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آماده سازی محلول لاکتوفنول کاتن بلو
آماده سازی محلول لاکتوفنول کاتن بلو معمولا طی دو روز انجام می‌شود. این فرایند شامل پنج مرحله مهم زیر است:
 در روز اول، کاتن بلو را با آب مقطر مخلوط کرده و اجازه دهید یک شب در دمای اتاق بماند.
روز دوم، بلورهای فنل را به کمک هات پلیت در اسید لاکتیک حل کنید تا فنل حل شود.
گلیسرول را به مخلوط فنل و اسید لاکتیک اضافه کنید و مطمئن شوید که کاملا حل شده است.
محلول کاتن بلو و آب مقطر را به ترکیب فنل، گلیسرول و اسید لاکتیک اضافه کرده و محلول نهایی را فیلتر کنید.
پس از آماده‌سازی محلول نهایی، آن را در دمای اتاق نگهداری کنید. توجه داشته باشید که دور از نور مستقیم قرار گیرد. در این شرایط، ماندگاری آن از تاریخ آماده‌سازی، ۵۲ هفته خواهد بود.

Lab_science
Lab_science
کدام یک از گزینه های زیر در رابطه با ترکیبات لاکتوفنل کاتن بلو صحیح است؟
آماده سازی محلول لاکتوفنول کاتن بلو
آماده سازی محلول لاکتوفنول کاتن بلو معمولا طی دو روز انجام می‌شود. این فرایند شامل پنج مرحله مهم زیر است:
 در روز اول، کاتن بلو را با آب مقطر مخلوط کرده و اجازه دهید یک شب در دمای اتاق بماند.
روز دوم، بلورهای فنل را به کمک هات پلیت در اسید لاکتیک حل کنید تا فنل حل شود.
گلیسرول را به مخلوط فنل و اسید لاکتیک اضافه کنید و مطمئن شوید که کاملا حل شده است.
محلول کاتن بلو و آب مقطر را به ترکیب فنل، گلیسرول و اسید لاکتیک اضافه کرده و محلول نهایی را فیلتر کنید.
پس از آماده‌سازی محلول نهایی، آن را در دمای اتاق نگهداری کنید. توجه داشته باشید که دور از نور مستقیم قرار گیرد. در این شرایط، ماندگاری آن از تاریخ آماده‌سازی، ۵۲ هفته خواهد بود.
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Telegram hopes to raise $1bn with a convertible bond private placement

The super secure UAE-based Telegram messenger service, developed by Russian-born software icon Pavel Durov, is looking to raise $1bn through a bond placement to a limited number of investors from Russia, Europe, Asia and the Middle East, the Kommersant daily reported citing unnamed sources on February 18, 2021.The issue reportedly comprises exchange bonds that could be converted into equity in the messaging service that is currently 100% owned by Durov and his brother Nikolai.Kommersant reports that the price of the conversion would be at a 10% discount to a potential IPO should it happen within five years.The minimum bond placement is said to be set at $50mn, but could be lowered to $10mn. Five-year bonds could carry an annual coupon of 7-8%.

آماده سازی محلول لاکتوفنول کاتن بلو

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