Quinoa: Nutritional, functional, and antinutritional aspects Filho, Antonio Manoel Maradini; Pirozi, Mônica Ribeiro; Borges, João Tomaz Da Silva ...
Critical reviews in food science and nutrition,
05/2017, Letnik:
57, Številka:
8
Journal Article
Recenzirano
We have prepared a review of the physical-chemical composition and the functional and anti-nutritional properties of quinoa (Chenopodium quinoa Willd.). It is a plant of the Chenopodiaceae family, ...originally from the Andean regions, adaptable to different types of soils and climatic conditions. Its composition has attracted the attention of scientific community for its high nutritional value, being rich in proteins, lipids, fibers, vitamins, and minerals, with an extraordinary balance of essential amino acids. It is also gluten-free, a characteristic that enables its use by celiac patients. In spite of all these attributes, quinoa is not widely used by consumers due to the high cost of imported grain and little knowledge of its benefits. More studies are required to increase knowledge about this "pseudo-cereal" to demonstrate its functional and nutritional benefits and to study its anti-nutritional effects, since it presents high commercial value and excellent nutritional quality.
Quinoa is a pseudocereal that has high protein quality and sorghum has phenolic compounds that give it a higher antioxidant capacity, however, its protein quality is low. Thus, this study aimed to ...evaluate the effect of the obtaining mixture of sorghum and quinoa flours on protein quality and antioxidant capacity in Wistar rats. The animals were allocated into five groups (n = 8): protein-free, control (casein) and experimental groups: sorghum flour, quinoa flour, and mixed sorghum/quinoa flour. At 21 days of the experiment, animals from the control and experimental groups received sodium fluoride (NaF) water for seven days to induce oxidative stress. The groups fed with sorghum, quinoa, and mixed flour sorghum/quinoa had, respectively, PER values of 0.23, 2.0, 1.5; NPR 1.82, 3.36, 2.88 and TD 60.22, 81.46, 66.82 and weight gain 1.75, 20.84 and 15.92. The total antioxidant capacity of serum increased in sorghum and mixed sorghum/quinoa flour groups, probably due to the higher amount of phenolic compounds. There was no change in the activities of the antioxidant enzymes superoxide dismutase, catalase, and the biomarker malondialdehyde. Thus, the mixed flour of sorghum/quinoa is an excellent alternative for the elaboration of products with better protein quality and high antioxidant capacity.
•Quinoa is rich in proteins with high quality.•Sorghum containing tannins has high antioxidant capacity, but poor protein quality.•Quinoa, sorghum and the mixture quinoa/sorghum flours were used in this work.•The obtaining mixture of quinoa/sorghum flour had good in vivo protein quality.•The obtaining mixture of quinoa/sorghum flour had high in vivo antioxidant capacity.
Sourdough production and consumption have significantly increased in recent years due to factors such as extended shelf life, nutritional benefits, particular flavour and the absence of food ...additives. These characteristics have attracted both consumers and baking industry. The advantages associated with sourdough fermentation are related to the microbial metabolism of sourdough, including lactic acid and acetic bacteria, Saccharomyces and non-Saccharomyces yeasts. This review explores how microbial diversity can impact the bakery industry, enhancing sourdough bread's safety, sensorial and nutritional properties. However, the standardization on sourdough production is still a challenge. Therefore, modulating the microbiota becomes a crucial strategy for scaling up the production of sourdough. Understanding how parameters such as temperature, pH, dough yield and flour type impacts on sourdough microbiota and bread quality is essential for improving sourdough bread production in an industrial context. In this work, we pose the following question: how to deliver sourdough with appropriate characteristics for the bakery industry? The answer may be provided by microbiota.
Production of dulce de leche: The effect of starch addition Silva, Fernanda Lopes da; Ferreira, Hiani Aparecida Lima; Souza, Alisson Borges de ...
