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All Journal Jurnal Ilmu Pertanian Indonesia The Journal of Pure and Applied Chemistry Research JURNAL FARMASI DAN ILMU KEFARMASIAN INDONESIA Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Jurnal Pendidikan Kimia (JPKim) QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Jurnal Kartika Kimia Journal of Science Innovare EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Jurnal AbdiMas Nusa Mandiri Charity : Jurnal Pengabdian Masyarakat Rudence: Rural Development for Economic Resilience Helium: Journal of Science and Applied Chemistry Jurnal Pengabdian Masyarakat Inovatif Jurnal Pengabdian Masyarakat Inovatif Senadika
Diana Widiastuti
Universitas Pakuan
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Antioxidant Potential and Active Compound Identification of Hylocereus costaricensis and Hylocereus undatus Peel Extracts using LC-MS/MS Mulyati, Ade Heri; Nurmayani, Reni; Widiastuti, Diana; Warnasih, Siti; Sinaga, Siska Elisahbet
Chimica et Natura Acta Vol 13, No 2 (2025)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v13.n2.61186

Abstract

The object of this research was to determine the antioxidant potential and identify active compounds in the peel extracts of red dragon fruit (Hylocereus costaricensis) and white dragon fruit (Hylocereus undatus). Phytochemical tests were conducted to identify flavonoids, alkaloids, tannins, coumarins, and saponins. The antioxidant activity was assessed using the DPPH assay, while vitamin C content was quantified using UV-Vis spectrophotometry, and bioactive antioxidant compounds were identified through LC-MS/MS spectrophotometry. The results demonstrated that phytochemical screening revealed the presence of flavonoids and alkaloids in both extracts. Antioxidant activity assays indicated that the red dragon fruit peel extract exhibited an IC50 of 32.7 ppm (very active), while the white dragon fruit peel extract had an IC50 of 50.2 ppm (active), with the vitamin C control showing an IC50 of 11.90 ppm. The red dragon fruit peel extract had the highest vitamin C content (1.45%) compared to the white dragon fruit peel (1.04%). LC-MS/MS analysis identified several organic compounds, including the flavonoid isoliquiritigenin and alkaloid compounds such as aporphine, melosmine, 3-carbamoyl-1-(2-deoxy-beta-D-erythro-pentofuranosyl)-4,5-dimethylpyridinium, and alkaloid group (6-Amino-5-{[2(diethylamino) ethyl]amino}-1-propyl -2,4(1H,3H)-pyrimidinedione). These findings suggest that both red and white dragon fruit peel extracts possess significant antioxidant potential, with red dragon fruit peel demonstrating superior activity. This study can be used for further research on food technology in producing food products that are rich in nutrients.
Analisis Kesulitan Belajar Matematika Siswa Kelas VII SMP Negeri 2 Magelang Pada Materi Aljabar Sari, Kurnia Arfanita; Widiastuti, Diana; Puspitasari, Laras Meisya
PROSIDING SENADIKA : Seminar Nasional Akademik Vol 1 No 1 (2024): PROSIDING SEMINAR NASIONAL AKADEMIK (SENADIKA) 2024
Publisher : PROSIDING SENADIKA : Seminar Nasional Akademik

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Abstract

Penelitian ini bertujuan untuk mengetahui kesulitan-kesulitan yang dialami siswa dalam mengerjakan soal pada materi aljabar dan faktor-faktor penyebab siswa mengalami kesulitan dalam mengerjakan soal pada materi aljabar. Jenis penelitian yang dilakukan adalah penelitian deskriptif dengan pendekatan kualitatif. Subjek penelitian yang digunakan adalah siswa SMP Negeri 2 Magelang kelas VII F sebanyak 32 siswa. Teknik pengumpulan data yaitu tes uraian sebanyak 3 soal, dan dokumentasi tugas siswa. Hasil dari penelitian ini menemukan bahwa kesulitan belajar siswa dapat dilihat dari jawaban siswa dalam mengerjakan soal aljabar yaitu kesulitan siswa dalam memahami konsep, kesulitan siswa dalam menerapkan dasar berhitung, kesulitan siswa dalam menerapkan operasi bilangan bulat, kesulitan siswa dalam memahami soal kontekstual. Faktor-faktor penyebab siswa mengalami kesulitan dalam mengerjakan soal aljabar adalah faktor fisiologi, faktor sosial, faktor emosional, faktor intelektual, faktor pedagogis.
Co-Authors Ade Heri Mulyati Ade Heri Mulyati Ade Heri Mulyati Ade Heri Mulyati, Ade Heri Adhimah, Novy Nur Agus Taufiq Agustine, Dine Akhwan Triadi Ani Iryani Aqilah, Siti Azizah, Briantine Siti Nur Benedicta, Glisten Madeleine Dhiandani, Sri Boedi Dwi Febriantini Eka Herlina Eka Herlina Eka Herlina Eka Herlina Esya Juniar Fajar Anggraeni Fajar Dwi Fauzi Hidayat Farah Dinna Farida Nuraeni Farida Nuraeni Fatwa Rachmawati Annissa Haritsa, Angel Aulia Herman, Herman LAKSMI AMBARSARI Lathifah, Suci Siti Leny Heliawati Linda Jati Kusumawardani Maharani Farah Dhifa Dg Masikki Matius Paundanan Muhammad Fathurrahman Muhammad Fathurrahman Muhammad Rivai Muthia Septiani Novy Nur Adhimah Nunung Kurniasih, Nunung Nurmayani, Reni Pham Van Hung Purwantiningsih Sugita Puspitasari, Laras Meisya Putry Sri Ratih Ratih, Putry Sri Sadjarwa, Boedi Sari, Kurnia Arfanita Septiani, Muthia Sherin Nurhafidza Ahmad Simalango, Siska Juliani Sinaga, Siska Elisahbet Siska Elisahbet Sinaga Siska Elisahbet Sinaga Siti Warmasih Siti Warnasih Sofian, Yayan Supratman, Lilis Sutanto . Sutanto _ Tri Panji Triastinurmiatiningsih, Triastinurmiatiningsih Usep Suhendar Uswatun Hasanah Uswatun Hasanah Vina Amalia, Vina Yulian Syahputri Zahra Sahara Maharani Zuniar Subastian