Abstract: The invention relates to a method of controlling microorganisms adhered to surfaces in biological material, by administering substances which alter the water-structure binding capacity of surfaces and phase-boundaries.To remove micro-organisms from the surfaces, organic and inorganic salts are used in combination with organic polymers, preferably biopolymers, with positively and/or negatively charged groups such as amino groups and carboxyl groups.The invention also relates to compositions and preparations for performing the method, e.g. ointments, pastes and washing liquids containing the above-mentioned substances, as well as toothpaste containing one or more organic or inorganic salts together with the above-mentioned polymers.

Abstract: The adhesion of non-pathogenic bacteria to the stomach and intestines of humans and animals is increased by the administration of the bacteria in the presence of a protein, designated adhesive promoting protein, which can be produced by cultivating lactic acid bacteria in a medium with the addition of forms of sugar of enhanced concentration. A preparation to increase said adhesion contains non-pathogenic bacteria cultivated in the manner described above, together with adhesive promoting protein.

Abstract: A method for increasing pressure in geological oil-bearing structures by gas production due to microbial activity comprising adding to a geological oil-bearing structure, a methane producing aneorobic micro-organism, a culture medium and formic acid. The formic acid is converted to carbon dioxide and methane gases resulting in increased pressure in the structures.

Abstract: A method for increasing pressure in geological oil-bearing structures by gas production due to microbial activity comprising adding to a geological oil-bearing structure, an aneorobic micro-organism (Methanobacterium Termoautotroficum), a culture medium and formic acid. The formic acid is converted to carbon dioxide and methane gases resulting in increased pressure in the structures.