Article

Sugiharto, R. and Murhadi, Murhadi and Situmeang, Rudy T.M and subeki, subeki and Hasanudin, Udin (2024) Study of the Utilization of Spent Bleaching Earth as a Raw Material for the Production of Biodiesel Using the In-Situ Transesterification Process. Journal of Energy Technologies and Policy, 14 (1). pp. 10-23.

Sembiring, Simon and Riyanto, Agus and Firdaus, Iqbal and Junaidi, Junaidi and Situmeang, Rudy T.M (2022) STRUCTURE AND PROPERTIES OF SILVER-SILICA COMPOSITE PREPARED FROM RICE HUSK SILICA AND SILVER NITRATE. Ceramics-Silik�ty, 66 (2). pp. 167-177. ISSN 1804-5847

sembiring, simon and Riyanto, Agus and Firdaus, Iqbal and Junaidi, Junaidi and Situmeang, Rudy T.M and Ningtias, Endah Ayu (2021) STRUCTURAL CHARACTERISATION OF ASPHALT-RICE HUSK SILICA COMPOSITES. Ceramics-Silik�ty, 65 (3). pp. 215-223. ISSN 1804-5847

Erianti, Mahliani and Situmeang, Rudy T.M and Sembiring, Simon (2021) Preparation and Characterization of LaCr0.99Fe0.01O3 Nanomaterial. Journal of Physics: Conference Series 1751, 1751. pp. 1-11. ISSN 1742-6596

Situmeang, Rudy T.M and Saputra, Ahmad Ammar and Andayani, Yarti and Imanudin, M. Ilhan and Sembiring, Simon (2021) The effect of Vanadium dopant on Bandgap Energy of Ni1-xVxFe2O4 nanospinel. Journal of Physics: Conference Series, 1751. pp. 1-7. ISSN 1742-6596

Suciyati, SW and Manurung, Posman and Sembiring, Simon and Situmeang, Rudy T.M (2021) Comparative study of Cladophora sp. cellulose by using FTIR and XRD. IOP Journal of Physics : Conference Series, 1751 (-). 012075-012075. ISSN 1742-6596

Sembiring, Simon and Riyanto, Agus and Situmeang, Rudy T.M and Sembiring, Zipora and Susanti, Nita and Firdaus, Iqbal (2020) Effect of amorphous rice husk silica addition on the structure of asphalt composite. Journal of Metals, Materials and Minerals, 30 (4). pp. 113-118. ISSN 08576149

Manurung, Posman and Situmeang, Rudy T.M and Sinuhaji, Perdinan and Sembiring, Simon (2020) Effect of Sulfur Doped Nanotitania for Degradation of Remazol Yellow and Phenol. Asian Journal of Chemistry, 32 (12). pp. 3019-3023. ISSN ISSN: 0975-427X (Online)

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Sembiring, Zipora and Situmeang, Rudy T.M (2020) Effect of sintering temperature on the structural and physical properties of forsterite using amorphous rice husk silica as refractory precursors. Journal of the Australian Ceramic Society, 56 (2). pp. 433-440. ISSN 2510-1560

Situmeang, Rudy T.M and Romiyati, Romiyati and Saputra, Ahmadammar and Sembiring, Simon (2020) Ni0.5V0.5Fe2O4 Nanophotocatalyst: Preparation, Characterization and its Activity on Remazol Golden Yellow Degradation under Sunlight Irradiation. Key Engineering Material, 840 (-). pp. 71-78. ISSN 1662-9795

Amrulloh, Hanif and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Sagala, Sophia Lasma (2020) Preparation of nano-magnesium oxide from Indonesia local seawater bittern using the electrochemical method. Inorganic and Nano-metal Chemistry.

