DALLAS â September 3, 2014 â Americans paid an average of $137 per night for hotel accommodations in the U.S. during the first six months of 2014 â an increase of five percent compared to the same period in 2013 â according to the latest data from the biannual Hotels.comÂ® Hotel Price Indexâ¢ (HPIÂ®) .ALLAS â September 3, 2014 â Americans paid an average of $137 per night for hotel accommodations in the U.S. during the first six months of 2014 â an increase of five percent compared to the same period in 2013 â according to the latest data from the biannual Hotels.comÂ® Hotel Price Indexâ¢ (HPIÂ®) .
The energy used in the electron transport change pumps protons across the inner mitochondrial membrane from the inner matrix to the intermembrane space, producing a strong hydrogen concentration gradient.
Electron transport provides energy for the synthesis of ATP, but only indirectly. When electron transport chains pump. H+ across the membrane, the protons become more concentrated on one side of the membrane than on the other. Such a. concentration gradient stores potential energy.