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Science, New Series, Vol. 276, No. 5312, Apr. 25, 1997


Previous Issue: New Series, Vol. 276, No. 5311, Apr. 18, 1997
Next Issue: New Series, Vol. 276, No. 5313, May 2, 1997


Front Matter (19 pp.)
Editorial: Improved Fossil Energy Technology, p. 511
Philip H. Abelson


Letters
Misplaced Crabs, p. 513
Hugh Smith; Gordon A. Fox; John K. Pope
Tritium Supply, p. 513
Harold M. Agnew
Rutherford's Contribution, p. 513
Alexander Small
Endangered Species "Hot Spots", pp. 513-517
Christopher P. Dunn; Marlin L. Bowles; George B. Rabb; Kris S. Jarantoski; David Ehrenfeld; Reed F. Noss; Gary K. Meffe; A. Dobson; J. P. Rodriguez; W. M. Roberts; D. S. Wilcove


Corrections and Clarifications, p. 517
ScienceScope, p. 519
Jocelyn Kaiser


News and Comment
AIDS Trials Ethics Questioned, pp. 520-523
Jon Cohen
Publishing Sensitive Data: Who Calls the Shots?, pp. 523-526
Wade Roush; Eliot Marshall; Gretchen Vogel
Warnings Precede Chinese Temblors, p. 526
Li Hui; Richard A. Kerr
Merck Gives Researchers Knockout Deal, p. 527
Elizabeth Pennisi
Report Says ITER Ignition Not Assured, p. 527
Andrew Lawler


Research News
The Telomerase Picture Fills in, pp. 528-529
Marcia Barinaga
Visible 'Source' Teases Observers, pp. 529-530
James Glanz
Doubts Greet Claim of Cosmic Axis, p. 530
James Glanz
Possible Function Found for Breast Cancer Genes, pp. 531-532
Jean Marx
New Test Sizes Up Randomness, p. 532
Charles Seife
New Vaccines May Ward Off Urinary Tract Infections, p. 533
Robert F. Service
Putative Cancer Gene Shows Up in Development Instead, pp. 534-535
Wade Roush
Ideas on Human Origins Evolve at Anthropology Gathering, pp. 535-536
Ann Gibbons


Random Samples, pp. 537+539
Constance Holden


Book Reviews
Vertebrates Ashore, p. 541
Amniote Origins. Completing the Transition to Land.
Stuart S. Sumida; Karen L. M. Martin
Review author[s]: John A. Ruben
Nerve Cells with Names, pp. 541-542
The Neurobiology of an Insect Brain.
Malcolm Burrows
Review author[s]: Sasha N. Zill


Perspectives
Putting Molecules Behind Bars, pp. 543-544
Steven C. Zimmerman
The Rise of Plants and Their Effect on Weathering and Atmospheric CO2, pp. 544-546
Robert A. Berner
Ribozymes in Wonderland, pp. 546-547
Andrew D. Ellington; Michael P. Robertson; Jim Bull
Seeing the Synapse, p. 547
Katrina L. Kelner


Policy Forum
Current Problems and the Future of Antiretroviral Drug Trials, pp. 548-550
Joep M. A. Lange


U-Th Isotopes in Arc Magmas: Implications for Element Transfer from the Subducted Crust, pp. 551-555
C. J. Hawkesworth; S. P. Turner; F. McDermott; D. W. Peate; P. van Calsteren


Research Articles
Antarctic Tectonics: Constraints from an ERS-1 Satellite Marine Gravity Field, pp. 556-560
David McAdoo; Seymour Laxon
Reverse Transcriptase Motifs in the Catalytic Subunit of Telomerase, pp. 561-567
Joachim Lingner; Timothy R. Hughes; Andrej Shevchenko; Matthias Mann; Victoria Lundblad; Thomas R. Cech


Reports
Vesicle-Specific Noble Gas Analyses of "Popping Rock": Implications for Primordial Noble Gases in Earth, pp. 568-571
Pete Burnard; David Graham; Grenville Turner
Climatic Limits on Landscape Development in the Northwestern Himalaya, pp. 571-574
Nicholas Brozović; Douglas W. Burbank; Andrew J. Meigs
Nanoporous Molecular Sandwiches: Pillared Two-Dimensional Hydrogen-Bonded Networks with Adjustable Porosity, pp. 575-579
Victoria A. Russell; Cara C. Evans; Wenjie Li; Michael D. Ward
Scanning Single-Electron Transistor Microscopy: Imaging Individual Charges, pp. 579-582
M. J. Yoo; T. A. Fulton; H. F. Hess; R. L. Willett; L. N. Dunkleberger; R. J. Chichester; L. N. Pfeiffer; K. W. West
Early Forest Soils and Their Role in Devonian Global Change, pp. 583-585
Gregory J. Retallack
Neurogenesis in Postnatal Rat Spinal Cord: A Study in Primary Culture, pp. 586-589
Lois J. Kehl; Carolyn A. Fairbanks; Tinna M. Laughlin; George L. Wilcox
Control of Inflammation, Cytokine Expression, and Germinal Center Formation by BCL-6, pp. 589-592
Alexander L. Dent; Arthur L. Shaffer; Xin Yu; David Allman; Louis M. Staudt
Activation of Auditory Cortex During Silent Lipreading, pp. 593-596
Gemma A. Calvert; Edward T. Bullmore; Michael J. Brammer; Ruth Campbell; Steven C. R. Williams; Philip K. McGuire; Peter W. R. Woodruff; Susan D. Iversen; Anthony S. David
Repression of c-myc Transcription by Blimp-1, an Inducer of Terminal B Cell Differentiation, pp. 596-599
Yi Lin; Kwok-kin Wong; Kathryn Calame
Maintenance of Acetylcholine Receptor Number by Neuregulins at the Neuromuscular Junction in Vivo, pp. 599-603
Alfred W. Sandrock Jr.; Stuart E. Dryer; Kenneth M. Rosen; Shai N. Gozani; Rainer Kramer; Lars E. Theill; Gerald D. Fischbach
Identification of α-Fodrin as a Candidate Autoantigen in Primary Sjögren's Syndrome, pp. 604-607
Norio Haneji; Takanori Nakamura; Koji Takio; Kumiko Yanagi; Hiroyuki Higashiyama; Ichiro Saito; Sumihare Noji; Hiromu Sugino; Yoshio Hayashi
Prevention of Mucosal Escherichia coli Infection by FimH-Adhesin-Based Systemic Vaccination, pp. 607-611
Solomon Langermann; Susan Palaszynski; Michelle Barnhart; Gale Auguste; Jerome S. Pinkner; Jeanne Burlein; Philip Barren; Scott Koenig; Simon Leath; C. Hal Jones; Scott J. Hultgren
Partitioning of Large and Minichromosomes in Trypanosoma brucei, pp. 611-614
Klaus Ersfeld; Keith Gull
Continuous In vitro Evolution of Catalytic Function, pp. 614-617
Martin C. Wright; Gerald F. Joyce


AAAS News and Notes, p. 618
S. L. Byrand

Back Matter (26 pp.)

Previous Issue: New Series, Vol. 276, No. 5311, Apr. 18, 1997
Next Issue: New Series, Vol. 276, No. 5313, May 2, 1997



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