تحديد الثبات الكيميائي لدواء الميتفورمين المستخدم لعلاج داء السكري باستخدام طريقتي الأشعة فوق البنفسجية والمرئية ومطيافية تحويل فورييه بالأشعة تحت الحمراء

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