Profil Dosen
Nama
Prof. Dr Dra Rahmayeni, M.Si
Jenis Kelamin
Perempuan
Status
PNS
Jabatan
Guru Besar
Unit
Kimia
Fakultas
FAKULTAS MIPA
Pangkat/Gol
IV/d - Pembina Utama Madya
Pendidikan
#JenjangGelarNamaJurusanTahun Lulus
1S1DraUniversitas AndalasKimia1988
2S2M.SiInstitut Teknologi BandungKimia1993
3S3DrUniversitas AndalasKimia2017
Penelitian
#JudulTahunJenis/Hasil Karya Ilmiah~
1Komposit Magnetik Multifungsi Hidroksiapatit/mfe2o4 (m=cu Dan Zn) Berbasis Bahan Alam Yang Disintesis Secara Hidrotermal Dan Aplikasinya Sebagai Pengantar Obat, Anti Bakteri Dan Fotokatalis2023Material Maju
2Komposit Magnetik Multifungsi Hidroksiapatit/mfe2o4 (m=cu Dan Zn) Berbasis Bahan Alam Yang Disintesis Secara Hidrotermal Dan Aplikasinya Sebagai Pengantar Obat, Anti Bakteri Dan Fotokatalis2022Material Maju
3Persiapan Dan Karakterisasi Partikel Nano Emas/ Kitosan Dan Turunanya Sebagai Serum Untuk Perawatan Kulit Wajah2022Inovasi Sains
4Penggunaan Ekstrak Daun Jahe Merah Sebagai Inhibitor Korosi Baja Lunak Ramah Lingkungan Secara Eksperimen Dan Teoritis2022Inovasi Sains
5Pengaruh Modifikasi Kimia Dan Fisika Terhadap Lempung Sumatera Barat Pada Reaksi Transesterifikasi Minyak Nabati2022Energi
6Pemanfaatan Limbah Tandan Kelapa Sawit Sebagai Sumber Karbon Untuk Sintesis Material Komposit Magnetik Cufe2o4/c Aktif Dan Uji Aktivitasnya2021Inovasi Sains
7Modifikasi Cangkang Ketapang Dengan Putih Telur Ayam Ras Untuk Meningkatkan Kapasitas Penyerapan Zat Warna Indigo Carmine2021Material Maju
8Semikonduktor Magnetik Zno/mfe2o4 Yang Disintesis Secara Hidrotermal Menggunakan Ekstrak Bahan Alam: Suatu Fotokatalis Potensial Untuk Degradasi Limbah Zat Warna2020Energi
9Semikonduktor Magnetik Multifungsi Mfe2o4 (m=mn Dan Zn) Yang Disintesis Secara Hidrotermal Dengan Adanya Ekstrak Bahan Alam Sebagai Capping Agent Dan Aplikasinya Dalam Proses Fotokatalitik Dan Anti Bakteri2020Material Maju
10Semikonduktor Magnetik Multifungsi Mfe2o4 (m=mn Dan Zn) Yang Disintesis Secara Hidrotermal Dengan Adanya Ekstrak Bahan Alam Sebagai Capping Agent Dan Aplikasinya Dalam Proses Fotokatalitik Dan Anti Bakteri2019Material Maju
11Semikonduktor Magnetik Zno/mnfe2o4 Yang Disintesis Secara Hidrotermal Menggunakan Ekstrak Bahan Alam: Suatu Fotokatalis Potensial Untuk Degradasi Zat Warna2018Chemical Sciences
12Sintesis Nanokomposit Magnetik Zno-(mn/co)fe2o4 Dalam Media Bebas Organik Untuk Fotodegradasi Limbah Zat Warna Dalam Air Di Bawah Sinar Matahari.2017Material Maju
13Penerapan Metode Sintesis Solvotermal Untuk Meningkatkan Aktivitas Fotokatalis Nanokomposit Magnetik Tio2/zno-mefe2o4 Terhadap Degradasi Senyawa Organik Dalam Air2017Chemical Sciences
14Penerapan Metode Sintesis Solvotermal Untuk Meningkatkan Aktivitas Fotokatalis Nanokomposit Magnetik Tio2/zno-mefe2o4 Terhadap Degradasi Senyawa Organik Dalam Air2016
15Penerapan Metode Sintesis Solvotermal Untuk Meningkatkan Aktivitas Fotokatalis Nanokomposit Magnetik Tio2/zno-mefe2o4 Terhadap Degradasi Senyawa Organik Dalam Air2015
16Pemanfaatan Ampas Tebu Sebagai Bahan Dasar Pembuatan Karbon Aktif Untuk Sintesis Nanokomposit Znxcd1-xfe2o4/karbon Aktif Dan Aplikasinya Sebagai Penyimpanan Energi2024Material Maju
17Prospek Daun Pakis Sisik Naga Dan Pakis Pedang Sebagai Inhibitor Korosi Baja Ramah Lingkungan Dalam Medium Asam Klorida2024Material Maju
18Sintesis Senyawa Aurivillius Lapis-5, Ca2-xlaxbi4ti5-xmnxo18 Bersifat Multiferoik Berpotensi Pada Fotovoltaik2024Material Maju
19Pemanfaatan Lempung Asal Bukittinggi Yang Dimodifikasi Secara Fisika Dan Kimia Untuk Memproduksi Biodiesel Skala Laboratorium: Optimasi Kondisi Reaksi2022Energi
