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All Journal Reaktor International Journal of Renewable Energy Development TEKNIK Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip Seminar Nasional Teknik Kimia Kejuangan Prosiding Semnastek Jurnal Penelitian Pertanian Terapan Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Civil Engineering Study International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis

Titik Istirokhatun

Department Of Environmental Engineering, Faculty Of Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus UNDIP Tembalang, Semarang 50275

Author-ID : 290103

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Produksi Glukosamin melalui Hidrolisis Kitosan Menggunakan Irradiasi Microwave Nur Rokhati; Titik Istirokhatun; Reisa Novita Marpaung; Ananda Dwi Utomo
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Glucosamine (2-amino-2-deoxy-glucose) is an amino-monosaccharide from chitosan, which has many usesin the field of health, especially for the joints, bones, and teeth. Glucosamine can be obtained by the completehydrolysis of chitosan. The influence of microwave irradiation on the chitosan hydrolysis with catalyzed byhydrochloric acid was studied. The hydrolyzed chitosan was characterized by reducing sugar measurement,and FT-IR analysis. The results were compared between hydrolysis using conventional heating andmicrowave irradiation. Microwave irradiation can increase the reaction rate of glucosamine formation.Under the condition of microwave irradiation, the yield of glucosamine is 72.67% after 20 min hydrolysis.While to obtain yield glucosamine 70% required 2 hours for hydrolysis using conventional heating.Chemical structure by FTIR and the reducing sugar content of the glucosamine produced not different withthe glucosamine purchased from Sigma-Aldrich.

HIDROLISIS ENZIMATIK KITOSAN DENGAN KOMBINASI ENZIM ENDO-GLUCANASE DAN CELLOBIOHYDROLASE Nur Rokhati; Bambang Pramudono; Titik Istirokhatun; Mohammad Sulchan; Dyah Ayu Kresnianingrum; Luthfi Kurnia Dewi
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

Abstract CHITOSAN ENZYMATIC HYDROLYSIS USING A COMBINATION OF ENDO-GLUCANASE AND CELLOBIOHYDROLASE. Chitosan is very promising in various fields including medicine, pharmacology, and the food industry. However, the application of this polysaccharide is limited by its high molecular weight resulting in its low solubility in aqueous media. In this respect, the chitosan with shorter chain length, display a reduced viscosity and are soluble in aqueous media at pH values close to neutrality. The aim of this study is the hydrolysis of chitosan to obtain a low molecular weight chitosan using enzymes endo-glucanase and cellobiohydrolase. The hydrolysis of chitosan was carried out under a temperature of 40° C and pH 5. Chitosan degradation was monitored by the analysis of reducing sugars and viscosity, whereas the chemical characterization of chitosan is done by using test FTIR (infrared spectroscopy). The results showed that enzyme treatment resulted in a substantial loss in viscosity of the chitosan solution shows depolymerization. Depolymerization using endo-glucanase took place very quickly during the initial 15 minutes. The rate of viscosity decrease on chitosan degradation using cellobiohydrolase is lower than using endo-glucanase. When the reaction time was 4 h, the lowest viscosity is showed by cellobiohydrolase, and the highest solubility is showed by combination of endo-glucanase and cellobiohydrolase. Keywords: endo-glucanase; cellobiohydrolase; chitosan; hydrolysis Abstrak Kitosan dapat dimanfaatkan di berbagai bidang seperti kedokteran, farmasi dan industri makanan. Aplikasi kitosan sering dibatasi oleh berat molekul kitosan yang tinggi sehingga viskositasnya tinggi dan kelarutannya rendah. Kitosan dengan rantai polimer pendek, akan mempunyai viskositas rendah, dan mudah larut pada larutan/air dengan pH mendekati netral. Penelitian ini bertujuan untuk menghidrolisis kitosan secara enzimatis menggunakan enzim endo-glucanase dan cellobiohydrolase. Hidrolisis kitosan dilakukan pada suhu 40 °C dan pH 5. Degradasi kitosan dipantau melalui analisa gula reduksi dan viskositas, sedangkan karakterisasi kimia kitosan dilakukan dengan menggunakan uji FTIR (infra red spectroscopy). Hasil penelitian menunjukkan bahwa hidrolisis enzimatis kitosan dapat menyebabkan terjadinya penurunan berat molekul yang ditandai dengan adanya penurunan viscositas larutan kitosan. Pada 15 menit awal hidrolisis terjadi penurunan viskositas yang sangat besar. Laju penurunan viskositas enzim cellobiohydrolase lebih rendah dibanding dengan enzime endo-glucanase. Setelah waktu reaksi 4 jam, viskositas terendah diperoleh pada enzime cellobiohydrolase, sedangkan kelarutan tertinggi diperoleh pada kombinasi enzime endo-glucanase dan cellobiohydrolase. Kata kunci: endo-glucanase; cellobiohydrolase; kitosan; hidrolisis

