All rights reserved. Terms of use. Â¨ 37 11 Thermodynamics andThermochemistry Thermodynamics is the study of heat, and how heat can be interconverted into other energyforms. In thermodynamics the system is a specific part of the universe that is being studied,often the system is a chemical reaction. The surroundings are all parts of the universe that arenot the system, typically everything outside the test tube.Â¥ An open system can exchange both energy and matter with its surroundings.
Pepsin has been used as a substitute for rennin in the production of certain cheeses. Treatment of hides. Pepsin is used by the leather industry to remove undesirable traces of remaining tissue, such as hair and fat, from partially processed hides. This enzymatic treatment is called âbatingâ the hides.
Instructions. 1  Pepsin Pepsin is âan inactive form of pepsinogen that is produced in the stomachâ. 2  It activates only during the digestion process and breaks down the proteins in the food into components like peptones, proteoses and polypeptides.nlike pepsin, pepsinogen can be converted to pepsin by hydrochloric acid (HCL). Pepsinogenâs secretion is stimulated by histamine, vagal stimulation and gastrin, whereas the same is not the case with pepsin. Moreover, pepsinogen is constant in both alkaline and natural solutions, while pepsin is not.