This work was partially financed by DGI-PUCP (Grant No. 2015-224). J.C. received financial support from CONCYTEC/FONDECYT (Peru).

Aflatoxins, a group of highly toxic substances produced by certain species of Aspergillus, especially A. flavus, have been found to occur in agricultural products such as corn, peanuts, cotton seed, animal feed, and many varieties of nuts. Experimental studies show that aflatoxins are carcinogenic. This paper proposes a plan of actions to prevent, control and desinfecting products contaminated with aflatoxins. Post harvest treatment of the product involves drying and storage temperature of 5 °C and relative humidity below 80%. The technique of ozone gas to disinfect contaminated products represents the best alternative because does not generate waste, the product is not damaged and the ozone gas is safe.

Aflatoxins, a group of highly toxic substances produced by certain species of Aspergillus, especially A. flavus, have been found to occur in agricultural products such as corn, peanuts, cotton seed, animal feed, and many varieties of nuts. Experimental studies show that aflatoxins are carcinogenic. This paper proposes a plan of actions to prevent, control and desinfecting products contaminated with aflatoxins. Post harvest treatment of the product involves drying and storage temperature of 5 °C and relative humidity below 80%. The technique of ozone gas to disinfect contaminated products represents the best alternative because does not generate waste, the product is not damaged and the ozone gas is safe.

The purpose of this work is to verify the presence of iron sulfides in gray laminar castings manufactured in a cubicle furnace using high sulfur anthracite as fuel, and to evaluate their impact on mechanical properties.In this work, 04 samples of foundries, 03 of high sulphur -above the standard for these materials- and one of low sulphur have been evaluated. The microstructural examination and analysis by scanning electron microscopy and EDAX microprobe, indicated abundant presence of inclusions of manganese sulphides, associated with these, iron sulphides and mixed of iron and manganese, especially in high sulphur samples. The evaluation of the manganese content in the samples explains the presence of iron sulfides, since according to the calculations made, it is present in the alloy even in that sample whose in a lower percentage than that required to neutralize all the S content is w...

La diabetes mellitus tipo 2 (DM2) se define genéticamente como una enfermedad compleja originada por la interacción del medio ambiente y los genes, que se encuentran ubicados en diferentes regiones del genoma humano. El gen calpaína 10 (CAPN10), localizado en 2q37.3, constituye un gen de susceptibilidad para esta enfermedad. La asociación alélica y haplotípica observada de los polimorfismos de nucleótido simple (SNP) 19, 43 y 63 en poblaciones amerindias y algunas europeas confirmaría estos resultados. En esta investigación se postuló que los SNP 19, 43 y 63 del gen CAPN10 estaban asociados a DM2 en la población peruana. Se analizaron 45 pacientes diabéticos y 58 familiares no diabéticos. Además de los factores de riesgo como la obesidad, el índice de masa corporal (IMC), la hipertrigliceridemia (HTG), la hipertensión arterial (HTA) y la hipercolesterolemia (HC), se ident...

Abstract Type 2 diabetes mellitus (T2DM) is genetically defined as a complex disease caused by the interaction of environment and genes, which are located in different regions from the human genome. Calpain 10 (CAPN10) is a susceptibility gene for the disease, located in 2q37.3. The allelic and haplotypic association observed of SNP's 19, 43 and 63 in Amerindian and some European populations would confirm these results. In this research, it has been postulated that SNP's 19, 43 and 63 of CAPN10 gene were associated with T2DM in Peruvian population. It has been analyzed 45 diabetic patients and 58 non-diabetic relatives. Among other risk factor for obesity, such body mass index (BMI), hypertriglyceridemia (HTG), arterial hypertension (HTA), and hypercholesterolemia (HC), it has been identified by polymerase chain reaction (PCR) SNP's 19, 43 and 63 of CAPN10. The Hardy-Weinberg test and co...

This work was supported in part by CONCYTEC grant 198-2005. Yanacocha and SPCC mining for providing the samples. M.A. was the recipient CONCYTEC Master in Molecular Biology scholarship

Abstract: Ten native potato varieties grown in Cusco (at 3,672 m above sea level) were used for starches extraction (at a pilot scale), and their physicochemical, functional, morphological, and structural characteristics were assessed. The content of protein, apparent amylose and phosphorus ranged from 0.1% to 0.44%, 23.42% to 35.5%, and 0.07 to 0.10%, respectively. Starch granules revealed smooth surface, with ellipsoidal and spherical shapes, particle size analysis exhibited bimodal or multimodal distribution, while the averaged crystallinity was 27.7% assessed by XRD. Gelatinization temperatures of the starches ranged from 57.4 to 60.1 °C, 60.8 to 64.3 °C, and 68.4 to 71.1°C for To, Tp, and Tc, respectively; and the gelatinization enthalpies ranged from 15.4 to 17.1 J/g. Respect to pasting properties, the peak viscosity and setback viscosity ranged from 12,970 to 16,970 mPa?s and f...