ULTRAFILTRATION AS PRETREATMENT OF REVERSE OSMOSIS: LOW FOULING ULTRAFILTRATION MEMBRANE PREPARED FROM POLYETHERSULFONE–AMPHIPHILIC BLOCK COPOLYMER BLEND Heru Susanto; Luqman Buchori; Siswo Sumardiono; Berkah Fajar; Titik Istirokhatun; I Nyoman Widiasa
Reaktor Volume 12, Nomor 4, Desember 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

This paper demonstrates the preparation of polyethersulfone (PES) ultrafiltration (UF) membranes via wet phase inversion method using either poly(ethylene oxide)-b-poly(propylene oxide)-b- poly(ethylene oxide) (Pluronic®, Plu) or polyethylene glycol (PEG) as hydrophilic modifier. Their effects on membrane structure as well as the resulting membrane performance and their stability in membrane polymer matrix were systematically investigated. The investigated membrane characteristics include surface hydrophilicity (by contact angle), surface chemistry (by FTIR spectroscopy) and water flux measurement. Visualization of membrane surface and cross section morphology was also done by scanning electron microscopy. The membrane performance was examined by investigation of adsorptive fouling and ultrafiltration using solution of bovine serum albumin as the model system. The stability of additive was examined by incubating the membrane in water (40oC) for up to 10 days. The results show that modification effects on membrane characteristic and low fouling behavior were clearly observed. Further, amphiphilic Pluronic generally showed better performance than PEG.

Membrane Technology Application for Fractionation Process to Obtain High Quality Glucosamine Nur Rokhati; Titik Istirokhatun; Nur ‘Aini Hamada; Dwi Titik Apriyanti
Reaktor Volume 20 No.2 June 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Glucosamine, monosaccharide from chitosan obtained from the chitin deacetylation process, has been used widely in various fields such as nutrition, pharmacy, and cosmetics. Glucosamine can be obtained from the hydrolysis of chitosan. Enzymatic hydrolysis provides the advantage of mild reaction conditions, environmentally friendly, and high yield. But until now, the separation of glucosamine from the chitosan hydrolysis fraction has been an obstacle. Ultrafiltration membranes offer an efficient filtration process because they do not require additional chemicals. The performance of ultrafiltration membranes was analyzed from the fractionation process of chitosan hydrolysis. The PES membranes in 10, 25, and 50 kDa were used to filter hydrolyzed Low Molecular Weight Chitosan (LMWC) in varied concentrations. The experiment was carried out in crossflow membrane module for flat sheet at room temperature in 1 bar. The permeate flux during filtration decreased rapidly at the initial and gradually over time because of fouling and concentration polarization. The more concentrated hydrolyzed LMWC solution resulted higher percentage of rejection up to almost 20% at the same membrane MWCO while higher MWCO resulted lower rejection percentage for the same hydrolyzed LMWC concentration. The FTIR spectrum of the used membranes of all types had absorption bands of glucosamine which proved that the fractionation process occurred. The time retention in HPLC chromatograms of glucosamine produced were similar with standard glucosamine. Thus, ultrafiltration could be applied for hydrolyzed LMWC fractionation process.Keywords: fractionation; glucosamine; LMWC; MWCO; ultrafiltration

