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Biomedical subjects

A Infante

Publications and source records attributed to A Infante.

7 recordsLinked to original sources

[Development of an energy food for athletes].

The energetic requirements of sportsmen fluctuates between 3500 and 8000 Kcal/day. In order to fill these needs it is necessary to have new alternative products which provide the extra required energy. For this purpose a confectionary was designed and elaborated consisting of five different bars, made of natural raw materials (dehydrated fruits, milk, eggs, nuts, fat), which supply an important quantity of fats and carbohtdrates, minerals, and vitamins. The confectioned bars were: papaya, hazelnut, almond, apple and orange. These bars are supposed to be eaten between meals as a complement of the nutrients of the usual diet. The production process is an adaptation of the traditional confectionary techniques and was improved for the 5 bars. The production process of the coating sheet (oblate) was also studied. The controls showed that all the bars had a good microbiological quality and an excellent sensory quality. The humidity fluctuated between 6.85 and 13.66%., with an aw of 0.795. The caloric distribution per cent was 8:40:52. The energetic supply was 520 Kcal/100g; so, the ingest of two displays covers between 25-30% of recommended intake for the most frequently practiced sports. The shelf life studies of the product stored in ambiental conditions (20-25 degrees C and 55-60% RH) showed that the product without additives maintained its good quality up to 60 days. The product plus preservative as well as plus antioxidant stays without quality modifications up to at least 120 days, neither rancid odor no rancid flavor was detected. So, we conclude that it is nor necessary to add any antioxidant. The double sheet polypropilene package film showed very good characteristics in protecting the quality of the product.

Antioxidants

[Functional evaluation of a nutritional energy supplement in athletes].

A nutritional caloric supplement as bar in 5 different flavours was evaluated in 9 sportsmen that ate daily 1040 Kcal/100 g extra during 8 weeks. Anthropometric measurements were used for weight, body fat, lean body mass and functional test for VO2 max, anaerobic threshold (AnT) and anaerobic power (AnP). Both tolerance and acceptability were evaluated too. Other similar sportsmen group was employed as control. Positives answers were registered in VO2 max (8.74%) and AnP (p < or = .04), meanwhile the rest of parameters remained without alterations, the same of control group. Test TAT evidence a high preference and a tolerance without deleterious effect. In conclusion, the product evaluated is an excellent ergogenic aid in effort with elevated energetic demand.

Adult

Arsenic in the drinking water of the city of Antofagasta: epidemiological and clinical study before and after the installation of a treatment plant.

This is a second report of epidemiological and clinical investigation, related to the arsenic health problem, unique in the world, occurring in the city of Antofagasta, Chile. The arsenic problem originates in the chronic contamination of water supply in the city during 12 years. This phenomena, investigated clinically and epidemiologically and first reported in 1971, prompted the installation of a water treatment plant. This report aims to evaluate the working efficiency of the plant. The study was carried out through the examination of arsenic content in hair and nail clipping samples of the inhabitants of Antofagasta and the determination of this element in cultivated vegetables and carbonated beverages. Also a clinical study in school children, looking for cutaneous lesions attributed to arsenicism, was made. Results are encouraging. They reveal that contamination persists but in significantly lower levels.

Adolescent

Complete covalent structure of a human IgA1 immunoglobulin.

The complete covalent structure has been determined for a human myeloma IgA1 immunoglobulin. This protein has unique features in the amino acid sequence and disulfide bridge structure of the variable (V) and constant (C) regions of both the alpha heavy and the lambda light chains, and in the number and loci of oligosaccharides. Whereas C region domains of heavy chains have evolved independently over eons, recent isotypic variations have occured in lambda light chains and possibly in alpha heavy chains.

Amino Acid Sequence