International Journal of Food Sciences and Nutrition, 2009
The present work aimed to evaluate the effectiveness of whole grain consumption in preventing col... more The present work aimed to evaluate the effectiveness of whole grain consumption in preventing colorectal cancer. A systematic review with meta-analysis of 11 cohort studies was carried out. The age group of the population studied (1,719,590 participants) was between 25 and 76 years of age. The review evaluated the relative risks with the Cox proportional hazard model. The period of study varied from 6 to 16 years, where 7,745 persons developed colorectal cancer during the follow-up period. In the multivariate analysis, the highest quintile relative risk was 0.94 (95% confidence interval, 0.85-1.03), whereas that for the lowest quintile was 0.96 (95% confidence interval, 0.88-1.04). The location of tumors was also evaluated, with tumors in the colon demonstrating a relative risk of 0.93 (95% confidence interval, 0.83-1.02) and tumors in the recto a relative risk equal to 0.89 (95% confidence interval, 0.79-1.00). In this multivariate analysis, consumption of whole grains was inversely associated with the risk of developing colorectal cancer.
The chemical composition of oats has been poorly studied in Brazil. Therefore, the objective of t... more The chemical composition of oats has been poorly studied in Brazil. Therefore, the objective of this study was to characterize the main chemical constituents of Brazilian oat cultivars. This knowledge is essential for theutilization of this cereal in balanced diets, specially for individuals with high blood cholesterol, where the β-glucans contribute to it's reduction. The analyzed genotipes were recommended by the Brazilian Oat Research Commission. The cultivars studied (CTC3, UFRGS7, UFRGS14, UPF7 and UPF16) showed high levels of protein (16,8%), lipids (6,84%) and β-glucans (4,89%). The aminoacid profil of these samples was limiting only for lyisine, threonine and isoleucine. The other aminoacids had similar values to those recomended by the FAO. It was observed that all the studied variables suffered changes according to the interactions between genotype, locality and year of production. Cultivars UFRGS14, UFRGS7 and UPF16 were differentiated for their high contents of protein, lipids and β-glucans, respectively.
The decortication behavior of random mating populations of pearl millet and cultivars of grain so... more The decortication behavior of random mating populations of pearl millet and cultivars of grain sorghum was studied with Shepherd's modification of the Udy cyclone mill. Sorghum bran was removed in large flakes during decortication, and pearl millet bran was removed in smaller flakes. Neither sorghum nor millet was degermed during decortication. Millets grown in Sudan required less time to decorticate than Kansas-grown millets. Fractionation of the decorticate and the decorticated grain, using screens and a seed blower, indicated that differences in decortication rate were largely related to endosperm softness
The purpose of this work was to study the effect of grain morphology of oats on their industrial ... more The purpose of this work was to study the effect of grain morphology of oats on their industrial yield. The five cultivars studied: CTC3, UFRGS7, UFRGS14, UPF7 and UPF16 were grown in three localities with different soil and climate conditions, for two consecutive years. The parameters evaluated in the oat samples before and after dehulling were grain size and shape (by image analysis), comparing them to industrial yield, weight of a thousand kernels and hectoliter weight. The results showed that image analysis of oat samples (with hulls), does not have any relation to industrial yield, different from what was observed with groat samples (dehulled). Industrial yield varied according to genotype, locality and year, while area, minimum and maximum diameters and grain shape were only affected by the genetic factor. It was observed that longer grains (UPF16) had the highest industrial yield, differently to rounder and shorter grains (UFRGS14) which had a lower yield due to the ease of breakage during hulling; the smallest grains also gave a low industrial yield.
... Héctor SUÁREZ-MAHECHA1,5, Alicia de FRANCISCO2, Luiz Henrique BEIRÃO2, Jane Mara BLOCK2, Adri... more ... Héctor SUÁREZ-MAHECHA1,5, Alicia de FRANCISCO2, Luiz Henrique BEIRÃO2, Jane Mara BLOCK2, Adriana SACCOL4, Sandra PARDO-CARRASCO3,5 ... ômega-3 para a nutrição humana, e de como a presença desses ácidos em peixes beneficia o homem, por tornar o ...