Pengaruh Jumlah Kendaraan dan Faktor Meteorologis (Suhu, Kecepatan Angin) Terhadap Peningkatan Konsentrasi Gas Pencemar CO, NO2, dan SO2 Pada Persimpangan Jalan Kota Semarang (Studi Kasus Jalan Karangrejo Raya, Sukun Raya, dan Ngesrep Timur V) Elaeis Noviani R.; Kiki Ramayana L. Tobing; Ita Tetriana A.; Titik Istirokhatun
DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip DIPOIPTEKS Vol. 1, No. 1 (2013)
Publisher : DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip

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Jalan Ngesrep Timur V, Jalan Sukun Raya dan Jalan Karangrejo Raya Kota Semarang adalah jalan yang terletak di persimpangan yang terdapat di kecamatan Banyumanik yang merupakan jalan kolektor yaitu jalan yang melayani angkutan pengumpulan atau pembagian dengan ciri-ciri perjalanan sedang, kecepatan rata-rata yang sedang dan jumlah jalan masuk yang dibatasi. Jalan Karangrejo Raya dan jalan Sukun Raya dialokasikan sebagai pusat aktivitas dan aglomerasi penduduk seiring dengan bermunculnya fasilitas perdagangan dan perumahan baru, sedangkan jalan Ngesrep Timur V dialokasikan sebagai fasilitas pendidikan karena adanya 3 perguruan tinggi yang cukup ternama di kawasan ini yaitu Universitas Diponegoro, Politeknik Negeri Semarang dan Politeknik Kesehatan Semarang. Semakin hari jumlah kendaraan yang melintasi Jalan Ngesrep Timur V, Jalan Sukun Raya dan Jalan Karangrejo Raya semakin meningkat, yang dapat mengakibatkan terjadinya pencemaran udara akibat kendaraan bermotor yang lalu lalang di jalan tersebut terutama gas pencemar CO, SO2, dan NO2 yang berasal dari aktivitas kendaraan bermotor. Hal ini menjadi latar belakang untuk diadakannya penelitian guna mengetahui besar konsentrasi gas pencemar di ketiga jalan tersebut.Metode penelitian yang digunakan adalah pengambilan sampel secara langsung di lokasi pada saat jam padat kendaraan yaitu pada pagi hari (07.00-08.00), siang hari (13.00-14.00), dan sore hari (16.00-17.00) selama 12 hari masing-masing 3 hari berturut-turut di Jalan Karangrejo Raya, Jalan Sukun Raya, dan Jalan Ngesrep Timur V dan 3 hari sisanya membandingkan kedua jalan, dimulai dari Jalan Karangrejo Raya dan Sukun Raya, Jalan Karangrejo Raya dan Ngesrep Timur V, dan Jalan Sukun Raya dan Ngesrep Timur V. Berdasarkan hasil penelitian yang telah dianalisa, konsentrasi CO di jalan Karangrejo Raya berkisar antara 8-14ppm, konsentrasi CO di jalan Sukun Raya berkisar 8-17ppm, dan konsentrasi CO di jalan Ngesrep Timur V 8-19ppm. Hal ini menunjukkan konsentrasi CO di ketiga jalan berada di atas baku mutu. Sedangkan konsentrasi NO2 di Jalan Karangrejo Raya berkisar antara 0,7-4,2μg/Nm3, konsentrasi NO2 di Jalan Sukun Raya berkisar antara 1,0-4,1μg/Nm3, dan konsentrasi NO2 di Jalan Ngesrep Timur V berkisar antara 0,2-1,7μg/Nm3. Hal ini menunjukkan bahwa konsentrasi NO2 di ketiga jalan berada jauh dibawah baku mutu. Hasil statistik menunjukkan bahwa jumlah kendaraan dan faktor meteorologis seperti, suhu, kecepatan angin mempengaruhi konsentrasi CO, NO2. Selanjutnya untuk konsentrasi SO2 yang berada di Jalan Karangrejo Raya berkisar 14-21,1 μg/Nm3, untuk Jalan Sukun Raya sebesar 14-18,8 μg/Nm3 dan konsentrasi SO 2 yang terukur di Jalan Ngesrep Timur V yaitu 0,4-6,1 μg/Nm3.

