Temperature-resilient and sustainable Mn-MOF oxidase-like nanozyme (UoZ-4) for total antioxidant capacity sensing in some citrus fruits: Breaking the temperature barrier

被引:62
作者
Ameen, Sameera Sh. Mohammed [1 ]
Omer, Khalid M. [2 ]
机构
[1] Univ Zakho, Coll Sci, Dept Chem, Zakho, Kurdistan Regio, Iraq
[2] Univ Sulaimani, Coll Sci, Dept Chem, Qliasan St, Sulaymaniyah 46002, Kurdistan regio, Iraq
关键词
Manganese metal organic framework; Total antioxidants; Oxidase-like activity; Cold/hot adapted nanozyme; Smartphone analysis; Magnetic nanozyme; METAL-ORGANIC FRAMEWORKS; NANOPARTICLES; FABRICATION;
D O I
10.1016/j.foodchem.2024.139170
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Current nanozyme applications rely heavily on peroxidase-like nanozymes and are limited to a specific temperature range, despite notable advancements in nanozyme development. In this work, we designed novel Mnbased metal organic frameworks (UoZ-4), with excellent oxidase mimic activity towards common substrates. UoZ-4 showed excellent oxidase-like activity (with Km 0.072 mM) in a wide range of temperature, from 10 degrees C to 100 degrees C with almost no activity loss, making it a very strong candidate for psychrophilic and thermophilic applications. Ascorbic acid, cysteine, and glutathione could quench the appearance of the blue color of oxTMB, led us to design a visual -based sensing platform for detection of total antioxidant capacity (TAC) in cold, mild and hot conditions. The visual mode successfully assessed TAC in citrus fruits with satisfactory recovery and precisions. Cold/hot adapted and magnetic property will broaden the horizon of nanozyme applications and breaks the notion of the temperature limitation of enzymes.
引用
收藏
页数:9
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