Production of Gibberellic Acid by Solid-State Fermentation Using Wastes from Rice Processing and Brewing Industry.

Gibberellic acid (GA) is a natural hormone present in some plants used in agricultural formulations as a growth regulator. Currently, its production on an industrial scale is performed by submerged fermentation using the fungus Gibberella fujikuroi, which is associated with low yields, leaving the purification stages with high costs. An alternative is solid-state fermentation (SSF), which makes it possible to obtain higher concentrations of product using low-cost substrates, such as agroindustrial by-products.

The impact of a diphenyl diselenide-supplemented diet and aerobic exercise on memory of middle-aged rats.

Selenium is an essential trace element for human health and has received attention for its role as a nutrient. The combination of exercise and nutrients has been proposed to promote health. The aim of this study was to determine the effects of a diet supplemented with diphenyl diselenide (PhSe)2 and swimming exercise on memory of middle-aged rats.

Regioselective formation of tetrahydroselenophenes via 5-exo-dig-cyclization of 1-butylseleno-4-alkynes.

Results on the synthesis of tetrahydroselenophene derivatives from 1-butylseleno-4-alkynes by electrophilic cyclization using iodine as the electrophilic source are presented. This methodology was carried out via a simple process under mild reaction conditions providing the cyclized products in high yields. Electrophilic sources, such as PhSeBr, CuCl(2), and CuBr(2), were also used in this study.