Riyadi, T.W.B. and Spraggon, M. and Herawan, S.G. and Idris, M. and Paristiawan, P.A. and Putra, N.R. and R, M.F. and Silambarasan, R. and Veza, I. (2023) Biodiesel for HCCI engine: Prospects and challenges of sustainability biodiesel for energy transition. Results in Engineering, 17. ISSN 25901230

Rizkiyah, D.N. and Putra, N.R. and Yunus, M.A.C. and Veza, I. and Irianto, I. and Aziz, A.H.A. and Rahayuningsih, S. and Yuniarti, E. and Ikhwani, I. (2023) Insight into Green Extraction for Roselle as a Source of Natural Red Pigments: A Review. Molecules, 28 (3).

Rizkiyah, D.N. and Putra, N.R. and Idham, Z. and Aziz, A.H.A. and Che Yunus, M.A. and Veza, I. and Irianto and Chinedu Mamah, S. and Qomariyah, L. (2023) Recovery of Anthocyanins from Hibiscus sabdariffa L. Using a Combination of Supercritical Carbon Dioxide Extraction and Subcritical Water Extraction. Processes, 11 (3).

Putra, N.R. and Rizkiyah, D.N. and Abdul Aziz, A.H. and Che Yunus, M.A. and Veza, I. and Harny, I. and Tirta, A. (2023) Waste to Wealth of Apple Pomace Valorization by Past and Current Extraction Processes: A Review. Sustainability (Switzerland), 15 (1).

Veza, I. and Irianto and Panchal, H. and Paristiawan, P.A. and Idris, M. and Fattah, I.M.R. and Putra, N.R. and Silambarasan, R. (2022) Improved prediction accuracy of biomass heating value using proximate analysis with various ANN training algorithms. Results in Engineering, 16. ISSN 25901230

Rizkiyah, D.N. and Putra, N.R. and Idham, Z. and Che Yunus, M.A. and Veza, I. and Harny, I. and Syahlani, N. and Abdul Aziz, A.H. (2022) Optimization of Red Pigment Anthocyanin Recovery from Hibiscus sabdariffa by Subcritical Water Extraction. Processes, 10 (12). ISSN 22279717

Idham, Z. and Putra, N.R. and Idrus, N.F.M. and Mili, N. and Ruslan, M.S.H. and Rasidek, N.A.M. and Yunus, M.A.C. (2021) Characteristics and Empirical Modelling of Extract from Hibiscus sabdariffa Using Supercritical CO2 Extraction with Ethanol-Water as Modifier. Lecture Notes in Mechanical Engineering. pp. 375-388. ISSN 21954356

Redzuan, S. and Ho, C.Y. and Idham, Z. and Yusuf, S. and Putra, N.R. and Yunus, M.A.C. and Mansor, S. and Ruslan, M.S.H. (2021) Optimization of Anthocyanins Extracts from Roselle (Hibiscus sabdarifa) Petals Using Ultrasonic-Assisted Extraction Method. Lecture Notes in Mechanical Engineering. pp. 295-309. ISSN 21954356

Mohd-Nasir, H. and Putra, N.R. and Chuo, S.C. and Daud, N.M. and Hartati, H. and Bakeri, N. and Ruslan, M.S.H. and Mohd-Setapar, S.H. and Ahmad, A. and Md Salleh, L. (2021) Optimization of the supercritical carbon dioxide extraction of Quercus infectoria galls extracts and its bioactivities. Journal of Food Processing and Preservation, 45 (2). ISSN 01458892

Putra, N.R. and Yunus, M.A.C. and Ruslan, M.S.H. and Idham, Z. and Idrus, F.N. (2018) Comparison extraction of peanut skin between CO2 supercritical fluid extraction and soxhlet extraction in term of oil yield and catechin. Pertanika Journal of Science and Technology, 26 (2). pp. 799-810. ISSN 01287680

Putra, N.R. and Rizkiyah, D.N. and Zaini, A.S. and Yunus, M.A.C. and Machmudah, S. and Idham, Z.B. and Hazwan Ruslan, M.S. (2018) Effect of particle size on yield extract and antioxidant activity of peanut skin using modified supercritical carbon dioxide and soxhlet extraction. Journal of Food Processing and Preservation, 42 (8). ISSN 01458892

Putra, N.R. and Idham, Z.B. and Machmudah, S. and Ruslan, M.S.H.B. and Che Yunus, M.A. (2018) Extraction of peanut skin oil by modified supercritical carbon dioxide: Empirical modelling and optimization. Separation Science and Technology (Philadelphia), 53 (17). pp. 2695-2703. ISSN 01496395