MICROBIOLOGY

L. P. Pshenin. On the accumulation of U–UX\(_1\) by nitrogen-fixing microorganisms of the Black Sea ..... 1448

BIOPHYSICS

L. A. Bliumenfel’d, V. A. Benderskii. Magnetic and dielectric properties of highly ordered macromolecular structures ..... 1451

N. I. Shmeleva. Variations in the peripheral blood and marrow of rats at a late stage following a single exposure to X-rays ..... 1455

BIOCHEMISTRY

A. A. Gurevich, N. A. Golosova. The effect of aeration on the reduction of methemoglobin with ascorbic acid ..... 1458

P. A. Kolesnikov. On hydrogen donors and acceptors in redox reactions involving riboflavin ..... 1462

BOTANY

I. A. Borzova. On the origin of a six-furrowed type of pollen in Labiatae ..... 1465

PLANT ECOLOGY

I. V. Karmanova. Competition for nutrient substances and seed-reproduction in herbaceous associations of the taiga zone ..... 1468

PLANT PHYSIOLOGY

A. A. Shlyk, V. L. Kaler, G. M. Podchufarova. Protochlorophyllin in illuminated green leaves ..... 1472

EVOLUTIONAL MORPHOLOGY

N. S. Lebedkina. The development of the parasphenoid in Urodela ..... 1476

CORRECTIONS

In the article by I. A. Kakovskii and N. G. Tyurin, “The Catalytic Action of Copper Ions in the Dissolution of Metals with Oxygen Depolarization,” published in DAN, vol. 130, no. 4, 1960, on p. 813, in the caption to Fig. 1, instead of the printed: 3 — Cu\(^{++}\) 0.11 g-ion/l, it should read: 3 — Cu\(^{++}\) 0.01 g-ion/l.

On p. 814, in Fig. 3, under the abscissa axis, instead of “Concentration NH\(_3\)” it should read “Copper concentration, \(10^{-2}\) g-ion/l.”

In the article by I. A. Kakovskii and A. N. Grebnev, “On a Peculiarity Observed in the Process of Suppression of Minerals,” published in DAN, vol. 131, no. 2, 1960, on p. 372, in the caption to Fig. 2, instead of the printed: \(a\) — 0.1 mol/t, \(b\) — 0.5 mol/t, it should read: \(a\) — 0.5 mol/t, \(b\) — 0.1 mol/t.

T-10540. Signed for printing 15 VIII 1960. Print run 5135 copies. Order 713
Paper format 70 × 108\(^{1/16}\). Paper sheets 7\(^{1/4}\). Printed sheets 19.86 + 5 inserts. Accounting-publishing sheets 21.6

2nd Printing House of the Publishing House of the Academy of Sciences of the USSR, Moscow, Shubinskii Lane, 10