Reusability of lactic acid on hydrolysis of nanocrystalline cellulose from pepper waste (piper nigrum L.) oleh Holilah Holilah, Lisman Suryanegara, Hasliza Bahruji, Zuratul Ain Abdul Hamid, Muhammad Sapto Wahyudi, Nanang Masruchin, Asranudin Asranudin, RH. Fitri Faradilla, Edi Syafri, Alvina Tata Melenia, Stella Jovita, Reva Edra Nugraha, Didik Prasetyoko