Situmeang, Rudy T.M and Purniasari, Lia and Oktavian, Harist and Azmi, Elsina and Sembiring, Simon (2020) The effect of Vanadium Addition on the Characteristics of LaCrO3 nanomaterial. IOP Journal of Physics : Conference Series, 1428 (1). pp. 1-5. ISSN 1742-6596

Situmeang, Rudy T.M and Sembiring, Zipora and Simanjuntak, Wasinton and Dwi Yuwono, Suripto and Sembiring, Simon (2019) CHARACTERISTICS OF LaCrO3 NANOMATERIAL THE EFFECT OF THE CALCINATION TEMPERATURE. Journal of Chemical Technology and Metallurgy, 54 (4). pp. 715-720. ISSN 1314-7978

Amrulloh, Hanif and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Sagala, Sophia Lasma and Bramawanto, Rikha and Nahrowi, Ridho (2019) Effect of Dilution and Electrolysis Time on Recovery of Mg2+ As Mg(OH)2 from Bittern by Electrochemical Method. Journal of Pure and Applied Chemistry Research, 8 (1). pp. 87-95. ISSN p-ISSN:2302-4690, e-ISSN:2541-0733

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Sembiring, Zipora and Situmeang, Rudy T.M (2019) Effect of sintering temperature on the structural and physical properties of forsterite using amorphous rice husk silica as refractory precursors. Journal of the Australian Ceramic Society, 5 (2). pp. 433-440. ISSN 2510-1560

Sembiring, Simon and Situmeang, Rudy T.M (2019) Pengaruh Penambahan Silika (Sio2) Sekam Padi Terhadap Karakteristik Mikrostruktur dan Struktur Aspal dengan Perbandingan Massa 1:0 ; 1:1,5 ; 1:1,6 dan 1:1,7. Jurnal Teori dan Aplikasi Fisika, 07 (01). pp. 39-44. ISSN 2303-016X

Sembiring, Simon and Riyanto, Agus and Situmeang, Rudy T.M and Sembiring, Zipora (2019) BITUMINOUS COMPOSITE COMPRISING AMORPHOUS SILICA FROM RICE HUSKS. Ceramics – Silikáty 63, 3.

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Sembiring, Zipora and Situmeang, Rudy T.M (2019) Effect of sintering temperature on the structural and physical properties of forsterite using amorphous rice husk silica as refractory precursors. Journal of the Australian Ceramic Society. ISSN 2510-1560

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Sembiring, Zipora and Situmeang, Rudy T.M (2019) Effect of sintering temperature on the structural and physical properties of forsterite using amorphous rice husk silica as refractory precursors. Journal of the Australian Ceramic Society. ISSN 2510-1560

Situmeang, Rudy T.M and Simanjuntak, Wasinton and Sembiring, Simon and Sembiring, Zipora (2019) LaCrO nano photocatalyst: the effect of calcination temperature on its cellulose conversion activity under UV-ray irradiation 3. Advances in Natural Sciences: Nanoscience and Nanotechnology.

Situmeang, Rudy T.M and Tamba, Matthew and Erwin, Simarmata and Tria, Yuliarni and Simanjuntak, Wasinton and Sembiring, Zipora and Sembiring, Simon (2019) LaCrO3 nano photocatalyst: the effect of calcination temperature on its cellulose conversion activity under UV-Vis Irradiation. Advances in Natural Sciences: Nanoscience and Nanotechnology, 10 (1). 015009-015017. ISSN 2043-6262

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2019) Preliminary Study on Functional Groups Characteristics of Asphalt Containing Rice Husk Silica. Journal of Technomaterials Physics, 1 (1). pp. 61-66. ISSN 2656-0755

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2019) STRUCTURE AND MICROSTRUCTURE PROPERTIES OF А REFRACTORY CORDIERITE PREPARED FROM AMORPHOUS RICE HUSK SILICA RESULTING FROM PERICLACE INTRODUCTION. Simon Sembiring, Wasinton Simanjuntak, Rudy Situmeang Journal of Chemical Technology and Metallurgy, 54 (4). pp. 721-726.