20Biosintesis Material Fungsional Mgxzn1-xfe2o4 Dimediasi Ekstrak Pati Sagu Dan Aplikasi Sebagai Semikonduktor Untuk Fotodegradasi Polutan Organik Dalam Air Dan Antibakteri2024Inovasi Sains
21Sintesis Spinel Ferit Berbasis Cdxni1-xfe2o4 Menggunakan Metode Sol-gel Autocombustion Yang Berpotensi Sebagai Penyimpanan Energi2024Inovasi Sains
22Sintesis Nanokomposit Hap/znfe1,9la0,1o4 Untuk Remediasi Ion Cr (vi) Melalui Adsoprsi Dan Fotokatalisis2025Inovasi Sains
Pengabdian
#JudulTahunJenis Pengabdian
No results found.
Buku
#JudulTahunISBNPenerbit
1Kimia Anorganik 120239786235825663CV. Future Business Machine Solusindo
2Kimia Anorganik 12023978-623-5825-66-3CV. Future Business Machine Solusindo
Publikasi Scopus
#JudulNama JurnalVolumeHalamanTanggal Publikasi
1The Improvement Of Indigo Carmine Dye Adsorption By Terminalia Catappa Shell Modified With Broiler Egg WhiteBiomass Conversion and Biorefinery1313795-138121 October 2023
2Cufe2o4/activated Carbon Nanocomposite For Efficient Photocatalytic Degradation Of Dye: Green Synthesis Approaches Using The Waste Of Oil Palm Empty Bunches And Bio-capping AgentCase Studies in Chemical and Environmental Engineering7-1 June 2023
3Optical Response Of Srtio3 Thin Films Grown Via A Sol-gel-hydrothermal MethodChimica Techno Acta10-1 January 2023
4Tuning The Structural, Magnetic, And Optical Properties Of Zno/nife2o4 Heterojunction Photocatalyst For Simultaneous Photodegradation Of Rhodamine B And Methylene Blue Under Natural SunlightEnvironmental Engineering Research28-1 April 2023
5Optimizing The Synthesis Of Silver Nanoparticles Using Five Curcuma Species Under Uv Irradiation As A Potent Suncreen SubstrateTropical Journal of Natural Product Research72926-29341 June 2023
6Cufe2o4/hydroxyapatite Magnetic Nanocomposite Synthesized Using Pensi Clam Shells As A Source Of Calcium For Degradation Of Dye And Anti-bacterial ApplicationsCase Studies in Chemical and Environmental Engineering8-1 December 2023
7Kaolinite And Illite Based Clay Supporting Nickel: Its Synthesis, Characterization, And Catalytic Optimazion In A Lab-scale Fatty Acid Methyl Ester ProductionHerald of the Bauman Moscow State Technical University, Series Natural Sciences109159-1741 January 2023
8Magnetic Particles Nanorod Of Zno/cufe2o4 Prepared By Green Synthesized Approach: Structural, Optical And Magnetic Properties, And Photocatalytic ActivityMaterials Research25-1 January 2022
9Effect Of Thermal Treatment And Nickel-salt Modification On The Catalytic Performance Of The Illite-kaolinite Clay From Bukittinggi Of West Sumatra In Palm Oil TransesterificationHerald of the Bauman Moscow State Technical University, Series Natural Sciences-125-1361 January 2022
10Spinel Ferrite Of Mnfe2o4 Synthesized In Piper Betle Linn Extract Media And Its Application As Photocatalysts And AntibacterialJournal of Dispersion Science and Technology42465-4741 January 2021
11Simbang Darah (iresine Herbstii) Extract Mediated Hydrothermal Method In The Synthesis Of Zinc Ferrite Spinel Nanoparticles Used For Photocatalysis And Antibacterial ApplicationsJournal of Environmental Chemical Engineering9-1 April 2021
12Terminalia Catappa Shell As Low-cost Biosorbent For The Removal Of Methylene Blue From Aqueous SolutionsJournal of Industrial and Engineering Chemistry97188-19925 May 2021
13Effectiveness And Efficiency Between Cuo/natural Zeolite Catalysts And Zno/natural Zeolite In Naphthol Blue–black Waste Management By Photolysis Degradation MethodDesalination and Water Treatment226400-4071 June 2021
14Photolysis Of Naphthol Blue-black From Kubang Weaving Waste Using Tio2/zeolite As A CatalystRasayan Journal of Chemistry141247-12541 April 2021
