| | Opinion |  |
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| | Crisis on the playing-fields 471
British secondary schools in the public sector are in a mess again. So they are elsewhere. But, in Britain, the chances of a cure are only poor.
doi:10.1038/320471a0
PDF (275K)
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| | Oil keeps falling 472
We should worry about some of the casualties of cheaper oil.
doi:10.1038/320472a0
PDF (145K)
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| | Visas back in favour 472
It is good news that the US and Soviet academies are to exchange people again.
doi:10.1038/320472b0
PDF (145K)
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| | News | |
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| | Genetic engineering: USDA goes too public too quickly 473
Tim Beardsley
doi:10.1038/320473a0
PDF (126K)
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| | SDI: Senators' scepticism fortified 473
Tim Beardsley
doi:10.1038/320473b0
PDF (126K)
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| | French science: New government decides slowly 474
Robert Walgate
doi:10.1038/320474a0
PDF (130K)
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| | Argonne National Laboratory: US keeps fast reactors alive 474
Joseph Palca
doi:10.1038/320474b0
PDF (130K)
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| | US − Soviet pact: Cooperation agreement signed 475
Tim Beardsley
doi:10.1038/320475a0
PDF (134K)
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| | An ombudsman for laboratory animals? 475
Charles Wenz
doi:10.1038/320475b0
PDF (134K)
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| | Marine uranium: Japan plumbs the depths 475
Alun Anderson
doi:10.1038/320475c0
PDF (134K)
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| | Dioxin exposure: CDC study still at square one 476
Joseph Palca
doi:10.1038/320476a0
PDF (132K)
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| | Hewlett thanks Stanford University 476
Karen Wright
doi:10.1038/320476b0
PDF (132K)
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| | Spanish science: New law in effect at last 477
doi:10.1038/320477a0
PDF (136K)
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| | China: Educational reforms ahead 477
Vera Rich
doi:10.1038/320477b0
PDF (136K)
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| | UK research: MRC units close 478
Peter Newmark
doi:10.1038/320478a0
PDF (135K)
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| | It's raining pesticides in Hokkaido 478
Alun Anderson
doi:10.1038/320478b0
PDF (135K)
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| | US radioastronomy: Telescope bites cosmic dust 478
Joseph Palca
doi:10.1038/320478c0
PDF (135K)
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| | US education: Science planners ask for more 479
Tim Beardsley
doi:10.1038/320479a0
PDF (139K)
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| | Soviet rivers: Conflict of interest in academy 479
Vera Rich
doi:10.1038/320479b0
PDF (139K)
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| | Correspondence | |
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| | New idea on South Africa 480
JUDITH MASTERS, NEIL CAITHNESS & RICHARD RAYNER
doi:10.1038/320480a0
PDF (133K)
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| | The role of advocacy 480
LEO UZYCH
doi:10.1038/320480b0
PDF (133K)
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| | More on Sakharov 480
ERAST B. GLINER
doi:10.1038/320480c0
References | PDF (133K)
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| | Comet RNA shock 480
JOHN H. ROGERS
doi:10.1038/320480d0
PDF (133K)
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| | Correction 480
doi:10.1038/320480e0
PDF (133K)
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| | News and Views |  |
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| | Can chance be less than zero? 481
An intriguing review of physical problems yielding negative probabilities may fail to demonstrate their reality, but should not be overlooked on that account.
John Maddox
doi:10.1038/320481a0
PDF (138K)
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| | Vertebrate phylogeny: Are fruit bats primates? 482
R.D. Martin
doi:10.1038/320482a0
References | PDF (256K)
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| | Nitrogen fixation: Gaseous diffusion in cyanobacterial heterocysts 483
Frank Minchin
doi:10.1038/320483a0
PDF (282K)
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| | Cell biology: Finding the missing links 484
Julian Heath
doi:10.1038/320484a0
References | PDF (263K)
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| | Evolution of antibodies: The road not taken 485
Walter Gilbert
doi:10.1038/320485a0
PDF (256K)
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| | 100 years ago 486
The Sunrise Shadow of Adam's Peak, Ceylon
doi:10.1038/320486a0
PDF (141K)
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| | DNA structure: Bent molecules—how and why? 487
David Lilley
doi:10.1038/320487a0
References | PDF (264K)
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| | Ethnic differences: Variation in human testis Size 488
Jared M. Diamond
doi:10.1038/320488a0
References | PDF (256K)
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| | Astrophysics: Galaxy distances and deviations from universal expansion 489
J. Richard Bond & Sidney van den Bergh
doi:10.1038/320489a0
References | PDF (272K)
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| | Scientific Correspondence | |
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| | Confederations and human ecology 491
Bruce Denness
doi:10.1038/320491a0
References | PDF (137K)
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| | The mesoscale effects of nuclear winter 491
Stephen H. Schneider, Starley L. Thompson & Curt Covey
doi:10.1038/320491b0
References | PDF (276K)
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| | Evolution with a Japanese slant 492
ATUHIRO SIBATANI
doi:10.1038/320492a0
References | PDF (142K)
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| | Book Reviews |  |
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| | A word to the wise 493
Philip T. Smith reviews Knowledge of Language: Its Nature, Origin, and Use.
