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All Journal JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Media Ilmiah Kesehatan Indonesia
Jumardin Jumardin
Universitas Islam Negeri Alauddin Makassar
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The Synthesis and Characterization of Structural Properties of Hydroxyapatite from Cuttlefish Shell Using X-Ray Diffraction Method Sitti; Jumardin Jumardin; Nurul Fuadi
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 12 No 2 (2024)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v12i2.50635

Abstract

The preparation of solid hydroxyapatite (HAp) with variations in calcination temperature has been carried out. This study aims to determine the crystal size, dislocation density and crystallinity levels of HAp using XRD. HAp is made by mixing cuttlefish shell powder with a solution of KH2PO4, NaOH and Aquades then drying it for 24 hours. Extraction of CaCO3 from cuttlefish shells using the calcination method at various temperature variations, namely 600 0C, 800 0C and 1,000 0C. XRD test to determine the crystal size value, crystal defects and crystallinity of HAp material. XRD data shows that HAp solids form crystals with smaller sizes (50.97 nm, 48.64 nm and 36.52 nm) when the calcination temperature increases, dislocation density increase (0.38 nm-2.10-4, 0.42 nm-2.10-4 and 0.74 nm-2.10-4) as the calcination temperature increases and the crystallinity value decreases (46.31%, 39.06% and 37.93%) based on changes in calcination temperature.
Analysis of Sun Protection Factor (SPF) values of Shallot Leaf Extract using UV-Vis Spectroscopy Method Hajra Hajra; Jumardin Jumardin; Ihsan Ihsan
Media Ilmiah Kesehatan Indonesia Vol. 4 No. 1 (2026): JANUARY
Publisher : Pakis Journal Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58184/miki.v4i1.823

Abstract

A study has been conducted on measuring the sun protection potential of red onion leaf extract with the percentage of pigmentation transmission (%Tp), erythema transmission (%Te), and Sun Protection Factor (SPF) using the UV-Vis Spectrophotometry method. The purpose of this study was to classify the sun protection potential categories of shallot leaf extract. The sunscreen ability test was determined by the calculation method of erythema transmission, pigmentation transmission, and SPF in the wavelength range of 290-320 nm with a distance of 5 nm. From the test, the concentrations of 400 ppm, 600 ppm, 800 ppm, and 1000 ppm were obtained which were included in the Extra Protection category for pigmentation based on the values ​​(%Tp) which were 63.70%, 60.15%, 46.15%, and 47.45%, respectively, all of which were in the Extra Protection category (42 – 86%). The erythema values ​​for each were 63.57%, 59.14%, 45.96%, and 47.31%, respectively. The SPF values ​​were categorized as Minimal Protection with values ​​at concentrations of 400 ppm (1.903), 600 ppm (2.219), 800 ppm (3.284), and 1000 ppm (3.161). The UV protection effectiveness of shallot leaf extract was highly sensitive to pH changes and reached optimum conditions at a pH close to neutral, around 7.07.
Pengaruh Variasi FFD pada Anoda Heel Effect Terhadap Kualitas Citra Radiografi Melalui Parameter Pixel Value Sitti Normawati; Syahrir Syahrir; Nur Fitri Qalbina Syahdan; Jumardin Jumardin
Media Ilmiah Kesehatan Indonesia Vol. 4 No. 2 (2026): MAY
Publisher : Pakis Journal Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58184/miki.v4i2.978

Abstract

This study aimed to analyze the effect of variations in focus-to-film distance (FFD) on the anode heel effect and radiographic image quality, based on the Pixel Value (PV) parameter. A quantitative experimental approach was employed. The testing was conducted using a phantom articulatio genu with FFD variations of 90 cm, 100 cm, and 120 cm, and object positions varied between the cathode and anode sides. The results indicated that the anode heel effect was more effectively utilized at shorter FFD when the thick side of the object was positioned on the cathode side. The highest PV value was obtained under this condition, whereas a decrease of approximately 11% was observed when the thick side was positioned on the anode side. Furthermore, an FFD of 100 cm produced lower PV standard deviation (PVSD) values, resulting in more homogeneous images with minimal noise. These findings demonstrate that variations in FFD and object positioning influence the distribution of X-ray intensity and radiographic image quality. Appropriate selection of FFD and placement of the thick side of the object on the cathode side can produce more uniform radiographs in terms of sharpness, brightness, and density.
Co-Authors Hajra Hajra Ihsan Ihsan Nur Fitri Qalbina Syahdan Nurul Fuadi Sitti Syahrir Syahrir