ESEMPIO
Osborne, Thomas Burr:The Vegetable Proteins
- nuovo libro 2009, ISBN: 0217400833, Lieferbar binnen 4-6 Wochen
Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 166 Seiten, L=152mm, B=229mm, H=10mm, Gew.=249gr, Kartoniert/Broschiert, Klappentext: Purchase of … Altro …
Internationaler Buchtitel. In englischer Sprache. Verlag: Cambridge Scholars Publishing, 166 Seiten, L=152mm, B=229mm, H=10mm, Gew.=249gr, Kartoniert/Broschiert, Klappentext: Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER II. OCCURRENCE OF PROTEINS IN DIFFERENT PARTS OF PLANTS, AND THEIR GENERAL CHARACTERISTICS. Proteins are found in the living parts of all plants. They occur in the dissolved state in the circulating fluids and in the solutions of the cell vacuoles, that is in the cell sap. In a semi-dissolved state they occur in the protoplasm, and in the undissolved state as reserve protein in the cells of seeds, tubers, bulbs, buds and roots. In many of the cells of these parts of the plant the undissolved protein is found in the form of well-developed crystals of various forms, formerly called crystalloids; in irregular, semi-crystalline forms with faces and angles on a part of their surface, and as regular or distorted spheres, all of which several forms are found in aleurone grains; and in an amorphous, finely granular form, generally designated aleurone. The reserve protein occurs in the cells together with the non-nitrogenous reserve food materials, starch, oil, etc., which several substances fill the cells, leaving a thin layer of dried protoplasm between them and the cell wall cf. Hartig (148, 149); Radlkofer (388); Nageli (286); Schimper (453); Schulz (462)]. In most monocotyledonous plants the cells of the endosperm and embryo occupy distinct parts of the seed. The tissues of the endosperm of such seeds when fully ripe are, therefore, made up of cells which are almost entirely filled with the reserve food substances, since the thin layer of protoplasm next to the cell wall forms a very small part of the contents of the cell. The tissues of the embryo contain protein associated with a greater variety of substances than are present in the cells of the endosperm, and are also rich in nucleated cells, in which much of the protein apparently exists in thechromatin sub...<
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