WorldCat Identities

Hamdorf, K.

Works: 5 works in 6 publications in 3 languages and 51 library holdings
Genres: Laboratory manuals 
Roles: Author
Publication Timeline
Most widely held works by K Hamdorf
Praktikum der Zoophysiologie by Carl Schlieper( Book )

2 editions published in 1977 in German and held by 4 WorldCat member libraries worldwide

Fotorecepcija by Peter Stušek( Book )

1 edition published in 1987 in Slovenian and held by 1 WorldCat member library worldwide

Photoregeneration and sensitivity control in UV-photoreceptors = Photoregeneration und Bereichseinstollung der Empfindlichkeit heim UV=Rezeptot by K Hamdorf( Book )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

Properties of pupil mechanisms in owl-fly Ascalaphus macaronius (Neuroptera) by Peter Stušek( )

1 edition published in 1999 in English and held by 1 WorldCat member library worldwide

Regulation of light Hux by pupil mechanisms in the UV-sensitive superposition eye of owl-fly Ascalaphus macaronius (Neuroptera) was studied with a fast reflection microspectrophotometric technique. The spectral sensitivity of pupil reaction, which was calculated on the basis of changes of transient amplitude reftection, was almost identical with the one of Deilephila eye. This indicates that in spite of different life styles and spectral sensitivities of photoreceptors pupil closing is triggered by the same photosensitive structure in both eyes. By measuring the spectra of reftected light from the Ascalaphus eye between 400 and 700 nm after different dark periods following light stimulation, it was established that the restoration of reflection was much faster in the red than in the blue spectral range. Based on this, we propose that two different pupil mechanisms with different spectral absorption characteristics are involved in light-Hux regulation. Fast-reacting pupil is probably represented by screening pigment migration in the secondary pigment cells and a slow blue-absorbing system by the activity in primary pigment cells. The importance of two different pupils for the photoregeneration of visual pigment is discussed
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