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Kaolinite Nanotubes as Support Catalysts of Sulfuric Acid (H2SO4) for Transesterification Reaction of Waste Cooking Oil into Methyl Ester for Biodiesel Fitri, Ernarisa; Rahadian Zainul; Syukri
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 02 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss02/577

Abstract

This study aims to improve the catalytic performance of kaolinite by converting it into kaolinite nanotubes and utilizing it as a support for sulfuric acid catalysts. Analysis using XRD and TEM revealed that the kaolinite crystal phase remained stable after being modified with sulfuric acid, while kaolinite nanotubes underwent little structural change. In addition, characterization via FTIR and XRF confirmed the presence of sulfate ions in kaolinite nanotubes and kaolinite after combination with sulfuric acid. Catalytic test on transesterification of used cooking oil under uniform conditions (catalyst 3% w/v, oil to methanol ratio 1:6, temperature 90 °C, and stirring speed 700 rpm) showed that sulfuric acid supported by kaolinite nanotubes gave the best performance, producing methyl ester of 65.01%. These findings indicate that converting kaolinite into nanotubes significantly improves its performance as a catalyst support. Practically, this increase in catalytic activity contributes to the efficiency of used cooking oil-based biodiesel production, which can reduce dependence on virgin vegetable oil raw materials and support waste oil recycling efforts. In addition, the use of cheap and easily available kaolinite-based catalysts can reduce the cost of biodiesel production, making it more competitive as an environmentally friendly fuel.
ANALISIS KETERAMPILAN BERPIKIR KRITIS DALAM PEMBELAJARAN IPA SISWA SEKOLAH MENENGAH PERTAMA DI KOTA SUNGAI PENUH Revi Gina Gunawan; Festiyed; Rahadian Zainul; Lufri; Skunda Diliarosta; Rilla Gina Gunawan; Riko Romas Prayuda; Seprianto
EDU RESEARCH Vol 5 No 3 (2024): EDU RESEARCH
Publisher : IICLS (Indonesian Institute for Corporate Learning and Studies)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47827/jer.v5i3.562

Abstract

In the current educational landscape, critical thinking is an essential skill that significantly aids students in addressing problems effectively. This skill encompasses various aspects such as interpretation, analysis, evaluation, inference, explanation, and self-regulation. The aim of this study is to evaluate the critical thinking abilities of seventh-grade students in Sungai Penuh City, with a specific focus on SMPN 8 and SMPN 11. A total of 60 students from both schools participated in this study, which centered around science education (IPA). A descriptive quantitative method was used, with data collected through essay-based assessments designed around critical thinking indicators. The research results revealed that students from SMPN 8 demonstrated superior critical thinking skills compared to their peers at SMPN 11, with an average achievement score of 46.07% (moderate category) at SMPN 8 and 28.13% (low category) at SMPN 11. The main weaknesses identified were in the areas of analysis and inference, particularly at SMPN 11, where most indicators were classified as low. These findings underscore the challenges present in the learning process, including teaching methods, student motivation, and the learning environment. Therefore, more effective teaching strategies are needed to enhance students' critical thinking abilities, particularly in science education.
Trend Riset Keteknikan Di Era New Normal: Peluang Dan Tantangan Rahadian Zainul
Prosiding Vol 4 (2022): SNISTEK
Publisher : LPPM Universitas Putera Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dilakukan kajian analisis tren perkembangan riset dan penelitian di bidang keteknikan selama masa pandemi Covid 19 dan masa New Normal. Kajian ini bertujuan untuk mengetahui perkembangan jumlah publikasi internasional di bidang keteknikan, mengetahui tren publikasi keteknikan yang dilakukan selama masa pandemi Covid 19 serta mengetahui tantangan dan peluang riset keteknikan untuk kedepannya. Pengumpulan data dilakukan dengan cara kajian beberapa literatur yang terkait dengan tren riset keteknikan kemudian dilakukan juga penelusuran terkait statistika perkembangan publikasi yang dilakukan peneliti-peneliti bidang teknik melalui Scopus dan Scimago dengan kata kunci engineering dengan kategori , judul artikel, abstrak dan kata kunci dalam kurun waktu 2020-2021. Data berupa jumlah publikasi pertahun, jurnal yang memuat artikel bidang engineering dianalisis menggunakan Microsoft Excel 2010. Sedangkan untuk trend perkembangan riset keteknikan dianalisis melalui kajian literatur dan data statistik dari website Scimago. Hasil penelitian menunjukkan bahwa perkembangan riset bidang keteknikan tahun 2020 yang terindeks Scopus mencapai 383234 publikasi. Publikasi internasional bidang engineering terbanyak dipublikasi pada jurnal Nature Biotechnology dengan total publikasi sebanyak 366. Sedangkan untuk bidang engineering yang paling banyak dilakukan publikasi yakni bidang electrical and electronic engineering sebanyak 226246 publikasi, kemudian bidang engineering (miscellaneous) sebanyak 130393 publikasi dan bidang mechanical engineering sebanyak 130050 publikasi. Untuk tren perekmbangan riset keteknikan yang banyak diminati selama tahun 2020-2021 lebih banyak melakukan kolaborasi dengan bidang medical guna membantu mengatasi masalah Covid 19.
Penelitian-Penelitian Dari Ranah Teknik Untuk Meningkatkan Kualitas Sumber Daya Manusia melalui Inovasi Penelitian dan Pengabdian kepada Masyarakat Rahadian Zainul
Prosiding Vol 5 (2023): SNISTEK
Publisher : LPPM Universitas Putera Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33884/psnistek.v5i.8055

