1. Desacetyl-rifamycins: Preparation and antibacterial properties

   • N. Maggi
   • A. Vigevani
   • R. Pallanza

   Specialia Pages: 209 - 211

2. Molecular properties of pepsin as studied by gel filtration

   • G. Porcelli

   Specialia Pages: 211 - 213

3. Metabolism of alcohol in partially hepatectomized rats exposed to cold

   • N. Platonow
   • B. B. Coldwell

   Specialia Pages: 213 - 214

4. Effects of fluorinated dinitrobenzenes on erythrocyte membrane acetylcholinesterase

   • F. Herz
   • E. Kaplan
   • E. J. Gleiman

   Specialia Pages: 215 - 216

5. Zur Resistenz der GramineeImperata cylindrica L. gegenüber dem herbiziden Wirkstoff Simazin

   • J. Hurter
   • J. Berüter
   • H. P. Bosshardt

   Specialia Pages: 217 - 217

6. Pigments occurring inHydrachna geografica andPiona nodata (hydracarina, arachnoidea)

   • B. Czeczuga
   • R. Czerpak

   Specialia Pages: 218 - 219

7. Peroxidative activity of hemepeptides from horse heart cytochromec

   • A. T. Tu
   • J. A. Reinosa
   • Y. Y. Hsiao

   Specialia Pages: 219 - 221

8. Une note concernant la centrifugation fractionnée de foie de rat

   • P. Tulkens
   • R. Wattiaux

   Specialia Pages: 222 - 223

9. The effect of UV-irradiation on glucobrassicin and other glucosinolates (mustard oil glucosides)

   • N. Michajlovskij

   Specialia Pages: 223 - 224

10. Pigment formation from tyrosine derivatives by UV-irradiation in thin-layer chromatography

    • A. Ber
    • Lina Wasserman

    Specialia Pages: 224 - 225

11. Inhibition of steroidΔ ⁴ reductase by heparin: Studies with desoxycorticosterone, progesterone, androstenedione and testosterone

    • Patricia T. Krzanowski
    • R. C. Troop

    Specialia Pages: 225 - 226

12. Cation inhibition of DNA synthesis in mammary epithelial cells in vitro

    • R. W. Turkington

    Specialia Pages: 226 - 228

13. The specificity of histones in nucleated erythrocytes

    • L. J. Edwards
    • L. S. Hnilica

    Specialia Pages: 228 - 229

14. Influence of a mixture of chemical protectors on the lymphopoietic and hematopoietic system of mice irradiated with a dose of 2000 R of X-Rays

    • J. R. Maisin

    Specialia Pages: 230 - 231

15. Increase in urocanate concentration in human epidermis following insolation

    • I. M. Hais
    • A. Štrych

    Specialia Pages: 231 - 232

16. Temperaturabhängigkeit der elektrischen Leitfähigkeit einiger Tocopherole

    • W. Boguth
    • G. Herrmann
    • H. Niemann

    Specialia Pages: 232 - 233

17. Die absteigenden Verbindungen der Sehrinde des HalbaffenGalago crassicaudatus

    • J. A. Campos-Ortega
    • M. Blank
    • P. Glees

    Specialia Pages: 234 - 235

18. Effect of nicotine on the transmembrane potential and contractility of isolated rat atria

    • S. Shibata
    • P. H. Hollander
    • J. L. Webb

    Specialia Pages: 236 - 237

19. Influence of prenatal X-radiation on brain lipid and cerebroside content in developing rats

    • Antonia Vernadakis
    • Regina Casper
    • Paola S. Timiras

    Specialia Pages: 237 - 238

20. Preliminary studies on titrable acidity in xerophytic plants:Salvadora persica Linn. andProsopis juliflora D.C.

    • Y. D. Gaur

    Specialia Pages: 239 - 240

21. Recovery cycles of primary evoked potentials in cat sensorimotor cortex

    • T. Allison

    Specialia Pages: 240 - 241

22. Influence of diazoxide on regional blood flow in rats

    • J. Kapitola
    • O. Küchel
    • I. Jahoda

    Specialia Pages: 242 - 243

23. The effect of adrenaline on different states of sleep

    • M. M. Rakić
    • M. Radulovački
    • D. B. Beleslin

    Specialia Pages: 243 - 244

24. 2,4-dinitrophenol inhibition of P³² release from human red cells

    • A. Omachi
    • C. B. Scott
    • B. E. Glader

    Specialia Pages: 244 - 245

25. Superior cervical ganglionectomy in the Japanese quail

    • L. Z. McFarland
    • K. Homma
    • W. O. Wilson

    Specialia Pages: 245 - 247

26. The mechanical response of isolated arteries to potassium

    • P. Konold
    • G. Gebert
    • K. Brecht

    Specialia Pages: 247 - 248

27. Uptake of³⁵S-Sulphate in dimethylbenzanthracene painted mouse skin

    • M. B. Ketkar

    Specialia Pages: 248 - 249

28. Influence of antifibrinolytic substances on allergic reactions. Experiments with ε-aminocaproic acid and amino-methyl-cyclohexane-carbonic acid

