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All Journal Reaktor Eksergi: Chemical Engineering Journal JURNAL INTEGRASI PROSES Teknika: Jurnal Sains dan Teknologi Jurnal Ilmiah Universitas Batanghari Jambi Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Abdimasku : Jurnal Pengabdian Masyarakat Jurnal Inovasi Pembangunan Jurnal Teknik Kimia dan Lingkungan Jurnal Pengabdian Masyarakat Bangsa Jurnal Teknologi Lingkungan Communication in Food Science and Technology Journal Of Chemical Process Engineering

Andri Sanjaya

Chemical Engineering Department, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Lampung Selatan 35365, Indonesia

Author-ID : 6003785

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PENGARUH LAMA PERENDAMAN, KONSENTRASI DAN JENIS PELARUT TERHADAP ANTOSIANIN DARI EKSTRAK BUNGA TELANG (CLITORIA TERNATEA) Desi Riana Saputri; Yuniar Luthfia Listyadevi; Damayanti Damayanti; Wika Atroauriyani; Yunita Fahni; Andri Sanjaya; Fidel Abdiman Zega; Fikri Rahmatul Ikhlas
JURNAL INTEGRASI PROSES Vol 12, No 1 (2023)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v12i1.19888

Bunga telang (Clitoria ternatea) merupakan jenis tanaman di Indonesia yang sedang dikembangkan manfaat kandungan senyawa antosianinnya sebagai antioksidan. Proses ekstraksi untuk mendapatkan antosianin dari ekstrak bunga telang membutuhkan beberapa variasi dari segi penggunaan pelarutnya agar hasil optimal. Penelitian ini bertujuan untuk mempelajari pengaruh variabel lama perendaman, konsentrasi, dan jenis pelarut terhadap kandungan antosianin pada bunga telang. Proses perendaman bunga telang dilakukan selama 6, 12, dan 18 jam mengunakan pelarut etanol dengan masing-masing konsentrasi 60 dan 90%. Selanjutnya, proses penguapan pelarut dengan rotary evaporator pada suhu 60°C dengan kecepatan 50 rpm. Proses analisis senyawa dilakukan dengan menggunakan alat spektrofotometri UV-Visibel dan sampel dengan konsentrasi terbaik dianalisis menggunakan liquid chromatography-mass spectroscopy (LC-MS). Rendemen ekstrak tertinggi terdapat pada perendaman 18 jam yaitu sebesar 29, 25%b/v untuk pelarut etanol 60% dan 5%b/v untuk pelarut etil asetat 60%. Ekstrak antosianin lebih larut dengan menggunakan pelarut etanol dibandingkan etil asetat. Jenis antosianin yang teridentifikasi diindikasikan sebagai cyanidin-3-O-glucoside, Cn-3-(6”-p-coumaroylgluc-oside), Dp-3-(6”-p-coumaroylglucoside), dan delphinidin-3-O-glucoside.

SINTESIS ANTI-SARIAWAN HYDROGEL PATCH FILM DARI EKSTRAK KULIT PISANG KEPOK TERHADAP STAPHYLOCOCCUS AUREUS MENGGUNAKAN METODE ULTRASOUND ASSISTED EXTRACTION Yunita Fahni; Safira Anggarini; Ridho Ramadhan Jakop; Agriadi Dwi Nugroho Putro; Cika Amalia Shabira; Azzaima Ayu Ulisya; Desi Riana Saputri; Wika Atro Auriyani; Damayanti Damayanti; Andri Sanjaya; Ibnu Maulana Hidayatullah
JURNAL INTEGRASI PROSES Vol 13, No 2 (2024)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i2.27862

