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Pendidikan Kimia FKIP Universitas Tadulako Palu Indonesi 94119
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Effect of Solvent Differences on Flavonoid Levels and Antioxidant Activity of Hass Avocado Peel (Persea Americana Hass) Mery Napitupulu; Nurhikma Nurhikma; Daud K. Walanda; Detris Poba
Jurnal Akademika Kimia Vol. 14 No. 1 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i1.pp51-57

Abstract

The Hass avocado fruit (Persea Americana Hass) comes from Australia. The color of the Hass avocado skin when it is still raw is green, and when it is ripe, it is black. This study aims to see the effect of different solvents in determining the levels of flavonoids and the antioxidant activity of Hass avocado peel extract. Determination of flavonoid levels using UV-Vis spectrophotometry and for antioxidant activity using 2,2-diphenyl-1-pikrihydrazyl (DPPH) as a source of free radicals, and vitamin C as a positive control, and UV-Vis spectrophotometry to measure the absorbance of Hass avocado peel extract. The results showed that the flavonoid content in the ethanol extract of avocado peel was 2.078 mg/100 mg extract, and for the methanol extract of Hass avocado peel was 1.995 mg/100 mg extract. For the antioxidant activity test, the IC50 value of the ethanol extract of avocado peel was 134.181 mg/L, while the IC50 value of vitamin C was 19.815 mg/L. For the methanol extract of Hass avocado rind, the IC50 value was 149.611 mg/L, while for vitamin C, the IC50 value was 37.093 mg/L. Ethanol extract and methanol extract of Hass avocado peel (Persea Americana hass) are classified as moderately strong antioxidants based on IC50 values.
The Extraction of Nickel from Morowali Laterite Ore with Sulfuric Acid (H2SO4) Yuliani Yuliani; Daud K. Walanda; Mery Napitupulu; Sri H. V. Pulukadang; Detris Poba
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp102-107

Abstract

Efficient recovery of valuable minerals from waste materials requires optimizing key processing parameters to maximize extraction efficiency and resource utilization. This research was conducted to determine the optimal extraction conditions, which were influenced by sulfuric acid concentration, temperature, and leaching time. This study used the Taguchi method with 3 factors and 3 levels: the concentration of sulfuric acid (H2SO4) at 0.5 M, 1 M, and 2 M; temperatures at 30 °C, 60 °C, and 95 °C; and leaching times of 3 hours, 6 hours, and 12 hours. The optimum conditions obtained from the study were a temperature of 95 °C, a leaching time of 6 hours, and an acid concentration of 2 M, with an absorbance of 0.6820. These results indicate that the Taguchi method is an efficient and reliable approach for optimizing leaching parameters, thereby contributing to the development of sustainable mineral recovery from waste materials.  
Comparison of Maceration and Soxhlet Extraction Methods on Flavonoid Contents from Papaya (Carica papaya) Windi Anggraini; Mery Napitupulu; Daud K. Walanda; Detris Poba
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp112-117

Abstract

The papaya plant offers numerous benefits. Each part of the papaya plant has its benefits, starting from the fruit, stem, roots, flowers, and leaves. Livestock Medicine confirmed the presence of at least 22 types of bioactive compounds. The papaya plant contains active compounds that act as antioxidants, including flavonoids. This research aims to compare maceration and Soxhlet extraction methods on the flavonoid content of papaya (Carica papaya) leaf extract as measured using a UV-Vis spectrophotometer. The methods used to separate flavonoid levels are maceration and Soxhlet extraction. Based on the research that has been carried out, it was found that two treatments were carried out in the maceration method: the first treatment was with 70 % ethanol solvent, namely 36.6 mg / 100g or 3.66 %, for 96 % ethanol solvent, namely 77.6 mg / 100g or 7.76 %. Two treatments are also carried out in the Soxhlet method: 70% ethanol (33.6 mg/100g, 3.36%) and 96% ethanol (92.6 mg/100g, 9.26%). These results indicate that Soxhlet extraction is the most effective method for producing flavonoids in papaya leaf extract, as the levels obtained are higher than those obtained by maceration.
PELATIHAN MANAJEMEN REFERENSI BERBASIS MENDELEY DAN ZOTERO UNTUK MENDUKUNG PENYUSUNAN ARTIKEL ILMIAH DOSEN AKADEMI BINA FARMASI PALU Mery Napitupulu; Daud Karel Walanda; Alam Anshary; Nurasyah Dewi Napitupulu; Marungkil Pasaribu; Detris Poba; Reny Reny
Jurnal Abdimas Ilmiah Citra Bakti Vol. 7 No. 1 (2026)
Publisher : STKIP Citra Bakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38048/jailcb.v7i1.6279

Abstract

Permasalahan utama yang dihadapi dosen Akademi Bina Farmasi Palu adalah keterbatasan pemahaman dan keterampilan dalam mengelola referensi ilmiah secara sistematis menggunakan perangkat lunak manajemen referensi. Kondisi ini menyebabkan proses penulisan artikel ilmiah menjadi kurang efisien, terutama dalam pengelolaan sitasi dan penyusunan daftar pustaka sesuai standar penulisan ilmiah. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kompetensi dosen dalam memanfaatkan perangkat lunak manajemen referensi guna mendukung penyusunan artikel ilmiah yang berkualitas. Mitra kegiatan adalah dosen Akademi Bina Farmasi Palu. Kegiatan dilaksanakan dalam bentuk pelatihan dan bimbingan teknis yang dilaksanakan secara langsung melalui presentasi materi dan praktik penggunaan aplikasi manajemen referensi seperti Mendeley dan Zotero. Materi pelatihan meliputi pengenalan perangkat lunak manajemen referensi, teknik pelacakan sumber literatur dari basis data ilmiah, pengelolaan sitasi otomatis, serta integrasi perangkat lunak manajemen referensi dengan perangkat pengolah kata. Kegiatan juga dilengkapi dengan sesi pendampingan teknis untuk membantu peserta mengatasi kendala dalam penggunaan aplikasi. Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan keterampilan peserta dalam mengelola pustaka digital, melakukan sitasi secara otomatis, serta menyusun daftar pustaka sesuai gaya penulisan ilmiah. Peserta juga menunjukkan kemampuan yang lebih baik dalam memanfaatkan aplikasi manajemen referensi untuk mendukung proses penulisan artikel ilmiah. Dengan demikian, kegiatan pelatihan ini berkontribusi dalam meningkatkan kualitas penulisan ilmiah dosen serta mendukung penguatan budaya publikasi akademik di Akademi Bina Farmasi Palu.
Co-Authors Afadil Agustin Tiwow Alam Anshary Arini Ramadani Azzajjad, Muhammad Fath Daud Karel Walanda Dewi Satria Ahmar Fitriani Fitriani Hasmawati Hasmawati Ijirana Jamaludin M Sakung Kasmudin Mustapa Kusrini Burase Magfirah Magfirah Marungkil Pasaribu Meida E. Marpaung Mery Napitupulu Nurasyah Dewi Napitupulu Nurhikma Nurhikma Reny Reny Reski Amelia Sitti Rahmawati Sri H. V. Pulukadang Taslima Windi Anggraini Yuli Nurmayanti Yuliani Yuliani