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All Journal Indonesian Journal of Chemistry Jurnal Pengabdian Bersama Masyarakat Indonesia
Fatikasari, Tanty
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Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Public Health

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Green Synthesis of Silver Nanoparticles Using Citrus sinensis Peels Assisted by Microwave Irradiation as a Contrast Agents for Computed Tomography Imaging Fatikasari, Tanty; Nurhasanah, Iis; Khumaeni, Ali
Indonesian Journal of Chemistry Vol 24, No 5 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95690

Abstract

Contrast agents are extensively used to enhance the quality of images in computed tomography (CT) scans for brain exams, vascular imaging, and full-body imaging. Recent data indicate that iodine-based contrast agents have brief durations of blood circulation and may lead to harmful toxicity effects. This study aims to produce silver nanoparticles using environmentally friendly synthesis techniques facilitated by microwaves. The characteristics of nanoparticles have been studied using UV-vis, FTIR, XRD, and TEM techniques. The TEM analysis reveals that the silver nanoparticle has an average diameter of 9 nm and exhibits a spherical shape. The contrast-to-noise ratio (CNR) values of silver nanoparticles at 100, 150, and 200 mg/L concentrations are 35.79, 48.16, and 74.66, respectively. In comparison, iodine exhibits CNR values of 28.57, 34.69, and 48.56 at the same concentrations. The CNR values for tube currents of 140, 160, and 180 mA are 37.83, 44.98, and 48.26, respectively. In contrast, the CNR values in silver nanoparticles are 63.64, 75.32, and 81.67. The results obtained from the different concentrations and tube currents clearly demonstrate that silver nanoparticles have a higher CNR than iopamidol. Hence, silver nanoparticles have significant potential as contrast agents.
Pendampingan Penerapan Prinsip Fisika Bangunan Skala Mikro untuk Menciptakan Lingkungan Rumah Sehat di Kelurahan Sambiroto Fatikasari, Tanty; Al Adawiyah, Novia
Jurnal Pengabdian Bersama Masyarakat Indonesia Vol. 4 No. 3 (2026): Juli : : Jurnal Pengabdian Bersama Masyarakat Indonesia
Publisher : CV. Aksara Global Akademia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59031/jpbmi.v4i3.936

Abstract

Dense urban settlements often leave limited space between buildings, reducing natural ventilation and daylight inside houses. These conditions may increase indoor humidity, reduce occupants' comfort, and accelerate the deterioration of several building components. This community service program aimed to improve public understanding of building physics principles through micro-scale mentoring focused on natural ventilation, daylighting, and moisture control. The program was conducted in Sambiroto, Semarang, involving five housewives and one local construction worker. Activities consisted of participatory discussions supported by visual learning materials followed by on-site consultation during a house renovation project. Participants' understanding was evaluated using a five-point Descriptive Achievement Scale. The results showed that all participants achieved a very good category in thermal comfort and moisture control. The mentoring activities also led to the implementation of practical recommendations, including the use of a vertical void above the staircase to promote the stack effect and the installation of an aluminium foil layer beneath the roof covering to reduce heat transfer into the building. These findings suggest that direct field-based mentoring can effectively support communities in understanding and applying building physics principles to create healthier, more comfortable, and energy-efficient housing
Co-Authors Al Adawiyah, Novia Ali Khumaeni Iis Nurhasanah