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Jurnal Ilmiah Sains
Published by Universitas Sam Ratulangi
ISSN : 14123770     EISSN : 25409840     DOI : https://doi.org/10.35799/jis.v22i2.40961
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Mathematics Physics
Jurnal Ilmiah Sains (Journal of Scientific Sciences) is the Journals Published by Faculty of Mathematics and Natural Sciences, Sam Ratulangi University. Jurnal Ilmiah Sains Published Twice a Year, i.e April and October. Jurnal Ilmiah Sains  welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Mathematics Statistics Computer Science Physics Chemistry Biology
Arjuna Subject : Umum - Umum
Articles 12 Documents
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Search results for , issue "Volume 17 Nomor 1, April 2017" : 12 Documents clear
AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL DARI DAUN SOYOGIK (Saurauia Bracteosa DC.) Marfel G.D. Muaja; Max R.J. Runtuwene; Vanda S. Kamu
JURNAL ILMIAH SAINS Volume 17 Nomor 1, April 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (585.725 KB) | DOI: 10.35799/jis.17.1.2017.15614

Abstract

AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL DARI DAUN SOYOGIK (Saurauia Bracteosa DC.) ABSTRAKPenelitian ini bertujuan untuk mempelajari akivitas antioksidan dari ekstrak metanol daun Soyogik (Saurauia Bracteosa DC.). Daun Soyogik diekstraksi dengan metode maserasi menggunakan pelarut metanol. Ekstrak pekat kemudian dilakukan pengujian aktivitas antioksidan dengan metode DPPH. Hasil penelitian menunjukkan bahwa ekstrak metanol daun Soyogik memiliki nilai IC50­ sebesar 0,16 ppm.Kata Kunci: Saurauia Bracteosa DC., Ekstrak Metanol, Antioksidan, Nilai IC50. ANTIOXIDANT ACTIVITY OF METHANOL EXTRACT FROM SOYOGIK (Saurauia Bracteosa DC.) LEAVES ABSTRACTThis research aims to study on the antioxidant activity of methanol extract from Soyogik (Saurauia Bracteosa DC.) leaves. Soyogik leaves extracted by maceration method using methanol. Concentrated extract then testing the antioxidant activity by DPPH method. The results showed that the methanol extract of leaves Soyogik have IC50 value of 0.16 ppm.Keywords­: Saurauia Bracteosa DC., methanol extract, Antioxidant, IC50 value
PEMANFAATAN KARBON AKTIF DARI BAMBU SEBAGAI ELEKTRODA SUPERKAPASITOR Farly Tumimomor; Akhiruddin Maddu; Gustan Pari
JURNAL ILMIAH SAINS Volume 17 Nomor 1, April 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.516 KB) | DOI: 10.35799/jis.17.1.2017.15802

Abstract

PEMANFAATAN KARBON AKTIF DARI BAMBU SEBAGAI ELEKTRODA SUPERKAPASITOR ABSTRAKPada penelitian ini, karbon aktif berbasis bambu telah digunakan untuk pembuatan superkapasitor. Uji daya jerap iodin dilakukan untuk mengukur tingkat serapan pori sampel karbon aktif yang ukurannya relatif kecil (mikropori). Karakteristik bahan karbon aktif yang meliputi struktur kristal dan morfologi permukaannya diuji dengan menggunakan SEM dan XRD. Bahan elektroda dengan komposisi (Karbon aktif : PVDF = 9:1 (b/b)), kolektor arus dan separator telah dirangkai untuk diuji kinerjanya sebagai perangkat penyimpanan muatan listrik. Metode siklik voltametri digunakan untuk melihat kinerja perangkat superkapasitor dengan mengukur nilai kapasitansi spesifik berdasarkan kurva voltammogram. Berdasarkan hasil perhitungan nilai kapasitansi spesifik diperoleh nilai kapasitansi spesifik tertinggi pada superkapasitor dengan elektroda bambu yang diaktivasi dengan steam 50 mL/bar yaitu sebesar  59.50 F.Kata kunci: Karbon aktif bambu, siklik voltametri, kapasitansi spesifik, superkapasitor.  UTILIZATION OF BAMBOO BASED ACTIVATED CARBON AS SUPERCAPACITOR ELECTRODE ABSTRACT In this study, bamboo based activated carbon has been used for fabrication of supercapacitors. Iodine absorption test is performed to measured absorption level porous activated carbon sample size is relatively small (microporous). Characteristics of the activated carbon material covering the surface morphology and structure were tested using SEM and XRD. Electrode materials with composition (Activated charcoal: PVDF = 9: 1 (w / w)), the current collector and separator has been assembled to be tested its performance as an electrical charge storage device. The test results by cyclic voltammetry method was to look at the performance supercapacitor devices at once to obtain the value of the capacitance curve obtained voltammograms. Based on the results of the calculation of the capacitance, the highest capacitance values obtained in the supercapacitor with activated carbon electrodes in bamboo steam 50 mL / bar with a capacitance value is 59.50 F / g.Keywords: Bamboo activated carbon, cyclic voltammetry, the specific capacitance, supercapacitor.

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