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Rista Mutia Anggraini
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KARAKTERISASI NATURAL HIDROKSIAPATIT DARI TULANG IKAN LELE (Calarias batracus) Rista Mutia Anggraini; Yusril Yusuf
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 2 (2023): JOP (Journal Online of Physics) Vol 8 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i2.24226

Abstract

Biomaterial hidroksiapatit (HAp) telah berhasil didapatkan dari bahan alami yaitu tulang ikan lele (Calarias batracus). Proses ini menggunakan metode heat treatment dengan suhu yang digunakan yakni 1000oC. Karakterisasi sampel HAp dilakukan menggunakan X-Ray Diffractometer (XRD) dan Fourier Transform Infrared (FTIR). Data XRD menunjukkan bahwa karakteristik HAp ditemukan pada HAp dari tulang ikan lele berdasarkan data JCPDS 09-0432. Tidak ada fase baru yang terbentuk pada HAp setelah dilakukan pemanasan. Selain itu tidak terjadi perubahan secara signifikan pada nilai konstanta kisi HAp sebelum dan setelah dipanaskan. HAp setelah pemanasan memiliki kristalinitas lebih tinggi daripada HAp sebelum pemanasan. Hal ini dibuktikan berdasarkan data FWHM dan analisis perhitungan persentase kristalinitas dari data XRD. Sampel tanpa pemanasan memiliki kristalinitas 62% dan setelah pemanasan 97%. Diketahui bahwa sampel tanpa pemanasan adalah HAp dengan fase amorf. Data FTIR menunjukkan bahwa gugus fungsi yang muncul pada kedua sampel juga merupakan karakteristik HAp. Gugus fungsi yang muncul diantaranya adalah OH-, PO43- dan CO32-.
ANALISIS DOSIS PAPARAN RADIASI DARI PESAWAT PANORAMIK DI INSTALASI RADIOLOGI RUMAH SAKIT UMUM DAERAH RADEN MATTAHER JAMBI Chintiya Romarti; Jesi Pebralia; Rista Mutia Anggraini
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.27310

Abstract

This research aims to analyze the influence of distance and direction on radiation exposure values, assess the doses received by radiation workers and the general public, and evaluate the effectiveness of radiation protection from panoramic aircraft. The research method used is an experimental research method, where the researcher directly measures the variables of the study and conducts data analysis. The study was conducted by measuring radiation doses in various directions at distances ranging from 0.5 meters to 2.5 meters forward and to the right, and 0.5 meters to 1.5 meters to the left. Dose data reception was taken at operator room, service area, corridor, and waiting room points, and radiation protection effectiveness measurements were taken at corridor entrance, waiting room, and operator room points using a survey meter. The research results indicate that the radiation exposure dose is inversely proportional to the measured distance. The dose received by radiographers in the operator room is 0.107 μSv/hour, in the employee corridor, it is 0.0856 μSv/hour, and in the public waiting room, it is 0.0856 μSv/hour. The radiation protection effectiveness value in the operator room is 94.40%, at the patient entrance from the panoramic aircraft waiting room, it is 92.12%, and at the radiographer entrance from the employee corridor, it is 94.62%. According to the Tenth Value Thickness (TVT) concept, this is considered safe because the existing protection capabilities can effectively absorb radiation.
CHARACTERIZATION OF HYDROXYAPATITE FROM CHANNA STRIATA AND SCOMBEROMORUS COMMERSON FISH BONE BY HEAT TREATMENT Rista Mutia Anggraini; Tika Restianingsih; Frastica Deswardani; Yoza Fendriani; Roedearni Ananda Putri Purba
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.28727

Abstract

Hydroxyapatite (HAp) biomaterials have been successfully obtained from Channa striata and Scomberomorus commerso fish bone. Heat treatment was chosen as the method to get it. Heat treatment was done at 400oC, 600oC, and 800oC. The X-ray diffractometer (XRD) was used to determine the crystalline phase and crystallography properties. Based on XRD data and JCPDS 09-0432, all samples showed the phase of HAp. However, the β-TCP phase has been found in samples from Scomberomorus commerso, which calcined at 600oC and 800oC. The crystallite size of HAp from Channa striata fish bone increased as followed by higher temperature, and Scomberomorus commerso has the same crystallite size on samples that calcined at 600oC and 800oC. The microstrain of both samples has the same trend: the higher the temperature, the lower the microstrain. The temperature also affected the crystallinity sample; the higher the calcined temperature, the improved crystallinity. Fourier Transform Infrared (FTIR) data determined the functional groups of samples. The functional groups that appeared were OH-, PO43-, and CO32-. The mass of samples before calcined differs from after calcined, where the mass after calcined is smaller than before. The higher the temperature we used, the more decreased yield percentage we got.
Co-Authors Chintiya Romarti Frastica Deswardani Jesi Pebralia Roedearni Ananda Putri Purba Tika Restianingsih Yoza Fendriani Yusril Yusuf