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All Journal Sains Natural: Journal of Biology and Chemistry Bakti Cendana: Jurnal Pengabdian Masyarakat Molekul: Jurnal Ilmiah Kimia Journal of The Indonesian Society of Integrated Chemistry
Taek, Maximus M.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Materials Science & Nanotechnology Nursing Social Sciences

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Adsorption of Methylene Blue using the Biosorbent of Coconut Fiber Activated by Nitric Acid Baunsele, Anselmus Boy; Kopon, Aloisius Masan; Boelan, Erly Grizca; Leba, Maria A. U.; Komisia, Faderina; Tukan, Maria B.; Taek, Maximus M.; Tukan, Gerardus D.; Missa, Hildegardis; Siswanta, Dwi; Naat, Johnson N.; Rahayu, Rahayu
Molekul Vol 19 No 1 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.1.9443

Abstract

The textile industry in the world keeps increasing, but it harms environmental pollution caused by textile dye waste. Synthetic dyes contain carcinogenic and mutagenic ingredients that can demage the environment and aquatic biota. The alternative to handling dye pollution with a low-cost method is adsorption using nitric acid-activated coconut fiber. Coconut fiber was an abundant agricultural waste and economical, and it had an active site that contained many compounds such as cellulose, lignin, pyroligneous acid, and tannin molecules. This study used the UV-Vis Spectrophotometer analysis method to determine the effect of pH, contact time, and coconut fiber on the adsorption capacity of methylene blue. The result showed that the optimal conditions for adsorption were a pH of 5, a contact time of 75 minutes, and a percentage adsorption of the variation of contact time of 99.628%. The adsorption study was according to a pseudo-second-order reaction with a constant reaction rate of 0.050 g mg-1 minute-1. The maximum adsorption capacity was 2 mg g-1, with the percentage of methylene blue adsorbed at 99.84%. Adsorption occurs chemically with an energy of 35.4 kJ mol-1, so it can be determined that it occurs with a monolayer mechanism.
Pigmen Umbi Ubi Jalar Ungu dan Rimpang Kunyit: Indikator Ramah Lingkungan dan Murah untuk Eksperimen Titrasi Asam-Basa Leba, Maria Aloisia Uron; Mau, Sisilia Daeng Bakka; Boelan, Erly Grizca; Taek, Maximus M.; Ruas, Juvencio de Castro; Lawung, Yustina D.; Ruas, Adilson de Castro; Kopon, Aloisius Masan; Ruas, Noemia A.
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 2 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i2.28648

Abstract

[Pigments of Purple Sweet Potato and Turmeric Rhizome: Eco-Friendly and Cheap Indicators for Acid-Base Titration Experiment] Tujuan dari penelitian ini adalah mengkaji karakter pigmen umbi ubi jalar ungu (PUUJU) dan pigmen rimpang kunyit (PRK) pada larutan uji dan penggunaannya sebagai indikator titrasi asam basa dibandingkan dengan indikator fenolftalein. PRK diekstraksi dengan pelarut etanol sedangkan PUUJU diekstraksi dengan pelarut etanol dalam suasana asam. PUUJU dan PRK diuji karakter perubahan warnanya dan digunakan sebagai indikator titrasi HCl-NaOH dan CH3COOH-NaOH. Hasil penelitian menunjukkan PUUJU berwarna merah pada pH 1, pink pada pH 2-6, ungu pada pH 7, biru pada pH 8-9, hijau pada pH 10-11 dan kuning pada pH 12-14. PRK menunjukkan warna kuning pada pH 1-7, merah bata pudar pada pH 8 dan semakin pekat seiring naiknya nilai pH larutan. Kedua pigmen ini mampu menunjukkan perubahan warna yang jelas pada titik akhir titrasi layaknya indikator fenolftalien. Diperoleh konsentrasi HCl pada titrasi menggunakan indikator PP, PUUJU dan PRK berturut-turut adalah 0,1031 M, 0,1045 M dan 0,1025 M sedangkan konsentrasi CH3COOH berturut-turut adalah 0,0876 M, 0,0869 M dan 0,0853 M. Berdasarkan data-data ini, PUUJU dan PRK dapat digunakan sebagai indikator titrasi HCl-NaOH dan CH3COOOH-NaOH dalam praktikum kimia di kelas. Kata kunci/keyword: Volumetri, pigmen alami, ubi jalar ungu, kunyit, volumetry, natural pigment, purple sweet potato, turmeric rhizome.
Penguatan Kapasitas Pengelolaan BUMDes Di Desa Pariti, Kecamatan Sulamu Kabupaten Kupang-NTT Baunsele, Anselmus Boy; Boelan, Erly G.; Tukan, Gerardus Diri; Taek, Maximus M.; Amaral, Maria Agustin Lopes; Missa, Hildegardis; Sooai, Adri Gabriel; Sinlae, Alfry A. J.; Ratumakin, Paulus A. K. L.; Ketmoen, Adrianus
Bakti Cendana Vol 6 No 1 (2023): Bakti Cendana: Jurnal Pengabdian Masyarakat
Publisher : LPPM Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/bc.6.1.2023.37-48

