Retinal Structure. Mollusc Cephalopods: Octopus, Sepia
نویسندگان
چکیده
منابع مشابه
Retinal Structure. Mollusc Cephalopods: Octopus, Sepia
*Research aided by grant (G-199) and summer Travel Fellowship (1957) from the National Council to Combat Blindness, Inc., and in part from the United States Public Health Service, Institute of Neurological Diseases and Blindness (B-397). Received for publ~catlon, July 7, 1958. chemical study of photoreceptors in our laboratory (1-5). The invertebrate photoreceptors have recently been reviewed b...
متن کاملSteroidogenesis in the brain of Sepia officinalis and Octopus vulgaris.
The presence of vertebrate-like steroids, steroidogenic enzymes and steroid receptors has been reported exclusively in cephalopods gonads. The role played by these steroids has been also recently investigated. We here give evidence of steroidogenic activity in the brain of cephalopods. The activity of two key steroidogenic enzymes: 3beta-hydroxysteroid dehydrogenase (HSD) and 17beta-HSD is pres...
متن کاملNeurogenesis in Cephalopods: “eco-evo-devo” Approach in the Cuttlefish Sepia Officinalis (mollusca-cephalopoda)
Cephalopods are new evolutionary and ecological models. By their phylogenetic position (Lophotrochozoa, Mollusca), they provide a missing master piece in the whole puzzle of neurodevelopment studies. Their derived and specific nervous system but also their convergence with vertebrates offer abundant materials to question the evolution and development of the nervous system of Metazoa (evo-devo s...
متن کاملEmergence of sensory structures in the developing epidermis in sepia officinalis and other coleoid cephalopods.
Embryonic cuttlefish can first respond to a variety of sensory stimuli during early development in the egg capsule. To examine the neural basis of this ability, we investigated the emergence of sensory structures within the developing epidermis. We show that the skin facing the outer environment (not the skin lining the mantle cavity, for example) is derived from embryonic domains expressing th...
متن کاملAntibacterial Activity of Certain Cephalopods from Andamans, India
Cephalopods are well known for their bioactive secondary metabolites like Ink and very few studies have been carried with respect to bioactivity of their tissues. This study focuses on the antibacterial activity of the methanolic extracts from the body tissues of selected cephalopod species Sepioteuthis lessoniana, Sepia brevimana and Octopus cyaneus against five human pathogens. Gram positive ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Biophysical and Biochemical Cytology
سال: 1958
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.4.6.835