Effect of processing on the drying kinetics and functional value of dried apricot

Apricots can be considered as a good source of phenolic compounds, which are beneficial for human health. Microwaves may be an alternative to the conventional sun or hot air drying techniques used to obtain dried apricot. Nevertheless, their impact on the functional compounds must be taken into account if they are to be recommended as an attractive drying option. This work compares the drying kinetics and the change in the organic acids, phenolic compounds and antioxidant activity of dried apricot when using hot air drying and microwave energy. Empirical (linear and Page) equations can be used to model the drying kinetics in air, combined air-microwave and microwave processes. From the obtained results, it can be concluded that the industrial processing of dried apricots may be improved by using microwave energy, as the drying time is considerably reduced, and the obtained fruit had a higher phenolic content, particularly of chlorogenic acid, catequin and epicatequin. Nevertheless, as the contribution of these phenols to antioxidant capacity was not significant, microwave dried samples maintained the same antioxidant capacity as the air-dried ones. When sulphite is added previous to the drying processes, care should be taken with the total phenols and the antioxidant capacity quantified as it may interfere with the results depending on the methodology used. © 2011 Elsevier Ltd.Igual Ramo, M.; García Martínez, EM.; Martín-Esparza, M.; Martínez Navarrete, N. (2012). Effect of processing on the drying kinetics and functional value of dried apricot. Food Research International. 47(2):284-290. doi:10.1016/j.foodres.2011.07.019S28429047

Causes and Consequences of Increasing Herbicide Use in Mali

This paper examines the origins and impact of rapid recent growth of herbicide use in Mali. Primary data come from interviews with herbicide importers and distributors in major markets across Mali and from a 2014/15 survey of 700 farm households in Mali’s Sudanian Savanna zone. Results suggest that a series of major supply-side innovations are driving growth in Mali’s herbicide markets, most conspicuously a proliferation in the number of herbicide brands marketed, a shift to low-cost suppliers in China and India, and consequently falling herbicide prices. At the farm level, herbicides cost on average 50% less than hiring weeding labor. Despite low econometric estimates of damage abatement, herbicide adoption rates reach 25% in remote rural zones and 75% in more accessible rural areas. Key factors affecting adoption include spatial variation in herbicide prices and rural wage rates. At current rates, herbicide usage reduces peak season rural labor demand by 20%