Tianjin University

China National Offshore Oil Corporation

Beijing Hongming Xinda Technology Co., Ltd

Offshore Oil Engineering Co., Ltd.

Tianjin Lvxin Cryogenic Science and Technology Co., Ltd.

Institute of Environmental and Operational Medicine, Academy of Military Medical Science, Academy of Military Science

Tasly Pharmaceutical Group Co., Ltd.

Yu Wang

Xihong Li

Yi He

Shuiping Zhou

Qing Zhang

Shuang Li

Yanfang Pan

Zhijuan Huang

Yuanpeng Jin

Liang Huang

Xiaoyu Jia

Jing Lu

Xiaoxiao Lin

Jialei Bai

Jin Wu

Tie Han

Shuyue Ren

Kang Qin

Yuan Peng

Dianpeng Han

Huanying Zhou

Zhixian Gao

Zhaohui Song

Weiqiao Yang

Yao Tang

Hongpeng Yang

Ning Sun

Yuzheng Zhang

Litong Ban

Gang Zhu

Xianpu Tang

Wenduo He

Fudan Zhou

Yu Sun

Jian Su

Juan Su

Xiqiang Zhang

Zhongzhi Ye

Jinghua Kang

Yuanxue Liu

The present application relates to the technical field of wastewater treatment and rapid pollutant detection, in particular to a chitosan-polyacrylamide composite porous hydrogel, preparation and use thereof, and a metal ion-adsorbing and detecting reagent and method. The chitosan-polyacrylamide composite porous hydrogel of the present application is prepared by in situ polymerization of a chitosan sol, an acrylamide, a crosslinking agent and a surfactant into a mixed solution comprising liquid droplets, followed by steps of curing, washing, and freeze-drying. The present application further provides a metal ion-detecting reagent, which is obtained by adsorbing a color developing agent into the chitosan-polyacrylamide composite porous hydrogel as described above, wherein the color developing agent is a dye that changes color when encountering metal ions. The chitosan-polyacrylamide composite porous hydrogel of the present application has balanced mechanical properties and porosity.

Chitosan-polyacrylamide composite porous hydrogel, preparation and use thereof, and metal ion-detecting reagent and method

A device for fruit and vegetable phase-temperature precooling compatible multi-coupling anti-aging treatment comprises a refrigeration house with a plurality of differential pressure precooling devices placed therein. The differential pressure precooling device comprises a hermetic seal tunnel precooling box, a separator plate is fixedly mounted at an upper part inside the tunnel precooling box and in parallel to a top wall of the tunnel precooling box with a space formed therebetween; the separator plate extends to the bottom of the tunnel precooling box; a venting plate is fixedly mounted to one side of the separator plate and in parallel to a side wall of the tunnel precooling box with a space formed therebetween; a section of wind shield is vertically and downwardly mounted to an end of the other side of the separator plate; an axial flow fan is mounted at a corner of the tunnel precooling box between the separator plate and the venting plate.

Technology and device for fruit and vegetable phase-temperature precooling compatible multi-coupling anti-aging treatment

Method of constructing a vault of a large storage tank for liquefied natural gas by first modeling the vault with a 3-D modeling software application, then partially building the vault with a framework and a first set of covering panels fixed on the framework where the panels do not touch each other, but leave a number of gaps between them, measuring the dimensions of the actual gaps between the panels using a 3-D scanner, producing a second set of panels according to the scanned dimensional data, and finally filled the gaps between the first set of panels with the second set of panels, which are much smaller than the first set of panels, making the building process earlier and more accurate, which are difficult issues in building large tanks for liquefied natural gas.

Three-dimensional layoutlayout method for splicing vault plates of large LNG storage tank

The present application relates to the field of enzyme engineering, especially relates to a pullulanase as well as preparation and use thereof. The pullulanase and coding gene thereof were obtained by random mutation by using the Error-prone PCR technique on the gene of wild-type pullulanase to obtain a mutant PLUM. The enzyme activity of the mutant PLUM was improved by 57.03% compared with the wild-type pullulanase PLUM.

Pullulanase and use thereof

Growing community of inventors

Tianjin, China

Yu Wang