adhesives: while I’m staying away from organics for now, as my text is listing them nicely as examples, I’ll post for when I’m read to refer:
“Three prominent classes of natural adhesives include
and natural rubber (mainly cis-polyisoprene).
Three specific examples are:
starch, a carbohydrate;
gelatin, a protein;
and rubber cement made from natural rubber.”
_Adhesives Technology Handbook, 3rd edition_