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All Journal Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Jurnal Sains dan Pendidikan Fisika Alchemy : Journal of Chemistry Teknosains: Media Informasi Sains dan Teknologi Indonesia Chimica Acta Al-Kimia Jurnal Fisika dan Terapannya
Patunrengi, Iswadi Ibrahim
Jurusan Fisika, Fakultas Sains Dan Teknologi, Univesitas Islam Negeri Alauddin Makassar, Makassar, Indonesia, 92118
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Energy Materials Science & Nanotechnology Physics

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PEMANFAATAN LIMBAH CANGKANG KEONG SAWAH (Bellamya javanica) UNTUK SINTESIS HIDROKSIAPATIT DENGAN MODIFIKASI PORI MENGGUNAKAN PATI UBI JALAR Indriani, Yunida; Iswadi, Iswadi; Fuadi, Nurul
JFT : Jurnal Fisika dan Terapannya Vol 5 No 2 (2018): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v5i2.16111

Abstract

The research has been carried out by utilizing pore conch shell waste using sweet potato starch to make porous Hydroxyapatite using porogen sweet potato starch by precipitation method and to determine the bioactive properties of apatite hydroxy and the growth of apatite crystals using Simulated Body Fluid (SBF). This study used wet precipitation method. The results of the analysis  using XRD show that the HAp phase has been formed. The morphology of HAp based on SEM results shows that HAp pores modification is produced in the composition of HAp added with 20% sweet potato starch with 6 hour sonication wich results in pore size from the range 0,23-3,37 µm. This result is not correlate with the theory that the best pore modification is produced in the composition of HAp added with 30% starch. This is because there are difference characters of each sweet potato used. The result of in vitro tests on synthesis HAp samples and 7 days porous HAp have shown the growth of apatite crystals in SBF solution media (Simulated Body Fluid).
RANCANG BANGUN PENYARING AIR OTOMATIS Mabrur, Mabrur; Iswadi, Iswadi; Said L, Muh
JFT : Jurnal Fisika dan Terapannya Vol 2 (2015): Desember
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v2i0.16893

Abstract

This research aims to design and design an automatic water filter and test the quality of the filtered water using an automatic filter that has been designed. The quality of the filtered water is viewed from physical and chemical parameters, both parameters are measured and observed directly at the Modern Physics Laboratory of the Faculty of Science and Technology and the Physical Chemistry Laboratory of the Faculty of Science and Technology. Based on the results of the study, it was found that the results of water quality in an automatic water filter with proof of two different samples showed that the water produced was not maximal because it had a high conductivity value and a pH value that was in the acid category. Because the water pressure that enters the filter media is too large it can stir / destroy the top layer of the filter so that the top filter cannot filter out impurities optimally.
Sistem Pengolahan Air Laut Menjadi Air Minum Menggunakan Tenaga Matahari Iswadi Iswadi; Aisyah Aisyah
Al-Kimia Vol 1 No 2 (2013): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.602 KB) | DOI: 10.24252/al-kimia.v1i2.1632

Abstract

Has done research about the system of purification of sea water into drinking water using solar energy. Utilization of solar energy as power naturally adopts the system of evaporation that occurs in a siklur water. Design and construction of tools created in the shape of a pyramid so that the absorption of thermal energy from the Sun can be maximum. Methods of work of the system is very simple, namely the souls imprisoned in the air that the pyramid would experience an increase in temperature significantly along with the searing Sun. The temperature of the hot air in the space pyramid is causing sea water which is at the bottom (floor) pyramid will evaporate and stick on the wall side of the inside of the pyramid. With the help of gravity, the water vapour will fall in the form of green ears water down the wall of the pyramid. The water will flow through the channel leading into the shelter is. This water is not already contain salt and pure water is so that it can be consumed directly. The results showed that the pyramid with size 160 cm x 160 cm 3 mm fiberglass-wall capable of producing fresh water as much as 2,100 mL. These results have been tested in the laboratory with a result salinity = 0,0 at T = 29,4 °C; TDS = 11 mg/L, 22.2 ms/cm conductivity, at T = 29.3 °C, no taste and no smell.
Analisis Linearitas Keluaran Radiasi pada X-Ray Mobile dengan Menggunakan Piranha Nur Mukminah R; Iswadi Iswadi; Ihsan Ihsan Ihsan
Al-Kimia Vol 2 No 1 (2014): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (491.064 KB) | DOI: 10.24252/al-kimia.v2i1.1640