Sembiring, Simon and Situmeang, Rudy T.M and Sembiring, Zipora (2019) Synthesis and characterization of asphalt composite precursors using amorphous rice husk silica. Cerâmica, 65. ISSN 0366-6913

Supryanto, R and Simanjuntak, Wasinton and Pandiangan, Kamisah Delilawati and Situmeang, Rudy T.M and Ahmadhani, Muhammad Yusri (2018) Chemical Composition of Liquid Fuel Produced by Co-pyrolysis of Sugarcane Bagasse and Sludge Palm Oil Using Zeolite-Y as Catalyst. Oriental Journal of Chemistry, 34 (3). pp. 1533-1540. ISSN 0970-020 X

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Junaidi, Junaidi (2018) STRUCTURAL AND PHYSICAL PROPERTIES OF REFRACTORY CORDIERITE PRECURSORS PREPARED FROM RICE HUSK SILICA WITH DIFFERENT MgO ADDITION. Ceramics-Silikáty, 62 (2). pp. 163-172. ISSN 1804-5847

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Junaidi, Junaidi (2018) STRUCTURAL AND PHYSICAL PROPERTIES OF REFRACTORY CORDIERITE PRECURSORS PREPARED FROM RICE HUSK SILICA WITH DIFFERENT MgO ADDITION. Ceramics-Silikáty, 62 (2). pp. 163-172. ISSN 1804-5847

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Junaidi, Junaidi (2018) STRUCTURAL AND PHYSICAL PROPERTIES OF REFRACTORY CORDIERITE PRECURSORS PREPARED FROM RICE HUSK SILICA WITH DIFFERENT MgO ADDITION. Ceramics-Silikáty, 62 (2). pp. 163-173. ISSN ISSN 0862-5468 (Print), ISSN 1804-5847 (online)

Sembiring, simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2017) Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica. ORIENTAL JOURNAL OF CHEMISTRY, 33 (4). pp. 1828-1836. ISSN 0970-020 X

Sembiring, Simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2017) Effect of MgO-SiO2Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica. ORIENTAL JOURNAL OF CHEMISTRY, 33 (4). pp. 1828-1836. ISSN 0970-020 X

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Karo Karo, Pulung (2017) Effect of alumina addition on the phase transformation and crystallisation properties of refractory cordierite prepared from amorphous rice husk silica. Journal of Asian Ceramic Societies, 5 (2). pp. 186-192. ISSN 2187-0764

SEMBIRING, SIMON and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2017) Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4)) Precursors Characteristics Derived from Amorphous Rice Husk Silica. ORIENTAL JOURNAL OF CHEMISTRY, 33 (4). pp. 1828-1836. ISSN 0970-020 X

Simanjuntak, Wasinton and Sembiring, Simon and Pandiangan, Kamisah Delilawati and Syani, Faradilla and Situmeang, Rudy T.M (2016) The Use of Liquid Smoke as a Substitute for Nitric Acid for Extraction of Amorphous silica from Rice husk through Sol-Gel R. Oriental Journal of Chemistry, 32 (4). pp. 2079-2085. ISSN 0970-020 X

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Sebayang, Kerista (2016) Preparation of refractory cordierite using amorphous rice husk silica for thermal insulation purposes. Ceramic Internasional, 42 (7). pp. 8431-8437. ISSN 0272-8842

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Kerita, Sebayang (2016) Preparation of refractory cordierite using amorphous rice husk silica for thermal insulation purposes. Ceramic International, 42 (7). pp. 8431-8437. ISSN 0272-8842

Situmeang, Rudy T.M and wibowo, sukma and Simanjuntak, Wasinton and Supryanto, R and Amalia, Rizki and Septanto, Mitra and Manurung, Posman and Sembiring, Simon (2015) Characteristics of Nanosize Spinel NixFe3-XO4 Prepared By Sol-Gel Method Using Egg White As Emulsifying Agent. Indonesian Journal of Chemistry, 15 (2). pp. 116-122. ISSN 1411 9420

Manurung, Posman and Situmeang, Rudy T.M and Ginting, Ediman and Pardede, Indra (2015) SYNTHESIS AND CHARACTERIZATION OF TITANIA-RICE HUSK SILICA COMPOSITES AS PHOTOCATALYST. Indonesian Journal of Chemistry, 15 (1). pp. 36-42. ISSN 1411 9420