Abstract

It is hoped that increasing economic growth can be directed at increasing public income and meeting daily needs. The aim of this research is to determine the influence of service quality variables (X1), price (X2), and promotion (X3) on purchasing decisions at PT Asia Paramita Indah Batam (Y). In this research, the sampling process was carried out using a non-probability sampling method, namely a sampling technique that does not provide an equal opportunity to be selected into the sample. For sampling, the author used a saturated sampling method. Based on the sampling technique above, using a saturated sampling method from a total population of 135 people, 135 people were taken as a sample. Data was collected using a questionnaire which was measured using a Likert scale. This research uses multiple linear regression analysis with the help of the SPSS version 20.0 program. The results of this research show that the variables service quality (X1), price (X2), and promotion (X3) simultaneously influence purchasing decisions at PT Asia Paramita Indah Batam. The variables service quality (X1), price (X2), and promotion (X3) partially influence purchasing decisions at PT Asia Paramita Indah Batam.
PENGEMBANGAN MODUL INTERAKTIF PADA MATERI STRUKTUR ATOM DALAM MENDUKUNG PEMBELAJARAN BERDIFERENSIASI MENGGUNAKAN FLIP PDF CORPORATE Butarbutar, Suryani; Zainul, Rahadian
BIOCHEPHY: Journal of Science Education Vol. 5 No. 1 (2025)
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/biochephy.v5i1.1608

Abstract

Rendahnya pemahaman peserta didik terhadap materi struktur atom, yang merupakan salah satu kompetensi penting dalam pembelajaran kimia, menjadi latar belakang pengembangan media pembelajaran yang berdiferensiasi dan interaktif. Penelitian ini bertujuan untuk mengembangkan serta menguji kevalidan dan kepraktisan Modul Interaktif Struktur Atom berbasis pembelajaran berdiferensiasi dengan memanfaatkan platform Flip PDF Corporate. Modul dirancang untuk peserta didik fase E dengan memperhatikan perbedaan gaya belajar, yaitu visual, auditori, dan audio-visual, melalui penyajian materi dalam bentuk teks, gambar, audio, dan video animasi. Model pengembangan yang digunakan adalah 4D (Define, Design, Develop, Disseminate). Subjek penelitian melibatkan 35 peserta didik, tiga dosen kimia dari Universitas Negeri Padang, dan dua guru kimia SMA Negeri 1 Laguboti. Hasil validasi menunjukkan bahwa modul ini memiliki tingkat kevalidan sebesar 0,92 (kategori sangat valid), serta nilai kepraktisan sebesar 95,60% (kategori sangat praktis), sehingga layak digunakan dalam pembelajaran kimia di SMA.
PENGEMBANGAN E-LKPD BERBASIS PBL PADA MATERI TERMOKIMIA UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS PESERTA DIDIK KELAS XI FASE F SMA/MA Hidayati, Shil; Zainul, Rahadian
BIOCHEPHY: Journal of Science Education Vol. 5 No. 1 (2025)
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/biochephy.v5i1.1609

