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Science, New Series, Vol. 268, No. 5212, May 12, 1995


Previous Issue: New Series, Vol. 268, No. 5211, May 5, 1995
Next Issue: New Series, Vol. 268, No. 5213, May 19, 1995


Front Matter (35 pp.)
Editorial: Degrees of Uncertainty, p. 783
Floyd E. Bloom


Letters
Impetus for NSF Policy, p. 785
Donald N. Langenberg
Who Survived the Cretaceous?, p. 785
Daniel H. Janzen
Authorship Criteria, pp. 785-786
Jerome P. Kassirer
EPA and Biotechnology Regulation, p. 786
Lynn R. Goldman
Reading Disability, Attention-Deficit Hyperactivity Disorder, and the Immune System, pp. 786-788
Reed P. Warren; J. Dennis Odell; W. Louise Warren; Roger A. Burger; Alma Maciulis; Wayne W. Daniels; Anthony R. Torres; Lon R. Cordon; Shelley D. Smith; David W. Fulker; William J. Kimberling; Bruce F. Pennington; John C. DeFries
Amorphous Stability and Trehalose, p. 788
Camilo Colaco; Jaap Kampinga; Bruce Roser
Noncoding DNA, Zipf's Law, and Language, p. 789
Andrzej K. Konopka; Colin Martindale


Corrections and Clarifications: Continent-Ocean Chemical Heterogeneity in the Mantle Based on Seismic Tomography, p. 789
ScienceScope, p. 791
Richard Stone


News and Comment
Dispute Splits Schizophrenia Study, pp. 792-794
Eliot Marshall
O'Leary Takes Swipe at Bureaucracy, p. 794
Andrew Lawler
U.K. Tries to Set Priorities with the Benefit of Foresight, pp. 795-796
Nigel Williams
Russian Arctic Battles Pipeline Leak, pp. 796-797
Richard Stone
Chiba's Heavy-Ion Accelerator Battles Cancer and Critics, pp. 797-798
Dennis Normile


Research News
New Clue to Prostate Cancer Spread, pp. 799-800
Jean Marx
Battle is Joined Over Gamma Bursts, pp. 800-801
Tim Appenzeller
Study Unveils Climate Cooling Caused by Pollutant Haze, p. 802
Richard A. Kerr
Researchers Get a Sharper Image of the Human Brain, pp. 803-804
Marcia Barinaga
Keeping the Kilo From Gaining Weight, p. 804
Sally Croft
Umbilical Cords: Turning Garbage Into Clinical Gold, pp. 805-806
Clare Thompson
New Compounds Make Light of Pests, p. 806
Robert F. Service


Random Samples, pp. 807+809
Constance Holden


Policy Forum
The World's Forests: Need For a Policy Appraisal, pp. 823-824
Norman Myers


Perspectives
Neuropeptides, Adenylyl Cyclase, and Memory Storage, pp. 825-826
Eric Kandel; Ted Abel
A Fixation with Fixation, pp. 827-828
G. J. Leigh


From Microwave Anisotropies to Cosmology, pp. 829-835
Douglas Scott; Joseph Silk; Martin White


Research Article
Conversion of Xenopus Ectoderm into Neurons by NeuroD, a Basic Helix-Loop- Helix Protein, pp. 836-844
Jacqueline E. Lee; Stanley M. Hollenberg; Lauren Snider; David L. Turner; Naomi Lipnick; Harold Weintraub


Reports
Aligned Carbon Nanotube Films: Production and Optical and Electronic Properties, pp. 845-847
Walt A. de Heer; W. S. Bacsa; A. Châtelain; T. Gerfin; R. Humphrey-Baker; L. Forro; D. Ugarte
Phonons Localized at Step Edges: A Route to Understanding Forces at Extended Surface Defects, pp. 847-850
L. Niu; D. J. Gaspar; S. J. Sibener
Seismic Evidence for an Earthquake Nucleation Phase, pp. 851-855
W. L. Ellsworth; G. C. Beroza
Late Triassic Turtles from South America, pp. 855-858
Guillermo W. Rougier; Marcelo S. de la Fuente; Andrea B. Arcucci
Serpentine Stability to Mantle Depths and Subduction-Related Magmatism, pp. 858-861
Peter Ulmer; Volkmar Trommsdorff
Dinitrogen Cleavage by a Three-Coordinate Molybdenum (III) Complex, pp. 861-863
Catalina E. Laplaza; Christopher C. Cummins
CD1 Recognition by Mouse NK1+ T Lymphocytes, pp. 863-865
Albert Bendelac; Olivier Lantz; Mary E. Quimby; Jonathan W. Yewdell; Jack R. Bennink; Randy R. Brutkiewicz
Identification and Characterization of a Prostaglandin Transporter, pp. 866-869
Naoaki Kanai; Run Lu; Joseph A. Satriano; Yi Bao; Allan W. Wolkoff; Victor L. Schuster
A Neuropeptide Gene Defined by the Drosophila Memory Mutant amnesiac, pp. 869-873
Mel B. Feany; William G. Quinn
Control of Proton Sensitivity of the NMDA Receptor by RNA Splicing and Polyamines, pp. 873-876
Stephen F. Traynelis; Melissa Hartley; Stephen F. Heinemann
Gene Trap Tagging of PROLIFERA, an Essential MCM2-3-5-Like Gene in Arabidopsis, pp. 877-880
Patricia S. Springer; W. Richard McCombie; Venkatesan Sundaresan; Robert A. Martienssen
Role of the Chaperone Protein Hsp 104 in Propagation of the Yeast Prion- Like Factor [psi+], pp. 880-884
Yury O. Chernoff; Susan L. Lindquist; Bun-ichiro Ono; Sergei G. Inge-Vechtomov; Susan W. Liebman
KAl1, a Metastasis Suppressor Gene for Prostate Cancer on Human Chromosome 11p 11.2, pp. 884-886
Jin-Tang Dong; Pattie W. Lamb; Carrie W. Rinker-Schaeffer; Jasminka Vukanovic; Tomohiko Ichikawa; John T. Isaacs; J. Carl Barrett
Long-Range Motional Restrictions in a Multidomain Zinc-Finger Protein from Anisotropic Tumbling, pp. 886-889
Rafael Brüschweiler; Xiubei Liao; Peter E. Wright
Borders of Multiple Visual Areas in Humans Revealed by Functional Magnetic Resonance Imaging, pp. 889-893
M. I. Sereno; A. M. Dale; J. B. Reppas; K. K. Kwong; J. W. Belliveau; T. J. Brady; B. R. Rosen; R. B. H. Tootell


Technical Comments
Evaluating Turnover in Tropical Forests, pp. 894-895
Douglas Sheil; Oliver Phillips


Book Reviews
On Exactitude, pp. 905-906
The Values of Precision.
M. Norton Wise
Review author[s]: Sven Widmalm
Reprints of Books Previously Reviewed, p. 906
Books Received, pp. 906-908


Back Matter (36 pp.)

Previous Issue: New Series, Vol. 268, No. 5211, May 5, 1995
Next Issue: New Series, Vol. 268, No. 5213, May 19, 1995



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