15Mangifera Odorata Griff Seed Extract As Corrosion Inhibitor Of Mild Steel In Hydrochloric Acid MediumRasayan Journal of Chemistry13230-2391 January 2020
16Biosorption Of Indigo Carmine From Aqueous Solution By Terminalia Catappa ShellJournal of Environmental Chemical Engineering8-1 October 2020
17Synthesis Of Zno/znfe2o4nanocomposites In Organic Free Media And Their Photocatalytic Activity Under Natural SunlightJournal of Mechanical Engineering and Sciences146801-681022 June 2020
18Green Synthesis Of Nife2o4 Spinel Ferrites Magnetic In The Presence Of Hibiscus Rosa-sinensis Leaves Extract: Morphology, Structure And ActivityRasayan Journal of Chemistry121942-19491 October 2019
19Green Synthesis And Characterization Of Zno-cofe2o4 Semiconductor Photocatalysts Prepared Using Rambutan (nephelium Lappaceum L.) Peel ExtractMaterials Research22-1 January 2019
20Utilization Of Natural Zeolite Clinoptilolite-ca As A Support Of Zno Catalyst For Congo-red Degradation And Congo-red Waste Applications With PhotolysisOriental Journal of Chemistry34887-8931 January 2018
21Photocatalytic Performance Of Zno-znfe2o4 Magnetic Nanocomposites On Degradation Of Congo Red Dye Under Solar Light IrradiationJournal of Materials and Environmental Science81634-16431 January 2017
22Magnetically Separable Zno-mnfe2o4 Nanocomposites Synthesized In Organic-free Media For Dye Degradation Under Natural SunlightOriental Journal of Chemistry332758-27651 January 2017
23Synthesis Of Zno-nife2o4 Magnetic Nanocomposites By Simple Solvothermal Method For Photocatalytic Dye Degradation Under Solar LightOriental Journal of Chemistry321411-14191 June 2016
24Preparation, Characterization Of Zno/cofe2o4 Magnetic Nanocomposites And Activity Evaluation Under Solar Light IrradiationJournal of Chemical and Pharmaceutical Research7139-1461 January 2015
25Synthesis Of Magnetic Nanoparticles Of Tio2-nife2o4: Characterization And Photocatalytic Activity On Degradation Of Rhodamine BIndonesian Journal of Chemistry12229-2341 January 2012
26The Effect Of Temperature On The Synthesis And Characterization Of Hydroxyapatite-polyethylene Glycol Composites By In-situ ProcessHybrid Advances2-1 April 2023
27La3+ Doped Znfe2o4 Synthesized Via Green Chemistry Approach Using Uncaria Gambir Roxb: A Study On Structural, Optical, Magnetic, And Photocatalytic PropertiesJournal of Photochemistry and Photobiology A Chemistry461-1 April 2025
28Anticorrosive Effectiveness Of Mild Steel By Dragon Scale Fern (drymoglossum Piloselloides L.) Leaf Extract In Hydrochloric Acid Medium: A Combined Experimental And Computational ApproachInternational Journal of Corrosion and Scale Inhibition14566-5881 January 2025
29Magnetic Nanocomposite Of Hydroxyapatite/codoped Znfe2o4 Synthesized By Green Technology: Structure, Character, And ApplicationFaculty of Engineering, Universitas Indonesia16.01682-169922 September 2025
30Gel Serum Formulation That Contain Nanogold And Chitosan Oligosacharides As AntioxidantsAIP Conference Proceedings/American Institute of Physics3195.01-1814 November 2025
31 Formulation Of Serum Containing Nanogold And Carboxymethyl Chitosan As Anti AgingAIP Conference Proceedings/American Institute of Physics3195.0020017-1–020017-1814 November 2025
32Enhanced Photocatalytic Cr(vi) Reduction Using Hydroxyapatite/ La3+-doped Znfe2o4 Nanocomposites With Optimized Structural And Surface PropertiesJournal of Photochemistry & Photobiology, A: Chemistry474.011 May 2026
33Optical, Dielectric And Magnetic Properties Of Cdxzn1-xfe2o4 Synthesized By Hydrothermal Method Using Uncaria Gambir Extract As Capping Agent(not set)28.01-1330 September 2025
Publikasi WoS
#JudulNama JurnalHalamanTahunDikutip
No results found.
