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1,157 results on '"Spatz H"'

15. The mechanical role of the endodermis in Equisetum plant stems

Author

Spatz, H.-Ch. and Emanns, A.

Subjects
Endoderm, Stems (Botany), Horsetail, Biological sciences
Abstract

The endodermis of different species of the genus Equisetum has different configurations, two or one continuous layers or a sheath only around the vascular bundles. The question whether the endodermis contributes to the mechanical stability of the aerial shoots is investigated in two ways: In a direct approach, the endodermis of segments of E. hyemale was dissected longitudinally and the mechanical stability against ovalization measured as a function of the orientation of the cuts with respect to the forces applied. A comparative approach tested the mechanical stability of eight different species of Equisetum against ovalization of the cross-section for samples, which were either fully turgescent or had reduced turgor pressure. The double-layer endodermis substantially contributed to the mechanical stability of E. affinis and E. hyemale. Equisetum arvense, E. pratense, E. sylvaticum, and E. telmateja are mechanically stabilized by their single layer of endodermis at least under conditions of low turgor pressure. Key words: endodermis: Equisetum; mechanical tests: turgot pressure.

Published
2004

16. Picksche Krankheit : Progressive umschriebene Großhirnatrophie

Author

Lüers, Th., Spatz, H., Lubarsch, O., editor, Henke, F., editor, Rössle, R., editor, Bodechtel, G., editor, Von Braunmühl, A., editor, Cobb, St., editor, Eicke, W.-J., editor, Erbslöh, F., editor, Friedrich, G., editor, Hallervorden, J., editor, Haymaker, W., editor, Jacob, H., editor, Krauland, W., editor, Lindenberg, R., editor, Lüers, Th., editor, Meessen, H., editor, Noetzel, H., editor, Nordmann, M., editor, Reichardt, M., editor, Scholz, W., editor, Spatz, H., editor, Stochdorph, O., editor, Strughold, H., editor, Ule, G., editor, Walthard, B., editor, and Walthard, K. M., editor

Published
1957
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21. Transfection in B. subtilis

Author

Trautner, T. A., Spatz, H. Ch., Arber, W., editor, Haas, R., editor, Henle, W., editor, Hofschneider, P. H., editor, Jerne, N. K., editor, Koldovský, P., editor, Koprowski, H., editor, Maaløe, O., editor, Rott, R., editor, Schweiger, H. G., editor, Sela, M., editor, Syruček, L., editor, Vogt, P. K., editor, and Wecker, E., editor

Published
1973
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