Biomedical subjects

M H Gómez

Publications and source records attributed to M H Gómez.

10 recordsLinked to original sources

PubMed1998

A scale for assessing sleep hygiene: preliminary data.

No reliable measure exists for assessing the nature and scope of adherence or nonadherence to effective sleep hygiene practices. This report details the creation and empirical validation of the Sleep Hygiene Self-test. 52 combat veterans, patients in a treatment program for PTSD, completed the 30-item self-test prior to and after their participation in 5 wks. of group therapy for sleep hygiene. Analysis indicated good internal consistency and suitability as a pre-posttest measure.

Adult↗

PubMed1993

The tortilla making properties of two improved maicillo cultivars from Honduras.

Grains of two improved maicillo hybrids (Sorghum bicolor (L) Moench) and their criollo (Landrace) counterparts grown at two farmsites in Honduras were lime-cooked and processed into table tortillas. Kernels from the criollos were less dense and softer than kernels from the improved cultivars. The improved maicillos had straw or red plant and glume colors while the criollos were less dense and softer than kernels from the improved cultivars. The improved maicillos had straw or red plant and glume colors while the criollos had purple colored plants with black or purple glumes. The soft textured criollo kernels required less cooking than their harder improved counterparts. Nixtamals cooked to contain 53-55% moisture were the most suitable for processing into tortillas. Both improved maicillos compared favorably with Sureño (used as positive control during processing). The criollos produced darker, less acceptable tortillas. Masa and tortillas from criollos darkened during lime-cooking especially during baking. All sorghums and their respective tortillas had similar chemical composition. The improved maicillos bred in Honduras have a significantly improved plant and glume color with white pericarp. The sorghum improvement was also observed in the overall tortilla quality.

Color↗

PubMed1988

[Physico-chemical evaluation of products extruded with sorghum-corn-soybean blends].

Yellow corn grits (M), brown sorghum (SM), white sorghum (SB) and full fat soy flour (S) blends were extruded in an autogenous Brady Crop Cooker extruder at 195-200 degrees C and 11% moisture content. Binary blends (70:30) made up of M:S, SM:S and SB:S; and ternary blends (30:40:30) made up of SM:M:S and SB:M:S were extruded. Under these conditions, extrudates contained about 19% protein and 6% fat, which are within the specifications given for cereal/oil seed blends. Raw and extruded samples were analyzed for ES, WQI, WSI, MD and paste viscosity. All blends underwent modifications in the starch fraction at granular and molecular level. Brown sorghum extrudates presented higher degradation than those of white sorghum and corn:soy blends, although the last ones gave similar responses to analitical techniques. Extrudates greatly increased their ES, SWI and MD values, suggesting that degradation products, like dextrins, were present. Cooked paste low viscosities (50 degrees C) and micrographs support these findings. Because of their functional characteristics, extrudates could be used in beverages.

Dextrins↗

PubMed1987

[A model for the extrusion of a corn:soybean blend (70:30)].

Most of the physicochemical and sensorial properties of the extrudates depend on the extent of the starch degradation. A cereal extrudate has physicochemical properties similar to those of a blend of raw, gelatinized and dextrinized starch. Based on this postulate, models of cereal: oilseed blends were prepared, and different analytical techniques for their characterization were applied. Results revealed that the corn:soy (70:30) extruded sample under study, was similar to moderately dextrinized corn:soy blend obtained in the laboratory. Therefore, it could be used to prepare "papillas" or precooked foods.

Food Handling↗

PubMed1987

[Nutritional and stability evaluation during storage of blends extruded with sorghum].

Binary sorghum:soy (70:30) and ternary sorghum:corn:soy (30:40:30) blends using high and low tannin content dehulled sorghum were extruded. The effectiveness of heat treatment was determined by protein dispersion index (PDI) and ureasic activity (delta PH), indicating that proteins were denatured and antinutritional factors reduced. The nutritional evaluation supported the fact that samples were adequately treated, giving ternary blends true digestibility (TD) and biological values (BV) similar to milk casein. Blend stabilities, expressed as peroxide index (PI), revealed a low lipid oxidation rate during the first seven months, and were acceptable up to a year of storage. Extrudates with incorporated sorghum cover protein and energy demands of the growing infant, and provide a high nutritional value and long-life product.