Situmeang, Rudy T.M and Manurung, Posman and Sulistyo, Septhian Tri and Hadi, Sutopo and Simanjuntak, Wasinton and Sembiring, Simon (2015) Sol-Gel Method for Preparation Of Nanosize NiFe2-XCoxO4 Using Egg White. Asian Journal of Chemistry, 27 (3). pp. 1138-1142. ISSN ISSN: 0975-427X (Online)

Simanjuntak, Wasinton and Sembiring, Simon and Manurung, Posman and Situmeang, Rudy T.M and Low, I.M (2013) Characteristics of aluminosilicates prepared from rice husk silica and aluminum metal. Ceramic Internasional, 39 (8). pp. 9369-9375. ISSN 0272-8842

Situmeang, Rudy T.M (2007) NiO/LaCrO3 PREPARED BY CITRIC ACID – FREEZE DRYING METHOD FOR NO2 CONVERSION. Jurnal Sains MIPA, 13 (2). pp. 144-148. ISSN 1978-1873

Sembiring, Simon and Riyanto, Agus and Situmeang, Rudy T.M and Sembiring, Zipora BITUMINOUS COMPOSITE COMPRISING AMORPHOUS SILICA FROM RICE HUSKS. Ceramics-Silik�ty, 63 (3). ISSN 1804-5847

Sembiring, Simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M Effect of MgO-SiO2 Ratio on the Forsterite (Mg2SiO4) Precursors Characteristics Derived from Amorphous Rice Husk Silica. oriental of chemistry, Vol. 3. ISSN 0970-020 X CODEN: OJCHEG 2017, Vol. 33, No. (4): Pg.1828-1836

riantini, maya and Achdiansyah, Sulaiman and Situmeang, Rudy T.M Pemberdayaan Perempuan Pada Kelompok Wanita Tani (KWT) Untuk Meningkatkan Pendapatan Rumah Tangga Petani di Desa Enggalrejo, Kabupaten Pringsewu. Open Community Service Journal, 1 (1). pp. 44-48. ISSN 2828-2892/ 2828-1195

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M STRUCTURE AND MICROSTRUCTURE PROPERTIES OF А REFRACTORY CORDIERITE PREPARED FROM AMORPHOUS RICE HUSK SILICA RESULTING FROM PERICLACE INTRODUCTION. Journal of Chemical Technology and Metallurgy, 54, 4, 2019, 721-726.

Book Section

Situmeang, Rudy T.M (2019) Pectins as Emulsifying Agent on the Preparation, Characterization, and Photocatalysis of Nano LaCrO3. In: Pectins - Extraction, Purification, Characterization, and Applications. IntechOpen Limited, 32 London Bridge Street, London, United Kingdom, SE1 9SG. (In Press)

Situmeang, Rudy T.M (2006) PERAN ANALISIS KIMIA DALAM PERKEMBANGAN KATALIS. In: Aplikasi dan Metode Analisis Kimia: Suatu Seri Monograf. Jurusan Kimia Fakultas MMIPA Unila - Kimia Press dan Ami Press, Bandar Lampung, pp. 87-103. ISBN 979-15222-0-0

Conference or Workshop Item

Simanjuntak, Wasinton and Tampubolon, Yosefin and Pandiangan, Kamisah Delilawati and Situmeang, Rudy T.M (2021) PENGARUH SUHU KALSINASI ZEOLIT-X TERHADAP KARAKTERISTIK LIQUID FUEL HASIL PIROLISIS MINYAK KELAPA SAWIT. In: Seminar Nasional Bersama FMIPA Unila Tahun 2021, 8-9 September 2021, Bandar Lampung. (Unpublished)

Sembiring, Simon and Riyanto, Agus and Firdaus, Iqbal and Junaidi, Junaidi and Situmeang, Rudy T.M (2021) Effect of calcination temperature on silica-asphalt composite properties using amorphous rice husk silica. In: ICASMI 2020, 3-4 September 2020, Bandar Lampung.

