It can be useful to regulate the growth of microbial cells. Some embodiments herein provide genetically engineered microbial cells that can produce bacteriocins to control the growth of microbial cells. In some embodiments, microbial cells are contained within a desired environment. In some embodiments, contaminating microbial cells are neutralized. In some embodiments, a first microbial cell type regulates the growth of a second microbial cell type so as to maintain a desired ratio of the two cell types.

It can be useful to regulate the growth of microbial cells. Some embodiments herein provide genetically engineered microbial cells that can produce bacteriocins to control the growth of microbial cells. In some embodiments, microbial cells are contained within a desired environment. In some embodiments, contaminating microbial cells are neutralized. In some embodiments, a first microbial cell type regulates the growth of a second microbial cell type so as to maintain a desired ratio of the two cell types.

The present invention relates to a composition comprising a growth medium comprising a carbon source, a nitrogen source, a sulphur containing amino acid and Ferric pyrophosphate; wherein the growth medium has no blood; wherein the growth medium is configured to allow growth of a living microorganism. Further, the invention also relates to method to prepare the composition.

The present invention relates to a processed food composition containing, as an active ingredient, psicose, which is a saccharide having the function of stimulating a daidzein conversion into equol by an intestinal microorganism in the human body.

The present invention relates to a processed food composition containing, as an active ingredient, psicose, which is a saccharide having the function of stimulating a daidzein conversion into equol by an intestinal microorganism in the human body.

Disclosed herewith is a method of providing N-hydroxycarboxamide compound-based metabolic inhibitor composition, which has demonstrated efficacy for inhibiting sulfide production, under anaerobic conditions. This composition is suitable for use in downhole, drilling and exploration application environments and other harsh environment applications, including mining, industrial extraction of metals and sewage treatment, as well as non-harsh environment applications.

Disclosed herewith is a method of providing N-hydroxycarboxamide compound-based metabolic inhibitor composition, which has demonstrated efficacy for inhibiting sulfide production, under anaerobic conditions. This composition is suitable for use in downhole, drilling and exploration application environments and other harsh environment applications, including mining, industrial extraction of metals and sewage treatment, as well as non-harsh environment applications.

Described are methods and means for metabolic engineering and improved product formation by a filamentous micro-organism or a low G+C gram-positive bacterium. Disclosed is that DasR and DasR binding sites play an important and universal role in the control of gene expression in micro-organisms. Based on this finding, provided are multiple useful applications, such as a method for regulating the expression of a gene of interest, a method for controlling metabolism, a method for decreasing undesired expression and many more. Moreover, provided are means that can be used to establish said methods: for example a micro-organism in which the DasR binding site in operable linkage with a particular gene has been modified to obtain increased or decreased expression of a protein (being a desired or undesired protein) encoded by said gene.

Described are methods and means for metabolic engineering and improved product formation by a filamentous micro-organism or a low G+C gram-positive bacterium. Disclosed is that DasR and DasR binding sites play an important and universal role in the control of gene expression in micro-organisms. Based on this finding, provided are multiple useful applications, such as a method for regulating the expression of a gene of interest, a method for controlling metabolism, a method for decreasing undesired expression and many more. Moreover, provided are means that can be used to establish said methods: for example a micro-organism in which the DasR binding site in operable linkage with a particular gene has been modified to obtain increased or decreased expression of a protein (being a desired or undesired protein) encoded by said gene.

A process of removing SO.sub.2 from a flue gas with a trickling filter using modified ceramsite packing is described. The biological flue gas desulfurization process includes: feeding the flue gas containing sulfur dioxide through the column bottom into the biomembrane trickling filter at certain temperature, contacting with the modified ceramsite biomembrane packing and purifying, which purified flue gas is discharged via the column top; and spraying the nutrient fluid rich in high concentration of the desulfurization strain through the top to the modified ceramsite biomembrane packing, thereby the sulfur-bearing pollution source in the flue gas is degraded, so as to discharge a purified flue gas satisfying the environmental requirements.