Patents Assigned to Ultra Biotech Limited
  • Methods and compositions for suppressing growth of algae
    Patent number: 6391619
    Abstract: Compositions comprising a plurality of yeast cells, wherein said plurality of yeast cells have been cultured in the presence of an alternating electric field having a specific frequency and a specific field strength for a period of time sufficient to substantially increase the capability of said plurality of yeast cells to suppress the growth of algae or decompose debris of algae. Also included are methods of making such compositions.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: May 21, 2002
    Assignee: Ultra Biotech Limited
    Inventor: Ling Yuk Cheung
  • Yeast compositions for converting bio-available nitrogen in a culture medium to intracellular nitrogen
    Patent number: 6391617
    Abstract: Compositions comprising a plurality of yeast cells, wherein said plurality of yeast cells have been cultured in the presence of an alternating electric field having a specific frequency and a specific field strength for a period of time sufficient to substantially increase the capability of said plurality of yeast cells to convert bio-available nitrogen in a culture medium into their own biomass. Also included are methods of making such compositions.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: May 21, 2002
    Assignee: Ultra Biotech Limited
    Inventor: Ling Yuk Cheung