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All Journal Hijaz: Jurnal Ilmu-Ilmu Keislaman Journal of Academic Biology and Biology Education
Muhammad Iqbal
Universitas Islam Negeri Syarif Hidayatullah Jakarta
Religion Humanities Biochemistry, Genetics & Molecular Biology Education Veterinary Other

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Bacteria–Molasses Synergy in Heterotrophic Systems: A Sustainable Strategy for Catfish Survival and Water Quality Improvement Muhammad Iqbal; Zharifa Rasul
Journal of Academic Biology and Biology Education Vol. 2 No. 1 (2025): June
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jouabe.v2i1.2087

Abstract

Purpose of the study: This study aimed to evaluate the survival of catfish (Clarias gariepinus) in an intensive heterotrophic culture system, focusing on the effects of the system on fish survival, growth, and health. Furthermore, this study aimed to identify environmental factors that support successful cultivation in an intensive heterotrophic system. Methodology: This study used 12 fiber tanks with a funnel-shaped bottom and The study used 12 fiber tanks (250 L) with a density of 20 catfish (± 50 g/tail) and four treatments: feed only, feed+molasses, feed+bacteria, and feed+molasses+bacteria (heterotrophic system), each with three replications. Survival parameters and water quality (temperature, pH, DO, ammonia, nitrite, nitrate, VSS) were measured periodically. Data were analyzed using one-way ANOVA followed by a 5% Duncan test. Main Findings: The analysis results show that the heterotrophic system produces good catfish survival and water quality that supports the growth of catfish. The heterotrophic system is able to increase the survival of catfish in intensive cultivation by up to 80–90%, reduce the concentration of ammonia to 0.98 mg/L, nitrite to 1.06 mg/L, and nitrate, thus producing water quality that is very supportive of the success of intensive cultivation. In addition, the highest volatile suspended solid value was recorded at 0.90 mg/L in the heterotrophic system. Novelty/Originality of this study: This research presents a new approach to intensive catfish to simultaneously improve fish survival and optimize water quality. These findings expand knowledge on nitrogen waste management and provide practical strategies for the development of sustainable aquaculture technologies.
Fenomena Overthinking pada Generasi Muda dan Solusi Spiritual dalam Perspektif Islam Rovi Muhammad Rochmat; Muhammad Iqbal
Hijaz: Jurnal Ilmu-Ilmu Keislaman Vol. 5 No. 2 (2025)
Publisher : Medan Resource Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57251/hij.v5i2.2251

Abstract

Overthinking has emerged as a prevalent psychological concern among younger generations, particularly adolescents and university students. Academic pressures, increasing social expectations, and intensive exposure to social media have contributed to heightened anxiety and emotional instability within these populations. This study aims to analyze the phenomenon of overthinking among young people and to examine spiritual approaches to addressing it from an Islamic perspective. Employing a descriptive qualitative design with a library research approach, the study draws upon data obtained from scholarly books, peer-reviewed journal articles, academic publications, and Islamic sources relevant to mental health and spirituality. The findings indicate that overthinking is primarily associated with social pressure, persistent self-comparison facilitated by social media, and inadequate emotional regulation. From an Islamic perspective, several spiritual practices and values—including tawakkul (reliance upon Allah), dhikr (remembrance of Allah), husn al-zann (positive assumptions and thinking), and the cultivation of a balanced relationship between worldly responsibilities and spiritual needs—provide meaningful strategies for mitigating excessive rumination. These spiritual principles encourage individuals to develop acceptance, emotional regulation, positive cognitive orientations, and greater spiritual awareness when confronting uncertainty and psychological distress. The study concludes that integrating Islamic spiritual values into everyday life can contribute to greater inner tranquility, strengthen psychological resilience, and reduce excessive anxiety and overthinking among younger generations.
Co-Authors Rovi Muhammad Rochmat Zharifa Rasul