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All Journal Journal of Agrosociology and Sustainability Jurnal Riset dan Pengabdian Interdisipliner
Siregar, Alwi Gery Agustan
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Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Medicine & Pharmacology Social Sciences Other

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Ekstraksi senyawa tanin dalam ampas kopi sebagai sumber daya tanin terbarukan Suhaila, Rif'ati; Husna, Zakiatul; Manurung, Renita; Siregar, Alwi Gery Agustan
Journal of Agrosociology and Sustainability Vol. 1 No. 2: (January) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/jassu.v1i2.2024.304

Abstract

The increase in global coffee consumption causes an increase in the amount of waste. One of the components of coffee grounds waste that is thrown into the environment is tannin. Tannins are applied in various industries, including the textile, pharmaceutical, cosmetic and food industries. The research aims to observe the effect of temperature and extraction time on tannin content using the ultrasonic extraction method. Extraction was carried out using 80% ethanol solvent with 2 variations, namely, variations in extraction temperature (40, 45, 50, 55, and 60) ˚C and extraction time (10, 20, 30, 40, 50, and 60) minutes. Extracts containing tannins were then analyzed qualitatively and quantitatively. Tannin levels were tested qualitatively using FeCl3 and Gelatin, and quantitative analysis was carried out using a UV-VIS Spectrophotometer. The functional groups contained in the tannin extract were tested using the FTIR (Fourier Transform Infra Red) Spectroscopy method. The highest tannin content was obtained at an extraction temperature of 55°C and an extraction time of 10 minutes, amounting to 215.85 mg/g-1. The tannins contained in coffee grounds extract are condensed tannins.
Sosialisasi Modul Ajar Berbasis Digital Bagi Guru MTs. Swasta Ummul Quraa Wahyuni, Ratna; Nasution, Haryati Ahda; Siregar, Alwi Gery Agustan
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Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jrpi.v1i1.30495

Abstract

The Merdeka Curriculum is an innovative step in the Indonesian education system which aims to improve the quality of learning based on student needs and potential. This service aims to develop teaching modules that are in accordance with the principles of the Independent Curriculum, namely learning that is student-centered, flexible, and relevant to the needs of the 21st century for Ummul Quraa Private MTs teachers. Socialization Teaching modules are designed to provide contextual learning experiences, oriented towards developing students' literacy, numeracy and character competencies. These benefits include improving the quality of learning, optimizing the use of school resources, and strengthening collaboration between teachers, students 
Sosialisasi dan Pelatihan Quizizz sebagai Media Asesmen Pembelajaran Digital untuk Mahasiswa jurusan Matematika UISU Siregar, Alwi Gery Agustan; Wahyuni, Ratna; Nasution, Haryati Ahda
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Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jrpi.v3i1.36200

Abstract

Digital transformation in education demands the use of interactive and adaptive assessment media, particularly in mathematics learning at the higher education level. This community service activity aims to enhance the competencies of students in the Mathematics Department of Universitas Islam Sumatera Utara (UISU) in utilizing Quizizz as a digital learning assessment tool. The methods employed include socialization, interactive training, discussions, and hands-on practice in creating and using Quizizz-based quizzes. The results indicate a high level of participant engagement during the training, with 100% of students actively involved in quiz creation practices, 81% participating in discussions, and 75% asking questions. This level of engagement had a positive impact on the effectiveness of Quizizz usage, as evidenced by increases in problem-solving speed by 21.4%, answer accuracy by 32.3%, student engagement scores by 46.6%, and conceptual understanding by 41.8% after the training. These findings demonstrate that a practice-based and participatory training approach is effective in improving the quality of digital assessment and students’ conceptual understanding. Therefore, Quizizz is recommended as an innovative digital assessment medium to support mathematics learning in higher education.
Co-Authors Haryati Ahda Nasution Husna, Zakiatul RATNA WAHYUNI Renita Manurung Suhaila, Rif'ati