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INDONESIA
Indonesian Physical Review
Published by Universitas Mataram
ISSN : 26151278     EISSN : 26147904     DOI : -
Core Subject : Science, Education,
Education Physics
Indonesian Physical Review is a peer review journal which is managed and published by Physics Departement, Faculty of Mathematics and Natural Sciences, Universitas Mataram. This journal is published periodically three times a year, in January, May and September. IPR is Open Accsess for all readers and includes research developments in physics both experimentally and analytically. Focus and scope include Theoritical Physics, Computation, Material sciences, Instrumentation, Biophysics, Geophysics, and Optics.
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Articles 25 Documents
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Search results for , issue "Vol. 8 No. 1 (2025)" : 25 Documents clear
SYNTHESIS OF BIOMATERIAL-GRADE WHITLOCKITE FROM CRAB SHELL WASTE: AN ECO-FRIENDLY APPROACH Khumaera, Rahmatia; Sirait, Maria Diva Yuniar; Rahim, Muhammad; Putri, Rezky Meyvia; Sumual, Theofilus Ariel; Musyarofah, Musyarofah
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.403

Abstract

Crab shells, rich in calcium carbonate (CaCO3), provide a sustainable source of calcium oxide (CaO) for synthesizing Whitlockite (WH, Ca9(MgFe)(PO4)6PO3H), a potential biomaterial for bone replacement. This study addresses prior research gaps by exploring synthesis temperature variations from 700℃ to 1000℃  and employing acid precipitation to yield high-purity WH. Characterization was performed using Fourier Transform Infrared (FT-IR), X-ray Diffraction (XRD), X-ray fluorescence (XRF), Scanning Electron Microscopy (SEM), and Brunauer Emmet-Teller (BET) analysis. Results indicate that the crab shell powder contains 99.0944%wt. The XRD results show that optimal crystallinity and purity of WH were achieved at a calcination temperature of 900℃.  The FTIR test results show that the functional groups of WH at calcination temperatures of 700℃, 800℃, 900℃, and 1000℃ for 5 hours are detected in specific wave ranges, namely PO₄³- (673-671 cm-¹), and OH- (3340-3198 cm-¹), which contribute to the bone formation process. SEM tests revealed that changes in calcination temperature affected the morphology of WH, with the optimal temperature producing a smaller size, minimal agglomeration, and a more uniform size distribution. BET analysis showed that 900℃ gave the highest adsorption capacity and good stability, indicating a more significant potential for interaction with body cells. These findings confirm the ability of WH to be a promising biomaterial for bone replacement applications.
OPTIMIZING THE CARBONIZATION TEMPERATURE OF WATER HYACINTH BIOCHAR BY PROXIMATE ANALYSIS USING RESPONSE SURFACE METHODOLOGY Maulina, Wenny; Habibah, Putri Sifa; Arkundato, Artoto; Syarifah, Ratna Dewi; Sulistiyo, Yudi Aris; Sukmawati, Nissa
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.405

Abstract

Water hyacinth is a locally available biomass with the potential to be converted into biochar, serving as a renewable energy source. In this report, response surface methodology (RSM) was employed to optimize the carbonization temperature during the preparation of water hyacinth biochar. Water hyacinth was carbonized in a furnace at varied temperatures (400 °C, 500 °C, 600 °C) for 90 minutes. Characterization of the biochar derived from water hyacinth by proximate analysis was determined, including moisture content, ash content, volatile matter, fixed carbon, and calorific value. The results of the biochar before optimization indicated that moisture content and volatile matter decreased with increasing carbonization temperature, while ash content, fixed carbon, and calorific value increased. After optimization, the proximate analysis of the biochar was determined, with the optimal carbonization temperature found to be 533.54 °C. At this temperature, the optimal moisture content was 6.50%, ash content was 25.53%, volatile matter was 24.80%, and fixed carbon was 43,16%. These findings demonstrate the feasibility of using RSM to optimize the preparation conditions of water hyacinth biochar.
MONTE CARLO ANALYSIS OF FETAL DOSE DISTRIBUTION IN PREGNANCY FOR DIFFERENT FETAL AGES, BEAM LOCATION, BEAM ENERGY, AND FIELD SIZES Nikmah, Khusniatun; Ramadhan, Muhammad Vitro; Sumaryada, Tony; Rhani, Muhammad Fahdillah; Husin, Abd. Djamil; Yani, Sitti
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.406

