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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Alchemy : Journal of Chemistry Teknosains: Media Informasi Sains dan Teknologi Jurnal Sains Teh dan Kina Al-Kimia Chimica et Natura Acta Walisongo Journal of Chemistry Jurnal Kesehatan Panrita Husada Jurnal Fisika dan Terapannya Amina
Aisyah Aisyah
Jurusan Kimia, Fakultas Sains Dan Teknologi, Univesitas Islam Negeri Alauddin Makassar, Makassar, Indonesia, 92118
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Al-Kimia

 1   2 
Produksi Etil Ester Dari Minyak Dedak Padi (Oryza Sativa) Menggunakan Reaktor Ultrasonik Aisyah Aisyah; Riskayanti Riskayanti; Iin Novianty; Asriyani Ilyas; Sjamsiah Sjamsiah; Sitti Chadijah
Al-Kimia Vol 6 No 1 (2018): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v6i1.3036

Abstract

Indonesia as the third largest grain producer in the world produces large amounts of bran. High contain Free Fatty Acid (FFA) in rice bran oil causes it can be converted into the fatty acid ethyl esters (biodiesel) by esterification and transesterification methods. The rice bran oil was obtained by rice bran extraction using n-hexane. The esterification process was catalyzed by HCl. In this study, the transesterification process to convert triglycerides into ethyl esters (biodiesel) was conducted by the addition of KOH as a neutralizer and a catalyst Oil and ethanol by ratio 1:6 using 0,5% KOH  as catalysator were reacted by utilizing 47 kHz ultrasonic wave for 45, 60 and 75 minutes. Biodiesel conversion value obtained were 49,23%; 70,55% and 52,04% respectively. Biodiesel product spectrum was analyzed using FTIR and GCMS instrument. The density, viscosity and flash point is also measured.  FTIR analysis on all variations give similar data spectrum, where the ethyl ester products are characterized by typical bands at specific frequencies such as -C=O; -C-C; -C-H (sp3) and = C-H (sp2) stretch. Based on the data from GCMS spectrum, the product components are ethyl palmitate, ethyl linoleate, ethyl stearate and ethyl oleate. 
Pengaruh Kandungan Senyawa pada Ekstrak Daun Ketapang n-Heksan, Etil Asetat, Metanol dan Campuran Terhadap Nilai Efisiensi Dye Sensitized Solar Cell (DSSC) Aisyah Aisyah; Kurnia Arini Putri; Suriani Suriani; Iswadi Iswadi
Al-Kimia Vol 5 No 2 (2017): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i2.3856

Abstract

The needs of electrical energy that increase year by year cause electrical energy crisis. Alternative energy sources which are potential to be developed as a substitute of fossil fuels are organic solar cells or DSSC (Dye Sensitized Solar Cell). The purpose of this study is to determine the value of efficiency resulting from Ketapang leaf extract and to determine the effect of compound content in Ketapang leaf extract toward the value of DSSC efficiency. This study investigate the efficiency value of the DSSC which are senzitized by the N-hexane, ethyl acetate, methanol extract of the Ketapang leaf and the mixture extract. The compounds from each axtract are characterized used UV-Vis and FTIR. The measurement results of the efficiency value from n-hexane of Ketapang leaf extract, ethyl acetate, methanol and the mixture were respectively 0.0051%, 0.09%, 0.12% and 0.22%. The results of UV-Vis characterization with maximum wavelength were respectively 667 nm, 665.9 nm, 665.9  nm and 209 nm. The FTIR identified an auxchrome group such as -OH,  C-N, -NH, and C-O as well as chromophore groups such as C=O and C=C. These data support that the existence of flavonoid and alcaloid compound in the mixture extract generate significant efficiency value.
The Photosensitizer from the Basic Dye Extract of the Skin Fruit of Eggplant (Solanum melongena L.) Indah Ayu Risnah; Aisyah Aisyah; Iswadi Iswadi; Jawiana Saokani
Al-Kimia Vol 6 No 1 (2018): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v6i1.4826

Abstract

The latest generation of solar cell that utilizes dye from plants as a photosensitizer is Dye-Sensitized Solar Cell (DSSC). The dye from Solanum melongena L. is one of the potential photosensitizers due to its chemical and physical characteristics.  This study aims to determine these characteristics as well as its efficiency value in DSSC. The dye was obtained by ultrasonic extraction in 1% HCl methanol solution. The crude extract of dye was treated in acid and basic condition and then separated by vacuum gravitation chromatography in a way that the polarity was increased. The results were a variety of dyes according to their polarity. The dye then applied in DSSC as the photosensitizers. The highest conversion value was 0.0211%, performed by the dye in pH 8 solution. The characteristic of this extract was identified by UV-Vis, FTIR, and GC-MS. All the spectral data indicated that the main component which responsible for this efficiency was pelargonidin. 
Co-Authors A. Reskianti Wardani Abd. Rasyid Syamsuri Achmad Nasyori Afandi, Irwan Alfia Patandungan Aminuddin Baharuddin Andi Nur Fitriani Abubakar Andi Nurfitriani Abu Bakar Arfiani Nur Asdinar Asriani Ilyas Asriyani Ilyas Awaluddin Iwan Perdana Didin Mujahidin Dyah Wulandhari Sulthan Firnanelty, Firnanelty Hajrah Hajrah Heri Heriyono Holyness Nurdin Singadimedja Iin Novianty Ilmi Wahyuni Indah Ayu Risnah Indah Ayu Risnah Irnaningsih Jawiana Saokani Jawiana Saokani Kurnia Arini Putri Maria Cecilia Lezama Escalante Maswati Baharuddin Maswati Baharuddin Melati Masri Muh. Said L Muh. Taufiq M. Bintang Muharam Bapa Lasang Nila Berghuis Tamaela, Nila Berghuis Nur Hasbi Wahab Nurlina Nurlina Nurul FA Patunrengi, Iswadi Ibrahim Rahmaniah Rahmaniah Rahmatia Syam Rahmawati Aziz Rahmiani Gani Riskayanti Riskayanti Saadatul Husna Sappewali Sappewali Siti Zubaidah Sitti Chadijah Sjamsiah, Sjamsiah St Chadijah Suriani Suriani Suriani Suriani Suriani Suriani Syamsidar HS Syarifah Rabiatul Adawiah Titik Andriani Ummi Zahra, Ummi Yana Maolana Syah Yulia Kirana Lahsmin Yunizar AL