scientific american special edition - 1997 vol08 no2 - solid - state century

... American: The Solid- State Century Copyright 1997 Scientific American, Inc. The Transistor Scientific American: The Solid- State Century 21 ILLUSTRATIONS BY JAMES LEWICKI Copyright 1997 Scientific American, ... TECHNOLOGIES Copyright 1997 Scientific American, Inc. The Transistor Scientific American: The Solid- State Century 19 JAMES LEWICKI Copyright 1997...

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... gradual and sustained decrease in CRH secre- tion and other HPA-axis functions, in- dicating that down-regulation of im- portant components of the stress re- sponse is an intrinsic effect of imipramine. Depression ... messenger called in- terleukin-1 (IL-1), which ordinarily will not pass through the blood-brain barrier. But certain cere- bral blood vessels contain leaky junctions, which allo...

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... and sexual be- havior of 1 5- to 19-year-olds. The survey The female condom’s manufac- turer, the Female Health Com- pany, reports that the plastic vaginal sheath is 79 to 95 per- cent effective ... Diane McGarvey, DIRECTOR Scientific American, Inc. 415 Madison Avenue • New York, NY 1001 7-1 111 (212) 75 4-0 550 PRINTED IN U.S.A. 2Scientific American Presents PRESENTS ® Speci...

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... hole Supernova Ultraviolet radiation COPYRIGHT 2002 SCIENTIFIC AMERICAN, INC. form. Dust grains and molecules con- taining heavy elements cool the present- day clouds much more efficiently to tem- peratures of only about ... predicted masses of the first star-form- ing clumps are not very sensitive to the as- sumed cosmological conditions (for ex- ample, the exact nature of the initial den-...

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... graduate student Yohannes Haile-Selassie announced the discovery of slightly younger fossils from Ethiopia’s Middle Awash region. Those 5.2-million- to 5.8-million-year-old re- mains, which have been ... discovered. 14 SCIENTIFIC AMERICAN Updated from the June 1997 issue early hominid fossils from AFRICA The year was 1965. ORIGINS COPYRIGHT 2003 SCIENTIFIC AMERICAN, INC. www.sciam.c...

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... images at right) is a 500-kilometer-long thrust fault probably created when parts of Mercury’s core solidi- fied and shrank. Day- break seen from in- side the scarp is prob- ably a stirring sight (below, ... (bottom left); DON DIXON (bottom right) Copyright 1998 Scientific American, Inc. Copyright 1998 Scientific American, Inc. Copyright 1998 Scientific American, Inc. SOHO Reveals t...

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... I expe- rience severe nitrogen narcosis in the dark underneath the stern of the wreck of the fa- mous Japanese battleship Naga- to. The 216-meter-long flag- ship of the Imperial Navy dur- ing ... counter- rotating sets of currents. Hugging Antarctica and streaming from east to west is the so-called East Wind Drift. Farther north, the eastward-di- rected Antarctic Cir- cumpolar Current pre- vai...

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