ZfN: Search Results

1	Author	K. Kirschfeld, B. Lutz	Requires cookie*
	Title	The Spectral Sensitivity of the Ocelli of Calliploora (Diptera)
	Abstract	The spectral sensitivity of the ocelli of C alliphora was determined by means of the electroretino-gram (ER G). Sensitivity is high in the spectral range from 340 to 450 nm ; with still increasing wavelengths it rapidly decreases. Analysis of the shape of the ERG resulting from stimuli of dif ferent wavelengths, as well as experiments with selective chromatic adaptation, indicate that there is mainly one spectral mechanism contributing to the response.
	Reference	(Z. Naturforsch. 32c, 439 [1977]; received March 21 1977)
	Published	1977
	Keywords	Insect Ocelli, Spectral Sensitivity, Colour Vision
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	TEI-XML for	default:Reihe_C/32/ZNC-1977-32c-0439.pdf
	Identifier	ZNC-1977-32c-0439
	Volume	32

2	Author	R. C. Hardie	Requires cookie*
	Title	E lectrophysiological Properties of R7 and R8 in D ipteran Retina
	Abstract	Intracellular recording and dye injection have directly demonstrated the absolute and spectral sensitivities of R7 and R8 in the eye of Calliphora. R8 has major peak of sensitivity at 547 nm with less than half the bandwidth of a theoretical rhodopsin, and a subsidiary peak at 358 nm. R7 is confirmed as being an ultraviolet receptor. Both have absolute sensitivities similar to those of R l —6. These results are inconsistent with the scotopic (R l —6), photopic (R7 and R8) theory of fly vision.
	Reference	(Z. Naturforsch. 32c, 887 [1977]; received August 29 1977)
	Published	1977
	Keywords	Diptera, Receptor, Central Rhabdomere, Spectral Sensitivity, Dye-injection
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	TEI-XML for	default:Reihe_C/32/ZNC-1977-32c-0887_n.pdf
	Identifier	ZNC-1977-32c-0887_n
	Volume	32

3	Author	R. C. Hardie, P. Duelli	Requires cookie*
	Title	Properties of Single Cells in Posterior Lateral Eyes of Jumping Spiders
	Abstract	Properties of single cells in the posterior lateral (PL) eyes of the jum ping spider Plexippus validus are described. Only one spectral class of cells was encountered and the spectra sensitivity was indistinguishable from that measured from the ERG , both peaking at ca. 535 nm. Angular sensi tivity (width of angular sensitivity function at the 50% level) averaged .89° ± .12°, the smallest value being .77°. Absolute sensitivity (reciprocal of the number of quanta of peak wavelength, on axis required to generate a 50% response) averaged 1.43 + 2 .5 X 1 0 -11 q _ 1 ,cm2,s. A ll cells studied were sensitive to the plane of polarised light. The per formance of receptors in the PL eyes is compared with that of receptors in the compound eyes of diurnal insects. It is concluded that the single lens eye system of spiders is in herently superior in design to the insect compound eye.
	Reference	Z. Naturforsch. 33c, 156—158 (1978); received November 8 1977
	Published	1978
	Keywords	Jumping Spiders, Receptors, Spectral Sensitivity, Angular Sensitivity, Absolute Sensitivity
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	TEI-XML for	default:Reihe_C/33/ZNC-1978-33c-0156_n.pdf
	Identifier	ZNC-1978-33c-0156_n
	Volume	33

4	Author	Horst Hertel	Requires cookie*
	Title	Phototaktische Reaktion von Asplanchna priodonta bei monochromatischem Reizlicht Phototactic Reactions of Asplanchna priodonta to Monochromatic Light
	Abstract	1. The spectral sensitivity curve of the positive phototactic reaction of the rotifer Asplanchna priodon ta has a triple peak. The maxima lie at 363 nm, 453 nm and 552 nm. 2. In the shortest wavelength tested and in the area of 453 to 594 nm was the precision of the phototactic orientation found to be high. In between lies a minimum at 395 nm, above 594 nm occurs a rapid decrease in phototactic orientation. 3. No wavelength specific differences in the way of orientation were found when using dif ferent monochromatic test light stimuli. This leads the same mixture of photopigments.
	Reference	Z. Naturforsch. 34c, 148 (1979); eingegangen am 16. August/20. Oktober 1978
	Published	1979
	Keywords	Rotifer, Phototactic Reaction, Spectral Sensitivity, Swimming Track and Speed
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	TEI-XML for	default:Reihe_C/34/ZNC-1979-34c-0148.pdf
	Identifier	ZNC-1979-34c-0148
	Volume	34