Characterization and functional properties of chromogenic substances from defatted Antarctic krill powder
文献类型： 外文期刊
作者： Su, Dong 1 ; Li, Shuang 3 ; Ma, Xinyu 1 ; Wang, Xixi 3 ; Miao, Junkui 3 ; Liu, Xiaofang 3 ; Zhang, Yating 1 ; Zhao, Ling 1 ; Leng, Kailiang 2 ; Yu, Yueqin 1 ;
作者机构： 1.Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Ecochem Engn, Qingdao 266042, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Drugs & Bioprod, Qingdao 266237, Peoples R China
3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Polar Fisheries, Minist Agr & Rural Affairs, Qingdao 266071, Peoples R China
4.Univ New South Wales, Cluster Adv Macromol Design & Australian Ctr Nano, Sch Chem Engn, Sydney, NSW 2052, Australia
关键词： Antarctic krill; Chromogenic substances; Melanoidins; Colloidal stability; Angiotensin-converting enzyme (ACE); ACE inhibitory activity
期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.6； 五年影响因子：6.9 ）
ISSN： 0023-6438
年卷期： 2025 年 227 卷
页码：
收录情况： SCI
摘要： Food chromophores are pivotal for their contributions to appearance, flavor, and nutritional functionality. In this study, melanoidin-like compounds were extracted from defatted Antarctic krill powder (AKM), yielding 12.42 f 1.52 g/100 g. AKM exhibited a brownish color, a heterogeneous protein-polyphenol-sugar matrix, and characteristic ultraviolet-visible (UV-Vis) absorption at 420 nm. Ultrafiltration was employed to fractionate AKM into low-molecular-weight (<10 kDa, L-AKM) and high-molecular-weight (>10 kDa, H-AKM) fractions, revealing their distinct functionalities. H-AKM demonstrated superior colloidal stability (c-potential = -29.43 f 0.33 mV) and interfacial activity, stabilizing emulsions and foams (84.17 f 13.77% stability) through robust film formation. In contrast, L-AKM, with a number-average molecular weight (Mn) of 2095 f 68 Da, exhibited potent angiotensin-converting enzyme (ACE) inhibitory activity (IC50 = 0.43 f 0.04 mg/mL). The retention of flavor attributes across fractions, coupled with AKM's multifunctionality, positions it as a sustainable, natural ingredient for food and nutraceutical applications.
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