Word: biologist
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Died. Gregory Goodwin Pincus, 64, research director of the Worcester Foundation for Experimental Biology and a brain father of birth control pills; of myeloid metaplasia, a blood disease; in Boston. A brilliant biologist, Pincus first won national attention in 1939 by inducing a "fatherless" mammalian birth (a lab-fertilized rabbit egg); then in the 1950s, with Harvard Gynecologist John Rock, successfully tested an ovulation depressant called progestin, which came on the market in 1960 as Enovid. At his death, Pincus was testing yet another idea: a "morning after" pill, which keeps fertilized eggs from settling in the womb...
Leader of the expedition that stum bled on the river of insecticide was Harvard Biologist Carroll M. Williams, 50. Recently Williams has been work ing with hormones that are secreted by insects to permit and regulate growth and maturation from egg to larva to pupa to adult. If insect juvenile hor mone comes in contact with larvae at the wrong stage of development, the in sects will not mature. When insects at later stages are treated with growth hor mone, they are killed by developing at too rapid a rate. Moreover, Williams .and other researchers have discovered that lethal equivalents...
...such great numbers every spring that they exhaust the oxygen supply in their immediate vicinity and suffocate. Others suggest that plankton-tiny water plants and animals on which alewives feed-suddenly begin dying just as the fish are crowding into coastal waters in the spring. U.S. Fish and Wildlife Biologist Melvin Greenwood theorizes that the alewives are killed by sudden temperature drops caused by violent spring storms that drive colder waters from the center of Lake Michigan into the shore areas...
...cold belt now extends out 40 miles," says Smith, "and out there the water's too clear and the fish avoid the net." Aggravating the situation is the fact that fishermen, unable to net menhaden at sea, have moved into the spawning fields of Chesapeake Bay. According to Biologist Kenneth Henry of North Carolina's Bureau of Fisheries, 94% of the fish caught north of Cape Hatteras in 1966 had not spawned...
Bursting Bacteria. In an equally complex experiment with the same type of bacteria cells, Harvard Molecular Biologist Mark Ptashne discovered a second represser - a smaller protein molecule that prevents the bacteria from bursting when they are attacked by viruses. Ptashne's experiment also indicated that the represser turned off the appropriate cell genes by binding itself tightly to them, somehow preventing the production of an enzyme in the process...