Food science & technology,
June 2015, 2015-06-00, Letnik:
62, Številka:
1
Journal Article
Recenzirano
Odprti dostop
This study evaluated the effect of addition of modified starch on the characteristics of dulce de leche, being conducted in two phases. In the initial phase, starches were evaluated for their ability ...to provide viscosity in model solutions representing the composition of dulce de leche during processing, thus evaluating the effect of solid concentration, which occurs during production, on the ability of starches to increase viscosity in simulated conditions of heat treatment and agitation promoted by Rapid Visco Analyser (RVA). It has been chosen 2 starches and 2 concentrations of soluble solids from the results of the initial phase, being employed as a criterion of choice starches with the highest viscosities at each solid concentration processing phase. In the second stage, 6 treatments were applied in triplicate, in which it's been determined the chemical composition, the instrumental color, texture profile and yield. Analyses were performed on crystallization of lactose during storage. According to the established conditions of the experiment, the starch configures itself as an important optional ingredient for the production of dulce de leche providing then longer shelf life without change in texture, composition, yield and sensory characteristic.
•Dulce de leche was produced by two different types of starch.•Dulce de leche composition, crystallization, yield, color and texture were determined.•Dulce de leche sensory acceptance was determined.•The presence of starch didn't affect yield, texture and composition of the product.•The presence of starch did affect color, crystallization and sensory acceptance.
O objetivo deste trabalho foi determinar as características da secagem de bagaço de uva fermentado em secador com ar aquecido, avaliar a capacidade descritiva de conhecidos modelos matemáticos de ...secagem em camada delgada, e obter os valores de difusividade efetiva e a energia de ativação. Os experimentos de secagem foram conduzidos a 50, 60, 70, 80 e 90ºC, com a velocidade do ar de secagem de 1,0 m s-1. Foram comparados dez diferentes modelos matemáticos de secagem em camada delgada, de acordo com os valores do coeficiente de determinação (R²), qui-quadrado (χ²), raiz do quadrado médio residual (RQMR) e erro médio relativo (P), estimados pelas curvas de secagem. Os efeitos da temperatura de secagem nos coeficientes e nas constantes foram preditos pelos modelos de regressão. O modelo de Page modificado foi selecionado para representar o comportamento da secagem em camada delgada de bagaço de uva. Os valores médios da difusividade efetiva variaram de 1,0091 x 10-9 m² s-1 a 3,0421 x 10-9 m² s-1 nas temperaturas avaliadas. A dependência da difusividade efetiva pela temperatura foi descrita pela equação de Arrhenius, com o valor de energia de ativação de 24,512 kJ mol-1.
The objective of this work was to determine the drying characteristics of fermented grape pomace in a hot air-dryer, to evaluate the descriptive capacity of known mathematical models of thin-layer drying, and to establish the values of effective diffusivity and activation energy. Drying experiments were conducted at 50, 60, 70, 80 and 90ºC, with 1.0 m s-1 air-drying velocity. Ten different mathematical models for thin-layer drying were compared, according to the values of coefficient of determination (R²), chi-square (χ²), residual mean square root (RMSR), and relative mean error (P) estimated by the drying curves. The effects of drying temperature on the coefficients and constants were predicted by the regression models. The modified Page model was selected to represent the behavior of thin-layer drying of grape pomace. The mean values of effective diffusivity varied from 1.0091 x 10-9 m² s-1 to 3.0421 x 10-9 m² s-1, at the evaluated temperatures. Effective diffusivity dependence on temperature was described by the Arrhenius equation, with activation energy of 24.512 kJ mol-1.
