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All Journal Jurnal Ilmu Dasar PROSIDING SEMINAR KIMIA KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman Science and Technology Indonesia JURNAL ATOMIK Chemistry Indonesian Journal of Chemical Research Dinamika Lingkungan Indonesia Ilmu Perikanan Tropis Nusantara ANDIL Mulawarman Journal of Community Engagement
Saibun Sitorus
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mulawarman
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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PENGGUNAAN MONOMER NAFION SEBAGAI PEMBAWA PROTON (H + ) DENGAN METODE TEORI FUNGSI KERAPATAN Alhabib, Albar; Gunawan, Rahmat; Sitorus, Saibun
JURNAL KIMIA MULAWARMAN Vol 12 No 1 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Research which has been conducted in this study aims to determine the use of the compound as a Nafion membrane in a Proton Exchange Membrane system (PEM) Fuel Cells which acts as a proton exchange (H + ). After assessment and computational chemistry calculations by calculating the value of energy optimization and molecular orbital energies obtained in the form of the HOMO and LUMO energy. Value calculation is done by using the calculation method of Density Function Theory (density function theory). The analysis showed Nafion energy value of -0.04358 x 10-18 J and Nafion after bringing energy protons (H+) of -0.07629 x 10-18 J. In this case proved that the PEM system of exchanging protons (H + ) is characterized by the presence of increased energy electron activity.Keywords : Proton Exchange Membrane, Fuel Cells, Nafion, Proton (H + ), the activity of electrons, density functional theory, the energy of the HOMO, LUMO energy.
Activity Test Of Ethanol and n-Hexane Fraction Of African Leaves (Vernonia amygdalina Delile) as Antihyperuricemia On Male Mice Induced by Potassium Oksonat Deni Karisnawati; Saibun Sitorus; Chairul Saleh
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
Publisher : PROSIDING SEMINAR KIMIA

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Antihyperuricemia activity tests have conductedon aethanolandn-hexane fraction Africanleaves (Vernonia amygdalina Delile). Hyperuricemia is a condition in which uric acid levels in the blood increases due to the high consumption of purine converted to uric acid by xanthine oxidase. Antihyperuricemia activity test of ethanolic and n-hexane fraction of African leaves (Vernonia amygdalina Delile) conducted on male white mice with variation in doses of 6, 11 and 22 mg/kg BW and variation of measurement time of 1, 2, 3 and 4 hours after administration of the extract orally. Data were analyzed with ANOVA and continued with Duncan test. Ethanolic fraction 11 mg/kg is the most effective fraction lower uric acid levels by 54.62% compared to alupurinol 300 mg/kg BW which lower uric acid levels by 56.91%. Phytochemical screening showed that the ethanolic fraction of African leaves contains triterpenoids, steroids, phenolics, flavonoids and saponins whereas n-hexane fraction containing alkaloids, steroids and flavonoids. These results show the extracts of African leaves have antihiperurisemia activity.
Isolasi dan Identifikasi Steroid dari Ekstrak N-Heksana Daun Afrika (Vernonia amygdalina Del.): Isolation and Identification of Steroid from N-Hexane Extract of Vernonia amygdalina Del. Evi Mashunah; Erwin; Saibun Sitorus
KOVALEN: Jurnal Riset Kimia Vol. 6 No. 1 (2020): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2020.v6.i1.15032

Abstract

Isolation and identification of steroids from the n-hexane fraction of Vernonia amygdalina Del. was carried out. Separation and purification were performed using flash chromatographic and gravity chromatography. Based on the results of phytochemical tests supported by UV and FT-IR data analysis, the isolate obtained was a steroid (sterol type). Toxicity test results using the Brine Shrimp Lethality Test (BSLT) were known that the steroid has moderate toxicity with an LC50 value of 48.39 ppm. Keywords: Vernonia amygdalina Del., Toxicity, BSLT, Sterol, Steroid
PENENTUAN KADAR ASAM AMINO ESENSIAL (METIONIN, LEUSIN, ISOLEUSIN DAN LISIN) PADA TELUR PENYU DAN TELUR BEBEK agita rachmala ginting; saibun sitorus; winni astuti
JURNAL KIMIA MULAWARMAN Vol 14 No 2 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Determination of amino acids essential’s content (methionine, leucine, isoleucine and lysine) on turtle eggs and duck eggs. Turtle eggs and duck eggs are a high animal protein source and easy to obtain. This research has been carried out by categorizing of turtle eggs and duck eggs by size and continued analysis of water content by Methods of Gravimetry, analyzes protein content total by the method of Kjeldahl and analysis of the levels of essential amino acids with method of HPLC (High Performance Liquid Chromatography). In this study, the researcher found the water content in the mix (large, medium and small) 75.2889% and turtle eggs on the mix 67.9020% duck egg. Total protein content in the mix turtle eggs 8.9268% and the mix duck eggs 14.2455%. Levels of essential amino acids in the mixture turtle eggs undetectable methionine, 3.25% leucine, isoleucine and lysine 1.53% 2.50%. In the mix duck eggs undetectable methionine, 1.30% leucine, isoleucine and lysine 0.58% to 0.38%.