Publikasi GS
#JudulNama JurnalDikutip
1Pemanfaatan Ekstrak Daun Sirih Hijau (piper Betle Linn.) Sebagai Capping Agent Dalam Green Synthesis Spinel Ferit Znfe2o4 Untuk Remediasi Fenol Dalam Air Dan Sebagai Anti BakteriJurnal Riset Kimia 15 (1), 73-88, 20240
2Optical Response Of Srtio 3 Thin Films Grown Via A Sol-gel-hydrothermal MethodChimica Techno Acta 10 (1), 202310108, 20233
3A New Combination Method Of N-doped Tio2 Nanoparticles Synthesis For Heavy Metal Ions Cr (vi) Photoreduction ApplicationsJurnal Kimia Sains dan Aplikasi 26 (2), 70-78, 20232
4Bimbingan Dan Pelatihan Fermentasi Pakan Untuk Budidaya Ikan Lele Dengan Probiotik Sebagai Upaya Peningkatan Hasil Produksi Masyarakat Di Koto Luar, Kecamatan Pauh, PadangWarta Pengabdian Andalas 30 (1), 40-46, 20231
5The Improvement Of Indigo Carmine Dye Adsorption By Terminalia Catappa Shell Modified With Broiler Egg WhiteBiomass Conversion and Biorefinery, 1-18, 202228
6Tuning The Structural, Magnetic, And Optical Properties Of Zno/nife2o4 Heterojunction Photocatalyst For Simultaneous Photodegradation Of Rhodamine B And Methylene Blue Under …Environmental Engineering Research, 20220
7Effect Of Thermal Treatment And Nickel-salt Modification On The Catalytic Performance Of The Illite-kaolinite Clay From Bukittinggi Of West Sumatra In Palm Oil TransesterificationHerald of the Bauman Moscow State Technical University, Series natural …, 20225
8Magnetic Particles Nanorod Of Zno/cufe2o4 Prepared By Green Synthesized Approach: Structural, Optical And Magnetic Properties, And Photocatalytic ActivityMaterials Research 25 (e20210164), 1-11, 202210
9Tuning The Structural, Magnetic, And Optical Properties Of Zno/nife2o4 Heterojunction Photocatalyst For Simultaneous Photodegradation Of Rhodamine B And …Environmental Engineering Research 28 (3), 220074, 202210
10The Use Of Tio2/zeolite To Reduce The Concentration Of Nitrate, Nitrite, Ammoniac, Phosphate, Bod, Cod And Ph In Agricultural Waste Water PhotolysisJurnal Katalisator 7 (2), 277-297, 20220
11Cufe204/hydroxyapatite Magnetic Nanocomposites: Synthesis, Characterization, And ActivitiessThe 3 rd International conference on chemistry aand science education …, 20220
12Nife204 Hydroxyapatite Nanocomposite Synthesized Using Pensi Shells (cobicula Moltkiana) As Hydroxyapatite Raw Material And Its ActivityThe joint conference on research in chemistry and chemical education, 20220
13Terminalia Catappa Shell As Low-cost Biosorbent For The Removal Of Methylene Blue From Aqueous SolutionsJournal of Industrial and Engineering Chemistry 97, 188-199, 2021184
14Simbang Darah (iresine Herbstii) Extract Mediated Hydrothermal Method In The Synthesis Of Zinc Ferrite Spinel Nanoparticles Used For Photocatalysis And Antibacterial ApplicationsJournal of Environmental Chemical Engineering 9 (2), 105140, 202122
15Spinel Ferrite Of Mnfe2o4 Synthesized In Piper Betle Linn Extract Media And Its Application As Photocatalysts And AntibacterialJournal of Dispersion Science and Technology 42 (3), 465-474, 202149
