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1990 (1)
1976 (1)
1Author    H. Stieve, M. HananiRequires cookie*
 Title    Light and D ark Adaptation of Crayfish Visual Cells Depending on Extracellular Calcium Concentration  
 Abstract    Lowering of extracellular Ca2+-concentration from 14 x 10-3 M to ca. 10~ 6 M (using 1 mM ethyleneglycol bis (/?-aminoethylether) -N,N'-tetraacetic acid (E G T A)) results in weaker light adap­ tation by a 2 s light exposure and faster dark adaptation (half time 45 + 1%) of crayfish visual cells. 
  Reference    (Z. Naturforsch. 31c, 324 [1976]; received February 2 1976) 
  Published    1976 
  Keywords    Calcium, Adaptation, Photoreceptor Cells, Crustacea 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0324.pdf 
 Identifier    ZNC-1976-31c-0324 
 Volume    31 
2Author    EricJ W Arrant, RobertB. PinterRequires cookie*
 Title      
 Abstract    Intracellular recordings o f angular sensitivity from the photoreceptors o f Aeschnid dragonflies (Hemianax papuensis and Aeschna brevistyla) are used to determine the magnitude and time course o f acuity changes follow ­ ing alterations o f the state o f light or dark adaptation. Acuity is defined on the basis o f the acceptance angle, A q (the half-width o f the angular-sensitivity function). The maximally light-adapted value o f A q is half the dark-adapted value, indicating greater acuity during light adaptation. Following a change from light to dark adaptation, A q increases slowly, requiring at least 3 min to reach its dark-adapted value. In contrast, the reverse change (dark to light) induces a rapid reduction o f A q , and at maximal adapting luminances, this reduction takes place in less than 1 0 sec. 
  Reference    Z. Naturforsch. 45c, 137—141 (1990); received September 14 1989 
  Published    1990 
  Keywords    Compound Eye, Adaptation, Photoreceptors, Spatial Acuity, Dragonfly 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0137_n.pdf 
 Identifier    ZNC-1990-45c-0137_n 
 Volume    45