Items where Author is "Motlan"

Motlan and Sinulingga, Karya and Sinuraya, Jurubahasa (2023) PENDAMPINGAN PENYUSUNAN PERANGKAT PEMBELAJARAN BERBASIS PENDEKATAN SCIENTIFICS DAN ACADEMIC SUCCESSSKILLS UNTUK GURU SMP SWASTA DELI MURNI DESA SUKA MAJU KECAMATAN SUNGGAL PROVINSI SUMATERA UTARA. In: Seminar Nasional Pengabdian kepada Masyarakat, Seminar dalam Jaringan LPPM Universitas Negeri Medan, 13 September 2023, Medan. (In Press)

Motlan and Sinuraya, Juru Bahasa and Mihardi, Satria (2022) Needs Analysis on Learning Devices to Support Blended Based High School Physics Teaching of North Sumatra. In: The 8th Annual International Seminar on Trends in Science and Science Education (AISTSSE) 2021, 3 Nov 2021, Medan.

Siregar, Nurdin and Sirait, Makmur and Motlan (2022) SYNTHESIS AND OPTICAL PROPERTIES OF Sb-DOPED ZnO THIN FILM BY SOL-GEL SPIN COATING METHOD. In: The 3rd International Conference on Sciences and Technology Applications (ICOSTA) 2021, Medan, 2 Nov 2021.

Erniria and Motlan and Siregar, Nurdin (2021) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZnO Cu DENGAN VARIASI KECEPATAN PUTARAN BERBAHAN DYE BUAH KARAMUNTING. Jurnal Einstein, 09 (01). pp. 33-39. ISSN 2338-1981

Motlan and Ferdinand, Diego and Siregar, Nurdin (2021) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZnO:Mg DENGAN DYE EKSTRAK KULIT MANGGIS. Jurnal Einstein, 09 (02). pp. 51-55. ISSN 2338-1981

Siregar, Nurdin and Motlan and Panggabean, Jonny Haratua (2021) EFFECT OF POST-HEATING TEMPERATURE ON EFFICIENCY OF DYE-SENSITIZED SOLAR CELL WITH ZnO : AL THIN FILMS PREPARED BY SOL-GEL SPIN COATING. Journal of Physical Science, 32 (02). pp. 57-70. ISSN 2180-4230

Motlan and Siregar, Nurdin and Panggabean, Jonny Haratua (2021) THE EFFECT OF SPIN COATING SPEED ON STRUCTURAL AND OPTIVAL PROPERTIES OF ZnO AND ZnO/DYE FILMS SYNTHESIZED BY SOL-GEL SPIN COATING METHOD. In: The 7th Annual International Seminar on Trends in Science and Science Education (AISTSSE) 2020, 17 Nov 2020, Medan.

Motlan and Siregar, Nurdin (2021) THE EFFICIENCY OF NATURAL DYES-BASED DYE SENSITIZED SOLAR CELLS. Journal of Physical Science, 31 (01). pp. 57-68. ISSN 2180-4230

Siregar, Nurdin and Motlan and Panggabean, Jonny Haratua and Sirait, Makmur and Rajagukguk, Juniastel and Gultom, Noto Susanto and Sabir, Fedlu Kedir (2021) FABRICATION OF DYE-SENSITIZED SOLAR CELLS (DSSC) USING Mg-Doped ZnO AS PHOTOANODE AND EXTRACT OF ROSE MYRTLE (Rhodomyrtus tomentosa) AS NATURAL DYE. International Journal of Photoenergy, 2021. pp. 1-7. ISSN 1110-662X

Siregar, Nurdin and Motlan (2021) PENGARUH KECEPATAN PUTARAN TERHADAP STRUKTUR DAN SIFAT OPTIK FILM TIPIS ZnO DENGAN METODE SOL-GEL SPIN COATING. Jurnal Einstein, 09 (02). pp. 1-6. ISSN 2338-1981

Siregar, Nurdin and Motlan and Panggabean, Jonny (2020) THE EFFECT MAGNESIUM (Mg) ON STRUCTURAL AND OPTICAL PROPERTIES OF ZnO:Mg THIN FILM BY SOL-GEL SPIN COATING METHOD. In: The 4th International Conference on Applied Physics and Materials Application, 18-20 Sept 2019, Sumatera Utara.

