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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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Investigations on The Mechanism of Artificial Photosynthesis of Ca-Pc-PDI and Dendrimer Molecule by DFT Calculations Gunawan, Rahmat; Hammamiyah, Ulinnuha; Fadillah, Fahmi; Saleh, Chairul; Sitorus, Saibun
Jurnal ILMU DASAR Vol 19 No 2 (2018)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.376 KB) | DOI: 10.19184/jid.v19i2.7142

Abstract

Artificial photosynthesis modelling of Ca-Pc-PDI complex Ca Phthalocyanine Perylenediimide), and dendrimer molecule using Density of Functional Theory (DFT) Method has been studied to showed the energy efficiency of these compounds in terms of electron transfer in photosynthesis. The Analysis of Ca-Pc-PDI and dendrimer compound and also chlorophyl has been done in all computations using the GAMESS-US software. The computations result in this research showed that the large wavelength complex compounds of Ca-Pc-PDI obtained was 138.3299 nm and energy efficiency obtained was 0.89 eV. The data analysis states that the absorption of harvest light energy of complex compounds Ca-Pc-PDI lies in the far UV spectrum. The other side, the polyphenylene dendrimer structure molecular orbital analyses it was found that the dendrimer was capable of electron transfers as indicated by the existence of HOMO and LUMO and result comparisons with chlorophyll. UV wavelengths of the polyethylene dendrimer and chlorophyll, respectively, suggesting that the polyphenylene dendrimer is capable of substituting chlorophyll in artificial photosyntheses. We can states from the result that these compound ability to be applied in the modeling of artificial photosynthesis as a material of energy absorption that mimics the workings of chlorophyll in terms of electron transfer in natural photosynthesis process. Keywords: Artificial photosynthesis modelling, Ca-Phthalocyanine-Perylenediimide complex, and dendrimer molecule
PEMANFAATAN LIMBAH NON B3 FLY ASH DAN BOTTOM ASH DARI KEGIATAN PLTU SEBAGAI SUBTITUSI BAHAN BAKU PEMBUATAN PAVING BLOCK DAN BATAKO Erzha, Nutfahryza; Sitorus, Saibun; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1416

Abstract

The use of coal in power plant activities will produce solid waste in the form of fly ash and bottom ash. Alternative management to reduce the volume of ash waste is through utilization. Therefore, this study aims to determine the toxic characteristics of bottom ash fly ash waste, determine the physical properties of the compressive strength of paving blocks and bricks from the substitution of fly ash and bottom ash, as well as the most optimal proportion of substitution of the product based on the compressive strength parameter. Compatibility of Toxic Waste Characteristics is carried out through the Toxicity Characteristic Leaching Procedure (TCLP) test. Variation of optimal substitution for compressive strength is known through variations of fly ash and bottom ash substitution, for brick products which are 5%, 10%, 15%, and 20%, and for paving blocks which are 10%, 20%, 30%, and 40%. Through the TCLP test, it is known that the waste is below the TCLP A and TCLP B quality standards so it can be categorized as non toxic and hazardous waste. The results of using fly ash and bottom ash in brick products meet the requirements for compressive strength according to SNI 03-0349-1989. The results of using fly ash and bottom ash in paving block products meet the requirements for compressive strength according to SNI 03-0691-1996. The optimal variation of fly ash substitution for bricks is with 5% fly ash substitution that produces a compressive strength value of 201.42 kg/cm2 and paving blocks with 10% fly ash substitution that produces a compressive strength value of 225.01 kg/cm2. The optimal variation of bottom ash substitution for brick is with 5% bottom ash substitution that produces a compressive strength value of 226.30 kg/cm2 and for paving block is with 10% bottom ash substitution that produces a compressive strength value of 308.22 kg/cm2.
ANALISIS KADAR NITROGEN (N) TOTAL DAN BESI (Fe) PADA PENAMBAHAN BIOAKTIVATOR EM4 TERHADAP KOMPOS (SAMPAH KACANG PANJANG-KULIT KACANG KEDELAI) Cahyani, Amelya Putri; Sitorus, Saibun; Pratiwi, Djihan Ryn
JURNAL KIMIA MULAWARMAN Vol 22 No 1 (2024)
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.v22i1.1111

