US 5,476,656 A · Substance BS-3

Abstract

Substance BS-3, a polysaccharide, produced by a microorganism belonging to the genus Klebsiella is disclosed, BS-3 having the following properties: main constituting sugar: rhamnose, galactose, glucose, and glucuronic acid; white to pale brown powder; easily soluble in water and sparingly soluble in methanol, ethyl acetate, benzene, etc.; viscosity: 1 to 8,000 cps; molecular weight: 1,000 to 10,000,000; positive in phenol-sulfuric acid reaction, carbazole-sulfuric acid reaction, Molisch's reaction, and ninhydrin reaction. BS-3 is useful as a heat-resistance stabilizer for a fat and oil emulsion and an anti-oxidant for fats and oils in an emulsion and also as an analgesic composition.

Claims7

Dependent claims

Substance BS-3 produced by a microorganism belonging to the genus Klebsiella, wherein the substance BS-3 has the following physicochemical properties:

(a) Appearance:
white to pale brown powder;
(b) Solubility:
easily soluble in water;
sparingly soluble in methanol, ethyl acetate, chloroform or benzene;
hydrolyzable with a mineral acid;
(c) Viscosity:
1 to 8,000 cps (0.8% aqueous solution;
30.degree. C.;
shear rate:
1.96 s.sup.-1);
(d) Main constituting sugar:
rhamnose:
10.6-25.7%, galactose:
16.8-31.0%,
glucose:
25.8-36.6%, glucuronic acid:
19.8-29.7%;
(e) Color reaction:
phenol-sulfuric acid reaction:
positive,
carbazole-sulfuric acid reaction:
positive,
Molisch's reaction:
positive,
ninhydrin reaction:
positive;
(f) Molecular weight:
1,000 to 10,000,000;
(g) Elemental analysis:
C:
30.0-40.0%, H:
4.0-6.0%, N:
0.0-1.0%;
(h) IR spectrum (KBr tablet):
3400. 2930, 1610, 1410, 1310, 1160, 1070, 1040, 930, 890, 790, 600.

33 more elements

Dependencies are inferred from the claim text.

Substance BS-3

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Substance BS-3

Life of this patent

Abstract

Claims7