Penelitian ini mengeksplorasi potensi antibakteri dari ekstrak kulit pisang kepok (Musa spp.) terhadap bakteri Staphylococcus aureus (Sp. aureus) menggunakan metode ultrasound assisted extraction (UAE) dan mengaplikasikannya dalam bentuk patch hydrogel untuk pengobatan sariawan. Ekstrak kulit pisang kepok, yang mengandung senyawa aktif seperti flavonoid, tanin, saponin, dan fitosterol, menunjukkan aktivitas antibakteri yang signifikan terhadap Sp. aureus. Penelitian ini menemukan bahwa waktu sonikasi 50 menit mampu menghasilkan rendemen tertinggi pada ekstraksi kulit pisang kepok. Ekstrak kulit pisang kepok bekerja efektif sebagai antibakteri terhadap Sp. aureus pada konsentrasi 60-80%. Analisis GC-MS mengidentifikasi senyawa antimikroba dan antiinflamasi dalam ekstrak. Formulasi hydrogel patch film dengan ekstrak 60-80% memenuhi standar fisik dan kimia, termasuk ketahanan lipatan dan pH yang sesuai untuk penggunaan di rongga mulut, menunjukkan potensi sebagai bahan anti-sariawan.

ANALISIS EFISIENSI PERFORMA PEMBAKARAN INTERNAL PADA KERJA MESIN EMPAT LANGKAH TERHADAP PENAMBAHAN ZAT ADITIF METANOL Damayanti Damayanti; Adimas Anugrah Rivandy; Athallah Satrionindya Herlambang; Guita Normi; Putra Hidayatulloh; Veronika Viany Suswanto; Agus Slamet Riyadi; Didik Supriyadi; Desi Riana Saputri; Yunita Fahni; Andri Sanjaya; Devia Gahana Cindi Alfian; Muhammad Triyogo Adiwibowo; Dikri Uzlifah Janah; Taharuddin Taharuddin
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.24936

Cadangan minyak bumi Indonesia terus menurun sedangkan jumlah kendaraan dan kebutuhan bahan bakar di Indonesia semakin meningkat. Peningkatan jumlah kendaraan, yang mana performa pembakarannya yang kurang sempurna dapat mengakibatkan banyaknya polusi udara. Penelitian ini bertujuan untuk meningkatkan kinerja motor bakar, dan mengurangi polusi udara dari emisi gas buang dengan cara menambahkan zat aditif metanol pada bahan bakar. Analisis performa mesin yang dilakukan yaitu power, torsi, break mean effective pressure, efisiensi termal, dan specific fuel consumption, serta pengujian emisi gas buang kendaraan. Pada analisis uji performa mesin bensin, terlihat bahwa dengan penambahan metanol sebanyak 1,2%, terjadi peningkatan torsi, power, dan BMEP pada putaran 2500 rpm masing-masing sebesar 49,45%, 53,38%, dan 49,55%.

THE EFFECT OF NATURAL PRESERVATIVE EXTRACTS ON THE PHYSICOCHEMICAL AND ANTIOXIDANT ACTIVITY OF COCONUT SAP Desi Riana Saputri; Yuniar Luthfia Listyadevi; Galeh Widharma; Ratih Ainun Mardiyah; Muhammad Triyogo Adiwibowo; Wika Atro Auriyani; Yunita Fahni; Damayanti Damayanti; Andri Sanjaya; Feerzet Achmad; Deviany Deviany; Aldillah Herlambang; Edwin Rizki Safitra
JURNAL INTEGRASI PROSES Vol 13, No 2 (2024)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i2.25689

Coconut sap produced from coconut trees has a short shelf life due to contamination and undergoes natural fermentation. One way to extend the shelf life of coconut sap is by adding preservatives. This research aims to determine the effect of adding natural preservative extracts on the antioxidant value, pH, sugar, and alcohol content of coconut sap by adding natural preservatives. There are five samples: pure sap (NM); sap with sugar lime (NK); sap with sugar lime and cinnamon extract (NKM); sap with sugar lime and mango leaf extract (NDM); sap with sugar lime and noni leaf extract (NKD). The study was conducted by extracting natural preservatives, namely cinnamon extract, mango leaves extract, and noni leaves extract, using the maceration method. These natural preservative extracts were mixed with Ca(OH)2 in a 1:1 ratio and dissolved in distilled water. The mixture was then mixed with the sap. The results of the antioxidant test showed that the IC50 values of the NM, NK, NKM, NDM, and NKD samples were 52.911, 144.409, 26.043, 49.275, and 24.21 ppm, respectively. The highest pH value was found in the NK sample at 13.8, and the lowest in the NM sample at 3.8. The lowest sugar content was in the NM and NDK samples, with 10.6 and 14.6%. The highest alcohol content was found in the NK and NKD samples, with alcohol contents of 14.80% and 14.20%. This study shows that adding natural preservatives such as cinnamon, mango leaves, and noni leaves can increase the antioxidant activity of coconut sap, raise its pH, and maintain its sugar content to prevent it from being reduced to alcohol.

