Assimilation of inorganic selenium and organic germanium by yeast
US6368643B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Apr 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12R2001/85
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The yeast, Saccharomyces boulardii, has been used to invent a non-toxic selenium-germanium yeast product. Culture growth conditions can influence the biosorbent selenium and germanium uptake capacity. The invention involves assimilation of selenium and germanium by the yeast under optimal conditions of incubation time, biomass concentration, reaction pH, reaction medium, and feed rate. This yeast can assimilate higher intracellular selenium and germanium by either a one-step continuous feed-batch fermentation or a two-step continuous and semi-continuous feed-batch fermentation. The invention additionally involves the novel germanium and selenium-containing yeast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.