Abstract

Penelitian pengembangan ini telah menghasilkan bahan ajar berupa E-LKPD berbasis Problem Based Learning (PBL) pada materi termokimia untuk Fase F di SMA/MA. Penelitian pengembangan E-LKPD ini menggunakan metode R&D (Research and Development) dengan model 4-D. Model 4-D ini terdiri dari 4 tahapan, yaitu: (1) define (pendefinisian), (2) design (perancangan), (3) develop (pengembangan), dan (4) disseminate (penyebaran). Namun, tahap pengembangan ini hanya dilakukan sampai tahap develop (pengembangan). Hasil pengembangan bahan ajar yang telah dirancang kemudian diuji validitas dan kepraktisannya untuk memenuhi kriteria sebagai sebuah E-LKPD. Instrumen yang digunakan yaitu lembar validasi yang terdiri dari komponen isi, komponen penyajian, komponen kebahasaan, komponen kegrafikan dan aspek program. Validasi dilakukan oleh 5 orang validator yang terdiri dari dosen kimia FMIPA UNP dan 2 guru kimia SMAN 9 Padang. Pengujian validasi mengunakan rumus Aiken’s V. Uji kepraktisan dilakukan oleh 2 guru kimia dan 8 peserta didik SMAN 9 Padang. Pengujian ini menggunakan rumus modifikasi Purwanto. Berdasarkan hasil analisis, validasi E-LKPD sebesar 0,86 dengan kategori valid, sedangkan praktikalitas E-LKPD sebesar 93% dengan kategori sangat praktis baik nilai yang diberikan guru dan peserta didik.
Land Cover Classification of Indonesian Archipelago Using Digital Spectroscopy to Support Spatial Planning in Indonesia Pamungkas, Guntur Bagus; Firmansyah, Muhammad Reffi; Sari, Ratna; Tamara, Anindya Putri; Zainul, Rahadian
Geoplanning: Journal of Geomatics and Planning Vol 12, No 1 (2025)
Publisher : Department of Urban and Regional Planning, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/geoplanning.12.1.57-68

Abstract

In the context of urban and regional planning, this study aims to produce land classification products covering 230 paths/rows throughout Indonesia, which can serve as an important tool in supporting planning and research projects. The research method used combines remote sensing in Geographic Information Systems (GIS) with the utilization of spectroscopy through QGIS software with Dzetsaka plugins (semi-automatic classification tools). Land cover classifications, which include water bodies, vegetation canopies, green open spaces, bare grounds, settlements, and built-up areas, as well as additional classifications of cloud cover, provide a comprehensive overview of land conditions in Indonesia. Based on the results of the study, the average distribution of land classes reached 10,116. The standard deviation was 14,786, which shows the level of variation in the data against the average value, with the higher value indicating the most significant variation in land classification. This study offers a more potential alternative by using Landsat 8 OLI 2022 satellite imagery data from the USGS as a basis for a more in-depth and accurate analysis of land classification. Thus, the results of this study not only contribute to mapping and understanding land use in Indonesia but also provide useful tools for supporting natural resource planning and management, as well as infrastructure development and sustainable development policies in Indonesia
Optimization of Photovoltaic Cells Using Copper-Aluminium Electrodes and Magnesium Sulfate-Based Gel Electrolytes Yanni, Fitri; Rahadian Zainul
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 02 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss02/573

