Resources Contact Us Home
Solid, water-insoluble polypeptides having ionizable side chains

Image Number 2 for United States Patent #3948863.

Solid bodies of polypeptides having repeating units of aspartic, glutamic, and aminoadipic esters are reacted with hydrazine or an amine having at least two NH.sub.2 groups until the ester moieties of the side chains are partly converted to the hydrazines or amides, and the side chains are partly crosslinked hydrazides other units by reaction with the hydrazine or diamine so as to make the polypeptide insoluble and infusible. The remaining ester moieties are saponified, and the resulting hydrophilic, but water-insoluble solid acts as an ampholyte in contact with water or other polar solvents. It may be used for capturing heavy metal ions from their aqueous solutions.

  Recently Added Patents
Spoofing detection for civilian GNSS signals
Press nut
MOS device for eliminating floating body effects and self-heating effects
Implementing state-of-the-art gate transistor, sidewall profile/angle control by tuning gate etch process recipe parameters
Input system including position-detecting device
Efficient forward ranking in a search engine
Anti-GITR antibodies
  Randomly Featured Patents
Spiral binding apparatus
Method and apparatus for liquid crystal display with intermediate tone
Alkoxysilane dryer for crosslinkable polymer compounds
Mounting system for a deceleration sensor
Continuous casting process
Decorative lights retaining clip
Tape threading apparatus having take-up hub with gap filling block for data storage systems and method therefor
Speaker phones
Folding wheelchair