Acta Biologica 46. (1995)

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CONTENTS János Szentágothai (1912—1994). G. Székely ........................................................................................... 3 Metal sensitivity of some symbiotic N2-fixing bacteria and Pseudomonas strains. Borbála Bíró, H. E. A. F. Bayoumi, 5. Balázsy, M. Kecskés ................................................................... 9 Some environmental factors influencing the survival of Rhizobium leguminosarum bv. viceae■ H. E. A. F. Bayoumi. Borbála Bíró, M. Kecskés ........................................................... 17 The effect of dimethyl sulphoxide on CCl^-induced damage to the liver and its effects on hepatic glutathione and glucose. A. C. Achudume, U. A. Aondo ............................................ 31 Effects of an organophosphate on the antioxidant systems of fish tissues. Do Quy Hai, Ilona Sz. Varga, B. Matkovics ............................................................................................................ 39 High efficiency callus induction and plant regeneration in petiole culture of four poplar genotypes. M. Ali Safari. 3. Kiss, 3. Gergácz, L. E. Heszky .............................................. 51 Role of cholinergic receptors in melanophore responses of amphibians. A. S. Ali, J. Pe­ter, S. A. Ali ........................................................................................................................................... 61 Effects of 6-hydroxydopamine on testosterone production by mouse Leydig cells in vitro. E. Wango, H. 0. Odonqo, 3. Oduma, D. Oduor-Okelo ............................................................... 75 Ultrastructural variations of the rat fetal adrenal cortex after maternal bilateral adre­nalectomy and exogen glucocorticoid administration. Celia Machin, 3, Sierra, Begona Diaz, Carmen Rua ........................................................................................................................... 87 Similar localization of immunoreactive glutamate and aspartate in the pineal organ and retina of various nonmammalian vertebrates. B. Viqh, K. Debreceni, M. 3, Manzano e Silva .............................................................................................................................................................. 99 Testicular morphology and testosterone levels in dogs immunized with antibodies generated against an androgen binding antigen in the epididymal cauda. E. Wango ................... 107 The structure of the dart and dart sac of the snail Eremina ehrenbergl, Roth. 1839. 5. S. El-Sherief. F. M. Bawab, S, M. Mehanny ............................................................................. 119 BOOK REVIEWS ............................................................................................................................................................ 131 MAGYAR TUDOMÁNYOS AKADÉMIA KÖNYVTÁRA

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