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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.838 KB)

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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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

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

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

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

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

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.

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 | DOI: 10.24815/jn.v17i1.6970

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

ANALISA PENGARUH FUNGSI JARAK PESAWAT SINAR-X TERHADAP SEBARAN DOSISI RADIASI DI RUANG LABORATORIUM KLINIK Yufita, Evi; Fitriani, Fitriani; Fasbir, Fasbir; Safitri, Rini
Relativitas: Jurnal Riset Inovasi Pembelajaran Fisika Vol. 7 No. 2 (2024): Jurnal Riset Inovasi Pembelajaran Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, UNIVERSITAS MA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/relativitas.v7i2.18234

Sebaran dosis paparan radiasi di ruang radiologi sangat penting diukur, sehingga dapat dipastikan keamanan para pekerja radiasi. Penelitian ini bertujuan untuk mengetahui pengaruh jarak sumber radiasi terhadap sebaran dosis radiasi dan efektivitas perisai radiasi di laboratorium klinik Fakultas Hewan Universitas Syiah Kuala. Metode yang digunakan adalah pengukuran radiasi sekunder pada jarak 1m, 1,5m dan 2m dari sumber radiasi dengan alat multimeter X-Ray. Efektivitas perisai radiasi diukur pada bagian dalam dan luar perisai (kaca operator, pintu dan dinding). Hasil penelitian pengukuran dosis radiasi menunjukkan bahwa daerah aman bagi pekerja radiasi dari sumber radiasi sinar-X pada I = 100 mA dan I =200 mA adalah untuk V = 46 kV diperoleh pada jarak lebih 1 m, pada V = 55 kV pada jarak lebih 1,5 m dan pada V = 81 kV pada jarak 2 meter. Efektivitas perisai radiasi (kaca operator, pintu dan dinding) di laboratorium klinik FKH sangat baik (100 %).

Physical and Chemical Properties of Gayo Coffee Brewed by Boiling Method with Variation of Particle Coffee Ground Yufita, Evi; Muhammad Shadiq Maula, Teuku; Gunawati, Gunawati; Lloyd Woodfield, Peter; Yusibani, Elin
Jurnal Ilmu Fisika Vol 17 No 1 (2025): March 2025
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.17.1.9-18.2025

The effect of coffee ground particle size by the boiling method on the values of physical and chemical parameters is studied. The coffee used is Arabica (Luwak, wine, honey) and Robusta from the Gayo Highlands, Aceh Province, Indonesia. Extraction of the coffee brew uses the boiling method with different particle sizes of coffee grounds (fine and coarse). The caffeine content in the coffee brew is identified using the FieldSpec4 Hi-Res Spectrometer. The particle size of coffee grounds affected the coffee brew's physical properties and caffeine content. The physical properties in the form of the pH value of Arabica coffee brew are lower than Robusta in a range from 4.87 to 4.97 and 5.13 to 5.28, respectively. The pH of coffee brew with fine particle sizes is slightly higher than for coarse ones for Robusta coffee brew. The density of the brew is in the vicinity range of 0.99 g/cm3. Arabica and Robusta brews differ in viscosity and caffeine release, influenced by coffee particle size. Coarse particles yield more caffeine in Arabica, while fine particles release more in Robusta, demonstrating the impact of grind size on caffeine extraction in coffee.

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