Different effects of selenium speciation on selenium absorption, selenium transformation and cadmium antagonism in garlic.

Currently, planting selenium-rich crops using inorganic selenium such as selenate and selenite is used to address human selenium deficiency problems. In this paper, besides the above two traditional inorganic selenium speciation, we chose a new organic selenium speciation of potassium selenocyanoacetate to investigate the different effects of selenium speciation on selenium absorption, selenium transformation and cadmium antagonism via foliar application. Plantingexperiments showed that the selenium content of garlic bulbs treated with organic selenium was 1.8-3.9 times higher than that of inorganic selenium. Additionally, the absorption and transformation efficiency of organic selenium in garlic was also the highest, reaching over 95 %. Importantly, it was noteworthy that the cadmium content in bulbs treated with organic selenium was significantly lower than the Chinese food safety standard (0.2 mg/kg). Hence, this study provides an efficient organic selenium speciation which is beneficial to meet human selenium requirements and ensure safe utilization of cadmium-contaminated soils.

Synthesis and characterization of amoxicillin nanostructures.

Simple chemical deposition was used to prepare three types of amoxicillin nanostructures. Their morphology and size were characterized by scanning electron microscopy, and their chemical bonds were examined by Fourier transform infrared spectrum. Our results show that amoxicillin nanobelts, nanofibers, nanoparticles, and microparticles can be obtained by changing the pH in solutions of amoxicillin sodium. To some degree the controllable growth of amoxicillin can be realized.