Most drugs on the market leave patients with undesirable symptoms and resistant pathogenic microorganisms, toxic effects related to these drugs and issues that restrict their use in many countries, therefore, much attention has been paid to herbal extracts and pharmacologically active molecules.Chitin is a natural polymer that is found in large quantities in nature, second only to cellulose, and is usually present in the polysaccharide structure of many invertebrate animals, mostly in marine crustaceans such as shrimp and crabs, with up to 40% of this polymer being found.
ThriftBooks sells millions of used books at the lowest
everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We
deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15.
ThriftBooks.com. Read more. Spend less.