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All Journal HAYATI Journal of Biosciences Jurnal Pengolahan Hasil Perikanan Indonesia JURNAL KIMIA SAINS DAN APLIKASI INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Jurnal Kimia Terapan Indonesia Indonesian Journal of Chemistry Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Bulletin of Chemical Reaction Engineering & Catalysis LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI JURNAL REKAYASA KIMIA & LINGKUNGAN

Komar Sutriah

Department Of Chemistry, FMIPA, IPB University Jalan Tanjung Kampus IPB, Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680, Indonesia

Author-ID : 397447

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Veterinary

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Perencanaan Kebutuhan Pranata Laboratorium Pendidikan di Institut Pertanian Bogor: Requitment Planning of Laboratory Education Staff at Bogor Agricultural University Eko Prasetyo; M. Syamsul Maarif; Komar Sutriah
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 6 No. 1 (2016): Jurnal Sains Terapan, Volume 6 Nomor 1, Tahun 2016
Publisher : IPB University

The objective of the research was to analyze requirement planning, ideal number as well as formulating planning strategy for Laboratory Education Staff (LES) at Bogor Agricultural University. Data was collected by filling the questionnaire and interview with laboratory staff of Bogor Agricultural University, then documentation. Completely randomized design and Antilon (anti-ln/enilai y) was performed to analyze the data, then geometric mean value was analysed by qualitative descriptive, whereas formulation of strategy was performed by SWOT matric. The result shows that time activities allocation by LES were still low as well as less ideal number of LES. In addition, according to SWOT matric analysis, formulation of the strategies to improve work quality of LES were development of staff capability, providing adequate tools and materials, escalating of staff performance and refinement of leadership manner.

PENGARUH TEKNIK SINTESIS TERHADAP KUALITAS PRODUK FATTYAMINA SEKUNDER Komar Sutriah; Zainal Alim Mas'ud; Tun Tedja Irawadi
Jurnal Kimia Terapan Indonesia Vol 13, No 1 (2011)
Publisher : Research Center for Chemistry - LIPI

Secondary fattyamines has been synthesized by reacting primary fatty amines with acylchlorides and continued with reducing the corresponding secondary fattyamides formed to secondary fattyamines using LiAIH<I'Fatty amines are raw material of natural-based surfactants that can be derived from fatty acids, olefins, or alcohols, of which can be synthesized from natural sources such as palm oil. Conversion of secondary fatty amides to secondary fatty amines was evaluated through the quality of FTIR spectra on wave number of 1639-1645 em' (C=O vibration) and 1544-1555 em" (vibrations of C-H and of secondary amine N-H). Method of synthesis by using closed reflux syncore reactor was better than those of using microwave teflon tubes, and open reflux. The yield of 9 different secondary fatty amines obtainedfrom 5 to 27 replicates by the closed reflux syncore reactor method varied from 17%to 96%.Keywords: Natural-based surfactant, secondary fatty amines

Preparation and Characterization of Carbon Foam Derived from Fine Coal and Phenolic Resin Dodi Irwandi; Zainal Alim Mas’ud; Komar Sutriah; Muhammad Khotib
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

Carbon foam from fine coal and phenolic resin mixture had been prepared by heating in nitrogen atmosphere. The composition of fine coal in a mixture was 30, 35, 40, 45 and 50%. Physical and mechanical characters of carbon foam that were determined from each of these compositions were density, porosity, compressive strength, and oxidation resistance and thermal insulation. Microstructure was observed by scanning electron microscope (SEM). Thermal insulation was tested using an insulation index approach with Styrofoam for comparison. The result showed that the density and compressive strength were proportional to the composition, otherwise, the porosity. Oxidation resistance that was up to 45% composition still showed proportional value. Microstructure observations showed an irregular distribution of pore and uninform diameter. Insulation index of 34 to 50 °C showed almost the same values of all compositions and greater than styrofoam up to 50-150% which mean carbon foam had a better thermal insulation properties than styrofoam.

