当社グループは 3,000 以上の世界的なカンファレンスシリーズ 米国、ヨーロッパ、世界中で毎年イベントが開催されます。 1,000 のより科学的な学会からの支援を受けたアジア および 700 以上の オープン アクセスを発行ジャーナルには 50,000 人以上の著名人が掲載されており、科学者が編集委員として名高い
。オープンアクセスジャーナルはより多くの読者と引用を獲得
700 ジャーナル と 15,000,000 人の読者 各ジャーナルは 25,000 人以上の読者を獲得
Ximena Pinzón-Zarate and Mario Arias-Zabala
The rice husk, agro industrial waste from rice processing, is a highly available, renewable and economical lignocellulosic raw material, which
due to its low density accumulates occupying large volumes, generates environmental problems promoting the infestation of pests and rodents and for its characteristics physicochemical, it turns out to be of slow decomposition, becoming a highly polluting waste. Its weight and volume generate high storage and transportation costs for the rice industry; In addition, due to its low protein value and low digestibility, it has limited use for animal feed. This residue by hydrolysis processes can release fermentable sugars such as xylose, the substrate for the production of xylitol, a polyol with a high sweetening power and 40% less calories than sucrose. It has functional and beneficial properties for health, and has been used as a sugar substitute by the food and pharmaceutical industry. Xylitol can be obtained biotechnologically by yeast fermentation of the genus Candida. The influence of oxygen limitation on the fermentation of xylose to xylitol by Candida tropicalis ATCC 96745 was investigated in shake flasks by varying the ratio of the volume of the medium and the volume of the flask between (0.2 and 0.6). This parameter substantially influenced the production of xylitol obtaining the highest production of the metabolite using the ratio 0.2. Under semiaerobic conditions, the maximum concentration was reduced by a third, compared to aerobic conditions. With these results, different rates of oxygen mass transfer coefficient (kLa) are evaluated in a stirred tank bioreactor.