Studi Molekul Kitosan Sebagai Membran Penghantar Proton (H) Dengan Metode Ab Initio Arif Ari Wibowo; Rahmat Gunawan; Saibun Sitorus
JURNAL KIMIA MULAWARMAN Vol 17 No 1 (2019)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v17i1.462

Abstract

The aim of this research to know chitosan compound able to replace nafion performance as a conductor of proton (H+). The assessment process and computational chemistry calculations done using ab initio methods. The analysis showed chitosan energy is -1384.7601 eH and chitosan energy after bringing proton (H +) decreased respectively by -1385.2275 eH, -1385.8487 eH, -1386.3393 eH, -1386.9652 eH, -1387.4508 eH. The result obtained proved of chitosan becomes stable so that it can be used as a proton conductor.
STUDI KUANTUM FARMAKOLOGI SENYAWA TURUNAN SULFONAMIDA 2,4 DIAMINO 6 QUINAZOLINE SEBAGAI ANTIMALARIA DENGAN MENGGUNAKAN METODE AB INITIO Boby Royan alfadlil; Saibun Sitorus; Rahmat Gunawan
JURNAL KIMIA MULAWARMAN Vol 11 No 2 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Telah diterapkan metode berbasis Ab-Initio dalam suatu analisa QSAR (Quantum Structure Activity Relationship) untuk dapat membuktikan dimana letak pusat aktif senyawa sulfonamida yang telah diketahui nilai persen aktivitasnya secara eksperimen laboratorium. Terdapat tiga tahapan komputasi dalam penelitian ini. Pertama, komputasi struktur elektron semua senyawa yang terlibat dalam 16 substiuen senyawa beserta nilai R dari masing-masing senyawa dalamrangka memperoleh struktur optimum serta nila momen dwikutub dan muatan bersih senyawa-senyawa tersebut. Kedua, teknik analisa data dengan pembuatan model kuantum farmakologi dari kombinasi variabel atom-atom yang selalu terdapat pada 16 senyawa tersebut. Ketiga, analisa regresi multilinear dengan menggunakan beberapa parameter statistik seperti koefisien korelasi (r dan r 2 ) dan standar estimasi (SE). Hasil penelitian ini menunjukkan bahwa metode Ab-Initio berhasil membuktikan daerah pusat aktif senyawa sulfonamida dengan n= 16, R= 0,99, dan nilai SE= 0,08 menunjukkan hubungan kuantitatif yang nyata terhadap antiplasmodial dengan model persamaan terbaik sebagai berikut : log A = 13,10(±0,04)qC1 – 193,21qC2 + 95,47C3 – 63,18qC4 – 2,54qC5 +151,38qC6 + 9,33(±0,02)qC7 + 30,32(±0,02)qC8 – 2,91qO1 – 0,04(±0,66)qO2 +72,37(±0,03)qN1 – 108,91(±0,03)qN1 + 2,96qS + 1,01(±0,04)? Kata kunci: Sulfonamida, Antimalaria, Qsar, Regressi, Ab-Initio
ANALISIS KEMAMPUAN KIAMBANG (Salvinia molesta) UNTUK MENURUNKAN KONSENTRASI ION LOGAM Cu (II) PADA MEDIA TUMBUH AIR Dewi Eka Yuliani; Saibun Sitorus; Teguh Wirawan
JURNAL KIMIA MULAWARMAN Vol 10 No 2 (2013)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This research was purposed to know about the water lettuce (Salvinia molesta) absorption ability for metal Cu (II) ion and the influence of plant sum variation and its contact time. The simulation is done by planting the water lettuce (Salvinia molesta) at water media as a growing place which prepared in 5 place that each be volumed by 5 l the plant of Cu solution as 20 mg/L, Then, the water lettuce (Salvinia molesta) also be volumed as 0 (blank), 