English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

For the barnacle photoreceptors it is estimated that at 20°C a half-maximal flash response requires the photic activation of 1% of the tubulous microvilli. The decrease of photo-electric efficiency at high intensities and low temperature is attributed to less efficient 2 quantum activation of microvilli. The estimate of the light induced charge flux yields evidence for ionic depletion in an extracellular space which is restricted by glia cells. The integration of the current during the transient of the response to steps of intense light yields limits for the extracellular volume which are in accord with electron microscopic results. The observed reaction scheme with a ratio of latency time : duration of response : adaptation time independent of temperatur and type of photoreceptor is in a model explained with the same transfer processes occuring in volume elements of different size. A brief review of photoreceptors of other animals shows that in spite of different durations of the responses the reaction scheme of flash responses and the photo-electric efficiency (≈ 10 5  ions per absorbed photon) are similar for different photoreceptors.

On the Mechanism of Electric Response of the Photoreceptors of the Barnacle and Other Animals