Abstract: An object of the present invention is to provide a lipopolysaccharide production method that contributes to labor hygiene and environmental conservation and is suited for large-scale production and a lipopolysaccharide produced thereby. The present invention relates to a lipopolysaccharide production method, etc., with which a lipopolysaccharide is extracted and purified from gram-negative bacterium and is a lipopolysaccharide production method that includes a first step of performing extraction from the gram-negative bacterium using hot water to obtain an extract liquid that contains the lipopolysaccharide and a second step of purifying the extract liquid or a solution containing the LPS in the extract liquid by using reverse-phase liquid chromatography to obtain the lipopolysaccharide and in that a reverse-phase column used in the reverse-phase liquid chromatography has a packing material constituted of a material having a functional group of 1 to 8 carbons.

Abstract: A readily-available brain function-improving agent or food composition having an A? intracerebral deposition suppressing effect or a learning function-improving effect is provided based on finding, as a result of orally administering Pantoea LPS to Alzheimer's disease model mice and studying the effects, that oral administration of Pantoea LPS significantly decreased intracerebral A? peptide accumulation and improved learning function.

Abstract: It has been found that a limulus-positive glycolipid is present in xanthan gum derived from Xanthomonas, which has been commercially available and eaten for many years, and this was purified, and it has been found that this limulus-positive glycolipid has an immunopotentiation effect. A method for safely and inexpensively producing the limulus-positive glycolipid containing an immunopotentiator at high concentrations is provided. The method for producing the limulus-positive glycolipid of the present invention comprises extracting the limulus-positive glycolipid from xanthan gum. A limulus-positive glycolipid composition containing the limulus-positive glycolipid can be used for various applications such as pharmaceuticals, pharmaceuticals for animals, quasi drugs, cosmetics, foods, functional foods, feedstuff and bath agents.

Abstract: It has been found that a limulus-positive glycolipid is present in xanthan gum derived from Xanthomonas, which has been commercially available and eaten for many years, and this was purified, and it has been found that this limulus-positive glycolipid has an immunopotentiation effect. A method for safely and inexpensively producing the limulus-positive glycolipid containing an immunopotentiator at high concentrations is provided. The method for producing the limulus-positive glycolipid of the present invention comprises extracting the limulus-positive glycolipid from xanthan gum. A limulus-positive glycolipid composition containing the limulus-positive glycolipid can be used for various applications such as pharmaceuticals, pharmaceuticals for animals, quasi drugs, cosmetics, foods, functional foods, feedstuff and bath agents.

Abstract: It has been found that a limulus-positive glycolipid is present in xanthan gum derived from Xanthomonas, which has been commercially available and eaten for many years, and this was purified, and it has been found that this limulus-positive glycolipid has an immunopotentiation effect. A method for safely and inexpensively producing the limulus-positive glycolipid containing an immunopotentiator at high concentrations is provided. The method for producing the limulus-positive glycolipid of the present invention comprises extracting the limulus-positive glycolipid from xanthan gum. A limulus-positive glycolipid composition containing the limulus-positive glycolipid can be used for various applications such as pharmaceuticals, pharmaceuticals for animals, quasi drugs, cosmetics, foods, functional foods, feedstuff and bath agents.

Abstract: It has been found that a limulus-positive glycolipid is present in xanthan gum derived from Xanthomonas, which has been commercially available and eaten for many years, and this was purified, and it has been found that this limulus-positive glycolipid has an immunopotentiation effect. A method for safely and inexpensively producing the limulus-positive glycolipid containing an immunopotentiator at high concentrations is provided. The method for producing the limulus-positive glycolipid of the present invention comprises extracting the limulus-positive glycolipid from xanthan gum. A limulus-positive glycolipid composition containing the limulus-positive glycolipid can be used for various applications such as pharmaceuticals, pharmaceuticals for animals, quasi drugs, cosmetics, foods, functional foods, feedstuff and bath agents.