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All Journal Jurnal Entropi Sainstek Alchemy : Journal of Chemistry Jurnal Pengabdian Pada Masyarakat Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemistry Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Fullerene Journal of Chemistry JURNAL FARMASIMED (JFM) Dedikasi: Jurnal Pengabdian Masyarakat JAGE Damhil: Jurnal Pengabdian kepada Masyarakat
Suleman Duengo
Unknown Affiliation
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Profil Kandungan Kimia dan Potensi Senyawa Aktif Limbah FABA untuk Pengembangan Pupuk Berkelanjutan Wiwin Rewini Kunusa; Suleman Duengo; Julhim S. Tangio; Erni Mohamad; Nurul Fadilla Harun; Humairah Amatullah Duengo; Nuur Arif Syaifudin
Jambura Journal of Chemistry Vol 8, No 1 (2026): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jambchem.v8i1.37015

Abstract

Fly ash and bottom ash (FABA) generated from coal combustion in steam power plants have the potential to cause environmental contamination; however, their mineral content enables their reutilization as raw materials for inorganic fertilizers. This study aimed to evaluate the major metal element content in FABA-based fertilizer produced from the Anggrek Steam Power Plant, North Gorontalo Regency, in order to assess its potential as a nutrient source. Ca and Mg were analyzed using titration methods, while Al, Fe, P, and K were determined by UV–Vis spectrophotometry with good calibration curve linearity (r 0.97). The results showed that the K content in fertilizer samples 1 and 2 was 0.0189% and 0.0140%, respectively. Ca concentrations ranged from 16.8–21.6 mg/L and Mg from 7.29–10.21 mg/L. Al was detected within the range of 3.68–4.44 ppm, while Fe and P were identified in measurable amounts. The presence of Ca, Mg, and K as macronutrients indicates that FABA waste has potential as a raw material for inorganic fertilizer, while also supporting sustainable industrial waste management practices.
Total Synthesis and Potential Bioactivity of Linear Peptide LSAVTPG Anderson Arnold Aloanis; Vlagia Indira Paat; Suleman Duengo
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.790

Abstract

The total synthesis of the linear peptide LSAVTPG was successfully carried out using the solid-phase peptide synthesis (SPPS) method. The synthesis employed the Fmoc/tBu protection strategy on a 2-chlorotrityl chloride resin as the solid support. Following chain assembly, the final peptide was cleaved from the resin using 95% trifluoroacetic acid (TFA), affording the target peptide with a yield of 81.6%. Structural confirmation was performed by high-resolution mass spectrometry (HRMS), which showed an observed ion at m/z 644.3621, consistent with the calculated value of m/z 644.3619 for C₂₈H₅₀N₇O₁₀. Purity and retention characteristics were further analyzed using analytical HPLC, where the peptide exhibited a retention time of 13.536 minutes. These results demonstrate that the SPPS method with Fmoc/tBu chemistry is an efficient strategy for the synthesis of the LSAVTPG peptide with high yield and analytical confirmation. The potential bioactivity screened computationally and showed some potential such as spanning oncology, cardiometabolic regulation, neurodegeneration, immunology, and inflammation.
Penguatan Kompetensi Mahasiswa dalam Pengambilan Sampel Air melalui Pendekatan Learning by Doing Vivi Dia Afrianti Sangkota; Suleman Duengo; Erga Kurniawati; Thayban Thayban
Damhil: Jurnal Pengabdian kepada Masyarakat Vol 5, No 1: June 2026
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/damhil.v5i1.40722

Abstract

Water sampling skills are essential competencies for chemistry students because the accuracy of sampling procedures determines the representativeness and reliability of water quality analysis data. However, students still have limited understanding of sampling-point selection, the use of sampling equipment and containers, labeling, preservation, and field measurement of water quality parameters. This community service activity aimed to strengthen students’ competence in water sampling through a learning-by-doing approach. The program employed educational and training methods, including theoretical instruction, equipment demonstrations, field practice, discussion, and evaluation using pretest and posttest instruments. The evaluation covered four indicators: basic principles of water quality and monitoring, sampling-point selection and procedures, equipment use, labeling and sample preservation, and measurement of pH, temperature, turbidity, and dissolved oxygen. The evaluation results showed that the students’ average understanding increased from 58.75% before the training to 84.00% after the training, representing an increase of 25.25%. The highest improvement was found in equipment use, labeling, and sample preservation, with an increase of 27%. Descriptively, these findings indicate that the learning-by-doing approach strengthened students’ understanding and practical skills in water sampling and handling. Similar training should be continued through periodic practice and the development of a student-based water quality monitoring group.
Co-Authors A. Ghanaim Fasya Ahmad Chandra Lakasan Ahmad Kadir Kilo Akram La Kilo Akram La Kilo Anderson Arnold Aloanis Anderson Arnold Aloanis Arviani Arviani Arviani Astin Lukum Bait, Dewimuliawati J. Boima Situmeang Chairil Anwar Deasy Natalia Botutihe Erga Kurniawati Erni Mohamad Hendri Iyabu Humairah Amatullah Duengo Julhim S. Tangio Jumina Jumina La Ode Aman M. Rahman Mardjan Paputungan Musa, Weny J.A. Naiyo, Marlina H. Najmi Abdjul Netty Ino Ischak Nita Suleman Nurhayati Bialangi Nurul Fadilla Harun Nuur Arif Syaifudin Opir Rumape Pakuna, Nurpepi Podungge, Muhamad Ramdhan Qalifa Mashita Baga Rurini Retnowati Rurini Retnowati Ruslan, Rusnawati Thayban Thayban Van Gobel, Sri Indriyani Vivi Dia Afrianti Sangkota Vlagia Indira Paat Warsito Warsito Warsito Warsito Wenny JA Musa Weny J.A Musa Wiwin Rewini Kunusa Yusuf, Andriyana Yuszda K Salimi Zelita Fitri Ente