Chromatic, Phenolic and Antioxidant Properties of Sorghum bicolor Genotypes

Chromatic, phenolic and antioxidant properties were evaluated in ten sorghum genotypes grown in Nuevo León, México. Lightness, chroma and hue angle ranged from 64 to 83, 12 to 20 and 61 to 82 respectively, indicating that colour of the samples were located in the gray orange-yellow zone of the hue circle. Based on these results, samples were classified in three colour groups being Very Soft Orange, Slightly Desaturated Orange and Grayish Orange. Results in phenolics ranged from 796 to 15,949, 175 to 12,674 and 193 to 25,780 μgCE g-1 in total phenolics by Folin-Ciocalteu, total flavonoids by Aluminum Chloride and condensed tannins by Vanillin-HCl respectively. On the other hand, antioxidant capacity ranged from 1.20 to 93.83, 30.25 to 156.08 and 2.62 to 98.50 CmolTE g-1 in 2,2-diphenyl-1-picrylhydrazyl, 3-ethyl-benzothiazoline-6-sulfonic acid and Ferric Reducing Antioxidant Power respectively. Significant differences (pE0.05) were observed in statistical analysis for both individual and group colour samples in chromatic, phenolics and antioxidant activity evaluations, showing ‘Rox Orange’ genotype and Grayish Orange colour group the highest levels

Nutritional and technological properties of Tepary bean (Phaseolus acutifolius) cultivated in Mexican Northeast

The nutritional, cooking and technological properties of the Tepary bean (TB) cultivated in Mexican northeast comparing to two common beans varieties (Pinto Americano and Black Jamapa) were evaluated in this study. Nutritional parameters evaluated of TB resulted significantly different from common beans varieties analysed, except lipid fraction. Cooking times of soaked (4 and 8 h) and non-soaked varieties varied significantly; TB shows between 55.1–80.49 min by cooking time. The textural profile analysis (TPA) of TB showed a significant reduction of hardness, chewiness and adhesiveness in soaked compared to non-soaked. In addition, TB presented a similar behaviour to Pinto Americano in TPA non-soaked and cooked and soaked 8h and cooked, except to adhesiveness. Technological properties of TB and resistant and non-resistant starch content showed significant differences between species. Due to, TB has nutritional, cooking and technological properties comparable to other edible legumes as common bean, mainly Pinto Americano variety

Physicochemical Parameters, Mineral Composition, and Nutraceutical Properties of Ready-to-Drink Flavored-Colored Commercial Teas

The physicochemical parameters, mineral composition, and nutraceutical properties of ready-to-drink flavored-colored commercial teas were analyzed in the present study. The pH of samples was slightly acidic (3.72 to 4.11), titratable acidity was low (0.092 to 0.174%), and color parameters were wide variable (pink, yellow, brown, and red). Citrus-flavored tea obtained the highest content of manganese (0.281mg·L−1), zinc (0.069mg·L−1), magnesium (2.92mg·L−1), potassium (62.65mg·L−1), and sodium (271.74mg·L−1), while lemon-, peach-, and blueberry-flavored teas obtained the highest levels of copper (0.035mg·L−1), iron (0.246mg·L−1), and calcium (18.21mg·L−1), respectively. Citrus, lemon-, sangria-, and rose petal-flavored teas obtained the highest content in total phenols (211.56mg·L−1), total flavonoids (65.46mg·L−1), total catechins (640.79mg·L−1), and total anthocyanins (640.79mg·L−1), respectively. Lemon- and rose petal-flavored teas showed the highest and lowest antioxidant capacity levels in DPPH (1096.00 to 118.77μmolTE·L−1), ABTS (1048.84 to 232.00μmolTE·L−1), and FRAP (1269.20 to 147.70μmolTE·L−1) assays. The levels of sodium reported in labels of all samples were lower than data obtained in our analysis. Alsothelevelsobservedfortotalphenolsinblueberry-,citrus-,androsepetal-flavoredteaswerelowerthanouranalysis,buttotal phenolsoflemon-,peach-,andsangria-flavoredteaswerehigherthanthecontentreportedintheirlabels.Theresultsobtainedin thepresentworkgiveinformationtoconsumersforchoosingflavored-coloredready-to-drinkteabasedonthephysicochemical, nutritional, and nutraceutical properties

