Chemical Zoology. Porifera, Coelenterata, And by Marcel Florkin

By Marcel Florkin

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

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1956). B. 1 Μ malonate, a competitive inhibitor of succinic dehydrogenase 14 (Agrell, 1952). In experiments on C 0 2 uptake, C-labeled succinic, fumaric, and malic acids were found in an acetone extract of Hymeniacidon heliophila (Hammen and Osborne, 1959). 9 1955), but such negative results do not dis­ prove the existence of the Krebs cycle, which seems here to stay. Reduction of nicotinamide adenine dinucleotide phosphate (NADP) 5. COMPOSITION AND INTERMEDIARY METABOLISM 55 on addition of isocitrate to extracts of Tedania ignis and Dysidea etherea (Candelas, 1965) indicates an isocitrate dehydrogenase of the type ordinarily found in the soluble fraction of cells.

In some cases, the alga has been cultivated outside the sponge (Van Trigt, 1919). How­ 11 ever, the same author counted 3 Χ 1 0 zoochlorellae per liter of tissue 3 in green spongillidae gathered from the field, against 4 χ 1 0 algae of the same species per liter of the surrounding water. This observation can be interpreted as an indication that the conditions within the sponge are in favor of a rapid multiplication of the algae. Another interpreta­ tion seems possible, though less likely: it is that the sponges may feed on free-living algae, and had captured many more of these than they could digest.

1 9 6 5 ) . Soc. Fra. Micr. Electron. Colloq. Ann. p. 60. , and Porte, A. ( 1 9 6 2 ) . Cahiers Biol. Marine 3, 307. Pourbaix, N. (1931). Bull. Sta. Oceanogr. Salammbo No. 23. Pourbaix, N. (1932a). Ree. Inst. Zool. Τorley-Rousseau 4, 31. Pourbaix, N. (1932b). Ann. Soc. Roy. Zool. Belg. 63, 11. Pourbaix, N. ( 1 9 3 3 ) . Inst. Espan. , Notas Resumenes, Ser. II 69. Rasmont, R. ( 1 9 5 4 ) . Bull. , Acad. Roy. Belg. [5] 40, 288. Rasmont, R. ( 1 9 5 9 ) . Ann. Sei. Nat. Zool. Biol. Animale 12, 253.

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