Abstract

Pengomposan merupakan proses penguraian bahan organik sampah dibawah kondisi-kondisi terkontrol oleh adanya aktivitas mikroorganisme pengurai. Proses pengomposan dilakukan dengan penambahan Effective microorgarnism 4 (EM4). Tahapan penelitian meliputi uji pengaruh waktu pengomposan terhadap suhu dan pH; penentuan variasi optimum bioaktivator EM4 terhadap kadar N-Total dan Fe serta waktu optimum pengomposan berdasarkan kondisi suhu, pH dan warna. Variasi optimum EM4 berdasarkan kadar N-Total pada variasi tanpa penambahan EM4 sebesar 0,4731% dan berdasarkan kadar Fe pada variasi EM4 20 mL sebesar 0,805%. Waktu optimum pengomposan berada pada hari ke-16 dengan pH 7,19-7,50; suhu sebesar 27-28,3°C dan memiliki warna hitam.
ANALISIS NILAI TOTAL SULFUR (TS) DAN CALORIFIC VALUE (CV) DALAM BATUBARA MENGGUNAKAN METODE AMRERICAN STANDARD TESTING AND MATERIAL (ASTM) DI PT GEOSERVICES SAMARINDA KALIMANTAN TIMUR Novianti, Rina Lia; Sitorus, Saibun; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Coal is a crucial energy source with varying quality levels. It is formed by the accumulation of organic sediments mixed with carbon, resulting from the diagenesis process of plant elements. This study aims to determine the Total Sulfur (TS) and Calorific Value (CV) of coal, which are essential factors in assessing coal quality and economic value. The American Standard Testing and Material (ASTM) method is employed to ensure consistency and standardization in the analysis. From an analysis of six samples, the total sulfur content was determined to be 1.98% for sample A, 1.88% for sample B, 2.06% for sample C, 0.14% for sample D, 0.70% for sample E and 0.18% for sample F. Additionally, the calorific value were determined to be 6267 Cal/g for sample A, 6126 Cal/g for sample B, 6234 Cal/g for sample C, 5189 Cal/g for sample D, 4986 Cal/g for sample E and 3917 Cal/g for sample F. Based on the total sulphur analysis sample D, sample E and sample F can be used in the cement burning process because their total sulphur content is less than 0.8%. Meanwhile, based on the calorific value analysis sample A, sample B and sample C can be used the cement burning process because their calorific value above 6000 Cal/g. Keywords : Coal, total sulphur, calorific value, American Standard Testing and Material.
ULASAN KANDUNGAN METABOLIT SEKUNDER DAN KAJIAN BIOAKTIVITAS PADA RUMPUT TEKI (Cyperus rotundus L.) Nurbah, Sahriana Putri; Sitorus, Saibun; Hairani, Rita
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Nutgrass (Cyperus rotundus L.) is one of the Cyperaceae family plants which is this plant belongs to weed. However, it is often used by the Chinese people as a traditional medicine. This review aimed to determine the bioactivity of nutgrass based on their secondary metabolite content. This review was carried out by Literature Review Article method from various journals through Google Scholar and Science Direct. The results of this review indicated that nutgrass has important bioactivities such as antioxidants, antidiabetic, anti-inflammatory, anticancer and antibacterial. Based on the review of those articles, it can be concluded that nutgrass has several important potency for human health to be further studied. Keywords: Cyperus rotundus L, Bioactivity, Secondary Metabolites
UJI FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN RAMBUTAN (Nephelium lappaceum)DENGAN METODE DPPH (1,1-diphenyl-2-picryhidrazyl) Pangaribuan, Fransiscus X. Rico; Sitorus, Saibun; Saleh, Chairul
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research about antioxidant test of rambutan leaves extract (Nephelium lappeceum) by using radical compound DPPH (1,1-diphenyl-2-picrylhidrazil) has been carried out. This research aims to determine antioxidant activity level of rambutan leaves extract and to detrermine kind of secondary metabolites in it. Concetration taht used in rambutan leaves extract are 5 ppm, 10 ppm, 25 ppm, 50 ppm dan 100 ppm. Result of fitochemical shows that secondary metabolites in n-hexane extract were alkaloid and flavonoid, secondary metabolites in ethyl acetat extract were alkaloid, flavonoid and phenolic, secondary metabolites in ethanol extract were alkaloid and phenolic where as secondary metabolites in ethanol-water extract weas phenolic. IC50 value in each extract of n-hexane, ethyl acetat, ethanol and ethaol-water in a row were 56,48 ppm; 16,82 ppm; 25,47 ppm and 8,59 ppm. The highest antioxidant activity level was in ethanol-water.