Motlan and Siregar, Nurdin and Panggabean, Jonny (2020) THE EFFECT OF POST ANNEALING TIME ON STRUCTURAL AND OPTICAL PROPERTIES OF ZnO THIN FILMS BY SOL-GEL SPIN COATING METHOD. In: The 4th International Conference on Applied Physics and Materials Application, 18-20 Sept 2019, Sumatera Utara.

Sagala, Yenni Dwi Aprilita and Simanjuntak, Mariati Purnama and Bukit, Nurdin and Motlan (2019) PENERAPAN PROJECT BASED LEARNING BERBASIS LKS TERHADAP KETERAMPILAN BERPIKIR KRITIS SISWA. Jurnal Pendidikan Fisika, 8 (2). pp. 85-90. ISSN 2252-732X

Simanjuntak, Mariati Purnama and Bukit, Nurdin and Sagala, Yenni Dwi Aprilita and Putri, Rahma Khairani and Utami, Zaskya Laksmitha and Motlan (2019) DESAIN PEMBELAJARAN BERBASIS PROYEK TERHADAP 4C. Jurnal Inovasi Pembelajaran Fisika (INPAFI), 7 (3). pp. 38-46. ISSN 2337-4624

Ginting, Eva Marlina and Bukit, Nurdin and Motlan and Gultom, Debora and Frida, Erna and Bukit, Bunga Fisikanta (2019) PREPARATION AND CHARACTERIZATION OF OIL PALM EMPTY BUNCHES POWDER AS A FILLER OF POLYPROPYLENE/ NATURAL RUBBER. International Journal of Civil Engineering and Technology (IJCET), 10 (06). pp. 453-464. ISSN 0976-6308

Siregar, Nurdin and Purba, Nurhabibah and Motlan (2019) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZNO:B DAN EKSTRAK DYE DARI UBI UNGU. Jurnal Einstein, 07 (01). pp. 5-9. ISSN 2338-1981

Motlan and Novita and Siregar, Nurdin (2019) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZnO DAN EKSTRAK DYE TERUNG BELANDA. Jurnal Einstein, 07 (02). pp. 18-22. ISSN 2338-1981

Motlan and Lelyana and Siregar, Nurdin (2019) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZnO DENGAN VARIASI KECEPATAN PUTARAN BERBAHAN DYE BUNGA KEMBANG SEPATU. Jurnal Einstein, 07 (02). pp. 13-17. ISSN 2338-1981

Siregar, Nurdin and Gultom, Pangihutan and Motlan (2019) DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN FILM TIPIS ZnO:AL BERBASIS DYE DARI BUAH NAGA MERAH. Jurnal Einstein, 07 (02). pp. 23-27. ISSN 2338-1981

Ginting, Eva Marlina and Motlan and Bukit, Nurdin and Saragih, M. T. and Sinaga, A. H. and Frida, Erna (2018) PREPARATION AND CHARACTERIZATION OF OIL PALM EMPTY BUNCHES POWDER. In: The 8th International Conference on Theoretical and Applied Physics, 20-21 Sept 2018, Medan.

Sirait, Makmur and Motlan (2018) FISIKA MATERIAL. Lembaga Penelitian UNIMED, Medan. ISBN 978-602-52467-0-8

Motlan and Siregar, Nurdin (2018) THE EFFECT OF POST-HEATING TEMPERATURE ON OF THE EFICENCY OF DYE SENSITIZED SOLAR CELL (DSSC) WITH USING ZnO THIN FILM AND DYE FROM DUTCH EGGPLANT FRUIT (Solanum betaceum). In: The 8th International Conference on Theoretical and Applied Physics, 20-21 Sept 2018, Medan.

Motlan and Siregar, Nurdin (2018) THE EFFECT OF POST-HEATING TIME OF ZnO THIN FILM ON THE EFFICIENCY OF ZnO/Hylocereus polyrhizus DSSC. Edelweiss Applied Science and Technology, 03 (01). pp. 70-74. ISSN 2576-8484

Siregar, Nurdin and Motlan (2018) THE EFFECT OF PRE-HEATING TEMPERATURE ON STRUCTURAL AND OPTICAL PROPERTIES ZnO THIN FILM SYNTHESIZED USIN SOL-GEL SPIN COATING METHOD. In: The 8th International Conference on Theoretical and Applied Physics, 20-21 Sept 2018, Medan.