INFLUENCE OF SOLVENT TYPE ON PATCHOULI OIL EXTRACTION EFFICIENCY USING MICROWAVE-ASSISTED METHOD Sanjaya, Andri; Mustafa, Mustafa; Sweatenia, Elisabeth Grace; Aulia, Siti Aisyah Rahimah; Rahmawati, Disty; Valiendra, Dhanda Ahmad; Damayanti, Damayanti; Fahni, Yunita; Auriyani, Wika Atro; Saputri, Desi Riana
JURNAL INTEGRASI PROSES Vol 13, No 2 (2024)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i2.28559

Nilam (Pogostemon cablin Benth.) is an essential oil-producing plant with high economic value. Patchouli oil consists of components with a high boiling point, so it is very well used as a binding agent in the perfume industry. Patchouli oil is also used in the cosmetics and perfume industry, as well as in the food and beverage industry and the pharmaceutical industry. This study aims to determine the effect of solvent type and extraction time on the obtained patchouli oil yield and the composition of patchouli oil through gas chromatography-mass spectrometry (GC-MS) analysis. Patchouli leaves were extracted using the microwave-assisted extraction (MAE) method at 375 W microwave power with 30, 45, 60, 75, and 90-minute time variations. The solvents used in this study were hexane and ethanol with a raw material to solvent ratio of 1:15. The results showed that patchouli oil yield increased with increasing extraction time until it reached the optimum value. However, after reaching the optimum value, the yield decreased with increasing time. Patchouli oil with ethanol has the highest yield at 75 minutes of extraction time, with a yield of 28.45%, and patchouli oil with hexane has the highest yield at 45 minutes, which is 6.25%. Based on GC-MS test, patchouli oil contains patchouli alcohol, trans-caryophyllene, α-guaiene, α-patchoulene, β-patchoulene, δ-guaiene and veridiflorol. The patchouli alcohol (PA) content contained in patchouli oil with ethanol is 5.192%, while patchouli oil with hexane contains patchouli alcohol of 2.445%.

OPTIMIZATION OF REMAZOL RED DYE REMOVAL PERFORMANCE USING AEROBIC GRANULAR SLUDGE IN A SEQUENCING BATCH REACTOR Sanjaya, Andri; Achmad, Feerzet; Robianto, Bagus; Ihsan, Ahyatul; Nugroho, Andreas Dwi; Alfares, Nelson; Damayanti, Damayanti; Fahni, Yunita; Deviany, Deviany; Saputri, Desi Riana
JURNAL INTEGRASI PROSES Vol 14, No 1 (2025)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v14i1.28880

Textile wastewater pollution, mainly containing azo dyes such as Remazol Red, presents an environmental challenge in developing countries, including Indonesia. Although various wastewater treatment methods have been extensively studied, biological treatment efficiency at high dye concentrations remains challenging. In this context, aerobic granular sludge (AGS) technology in sequencing batch reactors (SBR) offers a potential solution. However, the existing knowledge gap lies in optimizing operating conditions for optimal dye degradation. This study demonstrates the use of response surface methodology (RSM) with a Box-Behnken design (BBD) to model the effects of independent variables such as aeration time, dye concentration, and COD on decolorization efficiency. Experimental results show that increasing aeration time and COD concentration significantly improve dye degradation, with an optimal decolorization value of 77% achieved at a COD concentration of 1000 mg/L and an aeration time of 24 hours. These findings imply that AGS-SBR technology can be further optimized for effective textile wastewater treatment on various industrial scales.

