Embryogenesis in Hymenolepis diminuta. IV. Distribution of succinic dehydrogenase, reduced form of nicotinamide-adenine dinucleotide oxido-reductase, and cytochrome oxidase |
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| Authors: | K Rybicka |
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| Affiliation: | 1. School of Engineering, University College Cork, College Road, Cork, Ireland;2. Nigerian Electricity Management Services Agency (NEMSA), Wuse 2, Abuja, Nigeria;3. Marine Renewable Energy Ireland Research Centre, University College Cork, Ringaskiddy, Co. Cork, Ireland;4. Department of Electrical and Electronic Engineering, School of Engineering, University College Cork, College Road, Cork, Ireland;1. Department of Neonatal Medicine, The Royal Children''s Hospital, Melbourne, Australia;2. Department of Paediatrics, University of Melbourne, Melbourne, Australia;3. Victorian Infant Brain Studies, Murdoch Children''s Research Institute, Melbourne, Australia;4. Premature Infant Follow-Up Programme, Royal Women''s Hospital, Melbourne, Australia;5. Neonatal Research, Murdoch Childrens Research Institute, Melbourne, Australia;6. Little Peeps Paediatric Occupational Therapy, Melbourne, Australia;7. Developmental Disability and Rehabilitation Research, Murdoch Children''s Research Institute, Melbourne, Australia;8. Department of Speech Pathology, The Royal Children''s Hospital, Melbourne, Australia |
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| Abstract: | High activity of succinic dehydrogenase and NADH-oxido-reductase occurred in gonads and embryos of Hymenolepis diminuta. In embryos the highest enzymatic activity occurred in the inner envelope during the preoncosphere phase. The active layer seems to be connected with the formation of the shell and the embryophore. Toward the end of development, enzymatic activity in the envelope decreased. Succinic dehydrogenase and NADH-oxido-reductase activity demonstrable inside the embryos showed lower activity than was observed in the envelope. Cytochrome oxidase was not demonstrated in the course of embryogenesis, but some traces of this enzyme appeared in the mature oncosphere with varied reaction. The study raises the problem of terminal oxidation processes in cestode embryos. |
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