Word: nutrients
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...stopped the flow of silt down the Nile, which in the past offset the natural erosion of the land from the Nile delta. As a result, downstream erosion may wash away as much productive farm land as is opened up by new irrigation systems around Lake Nasser. Without the nutrient-rich silt reaching the Mediterranean, the Egyptian sardine catch declined from 18,000 tons in 1965 to 500 tons in 1968. As a final penalty, irrigation projects on the delta plain have allowed a moisture-loving snail to thrive. Since it carries schistosomiasis, most of the delta people have...
...Nikita Khrushchev was puzzled about what to do with his time. He tried photography, shooting the countryside around his dacha, outside Moscow. Then he tried teaching a jackdaw to talk. Now he has zeroed in on another hobby: hydroponics, the science of growing plants without soil, using pebbles and nutrient-loaded water. He has marked off some pebbled lots, built a system of pipes, and is growing tomatoes with a vengeance...
Funk put test pigeons on a rice diet. First he fed them polished rice; then natural rice, with all its bran coating. When the pigeons got the coating they thrived; when they did not they suffered from polyneuritis. Obviously, the bran-fed pigeons were getting a nutrient that the others were not. Funk concentrated the nutrient, now known as vitamin...
...patient's suffering. But Dr. Sidney Farber of the Children's Hospital Medical Center in Boston was just then beginning the first tentative treatment of childhood leukemia with a drug called methotrexate that interferes with the metabolism of cancerous cells, in effect starving them of a vital nutrient. It was to commemorate the 20th anniversary of that occasion that the American Cancer Society and the National Cancer Institute picked Boston as the place to make their reports last week...
Siegel and his associates incubated the soil in a hostile ammoniac atmosphere, and fed it with a nutrient broth. Within weeks, there appeared a strange microorganism, umbrella-shaped, with radiating spokes and a stalk terminating in a bulb. Though unfamiliar with anything like it, Siegel noted that the organism flourished amid conditions resembling the ammonia-laden atmosphere that probably prevailed on earth when the earliest forms of life were developing, some 3 billion years...