Patents by Inventor Ningzi Guan

Ningzi Guan 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).

  • Method for improving acid tolerance of
    Patent number: 9187773
    Abstract: The invention provides a simple and effective method for improving acid tolerance of P. acidipropionici by adding arginine and/or aspartic acid to the culture medium. The acid tolerance of P. acidipropionici was improved by 60% and 20% respectively through adding arginine or aspartic acid into the culture medium. Consequently, PA production was improved by 36% and 26%, respectively. The maximal PA production was obtained by adding both 20 mM arginine and 20 mM aspartic acid. This method can be applied to large scale production of PA.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: November 17, 2015
    Assignee: Jiangnan University
    Inventors: Jian Chen, Guocheng Du, Long Liu, Jianghua Li, Ningzi Guan
  • Method for Improving Acid tolerance of Propionibacterium acdipropionici
    Publication number: 20140178952
    Abstract: The invention provides a simple and effective method for improving acid tolerance of P. acdipropionici by adding arginine and/or aspartic acid to the culture medium. The acid tolerance of P. acdipropionici was improved by 60% and 20% respectively through adding arginine or aspartic acid into the culture medium. Consequently, PA production was improved by 36% and 26%, respectively. The maximal PA production was obtained by adding both 20 mM arginine and 20 mM aspartic acid. This method can be applied to large scale production of PA.
    Type: Application
    Filed: October 7, 2013
    Publication date: June 26, 2014
    Inventors: Jian Chen, Guocheng Du, Long Liu, Jianghua Li, Ningzi Guan