Word: hydrogenating
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...poor design and construction. Radioactive particles collected by high-flying airplanes may soon provide an answer, however, for the particles prattle all sorts of secrets: whether the fissionable material used was plutonium or U-235; how much of it was wasted; whether an attempt was made to get fusion (hydrogen bomb) action...
...four-ring cluster of carbon atoms, known as "the steroid nucleus." Other attached atoms give each steroid its distinctive character (see diagram). By growing rat-liver cells in the test tube, Dr. Bloch learned that they make cholesterol from the much simpler acetate ion (acetic acid minus a hydrogen ion). "My work since then," he says, "has been on the processes that the cell uses to manufacture the cholesterol molecule. This is a fantastically complex sequence of approximately 36 biochemical reactions." Bloch adds with a grin: "It was a great temptation to call it The 39 Steps...
...water into the Charles at its mouth, the river has divided into two layers: a stagnant upper layer of fresh water and a deoxygenated lower layer of salt water. Sewage drained into the Charles falls to the bottom where it decomposes; because there is little oxygen, this decomposition produces hydrogen sulfide. And hydrogen sulfide smells...
...result, the river has divided into a stagnant upper layer of fresh water and a deoxygenated lower layer of salt water. The sewage which is drained into the Charles falls to the bottom, where it decomposes. Since there is not enough oxygen, this decomposition produces hydrogen sulfide, which gives off the now-familiar smell or rotten eggs...
...they cause in the stars around which they revolve. Dr. Brown estimates that 10,000 cubic parsecs of space contain 12,730 invisible bodies with sizes ranging from one-sixth the mass of the sun down to "earth equivalent"-the mass that the earth would have if its original hydrogen and other gases had not been driven off by the heat of the nearby sun. Small bodies down to "Mars equivalent" number 60,330, which makes them 60 times as common as luminous, visible stars...