Motlan and Sinuraya, Juru Bahasa and Sinulingga, Karya (2018) PEDOMAN PENYUSUNAN PERANGKAT PEMBELAJARAN BERBASIS PENDEKATAN SCIENTIFICS DAN ACADEMIC SUCCESS SKILLS. Unimed Press, Medan.

Harahap, Resti and Motlan and Bukit, Nurdin (2017) THE EFFECTS OF INQUIRY TRAINING LEARNING MODEL ASSISTED MIND MAP FOR CONCEPTUAL KNOWLEDGE AND SCIENCE PROCESS SKILLS. IOSR Journal of Research & Method in Education, 07 (05). pp. 26-31. ISSN 2320-7388-p, 2320-737X-p

Sirait, Makmur and Motlan (2017) SYNTHESIS AND MORPHOLOGY OF POLYVINYL ALCOHOL /ZINC SULFIDE NANOCOMPOSITE. In: Innovation in Polymer Science and Technology (IPST) 2016, 7-10 Nov 2016, Medan.

Motlan and Sinuraya, Juru Bahasa and Sinulingga, Karya (2017) ANALYSIS REGRESSION OF LECTURE PERCEPTION IN LEARNING BASED KKNI CURRICULA IN INDONESIA. Journal of Education and Practice, 08 (32). pp. 46-51. ISSN 2222-1735

MANALU, SANTRO NOMEMBER and Motlan and Siregar, Nurdin (2017) THE EFFECT OF INQUIRY TRAINNG ON LEARNING MODEL USING MACROMEDIA FLASH AND CREATIVITY ON STUDENT'S SCIENCE PROCESS SKILLS. Journal of Education and Practice, 08 (34). pp. 15-21. ISSN 2222-1735

Lumbantoruan, Masni and Motlan (2017) THE ENHANCEMENT OF MULTIMEDIA BASED INQUIRY TRAINING LEARNING MODEL ON STUDENT’S ACHIEVEMENT. Journal of Education and Practice, 08 (26). pp. 144-148. ISSN 2222-1735

Rafiqie, Dinie and Motlan (2017) KARAKTERISASI PAPAN KOMPOSIT BERBAHAN SERBUK TEMPURUNG KELAPA DAN HIGH DENSITY POLYETHYLENE. Jurnal Einstein, 05 (01). pp. 1-6. ISSN 2338-1981

Siregar, Nurdin and Motlan and Zega, Fatmawati (2016) PENGARUH SUHU POST-HEATING TERHADAP STRUKTUR DAN SIFAT OPTIK FILM TIPIS ZnO YANG DISINTESIS DENGAN METODE SOL-GEL SPIN COATING. In: Seminar Nasional Hilirisasi Penelitian 2016, 21 Dec 2016, Medan.

Motlan and Sinuraya, Juru Bahasa (2016) FISIKA UMUM I. Unimed Press, Medan. ISBN 976-602-431-009-7

Motlan and Sinulingga, Karya and Siagian, Henok (2016) INQUIRY AND BLENDED LEARNING BASED LEARNING MATERIAL DEVELOPMENT FOR IMPROVING STUDENT ACHIEVEMENT ON GENERAL PHYSICS I OF MATHEMATICS AND NATURAL SCIENCE OF STATE UNIVERSITY OF MEDAN. Journal of Education and Practice, 07 (28). pp. 171-176. ISSN 2222-1735

Winarsih, Sehati and Motlan and Hakim S., Abdul (2016) KRISTALISASI SUPERKONDUKTOR Bscco (2212) DAN PENGARUH PENAMBAHAN DOPING Pb DENGAN METODEPADATAN. Jurnal Einstein, 04 (01). pp. 60-64. ISSN 2338-1981

Motlan and Sinulingga, Karya and Siagian, Henok (2016) MODUL BAHAN AJAR FISIKA UMUM I BERBASIS INQUIRY-BLENDED LEARNING. Unimed Press, Medan.

