Download Chemical Zoology. Porifera, Coelenterata, And by Marcel Florkin PDF

By Marcel Florkin

Chemical Zoology, quantity II: Porifera, Coelenterata, and Platyhelminthes provides chemical details on zoological importance. This e-book is prepared into 3 sections; every one part bargains with the organic and biochemical elements of the explicit phylum.
The first part examines 3 huge periods of Porifera, specifically, Calcarea, Demospongiae, and Hexactinellida. It describes the skeletal constitution, pigments, food, digestion, composition, middleman metabolism, and hibernation of Porifera. the second one part covers the type, pigments, feeding reaction, digestion, meals, ecology, pharmacology, and middleman metabolism of Coelenterata. The final part is dedicated to the type, food, digestion, breathing and middleman metabolism, development, improvement, and tradition tools, in addition to the chemical points of ecology of Platyhelminthes.
This publication is a useful source for zoologists and biochemists.

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ELECTRON TRANSPORT S Y S T E M The mitochondria are the usual site of an electron transport system. Agrell (1952) has reported 15-20 mitochondria per cell of H. panicea, and Ruthmann (1965) has shown by electron microscopy that the mitochondria of E. fluviatilis archaeocytes have well-defined cristae and typical double membrane. The literature seems to contain no reports of spectroscopic examination of sponges for the presence of cytochromes. The 8 4 % inhibition of oxygen consumption of Ephydatia mülleri gemmules by 10 mM cyanide (Rasmont, 1962) argues for a cytochrome oxidase.

Gross et al. have isolated from Spongia graminea, a bath sponge, two different kinds of collagens. One, spongin B , was prepared by extrac­ tion after incubation with trypsin and centrifugation of the extracts, providing large branched fibers. After dilution of the supernatant, a new centrifugation resulted in the precipitation of spongin A. Electron microscopy confirmed the collagen nature of both spongin A and spongin Β of Spongia graminea. The hydroxyproline and glycine content of both proteins also confirmed their collagen nature.

Z. Physiol. Chem. 258, 6. Yamaguchi, M. ( 1 9 5 7 ) . Bull Chem. Soc. Japan 30, 111 and 9 7 9 . Yamaguchi, M. ( 1 9 5 8 ) . Bull Chem. Soc. Japan 31, 5 1 and 7 3 9 . Yamaguchi, M. ( 1 9 5 9 ) . Bull Chem. Soc. Japan 32, 1 1 7 1 . 41 CHAPTER 4 Nutrition and Digestion Raymond Rasmont I. The Sponges as Filter Feeders II. The Sponges as Saprotrophs III. The Sponges as Symbionts A. Unicellular Algae B. Bacteria C. Technical Implications of the Existence of Symbionts IV. Conclusions References 43 46 47 47 49 49 50 50 The observation that sponges are weaponless sessile animals irrigated by an unceasing flood of water postulates that they draw their food from one or several of the following sources: ( 1 ) the particles—living or not —suspended in the water; ( 2 ) soluble nutrients dissolved in it; ( 3 ) the bodies of symbiotic organisms or the products of their activity.

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