Blood is irradiated degree (Croton lechleri​​) powder to different doses of gamma (5, 8, 15, 25 and 40kGy) radiation. The antioxidant properties of the samples decreases with increasing irradiation dose. However, no noticeable changes were observed in their UV-visible and infrared spectra, which suggests to us that there were no major changes in the constitution of latex powder after irradiation. Also, the antimicrobial properties of aqueous-alcoholic solutions of these irradiated samples, embedded in chitosan-PVA films, against bacterial strains Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were not changed compared with blood samples unirradiated grade. These films have only Irente activity to S. aureus.

Blood is irradiated degree (Croton lechleri​​) powder to different doses of gamma (5, 8, 15, 25 and 40kGy) radiation. The antioxidant properties of the samples decreases with increasing irradiation dose. However, no noticeable changes were observed in their UV-visible and infrared spectra, which suggests to us that there were no major changes in the constitution of latex powder after irradiation. Also, the antimicrobial properties of aqueous-alcoholic solutions of these irradiated samples, embedded in chitosan-PVA films, against bacterial strains Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were not changed compared with blood samples unirradiated grade. These films have only Irente activity to S. aureus.

Various doses (0-20 kGy) of gamma radiation have been applied to samples of maca (Lepidium meyenii walp) flour, yellow, white and purple ecotypes, to decontaminate them. The gamma radiation dose required to eliminate the aerobic mesophiles was 12-15 kGy while it was necessary to applied 1-8 kGy to kill fungi, depending on the ecotype of Maca. We have determined the antioxidant activity of the irradiated samples by the method of neutralization of DPPH radical. IC50 values of the studied samples indicate that gamma radiation does not substantially alter the antioxidant activity of aqueous extracts of maca yellow, white and purple. In contrast, the antioxidant activity of hydroalcoholic extracts of irradiated maca yellow decrease sharply, but not the other ecotypes.

Various doses (0-20 kGy) of gamma radiation have been applied to samples of maca (Lepidium meyenii walp) flour, yellow, white and purple ecotypes, to decontaminate them. The gamma radiation dose required to eliminate the aerobic mesophiles was 12-15 kGy while it was necessary to applied 1-8 kGy to kill fungi, depending on the ecotype of Maca. We have determined the antioxidant activity of the irradiated samples by the method of neutralization of DPPH radical. IC50 values of the studied samples indicate that gamma radiation does not substantially alter the antioxidant activity of aqueous extracts of maca yellow, white and purple. In contrast, the antioxidant activity of hydroalcoholic extracts of irradiated maca yellow decrease sharply, but not the other ecotypes.

Nanoparticles of zinc peroxide were synthesized by sol-gel technique using as precursors aqueous solutions of zinc acetate di-hydrate (Zn(CH3COO)2.2H2O) and hydrogen peroxide (H2O2) at 30%. During the synthesis the sol was exposed to an specific radiation (gamma or ultraviolet). The structure of the ZnO2 nanoparticles was characterized by X-ray diffraction. The sol absorbance vs. the time of irradiation was studied for UV irradiated sols. Thin films of ZnO2-ZnO were made using spray pyrolysis of the irradiated sols. The morphology of these films was studied by atomic force microscopy.

Nanopartículas de peróxido de zinc (ZnO2) fueron sintetizadas mediante la técnica de sol-gel, empleando acetato de zinc di-hidratado (Zn(CH3COO)2.2H2O) y peróxido de hidrógeno (H2O2) al 30% en un medio acuoso. Durante la síntesis, el sol fue expuesto a una determinada radiación (gamma o ultravioleta). Las nanopartículas de ZnO2 obtenidas fueron caracterizadas estructuralmente mediante la técnica de difracción de rayos-X. Se estudió la dependencia de la absorbancia del sol con relación al tiempo de irradiación ultravioleta. Empleando la técnica de rociado pirolítico se depositaron películas delgadas de ZnO2-ZnO utilizando el sol irradiado. La morfología de las películas fue estudiada mediante microscopía de fuerza atómica.

This study investigates the applicability of Satellite Precipitation Products (SPPs) in near real-time for the simulation of sub-daily runoff in the Vilcanota River basin, located in the south-eastern Andes of Peru. The data from rain gauge stations are used to evaluate the quality of Integrated Multi-satellite Retrievals for GPM–Early (IMERG-E), Global Satellite Mapping of Precipita-tion–Near Real-Time (GSMaP-NRT), Climate Prediction Center Morphing Method (CMORPH), and HydroEstimator (HE) at the pixel-station level; and these SPPs are used as meteorological inputs for the hourly hydrological modeling. The GR4H model is calibrated with the hydrometric station of the longest record, and model simulations are also verified at one station upstream and two stations downstream of the calibration point. Comparing the sub-daily precipitation data observed, the results show that the IMERG-E...