Fernando Nuño García

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—The use of the average-current-mode control in the recently introduced two-input buck postregulator is studied in this paper. Using this type of control, the attenuation of the input voltage ripple (100–120 Hz) increases in relation to the one obtained when a conventional voltage-mode control (with or without feedforward) is used and, therefore, lower bulk(More)
Crustacean lipids are transported in the hemolymph by an HDL. The hepatopancreas is the most important and active organ regarding lipid metabolism, so we studied the interchange of FA and acylglycerols between both components of the hepatopancreas-hemolymph system in the decapod crustacean Macrobrachium borellii. The hepatopancreas and a sole plasma(More)
The prawn Macrobrachium borellii has lecithotrophic eggs with highly-abbreviated development. The major yolk component is lipovitellin (LV), a lipoprotein with 30% lipids (by weight). LV consumption during embryogenesis was followed by ELISA and Western blot analysis using an anti-LV polyclonal antibody. No cross-reacting proteins were observed and LV-like(More)
Findings on hemolymph lipoproteins in the class Arachnida are reviewed in relation to their lipid and protein compositions, hydrated densities, the capacity of apoproteins to bind lipids, and the influence of xenobiotics on their structures and functionality. The occurrence of hemolymphatic lipoproteins in arachnids has been reported in species belonging to(More)
Despite vitellins being essential yolk proteins, their presence in spiders remains almost unknown. Two vitellins from the spider Polybetes pythagoricus, named LV1 and LV2, were isolated and their size, shape, lipids, fatty acids, proteins and carbohydrates moieties were determined. LV1 has a density similar to that of HDL with 49.3% lipids, and LV2 has a(More)
It has been already reported that most hemolymphatic lipids in the spider Polybetes pythagoricus are transported by HDL1 and VHDL lipoproteins. We studied in vitro the lipid transfer among midgut-diverticula (M-diverticula), and either hemolymph or purified lipoproteins as well as between hemolymphatic lipoproteins. M-diverticula and hemolymph were labeled(More)
The importance of midgut diverticula (M-diverticula) and hemolymph lipoproteins in the lipid homeostasis of Polybetes phythagoricus was studied. Radioactivity distribution in tissues and hemolymph was analyzed either after feeding or injecting [1-(14)C]-palmitate. In both experiments, radioactivity was mostly taken up by M-diverticula that synthesized(More)