16Effectiveness And Efficiency Between Cuo/natural Zeolite Catalysts And Zno/natural Zeolite In Naphthol Blue–black Waste Management By Photolysis Degradation MethodDesalination and Water Treatment 226, 400-407, 20214
17Photolysis Of Naphthol Blue-black From Kubang Weaving Waste Using Tio2/zeolite As A CatalystRasayan Journal of Chemistry 14 (2), 1247-1254, 20210
18Pemanfaatan Limbah Tandan Kelapa Sawit Sebagai Sumber Karbon Untuk Sintesis Materila Kompositmagnetik Cufe2o4/c Aktif Dan Uji AktivitasnyaKomprensi nasional dan hilirisasi riset berkelanjutan (KN-KHRB) VII 2021, 20210
19Zno/nife2o4 Nanocomposite Photocatalysts: Synthesis, Structure, Magnetic And Optical PropertiesInternational conference of the indonesian chemichal society, Lombok Indonesia, 20210
20Mangifera Odorata Griff Seed Extract As Corrosion Inhibitor Of Mild Steel In Hydrochloric Acid MediumRasayan Journal of Chemistry 13 (1), 230 - 239, 202018
21The Fast And Of Low-cost-adsorbent To The Removal Of Cationic And Anionic Dye Using Chicken Eggshell With Its MembraneMediterranean Journal of Chemistry 10 (3), 296-301, 202026
22Synthesis Of Zno/znfe2o4 Nanocomposites In Organic Free Media And Their Photocatalytic Activity Under Natural SunlightJournal Of Mechanical Engineering And Sciences 14 (2), 6801-6810, 20204
23Biosorption Of Indigo Carmine From Aqueous Solution By Terminalia Catappa ShellJournal of Environmental Chemical Engineering 8 (5), 104290, 2020129
24Zinc Ferrite Nanoparticles Synthesized Via Hydrothermal Method Using Simbang Darah Extract As Capping Agent And Their Activities4th International Seminar on Chemistry (ISOC), 20200
25Utilization Of Natural Zeolite Clipnotilolit-ca As A Support Of Zno Catalyst For Congo-red Degradation And Congo-red Waste Applications With Photolysis.-0
26Green Synthesis And Characterization Of Zno-cofe2o4 Semiconductor Photocatalysts Prepared Using Rambutan (nephelium Lappaceum L.) Peel Extract-0
27Green Synthesis Of Nife2o4 Spinel Ferrites Magnetic In The Presence Of Hibiscus Rosa-sinensis Leaves Extract: Morphology, Structure And ActivityRasayan Journal of Chemistry 12 (4), 1942 - 1949, 201914
28A., Stiadi, Y., Lee, Hj, Zulhadjri, 2019. Green Synthesis And Characterization Of Zno-cofe2o4 Semiconductor Photocatalysts Prepared Using Rambutan (nephelium Lappaceum L.) Peel …Mater. Res 22, 1-11, 20197
29Utilization Of Natural Zeolite Clinoptilolite-ca As A Support Of Zno Catalyst For Congo-red Degradation And Congo-red Waste Applications With PhotolysisORIENTAL JOURNAL OF CHEMISTRY 34 (India), 887-893, 201812
30Utilization Of Natural Zeolite Clipnotilolit-ca As A Support Of Zno Catalyst For Congo-red Degradation And Congo-red Waste Applications With Photolysis.-0
31Utilization Natural Zeolyte From West Sumatera For Tio2 Support In Degradation Of Congo Red And A Waste Simulation By PhotolysisDer Pharmacia Lettre 9 (5), 1-10, 201714
