In this work, the photocatalytic activity of layered GaSe flakes obtained by liquid-phase exfoliation of bulk crystals was tested on the photodegradation of an organic dye under UV irradiation. The initial bulk GaSe crystals were synthesized by stoichiometric fusion method. Investigation of the structure and composition showed that as-grown crystal corresponds to β-polytype of GaSe. Analysis of the kinetics of the decomposition MB molecules showed that the obtained flakes demonstrate good photocatalytic activity in the UV range. The efficiency of the dye photodegradation was 86% within 3 hours under UV irradiation.

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Primorsky Krai is a region unique in its biological diversity. However, the state of the forest fund of the region over the past 70 years has significantly changed because of unsystematic logging and forest fires. There is a special attitude towards forest restoration in the region. First of all, there is an opinion that artificial forest regeneration in Primorye is not effectually, because of the natural conditions witch allow the forest to grow well itself. The prevalence of naturally regenerated stands in the areas of the state forest fund is a result. However, the reforesting reserves in the region attends significant areas, agro technical care is required in large quantities, mono breed reforestation can not be used everywhere and natural regeneration by economically valuable species is possible after a long period of forest cultivation. To analyse what has been done and planned for the future we can by studying the forest plan of the subject and reports on its implementation, which we tried to do in this work.