POTENSI LISTRIK DAN DEGRADASI FOSFAT BERTEKNOLOGI PLANT MICROBIAL FUEL CELL DENGAN MEDIA TANAMAN ECENG GONDOK Lidiya Novelendah; M Husen Senoaji; Fiorentina Sinurat; Akhmad Masykur Hadi Musthofa; Titik Istirokhatun
Prosiding Semnastek PROSIDING SEMNASTEK 2018
Publisher : Universitas Muhammadiyah Jakarta

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Kebutuhan akan supply energi listrik tidak terpisahkan dari kehidupan manusia, karena energi listrik dibutuhkan untuk menunjang berbagai aktivitas yang dilakukan. Disisi lain, permasalahan yang sedang dihadapi saat ini yakni meningkatnya berbagai kontaminan pencemar di sistem perairan. Salah satu bahan pencemar tersebut adalah fosfat (PO4). Penelitian ini bertujuan untuk mengetahui seberapa besar potensi listrik yang mampu dihasilkan serta seberapa besar konsentrasi fosfat yang mampu didegradasi melalui teknologi Plant Microbial Fuel Cell (PMFC) dengan media tanaman eceng gondok (Eichornia Crassipes). Teknologi Plant Microbial Fuel Cell (PMFC) diketahui dapat menghasilkan sumber energi listrik alternatif. Penelitian ini dilakukan dalam skala laboratorium di laboratorium Teknik Lingkungan Universitas Diponegoro selama 21 hari, dengan uji pendahuluan selama 14 hari yang dilanjutkan uji sesungguhnya selama 7 hari. Dalam penelitian ini 4 buah reaktor kapasitas 50 liter digunakan sebagai media berlangsungnya penelitian. Adapun variabel dalam penelitian ini adalah variasi jumlah tanaman eceng gondok pada masing-masing reaktor yakni penuh, setengah, seperempat, dan tanpa eceng gondok sebagai kontrol. Hasil penelitian menunjukkan Plant Microbial Fuel Cell (PMFC) dengan media tanaman eceng gondok berpotensi menghasilkan listrik dengan daya listrik yang dihasilkan sebesar 0,772 mW/m2 serta berpotensi mendegradasi fosfat sebesar 8,426 mg/L dengan efisiensi 87,36%.

EDUKASI PELINDUNGAN LAPISAN OZON MELALUI IDENTIFIKASI ALIRAN MASSA REFRIGERANT DAN BAHAN PENDINGIN DI KOTA SURAKARTA Bimastyaji Surya Ramadan; Nurandani Hardyanti; Titik Istirokhatun; Winardi Dwi Nugraha; Wiharyanto Oktiawan
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 3, No 1 (2021)
Publisher : Fakultas Teknik Universitas Diponegoro

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Pengabdian masyarakat ini bermitra dengan Dinas Lingkungan Hidup Kota Surakarta untuk mengidentifikasi aliran massa bahan pendingin di Kota Surakarta. Tujuan dari kegiatan ini adalah untuk mengindentifikasi bahan pendingin di Kota Surakarta. Bahan pendingin berpotensi memberikan kontribusi terhadap gas rumah kaca sehingga pengetahuan mengenaik aliran massa sangat diperlukan untuk edukasi lanjutan terkait. Pengambilan sampel dilakukan pada penyedia jasa bengkel/servis AC, distributor, penjual bahan kimia dan para pengguna, terutama dari sektor non domestik. Kegiatan ini dibatasi pada inventarisasi kegiatan yang berpotensi menggunakan bahan perusak ozon, utamanyya dari massa refrigerant yang digunakan secara umum. Dari hasil survei yang telah dilakukan, dapat diketahui bahwa refrigeran yang paling banyak ditemukan di Kota Surakarta adalah R-22 dan yang paling rendah adalah MC-22 dimana bahan tersebut digunakan sebagai bahan pendingin pada AC ruangan, lemari pendingin, freezer, ixe cube dan cold roomKata kunci : bahan pendingin, refrigeran, distributor AC, Surakarta