Abstract

Photovoltaic cells are devices that can convert sunlight energy into electrical energy by applying the photovoltaic principle. Indonesia is a country located on the equator that receives a lot of sunlight every year. However, so far the source of electrical energy comes from fossil fuels whose availability is limited. So a material is needed that can improve the performance of photovoltaic cells in producing electrical energy. The purpose of this study was to review the advantages of using Cu-Al electrodes and MgSO4 electrolytes and to find factors that affect the efficiency or performance of photovoltaic cells. This article includes references to articles from 2018 to 2025. The results showed that the use of Cu-Al electrodes and MgSO4 electrolytes can increase cell efficiency. In addition, Cu-Al and MgSO4 are materials that are easy to find and cheap so that they can reduce the cost of making photovoltaic cells compared to other conventional materials that have quite high prices. It is hoped that researchers can utilize this material considering that it has great potential to produce energy in future life.
Test of Fat Content in Flaxseed Sticks Using the Soxhlet Extraction Method: Uji Kadar Lemak pada Stik Biji Rami Menggunakan Metode Ekstraksi Soxhlet Sofia; Amran, Ali; Zainul, Rahadian
Jurnal Kimia dan Rekayasa Vol. 6 No. 1 (2025): Jurnal Kimia dan Rekayasa Edisi Juli 2025
Publisher : Program Studi S1 Teknik Kimia, Fakultas Teknik, Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this study was to determine the fat content in flaxseed sticks using the soxhlet extraction method. Flaxseed is a plant that has many nutrients, including fat, protein, minerals, omega-3 fatty acids and so on. The many nutrients make flaxseed an alternative ingredient for food products such as snacks. Fat content testing is carried out because consuming foods that contain a lot of fat has a negative impact on health. The soxhlet extraction method is used starting with hydrolysis. After that, the sample is cleaned, dried, and extracted using n-hexane solvent. According to the SNI 2886:2015 standard for extrudate snacks, the analysis process is carried out. To test the precision, the study was carried out in duplicate. The fat content was calculated by gravimetry using the difference in flask mass. The results showed that each test had a fat content of 18,44% and 18,51%, with an average value of 18,48% and an RPD value of 0,3%, which met the maximum accuracy requirements of RPD <= 5%. In addition, the research results showed that the fat content of flaxseed sticks was far below the maximum fat content limit for extrudate snacks set by SNI, which is 38%. AbstrakTujuan penelitian ini adalah untuk mengetahui kadar lemak dalam stik biji rami dengan menggunakan metode ekstraksi soxhlet. Biji rami adalah tanaman yang memiliki banyak nutrisi, termasuk lemak, protein, mineral, asam lemak omega-3 dan sebagainya. Banyaknya nutrisi yang terkandung menjadikan biji rami sebagai bahan alternatif produk pangan seperti makanan ringan. Pengujian kadar lemak perlu dilakukan karena mengonsumsi makanan yang mengandung banyak lemak dapat berdampak buruk pada kesehatan. Metode ekstraksi soxhlet digunakan untuk mengukur kadar lemak, yang dimulai dengan tahap hidrolisis. Setelah itu, sampel dibersihkan, dikeringkan, dan diekstrak menggunakan pelarut n-heksana. Sesuai dengan standar SNI 2886:2015 untuk makanan ringan ekstrudat, proses analisis dilakukan. Untuk menguji presisi, penelitian dilakukan secara duplo. Kadar lemak dihitung dengan gravimetri menggunakan perbedaan massa labu sebelum dan sesudah ekstraksi. Hasil penelitian menunjukkan bahwa masing-masing pengujian memiliki kadar lemak 18,44% dan 18,51%, dengan nilai rata-rata 18,48% dan nilai RPD 0,3%, yang memenuhi syarat ketelitian maksimal RPD <= 5%. Selain itu, hasil penelitian menunjukkan bahwa kadar lemak stik biji rami jauh di bawah batas maksimum kadar lemak makanan ringan ekstrudat yang ditetapkan oleh SNI, yaitu 38%. 
A bioinformatics approach to design a novel epitope-based vaccine against Simian Immunodeficiency Virus (Retroviridae: Lentivirus) Dhea Kharisma, Viol; Ansori, Arif Nur Muhammad; Ullah, Md. Emdad; Dings, Tim Godefridus Antonius; Probojati, Rasyadan Taufiq; Fadholly, Amaq; Turista, Dora Dayu Rahma; Tacharina, Martia Rani; Zainul, Rahadian
Genbinesia Journal of Biology Vol. 2 No. 1 (2022): November 2022
Publisher : Generasi Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55655/genbinesia.v2i1.26

