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All Journal Jurnal Ilmiah Pertanian Dharma Bakti
Fajarwati, Febi Indah
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Agriculture, Biological Sciences & Forestry Humanities Education Social Sciences Other

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Penguatan dan Pemahaman Kimia Melalui Learn Management System (LMS): Teachmit pada MGMP Kimia Kabupaten Bantul Febriana, Beta Wulan; Hidayat, Habibi; Merdekawati, Krisna; Arlianty, Widinda Normalia; Wiyantoko, Bayu; Fajarwati, Febi Indah; Yanti, Ika
DHARMA BAKTI Dharma Bakti-Vol 7 No 1-April 2024
Publisher : LPPM IST AKPRIND Yogyakarta

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This activity is a training activity on strengthening understanding of chemistry through the Learning Management System (LMS). The basis for taking this activity is based on a needs analysis that has been carried out for the MGMP Chemistry teacher in Bantul Regency. A needs analysis was conducted using non-test instruments in the form of open questionnaires and interviews. Based on the needs analysis results, it shows that most teachers experience problems implementing online learning activities so that learning materials cannot be delivered properly. The method used in this activity is formal socialization—offline. The material presented is related to chemistry and applications and the introduction of LMS. LMS: Teachmint is considered to be able to facilitate students and teachers in teaching and learning activities. Teachers can efficiently conduct video conferences, share material in the form of files/videos, provide deadlines for collecting assignments, and assess and even interact with students using only a single platform. This training received a positive response from chemistry teachers; most teachers agreed to use the platform in chemistry learning
Microwave-assisted extraction and computational modelling of curcumin from turmeric (Curcuma longa) for sunscreen applications Salmahaminati, Salmahaminati; Muchtar, Khopipah; Fajarwati, Febi Indah; Herawati, Mutiara; Kesumawati, Ayundyah
Jurnal Ilmiah Pertanian Vol. 22 No. 2 (2025): Jurnal Ilmiah Pertanian
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/jip.v22i2.22693

Abstract

Excessive exposure to ultraviolet (UV) radiation from sunlight can cause skin damage, including premature aging, sunburn, and increased risk of skin cancer. While synthetic sunscreen agents are widely used, concerns over their long-term safety have driven interest in natural alternatives. In this study, curcumin was extracted from turmeric rhizomes (Curcuma longa) using microwave-assisted extraction (MAE) as a potential natural sunscreen. The highest yield was obtained using ethanol as solvent (5.5%), 100 watts of microwave power (5.7%), and solvent temperature of 50 °C (7.8%). Curcumin presence was confirmed by thin layer chromatography (TLC), with Rf values from 0.63 (methanol) to 0.82 (ethanol). Fourier transform infrared (FTIR) spectroscopy showed functional groups including O–H, C–H, C=C, C=O, and C–O, along with trans-C–H benzoate vibrations. ¹H-NMR spectra supported its presence, with chemical shifts at 3.80–3.92, 6.54–7.18, and 7.31–7.49 ppm. UV-Vis analysis revealed strong absorption in the UV-A region (320–420 nm), and DFT-based computational modelling showed peaks at 276 and 405 nm. These results highlight curcumin’s potential as a photoprotective agent, supporting safer, plant-based sunscreen formulations and offering a sustainable alternative for the cosmetic industry.
Co-Authors Airun, Nurul Hidayati Beta Wulan Febriana Dwiputri, Adelia Yuni Habibi Hidayat, Habibi Harry Supriadi Ika Yanti, Ika Kesumawati, Ayundyah Krisna Merdekawati, Krisna Mai Anugrahwati Matahelumual, Bethy C Mayang Sari, Sukma Radik Muchtar, Khopipah Mulwandari, Meike Mutiara Herawati, Mutiara Nasriyanti, Desi Safitri, Rika Awalin Salmahaminati Salmahaminati, Salmahaminati Widinda Normalia Arlianty, Widinda Normalia Wiyantoko, Bayu Zukhrufi, Zukhrufi