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All Journal JOEY : Journal of English Ibrahimy Indenesian Journal of Tropical Biology Indenesian Journal of Tropical Biology
Kholidi, Muh. Azhar
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Social Sciences

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Reinterpreting Problem-Based Learning in EFL Speaking Classrooms: Indonesian University Teachers’ Pedagogical Perspectives: English Purmayanti, Devi; Kholidi, Muh. Azhar; Nasution, Riandry Fadilah
JOEY: Journal of English Ibrahimy Vol. 5 No. 1 (2026): JOEY:Journal of English Ibrahimy
Publisher : Fakultas Ilmu Sosial dan Humaniora, Universitas Ibrahimy

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/joey.2026.v5i1.20-36

Abstract

Problem-Based Learning (PBL) has gained prominence as a pedagogical approach for promoting learner autonomy, critical thinking, and communicative competence. However, little is known about how PBL is interpreted, adapted, and enacted by teachers in English as a Foreign Language (EFL) speaking classrooms, particularly in Indonesian higher education. This qualitative study examined Indonesian university EFL teachers’ perceptions and enactment of PBL in speaking instruction. Semi-structured interviews were conducted with five instructors from diverse institutional contexts and analyzed using thematic analysis. The findings show that teachers did not implement PBL as a fixed instructional model but reinterpreted it as a context-sensitive, fluency-oriented pedagogy shaped by learner readiness, classroom culture, and institutional constraints. While PBL was perceived to enhance student engagement, speaking confidence, and willingness to communicate, it was primarily adapted as discussion- and task-based activities rather than sustained inquiry cycles. These adaptations reveal how teacher cognition and local educational conditions mediate global pedagogical models. By foregrounding teachers situated enactment of PBL, this study extends existing PBL theory in EFL contexts and challenges assumptions that learner-centered pedagogies transfer seamlessly across settings. The study proposes a more context-responsive understanding of PBL for EFL speaking instruction and offers implications for teacher education, curriculum design, and institutional support in similarly constrained contexts.
Comparison of Antibacterial Activity and Physicochemical Characteristics of Vco (Virgin Coconut Oil) With Different Manufacturing Methods Hadi, Hana Safitri Putri; Sarkono; Kusuma, A.A. Ngurah Nara; Kholidi, Muh. Azhar
Indonesian Journal of Tropical Biology Vol. 2 No. 1 (2026): April
Publisher : Yayasan Siti Widhatul Faeha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65622/ijtb.v2i1.279

Abstract

Cocos nucifera is an important plantation commodity in Indonesia with high economic value and considerable potential for the development of value-added products, including Virgin Coconut Oil. This study aimed to compare the physicochemical characteristics and antibacterial activity of VCO produced using heating, fermentation, and enzymatic methods. The research was conducted experimentally from June to August 2024 at the Advanced Biology Laboratory, Faculty of Mathematics and Natural Sciences, University of Mataram. VCO samples were evaluated through organoleptic tests and physicochemical analyses, including yield, moisture content, peroxide value, and free fatty acid content. Antibacterial activity was tested against Staphylococcus aureus and Escherichia coli using the disk diffusion method. The results showed that all VCO samples generally met Indonesian National Standard quality requirements, except for free fatty acid content in some treatments. The fermentation method produced the highest yield (31.88%), while the heating method resulted in the best overall quality, characterized by 0% moisture content, 0 mg Eq/kg peroxide value, and the highest organoleptic acceptance. All VCO samples exhibited antibacterial activity, although the inhibition zones were categorized as weak. The findings indicate that the heating method is the most suitable for producing high-quality VCO with antibacterial potential.
Comparison of Antibacterial Activity and Physicochemical Characteristics of Vco (Virgin Coconut Oil) With Different Manufacturing Methods Hadi, Hana Safitri Putri; Sarkono; Kusuma, A.A. Ngurah Nara; Kholidi, Muh. Azhar
Indonesian Journal of Tropical Biology Vol. 2 No. 1 (2026): April
Publisher : Yayasan Siti Widhatul Faeha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65622/ijtb.v2i1.279

Abstract

Cocos nucifera is an important plantation commodity in Indonesia with high economic value and considerable potential for the development of value-added products, including Virgin Coconut Oil. This study aimed to compare the physicochemical characteristics and antibacterial activity of VCO produced using heating, fermentation, and enzymatic methods. The research was conducted experimentally from June to August 2024 at the Advanced Biology Laboratory, Faculty of Mathematics and Natural Sciences, University of Mataram. VCO samples were evaluated through organoleptic tests and physicochemical analyses, including yield, moisture content, peroxide value, and free fatty acid content. Antibacterial activity was tested against Staphylococcus aureus and Escherichia coli using the disk diffusion method. The results showed that all VCO samples generally met Indonesian National Standard quality requirements, except for free fatty acid content in some treatments. The fermentation method produced the highest yield (31.88%), while the heating method resulted in the best overall quality, characterized by 0% moisture content, 0 mg Eq/kg peroxide value, and the highest organoleptic acceptance. All VCO samples exhibited antibacterial activity, although the inhibition zones were categorized as weak. The findings indicate that the heating method is the most suitable for producing high-quality VCO with antibacterial potential.
Co-Authors Hadi, Hana Safitri Putri Kusuma, A.A. Ngurah Nara Nasution, Riandry Fadilah Purmayanti, Devi