Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Acetate and hydrogen formation by S. sphaeroides cells and cell-free spent culture medium on graphite cathodes poised at −500 mV. (a) Only intact cells of S. sphaeroides (filled triangles) form acetate. (b) Cell-free spent culture medium (SCM; open triangles) and intact cells (filled triangles) form H2 initially, but H2 accumulates to higher concentrations only without intact cells. Open circles, medium control; stars, heat-inactivated SCM controls.
