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All Journal Journal of Aceh Physics Society Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Ilmu Fisika Jurnal Teori dan Aplikasi Fisika Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Journal of Applied Agricultural Science and Technology Jurnal Natural Teknologi dan Industri Pertanian Indonesia PESARE: Science and Engineering Service Journal
Evi Yufita
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Syiah Kuala Jl. Syekh Abdul Rauf, Darussalam, Banda Aceh 23111, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Neuroscience Physics Public Health Social Sciences

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The Potential of Red Dragon Fruit Skin (Hylocereanea Polyrhizus) as a Corrosion Inhibitor Beti Nanda Sari; Evi Yufita; Zulfalina Zulfalina
Journal of Aceh Physics Society Volume 8, Number 1, January 2019
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (591.514 KB) | DOI: 10.24815/jacps.v8i1.12787

Abstract

Penelitian tentang pengaruh ekstrak kulit buah naga merah (Hylocereus Polyrhizus) sebagai bahan inhibitor terhadap laju korosi baja plat hitam (Base Plate) A36 dengan menggunakan metode weight loss telah dilakukan. Kulit buah naga merah berpotensi sebagai bahan inhibitor organik karena mengandung senyawa antioksidan diantaranya flavonoid dan tanin. Penelitian ini bertujuan untuk mengetahui pengaruh variasi volume larutan inhibitor yaitu 10, 20 dan 30 ml terhadap perubahan massa sampel, selain itu juga ingin mengetahui pengaruh variasi volume larutan inhibitor terhadap nilai laju korosi dan efesiensi inhibisi pada sampel baja A36. Berdasarkan hasil penelitian, perubahan massa didapat dari selisih massa sebelum dan sesudah perendaman dalam larutan inhibitor, nilai perubahan massa maksimum pada volume 30 ml yaitu sebesar 0,073 g. Nilai laju korosi relatif untuk sampel yang dilapisi inhibitor akan semakin menurun, pada volume 30 ml yaitu sebesar 0,001 cm/tahun dengan nilai efisiensi sebesar 98%. Research on the effect of red dragon fruit peel extract (Hylocereus Polyrhizus) as an inhibitor material on the corrosion rate of A36 black plate steel using weight loss method has been carried out. Red dragon fruit skin potential as an organic inhibitor that is containing antioxidant compounds include flavonoids and tannins. This study aims to determine the effect of variations in inhibitor solution volume for 10, 20 and 30 ml on changes in sample mass, the effect of variation in inhibitor solution volume on corrosion rate value and inhibitor efficiency of A36 steel samples is also studied. Based on the results of the study, changes in mass were obtained from the difference in mass before and after immersion in an inhibitor solution, the maximum mass change value at a volume of 30 ml is equal to 0.073 g, while the value of the corrosion rate is relatively decreasing. At a volume of 30 ml, the corrosion rate is equal to 0.001 cm/year with an efficiency value of 98%. Keywords: Korosi, Antioksidan, Kulit, Buah Naga Merah, efisiensi
Effect of Ceremai Leaf Extract (Phyllanthus acidus (L) Skeels) as Inhibitor Material on Corrosion Rate of Black Plate Steel (Base Plate) A36 Zulfalina Zulfalina; Nurrizka Nadia; Evi Yufita