Thermodynamic and Kinetic Study of Zinc bis-(Dipalmithyl Dithiophosphate) Activity as Anti-Corrosion Additive-Fatty Acid Based Through Potentiodynamic Polarization Technique Komar Sutriah; Zainal Alim Mas’ud; Mohammad Khotib; Denar Zuliandanu
Indonesian Journal of Chemistry Vol 16, No 2 (2016)
Publisher : Universitas Gadjah Mada

Zinc bis-(dipalmithyl dithiophosphate) (ZDTP16) is one product variant of zinc dialkyl dithiophosphate (ZDTP)-fatty acid based having function as corrosion inhibitor. By using 3% of effective dose for the application, its effectiveness of ZDTP16 corrosion inhibition will achieve 97% and it will be able to decrease Cu metal corrosion rate from 0.152 to 0.004 mm per year. Thermodynamic and kinetic parameter verification indicates the decreasing of spontaneity and corrosion rate by existence of ZDTP16 inhibitor. Gibbs free energy transition corrosion of Cu metal in electrolyte medium is measured in corrosion simulator increased from +85.22 to +91.77 kJ mol-1, while its activation energy increased from +16.66 to +33.68 kJ mol-1. Morphology observation of Cu metal substrate surface using SEM-EDX shows that the adsorption of ZDTP16 at substrate surface is able to protect surface from corrosion indicated by the existence of Zn, P, S, and C constituents representing composer atoms of ZDTP16, and the decreasing of Cl- corrosive constituent at substrate surface.

Performance of Zinc-Difattyalkyldithyocarbamate as Anti-Friction/Anti-Wear Lubricant Additives Komar Sutriah; Zainal Alim Mas’ud; Tun Tedja Irawadi; Mohammad Khotib
Indonesian Journal of Chemistry Vol 14, No 1 (2014)
Publisher : Universitas Gadjah Mada

Dithyocarbamate is an organosulphur compound that has long been known and widely applied in various fields, including in agriculture and industry. Several variants of synthesized vegetable oil-based Zinc-difattyalkyldithyocarbamate were tested its anti-friction/anti-wear performance on four ball machine using the method of ASTM-D2783. Anti-friction/anti-wear test to six of additive variants of Zinc-difattyalkyldithyocarbamate at doses of 1.2% indicated that all variants of the product has welding point value higher than the lube base oil lubricant HVI 60, and from US Steel 136 standard for Hydraulic lubricants, but only two additive variants of Zinc-bis(lauryl palmityl)dithyocarbamate and Zinc-bis(lauryl oleyl)dithyocarbamate which has a larger load wear index value than the standard, and meet the criteria as an additive extreme pressure according to US steel 136 standard. Zinc-bis(lauryl palmityl)dithyocarbamate is an additive variant with the best performance, meet bi-functional lubricant additives criteria, as anti-friction/anti-wear and antioxidant additive.

Kompatibilitas Nanokristal Selulosa Termodifikasi Setrimonium Klorida (CTAC) dalam Matriks Poliasam Laktat sebagai Material Pengemas Nina Hartati; Tetty Kemala; Komar Sutriah; Obie Farobie
Jurnal Kimia Sains dan Aplikasi Vol 22, No 4 (2019): Volume 22 Issue 4 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Pertumbuhan jumlah penduduk meningkatkan konsumsi plastik nonbiodegradable yang menyebabkan penumpukan sampah. Pengalihan bahan plastik dari yang tidak dapat terurai dengan plastik yang mudah terurai penting dilakukan. PLA merupakan polimer plastik yang mudah terurai namun bersifat rapuh. Limbah industri minyak kelapa sawit yang berupa tandan kosong kelapa sawit memiliki potensi sebagai reinforcement material karena kandungan selulosanya sebesar 30-40%. Perkecilan ukuran menjadi skala nano akan meningkatkan luas permukaan dan kemampuan dispersi selulosa ke dalam matriks PLA, sehingga meningkatkan kompatibilitas ditinjau dari sifat mekanik dan morfologi permukaan pada kompositnya. Hidrolisis asam kuat selulosa dan sentrifugasi pada kecepatan 5000 rpm berhasil mendapatkan nanokristal selulosa dengan persen kristalin sebesar %. Ultrasonikasi nanoselulosa kristalin menghasilkan partikel dengan diameter rerata 7,967 nm. CTAC sebagai agen solubilizer dan pemodifikasi permukaan berhasil membentuk interaksi dengan nanokristal selulosa yang terekam pada bilangan gelombang 2850 cm-1, 2960 cm-1 dan 720 cm-1. Nanokristal selulosa yang dimodifikasi CTAC membentuk komposit CNCs-PLA dengan sifat mekanik yang lebih baik dari PLA murni. Pada jumlah CTAC tetap 0,2 mol, sifat mekanik komposit CNC-PLA terbaik diperoleh pada komposisi rasio 90 : 10 dengan kekuatan tarik 26,295 MPa, perpanjangan putus 68,18%, dan keteguhan tarik 0,387 Gpa. Semakin besar konsentrasi CTAC yang memodifikasi nanokristal selulosa, semakin rendah nilai kekuatan tarik dan perpanjangan putusnya. Hasil karakterisasi morfologi permukaan, menunjukkan adanya degradasi pada permukaan PLA yang menyebabkan penurunan sifat mekanik komposit tersebut.