Abstract

Simian Immunodeficiency Viruses (SIV) have been found to naturally infect African nonhuman primates (NHP). This causative agents are important and one of the special interest as the root cause of the HIV/AIDS pandemic, one of the most threatening infectious diseases worldwide. The aim of this study was to design an epitope-based vaccine using bioinformatics approaches of the circulating SIV in Kenya, Africa. In this study, we used 17 partial SIV envelope glycoprotein genes retrieved from GenBank® (National Center for Biotechnology Information, USA). We analysed the candidate epitopes using the Immune Epitope Database and Analysis Resource. Then, we performed the protective antigens prediction usingVaxiJen. Interestingly, this study revealed the data of B cell epitope prediction, protective antigens prediction, and molecular phylogenetic of circulating SIV in Kenya, Africa. In sum, this study can be used to design a novel epitope-based vaccine against SIV. We suggest further studies to conduct confirmatory experiments (in vitro and in vivo).
Co-Authors -, Bahrizal Adi Sofyan Ansori, Muhammad Admin Alif Afria Yolanda Agil Aditya Dinata Agustina, Niken Ahmad Fauzi Ahmad Maulana Ardi Ahmed, Shafique Aini, Syamsi Alfian, Fariz R. Ali Amran Alif, Admin Alifiansyah, Mochamad RT. Alizar Alyaa Farrah Dibha Amanda, Adittya Amaq Fadholly Ananda Putra Andini, Namira Tri Andre Juliano, Muhammad Andromeda Andromeda Andromeda Anggraini, Dhea Anggriani Sirait, Nova Anni Faridah Ansori, Arif NM. Antonius, Yulanda Arif Nur Muhammad Ansori Ariusni Ariusni Ariusni Elida Arli Aditya Parikesit Artha, Dwirani Puspa Asnil Asnil Asral, Suci Sukma Taruna Atmaja, Peter Y. Aulia, Halimatus S. B, Syamsul Amar Baharudin, Muhammad Daswar A. Bahrizal - Bambang Sudarmanta Bonkalo, Tatyana Budhi Oktavia Budhi Oktavia Burkov, Pavel Butarbutar, Suryani Cika Dania Marca Deandra Savira Delsya Helvira Suci Derkho, Marina Deski Beri Desy Kurniawati Desy Kurniawati Devi Purnamasari Dhea Kharisma, Viol Dian, Farida Aryani Dinda Sahara Dings, Tim Godefridus Antonius Dony Novaliendry Dony Novaliendry Dori Yuvenda Durain Parmanoan Durry, Fara D. Dwi Finna Syolendra Edi Nasra Efran Ustia Rahmad Elfianah, Verah elida elida Elkhool, Tarek A. Ellizar ellizar Elvina Elvina Erdiwansyah Erdiwansyah Erwandri, Rianovriani Ethica, Stalis N. Ezi Anggraini Fadila Gusman Fajriah Azra Fauzan Yan Hawari Feriani, Feby Festiyed Fetty, Amelia JT. Firmansyah Khairul Kamal Firmansyah, Muhammad Reffi Fitrah Mey Harmi Siregar Fitrah Mey Harmi Siregar Fitri, Ernarisa Fredy Kurniawan Ghoury Kharisma Anjali Goh, Khang Wen Guntur Bagus Pamungkas Hardeli Hardeli Hardeli Hary Sanjaya Hayaza, Suhaila Herdiansyah, Mochammad