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All Journal Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Jurnal Penelitian Pendidikan Indonesia Advance Sustainable Science, Engineering and Technology (ASSET)
Zulfanita
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Chemistry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Social Sciences Other

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Journal : advance sustainable science engineering and technology asset

 1 
The Effects of Extraction Temperature on the Physicochemical Properties of Mangrove-Derived Glucomannan (Bruguiera gymnorhiza) Wibawanti, Jeki; Zulfanita; Norhaslinda Arun; Anang Mohamad Legowo; Sri Mulyani; Sapto Pamungkas
Advance Sustainable Science Engineering and Technology Vol. 6 No. 4 (2024): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i4.1026

Abstract

This study investigates the impact of different extraction temperatures on the physicochemical properties of glucomannan derived from mangrove fruits (Bruguiera gymnorhiza). Various extraction temperatures ranging from 45°C to 85°C were utilized. Significant differences (p < 0.05) were observed in solubility (58.41% ± 2.45), total reducing sugar content (0.39% ± 0.09), yield (35.13 ± 2.95), and L* color value (71.97 ± 1.53), while no significant differences (p > 0.05) were found in a* and b* color values. These findings have implications for expanding the applications of Bruguiera and advancing research on Bruguiera glucomannan. Scanning electron microscopy (SEM) analysis revealed an increase in the cross-linking density of glucomannan molecules.
Optimization of Mangrove Glucomannan Addition to Improve Physicochemical Properties of Kefir Jeki Mediantari Wahyu Wibawanti; Zulfanita; Dita Yuzianah; Harisun Binti Ya’acob; Anang Mohamad Legowo; Setya Budi Muhammad Abduh; Sri Mulyani
Advance Sustainable Science Engineering and Technology Vol. 8 No. 2 (2026): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i2.2756

Abstract

Kefir is widely recognized as a functional fermented dairy product. However, its physicochemical stability, particularly pH, acidity, and syneresis, remains a challenge during processing and storage. The addition of functional polysaccharides, such as mangrove-derived glucomannan, has been proposed to improve kefir quality. This study aimed to investigate the effect of mangrove-derived glucomannan on the physicochemical properties of kefir. A Completely Randomized Design with different concentrations of mangrove glucomannan (0, 2, 4, 6, and 8% (v/v)) was applied, with four replications. The results showed that increasing glucomannan had a significant effect (P < 0.05) on total bacteria, pH, and titratable acidity. Mangrove-derived glucomannan significantly enhanced total bacterial counts in goat milk kefir (p < 0.05), increasing from 6.09 Log CFU/mL in the control to 7.45-7.80 Log CFU/mL at 2-8% concentrations. The treatments decreased pH from 3.66 (0%) to 3.35 (8%) (P < 0.05), while titratable acidity increased from 0.70% (0%) to 0.83-0.85% in the treatment groups (P < 0.05), confirming enhanced fermentation activity. Syneresis decreased at 2% glucomannan (0.93%) but increased slightly at higher concentrations, reaching 1.03% at 8% (P > 0.05). These findings indicate that glucomannan modulates kefir fermentation, as reflected in lower pH and higher acidity values. 
Co-Authors Anang M Legowo Dita Yuzianah Dita Yuzianah Eko Harianto, Eko Faruq Iskandar Harisun Binti Ya’acob Isna Windani Maryam, Isnaeni Nor Hidayatun Abdul Razak Norhaslinda Arun Rinawidiastuti Roisu Eny Mudawaroch Sapto Pamungkas Setya Budi Muhammad Abduh, Setya Budi Muhammad Silitonga, Yusnita Wahyuni Sri Mulyani Wibawanti, Jeki Wibawanti, Jeki Mediantari Wahyu