China University of Mining and Technology (CUMT)

Nanjing University

Yuxuan Wang

Qi Zhang

Feng Yan

Haowen Ma

Zhangnan Li

Di Zhu

Donghai Shi

Xuan Chen

Hongbing Pan

Sheng Lou

Zihao Wang

Tao Yue

Chenxi Wang

Yuanyong Luo

Hetang Wang

A method for purifying biological dust suppressant by two-stage ultrafiltration is provided, which utilizes the differences of physical characteristics such as solubility and molecular morphology of each substance in fermentation broth to separate and purify the target product by two-stage ultrafiltration. Firstly, the fermentation broth is centrifugally pretreated to separate insoluble substances such as microbial cells; after centrifugation, the supernatant passes through a primary ultrafiltration membrane, and the polysaccharide, lactic acid and aggregated biological dust suppressant molecules with molecular weights more than 20 kilodaltons are cut off; organic solvents such as methanol and ethyl acetate are added to the retentate for dilution, further filtering is carried out with ultrafiltration membrane with a cutoff molecular weight more than 10 kilodaltons to obtain liquid product, and finally preparing solid purified product is conducted through rotary evaporation and constant temperature drying.

Method for purifying biological dust suppressant by two-stage ultrafiltration

A photoelectric computing unit, a photoelectric computing array and a photoelectric computing method. The photoelectric computing unit includes a semiconductor multifunctional region structure, which includes at least one carrier control region, at least one coupling region, and at least one photon-generated carrier collection region and readout region.

Photoelectric computing unit, photoelectric computing array, and photoelectric computing method

Growing community of inventors

Jiangsu, China

Yuxuan Wang