A. Hermansyah Aziz Hery Purnobasuki Hidayati, Shil Hidayatul Husna ike sabaria Ike Yusrianti Illyas Md. Isa Indah Permata Sari Indah Permata Sari Indang Dewata Intan Anika Putri Irda Yunita Isa, Illyas Md Isabellinda Istiqamah, Siti Sarah Jakhmola, Vikash Jakmola, Vikash Jamaluddin, Indra P. Jamaludin Jamaludin Kadek Rachmawati Karlinda Karlinda Karlinda Karlinda Khairun Nisa Khairunnisa Khairunnisa Khalid, Ahmad Khudzairi Kharisma, Viol D. Kharisma, Viol Dhea Kovalchuk, Dmitriy F. Krismadinata Krismadinata Lubis, Amalia Putri Lufri Lufri Ma'firah, Marla Maahury, Mirella Fonda Maifil Dwi Andrean Maiti Faddila Maksim Rebezov Maksimiuk, Nikolai Mardi Mardi Maria Kiseleva Marla Ma&#039;firah Meksim Rebezov Muhammad Andre Juliano Muhammad Haris Effendi Hasibuan Muhammad Hermawan Widyananda Muhammad Nizar Muhammad Rizki Muhammad Rusdi Muhardi, - Muji Setiyo Mulia, Melindra Murtadlo, Ahmad AA. Murtadlo, Ahmad Affan Ali Musa, Susan H. Nadezhda Kenijz Nafika Nurullita Naw, Sin W. Nizar, Umar Kalmar Novela, Riana Novera Elsi Mudia Oki Muraza Oktarina, Cindy Parikesit, Arli A. Pera Meilita Pernadi, Niza Lian Pratiwi, Intan A. Putra, Abrar Suryadi Putra, Ananda Putra, Justitia ERP. Putra, Randi Purnama Putri Fatimah Qonitah Fardiyah Radeni Sukma Indra Dewi Rahma yulis lubis Rahma Zila Rahmatika Putri, Sinta Rahmi, Maulidia Arsyta Ramli Ramli Rasyadan Taufiq Probojati Ratna Sari Raudhatul Hanifa Rayandra Asyhar Rebezov, Maksim Regina Tutik Padmaningrum Remon Lapisa Revi Gina Gunawan Riga Riga Oktry Silpa Rijas, Livia Putrima Riko Romas Prayuda Rilla Gina Gunawan Risky Setiawan Risty, Chika Mei Rizaldy, Rafli Rohadatul Nadya Maurani Roza Herlina Saklani, Taru Salsabila Tri Rahmi Sari Mustika Sari, Putri Manda Sari, Yollit Permata Scherbakov, Pavel Sepiashvili, Ekaterina Seprianto Setianingsih, Primanita NM. Shmeleva, Svetlana Siltiwi Mandar Sinta Rahmatika Sinta Rahmatika Putri Skunda Diliarosta Sofia Sri Rizki Putri Primandari Sri Ulfa Sentosa Sri Wahyu Wardani Sri Wahyuningsih Sri Whayu Wardani Suci Sukma Taruna Asral Sukma Sahadewa, Sukma Sunarto Sunarto Sunarto Sunarto Susilo, Raden JK. Suyanta Suyanta Svetlana Artyukhova Syafiqoh, Iffat Syaifuddin Yana Syamsi Aini Syifa Rahma Ayunda Syukri Syukri - Syukri Arief Tacharina, Martia Rani Tafonao, Leni Anggraeni Tamara, Anindya Putri Tarek Elkhooly Teguh Hari Sucipto, Teguh Hari Tri Haryati Trihanto Setiadi Trisna Kumala Sari Turista, Dora Dayu Rahma Ullah, Md. Emdad Umar Kalmar Nizar Urmatul Uska Akbar Veneliza, Adila Vika Erlina Vikash Jakhmola Vikash Jakhmola Viol Dhea Kharisma Visca Alisia Arianti Visca Alisia Arianti Yanni, Fitri Yeni, Isra Yohandri Yosephi, Valensa Yulia Matrosova Yulia Mona Liza Yuni Aulia Putri Djasli