Patents by Inventor Zhongying ZHAI

Zhongying ZHAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Exopolysaccharide from and method for preparing and use thereof
    Patent number: 11473115
    Abstract: The invention discloses an exopolysaccharide from Rhodopseudomonas palustris and a method for preparing and use thereof, and the method for preparing comprises the steps of: 1) keeping a seed solution from Rhodopseudomonas palustris GJ-22 in a fermentation medium for fermentation culture to obtain a fermentation broth; 2) centrifuging the fermentation broth to take the supernatant, which is treated by alcohol precipitation after filtration, and then collecting the pellet from alcohol precipitation by centrifugation to obtain crude polysaccharide; 3) removing proteins from the rude polysaccharide using protease enzymolysis method and Sevag method, followed by dialysis treatment with distilled water to remove small molecules and organic solvent to obtain a polysaccharide sample; 4) purifying the polysaccharide sample through an anion exchange column and a molecular exclusion chromatography column obtain the exopolysaccharide from Rhodopseudomonas palustris.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: October 18, 2022
    Assignees: Hunan Plant Protection Institute, Changsha Agreen Bio-Tech Ltd., Co., Suzhou Ace Chemical Technology Co., Ltd.
    Inventors: Yong Liu, Pin Su, Zhongying Zhai, Zhuo Zhang, Haixing Yang, Jianping Dai, Bo Zhou, Deyong Zhang, Ju'e Cheng
  • Exopolysaccharide from Rhodopseudomonas palustris and Method for Preparing and Use Thereof
    Publication number: 20220042058
    Abstract: The invention discloses an exopolysaccharide from Rhodopseudomonas palustris and a method for preparing and use thereof, and the method for preparing comprises the steps of: 1) keeping a seed solution from Rhodopseudomonas palustris GJ-22 in a fermentation medium for fermentation culture to obtain a fermentation broth; 2) centrifuging the fermentation broth to take the supernatant, which is treated by alcohol precipitation after filtration, and then collecting the pellet from alcohol precipitation by centrifugation to obtain crude polysaccharide; 3) removing proteins from the rude polysaccharide using protease enzymolysis method and Sevag method, followed by dialysis treatment with distilled water to remove small molecules and organic solvent to obtain a polysaccharide sample; 4) purifying the polysaccharide sample through an anion exchange column and a molecular exclusion chromatography column obtain the exopolysaccharide from Rhodopseudomonas palustris.
    Type: Application
    Filed: November 20, 2020
    Publication date: February 10, 2022
    Applicants: Hunan Plant Protection Institute, Changsha Agreen Bio-Tech Ltd., Co., Suzhou Ace Chemical Technology Co., Ltd.
    Inventors: Yong LIU, Pin SU, Zhongying ZHAI, Zhuo ZHANG, Haixing YANG, Jianping DAI, Bo ZHOU, Deyong ZHANG, Ju'e CHENG