By
Noam Chomsky
doi:10.1038/320493a0
PDF (244K)
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| | [Book Reviews 'picture story'] 493
doi:10.1038/320493b0
PDF (120K)
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| | On the paper chase 494
John Galloway reviews Elements of the Scientific Paper: A Step-by-Step Guide for Students and Professionals.
By
Michael J. Katz
doi:10.1038/320494a0
PDF (124K)
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| | Textbook reprise—animal behaviour 495
Richard Cowie reviews Unravelling Animal Behaviour.
By
Marian Stamp Dawkins and Animal Behaviour: Psychobiology, Ethology and Evolution
By
David McFarland and An Introduction to Ethology.
By
P. J. B. Slater and Animal Behaviour: A Concise Introduction
By
Mark Ridley
doi:10.1038/320495a0
PDF (159K)
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| | The hard and lonely road to science 496
Brenda Maddox reviews Hypatia's Heritage: A History of Women in Science from Antiquity to the Late Nineteenth Century.
By
Margaret Alic
doi:10.1038/320496a0
PDF (135K)
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| | Myth in the making 496
Derek Paddon reviews The Fifth Generation Computer: The Japanese Challenge.
By
Tohru Moto-oka, Masaru Kitsuregawa & F.D.R. Apps
doi:10.1038/320496b0
PDF (137K)
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| | Commentary | |
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| | Building damage in Mexico City earthquake 497
One lesson to be learned from the recent Mexico City earthquake is that the Mexican earthquake-code torsional design recommendations for asymmetric buildings do not include a sufficient safety margin.
Adrian M. Chandler
doi:10.1038/320497a0
References | PDF (609K)
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| | Article |  |
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| | DNA bending at adenine  thymine tracts 501
Hyeon-Sook Koo, Hen-Ming Wu & Donald M. Crothers
doi:10.1038/320501a0
Abstract & References | PDF (649K)
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| | Letters | |
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| | Large-scale anisotropy in the Hubble flow 506
C. A. Collins, R. D. Joseph & N. A. Robertson
doi:10.1038/320506a0
First paragraph & References | PDF (340K)
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| | Solar radio signatures suggestive of proton beams 508
A. O. Benz & G. M. Simnett
doi:10.1038/320508a0
First paragraph & References | PDF (250K)
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| | Radio method of mapping large-scale coronal magnetic fields on active stars 509
R. T. Stewart
doi:10.1038/320509a0
First paragraph & References | PDF (248K)
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| | Chaotic rotation of Hyperion? 511
Richard P. Binzel, Jacklyn R. Green & Chet B. Opal
doi:10.1038/320511a0
First paragraph & References | PDF (110K)
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| | Experimental observation of ultra-low-frequency waves generated in the ionosphere 511
S. Ganguly
doi:10.1038/320511b0
First paragraph & References | PDF (297K)
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| | Vertical distribution of dimethylsulphide in the marine atmosphere 514
R. J. Ferek, R. B. Chatfield & M. O. Andreae
doi:10.1038/320514a0
First paragraph & References | PDF (344K)
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| | Formation of damage pits by cavitation in a polymer solution 516
Hiroshi Nanjo, Akira Shima & Tomoji Tsujino
doi:10.1038/320516a0
First paragraph & References | PDF (276K)
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| | Precious metals in ferromanganese crusts from the south-west Pacific 518
B. R. Bolton, J. Ostwald & M. Monzier
doi:10.1038/320518a0
First paragraph & References | PDF (350K)
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| | Contribution of metabolic carbon to mollusc and barnacle shell carbonate 520
Noriyuki Tanaka, Marc C. Monaghan & Danny M. Rye
doi:10.1038/320520a0
First paragraph & References | PDF (415K)
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| | Long-range colour-generating interactions across the retina 523
Ernst Pöppel
doi:10.1038/320523a0
