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Science, New Series, Vol. 270, No. 5236, Oct. 27, 1995


Previous Issue: New Series, Vol. 270, No. 5235, Oct. 20, 1995
Next Issue: New Series, Vol. 270, No. 5237, Nov. 3, 1995


Front Matter (13 pp.)
Editorial: Strengthening Our Global Commitment, p. 559
Floyd E. Bloom


Letters
The Role of Experiments in Ecology, pp. 561-564
William J. Resetarits Jr.; Joseph Bernardo; Joshua Fischman
AIDS Intervention in Uganda, pp. 564-565
Maria J. Wawer; Ronald H. Gray; Thomas Quinn
Additional Reference, p. 565
Richard L. Ehman; James F. Greenleaf


Corrections and Clarifications: Asymmetrical Ability, p. 565
ScienceScope, p. 567
Jocelyn Kaiser


News and Comment
Max Planck Institutes Brace for Change, pp. 568-570
Patricia Kahn
Hubert Markl: Animal Behaviorist Puts His Learning to Work, p. 569
Robert Koenig
Galileo Lives with Balky Tape Recorder, p. 570
Richard A. Kerr
All Aboard the Space Station, p. 571
Michael Balter
Clinton Defends R&D in Partisan Speech, pp. 571-572
Andrew Lawler
Center for the Mind Pleases the Senses, p. 572
Jon Cohen
New Studies Trace the Impact of Tobacco Advertising, pp. 573-574
Rachel Nowak
Researchers Protest Attack on Tobacco Study, p. 573
Eliot Marshall
Rajewsky to Head EMBL's Italian Lab, p. 574
Nigel Williams


Research News
Antisense Has Growing Pains, pp. 575-577
Trisha Gura
Radio Tags Speed Compound Synthesis, p. 577
Robert F. Service
Defining the First Steps on the Path Toward Cell Specialization, pp. 578-579
Wade Roush
Evolutionary Biology: Animal Oddballs Brought Into the Ancestral Fold?, pp. 580-581
Richard A. Kerr
New Clue to Brain Wiring Mystery, p. 581
Marcia Barinaga


Random Samples, p. 583
Jocelyn Kaiser


Policy Forum
Freshwater Ecosystems and Their Management: A National Initiative, pp. 584-585
Robert J. Naiman; John J. Magnuson; Diane M. McKnight; Jack A. Stanford; James R. Karr


Perspectives
Reverse Weathering, Clay Mineral Formation, and Oceanic Element Cycles, pp. 586-587
Fred T. Mackenzie; Lee R. Kump
Metal-Carbon Bonds in Nature, pp. 587-588
Julie A. Kovacs; Steven C. Shoner; Jeffrey J. Ellison
Calcium Sparks in Vascular Smooth Muscle: Relaxation Regulators, pp. 588-589
Fredric S. Fay


Mechanisms for Lithium Insertion in Carbonaceous Materials, pp. 590-593
J. R. Dahn; Tao Zheng; Yinghu Liu; J. S. Xue

Neurotrophins and Neuronal Plasticity, pp. 593-598
Hans Thoenen


Research Article
Biostratigraphic and Geochronologic Constraints on Early Animal Evolution, pp. 598-604
John P. Grotzinger; Samuel A. Bowring; Beverly Z. Saylor; Alan J. Kaufman


Reports
Nano-Elastohydrodynamics: Structure, Dynamics, and Flow in Nonuniform Lubricated Junctions, pp. 605-608
Jianping Gao; W. D. Luedtke; Uzi Landman
Imaging Pattern Formation in Surface Reactions from Ultrahigh Vacuum up to Atmospheric Pressures, pp. 608-610
H. H. Rotermund; G. Haas; R. U. Franz; R. M. Tromp; G. Ertl
Nanoscale Complexity of Phospholipid Monolayers Investigated by Near-Field Scanning Optical Microscopy, pp. 610-614
Jeeseong Hwang; Lukas K. Tamm; Christine Böhm; Tirunelveli S. Ramalingam; Eric Betzig; Michael Edidin
Rapid Clay Mineral Formation in Amazon Delta Sediments: Reverse Weathering and Oceanic Elemental Cycles, pp. 614-617
Panagiotis Michalopoulos; Robert C. Aller
Limits to Relief, pp. 617-620
Kevin M. Schmidt; David R. Montgomery
Megascopic Multicellular Organisms from the 1700-Million-Year-Old Tuanshanzi Formation in the Jixian Area, North China, pp. 620-622
Zhu Shixing; Chen Huineng
Influence of Sulfide Inhibition of Nitrification on Nitrogen Regeneration in Sediments, pp. 623-625
Samantha B. Joye; James T. Hollibaugh
Cross-Arc Geochemical Variations in the Kurile Arc as a Function of Slab Depth, pp. 625-627
Jeffrey G. Ryan; Julie Morris; Fouad Tera; William P. Leeman; Andrei Tsvetkov
A Methylnickel Intermediate in a Bimetallic Mechanism of Acetyl-Coenzyme A Synthesis by Anaerobic Bacteria, pp. 628-630
Manoj Kumar; Di Qiu; Thomas G. Spiro; Stephen W. Ragsdale
T Cell Awareness of Paternal Alloantigens During Pregnancy, pp. 630-633
Anna Tafuri; Judith Alferink; Peter Möller; Günter J. Hämmerling; Bernd Arnold
Relaxation of Arterial Smooth Muscle by Calcium Sparks, pp. 633-637
M. T. Nelson; H. Cheng; M. Rubart; L. F. Santana; A. D. Bonev; H. J. Knot; W. J. Lederer
Localization of Protein Implicated in Establishment of Cell Type to Sites of Asymmetric Division, pp. 637-640
Fabrizio Arigoni; Kit Pogliano; Chris D. Webb; Patrick Stragier; Richard Losick
Activation of Cell-Specific Transcription by a Serine Phosphatase at the Site of Asymmetric Division, pp. 641-644
Leonard Duncan; Scott Alper; Fabrizio Arigoni; Richard Losick; Patrick Stragier
Central Command Neurons of the Sympathetic Nervous System: Basis of the Fight-or-Flight Response, pp. 644-646
Arthur S. P. Jansen; Xay Van Nguyen; Vladimir Karpitskiy; Thomas C. Mettenleiter; Arthur D. Loewy


Inside AAAS, pp. 647-649
Diana Parsell


Book Reviews
Invertebrate Immunology, p. 650
Phylogenetic Perspectives in Immunity. The Insect Host Defense
Jules A. Hoffmann; Charles A. Janeway, Jr.; Shunji Natori
Review author[s]: Gary W. Litman
Diffusion Phenomena, pp. 650-652
Chemical Waves and Patterns
Raymond Kapral; Kenneth Showalter
Review author[s]: Richard J. Field
Books Received, p. 652


Back Matter (52 pp.)

Previous Issue: New Series, Vol. 270, No. 5235, Oct. 20, 1995
Next Issue: New Series, Vol. 270, No. 5237, Nov. 3, 1995



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