10, 15, 20 and 25 as its variation. Then, this research also variated its contact time as 0, 3, 6, 9, 12, 15, 18 and 21 days. The concentration of metal Cu (II) ion in plant media was analyzed with Atomic Absorption Spectrophotometer (AAS). The research showed that the water lettuce (Salvinia molesta) was capable to absorp the metal Cu (II) ion with the optimal absorbtion happened at the 9th day in 15 plants sum of variation, with total percentage of the metal Cu (II) is absorbted to 81.68 %.Keyword: Water lettuce (Salvinia molesta), Cu (II), metal, water
PEMANFAATAN ABU BATUBARA SEBAGAI ZEOLIT YANG TERDEALUMINASI DALAM MENGADSORPSI FENOL Agustinus Pata; Saibun Sitorus; Rahmat Gunawan
JURNAL KIMIA MULAWARMAN Vol 12 No 1 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A research on the adsorption of phenol with zeolite adsorbent is formed from coal ash by hydrothermal process with the fusion method. In addition, the improvement in the ability of zeolite adsorbtion on the zeolite dealimination process is done. Phenol adsorption process is done through a batch shaker method with test parameters pH, contact time and adsorption capacity factor. The measurement results for the phenol optimum conditions were at pH 10 with a contact time of 30 minutes with the value of the phenol capacity of zeolite was 1,1853 mg/g were obtained using Langmuir isotherm adsorption equation.Keywords : Zeolite of coal ash, dealumination, adsorption, phenol.
PEMANFAATAN KARBON AKTIF DARI BATUBARA KOTOR (DIRTY COAL) SEBAGAI ADSORBEN ION LOGAM Cd 2+ DAN Pb 2+ DALAM LARUTAN Yogie Henry Payung; Saibun Sitorus; Alimuddin -
JURNAL KIMIA MULAWARMAN Vol 11 No 2 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The research of activated carbon utilization of dirty coal as an adsorbent ion cadmium (Cd) and plumbum (Pb) has been done. In this research, the variations of solutions pH value (1, 2, 3, 4, 5 and 6), contact time (5, 10, 15, 30, 45, 60, 75 and 90 minutes), and the variation of concentration (20, 40, 60, 80 and 100 mg/L) were applied. The determination of cadmium and plumbum ion concentraction used an Atomic Absorption Specthrometer (AAS). The optimum condition cadmium ion on pH 4, than in the plumbum on pH 5 with optimum time contact is 15 minutes and the maximum adsorptive capacity cadmium ion in value is 2,90 mg/g, than on plumbum ion is 3,08 mg/g.Keywords: Adsorption, Activated Carbon, Dirty Coal, Cadmium, Plumbum, Ion, Solution
IMPLEMENTASI BAKU MUTU AIR LIMBAH BERBASIS DAYA TAMPUNG BEBAN PENCEMARAN BADAN AIR PENERIMA PADA KEGIATAN PERTAMBANGAN BATUBARA Saibun Sitorus; Binsar Simangunsong
JURNAL KIMIA MULAWARMAN Vol 10 No 2 (2013)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This research is based on the fact that many rivers in East Kalimantan are complained to be polluted by coal mining activities even though many rules to protect surface waters are in place and obeyed. To explain why it is happened, an audit is conducted to the regulations and to the implementation of the regulations. Desk audit is carried out to assess whether the regulations about waste assimilative capacity and effluent