Animals↗

PubMed1986

[Dehulling of sorghum in grinding mills].

The efficiency of the dehulling process of sorghum grain was studied in a laboratory abrasive stone mill. Residual tannins as tannic acid and cathequin equivalent, as well as color measurements of the product were determined as control parameters of the procedure. Besides, fiber, ash and fat contents as well as other variables were evaluated. Assays were performed at three stone speeds and at different operation times. According to the results obtained, a stone speed of 1,700 rpm and a 12-minute period, are the best operating conditions, while measurements of color of the product constitute the best method for controlling the dehulling process.

Edible Grain↗

PubMed1986

[Peeling of sorghum by a dry method: continuous and discontinuous methods].

A study was carried out wherein two dry dehulling sorghum grain methods, the continuous and discontinuous types, were quantitatively compared in a laboratory abrasive dehulling device. Reflectance values, expressed as dehulling percentage, the percentage of kernels removed, and of kernel cracking were evaluated. Graphs of the dehulled and removed percentages as function of the contrast time for each method, revealed that the continuous process was the most efficient of both procedures. Analysis of the broken kernels indicated a similar behavior for both methods. The macrocomponent and tannin variations as dehulling advanced, as well as the reflectance values were determined with the continuous method. Findings showed that the greater proportion of tannin, fiber and ashes has been removed at the 85% extraction rate. Thus, abrasion of grains above the 65% extraction rate is not convenient, since an excessive loss of nutrients is produced without any important decrease in polyphenolic pigments and of those imparting color to the sorghum grain milling products.

Edible Grain↗

PubMed1985

[Selection of parameters for thermal treatment of soybeans by enzyme inactivation].

The effects of thermal treatment, dry heat and steam on the physiologically active substances: urease and trypsin inhibitors of soybean products, were evaluated by means of urease activity and trypsin inhibitor activity. The parameters time and temperature, moisture and particle size were considered. From these analyses it can be concluded that the best conditions to obtain optimum soybean products were 25% of initial moisture content, exposed to steam (97 degrees C) during four to eight minutes.

Food Technology↗

PubMed1985

[Development of a food of intermediate moistness from extracts of corn and soybean].

Precooked cereal:oilseed blends have potential use as intermediate moisture food supplements. On this basis, some formulations from corn:soy extrudates, and other ingredients, were prepared and evaluated. The main objective of this work was to develop a prototype intermediate moisture vegetable food, stable at room temperature, of low cost, and inexpensive packaging requirements. The technological process involves thermal and enzymatic modification of corn and soy blends. The final product can be suspended in water and consumed as a high energy-protein beverage. Its proximate composition is similar to that of sweetened condensed milk.

Food, Formulated↗

PubMed1985

[Evaluation of the starch fraction in corn products consumed regionally].

The purpose of this study was to evaluate through conventional analytical procedures, the degree of modification of the starch fraction of regional products based on corn, such as grits, flours, precooked grits, flakes, precooked flour, "frangollo" and "locrillo." Based on the interpretation of changes in the starch fraction, the following conclusions are reached. Corn grits, flours, "frangollo" and "locrillo" are raw corn products subjected to physical processes such as shelling, degermination and size reduction. They do not show changes in their physicochemical characteristics. Precooked grits present certain structural modification (among others, changes in their rheologic behavior) and partial molecular change (among others, changes in the insoluble carbohydrate fraction), indicating that they have been subjected to processes wherein factors such as temperature, moisture and/or pressure intervene. Corn flakes and precooked flours show a high enzyme digestibility and a high degree of change in their functional properties (mainly, in regard to solubility, absorption and viscosity). These changes indicate modification at granular and molecular level.

Argentina↗