omitted for clarity str2 poly n acetyl d glucosamine is a major component of naturally occurring chitin the naturally occurring material has not only the poly n acetyl d glucosamine but also inorganic salts thought to be forms of calcium carbonate and proteinaceous material the composition of which is not presently known the term 34 chitin 34 is used herein to refer to the various naturally occurring forms of chitin including the protein and inorganic carbonate components the term 34 purified chitin 34 is used to refer to chitin after purification to remove calcium carbonate and other inorganic salts and various proteins which may be present and is essentially poly n acetyl d glucosamine some confusion exists in the literature in that the name chitin is used as a name for poly n acetyl d glucosamine without specifying whether it is a naturally occurring material containing inorganic salts and proteins or whether the term is intended to designate purified poly n acetyl d glucosamine without specifying the degree of purity or the character of the impurities present the term 34 enzymatically degradable 34 refers to a form of poly n acetyl d glucosamine or its derivatives which is broken down into body fluid soluble components the problem of retention by the body or disposal is minimal or non existent one convenient method of sterilizing the present lubricant powder is by heat under such conditions that any microorganisms or deleterious materials are rendered inactive another common.