Lumban Gaol, Lisbet and Motlan (2016) PENGUJIAN SIFAT MEKANIK KOMPOSIT POLYPROPILENA (Pp) DAUR ULANG DENGAN FILLER SERAT TANAMAN LIDAH MERTUA (SANSEVIERAS TRIFASCIATA). Jurnal Einstein, 04 (03). pp. 8-14. ISSN 2338-1981

Motlan and Sinulingga, Karya and Siagian, Henok (2015) PENGEMBANGAN BAHAN AJAR BERBASIS INKUIRI DAN BLENDED LEARNING UNTUK MENINGKATKAN CAPAIAN DAN KOMPETENSI MATA KULIAH FISIKA UMUM DI FMIPA UNIMED. Project Report. FMIPA Unimed.

Rahmatsyah and Marlianto, Eddy and Sitepu, Mester and Motlan (2015) ANALYSIS OF THE PORITES CORAL REEF GROWTH BASED ON NATURAL CAUSES IN CENTRAL TAPANULI SUB REGION, NORTH SUMATRA INDONESIA. International Journal of Sciences : Basic and Applied Research (IJSBAR), 22 (05). ISSN 2307-4531

Motlan and Sinuraya, Juru Bahasa (2015) FISIKA UMUM 2. Larispa Indonesia, Medan. ISBN 978-602-18010-4-8

Juliani, Rita and Sembiring, Timbangen and Sitepu, Mester and Motlan (2015) GEOPHYSICAL STUDY FOR DISCOVERING THE MISSING OF LAU KETUKEN FROM THE SURFACE AT SULKAM VILLAGE. International Journal of Sciences : Basic and Applied Research (IJSBAR), 22 (01). pp. 360-366. ISSN 2307-4531

Marbun, Lucius and Motlan (2015) COOPERATIVE TYPE NUMBERED HEADS TOGETHER EFFECT ON STUDENTS ACHIEVEMENT IN EXPANSION TOPIC. Jurnal INPAFI, 03 (03). ISSN 2337-4624

Ramadhani, Irham and Motlan (2015) EFEK MODEL PEMBELAJARAN BERBASIS PROYEK DENGAN STRATEGI THINK TALK WRITE DAN KREATIVITAS ILMIAH TERHADAP HASIL BELAJAR KOGNITIF TINGKAT TINGGI SISWA SMA PADA PELAJARAN FISIKA. Jurnal Pendidikan Fisika, 04 (01). pp. 17-24. ISSN 2252-732X

Siregar, Nurdin and Marlianto, Eddy and Gea, Saharman and Motlan (2015) THE EFFECT OF CONCENTRATION OF STRUCTURE AND OPTICAL PROPERTIES OF THIN FILMS SYNTHESIZED BY SOL-GEL METHODS SPIN COATING. International Journal of Sciences : Basic and Applied Research (IJSBAR), 22 (01). pp. 428-434. ISSN 2307-4531

Siregar, Lia Anggraini and Motlan (2015) THE EFFECT OF CONCENTRATION OF STRUCTURE AND OPTICAL PROPERTIES OF THIN FILMS SYNTHESIZED BY SOL-GEL METHODS SPIN COATING. Jurnal INPAFI, 03 (04). pp. 91-96. ISSN 2337-4624

Siregar, Lia Anggraini and Motlan (2015) THE EFFECT OF GUIDED INQUIRY LEARNING MODEL ON STUDENT’S LEARNING OUTCOMES IN TOPIC DYNAMIC ELECTRICITY IN CLASS X SEMESTER II SMA N 2 KISARAN A.Y.2014/2015. Jurnal INPAFI, 03 (04). pp. 91-96. ISSN 2337-4624

Kamelia, Evi and Motlan (2015) THE EFFECT OF PROBLEM BASED LEARNING MODEL ON STUDENT’S LEARNING OUTCOMES IN STATIC FLUID TOPIC OF CLASS X SMA NEGERI 3 MEDAN ACADEMIC YEAR 2013/2014. Jurnal INPAFI, 03 (01). pp. 48-54. ISSN 2337-4624

