期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 1, 页码 199-206出版社
AMER CHEMICAL SOC
DOI: 10.1021/am3024788
关键词
adsorption; lignin; proteins; soy glycinin; beta-conglycinin; quartz crystal microbalance
资金
- United Soybean Board (USB) [2490, 2466]
Lignins are used often in formulations involving proteins but little is known about the surface interactions between these important biomacromolecules. In this work, we investigate the interactions at the solid-liquid interface of lignin with the two main proteins in soy, glycinin (11S) and beta-conglycinin (7S). The extent of adsorption of 11S and 7S onto lignin films and the degree of hydration of the interfacial layers is quantified via Quartz crystal microgravimetry (QCM) and surface plasmon resonance (SPR). Solution ionic strength and protein denaturation (2-mercaptoethanol and urea) critically affect the adsorption process as protein molecules undergo conformational changes and their hydrophobic or hydrophilic amino acid residues interact with the surrounding medium. In general, the adsorption of the undenatured proteins onto lignin is more extensive compared to that of the denatured biomolecules and a large amount of water is coupled to the adsorbed molecules. The reduction in water contact angle after protein adsorption (by similar to 40 degrees and 35 degrees for undenatured 11S and 7S, respectively) is explained by strong nonspecific interactions between soy proteins and lignin.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据