COMPARISON COLLAGEN CONTENT OF THE SHELL OF A CLAM BLOOD(ANADARA GRANOSA) ANDSHELL OF CLAM GREENS(MYTILUS VIRIDIS) IN BANDENGAN, KENDAL, CENTRAL JAVA

Collagen is a major component of white connective tissue (white connective tissue) that covers nearly 30% of total protein in vertebrate organs and invertebrates. Collagen is a large molecular protein, a major component of the skin. More than 71% of skin protein is collagen. One source of collagen that can be used and not yet utilized is the shells of shells and shells of clam green. The use of collagen derived from animals that live in the air can be a promising alternative, given the usual commercial collagen of cowhide, pig skin, or chicken skin.The population in this study is the shell of blood clams (Anadaragranosa) and the shells of clam green (Mytilusvaridis) taken from the fish auction site in Bandengan, Kendal. Samples will be treated differently to the concentration of acetic acid dancer fluid and the extraction time which will affect the yield of collagen produced.The research design used was pre experiment. Only one case design/case study is treated/ intervened.  The study was analyzed comparatively ie the effectiveness of acetic acid and the immersion time in yield of collagen yield from the shells and shells of clam greens. Data is processed and analyzed using spss with t-test.There is no difference in average levels of collagen shells of clams of blood and shells of green shells. The acetic acid treatment of 0,75 M resulted in the highest yield of 2,03% for the shells of clams and 1,96% for the shells of green shells. Treatment of 2 days extraction time yields the highest yield of 1,74% for the shells of clam and 1,85% for the shells of green shells.