Ratna Dewi Kusumaningtyas, - (2022) Biodiesel Production from Used Cooking Oil Using Integrated Double Column Reactive Distillation: Simulation Study. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 94 (1). pp. 152-162. ISSN ISSN (e) : 2289-7879

IDS000004552 (2022) ALAT PENGOLAH BIODIESEL MULTI KAPASITAS. IDS000004552.

IDS000004358 (2021) ALAT PIROLISIS BERBANTU GELOMBANG MIKRO UNTUK PEMBUATAN ARANG HAYATI. IDS000004358.

Ratna Dewi Kusumaningtyas, - (2021) Vinasse-Based Slow-Release Organo-Mineral Fertilizer with Chitosan-Bentonite Matrix. Jurnal Bahan Alam Terbarukan, 10 (1). pp. 1-8. ISSN ISSN : (p) 2303-0623, ISSN : (e) 2407-2370

Ratna Dewi Kusumaningtyas, - and Dwi Widjanarko, - (2020) Effect of Ceiba pentandra Biodiesel/Dexlite Diesel Blends on the Four-Stroke Diesel Engine Performances. IOP Conference Series: Materials Science and Engineering 2021, 1096. pp. 1-6. ISSN ISSN (P): 1757-8981 ISSN (e): 1757-899X

IDS000003300 (2020) TELUR ASIN YANG DIPERKAYA DENGAN OMEGA-3 DARI TANAMAN KROKOT. IDS000003300.

Ratna Dewi Kusumaningtyas, - and Dwi Widjanarko, - and Haifah, - and H Prasetiawan, - (2020) Experimental and kinetic study of free fatty acid esterification derived from Ceiba pentandra seed oil with ethanol. Journal of Physics: Conference Series 2021, 1918 (3). pp. 1-6. ISSN ISSN (P): 1742-6588 ISSN (e): 1742-6596 ISBN : 978-0-7354-1971-1

Ratna Dewi Kusumaningtyas, - (2020) Continuous and integrated model of learning media and evaluation for vocational education application: A case in automotive biodiesel learning materials. Journal of Physics: Conference, 1456. pp. 1-9. ISSN ISSN (P): 1742-6588 ISSN (e): 1742-6596

Ratna Dewi Kusumaningtyas, - (2020) METHYLENE BLUE REMOVAL USING COCONUT SHELL BIOCHAR SYNTHESIZED THROUGH MICROWAVE-ASSISTED PYROLYSIS. Jurnal Teknologi, 8 (2). pp. 59-64. ISSN ISSN (e) : 2180–3722

Ratna Dewi Kusumaningtyas, - (2020) Phenolic compound derived from microwave- assisted pyrolysis of coconut shell: Isolation and antibacterial activity testing. E3S Web of Conferences 2020, 202. pp. 1-9. ISSN ISSN (e): 2267-1242

Ratna Dewi Kusumaningtyas, - (2020) CONVERSION OF DURIAN SHELL AGROINDUSTRIAL WASTE INTO VARIOUS VALUABLE PRODUCTS TO SUPPORT THE FOOD SECURITY DURING THE COVID-19 NEW NORMAL ERA: REVIEW. Jurnal Teknologi Hasil Pertanian, 13 (2). pp. 124-129. ISSN ISSN : (p) 2614-7920, ISSN : (e) 1979-0309

Megawati, FT Teknik Kimia and Rizqy Romadhona Ginting, - and Ratna Dewi Kusumaningtyas, - and Wahyudi Budi Sediawan, - (2020) Mangosteen Peel Antioxidant Extraction and Its Use to Improve the Stability of Biodiesel B20 Oxidation. In: Valorisation of Agro-industrial Residues. Springer Nature Switzerland AG, pp. 29-61. ISBN 978-3-030-39207-9

Ratna Dewi Kusumaningtyas, - (2019) Reduction of FFA in Kapok Randu (Ceiba pentandra) Seed Oil via Esterification Reaction Using Sulfuric Acid Catalyst: Experimental and Kinetics Study. Jurnal Bahan Alam Terbarukan, 8 (2). pp. 156-166. ISSN ISSN : (p) 2303-0623, ISSN : (e) 2407-2370

IDS000004494 (2019) Metode Pembuatan Bahan Bakar Pelet Biomassa dari Limbah Eceng Gondok. IDS000004494.

