Upper Barremian−lower Aptian charophyte biostratigraphy from Arrifes section (Algarve Basin, Southern Portugal): correlation with dinoflagellate cyst biostratigraphy von Pérez-Cano, Jordi, Pereira, Hélder J.R., Mendes, Marcia, Pereira, Zélia, Callapez, Pedro Miguel, Fernandes, Paulo

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Diffusion of inorganic carbon across an unstirred layer: a simplified quantitative approach von Helder, R.J

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mechanism of bicarbonate assimilation by the polar leaves of Potamogeton and Elodea. CO₂ concentrations at the leaf surface von PRINS, H. B. A, SNEL, J. F. H, ZANSTRA, P. E, HELDER, R. J

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isolation of leaf protoplasts from the submerged aquatic angiosperm Potamogeton lucens L von Staal, M, Prins, H.B.A, Harmelen, M. van, Helder, R.J

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quantitative approach to the inorganic carbon system in aqueous media used in biological research: dilute solutions isolated from the atmosphere von Helder, R.J

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Der Stofftransport in der Pflanze / Translocation in Plants von Fischer, Hermann, Helder, R. J, Schumacher, Walter, Willenbrink, Johannes

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Der Stofftransport in der Pflanze / Translocation in Plants von Schumacher, W

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Analysis of the Exudation Process in Tomato Plants von ARISZ, W. H., HELDER, R. J., VAN NIE, R.

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Allgemeine Physiologie der Pflanzenzelle / General Physiology of the Plant Cell von Bahr, Günther F, Bogen, Hans J, Brauner, Leo, Bünning, Erwin, Caspersson, T, Collander, Runar, Currier, H. B, Drawert, Horst, Duspiva, Franz, Eberhardt, Frank, Epstein, Emanuel, Fischer, Hermann, Helder, R. J, Kern, Heinz, Klein, Georg, Kramer, Paul J, Levitt, J, Meyer, Bernard S, Millerd, Adèle, Paech, K, Robertson, R. N, Seifriz, W, Simonis, Wilhelm, Spanner, D. C, Stadelmann, Eduard, Stålfelt, M. G, Stocker, Otto, Stocking, C. Ralph, Umrath, Karl, Wartiovaara, Veijo, Ullrich, H

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Aufbau · Speicherung · Mobilisierung und Umbildung der Kohlenhydrate / Formation · Storage · Mobilization and Transformation of Carbohydrates von Åberg, Börje, Albaum, Harry G, Arnold, August, Badenhuizen, N. P, Bourne, E. J, Dangschat, Gerda, Fåhraeus, Gösta, Fischer, Hermann, Foster, A. B, Goerdeler, Joachim, Gottschalk, Alfred, Hassid, W. Z, Haurowitz, Felix, Helder, R. J, Henglein, F. A, Hirst, Edmund L, Jones, J. K. N, Jucker, E, Kerstan, Gerhard, Lovern, J. A, Miller, Erston V, Neumüller, Gunnar, Preston, R. D, Rånby, Bengt G, Shafizadeh, F, Stacey, M, Stoll, Arthur, Veibel, Stig, Vollmert, Bruno, Wagner, Adolf, Wanner, Hans, Weber, Hans, Whelan, W. J, Wolf, Johannes, Wolfrom, Melville L, Young, E. Gordon

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Light-dependent rubidium uptake into isolated mesophyll protoplasts from leaves of Pisum sativum [light-dark effect, ion uptake] von Leurs, C. J., Winter, H., Wiersema, P. K., Helder, R. J.

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Carbon assimilation pattern in the submerged leaves of the aquatic angiosperm: Vallisneria spiralis L von Helder, R.J, Harmelen, M.V

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ANALYSIS OF THE PROCESS OF ANION UPTAKE OF INTACT MAIZE PLANTS von HELDER, R. J.

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AN ELECTRON‐MICROSCOPICAL STUDY OF THE PLASMODESMATA IN THE ROOTS OF YOUNG BARLEY SEEDLINGS von Helder, R. J., Boerma, J.

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POLAR TRANSPORT OF LABELLED RUBIDIUM IONS ACROSS THE LEAF OF POTAMOGETON LUCENS von Helder, R. J., Boerma, J.

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Exchange and polar transport of rubidium ions across the leaves of Potamogeton von Helder, R.J, Boerma, J

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Aufbau · Speicherung · Mobilisierung und Umbildung der Kohlenhydrate / Formation · Storage · Mobilization and Transformation of Carbohydrates von Arnold, A

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THE ABSORPTION OF LABELLED CHLORIDE AND BROMIDE IONS BY YOUNG INTACT BARLEY PLANTS von HELDER, R. J.

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The mechanism of bicarbonate assimilation by the polar leaves of Potamogeton and Elodea . CO sub(2) concentrations at the leaf surface von Prins, HBA, Snel, JFH, Zanstra, P E, Helder, R J

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STUDIES ON THE ABSORPTION, DISTRIBUTION AND RELEASE OF LABELLED RUBIDIUM IONS IN YOUNG INTACT BARLEY PLANTS von HELDER, R. J.

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