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All Journal Community Development Journal: Jurnal Pengabdian Masyarakat Indonesian Journal of Pharmaceutical Education
Melinda, Reni
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Humanities Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Education Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Public Health

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Penetapan Kadar Vitamin C dan Aktivitas Antioksidan Hasil Perasan Buah Jambu Biji Kristal Melinda, Reni; Sartika Daulay, Anny; Ridwanto, Ridwanto; Amin Nasution, Muhammad
Indonesian Journal of Pharmaceutical Education Vol 4, No 3 (2024): September-Desember 2024
Publisher : Jurusan Farmasi Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37311/ijpe.v4i3.28891

Abstract

Vitamin C or ascorbic acid, is a type of water-soluble vitamin derived from hexose. Ascorbic acid contains a chromophore group, which is sensitive to light or forms of electromagnetic radiation. In addition, ascorbic acid functions as an antioxidant and protector against free radicals. Vitamin C is an antioxidant vitamin that can ward off various extracellular free radicals. This antioxidant property comes from the -OH groups number 2 and 3 which are bound to the C atom with a conjugated double bond so that they can donate hydrogen ions to various oxidant compounds, such as free radicals. This study aims to determine the content of secondary metabolites from crystal guava juice (psidium guajava L.), to determine the levels of Vitamin C (psidium guajava L.), and to conduct antioxidant activity tests on crystal guava juice (psidium guajava L.). The stages of this study include sample processing, phytochemical screening, qualitative analysis examination, determining vitamin C levels and determining antioxidant activity using the DPPH method with a UV-Vis spectrophotometer. The results of the study showed that the levels of vitamin C in the squeezed crystal guava flesh were 0.59441 ± 0.00032 mg/g and in the squeezed crystal guava seeds 0.32062 ± 0.00064 mg/g. While the antioxidant activity with the IC50 results of the squeezed crystal guava flesh was 3751.3274 µg/mL in the squeezed crystal guava seeds 2785.2941 µg/mL and as a comparison, vitamin C with IC50 was 4.2539 µg/mL. It can be concluded that the levels of vitamin C in the squeezed crystal guava flesh were higher than in the squeezed crystal guava seeds. The strength of the antioxidant activity was very weak because the sample used was a squeeze obtained by filtering using flannel cloth.
POTENSI BUDIDAYA BUAH NAGA DALAM MENINGKATKAN PENDAPATAN EKONOMI MASYARAKAT DESA SEI SIJENGGI KECAMATAN PERBAUNGAN KABUPATEN SERDANG BEDAGAI Hairani, Khadizah; Putri, Echa Junaini; Nisrina, Azizah; Zahrani, Miftah Aulia; Restia, Puja; Melinda, Reni; Devany, Almira; Sugiar, Sugiar
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 (2023): Volume 4 Nomor 6 Tahun 2023
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v4i6.23848

Abstract

Penelitian ini bertujuan untuk mengetahui potensi budidaya buah naga dalam meningkatkan pendapatan masyarakat Desa Sei Sijenggi. Penelitian ini menggunakan metode kualitatif deskriptif, yaitu metode yang mendeskripsikan suatu populasi, situasi, atau fenomena yang sedang diteliti. Riset ini akan senantaisa berfokus pada menjawab pertanyaan bagaimana, apa, kapan, dan di mana jika rumusan masalah penelitian, bukan mengapa dan mendeskripsikan keadaan yang akan diamati di lapangan dengan lebih spesifik, transparan, dan mendalam. Metode pengolahan data menggunakan wawancara beserta dokumen terkait disertai dengan keabsahan data yaitu triangulasi. Hasil penelitian menunjukkan bahwa potensi budidaya buah naga memang dapat meningkatkan pendapatan masyarakat desa sei sijenggi.
Co-Authors Amin Nasution, Muhammad Devany, Almira Hairani, Khadizah Nisrina, Azizah Putri, Echa Junaini Restia, Puja Ridwanto Ridwanto Sartika Daulay, Anny Sugiar, Sugiar Zahrani, Miftah Aulia