PELATIHAN PEMBUATAN ECOBRICKS SEBAGAI PENGELOLAAN SAMPAH PLASTIK DI RT 01 RW 05, KELURAHAN KRAMAS, KECAMATAN TEMBALANG, SEMARANG Titik Istirokhatun
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 1, No 2 (2019)
Publisher : Fakultas Teknik Universitas Diponegoro

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AbstrakSampah plastik di Indonesia menjadi sumber utama penumpukan bobot sampah, terlebih plastik diuraikan dalam waktu 1 millenium atau sekitar 1000 tahun. Maka, prinsip 3R yaitu Reduce (mengurangi), Reuse (Menggunakan kembali), dan Recycle (Mendaur ulang) selayaknya kita terapkan dalam mengatasi sampah plastik. Salahsatu daur ulang limbah yang saat ini populer adalah mendaur ulang botol plastik melalui ecobricks. Perumahan Permata Tembalang sebagai salah satu kawasan perumahan yang berada di Kelurahan Kramas Kecamatan Tembalang Kota Semarang memiliki permasalahan pengelolaan persampahan dikarenakan sistem yang terbentuk tidak berjalan dengan baik. Selain itu ditunjang dengan rendahnya kesadaran warganya pada pengolahan sampah. Metode pengabdian masyarakat yang dilakukan dalam rangka edukasi metode ecobricks dilakukan dalam tiga tahap, meliputi tahap persiapan, tahap sosialisasi dan simulasi, serta tahap akhir. Tahap persiapan terdiri dari pengumpulan data dan pembuatan modul ecobricks. Tahap selanjutnya terdiri dari sosialisasi, edukasi dan praktik pengolahan sampah plastik menjadi produk yang bermanfaat, punya nilai tambah dan aman terhadap lingkungan dengan metode bricks serta monitoring tahap I. Tahap akhir terdiri dari pembuatan laporan akhir dan monitoring tahap II. Hasil dari pengabdian masyarakat adalah penurunan jumlah sampah plastik tidak terolah yang berimplikasi terhadap semakin besarnya kesadaran warga RT 01/RW V dalam pengelolaan sampah, serta dapat menjadi pilot project dan best practice pengelolaan sampah kawasan perumahan.. Kata kunci : pengolahan, sampah, plastik, ecobricks

Layer by Layer Composite Membranes of Alginate-Chitosan Crosslinked by Glutaraldehyde in Pervaporation Dehydration of Ethanol Nur Rokhati; Titik Istirokhatun; Asep Muhamad Samsudin
International Journal of Renewable Energy Development Vol 5, No 2 (2016): July 2016
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.5.2.101-106

Hydrophilicity of membrane causing only water can pass through membrane. Pervaporation process using organophilic membrane has been offered as alternative for ethanol dehydration. This paper investigate pervaporation based biopolymer composite membrane from alginate-chitosan using layer by layer method prepared by glutaraldehyde as crosslinking agent and polyethersulfone (PES) as supported membrane. Characterization of crosslinked of composite membrane by FTIR helped in identification of sites for interaction between layers of membrane and support layer (PES). The SEM showed a multilayer structure and a distinct interface between the chitosan layer, the sodium alginate layer and the support layer. The coating sequence of membranes had an obvious influence on the pervaporation dehydration performance of membranes. For the dehydration of 95 wt% ethanol-water mixtures, a good performance of PES-chitosan-alginate-chitosan (PES/Chi/Alg/Chi) composite membrane was found in the pervaporation dehydration of ethanol. Article History: Received April 12nd , 2016; Received in revised form June 25th , 2016; Accepted July 1st , 2016; Available onlineHow to Cite This Article: Rokhati, N., Istirokhatun, T. and Samsudin, A.M. (2016) Layer by Layer Composite Membranes of Alginate-Chitosan Crosslinked by Glutaraldehyde in Pervaporation Dehydration of Ethanol. Int. Journal of Renewable Energy Development, 5(2), 101-106.http://dx.doi.org/10.14710/ijred.5.2.101-106