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Penelitian tentang pengaruh ekstrak daun ceremai (Phyllanthus acidus (L) Skeels) sebagai bahan inhibitor terhadap laju korosi baja plat hitam (Base Plate) A36 dengan menggunakan metode weight loss telah dilakukan. Penelitian ini bertujuan untuk menghitung nilai laju korosi sampel baja A36 dan efesiensi inhibitor dari ekstrak etanol daun ceremai. Pembuatan inhibitor dilakukan dengan mengekstrak daun ceremai menggunakan metode maserasi. Hasil ekstrak dicampurkan ke dalam medium korosif NaCl 3% dengan variasi ekstrak 4, 8, 12, 16 dan 20 ml, kemudian dilakukan perendaman sampel baja plat hitam A36 yang berukuran 3x1,5x0,114 cm. Berdasarkan hasil penelitian didapatkan nilai laju korosi minimum pada perendaman dalam medium korosif NaCl 3% yang ditambahkan 16 ml inhibitor dengan waktu perendaman 14 hari yaitu 0,0339 cm/tahun dengan nilai efisiensi sebesar 88%. The research about effect of ceremai leaf extract (phyllanthus acidus (l) skeels) as inhibitor material on corrosion rate of black plate steel (Base Plate) A36 by using weight loss method has been done. This study aims to calculate the value of corrosion rate of A36 black plate steel samples and the efficiency of inhibitors from ethanol extract of ceremai leaf. Making the inhibitor is done by extracting the leaves of the ceremai using the maceration method. The extract was mixed into corrosive medium of NaCl 3% with variation of 4, 8, 12, 16 and 20 ml, and then immersion of A36 black plate steel sample 3x1.5x0.114 cm. Based on the result of the research, the minimum corrosive rate on soaking in corrosive medium of NaCl 3% when added of 16 ml inhibitor with immersion time for 14 d that is 0,0339 cm/year, and the efficiency value equal to 88 %. Keywords: Corrosion, Corrosion Rate, Efficiency, NaClReferensiAli, Farida, dkk. 2014. Pengaruh Waktu Perendaman dan Konsentrasi Ekstrak Daun Jambu Biji (Psidium guajava, Linn) sebagai Inhibitor Terhadap Laju Korosi Baja SS 304 dalam Larutan Garam, Jurusan Teknik Kimia Fakultas Teknik Universitas SriwijjayaAsdim. 2007. Penentuan Efisiensi Inhibisi Ekstrak Kulit Buah Manggis (Garcinia mangostana L) pada Reaksi Korosi Baja dalam Larutan Asam. Jurnal Gradien. 3 (2) : 273-276.Cicek, volkan. 2014. Corrosion Engineering. Wiley. USA.Fatriah. 2016. Pengaruh Ekstrak Daun Trembesi (Samanea Saman (Jacq.) Merr.) Sebagai Bahan Inhibitor Terhadap Laju Korosi Baja Plat Hitam (Base Plate) A36. J. Aceh.Phys. Soc. Vol. 6, No. 2.Favre. 1993. The Influence of Gallic Acid on the Reduction of Rust on Painted Steel Surface. Journal Corrosion Science 43.1483-1492.Kayadoe, Victor dan Rachel Turalely. 2016. Ekstrak Daun Nipah sebagai Inhibitor Korosi Baja Ss-304 Dalam Larutan H2SO4. Prosiding Seminar Nasional Kimia dan Pembelajarannya, ISBN : 978-602-0951-12-6 Jurusan Kimia FMIPA Universitas Negeri Surabaya.Priest. D. 1992. Measuring Corrosion Rates Fast. J. Chemical Engineering, vol : 2 no. 1.Rieger. 1992. Electrochemistry, 2nd ed. Chapman and Hall Inc. New York.Setiawan, Dalimartha. 1999. Atlas Tumbuhan Obat Indonesia Jilid 1, Jakarta : Trubus Agriwidy
Identification of Adhesive Material Substance in Ancient Fortress Located at Aceh Besar using XRF Nurul Fitri; Elin Yusibani; Evi Yufita
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.49 KB)

