hydrogen must diffuse into
121Ulcerative colitis — Classification and external resources Endoscopic image of a bowel section known as the sigmoid colon afflicted with ulcerative colitis. The internal surface of the colon is blotchy and broken in places …
122Spa bath — Note that the term spa bath can also refer to a spa or hot tub. A spa bath basin of water having a temperature of up to 45 degrees Celsius (#expr: 45 *9/5+32 Fahrenheit), containing salts, herbal extracts or herbal oils, in which the hands, feet… …
123Future of an expanding universe — Big Freeze redirects here. For other uses, see Big Freeze (disambiguation). Physical cosmology Univ …
124energy conversion — ▪ technology Introduction the transformation of energy from forms provided by nature to forms that can be used by humans. Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy …
125Acid — This article is about acids in chemistry. For the drug, see Lysergic acid diethylamide. For other uses, see Acid (disambiguation). Acidity redirects here. For the novelette, see Acidity (Novelette). Acids and Bases …
126Lactose intolerance — Classification and external resources Lactose (disaccharide of β D galactose β D glucose) is normally split by lactase. ICD 10 …
127Nuclear fuel cycle — The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the front end, which are the preparation of the fuel, steps in the service period in which… …
128Membrane potential — Differences in concentration of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Many ions have a concentration gradient across the membrane, including potassium (K+), which is at a high inside and a… …
