Hangzhou Singclean Medical Products Co., Ltd

Zhejiang University

Alipay (hangzhou) Information Technology Co., Ltd.

Wei Huang

Zhiguo Zhang

Yange Suo

Weiqing Sun

Jue Wang

Zhong Wang

Jin Zeng

Yang Fu

Lingling Lyu

Yurong Cai

Kaihua Lu

A cyclical and continuous device and method for wet sieving of polysaccharide granules are provided. The device includes a first dosing tank, a second dosing tank connected to the first dosing tank by a first circulation pump, a first suction filtration tank connected to the second dosing tank by a second circulation pump, and a second suction filtration tank connected to the first dosing tank by a third circulation pump. An overflow port provided on a side wall of the second dosing tank is higher than a feed port of the first dosing tank. A sieve of a mesh filter for coarse powder is disposed in the first dosing tank. A sieve of a mesh filter for fine powder is disposed in the second dosing tank. A stirring device is disposed in both the first dosing tank and the second dosing tank.

Cyclical and continuous device and method for wet sieving of polysaccharide granules

The present specification discloses a method and system for implementing interworking of different payment operations. On a basis of determining a payment link by an entry passing operation, related data generated by a first exit payment operation belonging to a different type from the entry passing operation is superimposed on the payment link, fee deduction information is further determined, and the fee deduction information corresponding to the first exit payment operation is transmitted, by using the payment link, to a third-party payment system for exit fee deduction.

Method and system for implementing interworking of different payment operations

The application relates to a sericin protein particle with an oxidative stress property, a method for preparing the same and use thereof. The particle is formed by sericin protein and a tellurium compound. In the method for preparing the sericin protein particle, bis(1-hydroxydodecyl) telluride is first prepared and then mixed with a solution of sericin protein, and a resulting solution is agitated continuously for some time to obtain telluride-modified sericin protein. Then, the solution of the sericin protein is added dropwise into absolute ethanol to obtain a precipitated product. An aqueous solution of the precipitated product and a solution of magnesium ions are mixed and agitated for a certain time to obtain the sericin protein particle with an oxidative stress property. The sericin protein particle disclosed is a hollow particle having a diameter in a range of 600-1250 nm, and is capable of loading biomacromolecule drugs or other components.

Sericin protein particle with oxidative stress property, method for preparing the same and use thereof

A preparation method of a cross-linked sodium hyaluronate gel is disclosed, which including: preparing an alkaline aqueous solution of hyaluronic acid: formulating a sodium hyaluronate alkali liquor with the concentration of 10-30% g/ml; and carrying out a cross-linking reaction: the cross-linking agent used in the cross-linking reaction being divinyl sulfone or 1,4-butanediol diglycidyl ether, the cross-linking reaction being carried out in an alkaline aqueous solution of hyaluronic acid, the reaction temperature of the cross-linking reaction being 20-40&#xb0; C., the time of the cross-linking reaction being 4-8 h, and the like. The method of this invention has many advantages, such as easily available raw materials, mild reaction conditions, high cross-linking efficiency, simple process and post-treatment, and easy operation. The obtained cross-linked sodium hyaluronate has a three-dimensional network structure by the crosslinking reaction with good mechanical properties, and can be used as a good drug carrier and a tissue engineering scaffold material.

Preparation method of cross-linked sodium hyaluronate gel

A method of preparing an oxidized starch haemostatic material, including adding a starch raw material to an external circulation pulsatile reactor; switching on a pump to allow inflow of dry air for drying the raw material; switching on a heat exchanger; vacuumizing the reactor; opening a nitrogen dioxide pipeline and a dry air pipeline; pumping in a mixed gas; controlling temperature at 0-120&#xb0; C. by the heat exchanger; wherein nitrogen dioxide is contacted with the raw material to trigger a selective oxidation reaction and is continuously recycled; an airflow circulation switch is switched on and off at a pulsating ratio of 1:1-10 to carry out airflow pulsation; stopping inflow of nitrogen dioxide and continuing airflow circulation for 5-30 minutes; after completion of the reaction, adjusting to room temperature; vacuumizing the reactor and treating exhaust gas; allowing nitrogen gas to flow in for rinsing the replaced reactor until completion.

Method of preparing oxidized starch haemostatic material

Disclosed is a method for preparing an oxidized cellulose hemostatic product, including using a sodium hydroxide solution with the concentration of 1 to 5% to pre-process a cellulose product; after removing lignins or impurities on the fiber surface, using an alkaline solution to activate the fiber surface further; after the activating treatment, using demin-water for washing until it is neutral and drying the obtained cellulose product in air to obtain a raw material; using a sodium hydroxide solution with the concentration of 5 to 20% as a solvent; adding the cellulose product, carbamide and ZnO that are 3 to 10%, 2% and 2% of the sodium hydroxide solution respectively.

Growing community of inventors

Zhejiang, China

Wei Huang