Hutapea, Ferawati and Motlan (2015) PENGARUH MODEL PEMBELAJARAN INQUIRY TRAINING DAN KEMAMPUAN BERPIKIR KRITIS TERHADAP KETERAMPILAN PROSES SAINS SISWA SMA. Jurnal Pendidikan Fisika, 22 (02). pp. 55-62. ISSN 2252-732X

Tamba, Paian and Motlan (2015) PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA MATERI POKOK CAHAYA DI KELAS VIII SMP SWASTA ASSISI MEDAN T.A. 2013/2014. Jurnal INPAFI, 03 (01). pp. 147-154. ISSN 2337-4624

Sirait, Rudi Hamonangan and Motlan (2015) PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA MATERI POKOK FLUIDA STATIS DI KELAS XI SMA NEGERI 9 MEDAN T.A. 2013/2014. Jurnal INPAFI, 03 (02). pp. 167-176. ISSN 2337-4624

Lembaga Penelitian Universitas Negeri Medan (2014) NANOKOMPOSIT CAMPURAN POLYVINYL ALKOHOL DAN SENGSULFAT DAN METODE PEMBUATANNYA. IDP000042886.

Sirait, Makmur and Gea, Saharman and Motlan and Marlianto, Eddy (2014) EFFECT OF MIXED NANOPARTICLES ZnS AND POLYVINYL ALCOHOL (PVA) AGAINST NANOCOMPOSITE MECHANICAL PROPERTIES OF PVA / ZnS. American Journal of Physical Chemistry, 3 (1). pp. 5-8. ISSN 2327-2449

Motlan and Sihombing, Eidi (2010) FISIKA DASAR 1. Citapustaka Media Perintis, Bandung. ISBN 978-602-8826-52-5

Motlan and Siregar, Nurdin (2009) THE EFFECT OF SPINNING VELOCITY ON STRUCTURAL AND OPTICAL PROPERTIES ZnO THIN FILM SYNTHESIZED USING SOL-GEL SPIN COATING METHOD. In: International Conference on Innovation in Education, Science and Culture (ICIESC-2017), 8-9 Nov 2017, Medan.

Motlan and Zhu, Guanghua and Drozdowicz-Tomsia, K. and McBean, K. and Philips, M.R. and Goldys, E.M. (2007) ANNEALING OF ZNS NANOCRYSTALS GROWN BY COLLOIDAL SYNTHESIS. Jurnal Optical Materials, 29 (12). pp. 1579-1583. ISSN 0925-3467

Zhu, Guanghua and Tomsia, Krystyna and Yu, Hong and Motlan and Goldys, E.M. (2007) CHEMICALLY BINDING EU3+ ONTO CDS SEMICONDUCTOR NANOPARTICLE SURFACE. JurnalChinese Chemical Letters, 18 (05). pp. 581-584. ISSN 1001-8417

Zhu, Guanghua and Drozdowicz-Tomsia, K. and Yu, Hong and Motlan and Goldys, E.M. (2006) SYNTHESIS AND CHARACTERIZATION OF DISODIUM ETHYLENEDIAMINETETRAACETIC ACID CAPPED AND EUROPIUM DOPED CDS NANOPARTICLES. Jurnal Solid State Communications, 137 (09). pp. 503-506. ISSN 0038-1098

Goldys, E.M. and Drozdowicz-Tomsia, K. and Zhu, Guanghua and Yu, Hong and Jinjun, S. and Motlan and Godlewski, M. (2006) FLUORESCENCE LABELLING. Optica Applicata, 36 (02). pp. 217-224. ISSN 1899-7015

Drozdowicz-Tomsia, K. and Goldys, E.M. and Motlan and Zareie, Hadi and Philips, M.R. (2005) GROWTH-TEMPERATURE-DEPENDENT CATHODOLUMINESCENCE PROPERTIES OF GaSb/GaAs QUANTUM-DOT MULTILAYER STRUCTURES. Applied Physics Letters, 86 (17). ISSN 1077-3118

Motlan and Goldys, E.M. and Butcher, K.S.A. and Tansley, T.L. (2004) CATHODOLUMINESCENCE OF GaSb/GaAs SELF-ASSEMBLED QUANTUM DOTS GROWN BY MOCVD. Jurnal Materials Letters, 58 (01). pp. 80-83. ISSN 0167-577X

