Este manual está diseñado para proporcionar un resumen exacto, actual y autorizado, de las principales leyes Federales y de Florida que están directa o indirectamente relacionadas con la agricultura. This revised document is part of a series of 37 brief fact sheets, the Spanish-language version of the Handbook of Florida Water Regulation. Published by the UF Department of Food and Resource Economics, May 2012. FE072/FE072: Manual de los Reglamentos del Agua en Florida: Ley de Protección de la Calidad de los Alimentos (ufl.edu)

Este manual está diseñado para proporcionar un resumen exacto, actual y autorizado, de las principales leyes Federales y de Florida que están directa o indirectamente relacionadas con la agricultura. This revised document is part of a series of 37 brief fact sheets, the Spanish-language version of the Handbook of Florida Water Regulation. Published by the UF Department of Food and Resource Economics, May 2012. FE072/FE072: Manual de los Reglamentos del Agua en Florida: Ley de Protección de la Calidad de los Alimentos (ufl.edu)

Mestrado em Agronomia Tropical e Desenvolvimento Sustentável - Instituto Superior de Agronomia

Este manual está diseñado para proporcionar un resumen exacto, actual y autorizado, de las principales leyes Federales y de Florida que están directa o indirectamente relacionadas con la agricultura. This revised document is part of a series of 37 brief fact sheets, the Spanish-language version of the Handbook of Florida Water Regulation. Published by the UF Department of Food and Resource Economics, May 2012. FE072/FE072: Manual de los Reglamentos del Agua en Florida: Ley de Protección de la Calidad de los Alimentos (ufl.edu)

This article assesses the emergency stockpiling of food and drinking water at the household level and identifies the socioeconomic factors affecting households' decision making in this regard. The results show that only 30% of the respondents stock both food and drinking water as recommended. Further, around 65% of the respondents are projected to be food insecure when essential utilities become unavailable. Our probit regression results reject the moral hazard hypothesis in disaster preparedness and show that emergency food stockpiles are treated as luxury goods despite their importance. The policy implications of our results are discussed with the view of strengthening community-based disaster management.

A. Castro et al., 'Quesungual Slash & Mulch Agroforestry System (QSMAS): Improving crop water productivity food security and resource quality in the sub-humid tropics', 2012

Durante 40 días se cultivaron juveniles de camarón blanco Litopenaeus vannamei con un peso individual de 3,5 ± 0,3 g y biomasas iniciales de 25, 50, 75 y 100 g m-3 (equivalente a 8-32 ind m-2), sin cambios de agua y adición de alimento, para determinar la tasa de crecimiento usando como única fuente de alimentación el perifiton desarrollado en sustratos artificiales. Se utilizaron estanques cilíndricos de polietileno de 1 m³ con tres réplicas por tratamiento, con una superficie de 4,8 m² (paredes y fondo) y 7,1 m² de sustrato artificial (Aquamats™). No se encontraron diferencias significativas entre las concentraciones de amonio (0,17-0,19 mg L-1) y nitrito (0,10-0,11 mg L-1) determinadas en los cuatro tratamientos. La supervivencia fue similar, variando entre 91 y 97%. La ganancia en peso individual fue significativamente mayor en los tratamientos con menor biomasa inicial (25 y 50 g m-3), aunque por la mayor densidad inicial, el mejor rendimiento en biomasa se observó en los cultivos sembrados con 100 g m-3. Los contenidos de nitrógeno determinados al final del experimento, en el agua y sedimento, fueron inferiores a los valores iniciales, y entre el 36 y 60% de sus diferencias se recuperaron en biomasa de camarón. | Juveniles (3.5 ± 0.3 g) of the white shrimp Litopenaeus vannamei were grown during 40 days with no water exchanges, no food addition and four initial densities (25, 50, 75 and 100 g m-3, corresponding to between 8 and 32 shrimp m-2), to determine growth rates, which could be achieved using the periphyton growing on artificial substrates as the only food source. The experimental culture units were 12 polyethylene 1 m³ cylindrical tanks with 4.8 m² of total submerged surface (bottom and walls), provided with 7.2 m² of artificial substrate (Aquamats™). There were no significant differences in the ammonia and nitrite concentrations determined in the four treatments (0.17-0.19 and 0.10-0.11 mg L-1, respectively), which remained below the respective levels of concern for shrimp cultures. Mean survival was similar, and ranged from close to 91 to 97%, whereas there were significant differences in mean individual weight, which ranged from 11.9-10.6 g shrimp-1 for the two low initial densities (25 y 50 g m-3), to 8.3-7.7 g shrimp-1 for the other treatments. However, because of the high survival and of the higher initial density, the best biomass yield was with 100 g m-3. The final nitrogen contents of sediment and water were lower than the initial values, and between 36 and 60% of the difference was converted into shrimp biomass.

A simple and highly selective and sensitive catalytic adsorptive stripping voltammetric procedure for determination of ultra trace levels of chromium(VI) on hanging mercury drop electrode is reported. The method is based on the adsorptive preconcentration of the Cr(III)–dithiooxamide (rubeanic acid) complex and the utilization of the catalytic reaction in the presence of nitrate. At optimized conditions the calibration graph is linear from 0.01 to 6ng/ml and detection limit is 0.002ng/ml for accumulation time of 50s. The interference of some common ions was studied and this method has been applied to the determination of chromium in food and waste water samples with satisfactory results.