примесь

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22.12.2011 (9:35) Технология >> Нанотехнология
Границы отдельных монокристаллов в поликристалле отличаются высокой концентрацией металлических примесей
В своей последней работе по изучению наноструктур ученые из США обнаружили, что примеси, поступающие из катализаторов, использующихся при обработке материалов, в основном концентрируются на границах монокристаллов в поликристаллических структурах. Открытие поможет в ...>>

21.05.2008 (23:28) Общество >> Экология
Как пустынная пыль подкармливает Мировой океан
Ученые изучают изменения климата по образцам пыли и металлических микроэлементов в морской воде В середине февраля в разгаре южного лета ...>>


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