limitation that are currently endorsed are appropriate or not compared to the TMDL concept. The audit of implementation is carried out to assess whether the regulations are applied thoroughly or not. The results is that the technical regulations to determine the class of water and to allocation waste load are absent.Therefore, many regulations related the water quality based effluent limitation are not implemented properly. Most of effluent limitation refer directly to the national or provincial standards that are usually less stringent than the water quality based standard of the local rivers or small rivers. The case study in Loa Haur River obtains that the waste assimilative capacity of the river is 33.696 ton of TSS/day. The WAC that is allocated to 6 (six) coal mining in the sub basin of Loa Haur is 5 ton/day. The allocation is based on their production capacity. The results of water quality based effluent limitation of coal mining companies in the Loa Haur sub basin is 0.17 ton TSS/day or its concentration of 114.63 mg/L.Keywords: Audit, implementation, polluted coal mining
Co-Authors Abimanyu, Priem Reyhan Adelia Salma Adeliawati Adnyana, Ketut Cahyadi agita rachmala ginting Agustinus Pata Agustinus Pata, Agustinus Akbarul Fauzan Albar Alhabib, Albar Alimuddin - Alimuddin - Aman Sentosa Panggabean Annisa Aisya Ardi Ardi Arif Ari Wibowo Arissah, Nur Ashari, Ayu Wanti Azzahro, Raisha Binsar Simangunsong Binsar Simangunsong, Binsar Bobby Charles Setiawan Boby Royan alfadlil Boby Royan alfadlil, Boby Royan Bohari Yusuf Cahyani, Amelya Putri Chairul Saleh Dani Safrian Kusuma Daniel Daniel Daniel Daniel Tarigan Dedy Prasetyo Deni Karisnawati Dewi Eka Yuliani Djihan Ryn Pratiwi, Djihan Ryn Erwin Erzha, Nutfahryza Eva Marliana, Eva Evi Mashunah Fadillah, Fahmi Fahmi, Ismi Firmansyah - Hairani, Rita Hamdhani, Hamdhani Hammamiyah, Ulinnuha Haspian Nanda Trimeido Hasriani Hasriani, Hasriani Henny Pagoray, Henny Hiyahara, Irfan Ashari Idris Mandang, Idris Indra Masmur Irviansyah, Alfian Iswara, Muhammad Wahyugo Juwita, Retno Khairul Zhafirin Bayu Al-Hazmi Kurniawan, Burhan Kusumastuti, Meidina Lambang Subagiyo Laupa, Siti Aisyah Lianasari, Ika Yekti Linda Agustina M, Eka Riskhi Magdaleni, Agustina Rahayu Margarita, Margarita Masmur, Hestina Muhamad Yulianto Nanang Tri Widodo Novianti, Rina Lia Nur Anisa Rahmawati Nurbah, Sahriana Putri Oliviani, Nadira Oman, Aries Pangaribuan, Fransiscus X. Rico Putri, Amelia Rahmadi, Mohammad Zulfian Rahmat Gunawan RAHMAT GUNAWAN Rifqi Favian Jiwani Rio Trisdiantoro Ritson Purba Ritson Purba, Ritson Riyanto, Rahmat Fajar Rudi Kartika, Rudi Rudy Agung Nugroho Ruga, Ritbey S. R, Firdaus Salsabilla Nur Anisa Samsul Rizal Sari, Ika Yekti Liana Sari, Prinka Susmita Sari, Riska Alif Kartika Sarwawan, Ade Putri Hawiyah Sihombing, Eka Putri Jayanthy Sihotang, Recha Defrosa Morasih Samta Siti Hosniah Subur P Pasaribu Sukma Wiratama Sulistiani, Oktaviana Dewi Teguh Wirawan Teguh Wirawan, Teguh Victoria, Stefanie Wahyudin, Muhamad Winni Astuti Winni Astuti, Winni Wiranata, Muhammad Harjan Yerwanto Ilang Yogie Henry Payung Yogie Henry Payung, Yogie Henry Youlanda, Desy