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انجمن علمی دانشجویی شیمی دانشگاه شیراز | Telegram Webview: SACS_ShirazUni/760 -
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در روش تیتراسیون کمپلکسومتری با استفاده از EDTA، برای تعیین غلظت یون‌های Ca²⁺، از معرف ارئیوکروم بلک T استفاده می‌شود. نقش این معرف چیست؟
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ایجاد کمپلکس پایدار با یون کلسیم
تغییر رنگ در نقطه پایان تیتراسیون
افزایش سرعت واکنش بین EDTA و یون فلزی
ته‌نشین کردن یون‌های فلزی اضافی
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On Telegram’s website, it says that Pavel Durov “supports Telegram financially and ideologically while Nikolai (Duvov)’s input is technological.” Currently, the Telegram team is based in Dubai, having moved around from Berlin, London and Singapore after departing Russia. Meanwhile, the company which owns Telegram is registered in the British Virgin Islands. In December 2021, Sebi officials had conducted a search and seizure operation at the premises of certain persons carrying out similar manipulative activities through Telegram channels. He adds: "Telegram has become my primary news source." Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin. Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government.
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