Comparative analysis of polyphenol contents in green tea infusions extracted by conventional and modern extraction techniques and optimization of the ultrasonic-assisted extraction parameters by response surface methodology

Shahid Ullah Khan, Shahid Ullah Khan, Safir Ullah Khan, Safir Ullah Khan, Mohammed Alissa, Hina Kamreen, Wasim Ullah Khan, Wasim Ullah Khan, Suad A. Alghamdi, Eman A.Al-Shahari, Ghadah Shukri Albakri, Amr S. Abouzied, Dilfaraz Khan, Dilfaraz Khan