42 Research and development in the field of biomaterials science, namely, development of chitosan, textiles, bioplastics, waterproof membranes that are gas permeable, dissolvable biomembranes, and biodegradable films; Research and development in the field of textile fabric incorporating waterproof and gas permeable membrane made of expanded polytetrafluoroethylene (ePTFE) for the protection of sensitive equipment and packaging from contaminants