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All Journal ULIN: Jurnal Hutan Tropis Journal of Management Studies and Development
Astuti, Reni Puji
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Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Social Sciences

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Potensi pemanfaatan tumbuhan invasif daun sacha inchi (Plukenetia volubilis) sebagai antioksidan Sari, Nur Maulida; Aryani, Farida; Wartomo, Wartomo; Paurru, Periani; Lumbanraja, Gabriel Permadi; Astuti, Reni Puji; Rudito, Rudito
ULIN: Jurnal Hutan Tropis Vol 8, No 1 (2024)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v8i1.13203

Abstract

Aktivitas antioksidan dan antibakteri pada jenis tumbuhan invasif berpotensi sebagai obat telah diidentifikasi. Tumbuhan yang digunakan adalah bagian daun tumbuhan sacha inchi (Plukenetia volubilis). Tumbuhan diketahui memiliki kandungan antioksidan dan antibakteri yang diketahui aman dikonsumsi oleh manusia. Masyarakat memiliki kecenderungan memanfaatkan tumbuhan sebagai alternatif pengobatan alami. Penelitian ini bertujuan untuk mendapatkan informasi kandungan kimia tumbuhan serta mengetahui potensi antioksidan pada ekstrak etanol daun sacha inchi (Plukenetia volubilis). Analisis fitokimia dilakukan dengan menggunakan metode uji kualitatif mengacu pada Harborne dan Kokate. Pengujian aktivitas antioksidan dilakukan dengan menggunakan metode uji dekolorisasi radikal bebas DPPH. Hasil analisis fitokimia menunjukkan ekstrak etanol daun sacha inchi (Plukenetia volubilis) mengandung alkaloid, flavonoid, triterpenoid, tanin dan saponin. Aktivitas antioksidan ekstrak etanol daun sacha inchi (Plukenetia volubilis) menunjukkan kemampuan menghambat radikal bebas DPPH sebesar 84 % pada konsentrasi 100 ppm. Hasil penelitian ini menunjukkan bahwa ekstrak etanol daun sacha inchi (Plukenetia volubilis) memiliki kandungan antioksidan alami dan berpotensi untuk dikembangkan lebih lanjut serta memberikan informasi ilmiah sebagai dasar penggunaan tumbuhan sebagai antioksidan alami.
Job Stress and Job Involvement: The Direct Role of Perceived Coworker Support Astuti, Reni Puji; Kurniawan, Ignatius Soni; Kusuma, Nala Tri
Journal of Management Studies and Development Vol. 4 No. 03 (2025): Forthcoming Issue - Journal of Management Studies and Development
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jmsd.v4i03.1418

Abstract

This study examines the relationship between job stress and job involvement, and evaluates the direct role of perceived coworker support within an educational foundation setting. Using a quantitative survey involving all 75 employees of the Mahaduna Rohmatul Umam Foundation, data were analyzed using PLS-SEM. The results indicate that job stress does not significantly influence job involvement. Meanwhile, perceived coworker support demonstrates a strong and significant direct effect on job involvement, although it does not moderate the relationship between job stress and job involvement. These findings suggest that supportive colleagues can sustain employee involvement even when job stress is present. The study partially supports the Job Demands- Resources Model by highlighting the importance of job resources, particularly social support, in maintaining involvement. Practically, organizations are encouraged to foster collaboration and open communication to strengthen employees’ job involvement.
Co-Authors Farida Aryani Ignatius Soni Kurniawan kusuma, nala tri Lumbanraja, Gabriel Permadi Paurru, Periani Rudito Rudito Sari, Nur Maulida Wartomo, Wartomo