Abstract

The research was conducted on the linearity of the output radiation in the mobile X-ray by using Piranha. This study aimed to measure the radiation dose exposure, to determine the relationship between the increase in the voltage of the radiation dose exposure and increase the tube current to the radiation dose exposure, as well as to analyze the radiation output and linearity of the output radiation. Data collection was conducted at the Dr. Tadjuddin Chalid Hospital Makassar in radiological installation. In this study the variables that measured the radiation dose and exposure variables that change the tube current and voltage. The data obtained and analyzed to calculate the value of the output radiation and radiation output linearity in the X- ray mobile. The analysis showed that the X-ray mobile with GE brand that are in radiological installation Dr. Tadjuddin Chalid Hospital has good linearity.
Photosenzitizer dari Fraksi Metanol: N-Heksana Buah Cabe Merah (Capsiccum Annum L.) Muh Shiddiq Maming; Aisyah Aisyah; Suriani Suriani; Iswadi Iswadi
Al-Kimia Vol 5 No 1 (2017): 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.v5i1.2846

Abstract

A research has been done on the dye components from the extract of red pepper (Capsiccum annum L) which is potentially used as photosensitizer. This study aims to determine the efficiency and the characteristics of the dye. The efficiency is measured on a cell made of glass ITO 100 Ω and a technical semiconductor TiO2. The pepper extract obtained from the ultrasonic maceration by methanol which then purified using a chromatography column using the ratio of 1: 4, 1: 1 and 4: 1 methanol:n-hexane. The results showed that the efficiency of the crude extract, fraction by ratio of 1:4; 1: 1 and 4: 1 are respectively 0.027%, 0.012%, 0.013% and 0.034%. Subsequently, the best efficiency fraction was characterized by using FTIR, UV-Vis and GC-MS. The wavelength of visible light obtained at 466 and 443 nm which is corresponds to the wavelength of carotene. The components indicate absorption  at 1631.78 cm-1, 3008.95 cm-1 and 2992 cm-1 that are characteristic of carotenoid whereas, that of 1739 cm-1 and 3446.79 cm-1  are carbonyl and hydroxyl group of xantofil. According to the GC-MS fragmentation pattern, the carotenoid compounds identified by mass abundace at 91 and 105.
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.
A Natural Dye-Sensitized from Pare (Bitter Gourd) Leaves Extracts for Dye-Sensitized Solar Cell (Dssc) Wahidah Febriya Ramadhani; Suriani S Suriani S; Aisyah A Aisyah A; Iswadi I Iswadi I
Al-Kimia Vol 7 No 1 (2019): 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.v7i1.6309

Abstract

The availability of energy sources is dwindling so a renewable energy which has a  potential chance to be developed, such as solar panels, is needed.  The use of solar panels is still quite expensive in terms of manufacturing process. For this reason, a cheap solar panel based is developed, and it is called DSSC (Dye-Sensitized Solar Cell). The use of DSSC is developed in Indonesia, a country which is famous for its biological richness. In this study, pare leaves were used as photosensitizers obtained from the extraction process of maceration by various solvents. The DSSC test was done on four extracts including N-hexane extract, Ethyl Acetate, Methanol, and Combination of the three extracts. The highest value of efficiency obtained from each extract respectively are 0,03%, 0,04%, 0,14% and 0,30%. Characterization was done by examining the UV-Vis and FTIR spectral data. The result of UV-Vis analysis shows that wavelength for N-hexane, Ethyl Acetate, Methanol, and Combined extracts are 269,1 nm, 668,0 nm, 663,9 nm, and 6631 nm, respectively. FTIR results found that the chromophore and auxochrome groups were identified on all four tested extracts, namely; C = C, C = O, -OH, and -C-H groups.  
PENGUKURAN INTENSITAS RADIASI YANG DIPANCARKAN OLEH HANDPHONE DAN PENGARUHNYA TERHADAP KESEHATAN Hartina Hartina; Iswadi Iswadi; Muh. Said L
Teknosains Vol 8 No 1 (2014): JANUARI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v8i1.109

Abstract

The research was conducted by taking a sample of 25 pieces of cell phone. Mobile radiation intensity measured electromagnetic waves are receiving phone calls. Measurements were made by placing two headphone in a different room with a range of ± 20 meters. Tool used to measure the intensity of radiation of electromagnetic waves emitted by mobile phone radiation is a measure C32-QX5. Values were collected before phone calls and performed on two conditions after receiving the phone call is a normal condition and the condition of the loudspeaker. The purpose of this study was to determine the intensity of the electromagnetic radiation emitted by mobile phones with different brands and types and determine their effects on health. Results showed that all cell phones that have measured the intensity of the radiation was still safe to use because it has an average radiation intensity 6 mW/cm2, which limits the intensity of radiation that can be tolerated by the body is equal to 10 mW/cm2. The use of mobile phones continuously for one hour a day in the ten-year timeframe, estimated the value of the intensity of radiation received by the body tissue will exceed safe limits.     
PENGARUH KONSENTRASI PIGMEN WARNA DARI DAUN PACAR KUKU (Lawsonia inermis L.) TERHADAP EFISIENSI DYE SENSITIZED SOLAR CELL (DSSC) Yulia Kirana Lahsmin; Iswadi Iswadi; Aisyah Aisyah; Rahmaniah Rahmaniah
Teknosains Vol 12 No 2 (2018): JULI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v12i2.7598

