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All Journal JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Jurnal Fisika dan Terapannya
Nurul Fuadi
Universitas Islam Negeri Alauddin Makassar
Education Physics Other

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PENGARUH INTENSITAS KEBISINGAN TERHADAP TEKANAN DARAH SEBELUM DAN SETELAH BEKERJA DI PERCETAKAN CV. RINJANI PERKASA Citra Wardani; Sri Zelviani; Nurul Fuadi
JFT : Jurnal Fisika dan Terapannya Vol 8 No 1 (2021): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i1.20072

Abstract

This research was attempted to identify the effect of the seriousness of noise on CV Rinjani Perkasa's blood pressure. This study used a procedure to compare blood pressure before and after exposure to sound sources from the press. Fifteen respondents measured blood pressure between the ages of 20-40 years during working hours using a digital blood monitor. The average measured sound seriousness is 107.8 dB in the room where the sound source is made and 99.1 dB in the room directly adjacent to the sound source. Blood pressure measurements showed that blood pressure increased more in 15 respondents. For example, Respondent 4 who is located next to the noise source has a systolic blood pressure of 20.62% and a diastolic blood pressure of 15.96%, whereas Respondent 1 is located next to the noise source. There is a problem, the percentage increase. With blood pressure. Low blood pressure Systolic blood pressure of 7.48% and diastolic blood pressure of 6.08%.
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.
Co-Authors Citra Wardani Jumardin Jumardin Sitti Zelviani, Sri