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Fiametta Ayu Purwandari
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Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia
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agriTECH
Published by Universitas Gadjah Mada
ISSN : 02160455     EISSN : 25273825     DOI : 10.22146/agritech
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 1,450 Documents
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Valorisation of Lemongrass (Cymbopogon citratus) Leaf By-product as a Source of Essential Oil
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.104141

Abstract

This research aimed to investigate the potential of lemongrass (Cymbopogon citratus) leaf agricultural by-products as a source of essential oil, and evaluate the antioxidant and antibacterial activities. In this context, the material used was subjected to microwave pre-treatment to enhance the yield. Lemongrass leaf was often discarded as an agricultural by-product. The utilization was examined through different drying methods, including fresh, wilted, and dried treatments. Lemongrass leaf was also treated with microwave (+MV) and non-microwave (-MV) pre-treatments. The essential oils were analysed for physicochemical properties. The chemical composition was determined through gas chromatography-mass spectrometry (GC-MS), and the tissue microstructure was observed by SEM. Antioxidant activity was measured with the DPPH (1,1-diphenyl-2-picrylhydrazyl) assay, while MIC and MBC values were assessed using the microdilution method. The results showed that the distillation of dried leaf with microwave pre-treatment provided the highest oil yield of 0.20%. SEM analysis showed that drying and microwave pre-treatment altered the leaf microstructure, enhanced glandular trichomes, and improved extraction efficiency. The physicochemical properties included a bright yellow colour, a fresh citrus aroma, a specific gravity of 0.971 g/mL, a refractive index of 1.486, and a solubility ratio of 1:3 in alcohol. The main components were citral (geranial (44.07–46.81%), neral (35.64 – 36.60%)), geranyl acetate (2.03–5.66%), isogeranial (1.61–2.57%), isoneral (0.96–1.76%), β-pinene (0.16–3.63%). Lemongrass leaf oil exhibited strong antioxidant activity with an IC50 of 61.65 to 84.5 µg/mL, antibacterial activity against E. coli and S. aureus with MIC of 0.3–1.3% and 0.3–1.8%, as well as an identical MBC value of 0.5–2% for both bacteria. This research showed that essential oil extraction increased the value of lemongrass leaf by-products.
Cover Vol. 45 No. 1
agriTECH Vol 45, No 1 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.104478

Abstract

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Development and Characterization of Nano-fertilizer using Pseudo-Ternary Phase Diagram
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.105085

Abstract

This study aims to develop and characterize a nano-fertilizer for foliar application on rock melon (Cucumis melo). The formulation of the nano-fertilizer was based on a ternary phase diagram, which showed the behavior of NPKTE within emulsion components made up of surfactants, oil, and water, with the isotropic region identified as the most stable. In addition, the formulation was prepared using a high-energy emulsification method, consisting of 25.04% Tween 80, 4.36% neem oil, 20.60% water, and 50% NPK-TE. The results showed that the optimized nano-emulsion had a particle size of 92.58 nm, with a polydispersity index of 0.156, a zeta potential of -39.8 mV, a surface tension of 40.67 m -1 , and a viscosity of 100.46 mPa s -1 . Morphological analysis of the optimized nano-fertilizer showed spherical particles, showing good stability. The formulation showed no phase separation during the centrifugation test and maintained stability at 3 different temperatures (4, 25, and 54 °C) with turbidity reduction values of 23.18%, 8.65%, and 42.90%, respectively, over a period of 60 days.
Ultrasound-Assisted Enzymatic Synthesis of Fructose Oleic Ester using Supersaturated Fructose Solution
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.105584

Abstract

Fructose solubility is one of the major challenges inhibiting enzymatic synthesis of fatty acid sugar ester. Therefore, this study aims to define the optimal parameters for manufacturing fructose oleic ester (FOE) utilizing a supersaturated fructose solution coupled with ultrasound technology. Factors such as esterification time, ultrasound power, and substrate flow rate were evaluated. The reaction was carried out by adding the supersaturated fructose solution and oleic acid to the immobilized lipase in the jacketed fluidized bed reactor equipped with an ultrasound. FOE was evaluated based on ester concentration, ester bond, and emulsification properties. The results showed thatesterification activity of lipase was 36.45±9.95 U/g matrix. Fructose concentration in the supersaturated fructose solution was 12.30±2.33 mg/mL. The optimal parameters for synthesizing FOE were defined at 180 Watt and 0.2 mL/min for 180 min of reaction after one time using a series of esterification apparatus. FOE concentration was 85.13±9.56% and the sample with the best conditions had Rf value of 0.2 to ~0.8, wave absorption band for ester group (C=O) at wavenumber ~1712 cm -1 with a new peak (C-O bond) at 1373 cm -1 , emulsion capacity 99.86±0.01%, emulsion stability of 99.29±0.04%, and droplet size of 1.00 µm with non-uniform droplet size distribution (polydispersity index (PDI)=1.00).
Cover Vol. 45 No. 2
agriTECH Vol 45, No 2 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.107222

Abstract

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Cover Vol. 45 No. 3
agriTECH Vol 45, No 3 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.110852

Abstract

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Cover Vol. 45 No. 4
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.113900

Abstract

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Reviewer Volume 45 Tahun 2025
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.113901

Abstract

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Indeks Penulis Volume 45 Tahun 2025
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.113902

Abstract

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Indeks Subjek Volume 45 Tahun 2025
agriTECH Vol 45, No 4 (2025)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.113903

Abstract

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Page 145 of 145 | Total Record : 1450

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