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scientific american

scientific american   -  1993 01  -  the turbulent birth of the milky way

scientific american - 1993 01 - the turbulent birth of the milky way

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... the delicate bal-ance among symbionts is destroyed. SCIENTIFIC AMERICAN January 1993 65Copyright 1992 Scientific American, Inc. SCIENTIFIC AMERICAN January 1993 69tures. Although it appears ... homogeneous. SCIENTIFIC AMERICAN January 1993 75IRON ABUNDANCE (SOLAR UNITS)OXYGEN-TO-IRON RATIO (SOLAR UNITS)0.010.001 0.1 1.04321HALO STARSOLD DISK STARSCopyright 1992 Scientific American, ... Chaput; Vice Presi-dents: Jonathan Piel, John J. Moeling, Jr.10 SCIENTIFIC AMERICAN January 1993Copyright 1992 Scientific American, Inc.s a feminist in a family with Victo-rian mores and...
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scientific american   -  1993 02  -  beating resistance in superconductors

scientific american - 1993 02 - beating resistance in superconductors

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... zinc-centeredstructure devoted to DNA recognition.62 SCIENTIFIC AMERICAN February 1993Copyright 1993 Scientific American, Inc.68 SCIENTIFIC AMERICAN February 1993product; cilastatin does not. ... in the number of bases separating the half sites.64 SCIENTIFIC AMERICAN February 1993Copyright 1993 Scientific American, Inc.44 SCIENTIFIC AMERICAN February 1993the combined eÝect of environmentalproblems ... Bar-ger; Vice Presidents : Jonathan Piel, John J.Moeling, Jr.8 SCIENTIFIC AMERICAN February 1993Copyright 1993 Scientific American, Inc.three hydrophobic amino acids in vir-tually identical...
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scientific american   -  1993 03  -  black holes and the centrifugal force paradox

scientific american - 1993 03 - black holes and the centrifugal force paradox

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... forÒthings I donÕt understand.Ó40 SCIENTIFIC AMERICAN March 1993Copyright 1993 Scientific American, Inc. SCIENTIFIC AMERICAN March 1993 75Copyright 1993 Scientific American, Inc.an immune rejection ... human culture. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... SUBSTRATETRANSPARENTDISPLAYELECTRODEGATE (ROW) LINETRANSPARENTCOMMONELECTRODE LIGHTCopyright 1993 Scientific American, Inc. SCIENTIFIC AMERICAN March 1993 69Debris inhibitsdeck drainage.Standing water promotesdeck...
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scientific american   -  1993 04  -  controlling the quantum jitters of atoms

scientific american - 1993 04 - controlling the quantum jitters of atoms

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... buthighly disabling illnesses associated with old age. SCIENTIFIC AMERICAN April 1993 51Copyright 1993 Scientific American, Inc.82 SCIENTIFIC AMERICAN April 1993to establish and defend a nesting ... counseling Congress on technological issues.42 SCIENTIFIC AMERICAN April 1993ROBERT PROCHNOWCopyright 1993 Scientific American, Inc.48 SCIENTIFIC AMERICAN April 1993low levels for one average ... to medicine. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc....
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scientific american   -  1993 05  -  building soft machines from smart gels

scientific american - 1993 05 - building soft machines from smart gels

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... and depression. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... 515-247-7631. Postmaster: Send address changes to Scientific American, Box 3187, Harlan, Iowa 51537. Reprints available: write Reprint Department, Scientific American, Inc., 415 Madison Avenue, New York, ... relies on three drugs that converge on a viral molecule.18 SCIENTIFIC AMERICAN May 1993RICK FRIEDMAN Black StarCopyright 1993 Scientific American, Inc.¨Established 1845THE COVER painting provides...
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scientific american   -  1993 06  -  tuning in the radio signals of ancient galaxies

scientific american - 1993 06 - tuning in the radio signals of ancient galaxies

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... with autism. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... secreted are estradiol, a potentkind of estrogen, and progesterone. SCIENTIFIC AMERICAN June 1993 101Copyright 1993 Scientific American, Inc.Iam writing this article on a com-puter that contains ... Women36 SCIENTIFIC AMERICAN June 1993NAFIS SADIK, executive director of the U.N. Population Fund,notes Òall the preferences in our society are for men.ÓROBERT PROCHNOWCopyright 1993 Scientific American, ...
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scientific american   -  1993 07  -  telling resonable risks from fools' chances

scientific american - 1993 07 - telling resonable risks from fools' chances

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... Bar-ger ; Vice Presidents: Jonathan Piel, John J.Moeling, Jr.8 SCIENTIFIC AMERICAN July 1993PRINTED IN U.S.A.Copyright 1993 Scientific American, Inc.repolarize and prepare for Þring anew.Impulses ... THRESHOLDCopyright 1993 Scientific American, Inc.LETTERS TO THE EDITORSMore Black Hole ParadoxesI enjoyed ÒBlack Holes and the Cen-trifugal Force Paradox,Ó by Marek Ar-tur Abramowicz [SCIENTIFIC AMERICAN, March], ... workplace and consumerproducts.Second, these oÛcials have often40 SCIENTIFIC AMERICAN July 1993Copyright 1993 Scientific American, Inc....
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scientific american   -  1993 08  -  can particles move faster than light

scientific american - 1993 08 - can particles move faster than light

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... environment. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... 515-247-7631. Postmaster : Send address changes to Scientific American, Box 3187, Harlan, Iowa 51537. Reprints available: write Reprint Department, Scientific American, Inc., 415 Madison Avenue, New York, ... ; Vice Presidents: Jonathan Piel, John J.Moeling, Jr.6 SCIENTIFIC AMERICAN August 1993PRINTED IN U.S.A.Copyright 1993 Scientific American, Inc.plutonium for reactor fuel proves eco-nomically...
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scientific american   -  1993 09  -  special issue  -  life, death, and the immune system

scientific american - 1993 09 - special issue - life, death, and the immune system

