Ueber Moor Und Moorb Der

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Zentralblatt Der Bauverwaltung

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Author :
language : de
Publisher:
Release Date : 1891

Zentralblatt Der Bauverwaltung written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1891 with categories.

The Vascular Cambium

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Author : Philip R. Larson
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

The Vascular Cambium written by Philip R. Larson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.

The cambium has been variously defined as follows: "The actively dividing layer of cells that lies between, and gives rise to, secondary xylem and phloem (vascular cambium)" (IAWA 1964); "A meristem with products of periclinal divisions commonly contributed in two directions and arranged in radial files. Term pre ferably applied only to the two lateral meristems, the vascular cambium and cork cambium, or phellogen" (Esau 1977); and, "Lateral meristem in vascular plants which produces secondary xylem, secondary phloem, and parenchyma, usually in radial rows; it consists of one layer of initials and their undifferentiated deriva tives" (Little and Jones 1980). Clearly, the cambium is a diverse and extensive meristem, and no one defini tion will encompass all manifestations of what anatomists consider cambium. Its diversity and extent are further exemplified by a single plant, such as a temperate zone tree, in which procambium is initiated in the embryo and perpetuated throughout every lateral, primary meristem before giving rise to cambium in the secondary body. The cambium thereafter performs its meristematic task of producing daughter cells that differentiate to specialized tissue systems. The cam bium, however, does not remain static. Its derivatives vary either in form, or TImc tion, or rate of production at different positions on the tree, with age of the tree, and with season of the year. Moreover, the cambium responds both to internal sig nals and to external stimuli such as environment or wounding.

Mischung Und Unsaat Der Grass Mereien Sowie Pflege Und Ertrag Der Graskulturen

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Author : J. Lehrke
language : de
Publisher:
Release Date : 1888

Mischung Und Unsaat Der Grass Mereien Sowie Pflege Und Ertrag Der Graskulturen written by J. Lehrke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1888 with Grasses categories.

Allgemeines Deutsches Sach W Rterbuch Aller Menschlichen Kenntnisse Und Fertigkeiten

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Author : Joseph M Liechtenstern
language : de
Publisher:
Release Date : 1830

Allgemeines Deutsches Sach W Rterbuch Aller Menschlichen Kenntnisse Und Fertigkeiten written by Joseph M Liechtenstern and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1830 with Encyclopedias and dictionaries, German categories.

Oekonomisches Reallexicon

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Author : Christian Friedrich Germershausen
language : de
Publisher:
Release Date : 1799

Oekonomisches Reallexicon written by Christian Friedrich Germershausen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1799 with categories.

Allgemeines Deutsches Sach W Rterbuch Aller Menschlichen Kenntnisse Und Fertigkeiten C In Verbindung Mit Mehreren Gelehrten Herausgegeben Von J Freiherrn V Liechtenstern Fortgesetzt Und Beendigt Von A Schiffner Supplementband

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Author : Joseph Marx von Baron LIECHTENSTERN
language : de
Publisher:
Release Date : 1830

Allgemeines Deutsches Sach W Rterbuch Aller Menschlichen Kenntnisse Und Fertigkeiten C In Verbindung Mit Mehreren Gelehrten Herausgegeben Von J Freiherrn V Liechtenstern Fortgesetzt Und Beendigt Von A Schiffner Supplementband written by Joseph Marx von Baron LIECHTENSTERN and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1830 with categories.

Annalen Der Erd Volker U Staatenkunde

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Author : DR. HEINRICH BERGHAUS
language : de
Publisher:
Release Date : 1843

Annalen Der Erd Volker U Staatenkunde written by DR. HEINRICH BERGHAUS and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1843 with categories.

Annalen Der Erd V Lker Und Staatenkunde

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Author :
language : de
Publisher:
Release Date : 1843

Annalen Der Erd V Lker Und Staatenkunde written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1843 with categories.

Transport In Plants Ii

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Author : U. Lüttge
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Transport In Plants Ii written by U. Lüttge and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

In the first part (Part A) of this volume on transport, there was an emphasis on the processes occurring at the membranes bounding the cells. It was convenient to distinguish active and passive processes of transport across the membranes, and to recognize that certain transport processes may be regulated by internal factors in the cells such as cytoplasmic pH, concentrations of ions, of malate or of sugar in the vacuoles, or the hydrostatic pressure. Cells in tissues and organs show the same kinds of properties as individual cells, but in addition there can be cell to cell transport related to the organization of the tissue. Firstly cells within a tissue are separated from the external solutions by a diffusion path comprising parts of the cell walls and intercellular spaces; more generally this extra-cytoplasmic part of the tissue has been called the apoplasm. A similar term is "free space". Secondly, the anatomy of cells in tissues seems to allow some facilitated, local transport between cells in a symplasm. Entry into the symplast and subsequent transport in a symplasmic continuum seems to be privileged, in that ions may not have to mix with the bulk of the cytoplasm and can pass from cell to cell in particular cytoplasmic structures, plasmodesmata. In Chara plants, this kind of transport is found operating across the multi-cellular nodes as the main means of transport between the long internodal cells.

Zur Orientirung In Marienbad Ein Rathgeber Und Wegweiser F R Curg Ste Siebente Vermehrte Und Verbesserte Auflage

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Author : LUCCA (Dr. Med.)
language : de
Publisher:
Release Date : 1874

Zur Orientirung In Marienbad Ein Rathgeber Und Wegweiser F R Curg Ste Siebente Vermehrte Und Verbesserte Auflage written by LUCCA (Dr. Med.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1874 with categories.