International Journal of Food Sciences and Nutrition, 2009
The present work aimed to evaluate the effectiveness of whole grain consumption in preventing col... more The present work aimed to evaluate the effectiveness of whole grain consumption in preventing colorectal cancer. A systematic review with meta-analysis of 11 cohort studies was carried out. The age group of the population studied (1,719,590 participants) was between 25 and 76 years of age. The review evaluated the relative risks with the Cox proportional hazard model. The period of study varied from 6 to 16 years, where 7,745 persons developed colorectal cancer during the follow-up period. In the multivariate analysis, the highest quintile relative risk was 0.94 (95% confidence interval, 0.85-1.03), whereas that for the lowest quintile was 0.96 (95% confidence interval, 0.88-1.04). The location of tumors was also evaluated, with tumors in the colon demonstrating a relative risk of 0.93 (95% confidence interval, 0.83-1.02) and tumors in the recto a relative risk equal to 0.89 (95% confidence interval, 0.79-1.00). In this multivariate analysis, consumption of whole grains was inversely associated with the risk of developing colorectal cancer.
The chemical composition of oats has been poorly studied in Brazil. Therefore, the objective of t... more The chemical composition of oats has been poorly studied in Brazil. Therefore, the objective of this study was to characterize the main chemical constituents of Brazilian oat cultivars. This knowledge is essential for theutilization of this cereal in balanced diets, specially for individuals with high blood cholesterol, where the β-glucans contribute to it's reduction. The analyzed genotipes were recommended by the Brazilian Oat Research Commission. The cultivars studied (CTC3, UFRGS7, UFRGS14, UPF7 and UPF16) showed high levels of protein (16,8%), lipids (6,84%) and β-glucans (4,89%). The aminoacid profil of these samples was limiting only for lyisine, threonine and isoleucine. The other aminoacids had similar values to those recomended by the FAO. It was observed that all the studied variables suffered changes according to the interactions between genotype, locality and year of production. Cultivars UFRGS14, UFRGS7 and UPF16 were differentiated for their high contents of protein, lipids and β-glucans, respectively.
The decortication behavior of random mating populations of pearl millet and cultivars of grain so... more The decortication behavior of random mating populations of pearl millet and cultivars of grain sorghum was studied with Shepherd's modification of the Udy cyclone mill. Sorghum bran was removed in large flakes during decortication, and pearl millet bran was removed in smaller flakes. Neither sorghum nor millet was degermed during decortication. Millets grown in Sudan required less time to decorticate than Kansas-grown millets. Fractionation of the decorticate and the decorticated grain, using screens and a seed blower, indicated that differences in decortication rate were largely related to endosperm softness
The purpose of this work was to study the effect of grain morphology of oats on their industrial ... more The purpose of this work was to study the effect of grain morphology of oats on their industrial yield. The five cultivars studied: CTC3, UFRGS7, UFRGS14, UPF7 and UPF16 were grown in three localities with different soil and climate conditions, for two consecutive years. The parameters evaluated in the oat samples before and after dehulling were grain size and shape (by image analysis), comparing them to industrial yield, weight of a thousand kernels and hectoliter weight. The results showed that image analysis of oat samples (with hulls), does not have any relation to industrial yield, different from what was observed with groat samples (dehulled). Industrial yield varied according to genotype, locality and year, while area, minimum and maximum diameters and grain shape were only affected by the genetic factor. It was observed that longer grains (UPF16) had the highest industrial yield, differently to rounder and shorter grains (UFRGS14) which had a lower yield due to the ease of breakage during hulling; the smallest grains also gave a low industrial yield.
... Héctor SUÁREZ-MAHECHA1,5, Alicia de FRANCISCO2, Luiz Henrique BEIRÃO2, Jane Mara BLOCK2, Adri... more ... Héctor SUÁREZ-MAHECHA1,5, Alicia de FRANCISCO2, Luiz Henrique BEIRÃO2, Jane Mara BLOCK2, Adriana SACCOL4, Sandra PARDO-CARRASCO3,5 ... ômega-3 para a nutrição humana, e de como a presença desses ácidos em peixes beneficia o homem, por tornar o ...
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