Pandiangan, Kamisah Delilawati and Simanjuntak, Wasinton and Sembiring, Zipora and Situmeang, Rudy T.M and Satria, Heri (2018) LIQUID FUEL PRODUCTION BY CO-PYROLYSIS OF SUGARCANE BAGASSE AND RUBBER SEED OIL USING ZEOLITE-A SYNTHESIZED FROM RICE HUSK SILICA AND ALUMINUM METAL AS CATALYST. In: SEMIRATA 2018 Bidang MIPA Wilayah Barat, 4-6 May 2018, INDONESIA. (Unpublished)

Simanjuntak, Wasinton and Sembiring, Zipora and Pandiangan, Kamisah Delilawati and Situmeang, Rudy T.M (2017) Chemical Composition of Liquid Fuel Produced By Co-pyrolysis of Sugarcane Bagasse and Rubber Seed Oil Using Zeolite-Y Synthesized From Rice Husk Silica and Aluminum Metal as Catalyst. In: First International Conference on Applied Sciences, Mathematics and Informatics 1st ICASMI 2017, 13 - 15 Juli 2017, Bandar Lampung. (Unpublished)

Situmeang, Rudy T.M (2016) Nanodot Catalyst S/TiO2 : Photocatalytic Degradation of Methanyl Yellow Azo Dye. In: SEMIRATA Bidang MIPA 2016; BKS-PTN Barat, 22-24 Mei 2016, Palembang.

Sembiring, Simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Sebayang, Kerista (2016) EFEK PENAMBAHAN ALUMINA PADA KARAKTERISTIK MIKROSTRUKTUR DAN FISIS CORDIERITE DARI SILIKA AMORPH SEKAM PADI. In: PROSIDING SEMINAR NASIONAL KIMIA – LOMBOK 2016, 10-11 2016, http://kimia.mipa.unram.ac.id/index.php/tag/seminar-nasional-kimia-2016/.

Sembiring, Simon and Riyanto, Agus and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Sebayang, Kerista (2016) EFEK PENAMBAHAN ALUMINA PADA KARAKTERISTIK MIKROSTRUKTUR DAN FISIS CORDIERITE DARI SILIKA AMORPH SEKAM PADI. In: SEMINAR NASIONAL KIMIA ( SNK ) 2016, 10 - 11 Agustus 2016, Mataram.

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2016) Effect of Alumina addition on the Phase Composition of Cordierite Precursors from Rice Husk Silica. In: SEMIRATA Bidang MIPA 2016; BKS-PTN Barat, 22-24 Mei 2016, Palembang.

Sembiring, Simon and Riyanto, Agus and Rumiyanti, Leni and Simanjuntak, Wasinton and Situmeang, Rudy T.M (2016) Effect of Alumina addition on the Phase Composition of Cordierite Precursors from Rice Husk Silica. In: SEMIRATA Bidang MIPA 2016; BKS-PTN Barat, 22-24 Mei 2016, Palembang.

Sulistiyo, Septian Tri and Situmeang, Rudy T.M (2015) Characteristics of nanosize spinel Ni0.9Fe2Co0.1O4 prepared by a sol-gel method using pectin as an emulsifying agent. In: The 1st International Conference on Sciences and Science Education, November 2015, Salatiga.

Djayasinga, Rodhiansyah and Situmeang, Rudy T.M (2015) Preparation and Characterization of Nanosite Spinel Ni0.9Fe2Cu0.1O4 Using Pectin as Binding Agent. In: The International Conference on Science and Science Education, 1 Agustus 2015, Salatiga.

Situmeang, Rudy T.M and Supriyanto, R and Septianto, Mitro and Simanjuntak, Wasinton and Sembiring, Simon and Roger, Anne-Cecile (2013) NixCoyFe1-x-yO4 Nanocatalyst: Preparation, Characterization and Catalytic Activity in CO2/H2 Conversion. In: the 2nd International Confrence of the Indonesian Chemical Society 2013, 22 - 23 October 2013, Yogyakarta.

Situmeang, Rudy T.M and Fransisca, Nova (2011) STUDY OF Co3O4/Nife2o4 CATALYST FOR GLUCOSE CONVERSION IN THE LOW TEMPERATURE. In: SEMINAR NASIONAL SAINS DAN TEKNOLOGI IV, 29-30 Novenber 2011, Bandar Lampung, Indonesia.

