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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Nutrition Science
Jauhari Jauhari
Iskandar Muda University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Veterinary

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Analysis of the Combined Effects of Hydrodistillation and Ultrasound Methods on the Yield and Quality of Eucalyptus Leaf Oil Novi Mailidarni; Jauhari Jauhari
Journal of Nutrition Science Vol 5, No 2 (2024): November, 2024
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study investigates the effects of combining hydrodistillation and ultrasound methods on the yield and quality of eucalyptus leaf oil. The study uses factorial randomized block design (RBD) with two replicates, focusing on the treatment variables of ultrasound exposure time and hydrodistillation temperature and pressure. The ultrasound exposure time is divided into three categories: 5-10 minutes, 15-20 minutes, and 25-30 minutes, while the hydrodistillation temperatures are set at 50-60 °C, 70-80 °C, and 90-100 °C. The essential oil yield and quality were analyzed using ANOVA and Least Significant Difference (LSD) tests. Results indicate that the combination of hydrodistillation at 70-80 °C with ultrasound exposure for 15-20 minutes significantly increases oil yield and enhances the chemical composition of eucalyptus oil, particularly its cineole content. This method shows potential as an alternative to traditional extraction techniques, offering improvements in both efficiency and product quality. keywords:  Cineole, Eucalyptus oil, Extraction yield, Hydrodistillation, Ultrasound
Effect Of Combination of Wheat Flour with Yellow Pumpkin Paste and Yeast Concentration on The Quality of Yellow Pumpkin Donuts (Cucurbita Moschata) Novi Mailidarni; Jauhari Jauhari
Journal of Nutrition Science Vol 4, No 2 (2023): November, 2023
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jns.v4i2.7814

Abstract

The aim of this research was to determine the effect of the ratio of pumpkin paste and yeast concentration on donuts. The variables used include the effect of the ratio of wheat flour to pumpkin pasta and the concentration of yeast on the quality of pumpkin donuts, the ratio of 40% pumpkin paste: 60% wheat flour, 50% pumpkin pasta: 50% wheat flour, 60% pumpkin pasta: 40% and pumpkin paste 1%, 2% and 3% respectively. Meanwhile, the parameters explained are water content, ash content, and organoleptic tests (color, taste, aroma and texture). The research data were processed using a Factorial Completely Randomized Design (CRD) with 2 replications, data analysis using ANOVA and the Least Significant Difference Follow-up Test (BNT).The best treatment in this study was the T2L2 treatment and the SNI 01-2000 donut quality requirements were 50% pumpkin pasta donuts with a wheat flour ratio of 50: 50% (T2) and a yeast concentration of 2% (L2) with a water content value of 20.71%. , ash content value 0.91%, organoleptic test color value 3.37%, taste value 3.83%, aroma value 3.37% and texture value 3.54%.
Growth Response of Cocoa Seedlings (Theobroma cacao L.) to Concentration and Application Interval of Forest Organic Fertilizer Novi Mailidarni; Jauhari Jauhari
Jurnal Penelitian Pendidikan IPA Vol 12 No 7 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i7.15277

Abstract

Vegetation plays an essential role in regulating soil fertility through nutrient cycling, organic matter accumulation, and interactions with soil microorganisms. This study aimed to evaluate the chemical characteristics and soil fertility status under vegetation dominated by Mimosa invisa L., Crotalaria anagyroides L., and Imperata cylindrica L. Beauv. in Baitussalam District, Aceh Besar Regency, Indonesia. Soil samples were collected from the 0–20 cm layer using a non-factorial randomized block design with five replications. Soil chemical analyses included pH, organic carbon, total nitrogen, available phosphorus, exchangeable potassium, calcium, magnesium, sodium, cation exchange capacity (CEC), exchangeable sodium percentage (ESP), and exchangeable hydrogen. Data were analyzed using analysis of variance (ANOVA), followed by the Least Significant Difference (LSD) test at the 5% significance level. The results showed that vegetation type significantly affected available phosphorus and exchangeable calcium but had no significant effects on soil pH, total nitrogen, exchangeable potassium, magnesium, sodium, CEC, ESP, or exchangeable hydrogen. Soils under Mimosa invisa generally exhibited higher soil pH, organic carbon, total nitrogen, CEC, and exchangeable calcium than those under Crotalaria anagyroides and Imperata cylindrica. High exchangeable sodium and ESP values across all vegetation types indicated persistent effects of seawater intrusion following the 2004 Indian Ocean tsunami. These findings demonstrate that vegetation type influences nutrient cycling and selected soil chemical properties, with leguminous vegetation showing greater potential to improve soil fertility. The study provides valuable information for developing sustainable soil management and ecological restoration strategies in tropical coastal ecosystems.
Co-Authors Novi Mailidarni Novi Mailidarni