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  1. No Access

    Chapter

    SERS-spectroscopic investigations of mints

    Micro Raman-spectroscopy is a powerful tool for the investigation of microstructured samples. As already shown, it is possible to identify and to determine the spatial distributions of several alkaloids in liana ...

    P. Rösch, J. Popp, W. Kiefer… in Spectroscopy of Biological Molecules: New … (1999)

  2. No Access

    Chapter

    Melissa officinalis L. (Lemon Balm): In Vitro Culture and the Production and Analysis of Volatile Compounds

    The genus Melissa belongs to the family Labiatae (Lamiaceae) and comprises erect branched herbs with crenate opposite leaves and a two-lipped corolla. It includes very few species, which chiefly occur in many par...

    W. Schultze, S. Hose, A. Abou-Mandour, F.-C. Czygan in Medicinal and Aromatic Plants V (1993)

  3. No Access

    Article

    The influence of phytohormones on growth, organ differentiation and fructan production in callus of Symphytum officinale L.

    Callus derived from Symphytum officinale L. regenerants was cultured in the presence of various phytohormones. The growth rate of callus was stimulated by all phytohormones at various concentrations. With 1-napht...

    D. Haaß, A. A. Abou-Mandour, W. Blaschek, G. Franz, F. C. Czygan in Plant Cell Reports (1991)

  4. No Access

    Article

    Differences in the susceptibility to light stress in two lichens forming a phycosymbiodeme, one partner possessing and one lacking the xanthophyll cycle

    The effect of high light levels on the two partners of a Pseudocyphellaria phycosymbiodeme (Pseudocyphellaria rufovirescens, with a green phycobiont, and P. murrayi with a blue-green phycobiont), which naturally ...

    B. Demmig-Adams, W. W. Adams III, T. G. A. Green, F. -C. Czygan, O. L. Lange in Oecologia (1990)

  5. No Access

    Article

    An analysis of needle yellowing in healthy and chlorotic Norway spruce(Picea abies) in a forest decline area of the Fichtelgebirge(N.E. Bavaria)

    In a forest decline area (Fichtelgebirge, N.E. Bavaria, FRG), annual time courses of chloroplast pigments in both healthy and chlorotic Norway spruce were studied. The seasonal time courses of green and appare...

    B. Köstner, F. -C. Czygan, O. L. Lange in Trees (1990)

  6. No Access

    Article

    Photosynthetic capacity, chloroplast pigments, and mineral content of the previous year's spruce needles with and without the new flush: analysis of the forest-decline phenomenon of needle bleaching

    Spruce (Picea abies) damage in the Fichtelgebirge (FRG) occurs as needle bleaching and a depression of CO2 assimilation. Such injury may primarily result from the direct, above-ground effects of air pollution or ...

    O. L. Lange, H. Zellner, J. Gebel, P. Schramel, B. Köstner, F.-C. Czygan in Oecologia (1987)

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    Article

    Abstracts of short lectures

    H. W. Rauwald, J. Conner, A. Gray, T. Reynolds, P. Waterman… in Pharmaceutisch Weekblad (1987)

  8. No Access

    Chapter

    Arzneipflanzen im Spiegel Niederländischer Malerei

    Medicinal plants and their compounds (such as essential oils) have been presented in the fine arts of many periods of civilization. They have been from former times up to now not only subjects of lyric poetry ...

    F.-C. Czygan in Essential Oils and Aromatic Plants (1985)

  9. No Access

    Article

    Canthaxanthin als Sekundär-Carotinoid einiger Grünalgen

    The ketonic carotenoid canthaxanthin has been isolated from three nitrogen-starved strains ofChlorella.

    F. -C. Czygan in Experientia (1964)

  10. No Access

    Article

    Seasonal changes in the nitrate-reducing activity of a green alga

    Trotz konstanter Kultur- und Versuchsbedingungen zeigt die Nitratreduktion intakter Zellen und zellfreier Extrakte der GrünalgeAnkistrodesmus braunii ausgeprägte jahresperiodische Schwankungen. Das Aktivitätsmaxi...

    E. Kessler, F. C. Czygan in Experientia (1963)