MICROWAVE-ASSISTED HYDRODISTILLATION EXTRACTION OF CRUDE OIL FROM ARUMANIS MANGO KERNEL (Mangifera indica L.) Rahmiyati, Lutfia; Saputri, Desi Riana; Alhanif, Misbahudin; Shifa, Naufal Brain; Akbar, Daffa Ahsanul; Auriyani, Wika Atro; Damayanti, Damayanti; Fahni, Yunita; Sanjaya, Andri; Safitra, Edwin Rizki; Adiwibowo, Muhammad Triyogo; Wicaksono, Rihardian Maulana
JURNAL INTEGRASI PROSES Vol 14, No 1 (2025)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v14i1.32306

Arumanis mango seeds (Mangifera indica L.) are generally underutilized and still considered agricultural waste. Mango seeds offer various benefits, including antioxidant properties, cholesterol-lowering effects, and natural antibiotic activity. This study aims to determine the yield of mango kernel extract, evaluate the influence of solvent type and extraction time on extraction efficiency, and identify the chemical composition of the extract. The extraction process was carried out using the microwave-assisted hydrodistillation (MAHD) at 375 watts, employing three types of solvents: ethanol, ethyl acetate, and n-hexane, with extraction times of 30, 60, and 90 minutes. The chemical composition of the extracts was analyzed using gas chromatography-mass spectrometry (GC-MS) analysis. The results showed that the highest yield was obtained using ethanol at an extraction time of 30 minutes, yielding 40.342%. Based on GC-MS analysis, in the n-hexane at a 90-minute extraction time, the most abundant fatty acid detected was butyric acid, with a retention time of 14.06 minutes and a peak area of 9.852%. Meanwhile, the most dominant compound was hydroxymethyl furfuraldehyde (HMF), which appeared at a retention time of 22.09 minutes with a peak area of 12.437%.

INFLUENCE OF SOLVENT POLARITY ON ULTRASOUND-ASSISTED EXTRACTION OF RUBBER SEED OIL: YIELD, CHEMICAL COMPOSITION, AND PHYSICOCHEMICAL CHARACTERISTICS Imalia, Calaelma Logys; Saputri, Desi Riana; Damayanti, Damayanti; Auriyani, Wika Atro; Alhanif, Misbahudin; Fahni, Yunita; Sanjaya, Andri; Achmad, Feerzet; Deviany, Deviany; Sufra, Rifqi; Safitra, Edwin Rizki; Sanjaya, Bagus Gelorawan; Sari, Dewi Kurnia
JURNAL INTEGRASI PROSES Vol 14, No 1 (2025)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v14i1.31756

Rubber seeds contain fatty acids that can be used as industrial mixtures and processed into biodiesel, soap production, and animal feed. So far, the utilization of rubber seeds has not been optimal, so rubber seeds can be processed into oil using an ultrasound-assisted extraction (UAE). The study aimed to determine the characteristics of oil from rubber seed extract, such as color, odor, and chemical compound content. In addition, the study seeks to assess the effect of solvent type (n-hexane, ethyl acetate, and ethanol), extraction time (30, 45, and 60 minutes), and ratio of material :solvent (1:5, 1:6, and 1:7 w/v) on the yield (%) of oil extract from rubber seeds. The results showed that oil from rubber seed extract obtained with n-hexane exhibited a yellow color and had a rubber seed aroma, ethyl acetate solvent produced a cloudy yellow color and had an ethyl acetate aroma, and ethanol solvent produced a brownish yellow color and had a rubber seed aroma. The most significant oil extraction result from rubber seeds is ethanol solvent with a time of 45 and 60 minutes, and a ratio of material to solvent of 1:7 w/v. The rubber seed oil content was tested using GC-MS taken from the three best samples of each type of solvent (n-hexane, ethyl acetate, and ethanol) at an extraction time of 45 minutes and a ratio of material to solvent of 1:7 w/v. The oil compound content in rubber seed extract was 90.64% using hexane, 35.95% using ethyl acetate, and 25.19% using ethanol as solvents. The oil compounds extracted using n-hexane solvent consisted of 9-octadecanoic acid, methyl ester at 63.917%, those using ethyl acetate solvent were acetic acid, butyl ester at 30.67%, and those using ethanol solvent were n-hexadecanoic acid at 9.15%.

