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Science, New Series, Vol. 253, No. 5026, Sep. 20, 1991


Previous Issue: New Series, Vol. 253, No. 5025, Sep. 13, 1991
Next Issue: New Series, Vol. 253, No. 5027, Sep. 27, 1991


Front Matter (22 pp.)
Meeting Information Needs, p. 1333
Philip H. Abelson


Letters
Regulation of PCBs, p. 1334
Larry W. Robertson; Eric M. Silberhorn; Arthur L. Frank; Howard P. Glauert; J. P. Myers; T. Colborn; Thomas J. O'Shea
Sources of Acidity in Surface Waters, pp. 1334-1336
Edward C. Krug; Walter L. Warnick; L. A. Baker; A. T. Herlihy; P. R. Kaufmann; J. M. Eilers
Faux Pa, p. 1336
Carol McClain


ScienceScope, p. 1343
David P. Hamilton


News and Comment
Misconduct: Caltech's Trial by Fire, pp. 1344-1347
Leslie Roberts
Draft of Gallo Report Sees the Light of Day, pp. 1347-1348
Joseph Palca
Societies Complain About Ethics Rules, p. 1348
David P. Hamilton
USDA's Food Survey Riddled with Flaws, p. 1349
Eliot Marshall
Industrial R&D Plea, p. 1350
David P. Hamilton
A New Buzz in the Medfly Debate, p. 1351
Marcia Barinaga


Briefings
On the Trail of Genes for IQ, p. 1352
Constance Holden
UARS Launches Earth Mission, p. 1352
Constance Holden
Medical Gender Gap, p. 1352
Constance Holden
Bromley Worries About Engineering, p. 1353
Constance Holden
The Promiscuous Boy-Next-Door, p. 1353
Constance Holden
Thumbs Up for Monoclonal Drugs, p. 1353
Constance Holden
Mycomummy, p. 1353
Constance Holden


Research News
Ancient DNA: Still Busy After Death, pp. 1354-1356
Jeremy Cherfas
Straightening Out the Protein Folding Puzzle, pp. 1357-1358
Michelle Hoffmann
Making Choosy Molecules, p. 1358
Ivan Amato
An About-Face Found in the Ancient Ocean, pp. 1359-1360
Richard A. Kerr
Fetal Brain Signals Time for Birth, p. 1360
Joseph Palca


Perspective
Recognition of DNA by Cys2,His2 Zinc Fingers, pp. 1367+1393
Rachel E. Klevit


Establishment of the Mediterranean Fruit Fly in California, pp. 1369-1373
James R. Carey

Motions and Relaxations of Confined Liquids, pp. 1374-1379
Steve Granick

The Medial Temporal Lobe Memory System, pp. 1380-1386
Larry R. Squire; Stuart Zola-Morgan


Research Article
Reexamination of the Folding of BPTI: Predominance of Native Intermediates, pp. 1386-1393
Jonathan S. Weissman; Peter S. Kim


Reports
Molecular Origin of Io's Fast Sodium, pp. 1394-1397
Nicholas M. Schneider; John T. Trauger; Jody K. Wilson; David I. Brown; Robin W. Evans; Donald E. Shemansky
The Temperature of Cavitation, pp. 1397-1399
Edward B. Flint; Kenneth S. Suslick
The Role of Magma Overpressure in Suppressing Earthquakes and Topography: Worldwide Examples, pp. 1399-1402
Tom Parsons; George A. Thompson
Soil Carbon Isotope Evidence for Holocene Habitat Change in the Kenya Rift Valley, pp. 1402-1405
Stanley H. Ambrose; Nancy E. Sikes
Atomic Force Microscopy and Dissection of Gap Junctions, pp. 1405-1408
Jan H. Hoh; Ratneshwar Lal; Scott A. John; Jean-Paul Revel; Morton F. Arnsdorf
A Combinatorial Approach Toward DNA Recognition, pp. 1408-1411
Dehua Pei; Helle D. Ulrich; Peter G. Schultz
Oligoclonal Expansion and CD1 Recognition by Human Intestinal Intraepithelial Lymphocytes, pp. 1411-1415
Steven P. Balk; Ellen C. Ebert; Robin L. Blumenthal; Francis V. McDermott; Kai W. Wucherpfennig; Steven B. Landau; Richard S. Blumberg
A Mechanosensitive Channel in Whole Cells and in Membrane Patches of the Fungus Uromyces, pp. 1415-1417
Xin-Liang Zhou; Mary Ann Stumpf; Harvey C. Hoch; Ching Kung
Depletion of CD4+ T Cells in Major Histocompatibility Complex Class II- Deficient Mice, pp. 1417-1420
Michael J. Grusby; Randall S. Johnson; Virginia E. Papaioannou; Laurie H. Glimcher
Excitatory Synaptic Responses Mediated by GABAA Receptors in the Hippocampus, pp. 1420-1423
Hillary B. Michelson; Robert K. S. Wong
Negative Regulation of CD45 Protein Tyrosine Phosphatase Activity by Ionomycin in T Cells, pp. 1423-1425
Hanne L. Ostergaard; Ian S. Trowbridge


Technical Comments
Male Swords and Female Preferences, pp. 1426-1427
Jack da Silva; S. Todd Winquist; Daniel M. Weary; Alastair J. Inman; D. James Mountjoy; Elizabeth A. Krebs; Alexandra L. Basolo


Book Reviews
Molecules and Populations: A Revitalization, p. 1429
Evolution at the Molecular Level.
Robert K. Selander; Andrew G. Clark; Thomas S. Whittam
Review author[s]: Ross J. MacIntyre
Earthquake Assessment, pp. 1429-1430
Earthquake Hazard Analysis. Issues and Insights.
Leon Reiter
Review author[s]: Stewart W. Smith
Geologic Fluid Mechanics, pp. 1430-1431
Flow and Reactions in Permeable Rocks.
O. M. Phillips
Review author[s]: Leslie Smith
----------------, p. 1431
Tsunami Hazard. A Practical Guide for Tsunami Hazard Reduction.
E. N. Bernard
Review author[s]: K. L.
----------------, p. 1431
Body Composition in Biological Anthropology.
Roy J. Shephard
Review author[s]: K. L.
Books Received, pp. 1431-1432


Back Matter (24 pp.)

Previous Issue: New Series, Vol. 253, No. 5025, Sep. 13, 1991
Next Issue: New Series, Vol. 253, No. 5027, Sep. 27, 1991



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