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In areas of high natural beauty and landscape values the main problem is to maintain a balance between the protection and sharing. Over-activation of tourism and holiday traffic may lead to the irreversible degradation of the landscape or the destruction of its most important components that determine the attractiveness of the place. In this regard, reasonable, balanced Policy and practice of spatial...
В исследованиях, проведенных в период 42 дней на 32 молодых гусаках, разделенных по жребию на 8 групп, скармливали концентрированные смеси со стандартным содержанием вит. А (10 000 м.е.) и растущего количества каротинов от 12 до 49 мг/кг (группы I—IV), а также препарата Polfasol AD₃, соответствующего количеству витамина А от 6000 на 18 000 м.е./кг (группы Va—Vc). Применение этих смесей вызвало непропорциональные...
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