Green and Colourless Hydra
نویسندگان
چکیده
منابع مشابه
Growth of endosymbiotic algae in the green hydra, Hydra viridissima
Stable endosymbiosis depends upon balanced growth of the symbionts. In green hydra, coincident patterns of host and algal mitotic index suggest that coordinated reproduction provides for balanced growth. However, when hydra shrink during food shortage, the population of endosymbiotic algae in a green hydra must likewise decline in size. Thus far, no mechanism of reducing the size of the endosym...
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Individuals of green (sort S1J-J1) and brown (sort S1M-K1) hydra were treated with five concentrations of aqueous solution of norflurazon (2x10-4, 2x10-5, 2x10-6, 2x10-7 and 2x10-8 mol/L; SAN 9789, Sandoz, Switzerland) in the laboratory conditions (21o C, photoperiod 10 hs daylight and 14 hs dark) in subacute exposure for 21 days. They were compared to the control groups of organisms. For morph...
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For the first time effects of norflurazon on green (Hydra viridissima Pallas, 1766) and brown hydra (Hydra oligactis Pallas, 1766) in high- and low-light conditions were investigated in order to establish the extent of damage that this substance inflicts, with special emphasis on the "bleaching effect" and the effect on hydra-algae symbiosis. Green hydra is a typical example of an endosymbiotic...
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1979. Effects of food quality on growth of a stream detritivore, Paratendipes albimanus (Meigen) (Diptera: Chi-ronomidae). Ecology 60: 57-64. Abstract-Symbiotic Chlorella isolated from green hydra by simple techniques of homogeni-zation and centrifugation have been found to be contaminated with comparatively large amounts of animal debris. Additional washing with sodium dodecyl sulfate (SDS) re...
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Synaesthesia is an unusual phenomenon, in which additional sensory perceptions are triggered by apparently unrelated sensory or conceptual stimuli. The main foci of this presentation lie in vowel sound colour and voice-induced synaesthesia. While grapheme-colour synaesthesia has been intensively researched using various methodologies (neurological studies, extensive interviews, and behavioural ...
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ژورنال
عنوان ژورنال: Nature
سال: 1923
ISSN: 0028-0836,1476-4687
DOI: 10.1038/111601a0