32Comparison Of Sol-gel And Hydrothermal Synthesis Of Zinc Ferrite (znfe2o4) Nanoparticles.Research Journal of Pharmaceutical, Biological and Chemical Sciences 8 (1 …, 20171
33Photocatalytic Performance Of Zno-znfe 2 O 4 Magnetic Nanocomposites On Degradation Of Congo Red Dye Under Solar Light IrradiationJ. Mater. Environ. Sci 8 (5), 1634-1643, 201715
34Magnetically Separable Zno-mnfe2o4 Nanocomposites Synthesized In Organic-free Media For Dye Degradation Under Natural SunlightOriental Journal of Chemistry 33 (6), 2758, 201721
35Semikonduktor Komposit Magnetik Zno-mfe2o4: Sintesis, Karakterisasi Dan Uji Aktivitas Fotokatalitik Terhadap Degradasi Zat Warna Dalam Air Di Bawah Sinar MatahariUniversitas Andalas, 20170
36Senyawa Aurivillius Sr1-xbi3+ Xndti4-xmnxo15: Sintesis, Struktur, Dan Sifat DielektrikSEMIRATA 2015, 20160
37Synthesis Of Zno-nife2o4 Magnetic Nanocomposites By Simple Solvothermal Method For Photocatalytic Dye Degradation Under Solar LightOriental Journal of Chemistry 32 (3), 1411, 201622
38Pembuatan Dan Karakterisasi Nanokomposit Mfe2o4 Dan Mfe2o4-sio2 (m= Cu, Ni)Jurnal Riset Kimia 4 (1), 55, 20150
39Sintesis, Karakterisasi, Dan Uji Aktifitas Fotokatalitik Nanopartikel Magnetik Tio2-cofe2o4Jurnal Riset Kimia 4 (2), 71, 20150
40Preparation, Characterization Of Zno/cofe2o4 Magnetic Nanocomposites And Activity Evaluation Under Solar Light IrradiationJournal of Chemical and Pharmaceutical Research 7 (9S), 139-146, 20159
41Degradasi Rhodamin B Secara Fotokatalisis Dan Ozonolisis Dengan Penambahan Tio2-nife2o4, Tio2-cufe2o4, Dan Tio2-mnfe2o4J. Ris. Kim. 7 (UNAND), ISSN : 1978-628X, 20143
42Fotokatalis Komposit Magnetik Tio2-mnfe2o4Prosiding SEMIRATA 2013 1 (1), 20132
43Sintesis, Karakterisasi Dan Uji Aktifitas Fotokatalitik Nanokomposit Tio2-znfe2o4Jurnal Kimia Unand 2 (3), 2303-3401, 20130
44Pembuaran Material Komposit Kitin-kitosan Dari Limbah Kulit UdangSeminar Nasional Kimia dan Pendidikan Kimia HKI Cabang Sumbar, Padang 1 …, 20130
45Synthesis Of Magnetic Nanoparticles Of Tio2-nife2o4: Characterization And Photocatalytic Activity On Degradation Of Rhodamine BIndonesian journal of chemistry 12 (3), 229-234, 201220
46Synthesis Of Magnetic Nanoparticles Of Ti0₂-nife₂0₄: Characterization And Photocatalytic Activity On Degradation Of Rhodamine BIndonesian Journal of Chemistry 12 (2012), 20120
47Pembuatan Dan Karakterisasi Nanokomposit Mfe2o4 Dan Mfe2o4-sio2 (m= Cu, Ni)Jurnal Riset Kimia 4 (1), 55-55, 20100
48Guidance And Training On Feed Fermentation For Cultivating Catfish With Probiotics As An Effort To Increase Community Production In Koto Luar, Pauh District, Padang.-0
Paten/HKI
#KategoriJudulPemegang Hak PatenTanggal PublikasiNomor Publikasi
1Paten SederhanaPenggunaan Cangkang Kerang Pensi Sebagai Sumber Kalsium Dalam Pembuatan Nanokomposit Hidroksiapatit-cufe2o4LPPM Universitas Andalas2023-10-22S00202310784
2Hak CiptaKimia Anorganik 1LPPM Universitas Andalas2023-12-19EC002023135221
3Paten SederhanaSintesis Komposit Magnetik Zno-cofe2o4 Dalam Media Bebas Organik Sebagai FotokatalisLPPM Universitas Andalas0000-00-00