Abstract

Badan Usaha Milik Desa (BUMDes) merupakan suatu badan usaha berbadan hukum, yang bertujuan untuk dapat meningkatkan perekonomian desa khususnya untuk peningkatan kesejahteraan masyarakat. Kegiatan penguatan kapasitas pengelolaan BUMDes dan sharing pengalaman pengelolaannya dalam kegiatan pengabdian pada masyarakat ini, bertujuan untuk dapat memberikan pengetahuan dan pengalaman baru bagi masyarakat. Kegiatan ini dilaksanakan di Desa Pariti, Kecamatan Sulamu, Kabupaten Kupang. Kegiatan ini diikuti oleh 20 oang peserta diantaranya Pemerintah Desa, pengurus BUMDes Gempar dan tokoh masyarakat. Metode pelaksanaan berupa sosialisasi melalui ceramah dan diskusi, sharing pengalaman dengan Kepala Desa Hadakewa serta hasil tes kemampuan (pre test dan post test). Kesimpulan dari hasil kegiatan ini yaitu terdapat peningkatan kemampuan terhadap substansi dan sistem tata kelola BUMDes. Kedepannya kegiatan ini dapat dilanjutkan dengan menghadirkan narasumber-narasumber yang telah sukses mengelola BUMDes
The Effect of Solvent Types on The Antibacterial and Cytotoxic Activity of Lino Bark Extract Landi Pote, Lodowik; Taek, Maximus M.; Nadut, Anggelinus; Latumakulita, Gertreda
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 3 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i3.825

Abstract

The G. koordersiana Burret plant, especially its bark, is used by the Sumba community to treat wounds, ulcers, and liver. This study aims to determine the effect of solvent types on the antibacterial and cytotoxic activity of G. koordersiana Burret extract. The research methods used were maceration method, antibacterial test, and cytotoxic test of G. koordersiana Burret bark extract. The results showed that the yield of ethanol, methanol, and n-hexane extracts were 42.15%; 41.65%; and 0.62%, respectively. Ethanol and methanol extracts had antibacterial activity against E. coli and S. aureus bacteria, while n-hexane extract did not show antibacterial activity against both bacteria. Cytotoxic tests showed that the LC50 values ​​of ethanol, methanol, and n-hexane extracts were 61.35 ppm; 758.58 ppm; and 2,494,181.19 ppm, respectively. Ethanol and methanol extracts had antibacterial activity and were toxic, while n-hexane extract did not show antibacterial activity and was not toxic. The antibacterial and cytotoxic activities of ethanol and methanol extracts showed the presence of secondary metabolite compounds of the alkaloid, phenolic, flavonoid, tannin, triterpenoid, and saponin groups, while n-hexane extract contained triterpenoid compounds that had no inhibitory power against bacteria or cytotoxic activity.
Co-Authors Adri Gabriel Sooai Adrianus Ketmoen Alfry Aristo Jansen Sinlae Anggelinus Nadut Anselmus Boy Baunsele Boelan, Erly G. Dwi Siswanta Erly Grizca Boelan Faderina Komisia Gerardus Diri Tukan Gertreda Latumakulita Hildegardis Missa Kopon, Aloisius Masan Landi Pote, Lodowik Leba, Maria A. U. Maria Aloisia Uron Leba Maria Augustin Lopes Amaral Maria Benedikta Tukan Naat, Johnson N. Rahayu Rahayu Ratumakin, Paulus A. K. L. Ruas, Adilson de Castro Ruas, Juvencio de Castro Ruas, Noemia A. Sisilia Daeng Bakka Mau Tukan, Gerardus D. Yustina Dwisofiani Lawung