First paragraph & References | PDF (431K)
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| | Colour-contingent after-effects are really wavelength-contingent 525
Peter Thompson & Gary Latchford
doi:10.1038/320525a0
First paragraph & References | PDF (235K)
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| | Traction proteins in the extracellular matrix of Dictyostelium discoideum slugs 526
Phil H. Vardy, Leonard R. Fisher, Elizabeth Smith & Keith L. Williams
doi:10.1038/320526a0
First paragraph & References | PDF (522K)
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| | Postsynaptic hyperpolarization during conditioning reversibly blocks induction of long-term potentiation 529
Roberto Malinow & John P. Miller
doi:10.1038/320529a0
First paragraph & References | PDF (231K)
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| | Interaction of plasma membrane fibronectin receptor with talin—a transmembrane linkage 531
Alan Horwitz, Kimberly Duggan, Clayton Buck, Mary C. Beckerle & Keith Burridge
doi:10.1038/320531a0
First paragraph & References | PDF (405K)
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| | Envelope structure of Semliki Forest virus reconstructed from cryo-electron micrographs 533
R. H. Vogel, S. W. Provencher, C.-H. von Bonsdorff, M. Adrian & J. Dubochet
doi:10.1038/320533a0
First paragraph & References | PDF (507K)
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| | Expression of the HTLV-III envelope gene by a recombinant vaccinia virus 535
Sekhar Chakrabarti, Marjorie Robert-Guroff, Flossie Wong-Staal, Robert C. Gallo & Bernard Moss
doi:10.1038/320535a0
First paragraph & References | PDF (410K)
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| | Expression of AIDS virus envelope gene in recombinant vaccinia viruses 537
Shiu-Lok Hu, Steve G. Kosowski & Joel M. Dalrymple
doi:10.1038/320537a0
First paragraph & References | PDF (486K)
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| | Requirement for c-ras proteins during viral oncogene transformation 540
Mark R. Smith, Steven J. DeGudicibus & Dennis W. Stacey
doi:10.1038/320540a0
First paragraph & References | PDF (585K)
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| | Viral particles induce Ia antigen expression on astrocytes 543
P. T. Massa, R. Dörries & V. ter Meulen
doi:10.1038/320543a0
References | PDF (549K)
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| | Major reorganization of immunoglobulin V
H segmental elements during vertebrate evolution 546
K. R. Hinds & G. W. Litman
doi:10.1038/320546a0
First paragraph & References | PDF (568K)
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| | A chromosome 14 inversion in a T-cell lymphoma is caused by site-specific recombination between immunoglobulin and T-cell receptor loci 549
Christopher T. Denny, Yasunobu Yoshikai, Tak W. Mak, Stephen D. Smith, Gregory F. Hollis & Ilan R. Kirsch
doi:10.1038/320549a0
First paragraph & References | PDF (379K)
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| | Structure of an adeninecytosine base pair in DNA and its implications for mismatch repair 552
William N. Hunter, Tom Brown, Naveen N. Anand & Olga Kennard
doi:10.1038/320552a0
First paragraph & References | PDF (457K)
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| | Crystallographic analysis of mutant human haemoglobins made in Escherichia coli
555
Bonaventura F. Luisi & Kiyoshi Nagai
doi:10.1038/320555a0
First paragraph & References | PDF (343K)
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| | Product Reviews | |
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| | Strong signals from streptavidin−biotin 557
The robust attraction between a bacterial protein and vitamin H could boost the sensitivity of immuno assays, improve DNA probes and aid in protein purifications. Its role in nature remains a mystery.
R. M. Buckland
doi:10.1038/320557a0
References | PDF (282K)
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| | The latest in Saint Louis 558
With over 600 exhibits and nearly 6,000 paper presentations, this year's FASEB meeting may exhaust even the most energetic of visitors.
doi:10.1038/320558a0
PDF (480K)
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