If blood isn’t able to flow unobstructed to the penis, it can prevent an erection, cause an erection to be lost prematurely, or reduce its overall hardness. Phosphodiesterase type 5 (PDE5 ...

Scientists from the National Institute of Advanced Industrial Science and Technology (AIST) in Japan have fabricated a wide-bandgap thin-film solar cell based on an indium-free chalcopyrite ...