetivo de este trabajo es la difusión, uso y ges-tión de la base de datos ARFenol-Foods. Materiales y métodos: la base de datos es una herramienta electrónica abierta a través de una interfaz web fácil de usar, que permite consultas simples o complejas. Está disponible en línea a través de un sitio web de INSIBIO: http://insibio.org.ar/ar-fenoles-app/. Incluyó el contenido de polifenoles totales y los subgrupos informados en la bibliografía. Resultados: el programa proporciona la entrada a través del ali-mento común y esto conduce a otra ventana donde se encuen-tran los diferentes registros con una breve descripción, el conteni- do de polifenoles y el origen de los datos. En el caso de las papas o tomates andinos, no sólo no hay información en las bases de datos internacionales, sino que también es importante determinar la variabilidad dentro del mismo grupo debido a la gran biodiversi-dad. La base de datos contiene información de 25 variedades y 14 accesiones respectivamente; es posible obtener el rango y el valor medio de ellos. Además, el software permite comparar los datos entre diferentes bases de datos disponibles. Conclusiones: la base de datos ARFenol-Foods es útil para los científicos de alimentos, fabricantes de alimentos, dietistas y profesionales de la salud, entre otros usuarios, para estimar la ingesta de compuestos fenólicos totales y su contribución relacionada de alimentos en las poblaciones de la región.


Assuntos
Base de Dados , Polifenóis/análise , Análise de Alimentos , Gerenciamento de Dados , Argentina
3.
Nutrients ; 12(1)2019 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-31877703

RESUMO

Salt consumption in many countries of the world exceeds the level recommended by WHO (5 g/day), which is associated with negative effects on health. Public health strategies to achieve the WHO's objectives include salt content monitoring, improved nutritional labelling and product reformulation. This study aimed to determine the sodium content in street food (SF), fast foods (FF) and artisanal foods (AF) of the Northwest of Argentina, which is not regulated. Moisture, ash and sodium were determined according to the Official Methods of Analysis (AOAC) in 189 samples from each of the three categories. The average and range values were: SF 520 (R: 74-932); FF 599 (R: 371-1093) and AF 575 (R: 152-1373) mg Na/100 g. Thus, general sodium content is high, which means that the consumption of a serving from most of the studied foods leads to an individual exceeding the recommended daily intake values. This study contributes to the knowledge of sodium content in evaluated foods and its contribution to the population intake. This reinforces the importance of implementing new public policies and regulations, advising consumers to check food nutritional labels andselect foods lower in salt content, raising food manufacturers' awarenessabout the importance of reducing sodium content in foods they produce and in public health.


Assuntos
Análise de Alimentos , Cloreto de Sódio na Dieta/administração & dosagem , Cloreto de Sódio/química , Adulto , Argentina , Fast Foods/análise , Feminino , Rotulagem de Alimentos , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos Nutricionais , Saúde Pública , Recomendações Nutricionais , Adulto Jovem
4.
Arch. latinoam. nutr ; Arch. latinoam. nutr;65(4): 234-242, dic. 2015. ilus, tab, graf
Artigo em Espanhol | LILACS, LIVECS | ID: lil-783958

RESUMO

El objetivo del trabajo fue revalorizar el cultivo de la quínoa (Chenopodium quinoa Willd) y promover su difusión entre los productores de la zona andina del noroeste argentino. Se utilizó un método sencillo para la obtención de hojuelas cocidas de quínoa variedad Real Rosada, aplicable a las condiciones climáticas de la región. El proceso incluye desaponificación del grano utilizando el escarificado y lavado en forma combinada. Se logró disminuir el contenido de saponinas hasta 0,1%, nivel aceptable para consumo humano. Se adaptó un método para cuantificar las saponinas, el cual aportó una alternativa para su extracción y purificación para otros usos. Se determinó la cinética de secado del grano cocido para ajustar la humedad para el laminado. El coeficiente efectivo de difusión determinado para el secado del grano fue 4,49x10-05 m2/s. Las hojuelas obtenidas se secaron hasta humedad de equilibrio. El producto final presentó la siguiente composición: proteínas 11,7%, lípidos 2,1%, hidratos de carbono totales 71,7%, cenizas 2,5% y agua 12,0%. Las hojuelas presentaron características nutricionales de Digestibilidad 89,89% y Valor Biológico 85,07%. Debido a todas las características mencionadas este producto es apto para consumo directo o para incluirlo en alimentos formulados y representa un aporte al agregado de valor de la cadena productiva de cultivos andinos(AU)


Process of elaboration of cooked quinoa flakes. The purpose of this work was to revalue the quinoa (Chenopodium quinoa Willd) cultivation and promote their diffusion among producers in the Andean region of northwestern Argentina. Quinoa Real Rosada grains, variety reintroduced in the region was used. It was used a simple process to obtain cooked quinoa flakes, applicable to the climatic conditions of the region. The process includes grain desaponification using the scarifying and washing combined. It was possible to reduce the content of saponins to 0.1%, acceptable level for human consumption. A method for quantifying the saponins was adapted, which provided an alternative for its extraction and purification for other uses. The kinetics of drying of cooked grain was determined in order to adjust moisture to the laminate. The effective diffusion coefficient determined for grain drying was 4,49x10-05 m2/s. Obtained flakes was dried to equilibrium moisture. The final product had protein content 11.7%, fat 2.1%, total carbohydrates 71.7%, ash 2.5% and 12.0% water. The flakes showed Digestibility 89.89% and Biological value 85.07% Because of all the characteristics mentioned this product is suitable for direct consumption or for inclusion in formulated foods and represents a contribution to add value to the productive chain of Andean crops(AU)


Assuntos
Saponinas , Carboidratos , Proteínas , Chenopodium quinoa , Manipulação de Alimentos , Fibras na Dieta , Fenômenos Químicos
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