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Date: 14-11-2019
1058
Date: 31-10-2019
1025
Date: 6-9-2019
736
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The electrophile in an enzymatic SEAr reaction is usually a carbocation. One example of an SEAr reaction can be found in the biosynthesis of vitamin K. In this reaction, an isoprenoid chain is transferred to a phenol ring as part of the and related biomolecules. In this example, carbocation intermediate B is stabilized by resonance with the electron-donating phenol oxygen.
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"عادة ليلية" قد تكون المفتاح للوقاية من الخرف
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ممتص الصدمات: طريقة عمله وأهميته وأبرز علامات تلفه
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المجمع العلمي للقرآن الكريم يقيم جلسة حوارية لطلبة جامعة الكوفة
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