Wolbachia sp. wDs
National Institutes of Health
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Mild traumatic brain injury (mTBI) remains the most commonly reported head injury in the United States, and is associated with a…
Ââåäåíèå Áîëüøèíñòâî ïðèðîäíûõ ìèíåðàëîâ áëàãîðîäíûõ ìåòàëëîâ ââèäó èõ íåáîëüøèõ ðàçìåðîâ è ðåäêîãî ðàñïðîñòðàíåíèÿ äîâîëüíî ñëîæíî äèàãíîñòèðîâàòü. Íàèáîëåå ïîäõîäÿùèì è øèðîêî èñïîëüçóåìûì ñïîñîáîì èõ èäåíòèôèêàöèè ÿâëÿåòñÿ ìåòîä âûñîêîðàçðåøàþùåé ìèêðîñêîïèè, êîòîðûé ïîçâîëÿåò ïîëó÷àòü êà÷åñòâåííûå EDS-, WDS-õàðàêòåðèñòèêè ìèíåðàëîâ, íåñìîòðÿ íà èõ íåáîëüøèå ðàçìåðû. Ãëàâíûì ìèíóñîì òàêîãî ìåòîäà ÿâëÿåòñÿ òî, ÷òî åñëè ìèíåðàë èìååò ðàçìåðû ìåíüøå äèàìåòðà ïó÷êà çîíäà, òî ïîëó÷èòü êîððåêòíûé õèìè÷åñêèé ñîñòàâ äîâîëüíî ñëîæíî, ââèäó òîãî ÷òî çàõâàòûâàåòñÿ îêðóæàþùàÿ ìèíåðàë îáëàñòü. Íåñìîòðÿ íà òî, ÷òî â íàñòîÿùåå âðåìÿ ñóùåñòâóþò ñêàíèðóþùèå ýëåêòðîííûå ìèêðîñêîïû ñ âîçìîæíîñòüþ äèàãíîñòèêè íàíîðàçìåðíûõ ìèíåðàëüíûõ ôàç, äî ñèõ ïîð ãëàâíîé ïðîáëåìîé ïðè èçó÷åíèè õèìè÷åñêîãî ñîñòàâà ìèíåðàëîâ îñòàåòñÿ îïðåäåëåíèå èõ ñòðóêòóðíîé ðàçíîâèäíîñòè, à òàêæå íåîáõîäèìîñòü ïîäòâåðæäåíèÿ ïîëèìîðôíîé ìîäèôèêàöèè, íàïðèìåð ñ ïîìîùüþ ðåíòãåíîñòðóêòóðíîãî àíàëèçà (ÐÑÀ). Ïðè ýòîì äëÿ ìåòîäà ÐÑÀ íåîáõîäèì îáúåì àíàëèçèðóåìîãî ìàòåðèàëà, ðàâíûé 100 ìì3, ÷òî íå ïîäõîäèò â ñëó÷àÿõ, êîãäà îòáîð íóæíîãî êîëè÷åñòâà âåùåñòâà íåâîçìîæåí.  ñëó÷àå èñïîëüçîâàíèÿ ôîòîìåòîäà òðåáóåòñÿ íåçíà÷èòåëüíûé îáúåì ìàòåðèàëà (1 ìì3 è ìåíüÓÄÊ 553.08(234.82)
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