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      Lipids of aquatic organisms as potential contributors to lacustrine sediments—II

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      Organic Geochemistry
      Elsevier BV

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          Leaf epicuticular waxes.

          The external surface of the higher plants comprises a cuticular layer covered by a waxy deposit. This deposit is believed to play a major part in such phenomena as the water balance of plants and the behavior of agricultural sprays. The wax contains a wide range of organic compounds. These complex mixtures are amenable to modern microchromatographic and microspectrometric analytical procedures. The few surveys which have been made of the species distribution of certain classes of constituents indicate that such distribution may be of limited taxonomic value; however, the wax composition of a species may differ for different parts of the same plant and may vary with season, locale, and the age of the plant. This fascinating subject, in which the disciplines of botany, biochemistry, chemistry, and physics overlap and interact, is still in a very active state. Much remains to be learned about the composition and fine structure of the wax deposits, and, for this, experimental study of wax crystallization and permeation through artificial membranes will be required. Enzymic studies, radiolabeling, and electron microscopy will be needed to reveal the mode of biogenesis of the wax constituents and their site of formation and subsequent pathway through the cuticle to the leaf surface.
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            The Hopanoids: palaeochemistry and biochemistry of a group of natural products

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              Dinoflagellate origin for sedimentary 4α-methylsteroids and 5α(H)-stanols

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                Author and article information

                Journal
                Organic Geochemistry
                Organic Geochemistry
                Elsevier BV
                01466380
                January 1987
                January 1987
                : 11
                : 6
                : 513-527
                Article
                10.1016/0146-6380(87)90007-6
                b282a528-b310-4975-a6c6-97ce4ed27291
                © 1987

                http://www.elsevier.com/tdm/userlicense/1.0/

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