Browsing A - Mathematics and Natural Sciences by Author "Gunawan, Rahmat"
Now showing items 1-13 of 13
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Adsorption of Cu(II) Ion in Aqueous Solution by Pseudomonas sp. Biosorbent
Setiawan, Acmad Dwi; Kartika, Rudi; Gunawan, Rahmat (AIP, 2021-10-12)Cu(II) waste pollution in the environment is commonly found in the electroplating industry. Cu(II) waste in the electroplating process has a high concentration of potential to pollute the environment, therefore it is ... -
INHIBISI XANTIN OKSIDASE OLEH FRAKSI ETIL ASETAT DARI DAUN JARUM TUJUH BILAH (Pereskia bleo (Kunth) DC) SEBAGAI ANTIHIPERURISEMIA
Sari, Prinka Susmita; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Atomik, 2018-08)ABSTRACT“Jarum Tujuh Bilah” leaves (Pereskia bleo(Kunth) DC) are a medicinal plant that often used in traditional medicine to reduce uric acid levels. This plant contains secondary metabolites which have the ... -
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, 2018-07)ABSTRACTArtificial photosynthesis modelling of Ca-Pc-PDI complexCaPhthalocyaninePerylenediimide),and dendrimer molecule using Density of Functional Theory (DFT) Method has been studied toshowed the energy ... -
PEMANFAATAN ABU BATUBARA SEBAGAI ZEOLIT YANG TERDEALUMINASI DALAM MENGADSORPSI FENOL
Pata, Agustinus; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Kimia Mulawarman, 2014-11)ABSTRACTA 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 ... -
PEMANFAATAN BIJI WANYI (Mangifera caesia Jack.) DALAM PEMBUATAN ETANOL SECARA HIDROLISIS ENZIMATIS DAN FERMENTASI MENGGUNAKAN Saccharomyces cerevisiae
Arissah, Nur; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Atomik, 2020-08)Abstract : The utilization of wanyi seeds (Mangifera caesiaJack.) in making ethanol by enzymatic hydrolysis and fermentation using Saccharomyces cerevisiaehas been carried out. The method used is the hydrolysis ... -
PEMANFAATAN FRAKSI ETANOL DAUN JARUM TUJUH BILAH (Pereskia bleo (Kunth) D.C) SEBAGAI INHIBITOR XANTIN OKSIDASE DALAM PEMBENTUKAN ASAM URAT
Sarwawan, Ade Putri; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Atomik, 2019-03)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 ... -
Pembuatan dan Karakterisasi Rochelle Salt Crystal
Al Asyrafi, M. Wafieq Akbar; Gunawan, Rahmat; Natalisanto, Adrianus Inu (Prodi Fisika FMIPA Unmul, 2021-06)Rochelle Salt is the first synthesis Crystal made by Pierre Siegnette La Rocchelle in France. Rochelle Salt has several characteriztion, one of characterization is piezoelectric effect where the crystal can change the ... -
PENGGUNAAN MONOMER NAFION SEBAGAI PEMBAWA PROTON (H+) DENGAN METODE TEORI FUNGSI KERAPATAN
Alhabib, Albar; Gunawan, Rahmat; Sitorus, Saibun (Jurnal Kimia Mulawarman, 2014-11)ABSTRACTResearch 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 ... -
PENGGUNAAN SPEKTROFOTOMETER UV DAN HPLC PADA ANALISIS KANDUNGAN KAFEIN KOPI ARABIKA DAN ROBUSTA
Prasetyo, Dedy; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Atomik, 2020-06)Analysis of caffeine content in Arabica coffee and Robusta coffee using Ultra Violet (UV)spectrophotometersand High Performance Liquid Chromatography (HPLC)was carried out. Coffee samples were ... -
PENURUNAN KONSENTRASI FENOL PADA AIR LAUT BALIKPAPAN YANG TERCEMAR MINYAK MENGGUNAKAN METODE ADSORPSI
Yulianto, Muhammad; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Atomik, 2020)Research on decreasing of phenol concentration in the Balikpapan seawater polluted by using the adsorption method, the purpose of this study was to determine the characteristics of activated carbon and adsorption percentto ... -
Pyrolysis of Green Microalgae by Thermogravimetric Analysis (TGA) and TG-FTIR
Subagyono, RR Dirgarini J N; Miten, Polonius; Gunawan, Rahmat; Nugroho, Rudy; Chaffee, Alan; Marshall, Marc (AIP Publishing, 2022-10-11) -
STUDI KUANTUM FARMAKOLOGI SENYAWA TURUNAN SULFONAMIDA2,4 DIAMINO 6 QUINAZOLINE SEBAGAI ANTIMALARIA DENGANMENGGUNAKAN METODE AB INITIO
Alfadilil, Bobi R; Sitorus, Saibun; Gunawan, Rahmat (Jurnal Kimia Mulawarman, 2014-05)ABSTRAKTelah diterapkan metode berbasis Ab-Initio dalam suatu analisa QSAR (Quantum Structure ActivityRelationship) untuk dapat membuktikan dimana letak pusat aktif senyawa sulfonamida yang telahdiketahui nilai persen ... -
STUDIMOLEKULKITOSANSEBAGAIMEMBRANPENGHANTARPROTON(H+)DENGANMETODEABINITIO
Wibowo, Arif Ari; Gunawan, Rahmat; Sitorus, Saibun (Jurnal Kimia Mulawarman, 2019-11)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. ...