Results 231 to 240 of about 28,732 (262)
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Development: Sea anemone segments polarise
Current Biology, 2023The evolutionary origin of animal segmentation has been debated for centuries. A new study now reveals genetic similarities between the patterning of segmental pouches in a sea anemone, traditionally considered as unsegmented, and segmental structures of vertebrates and arthropods.
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Science, 1983
Chitin, which is widely distributed among life forms, is well documented in the coelenterate class Hydrozoa and is contained in one member of class Scyphozoa. In class Anthozoa, hard corals synthesize it but soft corals do not. Chitin was identified by infrared spectrophotometry in the trochoid shell of the actinian Stylobates
D F, Dunn, M H, Liberman
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Chitin, which is widely distributed among life forms, is well documented in the coelenterate class Hydrozoa and is contained in one member of class Scyphozoa. In class Anthozoa, hard corals synthesize it but soft corals do not. Chitin was identified by infrared spectrophotometry in the trochoid shell of the actinian Stylobates
D F, Dunn, M H, Liberman
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Journal of the Marine Biological Association of the United Kingdom, 1989
Many techniques have been devised to overcome certain problems encountered when narcotising actiniarians. From these a few have been selected as being at least partly successful. Further modifications to these narcotising methods have been introduced in order to block more effectively the nervous pathways responsible for secondary contraction reactions.
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Many techniques have been devised to overcome certain problems encountered when narcotising actiniarians. From these a few have been selected as being at least partly successful. Further modifications to these narcotising methods have been introduced in order to block more effectively the nervous pathways responsible for secondary contraction reactions.
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European Journal of Pediatric Dermatology, 2015
Sea anemone dermatitis is not uncommon, although in the literature of the past 40 years there are only 14 reports. In the child it is due to contact while sitting on rocks just below the surface or during underwater exploration; it may also be due to careless play in the child that knows the damaging effects of this coelenterate (1).
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Sea anemone dermatitis is not uncommon, although in the literature of the past 40 years there are only 14 reports. In the child it is due to contact while sitting on rocks just below the surface or during underwater exploration; it may also be due to careless play in the child that knows the damaging effects of this coelenterate (1).
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Structures of sea anemone toxins
Toxicon, 2009Sea anemones produce a variety of toxic peptides and proteins, including many ion channel blockers and modulators, as well as potent cytolysins. This review describes the structures that have been determined to date for the major classes of peptide and protein toxins.
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Sea anemones possess dynamic mitogenome structures
Molecular Phylogenetics and Evolution, 2014A notable feature of hexacoral mitogenomes is the presence of complex self-catalytic group I introns. We investigated mitogenome structural variations and evolutionary mechanisms in actiniarian sea anemones based on the complete mitogenome sequence of the cold-water sea anemone species Urticina eques, Bolocera tuediae, Hormathia digitata and Metridium ...
Åse, Emblem +6 more
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Unusual arsenic speciation in sea anemones
Chemosphere, 2008Nine species of sea anemones (Anthopleura asiatica, Actinia equina, Actinodendron arboreum, Phymanthus loligo, Entacmaea actinostoloides, Stichodactyla gigantea, S. haddoni, S. mertensii and Metridium senile) contained arsenic in the range of 1.6-7.0microg As g(-1) (wet mass basis). Irrespective of the species, water-soluble arsenic compounds accounted
Tran Dang, Ninh +2 more
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Anthopleurine: A Sea Anemone Alarm Pheromone
Science, 1975The sea anemone Anthopleura elegantissima responds with characteristic contraction to a pheromone released by wounded conspecifics. The alarm pheromone was isolated by ion-exchange chromatography and identified by chemical and spectroscopic methods as the quaternary ammonium ion (3-carboxy-2,3-dihydroxy-
N R, Howe, Y M, Sheikh
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Journal of the Marine Biological Association of the United Kingdom, 1959
A sea anemone, normally a passive-looking animal, reacts to suitable food-stuffs by a series of fairly complicated activities. When its tentacles encounter solid food there is, first of all, a discharge of cnidae, which poison living prey and adhere to the food mass.
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A sea anemone, normally a passive-looking animal, reacts to suitable food-stuffs by a series of fairly complicated activities. When its tentacles encounter solid food there is, first of all, a discharge of cnidae, which poison living prey and adhere to the food mass.
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Journal of Experimental Biology, 1945
ABSTRACT The action of a number of drugs which affect the neuromuscular systems of vertebrates has been examined on the sea anemone, Calliactis parasitica. In contrast to their action in vertebrates, no drugs directly cause contraction in the muscles of the anemone.
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ABSTRACT The action of a number of drugs which affect the neuromuscular systems of vertebrates has been examined on the sea anemone, Calliactis parasitica. In contrast to their action in vertebrates, no drugs directly cause contraction in the muscles of the anemone.
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