NSF Appoints Two Assistant Directors     

W J 《Science (New York, N.Y.)》1988,240(4855):980

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The Natural History of Nautilus. Peter Douglas Ward. Allen and Unwin, Winchester, MA, 1987. xiv, 267 pp., illus. $34.95; Nautilus. The Biology and Paleobiology of a Living Fossil. W. Bruce Saunders and Neil H. Landman, Eds. Plenum, New York, 1988. xxviii, 632 pp., illus., + plates. $95. Topics in Geobiology, vol. 6     

Vermeij GJ 《Science (New York, N.Y.)》1988,240(4855):1074-1075

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Gender at Work. The Dynamics of Job Segregation by Sex during World War II. Ruth Milkman. University of Illinois Press, Urbana, IL, 1987. xvi, 213 pp., illus. $32.50; paper, $8.95. The Working Class in American History     

Hirshfield DS 《Science (New York, N.Y.)》1988,240(4855):1064-1065

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Adolescent Mothers in Later Life. Frank F. Furstenberg, Jr., J. Brooks-Gunn, and S. Philip Morgan. Cambridge University Press, New York, 1987. xiv, 204 pp., illus. $27.95. Human Development in Cultural and Historical Contexts     

Mortimer JT 《Science (New York, N.Y.)》1988,240(4855):1060-1061

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Setting Research Goals Not Enough, Says OECD: Policies to encourage more research on topics of economic importance seem to be effective only in countries with relatively strong central control over allocation of resources     

Dickson D 《Science (New York, N.Y.)》1988,241(4868):898

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The Non-Darwinian Revolution. Reinterpreting a Historical Myth. Peter . Bowler. Johns Hopkins University Press, Baltimore, 1988. xii, 238 pp., illus. $27.50     

Hull DL 《Science (New York, N.Y.)》1988,242(4886):1710-1711

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Hopes Recede for Early Ban on Chemical Arms: Although the United States and the Soviet Union have narrowed many of their differences, key issues remain unresolved and momentum has been lost     

Dickson D 《Science (New York, N.Y.)》1988,240(4848):22-23

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For whom the bell tolls     

Koshland DE 《Science (New York, N.Y.)》1988,241(4872):1405

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Rapid growth of magnesium-carbonate weathering products in a stony meteorite from antarctica     

Jull AJ  Cheng S  Gooding JL  Velbel MA 《Science (New York, N.Y.)》1988,242(4877):417-419

Nesquehonite, a hydrous magnesium carbonate, occurs as a weathering product on the surface of the Antarctic meteorite LEW 85320(H5 chondrite). Antarctic meteorites have resided on the earth for periods of 10(4) to 10(6) years, but the time needed for weathering products to form has been uncertain. Isotopic measurements of delta(13)C and delta(18)O indicate that the nesquehonite formed at near freezing temperatures by reaction of meteoritic minerals with terrestrial water and carbon dioxide. Results from carbon-14 dating suggest that, although the meteorite has been in Antarctica for at least 3.2 x 10(4) to 3.3 x 10(4) years, the nesquehonite formed after A.D.1950.  相似文献   

Famine Early Warning System Wins Its Spurs: Monitoring program that spotted new crisis in Ethiopia sheds temporary status, but more is being asked of it     

Walsh J 《Science (New York, N.Y.)》1988,239(4837):249-250

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