A Magyar Biológiai Kutatóintézetének Évkönyve 19. (1949-1950)

CONTENTS 1. LIMNOLOGY ’AND ZOOLOGY. Lajos Varga: Gastrotrichen aus dem Balaton-See — — — — Jolán Stiller: Epizoische Peritrichen aus dem Balaton II. — — — — 0. Sebestyén and L. Varga: Collo theca volutata n. sp., a new benthic rotifer from Lake Balaton — __ — —< — —, — Olga Sebestyén: Studies on detritus drifts in Lake Balaton — — — — Woynárovich—Entz: Experiments in the artificial incubation of Lucioperca Sandra Cuv. et Val. eggs — — — — —■ — Béla Entz: Some physical: and Chemical conditions of the water of Lake Balaton, investigated from September, 1948, to April, 1949. (Temperature, transparency, dissolved oxygen,, pH, and organic substances) — Béla Entz: Autumn and winter shoals of fish in the shore zones of Lake Balaton in 1947—49 — — — _ — Nagy Barnabás: Quantitative and qualitative investigation of the Saltatoria on the Tihany peninsula — — —; — — — 2. BOTANY. Lajos J. M. Felföldy and M. Magda Felföldy: Comparative study on the physiology of natural polyploids. 'Í. The influence of various hydrogen ion concentrations upon the growth and productivity of Puc­­c i n eü 1 iia dlls tans 2n = 42 and/ P. limosa 2n = 28 — — 1. ajos J. M. Felföldy: Studies on the shore vegetation of Lake Belső-tó at Tihany 3. MIKROBIOLOGY. János Horváth: Hereditary tumour formation in amicronucieate Kahl i a János Horváth: Date on studies in soil protozoa of the Ciliata group with special regard to adaptation to soil conditions — — — — — 4. BIOCHEMISTRY. János Horváth und András Krámli: Über mikrobiologische Umgestaltung von Ste­rinen. II. Oxydation von Cholesterin durch Proactinomyces roseus János Horváth and András Krámli: Experiments in the preparation of penicillin: from local raw materials —‘ —1 — — — — — M. Gerendás: Experimentelle Bestimmung des Thrombininaktivierungsprozesses M. Gerendás und I. Cscfkó: Gleichgewichtsbedingungen des Thrombininaktivie­­ruragsVermögens des Blutes — —1 —• — — — — M. Gerendás, A. L. Pálos and I. Csefkó: Heparin effect and thrombim inactivation M. Gerendás and I. Cscfkó: Histamine-Heparin antagonism in Vivo and in Vitro I. Csefkó and M. Gerendás: Histamine effect and thrombin inactivation — — Oldal 1 15 39 49 65 69 83 95 123 135 147 151 163 167 169 183 191 199 207

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