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All Journal Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan NIHAYAH AN-NUR: Jurnal Pendidikan dan Pembelajaran
Maqfirah, Siti
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Religion Humanities Earth & Planetary Sciences Education Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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Comparative analysis of acids and temperatures in gelatin extraction from the skin of yellowfin tuna (Thunnus albacares) Prajaputra, Vicky; Agustina, Sri; Isnaini, Nadia; Nabila, Agillia; Margolang, Hikma Kasih; Apriani, Sahra; Maqfirah, Siti
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 13, No 3 (2024): DECEMBER 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.3.41269

Abstract

Gelatin, a valuable biopolymer, is commonly derived from animal by-products such as fish skin, providing a sustainable alternative to traditional bovine and porcine sources. The extraction process is influenced by factors like acid type and temperature, which impact both yield and quality. This study aimed to compare the effects of citric acid and acetic acid, at two temperatures (50C and 60C), on the gelatin extracted from yellowfin tuna (Thunnus albacares) skin. The extracted gelatin was evaluated for yield, proximate composition, functional groups using FTIR, and surface morphology through SEM. Results indicated that acetic acid produced a significantly higher yield than citric acid at both temperatures, with the highest yield (10.10%) at 50C and the lowest (2.46%) from citric acid at 60C. Gelatin extracted with acetic acid also had higher protein content and lower moisture and ash levels. FTIR analysis confirmed the presence of characteristic gelatin functional groups, including Amide I, II, and III. SEM images showed a denser and more uniform structure in acetic acid-extracted gelatin, while gelatin extracted with citric acid had a more porous and irregular surface. SDS-PAGE analysis revealed stronger protein bands for gelatin extracted with acetic acid, indicating higher protein content and a more efficient extraction process. Both acid-extracted gelatins showed -chains and -chains, characteristic of denatured collagen. In conclusion, acetic acid proved to be more effective than citric acid in producing higher yield and superior quality gelatin from yellowfin tuna skin. Further studies should assess the gel strength and amino acid composition of the extracted gelatin.Keywords:environmental chemistrybelow waterbiopolymergelatinmarine chemistrywaste valorizationyellowfin tuna
Comparative analysis of acids and temperatures in gelatin extraction from the skin of yellowfin tuna (Thunnus albacares) Prajaputra, Vicky; Agustina, Sri; Isnaini, Nadia; Nabila, Agillia; Margolang, Hikma Kasih; Apriani, Sahra; Maqfirah, Siti
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 13, No 3 (2024): DECEMBER 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.3.41269

Abstract

Gelatin, a valuable biopolymer, is commonly derived from animal by-products such as fish skin, providing a sustainable alternative to traditional bovine and porcine sources. The extraction process is influenced by factors like acid type and temperature, which impact both yield and quality. This study aimed to compare the effects of citric acid and acetic acid, at two temperatures (50C and 60C), on the gelatin extracted from yellowfin tuna (Thunnus albacares) skin. The extracted gelatin was evaluated for yield, proximate composition, functional groups using FTIR, and surface morphology through SEM. Results indicated that acetic acid produced a significantly higher yield than citric acid at both temperatures, with the highest yield (10.10%) at 50C and the lowest (2.46%) from citric acid at 60C. Gelatin extracted with acetic acid also had higher protein content and lower moisture and ash levels. FTIR analysis confirmed the presence of characteristic gelatin functional groups, including Amide I, II, and III. SEM images showed a denser and more uniform structure in acetic acid-extracted gelatin, while gelatin extracted with citric acid had a more porous and irregular surface. SDS-PAGE analysis revealed stronger protein bands for gelatin extracted with acetic acid, indicating higher protein content and a more efficient extraction process. Both acid-extracted gelatins showed -chains and -chains, characteristic of denatured collagen. In conclusion, acetic acid proved to be more effective than citric acid in producing higher yield and superior quality gelatin from yellowfin tuna skin. Further studies should assess the gel strength and amino acid composition of the extracted gelatin.Keywords:environmental chemistrybelow waterbiopolymergelatinmarine chemistrywaste valorizationyellowfin tuna
DOA DALAM GENGGAMAN: ANALISIS PENGGUNAAN APLIKASI WIRID REMINDER DI KALANGAN MILENIAL URBAN Maqfirah, Siti
NIHAYAH: Journal of Islamic Studies Vol. 1 No. 2 (2025): NIHAYAH: Journal of Islamic Studies
Publisher : Yayasan An-Nur Meunara Baro

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Abstract

The rise of digital technology has reshaped how urban millennials practice their faith, particularly in daily devotions such as wirid and prayer. This article explores the phenomenon of wirid reminder app usage among Indonesian urban millennials, focusing on usage patterns, motivations, and spiritual-psychological impacts. Employing a mixed-methods approach, data were gathered through an online survey of 200 active users, in-depth interviews with 15 intensive users and 5 app developers, as well as digital observation of five popular applications and related online user forums. Findings reveal that 75% of users access the app during commutes or work breaks, with notification and progress tracking features being the most popular. Key motivations include the need for spiritual consistency and peer influence. While the app supports the reinforcement of spiritual routines, some users experience notification fatigue due to excessive alerts. Additionally, ethical concerns arise regarding the monetization model of premium subscription for advanced features, highlighting a tension between digital convenience and commodification of religious practice. The article recommends that app developers incorporate culturally contextualized content and promote mindful spiritual engagement rather than fostering dependency on digital reminders. This study underscores the need for a holistic and ethical framework in designing digital spirituality platforms for contemporary users.
EKSKLUSIVITAS PENDIDIKAN AGAMA ISLAM DAN ANCAMAN TERHADAP TOLERANSI Maqfirah, Siti
AN-NUR: Jurnal Pendidikan dan Pembelajaran Vol. 1 No. 2 (2025): AN-NUR : Jurnal Pendidikan dan Pembelajaran
Publisher : Yayasan An-Nur Meunara Baro

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Abstract

This article explores the phenomenon of exclusivity in Islamic Religious Education (IRE) in various educational institutions across Indonesia and its impact on declining tolerance within a multicultural society. The study is motivated by the growing tendency to deliver religious content in a narrow, dogmatic manner that often limits dialogue with other belief groups. Utilizing a qualitative approach through literature review and curriculum policy analysis, this research examines the content of IRE teaching materials and student attitudes toward diversity. The findings indicate that the IRE curriculum, which lacks space for inclusive and pluralistic perspectives, tends to reinforce a "us versus them" narrative and fosters exclusive attitudes that contribute to social polarization. These findings are supported by case studies in religion-based schools, where students show limited readiness to interact with individuals of different faiths. In this context, teachers play a crucial role in shaping students’ religious reasoning; however, the lack of training on tolerance issues further amplifies exclusivity. This article proposes solutions including IRE curriculum reform based on interfaith dialogue and teacher training that emphasizes values of moderation and multiculturalism. The study concludes that it is essential to reconstruct IRE from an exclusive to an inclusive model to promote social harmony and prevent fragmentation in Indonesia’s plural society. Policy recommendations include the integration of tolerance materials into the curriculum and strengthening collaboration between the Ministry of Religious Affairs, Ministry of Education, and civil society organizations in overseeing religious education.
Co-Authors Apriani, Sahra Isnaini, Nadia Margolang, Hikma Kasih Nabila, Agillia Prajaputra, Vicky Sri Agustina, Sri