Antigout Activity of The Spatholobus littoralis Hassk. Extract Fractions Against Xanthine Oxidase: Its Metabolite Profile and Inhibition Kinetics Rut Novalia Rahmawati Sianipar; Komar Sutriah; Dyah Iswantini; Trivadila; Suminar Setiati Achmadi
HAYATI Journal of Biosciences Vol. 31 No. 1 (2024): January 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.1.1-20

The Spatholobus littoralis Hassk. (S. littoralis Hassk.) is a native plant in Indonesia and has been widely used in traditional Dayaknese medicine for non-communicable degenerative diseases. One of these illnesses, known as gout, is caused by excessive uric acid in the blood, which is the catalytic byproduct of a xanthine oxidase (XO) enzyme. In this work, we investigated the inhibition kinetics of XO and identified bioactive compounds from the stem extract fractions of S. littoralis Hassk. using liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS). Fractionation was carried out to obtain n-hexane, dichloromethane, and 1-butanol fractions from the water and 70% ethanol extracts. Fraction of 1-butanol from 70% ethanol and water extract displayed potent inhibitors of XO with IC50 value 116.91±3.51 and 137.15±5.00 mg/L, respectively. Lineweaver-Burk plot analysis showed that the 1-butanol fraction from the two extracts inhibited XO competitively. The 1-butanol fraction from the two extracts has been further identified as a bioactive fraction. The majority of the compounds in the two active fractions were phenolics. These findings revealed that the 1-butanol fraction from the two extracts is promising as an antigout treatment in the future.

SURFAKTAN BERBASIS MINYAK SAWIT UNTUK APLIKASI EOR PADA LAPANGAN MINYAK INTERMEDIET Hestuti Eni; Komar Sutriah; Sri Muljani
Lembaran Publikasi Minyak dan Gas Bumi Vol. 51 No. 1 (2017): LPMGB
Publisher : BBPMGB LEMIGAS

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

Peningkatan produksi minyak tahap lanjut (EOR) perlu dilakukan pada lapangan minyak tua dengan kandungan minyak masih tinggi. Injeksi kimia, khususnya surfaktan sebagai bagian dari aplikasi EOR sudah terbukti mampu meningkatkan perolehan minyak dari lapangan minyak tua. Dewasa ini surfaktan berbasis minyak sawit mulai dikembangkan. Selain surfaktan ini mampu menurunkan tegangan antarmuka sebagaimana yang dipersyaratkan surfaktan sebagai chemical EOR, ketersediaan minyak sawit yang melimpah dan merupakan bahan baku yang terbarukan juga menjadi alasan mengapa dilakukan penelitian sintesa surfaktan berbasis minyak sawit untuk aplikasi EOR ini. Beberapa surfaktan berbasis minyak sawit disintesa, yaitu surfaktan MES, BES dan PDS. Ada tiga varian surfaktan PDS yaitu PDSH1, PDSH2 dan PDSH3. Parameter uji screening seperti kompatibilitas, tegangan antarmuka (IFT), ¿ ltrasi, dan ketahanan panas dilakukan sebelum diaplikasikan pada lapangan minyak intermediet. Dari kelima varian surfaktan, didapatkan formula terbaik 1% surfaktan PDSH3 yang memenuhi kriteria pada uji screening. Karakterisasi FTIR dan analisa gravimetri thermal dilakukan untuk menentukan gugus fungsi sulfonat dan mengukur degradasi perubahan massa surfaktan terhadap panas. Uji injeksi kimia skala laboratorium dilakukan untuk mengetahui seberapa besar peningkatan perolehan minyak yang dihasilkan.

