956 resultados para brown widow


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This paper focuses on the ethnic dimension of xenophobia, as understood as aversion, fear or hostility vis-a-vis members of other nationalities, as well as the related radical nationalist ideas founded on the concept of the dominant (and often discriminatory) role of the Russians in the Russian Federation, with reference to racism or neo-Nazism. This text primarily presents xenophobia as an enormous social problem in today's Russia, which is not being addressed at the moment, but is instead being exploited by both the authorities and radical nationalist groups. This paper attempts to describe and understand the causes of xenophobia and the reasons for the popularity of extremely nationalist views among ethnic Russians. It also seeks to estimate the scale of the problem and the potential threat it may create in the future. The first part describes the different manifestations of xenophobia in present-day Russia. It identifies the groups most exposed to ethnically motivated violence and persecution, as well as the most xenophobic communities, and discusses the scale of the problem and its specific characteristics in the context of Russian reality. The second part looks into the underlying causes of xenophobic sentiments among Russians, while the last chapters delve into the authorities' attitude towards the problem and seek to answer the question of whether radical nationalist ideas may in future come to dominate Russia's political scene.

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A method was developed to extract adenine nucleotides AMP, ADP, and ATP from marine macroalgal tissue to gain information on the cellular energy charge. Quantification was carried out by high performance liquid chromatography (HPLC). Three species from the rocky shore of the island of Helgoland (German Bight) were examined: Laminaria saccharina (Phaeophyta), Chondrus crispus (Rhodophyta), and Ulva lactuca (Chlorophyta). In L. saccharina and C. crispus, the adenylate energy charge (AEC) was determined in different thallus regions. AEC varied in relation to tissue age and function. Higher AEC values typically occurred in thallus regions with meristematic activity. Furthermore, L. saccharina and U. lactuca were exposed to UV-A and elevated UV-B radiation. The AEC was calculated and the maximal quantum yield of photosystem II (Fv/Fm) was determined as indicators for UV stress. In both species, the AEC remained at high values (0.72 ± 0.04), while Fv/Fm dropped rapidly. The results show that the photosynthesis of the phaeophyte is more resistant to UV radiation than the chlorophyte.

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Oriented with north to the upper left; sheet 42 x 51 cm.