Abstract

There was research on Dye Sensitized Solar Cell to determine the effect of concentration Henna (Lawsonia inermis L.) leaves pigments on the efficiency of DSSC. The solar cell is made with a sandwich structure, the dye used is made in three variations of concentration is concentration of 10%, 20% and 30%. TiO2 deposition on ITO glass made using the method of doctor blade with a cell area of 2.25 cm2 for 24 hours of immersion in the dye. Based on the results of measurements of IV by using a source of light, DSSC efficiency for dye obtained with a concentration of 30% which is 0.003366667%, to dye with a concentration of 20% is 0.0033264% and to dye with a concentration of 10% which is 0.000312%. This research can be concluded that the higher the concentration of dye used, the higher the efficiency of DSSC generated.
PENGARUH KANDUNGAN SENYAWA PADA EKSTRAK DAUN JATI (Tectona grandis) TERHADAP NILAI EFISIENSI DYE SENSITIZED SOLAR CELL (DSSC) Muharam Bapa Lasang; Aisyah Aisyah; Iswadi Iswadi; Andi Nurfitriani Abu Bakar
Teknosains Vol 13 No 1 (2019): JANUARI
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v13i1.9615

Abstract

Abstrak        Dye Sensitized Solar Cell (DSSC) merupakan salah satu sumber energi alternatif yang berkelanjutan dan ramah lingkungan. Beberapa zat warna dari tumbuhan lokal Indonesia diketahui berpotensi sebagai sensitizer. Penelitian ini mengevaluasi kemampuan komponen zat warna dari daun jati berikatan dengan semikonduktor TiO2 untuk mengkonversi energi matahari menjadi energi listrik. Daun jati diekstrak dengan maserasi menggunakan pelarut  n-heksan etil asetat dan metanol. Nilai efisiensi DSSC diukur dari ketiga ekstrak ditambah dengan campuran dari ketiga ekstrak tersebut. Data spektrum zat warna dimonitor menggunakan spektrofotometer FTIR dan UV-VIS. Data spektrum menunjukkan adanya senyawa flavonoid, alkaloid dan terpenoid dalam ekstrak campuran yang menghasilkan serapan panjang gelombang maksimal khas pada daerah 500-650 nm dan 269 nm. Nilai efisiensi DSSC diukur dari ketiga ekstrak dan campuran dari ketiga ekstrak tersebut. Nilai efisiensi dari ke empat sampel berturut-turut yaitu 0.0068%, 0.03%, 0.06%, dan 0.34%. Hal ini menunjukkan bahwa semakin banyak kandungan zat warna yang terikat pada TiO2 semakin tinggi nilai efisiensi DSSC.
Co-Authors Abd. Rasyid Syamsuri Abubakar, A. Nur Fitriani Abubakar, A. Nurfitriani Achmad Nasyori Afandi, Irwan Aisyah Aisyah A Aisyah A Aisyah Aisyah Aisyah Aisyah Aisyah Aisyah Alimuddin, Arni Almukarrama, Almukarrama Andi Nurfitriani Abu Bakar Arfiani Nur Asriyati Asriyati, Asriyati Awaluddin Iwan Perdana Buety, Ahmad Elfrida Ratnawati Elisabeth Supriyatni Firnanelty, Firnanelty Halisa, Halisa Hartina - Hartina Hartina Hasanah, Andi Uswatun Heri Heriyono Ihsan Ihsan Ihsan Ilmi Wahyuni Imran, Dzulqadri Indriani, Yunida Jusnia, Jusnia Kurnia Arini Putri Kurnia Ramadani Mabrur, Mabrur Maswati Baharuddin Muh Shiddiq Maming Muh. Said L Muhammad Sayuthi Muharam Bapa Lasang Najatul Ula Nur Mukminah R Nurul FA Nurul Fuadi Rahmaniah Rahmaniah Rezeki, Rezeki Suriadi Suriani Suriani S Suriani S Suriani Suriani Suriani Suriani Teguh Santoso Ummi Zahra, Ummi Wahidah Febriya Ramadhani Yulia Kirana Lahsmin Zelviani, Sri