O presente trabalho teve por objetivo estudar o efeito da utilização de farinha mista de trigo e linhaça integral nas proporções de 100:0 (F0), 90:10 (F10) e 85:15 (F15) nas características ...físico-químicas e sensoriais de pão de sal. A utilização de 10% e 15% de farinha de linhaça alterou a composição química dos pães, com destaque para o aumento nos teores de fibra alimentar e lipídios. Para esses pães seria permitida a alegação de "alto teor de fibras", segundo a legislação brasileira. Esses pães apresentaram coloração mais escura, bem como redução de volume geral e específico e maior firmeza, indicando enfraquecimento da estrutura proteica da massa, com prejuízo para a capacidade de retenção de gases provenientes da fermentação. No teste sensorial (atributos aroma, cor, aparência, textura e impressão global), os pães F10 e F15 obtiveram escores localizados entre os termos "gostei moderadamente" e "gostei muito", indicando boa aceitação para ambas as formulações. Os avaliadores apresentaram atitude positiva quanto à intenção de compra, tanto para F10 quanto para F15. Apesar de promover diminuição da qualidade tecnológica dos pães de sal, a incorporação de até 15% de farinha integral de linhaça mostrou-se promissora para sua comercialização em razão da aceitação do produto e seu conteúdo em componentes nutricionais.
Campos elétricos pulsados de alta intensidade (CEPAI) constituem um método não-térmico de conservação para alimentos em substituição à pasteurização tradicional. Em comparação ao processamento ...térmico, os CEPAI, além de serem eficientes na eliminação de micro-organismos e na inativação de enzimas, também minimizam as perdas de sabor, cor, textura, nutrientes e componentes termolábeis dos alimentos. O objetivo desse trabalho foi levantar dados bibliográficos atuais sobre o tema CEPAI, abordando: definição do processo, instalação experimental, efeito da ruptura dielétrica do alimento, efeito sobre micro-organismo, enzimas e constituintes dos alimentos. Os dados encontrados na literatura apontam o tratamento por CEPAI como alternativa promissora para a conservação de alimentos, podendo ser utilizado como tecnologia única ou como complemento aos processamentos térmicos.
Pulsed electric fields of high intensity (HIPEF) is a non-thermal food conservation to replace traditional thermal pasteurization. Compared to thermal processing, the HIPEF as well as being effective in removing microorganisms and inactivate enzymes also minimize the loss of flavor, color, texture, nutrients and labile components of food. The aim of this work was to gather bibliographic data current HIPEF on the subject, covering: experimental setup, effects of dielectric breakdown of food, effect on microorganisms, enzymes and constituents of food. The data found in the literature indicate treatment of HIPEF as a promising alternative for food conservation and it could be used as a single technology or in addition to thermal processing.
Campo elétrico pulsado Pulsed electric field Mirella Lima Binoti; Afonso Mota Ramos; Luciano José Quintão Teixeira ...
Ciência rural,
05/2012, Letnik:
42, Številka:
5
Journal Article
Recenzirano
Odprti dostop
Campos elétricos pulsados de alta intensidade (CEPAI) constituem um método não-térmico de conservação para alimentos em substituição à pasteurização tradicional. Em comparação ao processamento ...térmico, os CEPAI, além de serem eficientes na eliminação de micro-organismos e na inativação de enzimas, também minimizam as perdas de sabor, cor, textura, nutrientes e componentes termolábeis dos alimentos. O objetivo desse trabalho foi levantar dados bibliográficos atuais sobre o tema CEPAI, abordando: definição do processo, instalação experimental, efeito da ruptura dielétrica do alimento, efeito sobre micro-organismo, enzimas e constituintes dos alimentos. Os dados encontrados na literatura apontam o tratamento por CEPAI como alternativa promissora para a conservação de alimentos, podendo ser utilizado como tecnologia única ou como complemento aos processamentos térmicos.Pulsed electric fields of high intensity (HIPEF) is a non-thermal food conservation to replace traditional thermal pasteurization. Compared to thermal processing, the HIPEF as well as being effective in removing microorganisms and inactivate enzymes also minimize the loss of flavor, color, texture, nutrients and labile components of food. The aim of this work was to gather bibliographic data current HIPEF on the subject, covering: experimental setup, effects of dielectric breakdown of food, effect on microorganisms, enzymes and constituents of food. The data found in the literature indicate treatment of HIPEF as a promising alternative for food conservation and it could be used as a single technology or in addition to thermal processing.
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