نتایج جستجو برای: کلیدی pelagia noctiluca
تعداد نتایج: 43073 فیلتر نتایج به سال:
The unicellular organism, Noctiluca, has been examined with the electron microscope. The nucleus is small compared to the very large size of the cell, but the nuclear border has an organization which indicates an active nucleocytoplasmic exchange. Whereas annuli are missing over most parts of the nuclear membrane proper, there are "annulated vesicles" in a layer inside the nuclear membrane. The...
A dinoflagellate bloom ("red tide" event) dominated by the toxic Gymnodinium catenatum Graham (Gymnodiniales, Dinophyceae; 99.7%) and the noxious Noctiluca scintillans (Mcartney) Kofoid (Noctilucaceae, Dinophyceae; 0.3%) was observed in Bahia de Mazatlán Bay, México, on 24-26 January 2000. Photographic and microscopic analysis of samples during such an event, allowed us to collect evidence of a...
B1 Periodic fever, aphthous stomatitis, pharyngitis, and adenopathy syndrome (PFAPA) in a 17 years old girl – case report Erato Atsali, Dimitra Kassara, Pelagia Katsimbri, Sorina Boiu, Dimitrios T. Boumpas, Vana Papaevangelou Pediatric Rheumatology Unit,3RD Department of Pediatrics, National and Kapodestrian University of Athens, Medical School, Athens, Greece; Joint Rheumatology Program,4TH De...
The Mediterranean Sea is home to numerous species of jellyfish, both native and invasive. Some of these jellyfish, which here include pelagic cnidarians, ctenophores and salps, have been monitored for centuries, while others are rarely sampled or studied. In addition, particular species of jellyfish are of high public interest due to impacts on tourism and other human activities, yet others may...
1. The experiments demonstrate that when a constant electric potential of sufficient intensity is applied to Noctiluca, the protoplasmic films which represent a part of the visible continuous phase of the cytoplasm and plasma membrane at the surface of the cell, become unstable and break down, thus releasing the acid contents of one of the internal discontinuous phases present in the cytoplasm ...
Male glow-worms Lampyris noctiluca find their bioluminescent mates at night by phototaxis. There is good evidence that location of mates by lampyrid beetles is achieved by a single spectral class of photoreceptor, whose spectral sensitivity is tuned to the bioluminescent spectrum emitted by conspecifics, and is achromatic. We ask whether glow-worm phototaxis involves interactions between two sp...
The gene coding for beetle luciferase, the enzyme responsible for bioluminescence in over two thousand coleopteran species has, to date, only been characterized from one Palearctic species of Lampyridae. Here we report the characterization of the luciferase gene from a female beetle of an Iranian lampyrid species, Nyctophila cf. caucasica (Coleoptera:Lampyridae). The luciferase gene was compose...
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