Abstract

Penelitian ini bertujuan untuk menganalisa kandungan material perekat yang digunakan pada tiga benteng purba di kawasan Aceh Besar, yaitu Benteng Indrapatra (BIP), Benteng Inong Balee (BIB), dan Benteng Kuta Lubok (BKL). Analisa dilakukan menggunakan X-Ray Flourescence (XRF) dengan metode Fusion Beads. Hasil uji XRF menunjukkan bahwa ketiga benteng tersebut memiliki kandungan senyawa oksida yang sama, dengan persentase CaO sebanyak 46,16-51,37%, SiO2 sebanyak 2,56-6,68%, MgO sebanyak 1,01-2,16%, Al2O3sebanyak 0,73-1,18%, dan Fe2O3 sebanyak 0,53-0,70%. Senyawa-senyawa tersebut merupakan komposisi penyusun dari batu kapur jenis Kalsit. Hasil tersebut dibandingkan dengan material perekat yang digunakan saat ini (Semen) didapatkan memiliki komposisi yang berbeda. Semen mengandung komposisi oksida SiO2 dan SO3yang lebih besar daripada material perekat pada benteng purba yaitu sebesar 18% dan 3% untuk sampel sebanyak 1 gr. Preliminary study about adhesive material content in ancient fortress at Aceh Besar has been done. The fortress are Indrapatra, Inong Balee and Kuta Lubok. The sample is analyzed using X-Ray Flourescence (XRF) with Fusion Beads method. The result of XRF shows that all of the fortress have the same oxide compound which is CaO, with percentage of (46,16-51,37)%, SiO2 around (2,56-6,68)%, MgO around (1,01-2,16)%, Al2O3 around (0,73-1,18)%, and Fe2O3 around (0,53-0,70)%. The compounds are constituent of limestone of calcite. The results have been compared with the modern adhesive material (cement). It was found that cement has a different oxide composition with the adhesive material used in ancient fortress. Cement contains SiO2 and SO3 more than ancient adhesive material, the values are 18% and 3%, respectively, in one gram sample.
Synthesis and Microstructure Properties of (Bi,Pb)2Sr2Ca1Cu2Oy Ceramic Superconductor nurmalita .; Zuraini .; Evi Yufita; Fauzi .
Journal of Aceh Physics Society Volume 4 Number 1, March 2015
Publisher : PSI-Aceh

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Abstract

Properties of (Bi, Pb)2Sr2Ca1Cu2Oy ceramic superconductors were prepared by the melt textured growth methods in order to investigate the effects of the slow cooling time on the microstructur.  Phase analyses of the samples by X-ray diffraction (XRD) has been carried out to assess the effects of the slow cooling time. From XRD analyses, the addition to the sample of  the slow cooling time degrades formation of the high-Tc Bi-2212 phase. The possible reasons for the observed degradation in the microstructure properties due to the slow cooling time addition were discussed.
Identification Content of the Red Dragon Fruit Extract Skin Using Fourier Transform Infrared (FTIR) and Phytochemistry Muhammad Ilham Noor; Evi Yufita; Zulfalina .
Journal of Aceh Physics Society Volume 5 Number 1, March 2016
Publisher : PSI-Aceh

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Abstract

Corrosion is a decline in the quality of the metal due to electrochemical reaction between the metal by a corrosive medium. One effort to reduce the rate of corrosion is by adding inhibitors. Organic inhibitors that can be used include antioxidants and vitamin C. To determine both the content of the test method is used Fourier Transform Infrared (FTIR) and phytochemicals. FTIR is a method to measure used to determine the group and the type of bonding of a compound based on the value of the wave number of a plant. Phytochemical screening is a test of the qualitative secondary metabolites biologically active compounds found in plants. In this study used a sample of red dragon fruit. The results of the analysis provide information regarding the types of biologically active compounds and levels of the active compound contained in the red dragon fruit.
Pengaruh Ekstrak Kulit Buah Naga Merah dan Daun Trembesi sebagai Penghambat Korosi pada Baja A36 dalam Larutan HCl 3% Evi Yufita; Zulfalina -; Muhammad Ilham Nur; Fatriah Fatriah; Zulkarnain Jalil
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.54625

