Colloidal sized metal-polysaccharide particles
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United States of America Patent
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May 17, 1988
Grant Date -
N/A
app pub date -
Jan 14, 1985
filing date -
Apr 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Colloidal sized particles comprising metal particle coated with a water soluble polysaccharide derivative. The derivative is such that when it is not coating the metal, it has at least one, and preferably a number, of pendant functional groups each of which has a positive charge in aqueous solution. The metal is preferably selected from the group consisting of gold, platinum, and silver, whereas the polysaccharide may usefully be selected from the group consisting of dextran and mannan. The particles can be used as markers for biologically active molecules, or for separating different types of such molecules.
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