Ratna Dewi Kusumaningtyas, - (2019) The Extraction of Purslane (Portulaca Oleracea L.) Using Alcohol Solvents 48 % and its Utilization as a Source of Encapsulated Omega-3 Oil. AIP Conference Proceedings, 2197 (1). pp. 1-5. ISSN ISSN (P): 0094-243X ISSN (e): 1551-7616 ISBN: 978-0-7354-1948-3

Ratna Dewi Kusumaningtyas, - and Dwi Widjanarko, - (2019) Synthesis of Biodiesel from Kapok (Ceiba pentandra L.) Seed Oil through Ultrasound-Enhanced Transesterification Reaction. AIP Conference Proceedings 2020, 2217 (1). pp. 1-9. ISSN ISSN (P): ‎0094-243X ISSN (e): 1551-7616 ISBN : 978-0-7354-1971-1

Ratna Dewi Kusumaningtyas, - (2019) Simplex Lattice Design Method for the Optimization of Non-Edible Oils Mixture Composition as Feedstock for Biodiesel Synthesis Using Reactive Distillation. Journal of Physics: Conference, 1295. pp. 1-9. ISSN ISSN (P): 1742-6588 ISSN (e): 1742-6596

Ratna Dewi Kusumaningtyas, - (2019) Mechanical Properties of PP/Clay Nanocomposites Prepared from Masterbatch: Effect of Nanoclay Loadings and Re-Processing. Key Engineering Material, 805. pp. 59-64. ISSN ISSN (p) : 1013-9826 ISSN (e) : 1662-9795

Ratna Dewi Kusumaningtyas, - (2018) Esterification of Non-edible Oil Mixture in Reactive Distillation Column over Solid Acid Catalyst: Experimental and Simulation Study. Journal of Physical Science, 29 (2). pp. 215-226. ISSN ISSN (p) : 1675-3402 ISSN (e) : 2180-4230

Ratna Dewi Kusumaningtyas, - (2018) PREPARATION AND CHARACTERIZATION OF EDIBLE FILM FROM SORGHUM STARCH WITH GLYCEROL AND SORBITOL AS PLASTICIZERS. Journal of Engineering Science and Technology, 13. ISSN ISSN : 1823-4690

Ratna Dewi Kusumaningtyas, - (2017) Conversion of Ligno-cellulosic Biomass Waste into Cellulose Nano-Fibril (CNF) Biodegradable Film for Bioactive Food Packaging. Seminar Nasional Teknik Kimia “Kejuangan’’ 2017. pp. 1-6. ISSN ISBN : 1693-4393

Ratna Dewi Kusumaningtyas, - (2017) Kinetics Study of Jatropha Oil Esterification with Ethanol in the Presence of Tin (II) Chloride Catalyst for Biodiesel Production. AIP Conference Proceedings, 1788 (1). pp. 1-7. ISSN ISSN (P): 0094-243X ISSN (e): 1551-7616 ISBN: 978-0-7354-1452-5

Ratna Dewi Kusumaningtyas, - (2016) INTEGRATING RENEWABLE ENERGY EDUCATION IN JUNIOR AND SENIOR HIGH SCHOOLS’ CURRICULUM IN INDONESIA. Konvensi Nasional Pendidikan donesia (KONASPI) VIII Tahun 2016. pp. 1856-1862. ISSN ISBN : 978-602-60240-0-8

Ratna Dewi Kusumaningtyas, - (2016) Application of Tin(II) Chloride Catalyst for High FFA Jatropha Oil Esterification in Continuous Reactive Distillation Column. Bulletin of Chemical Reaction Engineering & Catalysis, 11 (1). pp. 66-74. ISSN ISSN (e) : 1978-2993

Ratna Dewi Kusumaningtyas, - (2015) PEMBUATAN PUPUK ORGANO-MINERAL FERTILIZER (OMF) PADAT DARI LIMBAH INDUSTRI BIOETANOL (VINASSE). Jurnal Bahan Alam Terbarukan, 4 (2). pp. 46-54. ISSN ISSN : (p) 2303-0623, ISSN : (e) 2407-2370

Ratna Dewi Kusumaningtyas, - (2015) Pembuatan Pupuk Organik Cair (POC) dari Limbah Industri Bioetanol (Vinasse) Melalui Proses Fermentasi Berbantuan Promoting Microbes. Seminar Nasional Kimia dan Pendidikan Kimia (SNKPK) 2015. pp. 82-87. ISSN ISBN : 978-602-14397-1-5

Ratna Dewi Kusumaningtyas, - (2014) Graphical exergy analysis of reactive distillation column for biodiesel production. International Journal of Exergy, 15 (4). pp. 447-467. ISSN ISSN (p) : 1742-8297 ISSN (e) : 1742-8300

Ratna Dewi Kusumaningtyas, - (2014) Tin (II) Chloride Catalyzed Esterification of High FFA Jatropha Oil: Experimental and Kinetics Study. International Journal of Renewable Energy Development, 3 (2). pp. 75-81. ISSN ISSN (p) : 2252-4940 ISSN (e) : 2716-4519

Ratna Dewi Kusumaningtyas, - and Haniif Prasetiawan, - and Radenrara Dewi Artanti Putri, - and Bayu Triwibowo, - Optimisation of Free Fatty Acid Removal in Nyamplung Seed Oil (Callophyllum inophyllum L.) using Response Surface Methodology Analysis. SCIENCE & TECHNOLOGY. ISSN ISSN: 0128-7680 e-ISSN: 2231-8526

Ratna Dewi Kusumaningtyas, - Reactive distillation in the intensification of oleic acid esterification with methanol – A simulation case-study. Journal of Industrial and Engineering Chemistry, 20 (6). pp. 4242-4249. ISSN ISSN: 1226-086X