One of the challenges to scaling up the process, he notes, will be developing new materials for fuel cell membranes that won't quickly become clogged with the chemical byproducts of bacterial activity, which would cut down on the flow of ions that help maintain the voltage difference across the membranes. (sciencemag.org)
One of those ducts becomes clogged if milk builds up and forms a blockage. (rachelsremedy.com)
Zinc also reduces keratin production, which helps prevent pores from becoming clogged, kills bacteria on the skin, and even reduces testosterone — the main hormone that causes acne when in excess. (mindbodygreen.com)