Abstract

Tumbuhan merupakan salah satu sumber daya alam yang dapat dimanfaatkan sebagai zat inhibitor organik. Inhibitor organik digunakan untuk mengatasi laju korosi terutama pada material yang mengandung logam. Penelitian ini bertujuan untuk mempelajari peluang beberapa ekstrak dari tumbuhan sehingga dapat dimanfaatkan sebagai inhibitor korosi berdasarkan nilai laju korosi dan efesiensi inhibisi. Tumbuhan yang digunakankan adalah buah naga merah (Hylocereus polyrhizus) dan daun trembesi (Samanea saman (Jacq.). Sampel ujinya berupa plat baja hitam A36 berdimensi 3 cm x 1,5 cm x 1,14 mm, dan medium korosif asam klorida (HCl) 3%. Variasi kosentrasi ekstrak inhibitor untuk masing-masing bahan yang ditambahkan ke dalam medium korosif HCl 3% sebesar 2, 4, 6, 8 dan 10 mL. Perhitungan laju korosi menggunakan metode kehilangan berat (weightloss). Dari hasil penelitian, nilai laju korosi terendah untuk inhibitor ekstrak kulit buah naga merah terdapat pada penambahan inhibitor 10 mL sebesar 0,0463 cm/yr dengan efisiensinya 91,89 %. Sedangkan nilai laju korosi terendah untuk inhibitor ektrak daun trembesi terjadi pada penambahan inhibitor 10ml sebesar 0,0066 cm/year dengan efisiensi 98,9 %. Dari hasil penelitian tersebut dapat disimpulkan bahwa kulit buah naga merah dan daun trembesi mampu menurunkan laju korosi yang terjadi pada baja, sehingga memiliki peluang alternatif untuk dijadikan sebagai inhibitor organik.
Improvements to conventional methods for determining lung cancer areas from CT scan images using ImageJ - software Edwar Iswardy; Munzir Munzir; Evi Yufita
Journal of Physics: Theories and Applications Vol 6, No 2 (2022): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v6i2.59349

Abstract

Early detection of lung cancer will definitely help the patients in treating the illness precisely and as early as possible.  One of the methods used to detect lung cancer is through CT scan examination. The images from CT scan will show the cancer area of lung describing the severity of lungs affected by cancer. However, the conventional method is often not accurate. Therefore, this research  aims to determine the area of cancer by segmenting the lung organs affected by cancer using Image-J software. The edge detection method was employed to segment an image. The results show that by using the proposed method, the largest cancer area is obtained in the seventh slice with the area of 15.39 cm2 and the smallest cancer area is obtained  in  the  first  slice  with  the  area  of 1.52  cm2. Whereas by using the convetional method, the  largest  cancer  area  is obtained in the fourth slice with the area of 20.57 cm2  and the smallest cancer area is  obtained  in  the  teenth  slice  with  the  area  of 3.52  cm2. The area of lung cancer in each CT Scan slice determined using ImageJ software is more accurate than the conventional method. For that reason, the  proposed  technique  is potential to improve the accuracy of a medical image analysis.
QUALITY CONTROL X RAYS MAMMOGRAPHY IN THE EFFORT MITIGATION INCREASING NUMBER OF CANCER PATIENTS Rini Safitri; Evi Yufita
Jurnal Natural Volume 17, Number 1, March 2017
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (195.316 KB) | DOI: 10.24815/jn.v17i1.6970

Abstract

Abstract. Early detection of breast cancer is the first step in prevention that can be done by women, therefore when one is diagnosed with breast cancer, the appropriate treatment can be performed quickly and accurately. Early diagnosis of breast cancer can be a way of mitigation in preventing breast cancer through the use of mammography. Bureau of Radiology as said by The Joint Commission on Accreditation of Hospitals (JHCA) stated that one of the responsibilities of the radiology unit is to control the quality of service which aims to minimize the radiographic image repetition factor; as well as maximizes the quality of radiographic image. Quality control tests are an effort that is needed on the mammography X-ray diagnostics tools. This is done to maintain the quality of expected output. The parameters that are included within the radiation output are the magnitude of current and the voltage of tube that are produced; therefore they remained constant and correspond to the recommended standard. Bureau of Radiological Health, as said by JHCA mentioned that to control the quality of image which will minimize the radiographic image repetition and maximizes the quality of radiographic image. Therefore the radiation output will not be dangerous later. The early stage of the quality control test on the machine was conducted by setting all the filtrations which were placed to capture the x-ray on the x-ray plane tube with minimum value. Then, ionization chamber is placed on the test subject points; right after that the distance between it to the radiation source is noted. The x-ray film is place on a film on the compression table of the patient and the distance between film and the focus point is noted. This is then exposed using a target filter Mo/Mo by setting the current as well as variation the voltage and time. The standard voltage measurements are 20-33kVp. This data is from the observations of time exposure; the output value is then noted. The above procedure is conducted from the minimum voltage to the maximum voltage. The output ray is measured for each voltage. The same procedure is conducted to the target filter Mo/RH. The results obtained are that the greater the input voltage and current will subsequently produce greater doses, therefore the exposure has exceeded the standard limit 0.1 mHy with longer exposure time. The HVL density thickness on the mammography X-ray machine determined the quality of the beam and the doses of x-ray exposure on the mammography machine. The output stability of x-ray beam exposure in the mammography machine mode Mo/Mo still fulfill the standard which is the value of 69% Keywords: Quality Control, Sinar-X, mammography, Mp/Mo, Mo/RH
Pengukuran Viskositas beberapa Produk Minyak Goreng Kelapa Sawit setelah Pemanasan Elin Yusibani; Nursabila Al Hazmi; Evi Yufita
Jurnal Teknologi dan Industri Pertanian Indonesia Vol 9, No 1 (2017): Vol.(9) No.1, April 2017
Publisher : Agricultural Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (814.753 KB) | DOI: 10.17969/jtipi.v9i1.6108