Abstract

Treatment with radiotherapy in pregnant women may occur due to some critical conditions. The dose given during the treatment process is not only received by the patient but can also be absorbed by the fetus which can affect its growth. Moreover, the radiation target is near the fetus such as the lung. This study aims to determine the dose distribution to the fetus with variations in fetal age (trimester 1, 2, and 3), beam energy, field size, and fetal distance to the target location (lung). The entire simulation utilized the Monte Carlo-based software EGSnrc-DOSXYZnrc which produced a 3-dimensional dose distribution on the virtual phantom. The simulated virtual phantom is a box with a size of 40×40×40 cm3 containing several materials, namely water, tissue, and lung. The size of the fetus is varied according to trimesters 1, 2, and 3. The beam is in the form of monoenergetic photons with energies of 3 MeV and 5 MeV emitted from above with a source to surface distance (SSD) of 48 cm. The field size was set at 5×5 cm2 and 8×8 cm2 on the phantom surface. The beam axis was located at a distance of 5 cm and 3 cm from the fetus. The results showed that the four variations performed affected the fetal dose, where the fetal dose increased considerably when the field size was enlarged and the beam axis was closer to the fetal position. The increase in fetal dose is also influenced by the increase in fetal age and beam energy. Meanwhile, the location of the beam below the lung causes an increased dose to the fetus due to the closer position of the beam to the fetus.
DEVELOPMENT OF A LITHIUM-ION BATTERY CHARGING SYSTEM UNDER CONSTANT CURRENT AND VOLTAGE CONDITIONS USING STM-32 BASED ON FUZZY LOGIC CONTROL Asy'ari, Muhammad Khamim; Panggabean, David Keyvin Sabam Halomoan; Musyafa, Ali; Ginting, Kevin Bestian
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.409

Abstract

Lithium-ion batteries are electrical energy storage devices often found in portable electronic equipment. Overcharging and discharging the battery will reduce its life and cause severe damage. Constant current and voltage control methods and control algorithms, such as fuzzy logic control, need to be added to avoid this. This research aims to develop a lithium-ion battery charging system using a constant current and voltage method based on fuzzy logic control. A constant current-constant voltage (cc-cv) charging system helps control the charging voltage and current by conditioning the initial charging to use a constant current so as not to overcharge. Constant current uses a buck converter circuit, while constant voltage uses a voltage regulator circuit. The charging system is equipped with a voltage sensor and a current sensor. System control uses fuzzy logic control methods with input variables as errors and delta errors while the output is a duty cycle. The overall system design was carried out at the Measurement, Reliability, Risk, and Safety Laboratory, ITS for 4 months. The test results show that charging the battery produces a voltage of 12.6 Volts and a current of 2.5 Amperes. The battery will be fully charged, and the charging system will stop when the flowing current decreases and the current is cut off at 100 mA.
THE EFFECT OF CALCINATION TEMPERATURE AND HOLDING TIME ON STRUCTURAL PROPERTIES OF CALCIA POWDERS DERIVED FROM EGGSHELL WASTE Prayitno, Budi; Musyarofah, Musyarofah; Tajalla, Gusti Umindya Nur; Nafisah, Azmia Rizka; Norhidayah, Siti; Kartika, Siska Ayu
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.450

Abstract

This study investigates the effects of calcination temperature and holding time on the structural properties of calcia (CaO) powders. The raw material used in this study is chicken eggshell waste, which was cleaned, dried, ground, and sieved for uniform particle size. The synthesis of calcia powder was performed by calcining the powder at 900°C and 1000 °C for 5, 10, and 15 hours. XRD, BET, and SEM analyses were employed to evaluate crystal structure, textural properties, and microstructure of the calcined powders. The Rietveld analysis reveals the identified crystalline phases were calcia up to 95.6 mol% and calcium hydroxide as secondary phase. Results indicate that higher calcination temperatures and extended holding times increase particle size and reduce BET surface area, significantly altering pore size distribution. Specifically, elevated temperatures promote sintering and grain growth, leading to smaller average pore radii and decreased total pore volume. The BET surface area ranges from 7.431 m2/g to 1.772 m2/g for samples calcined at 900 °C and from 3.202 m²/g to 0.711 m²/g for samples calcined at 1000 °C. Correspondingly, the average particle radius increases from 183.51 nm to 769.55 nm at 900 °C and from 425.83 nm to 1918.10 nm at 1000 °C as the holding time extends. BJH analysis reveals that longer holding times broaden pore size distribution due to the merging of smaller pores.

Page 3 of 3 | Total Record : 25

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