Pectin from durian peel (Durio zibethinus Murr.) - a novel reducing and stabilizing agent: Physicochemical properties, green synthesis of silver nanoparticles and antimicrobial properties

IF 6.5 Q1 CHEMISTRY, APPLIED Carbohydrate Polymer Technologies and Applications Pub Date : 2024-12-01 Epub Date: 2024-11-29 DOI:10.1016/j.carpta.2024.100623
Phuong Anh Thi Nguyen , Thanh Thuy Thi Nguyen , Dang Khoa Nguyen Vo
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Abstract

Sustainable agricultural development has become a long-term trend to protect environmental health, human well-being and enhance economic profitability all over the world, especially in developing countries like Vietnam. Thus, in order to elevate the value of Durio zibethinus Murr., this study aims to extract pectin from the peels waste and initially investigate its reduced capacity in the green approach for silver nanoparticle synthesis. The extraction yield was 11.21 % for crude pectin and 6.89 % after purification. Physiochemical characterization showed that the acidic isolated pectin was low methoxy pectin with 40 % DE and has a viscosity-molecular weight of 25.5 kDa with 60 % AUA. Spherical and stable pectin-based Ag nanoparticles prepared in alkaline medium exhibit a hydrodynamic diameter approximately 100 nm and a negative potential around -50 mV. In particular, green synthesized Ag nanoparticles with negative charge outer coating demonstrated their antibacterial ability against both gram (-) Escherichia coli and gram (+) Staphylococcus aureus at the MIC of 61.8 ppm. In consequence, durian pectin probably serves as a novel reducing and stabilizing agent for size-controlled nanoparticles synthesis.

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榴莲果皮(Durio zibethinus Murr.) -一种新型还原剂和稳定剂:物理化学性质,绿色合成纳米银和抗菌性质
农业可持续发展已成为世界各国,特别是越南等发展中国家保护环境健康、人类福祉和提高经济效益的长期趋势。因此,为了提升Durio zibethinus Murr的价值。本研究旨在从果皮废料中提取果胶,并初步研究其在绿色方法中合成纳米银颗粒的能力。粗果胶的提取率为11.21%,纯化后的提取率为6.89%。理化表征表明,酸性分离果胶为低甲氧基果胶,DE为40%,粘分子量为25.5 kDa, AUA为60%。在碱性介质中制备的球状稳定的果胶基银纳米颗粒,其流体力学直径约为100 nm,负电位约为-50 mV。特别是在MIC为61.8 ppm时,带负电荷外包的绿色合成银纳米粒子对革兰氏(-)大肠杆菌和革兰氏(+)金黄色葡萄球菌均表现出抗菌能力。因此,榴莲果胶可能作为一种新型的还原剂和稳定剂,用于粒径控制纳米颗粒的合成。
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