Calliactis parasitica
Inhibition and Rhythmic Activity of the Circular Muscles of Calliactis Parasitica (Couch)
... Effect of intercalated shocks upon the latency of response L of the circular muscle of the pedal ring of Calliactis parasitica A standard stimulus'of ten shocks at a shock interval of 2-[r] ...
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Oxygen Consumption by the Sea Anemone Calliactis Parasitica (Couch)
... Strip-chart records of the oxygen concentration of water which had just passed a specimen of Calliactis commonly showed rhythmic fluctuations, either of low amplitude and high frequency [r] ...
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Co Ordination of Pedal Disk Detachment in the Sea Anemone Calliactis Parasitica
... tricolor and Dardanus venosus, the crab needs to play no part in the transfer; the detachment of the pedal disk and subsequent 'shellclimbing' result from a response of the anemone's ten[r] ...
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Spontaneous Electrical Activity in the Sea Anemone Calliactis Parasitica
... senile occur both spontaneously and in response to electrical stimulation, and Batham & Pantin 1954 suggested that the larger observed spontaneous contractions coincide with bursts of se[r] ...
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Estermeier, Michael (2004): Isolierung, Strukturaufklärung und Synthese von Pyrido[2,3,4-kl]acridin-Alkaloiden aus der Seeanemone Calliactis parasitica (Actiniaria). Dissertation, LMU München: Fakultät für Chemie und Pharmazie
... Extraktion der violetten Lösung mit Dichlormethan (3 × 500 ml) werden die vereinigten organischen Phasen eingeengt, über Natriumsulfat getrocknet, und das Lösungsmittel im Vakuum ent[r] ...
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Nerve Nets and Conducting Systems in Sea Anemones: Two Pathways Excite Tentacle Contractions in Calliactis Parasitica
... Single shocks to the column may elicit tentacle movements - either an 'early' contraction after a through-conducting nerve net TCNN pulse or a 'delayed' contraction after an ectodermal s[r] ...
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Delayed initiation of SS1 pulses in the sea anemone Calliactis parasitica: evidence for a fourth conducting system
... Delayed SSi pulses can also be evoked by electrical, and in some cases mechanical, stimulation of the pedal disc, tentacles, and pharynx, but there are regional differences in the number[r] ...
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The transmission of impulses in the ectodermal slow conduction system of the sea anemone Calliactis parasitica (Couch)
... By combining the electrophysiological and electron microscopical evidence given above, it is possible to calculate the amount of delay as an SS1 pulse crosses each cell boundary, assumin[r] ...
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Facilitation in Sea Anemones IV The Quick Response of Calliactis Parasitica at High Temperatures
... Now if facilitation could be speeded up more than excitation, say by raising the temperature, so that some facilitation is set up before the excitatory state has died away, one should ge[r] ...
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Quick and Slow Contractions in the Isolated Sphincter of the Sea Anemone, Calliactis Parasitica
... Slow contractions of Calliactis sphincter preparations at different frequencies of stimulation, a Stimulated until beginning of slow contraction 180 C ; 6 5 stimuli only at frequencies [r] ...
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Excitatory Actions of Antho RFamide, An Anthozoan Neuropeptide, on Muscles and Conducting Systems in the Sea Anemone Calliactis Parasitica
... Circular muscle rings from the mid-column, below the sphincter, and muscle rings from the column base were always spontaneously active and also responded with an increase in tone, freque[r] ...
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Excitatory and Inhibitory Control of Inherent Contractions in the Sea Anemone Calliactis Parasitica
... The symmetrical parietal muscle contraction seen in the spontaneous contraction cycle may thus result not from the nerve-net burst but from a removal of inhibition of inherent activity d[r] ...
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Diffusion of Oxygen through the Mesogloea of the Sea Anemone Calliactis Parasitica
... By placing fully aerated water in both sides, the fall in concentration in the right half-cell due to consumption by the electrode and possibly by the mesogloea could be measured and sub[r] ...
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Two Slow Conduction Systems in the Sea Anemone Calliactis Parasitica
... SSi activity is recorded by electrodes on any part of the ectoderm tentacles, oral disk, column and pedal disk following electrical stimulation of any ectodermal region.. The SPi is larg[r] ...
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Control of the Pacemaker System of the Nervenet in the Sea Anemone Calliactis Parasitica
... • Intervals in a burst where SS 2 was stimulated during the 3rd interval; O, D intervals during preceding and following bursts, b Effect of several spontaneous SS 2 pulses on nerve-net p[r] ...
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Nerve Net Pacemakers and Phases of Behaviour in the Sea Anemone Calliactis Parasitica
... Detachment causes frequent nerve net bursts: a pre-settling phase The spontaneous electrical activity of an anemone attached to a shell could generally be predicted by the anemone's appe[r] ...
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The role of L Dopa in the nervous system of sea anemones: a putative inhibitory transmitter in tentacles
... Permeability barriers in the ectodermal and endodermal epithelia probably reduce the penetration of chemicals. Direct evidence for this has been obtained by McFarlane et al. (1991), who showed that in an untrimmed ...
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Behavioural physiology of sea anemones
... excitable components of ectoderm and endoderm is also encountered in the shell-climbing response of Calliactis parasitica (McFarlane, 1969c) and in the swimming response of Stomphia coccinea (Robson, ...
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Evolution of cuticular hydrocarbons in the hymenoptera : a meta analysis
... primitive Parasitica pro- duced almost all types of olefins and methylalkanes, which suggest that the majority of CHC classes and their associated biochemical pathways were already present early in Hymenoptera ...
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Production of polygalacturonases in isolates of Cryphonectria cubensis of differing pathogenicity
... Cryphonectria cubensis causes a serious stem canker disease on Eucalyptus in tropical and subtropical parts of the world. Previously, it was shown that isolates of C. cubensis display varying levels of pathogenicity. The ...
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