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Science, New Series, Vol. 111, No. 2875, Feb. 3, 1950


Previous Issue: New Series, Vol. 111, No. 2874, Jan. 27, 1950
Next Issue: New Series, Vol. 111, No. 2876, Feb. 10, 1950


Health Hazards in Radiation Work, pp. 103-109
M. Ingram

The Mechanism of the Heat Inactivation of Pepsin, pp. 110-111
E. J. Casey; K. J. Laidler


Technical Papers
Absorption of Radioactive Zirconium and Niobium by Plant Roots from Soils and Its Theoretical Significance, pp. 112-113
J. Vlamis; G. A. Pearson
New Method for Studying Electrical Orientation and Relaxation Effects in Aqueous Colloids: Preliminary Results with Tobacco Mosaic Virus, pp. 113-116
Chester T. O'Konski; Bruno H. Zimm
The Induction of Resistance to 4-Amino-N10-Methyl-Pteroylglutamic Acid in a Strain of Transmitted Mouse Leukemia, pp. 116-117
J. H. Burchenal; E. Robinson; S. F. Johnston; M. N. Kushida
Hemin Synthesis in Spleen Homogenates, pp. 117-118
Kurt I. Altman; Kurt Salomon
Effect of 2,4-Dichlorophenoxyacetic Acid on the Alpha and Beta Amylase Activity in the Stems and Leaves of Red Kidney Bean Plants, p. 118
W. B. Neely; C. D. Ball; C. L. Hamner; H. M. Sell


News and Notes, pp. 119-122

Previous Issue: New Series, Vol. 111, No. 2874, Jan. 27, 1950
Next Issue: New Series, Vol. 111, No. 2876, Feb. 10, 1950



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