Abstract

Measurement of palm oil viscosity after heat treatment has been done. The sample is palm oil packaging and bulk ones Falling body method is used as an instrument to determine the coefficient of viscosity which had previously been calibrated using water and REFPROP. The measurement results showed that the coefficient of viscosity of palm cooking oil that has been used 10 times for 30 minuted will rise by 76% for oil packs A and about 45% for a sample of bulk, respectively. For palm oil used once but its has been using for one hour, the viscosity will be comparable to 6 times the use of the cooking oil used for 30 minutes. Thus based on the masurement of viscosity value, the palm oil will have a viscosity values are relatively small when used often, but in a short time than is used only once, but in a relatively longer.
The Effect of Temperature and Roasting Time on The Physical Properties of Arabica and Robusta Gayo Coffee Bean Elin Yusibani; Ikramullah ikramullah; Evi Yufita; Zulkarnain Jalil; Endi Suhendi
Journal of Applied Agricultural Science and Technology Vol. 7 No. 2 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i2.75

Abstract

The effect of variations in temperature and roasting time on the physical properties of coffee beans originating from the Gayo highlands with Arabica and Robusta types have been studied in this paper. Physical properties measured include weight loss, true density, porosity, and water content. The measurement procedure follows Standard Nasional Indonesia (SNI) 01-2907-2008. Three roasting levels were used in this study, i.e., Light Roast (159 -164 °C), Medium Roast (211 - 215 °C), and Dark Roast (above 232 °C) by an oven. The result showed that the weight loss for Arabica and Robusta coffee beans is from 11 - 19% and 14 - 29%, respectively. The true density for Arabica and Robusta coffee beans ranged from 0.905 - 1.085 g/cm3 and 0.950 - 1.156 g/cm3, respectively. The difference in porosity changes before and after roasting was 23 - 73% for Arabica and 33 - 68% for Robusta coffee beans. Meanwhile, the water content of Arabica and Robusta coffee beans after roasting is 0.7 - 5% and 0.6 - 6%, respectively. The value of the weight loss, true density, and water content of Arabica is lower than that of the Robusta coffee bean, while the porosity value of Arabica is higher than that of the Robusta coffee bean.
Co-Authors Aztarina Ermy Vijaya Beti Nanda Sari Cut Dewi Afriani Desy Fitriana Edwar Iswardy Elin Yusibani Endi Suhendi Faisal Abdullah Fasbir, Fasbir Fatriah Fatriah Fauzi . Fitriani Fitriani GUNAWATI, GUNAWATI Ikramullah ikramullah Lloyd Woodfield, Peter Muhammad Ilham Noor Muhammad Ilham Nur Muhammad Isa Muhammad Shadiq Maula, Teuku Munzir Munzir Mursal, M Nurmalita . Nurmalita Nurmalita Nurmalita Nurmalita Nurrizka Nadia Nursabila Al Hazmi Nurul Fitri Nurul Fitri Rajibussalim Rajibussalim Rini Safitri Rini Safitri Saudiah Mawaddah Teuku Maimun Zulfalina . ZULFALINA ZULFALINA Zulkarnain Jalil Zulkarnain Jalil Zuraini .