Denis Shcherbakov

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Leftward flow of extracellular fluid breaks the bilateral symmetry of most vertebrate embryos, manifested by the ensuing asymmetric induction of Nodal signaling in the left lateral plate mesoderm (LPM). Flow is generated by rotational beating of polarized monocilia at the posterior notochord (PNC; mammals), Kupffer's vesicle (KV; teleost fish) and the(More)
Symsagittifera roscoffensis is a plathelminth living in symbiosis with the green algae Tetraselmis convolutae. Host and symbiont are a model system for the study of endosymbiosis, which has so far mainly focused on their biochemical interactions. Symsagittifera roscoffensis is well known for its positive phototaxis that is hypothesized to optimize the(More)
Many species, from bacteria to vertebrates, have been reported to use the geomagnetic field as a major cue for oriented short and long range migration [1–10], but the molecular nature of the underlying receptor has remained elusive. One of the main reasons may be that past attempts to train animals to respond to magnetic stimuli proved surprisingly(More)
Near-infrared (NIR) light constitutes an integrated part of solar radiation. The principal ability to sense NIR under laboratory conditions has previously been demonstrated in fish. The availability of NIR in aquatic habitats, and thus its potential use as a cue for distinct behaviors such as orientation and detection of prey, however, depends on physical(More)
The aim of this study was to analyze the time course of the behavioral adaptation to diminished gravity aboard a texus sounding rockrt in correlation with the calcification status of inner ear otoliths. Experimental animals were fish-larvae (Oreochromis mossambicus). The adaptation to the two applied levels of low gravity between 10 -4 g (platform zero-g of(More)
Light plays a pivotal role in animal orientation. Aquatic animals face the problem that penetration of light in water is restricted through high attenuation which limits the use of visual cues. In pure water, blue and green light penetrates considerably deeper than red and infrared spectral components. Submicroscopic particles and coloured dissolved organic(More)
It is testified that the intensity of lipid peroxidation (LP) in the brain of old and mature rats did not differ significantly. Stress-effects in the form of immobilization led to activation of the LP and inhibition of antioxidant activity (AOA) in the brain mainly in aged rats. The simultaneous introduction of tryptophan and nicotinic acid reduced negative(More)
We performed a quantitative assessment of the conidia yield in Neurospora crassa in response to treatment with different conidiation effectors. Depending on nitrogen source and intactness of nitrite reducetase (NiR) and nitrate reductase (NR), light and dehydration affected the number of viable conidia produced by the ascomycete. In most variants of the(More)
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