Word: growed
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Dates: during 1950-1959
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...Communist domination, there are still an estimated 1,000 Protestant and 5,000 Roman Catholic foreign missionary workers in China. But now that the Communist government has rung down the Bamboo Curtain on U.S. activities in China (TIME, Jan. 8), many of the sowers must leave the seed to grow or wither without their care...
Sleeping Pupa.The three "cytochrome" enzymes are basic growth factors. Present in human beings as well as in silkworms, they control the utilization of oxygen in the tissues. Without them growth is impossible. The dormant Cecropia pupa contains no cytochrome enzymes. Therefore it cannot grow until they are provided by the chain of hormones that starts in its brain...
Silkworms are a long way from human problems, but Dr. Williams' work was largely supported by cancer research funds, because a cure for cancer may depend upon a better understanding of growth. Cancer cells grow lawlessly, defying the hormone controls that limit the growth of ordinary cells. By working out in detail the hormone system that governs the silkworm's metamorphosis. Dr. Williams has helped explain both lawful and lawless growth within the human body...
Another Harvard man, Dr. Marcus Singer, professor of neuroanatomy at the Harvard Medical School, approached the growth problem from another angle: the nerves of amphibians. Newts and salamanders can grow new legs and tails with the greatest of ease. Tadpoles can do the trick too. But when they grow up to be frogs, their more complex bodies can no longer regenerate new members...
About six years ago, Dr. Singer was making experiments on the nervous systems of newts. His chief interest was the nerves themselves, but in the course of the experiments he found out that if he damaged the nerves in the stump of an amputee newt, the newt failed to grow a new limb. Dr. Singer concluded that a hitherto neglected function of the nerves, the promotion and control of growth, was responsible. He decided to experiment further...