EXTRACTION OF DAMMAR RESIN (Agathis dammara) USING MICROWAVE-ASSISTED HYDRO-DISTILLATION (MAHD) A'yuni, Dewi Qurrota; Alhanif, Misbahudin; Hasna, Afifah; Halizah, Nurul; Damayanti, Damayanti; Auriyani, Wika Atro; Fahni, Yunita; Sanjaya, Andri; Mustafa, Mustafa; Kodarif, Abdul Rozak; Rahmiyati, Lutfia; Turnip, Nina Juliana Roberta; Safitra, Edwin Rizki; Saputri, Desi Riana
JURNAL INTEGRASI PROSES Vol 14, No 1 (2025)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v14i1.31631

Dammar resin (Agathis dammara) is a mixture of various organic polymers in a solid or semi-solid form that can be utilised as an essential oil source. This study extracted the essential oil from dammar resin using microwave-assisted hydro-distillation (MAHD), considering its ability to extract the product in a short period with only a small amount of solvent. This study investigates the effect of solvent and extraction time on the yield of dammar resin extract. Results showed that the highest yields are 27.500, 22.902, and 15.392% for distilled water, a 1:1 v/v mixture of ethyl acetate and distilled water, and a 1:1 v/v mixture of hexane and distilled water as solvents, respectively. The optimum extraction time was different for different solvents, in the 60–90 minute range. Based on the gas chromatography-mass spectrometry (GC-MS) analysis, the dammar resin extract contains several groups of components, including alcohol and sesquiterpene groups. The alcohol group was higher after extraction using an ethyl acetate and distilled water mixture, especially 2-Butoxyethanol, with a yield of 39.706%. Meanwhile, a mixture of hexane and distilled water increased the sesquiterpene compounds in products such as Germacrene D, yielding 19.975%.

OPTIMIZATION OF PECTIN YIELD FROM KEPOK BANANA PEEL (Musa Balbisiana BBB) USING ULTRASONIC EXTRACTION WITH ACETIC ACID AND SULFURIC ACID SOLVENTS Silvia, Putri Zulva; Saputri, Desi Riana; Damayanti, Damayanti; Auriyani, Wika Atro; Fahni, Yunita; Sanjaya, Andri; Yusupandi, Fauzi; Yuniarti, Reni; Safitra, Edwin Rizki; Tiara, Mega; Pajrin, Alfina; Alhanif, Misbahudin
JURNAL INTEGRASI PROSES Vol 14, No 1 (2025)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v14i1.31632

In Indonesia, banana fruit production occupies the first position compared to other fruits. The peel constitutes approximately 40% of the total weight of the fruit, thus producing a large amount of waste. The white part of the banana peel (mesocarp) has the potential to serve as a source of pectin, which primarily functions as a thickening and gel-forming agent. Pectin can be extracted from fruit peel using acidic solvents. This research was performed using the ultrasound-assisted extraction (UAE) method. This study utilized banana peel waste produced by banana chips traders in the city of Bandar Lampung and aims to determine the effect of temperature, time, and type of extraction solvent on the yield of pectin extract from kepok banana peels (Musa balbisiana BBB), and to identify the molecular functional groups of extracted pectin with the highest yield. Based on this research, it is known that the yield increases with increasing temperature and extraction time. The optimum condition for pectin extraction from kepok banana peel (Musa balbisiana BBB) was obtained at a temperature of 70 °C with a time of 90 minutes for both acetic acid and sulfuric acid solvents, yielding 12.63 and 14.09%, respectively. FTIR spectroscopy analysis reveals that the pectin extract exhibits functional groups with characteristic absorption bands in the specific wavelength regions consistent with pectin’s structure. These include O–H stretching vibrations, –CH₃ groups in the methoxyl (COOCH₃) branch, C–H bonds, C=O carbonyl groups, C–O bonds, and ether (C–O–C) linkages.