Quantitative Structure-Activity Relationship Study of Fatty Acid Derivatives as Lubricant Additive Sugesti, Rahmawita; Sutriah, Komar; Khotib, Mohammad
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 1 (2024): Jurnal Rekayasa Kimia & Lingkungan (June 2024 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i1.27374

Fatty acid compounds and their derivatives have been known in tribology as a source of bio-lubricant raw materials. New compounds were developed computationally to sort out the physical properties of the desired lubricant additive before synthesis in the laboratory. In this study, the correlation between the chemical structure of fatty acid derivative compounds and their physical properties through the quantitative structure-activity relationship (QSAR) using the density functional theory (DFT) was determined. QSAR model resulted in two linear regression equations for the wear rate performance test at (1) the value of the weld load with 5%, 500N variation and (2) the value of the wear scar diameter 5%, 150N variation. Validation of the regression model was conducted using the leave-one-out (LOO) method. The new additive lubricants were designed using the obtained QSAR models of the wear rate performance test with the descriptor of total energy, dipole moment, and softness. Stearoyl diethanolamine compound was proposed as a lubricant additive with the best performance parameter of weld load and wear scar diameter at 298.03 kg and 0.29 mm respectively. The percentage performance of stearoyl diethanolamine for weld load and wear scar diameter was increased by 24.18% and 47.60%, respectively.

Adsorption of Methylene Blue by Graft Copolymer Acrylamide onto Pineapple Peel Cellulose with the Addition of Activated Carbon Microwave-Assisted Permatasari, Putri; Sutriah, Komar; Khotib, Mohammad
Jurnal Rekayasa Kimia & Lingkungan Vol 18, No 1 (2023): Jurnal Rekayasa Kimia & Lingkungan (June, 2023 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i1.26894

Cationic dyes such as methylene blue are among the most widely used dye in the textile and paper industry. The dye waste produced causes environmental pollution and is harmful to human health. Thus, wastewater treatment becomes an important aspect of reducing this problem. Adsorption is a very effective method for treating various wastewaters due to its high selectivity and capacity. This study aims to prepare an adsorbent from graft copolymer acrylamide onto cellulose with the addition of activated carbon microwave-assisted and to test its performance as an adsorbent for methylene blue. The adsorbent synthesis was carried out using a microwave-assisted graft copolymer technique. The graft of acrylamide onto cellulose with the addition of activated carbon was carried out at various times (3, 4, and 5 minutes). Based on the FTIR spectra characterization of the adsorbent, the functional groups are C=O and N-H, and SEM analysis shows that the surface forms an interconnected network. At 3, 4, and 5 minutes of irradiation, grafting ratios were 329.72, 128.00, and 150.12, with grafting efficiency of 99.74, 72.94, and 78.02%. The maximum adsorption capacity of the adsorbent on methylene blue was 14.00, 6.04, and 9.97 mg/g, respectively, following the Langmuir isotherm model and pseudo second order kinetics. The experimental results show that the adsorbent can effectively remove or eliminate methylene blue in an aqueous solution.

Co-Authors . TRIVADILA Charlena Denar Zuliandanu Dodi Irwandi Dyah Iswantini Eko Prasetyo Fatika, Siti Gustini Syahbirin Hestuti Eni Hestuti Eni Iswara, Muhammad Dicky M. Syamsul Maarif Mohammad Khotib Muhammad Khotib Muljani, Sri Muljani, Sri Nina Hartati Obie Farobie Pitaloka, Adinda Putri Permatasari Putri Permatasari, Putri Putri, Silvia Devi Eka Rut Novalia Rahmawati Sianipar Shabrina Shabrina, Shabrina Sri Mulijani Sri Muljani Sugesti, Rahmawita SUMINAR SETIATI ACHMADI Tetty Kemala Tun Tedja Irawadi Tun Tedja Irawadi Zainal Alim Mas'ud Zainal Alim Mas’ud Zainal Alim Mas’ud Zainal Alim Mas’ud

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