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... CELLPLASMA CELLCopyright 1993 Scientific American, Inc.Copyright 1993 Scientific American, Inc.Copyright 1993 Scientific American, Inc.Copyright 1993 Scientific American, Inc.workers can identify ... garbage.Mathematical Recreations Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... 515-247-7631. Postmaster: Send address changes to Scientific American, Box 3187, Harlan, Iowa 51537. Reprints available: write Reprint Department, Scientific American, Inc., 415 Madison Avenue, New York,...
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scientific american   -  1993 10  -  is los angeles winning the war on smog

scientific american - 1993 10 - is los angeles winning the war on smog

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... in the brain. Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1993 by Scientific American, Inc. ... 1992 revealed thatthe number of employees per vehicle SCIENTIFIC AMERICAN October 1993 37Copyright 1993 Scientific American, Inc. 8SCIENTIFIC AMERICAN October 1993Simplify, SimplifyEssayist W. ... Lane from usinghis name to promote a shark cartilageproduct.24 SCIENTIFIC AMERICAN October 1993Copyright 1993 Scientific American, Inc.The T-1000Ña nearly indestruc-tible robot that was...
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scientific american   -  1993 11  -  reading the genes of extinct species

scientific american - 1993 11 - reading the genes of extinct species

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... think,Why not? ÑJohn Horgan38 SCIENTIFIC AMERICAN November 1993Copyright 1993 Scientific American, Inc. SCIENTIFIC AMERICAN November 1993 73Copyright 1993 Scientific American, Inc.glycine receptors, ... Iwould have to add that this is true forAfrican-Americans, Hispanic-Americans,female Americans, gay Americans, poorAmericans, handicapped Americans andother oppressed minorities. ÒSociety ... bombers).Battleship, 1941Continued on page 76Copyright 1993 Scientific American, Inc.Copyright 1993 Scientific American, Inc.12 SCIENTIFIC AMERICAN November 199350 AND 100 YEARS AGO0NOVEMBER 1943ÒAir-conditioning...
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scientific american   -  1993 12  -  taming africanized killer bees

scientific american - 1993 12 - taming africanized killer bees

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... X-RAYSCOMPTONOBSERVATORYRADIOTELESCOPEOPTICAL TELESCOPECopyright 1993 Scientific American, Inc.18 SCIENTIFIC AMERICAN December 1993hree years ago W. French Ander-son, then at the National ... safety,Ó Radlick boasts,Òand we got very good metabolic sup-32 SCIENTIFIC AMERICAN December 1993Copyright 1993 Scientific American, Inc.portÑenough to encourage us verystrongly to go into ... a viable and reliable treatment inits own right. ÑW. Wayt Gibbs SCIENTIFIC AMERICAN December 1993 33Copyright 1993 Scientific American, Inc.razilian lore has it that a red-haired, human-sized...
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scientific american   -  1994 01  -  searching for strange quark matter

scientific american - 1994 01 - searching for strange quark matter

Toán học

... DiversityColin Renfrew Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright © 1994 by Scientific American, Inc. ... wantedPROFILE: ALBERT EINSTEINKeyhole View of a Genius26 SCIENTIFIC AMERICAN January 1994FRED STEINBlack StarCopyright 1994 Scientific American, Inc.116124130The First Data Networks Gerard ... of bioactivemolecules in cyanobacteria and algae.Copyright 1994 Scientific American, Inc.SCIENCE AND THE CITIZEN SCIENTIFIC AMERICAN January 1994 17Joe BtfsplkNASAÕs big-science projects...
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scientific american   -  1994 02  -  do aerosols slow climatic warming

scientific american - 1994 02 - do aerosols slow climatic warming

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... Samuel R. Friedman Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright ©1994 by Scientific American, Inc.All ... power?Laid-Back Leader Rattles the Academy34 SCIENTIFIC AMERICAN February 1994CHRIS USHER Black StarCopyright 1994 Scientific American, Inc.70 SCIENTIFIC AMERICAN February 1994left at the scene ... 247-7631. Postmaster : Send address changes to Scientific American, Box 3187, Harlan, Iowa 51537. Reprints available: write Reprint Department, Scientific American, Inc., 415 Madison Avenue, New York,...
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scientific american   -  1994 03  -  visiting yourself in the past

scientific american - 1994 03 - visiting yourself in the past

Toán học

... im-Copyright 1994 Scientific American, Inc.Copyright 1994 Scientific American, Inc.Copyright 1994 Scientific American, Inc.Copyright 1994 Scientific American, Inc.32 SCIENTIFIC AMERICAN March 1994Clad ... Bernardo A. Huberman Scientific American (ISSN 0036-8733), published monthly by Scientific American, Inc., 415 Madison Avenue, New York, N.Y. 10017-1111. Copyright ©1994 by Scientific American, Inc.All ... 247-7631. Postmaster: Send address changes to Scientific American, Box 3187, Harlan, Iowa 51537. Reprints available: write Reprint Department, Scientific American, Inc., 415 Madison Avenue, New York,...
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