Co-Authors A'yuni, Dewi Qurrota Achmad, Feerzet Achmad, Feerzet Adimas Anugrah Rivandy Adiwibowo, Muhammad Triyogo Agriadi Dwi Nugroho Putro Agriadi Dwi Nugroho Putro Agus Slamet Riyadi Agustina, Berliana Putri Akbar, Daffa Ahsanul Aldillah Herlambang Alfares, Nelson Alhanif, Misbahudin Alhuda, Alhuda Amedeo Cavendish Amelia, Devita Andiani, Balqis Putri Anugrah Ayub Waskito Arhab, Jabir Shoji Arifino Decika Rachman Athallah Satrionindya Herlambang Atro Auriyani, Wika Aulia, Siti Aisyah Rahimah Auriani, Wika Atro Auriyani, Wika Atro Auriyani, Wika Atro Auriyani, Wika Atro Auriyani, Wika Atro Azzaima Ayu Ulisya A’yuni , Dewi Qurrota Christian Surya Atmaja, Michael Cika Amalia Shabira Damayanti Damayanti Damayanti Damayanti Demi Dama Yanti Desi Riana Saputri Desi Riana Saputri Devia Gahana Cindi Alfian Deviany Deviany, Deviany Deviany, Deviany Deviany, Deviany Didik Supriyadi Dikri Uzlifah Janah Edwin Rizki Safitra Endi Adriansyah Fadhila, Syalsa Fahmi, Yunita Fahni, Yunita Fahni, Yunita Fahni, Yunita Fahni, Yunita Fahni, Yunita Feerzet Achmad Fidel Abdiman Zega Fikri Rahmatul Ikhlas Galeh Widharma Guita Normi Halizah, Nurul Hasna, Afifah Ibnu Maulana Hidayatullah Ihsan, Ahyatul Ikhlas, Fikri Rahmatul Imalia, Calaelma Logys Jabosar Ronggur Hamonangan Panjaitan Kodarif, Abdul Rozak Kurniawansyah, Arief Ladien, Ahmad Fatrijan Listyadevi, Yuniar Luthfia Listyadevi, Yuniar Luthfia Mahardika, Melbi Mardiansyah, Rio Marlina, Titi Mediana, Annisa Misbahudin Alhanif Muhammad Bagus Tri Jaya Saputra Muhammad Triyogo Adiwibowo Mustafa Mustafa Mustafa, Mustafa Mustafa, Mustafa Nugroho, Andreas Dwi Nurafinda, Meylani Dwi Nurul Mawaddah Nyoman Wiswa Kananda, I P.T.Z, Luter evons Pajrin, Alfina Pradita, Natania Anggreani Prayoga, Ageng Kaka Putra Hidayatulloh Putra, Muhammad Alparidi Pamungkas Putri, Amelia Syifa Divana Rahmawati, Disty Rahmiyati, Lutfia Ramadhan, Zulfikar Ratih Ainun Mardiyah Reni Yuniarti Riana Saputri, Desi Ridho Ramadhan Jakop Rifqi Sufra Riziq, Annisa Zahara Rizki Safitra, Edwin Riztu, Sonia Robianto, Bagus Safira Anggarini Safitra, Edwin Rizki Safitra, Edwin Rizki Said, Aja Avriana Salsabila, Dwinda Sanjaya, Bagus Gelorawan Saputri, Desi Riana Saputri, Desi Riana Saputri, Desi Riana Saputri, Desi Riana Saputri, Desi Riana Sari, Dewi Kurnia Satria , Arysca Wisnu Satria, Arysca Wisnu Shifa, Naufal Brain Silvia, Putri Zulva Suhartono Surya Ningrum, Riska Suzana, Asih Sweatenia, Elisabeth Grace Syahriantoro, Nur Alfi Taharuddin Taharuddin Tiara, Mega Turnip, Nina Juliana Roberta Valiendra, Dhanda Ahmad Veronika Viany Suswanto Wicaksono, Rihardian Maulana Wika Atro Auriyani Yuniar Luthfia Listyadevi Yuniarti, Reni Yuniarti, Reni Yunita Fahni Yusupandi, Fauzi Yusupandi, Fauzi Yusupandi, Fauzi Zega, Fidel Abdiman

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