Effect of laccase from Trametes maxima CU1 on physicochemical quality of bread

The effect of laccase from Trametes maxima CU1 on physicochemical quality of bread was evaluated. Laccase treatment was 0.05% lower than the control in height, 0.33% higher in weight loss and reduced 17.71% the hardness of bread. In color, treatment with laccase was 18.72, 8.51 and 0.61% higher in L*, h, and C*, respectively. Chemical parameters of laccase treatment 12.00, 14.10 and 41.62% were higher than control in soluble arabinoxylans, protein and total phenols content, respectively. Based on the results obtained in the present study, laccase from T. maxima CU1 can be considered a good option for extraction and application as improver of the physicochemical quality of bread at industrial level

Ácidos fenólicos con actividad antioxidante en salvado de maíz y salvado de trigo

Soluble and bound phenolic acids were obtained from maize and wheat bran and the level of total phenols were determined (Folin-Ciocalteu), phenolic acids (HPLC), antioxidant activity (DPPH, ORAC) and the presence of diferulic acids (UV spectra). The concentrations of total phenols, ferulic acid, and coumaric acid ranged from 1 637 to 9 718 µg EAF g-1, from 12 to 4 527 µg g-1 and from 7 to 664 µg g-1, while the antioxidant activity µmol ET g-1 acids 8-8', 8-5', 5-5' and 8-0-4' was identified in the bound fractions. All fractions presented significant levels of total phenols, phenolic acids and antioxidant activity, the bound fraction of maize bran being the one that presented the highest concentrations.Ácidos fenólicos solubles y ligados, fueron obtenidos de salvado de maíz y trigo, en los que se determinaron los niveles de fenoles totales (Folin-Ciocalteu), ácidos fenólicos (HPLC), actividad antioxidante (DPPH, ORAC) y presencia de ácidos diferúlicos (espectros UV). Las concentraciones de fenoles totales, ácido ferúlico y ácido cumárico fueron de 1 637 a 9 718 µg EAF g-1, de 12 a 4 527 µg g-1 y de 7 a 664 µg g-1, mientras que la actividad antioxidante fue de 9.52 a 64.14 % de inhibición de DPPH y de 11.46 a 67.09 µmol ET g-1 en ORAC. Se identificó la presencia de los ácidos diferúlicos 8-8', 8-5', 5-5' y 8-0-4' en las fracciones ligadas. Todas las fracciones presentaron niveles importantes de fenoles totales, ácidos fenólicos y actividad antioxidante, siendo la fracción ligada de salvado de maíz la que presentó las mayores concentraciones

Contribution of bound phenolic compounds to the total phenol content and antioxidant capacity of oat (Avena sativa) grain fractions

Bound phenolics from oat grain endosperm-germ and bran fractions contributed to 73.30–82.22% of total phenol content and 59.33–66.83%, 67.86–75.74%, and 59.02–67.86% of total antioxidant capacity in ABTS-AC, DDPH-AC, and FRAP-AC, respectively. Bound phenolics form the bulk of total phenol content and antioxidant capacity, especially in bran fraction.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Dieta cetogénica como alternativa en el tratamiento de la obesidad: un estudio de revisión bibliográfica

Introducción. El reciente interés del uso de la dieta cetogénica como alternativa al tratamiento de obesidad, ha despertado la necesidad en los profesionales de la salud de volver a examinar los posibles beneficios de este estilo de alimentación. Objetivo: Resumir los antecedentes y sintetizar las diferentes aplicaciones de dietas cetogénicas en el tratamiento de la obesidad a través de las publicaciones científicas. Material y Método: Se usaron tres bases de datos (PubMed, Google Scholar y Clinical Trials). Los términos usados en la búsqueda fueron dieta cetogénica, obesidad, cuerpos cetónicos, entre otros. Se combinaron con operadores lógicos como cetólisis, oxidación de ácidos grasos, regulación hormonal, saciedad, ejercicio, entre otros. Resultados: Se consideraron para la revisión un total de 23 artículos de reciente publicación con ensayos clínicos y aplicados en modelos animales. Los artículos excluidos no cumplieron con criterios de los niveles de evidencia y de la guía PRISMA. Conclusión: Aunque se han demostrado los numerosos beneficios de las dietas cetogénicas, la utilización debe ir acompañada de un asesoramiento dietético y no abusar de su uso. El modelo de evolución de la nutrición es integrar e individualizar los diversos factores dietéticos que puedan contribuir a mejorar el estilo de vida a largo plazo. Palabras Clave: Dieta cetogénica, cuerpos cetónicos, obesidad