Already have an ACS ID? Log in
Renew your membership, and continue to enjoy these benefits.
Already an ACS Member? Log in here
Choose the membership that is right for you. Discounts will be applied automatically at checkout.
Enjoy these benefits no matter which membership you pick.
Most Popular in Physical Chemistry
Coal contains pores that can serve as a refuge for adsorbed methane. If the gas escapes during mining, it can cause explosions, so safety measures such as ventilation are key. This thin section of coal, shown at 100× magnification, demonstrates the material’s porosity. Mark Goodman, a retired Merck analytical chemist, received the coal along with several other rock samples from a geologist friend. He mounted the coal sample on a slide with epoxy and sanded it down until it was thin enough to allow light to shine through.
Submitted by Mark Goodman
Do science. Take pictures. Win money. Enter our photo contest here.
Related C&EN Content:
This article has been sent to the following recipient: