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Penguatan Potensi Lokal melalui Sosialisasi Inovasi Produk Dodol Salak di Desa Narigunung Satu, Kecamatan Tiganderket, Kabupaten Karo, Sumatera Utara Siti Mahmudha; Inten Pangestika; Pina Budiarti Pratiwi; Sulwiyatul Kamariyah Sani; adelia Yesya Putri Hasibuan
Jurnal Bakti Nusantara Vol. 3 No. 3 (2026): Jurnal Bakti Nusantara
Publisher : Pustaka Media Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63763/jutira.v3i3.122

Abstract

Desa Narigunung Satu, Kecamatan Tiganderket, Kabupaten Karo, memiliki potensi besar dalam sektor pertanian, khususnya pada komoditas buah salak yang produksinya meningkat signifikan dalam beberapa tahun terakhir. Namun, potensi tersebut belum dimanfaatkan secara optimal karena masyarakat masih menjual buah salak dalam bentuk segar dengan nilai ekonomi rendah dan masa simpan singkat. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan keterampilan kelompok ibu-ibu PKK Desa Narigunung Satu dalam mengolah buah salak menjadi produk bernilai tambah, yaitu dodol salak, sebagai strategi penguatan ekonomi keluarga berbasis potensi lokal. Metode kegiatan dilakukan melalui sosialisasi, demonstrasi, serta evaluasi pengetahuan peserta menggunakan pre-test dan post-test. Hasil kegiatan menunjukkan adanya peningkatan signifikan pada pemahaman peserta terhadap proses pengolahan, pengemasan, dan pemasaran produk. Peserta juga menunjukkan motivasi tinggi untuk mengembangkan usaha kecil berbasis olahan salak. Dengan demikian, kegiatan ini berhasil menjembatani kesenjangan antara potensi pertanian lokal dan kemampuan masyarakat dalam menciptakan inovasi produk, sekaligus mendorong kemandirian ekonomi desa yang berkelanjutan.
XRD-Based Structural and Crystallite Size Analysis of Nano-MgO Prepared via Sol–gel Method Imas Masriah; Devi Lestari; Sulwiyatul Kamariyah Sani; Inten Pangestika; Dikki Miswanda
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 2 (2025): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2025.v11.i2.17909

Abstract

Nano-MgO was synthesized via a nitrate–citrate sol–gel combustion method, in which magnesium nitrate acted as the oxidizing precursor and citric acid served simultaneously as the chelating agent and organic fuel. The formation of a homogeneous Mg–citrate coordination network enabled controlled gelation, while the auto-combustion process produced a porous MgO matrix composed of ultrafine crystallites. Calcination at 800 °C promoted phase consolidation, removal of organic residues, and enhanced long-range atomic ordering. X-ray diffraction confirmed the exclusive formation of the cubic periclase phase (fm3m), with no detectable hydroxide or carbonate impurities. Crystallite size analysis yielded an average size of 16.03 nm based on the Scherrer equation, whereas the Williamson–Hall method produced a larger value of 25.44 nm with a microstrain of 5.37 × 10-4. indicating minimal lattice distortion. The discrepancy between the two size estimates reflects the contribution of microstrain effect not considered in the Scherrer approach. Overall, the synthesized nano-MgO exhibits high crystallinity, narrow crystallite size distribution, and excellent structural stability, highlighting its potential for catalytic, gas-sensing, and high-temperature functional applications. These results demonstrate that the sol–gel combustion method is an efficient and reliable strategy for producing nanocrystalline MgO with well-controlled structural characteristics.
Evaluating the Potential of Modified Niobium (V) Oxide as Catalyst for 5-Hydoxymethylfurfural (HMF) Production : A Literature Review Inten Pangestika; Imas Masriah; Devi Lestari; Ayu Syufiatun Br Tarigan; Pina Budiarti Pratiwi
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5385

Abstract

Selectively producing 5-hydroxymethylfurfural (HMF) from biomass-derived carbohydrates is key in valorizing renewable resources into biobased chemicals and fuels. HMF is a crucial bio-based platform chemical, but its selective production from glucose and fructose remains challenging due to side reactions and product degradation. Modified niobium(V) oxide (Nb2O5) catalysts have shown great promise owing to their intrinsic Brøntsted and Lewis acidity, thermal stability, and surface tunability. This review overviews recent advances in catalyst design, including metal doping, structural tuning, and hybridization with porous materials. These have significantly improved HMF yields -up to 80%- while enhancing catalyst selectivity and reusability. A systematic review with a descriptive-analytical approach was applied, analyzing literature from 2015 to 2025 across major scientific databases. Furthermore, challenges, including side-product formation and active site leaching, are highlighted alongside future perspectives for scalable and green HMF synthesis using Nb-based catalysts. This review aims to guide the rational development of modified Nb2O5 catalysts for efficient biomass transformation. These developments are crucial for advancing Nb-based catalytic platforms and unlocking the full potential of HMF in a circular, bio-based chemical industry.
Co-Authors adelia Yesya Putri Hasibuan Ayu Syufiatun Br Tarigan Devi Lestari Dikki Miswanda Imas Masriah Imas Masriah Pina Budiarti Pratiwi Siti Mahmudha Sulwiyatul Kamariyah Sani