Motlan and Butcher, K.S.A. and Goldys, E.M. and Tansley, T.L. (2003) MULTILAYER GaSb/GaAs SELF-ASSEMBLED QUANTUM DOTS GROWN BY METALORGANIC CHEMICAL VAPOR DEPOSITION. Jurnal Materials Chemistry and Physics, 81 (01). pp. 8-10. ISSN 0254-0584

Motlan and Goldys, E.M. and Tansley, T.L. (2002) THE EFFECT OF TARGET NITRIDATION ON STRUCTURAL PROPERTIES OF InN GROWN BY RADIO-FREQUENCY REACTIVE SPUTTERING. Jurnal Thin Solid Films, 422 (01). pp. 28-32. ISSN 0040-6090

Motlan and Goldys, E.M. and Dao, L.V. (2002) PHOTOLUMINESCENCE OF GaSb SELF-ASSEMBLED QUANTUM DOT LAYERS GROWN BY METALORGANIC CHEMICAL VAPOR DEPOSITION. Journal of Vacuum Science & Technology B, 20 (01). ISSN 1071-1023

Motlan and Goldys, E.M. (2001) PHOTOLUMINESCENCE OF MULTI LAYER GaSb/GaAs SELF-ASSEMBLED QUANTUM DOTS GROWN BY METAL ORGANIC CHEMICAL VAPOR DEPOSITION AT ATMOSPHERIC PRESSURE. Applied Physics Letters, 79 (18). ISSN 1077-3118

Kumar, Sunil and Mo, Li and Motlan and Tansley, T.L. (1996) ELEMENTAL COMPOSITION OF REACTIVELY SPUTTERED INDIUM NITRIDE THIN FILMS. Japanese Journal of Applied Physics, 35 (4A). ISSN 1347-4065

Motlan (1999) MORFOLOGI FILM TIPIS HETEROEPITAXI GASB/GAAS YANG DITUMBUHKAN DENGAN MOCVD. Jurnal Pendidikan Science (01). pp. 13-19. ISSN 0853-3792

Motlan (1997) UPAYA PENINGKATAN PENGUASAAN KONSEP MEKANIKA DENGAN TEKNIK PENGAJARAN PEER KOLLABORASI. Jurnal Pendidikan Science (04). 09-14. ISSN 0853-3792

Motlan (1997) TERMODINAMIK DARI MESIN PANAS PRAKTIS. Jurnal Pendidikan Science (12). pp. 92-99. ISSN 0853-3792

Sinuraya, Juru Bahasa and Motlan and Tarigan, Ratelit (2012) EFFECT OF THE USE OF THE VALUE OF TASK-BASED RESOURCES OF CTL TO LEARN THE VALUE OF TESTS IN PHYSICS MAJOR GENERAL PHYSICS I FMIPA UNIMED. Jurnal Online Pendidikan Fisika, 01 (01). pp. 17-25. ISSN 2301-7651

Sinuraya, Juru Bahasa and Motlan and Tarigan, Ratelit (2012) INOVASI STRATEGI PEMBELAJARAN BERBASIS METODE INKUIRI DAN BLENDED LEARNING PRODI PENDIDIKAN FISIKA FMIPA UNIMED. Jurnal Online Pendidikan Fisika, 01 (01). pp. 17-25. ISSN 2301-7651

Motlan and Sinuraya, Juru Bahasa and Tarigan, Ratelit (2012) PENGARUH METODE INKUIRI BERBASIS BLENDED LEARNING DAN KREATIVITAS BELAJAR TERHADAP HASIL BELAJAR MAHASISWA PADA MATA KULIAH FISIKA UMUM I DI FMIPA UNIMED. Jurnal Penelitian Bidang Pendidikan, 18 (02). pp. 72-80. ISSN 0852-0151

Juliani, Rita and Motlan and Sembiring, Timbangen and Sitepu, Mester (2014) IDENTIFIKASI MINERAL BATU GAMPING DARI SULKAM DENGAN MENGGUNAKAN DIFRAKSI SINAR-X (XRD). In: Seminar Nasional Kimia 2014, 20 May 2014, Medan.