UTILIZATION OF ETHANOL FRACTION OF JARUM TUJUH BILAH LEAVES (Pereskia bleo (Kunth) D.C) AS XANTHINE OXIDASE INHIBITOR IN THE FORMATION OF URID ACID Sarwawan, Ade Putri Hawiyah; Sitorus, Saibun; Gunawan, Rahmat
JURNAL ATOMIK Vol 4 No 1 (2019)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This research was conducted to determine the content of secondary metabolite contained in the extract and ethanol fraction of “Jarum tujuh bilah” leaves (Pereskia bleo (Kunth) DC) and and inhibition of xanthine oxidase activity obtained from the isolation of cow's milk. The xanthine oxidase activity is measured at a wavelength of 290 nm. The results of this research indicate that in the ethanol extract and fraction of “jarum tujuh bilah” leaves have the secondary flavonoids, alkaloids and phenolic compounds. The highest inhibition of xanthine oxidase activity in the ethanol extract of “jarum tujuh bilah” leaves was 91.67%, while the inhibition of allopurinol was 50% and the ethanol fraction of “jarum tujuh bilah” leaves was seven blades by 90%.
PEMBUATAN SABUN DALAM BENTUK POLIOL DARI MINYAK BIJI KELOR (Moringa oleifera) Sihombing, Eka Putri Jayanthy; Tarigan, Daniel; Sitorus, Saibun
JURNAL ATOMIK Vol 1 No 1 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Polyol compounds obtained by epoxidation dan hydroxylation, the results obtained with the reaction yield of 69.23%. Potassium soap mixture in the form of a polyol obtained by saponification polyol with Potassium Hydroxide with a yield of 70.36%. Polyol and potassium soap in the form of a polyol mixture was analyzed by FT-IR spectrophotometer.Respectively iodine from moringa seed oil and polyol are 107.3769 mg I / gram of oil and 4.6755 mg I / gram of oil. HLB of fatty acid potassium soap of moringa seed oil and potassium soap in the form of a mixture of polyol is determined by titration method and obtained HLB of fatty acid potassium soap of moringa seed oil amounted to 5,2178 while the potassium soap in the form of a polyol mixture of 8,4767. Free alkalinity of soap potassium mixture in the form of a polyol is 0.551%. Based on the stability and strength of the foam test, the concentration of potassium soap mixture in the form polyols having the most excellent foam stability is 1% and which has the best strength is 1%.Keywords: moringa seed oil, epoxidation, polyol, saponification
ISOLASI AMILASE DARI KECAMBAH BIJI NANGKA (Artocarpus heterophyllus Lam) Fahmi, Ismi; Astuti, Winni; Sitorus, Saibun
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This research aims to isolate the crude extract amylase of sprouted seeds jackfruit (Artocarpus heterophyllus Lam) and determine the specific activity. Determination of total protein concentration and amylase activity of enzyme crude extract on seed germination jackfruit (Artocarpus heterophyllus Lam). Determination of total protein concentration using the method of Bradford, whereas the determination of amylase activity was performed using dinitrosalisilat acid method (DNS). The results showed a total protein concentration of the enzyme crude extract of sprout seeds jackfruit (Artocarpus heterophyllus Lam) is 319,47 ug / mL, amylase activity of 13,96 U / mL and specific activity is 1748,05 U / mg. 
ETHANOL PRODUCTION FROM SUWEG TUBER (Amorphophallus camapanulatus BI.) BY Saccharomyces cerevisiae WITH THE ADDITION OF NPK NUTRITION Adnyana, Ketut Cahyadi; Kartika, Rudi; Sitorus, Saibun
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research of ethanol made from suweg tuber flour (Amorphophallus camapanulatus BI.) with the addition of NPK as nutrition Saccharomyces cerevisiae, has been done. The ethanol making process consists of hydrolysis, fermentation, distillation, and testing carried out by Gas Chromatography. The hydrolysis stage is carried out by adding α-amylase and glucosyl amylase in order to break the polysaccharide chain into monosaccharide. The fermentation stage is carried out with time variation and NPK concentration. It can be seen that the addition of nutrients of 3.70 g (2%) NPK with a 7 day fermentation time resulted in the most optimum ethanol concentration of 67.357% and an ethanol volume of 7 mL.
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