Articles

 Faculty Organization

Steven Jonas
Science 20 April 1973: 255.
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 Medium for Hybrid Selection

John W. Littlefield
Science 20 April 1973: 255.
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 Brazilian Higher Education

Frank M. Tiller
Science 20 April 1973: 255.
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 PCB Diet

Edwin J. Andrews, David Jowett, J. R. Allen, and D. H. Norback
Science 20 April 1973: 255-257.
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 Reaction to Rhetoric

F. P. Bornstein
Science 20 April 1973: 257.
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 Snapping Turtle Plea

G. T. Nurse, Thomas H. Jukes, and Richard Holmquist
Science 20 April 1973: 257.
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 Additional Sources of Financial and Political Support for Science

Philip H. Abelson
Science 20 April 1973: 259.
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Megagauss Physics

C. M. Fowler
Science 20 April 1973: 261-267.
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 Invertebrate Color Vision and the Tuned-Receptor Paradigm

Gerald S. Wasserman
Science 20 April 1973: 268-275.
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 Where We Are Now

Steven Weinberg
Science 20 April 1973: 276-278.
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 Training Grants (I): There Is Hope Some May Be Salvaged

Barbara J. Culliton
Science 20 April 1973: 279-280.
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 Navy R & D: Will Congress Have the Nerve to Spear Trident?

Luther J. Carter
Science 20 April 1973: 281-284.
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 Mental Health: NIMH Reeling over Proposed Budget Cuts

Constance Holden
Science 20 April 1973: 284-285.
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 Herbicides: AAAS Study Finds Dioxin in Vietnamese Fish

Deborah Shapley
Science 20 April 1973: 285-286.
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 Optical Data Storage: Mass Memories for Future Computers?

Allen L. Hammond
Science 20 April 1973: 287-289.
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 Book Reviews

Science 20 April 1973: 290-293.
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Comet Encke: Meteor Metallic Ion Identification by Mass Spectrometer

R. A. Goldberg and A. C. Aikin
Science 20 April 1973: 294-296.
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Lignification in Trees: Indication of Exclusive Peroxidase Participation

John M. Harkin and John R. Obst
Science 20 April 1973: 296-298.
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High-Pressure Polymorph of Thulium: An X-ray Diffraction Study

Lin-Gun Liu, William A. Bassett, and Maria S. Liu
Science 20 April 1973: 298-299.
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Intracellular Plutonium: Removal by Liposome-Encapsulated Chelating Agent

Yueh-Erh Rahman, Marcia W. Rosenthal, and Elizabeth A. Cerny
Science 20 April 1973: 300-302.
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Hyaluronate Inhibition of Chondrogenesis: Antagonism of Thyroxine, Growth Hormone, and Calcitonin

Bryan P. Toole
Science 20 April 1973: 302-303.
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Blood Cells Preserved in a Mummy 2000 Years Old

Michael R. Zimmerman
Science 20 April 1973: 303-304.
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Cyclic AMP Phosphodiesterase in Cloned Astrocytoma Cells: Norepinephrine Induces a Specific Enzyme Form

Petko Uzunov, Harvey M. Shein, and Benjamin Weiss
Science 20 April 1973: 304-306.
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26-Hydroxyecdysone: New Insect Molting Hormone from the Egg of the Tobacco Hornworm

J. N. Kaplanis, W. E. Robbins, M. J. Thompson, and S. R. Dutky
Science 20 April 1973: 307-308.
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Octopamine-Sensitive Adenylate Cyclase: Evidence for a Biological Role of Octopamine in Nervous Tissue

James A. Nathanson and Paul Greengard
Science 20 April 1973: 308-310.
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Activation of Hemoglobin C Synthesis in Sheep Marrow Culture

John W. Adamson and George Stamatoyannopoulos
Science 20 April 1973: 310-312.
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Somatomedin: Inhibition of Adenylate Cyclase Activity in Subcellular Membranes of Various Tissues

Guy P. E. Tell, Pedro Cuatrecasas, Judson J. Van Wyk, and Raymond L. Hintz
Science 20 April 1973: 312-315.
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Acetylcholine: Fast Axoplasmic Transport in Insect Chemoreceptor Fibers

Rollie Schafer
Science 20 April 1973: 315-317.
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Learning: Classical and Avoidance Conditioning in the Mollusk Pleurobranchaea

George J. Mpitsos and William J. Davis
Science 20 April 1973: 317-320.
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Selective Visual Experience Fails to Modify Receptive Field Properties of Rabbit Striate Cortex Neurons

R. Ranney Mize and E. H. Murphy
Science 20 April 1973: 320-323.
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 Preserve Guatemalan Teosinte, a Relict Link in Corn's Evolution

Walton C. Galinat
Science 20 April 1973: 323.
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 Nonnuclear Energy for Development

J. Frederick Weinhold
Science 20 April 1973: 324.
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 Transfer of Technology and National Economic Development

Jordan Baruch
Science 20 April 1973: 324-325.
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 Aerial Inventory of National Resources

Joseph Burns
Science 20 April 1973: 325.
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 Registration and Travel Information—Mexico City

Science 20 April 1973: 326-327.
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