Situmeang, Rudy T.M and Septiano, Mitra and Sulisthio, Tri Septian (2011) NiFe2O4 Catalyst : The Influence of Gas Feed Composition on CO2/H2 Conversion into Alcohol Compounds. In: 14th Asian Chemical Congress 2011, 5 - 8 September 2011, Bangkok.

Situmeang, Rudy T.M and Indriani, Bekti Rahayu and Sukmawibowo, Sukmawibowo (2010) KATALIS LaCr1-xFexO3-δ: PREPARASI, KARAKTERISASI DAN KONVERSI GLUKOSA. In: Seminar Nasional Sains dan Teknologi - III, Bandar Lampung, 18 - 19 Oktober 2010, Universitas Lampung.

Situmeang, Rudy T.M and Sukmawibowo, Sukmawibowo and Julianti, Fitri and Aliana, Sarah (2010) Fe1-xNixO3±δ CATALYST FOR CONVERTING CO2/H2 TO ALCOHOL COMPOUNDS. In: The International Confrence on Materials Science and Technology, 19 September 2010, Serpong, Indonesia.

Situmeang, Rudy T.M and Supriyanto, Supriyanto and Simanjuntak, Wasinton and Susilo, Joko (2009) NiO/LaCrO3 Catalyst for converting methane to Methanol. In: International Seminar ON SUSTAINABLE BIOMASS PRODUCTION AND UTILIZATION: CHALLENGES AND OPPORTUNITIES, 3-4 Augsut 2009, Bandar L ampung.

Situmeang, Rudy T.M (2008) Kajian Konversi Asetilen dengan Katalis Fe2O3/ Zeolit pada Temperatur Rendah. In: Seminar Nasional Sains dan Teknologi-II, 17-18, Universitas Lampung.

Simon, Sembiring and Riyanto, Agus and Iqbal Firdaus, I.F and Junaidi, Junaidi and Situmeang, Rudy T.M Effect of Calcination Temperature on Silica-Asphalt Composite Properties using Amorphous Rice Husk Silica. In: ICASMI 2020, 3 September 2020, Bandar Lampung. (Submitted)

Situmeang, Rudy T.M and Sembiring, Simon NANO LACRO3 : PENENTUAN SENJANG-ENERGI DENGAN SPEKTROFOTOMETER UV-VIS. In: Seminar Nasional Kimia 2017, 11 September 2017, The Axana Hotel. (Unpublished)

Other

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Sebayang, Kerista (2022) Peer Review_2016_Sembiring_Ceramics International. -. (Unpublished)

Simanjuntak, Wasinton and Sembiring, Simon and Pandiangan, Kamisah Delilawati and Syani, Faradilla and Situmeang, Rudy T.M (2022) Peer Review_2016_Simanjuntak_Oriental journal of chemistry (Volume 32). -. (Unpublished)

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Karo Karo, Pulung (2022) Peer Review_2017_Sembiring_Journal of Asian Ceramic Societies. -. (Unpublished)

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Junaidi, Junaidi (2022) Peer Review_2018_Sembiring_Ceremics Silikaty. -. (Unpublished)

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Sebayang, Kerista (2021) Similirity_2016_Sembiring_Ceramics International_Refractory Cordierite_2. -. (Unpublished)

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Karo Karo, Pulung (2021) Similirity_2017_Sembiring_JACER 2017_2. -. (Unpublished)

Sembiring, Simon and Simanjuntak, Wasinton and Situmeang, Rudy T.M and Riyanto, Agus and Junaidi, Junaidi (2021) Similirity_2018_Sembiring_Ceramics-Silikáty_2. -. (Unpublished)

Simanjuntak, Wasinton and Sembiring, Simon and Pandiangan, Kamisah Delilawati and Syani, Faradilla and Situmeang, Rudy T.M (2020) Similirity_2016_Simanjuntak_OJC_32_4_The Use of Liquid Smoke as a Substitute for Nitric Acid. -. (Unpublished)