    • W. Raab

    Specialia Pages: 250 - 250

29. p-Xylylenedicyanide and related compounds, weakly cytotoxic nitriles

    • J. A. Nicholson
    • C. H. Jarboe
    • F. W. McLafferty

    Specialia Pages: 251 - 252

30. A negative inotropic response of cat atria to sympathetic nerve stimulation or norepinephrine

    • F. H. Schneider
    • R. Cysyk
    • C. N. Gillis

    Specialia Pages: 252 - 254

31. The influence of bee venom on the osmotic fragility of human red blood cells

    • I. Hort
    • A. Herz

    Specialia Pages: 254 - 255

32. Experimental arthritis in the rabbit induced by group a streptococcal products

    • I. Ginsburg
    • Z. Silberstein
    • J. H. Boss

    Specialia Pages: 256 - 257

33. Effect of alloxan diabetes and insulin administration on the incidence of pituitary necrosis caused by hexadimethrine bromide in rats

    • K. Kovács
    • I. Szijj

    Specialia Pages: 257 - 258

34. La Rigenerazione del testicolo atrofico da Fluoroacetamide

    • L. Mazzanti
    • M. Lopez
    • M. Del Tacca

    Specialia Pages: 258 - 259

35. A note on the contribution of hepatopancreas to the development of oocytes in the scorpion (Palamnaeus bengalensis)

    • N. K. Mishra

    Specialia Pages: 260 - 260

36. Kristalloide Strukturen im Zytoplasma von lymphatischen Zellen verschiedener Affen

    • D. W. Büttner

    Specialia Pages: 261 - 262

37. Ascending projections from the red nucleus in the decerebellate cat

    • D. Bowsher
    • P. Angaut

    Specialia Pages: 262 - 263

38. Le rôle du nœud de Hensen dans la différenciation des somites chez les Oiseaux

    • G. Nicolet

    Specialia Pages: 263 - 264

39. Die Phagozytose von Melaningranula durch Bindegewebszellen während des Gewebeabbaus der Metamorphose beiXenopus

    • G. Glombek

    Specialia Pages: 265 - 265

40. Neuronal and extraneuronal localization of noradrenaline in the rat heart after perfusion at high concentration

    • B. Ehinger
    • B. Sporrong

    Specialia Pages: 265 - 266

41. Modification of an endotoxin effect by esters

    • S. Margherita
    • R. A. Patnode

    Specialia Pages: 267 - 268

42. Two different iodinating systems in isolated thyroid cells

    • F. Rodesch
    • A. Jortay
    • J. E. Dumont

    Specialia Pages: 268 - 269

43. A ‘Short’ feedback mechanism controlling FSH secretion

    • F. Fraschini
    • M. Motta
    • L. Martini

    Specialia Pages: 270 - 271

44. Chromosome aberrations induced by daunomycin in human leucocyte cultures, with the apparent synergistic effect of arginine

    • B. K. Vig
    • Stella B. Kontras
    • L. D. Samuels

    Specialia Pages: 271 - 273

45. Chromosomes in four species of rodents of the genusCtenomys (Rodentia, Octodontidae) from Argentina

    • O. A. Reig
    • P. Kiblisky

    Specialia Pages: 274 - 276

46. MammalianX-chromosomes: A new kind of composite-typeX in the voleArvicola scherman exitus miller

    • W. Schmid
    • M. F. Leppert

    Specialia Pages: 277 - 279

47. Studies onr _II region of T₂-phage

    • N. R. Gandhi
    • R. J. Mehta
    • V. V. Modi

    Specialia Pages: 279 - 280

48. Initial cytotaxonomic data on certain families of amphibiousAnura (Diplasiocoela, afterNoble)

    • A. Morescalchi

    Specialia Pages: 280 - 283

49. Phototactic choice between two white light sources of various intensity in blowfly,Calliphora erythrocephala Meig.

    • Barbara Lipińska-Skawińska
    • J. A. Chmurzyński

    Specialia Pages: 283 - 284

50. Analyse des akustischen Geschlechtererkennungsmechanismus (Befreiungsrufe) bei Kröten (GenusBufo)

    • R. Flindt
    • H. Hemmer

    Specialia Pages: 285 - 286