salam dostan.yek mozoi ke to ketab nist va be nazaram moheme ro inja bayan mikonam.asare noe mavade hal shode dar aw:noe madee hal shode mesle ethanol,nacl,salt mixture...hast ke neshan mide be che megdar aw niaz darim.be bayane sadetar yanidar kodam aw microorganism ha roshd nemikonand.baraye...