Preparation and Characterization of Zeolite Membrane for Bioethanol Purification Aprilina Purbasari; Titik Istirokhatun; Ariestya Meta Devi; Lulluil Mahsunnah; Heru Susanto
Bulletin of Chemical Reaction Engineering & Catalysis 2013: BCREC Volume 8 Issue 1 Year 2013 (June 2013)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.8.1.4062.47-53

The use of bioethanol as an alternative fuel with a purity of more than 99.5% wt has prompted research on bioethanol purification. One of the promising methods used for bioethanol purification is pervaporation membrane. This research is aimed to prepare and characterize zeolite membranes for pervaporation membrane. The membrane preparation consisted of two stages, namely support preparation and zeolite deposition on the support. In support preparation, α- alumina and kaolin with specific composition (50:30; 40:40; 50:30) was mixed with additives and water. After pugging and aging process, the mixture became paste and extruded into tubular shape. The tube was then calcined at temperature of 1250 °C for 3 hours. After that, zeolite 4A was deposited on the tubes using clear solution made of 10 %wt zeolite and 90 %wt water and heated at temperature of 80 °C for 3 hours. Furthermore, the resulting zeolite membranes was washed with deionized water for 5 minutes and dried in oven at temperature of 100 °C for 24 hours. Characterization of zeolite membranes included mechanical strength test, XRD, and SEM. In the mechanical strength test, the membrane sample with α- alumina:kaolin = 50:30 (membrane A) has the highest mechanical strength of 46.65 N/mm2. Result of XRD analysis for the membrane A indicated that mullite and corundum phases were formed, which mullite phase was more dominant. Meanwhile the result of SEM analysis shows that zeolite crystals have been formed and covered the pores support, but the deposition of zeolite has not been optimal yet. The performance examination for bioethanol purification showed that the membrane could increase the purity of bioethanol from 95% to 98.5% wt. © 2013 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)

Co-Authors Akhmad Masykur Hadi Musthofa Ananda Dwi Utomo Apriliana, Pamella Aprilina Purbasari Apriyanti, Dwi Titik Ariestya Meta Devi Asep Muhamad Samsudin Asep Muhamad Samsudin, Asep Muhamad Aulia, Mustika Azaria Primelya Bambang Pramudono Berkah Fajar Budiono Joko Nugroho Desiriani, Ria Destiasari, Ajeng Dwi Titik Apriyanti Dyah Ayu Kresnianingrum Elaeis Noviani R. Elaeis Noviani R. Elaeis Noviani Ratnasari, Elaeis Noviani Endro Sutrisno Fajar S. S Nur Filardli, Abdullah Malik Islam Fiorentina Sinurat Gonzales, Ralph Rolly Hamada, Nur ?Aini Haryono Setiyo Huboyo Heny Kusumayanti Heru Susanto I Nyoman Widiasa Irawan Wisnu Wardhan Ita Tetriana A. Ita Tetriana A. Ita Tetriana Agustini Kiki Ramayana L. Tobing Kiki Ramayana L. Tobing Lidiya Novelendah Lulluil Mahsunnah Luqman Buchori Luthfi Kurnia Dewi M Husen Senoaji Mohammad Sulchan Nur Rokhati Nur Rokhati Nur ‘Aini Hamada Nurandani Hardyanti Nurfaiz, Agus Oktiawan Wiharyanto Pertiwi Andarani Purwono Purwono, Purwono Ramadan, Bimastyaji Surya Reisa Novita Marpaung Siahaan, Samuel Ezra Siswo Sumardiono Sri Sumiyati Sudarno Sudarno Sudarno utomo Sumardi Widiyanto, Edhi Wiharyanto Oktiawan Winardi Dwi Nugraha

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