Adsorption of nisin on raw montmorillonite

被引：27

作者：

Ibarguren, Carolina ^{[1
,2
,3
]}

Naranjo, Pablo M. ^{[1
]}

Stoetzel, Christian ^{[2
]}

Carina Audisio, M. ^{[1
,4
]}

Sham, Edgardo L. ^{[1
,4
]}

Farfan Torres, E. Monica ^{[1
,5
]}

Mueller, Frank A. ^{[2
]}

机构：

[1] Univ Nacl Salta, Inst Invest Ind Quim, Consejo Nacl Invest Cient & Tecn INIQUI CONICET, Salta, Argentina

[2] Univ Jena, Inst Mat Sci & Technol IMT, D-07743 Jena, Germany

[3] Univ Nacl Salta, Fac Ciencias Salud, Salta, Argentina

[4] Univ Nacl Salta, Fac Ingn, Salta, Argentina

[5] Univ Nacl Salta, Fac Ciencias Exactas, Salta, Argentina

来源：

APPLIED CLAY SCIENCE | 2014年 / 90卷

关键词：

Nisin; Montmorillonite; Peptide/support interaction; Food biopreservative; ANTIMICROBIAL ACTIVITY; GENERAL TREATMENT; BACTERIOCIN; ORGANOCLAYS; CLAYS; PARANITROPHENOL; CLASSIFICATION; LIPOSOMES; SURFACES; ISOTHERM;

D O I：

10.1016/j.clay.2013.12.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The aim of the present work was to develop food-grade materials capable of releasing antimicrobial agents. Montmorillonite (Mt), a raw, abundant inexpensive clay mineral approved as a food additive, was used as support material. The immobilized antimicrobial agent was pure nisin (Danisco, UK). A series of antibacterial compounds were prepared, and the antimicrobial activity of the resultant montmorillonite-nisin (MtNis) immobilized systems was determined against Enterococcus faecium Cl. The characterization of the antimicrobial powders showed evidences of nisin adsorption on by means of a "frustrated intercalation" model with a nisin loading (NL) saturation value close to 0.24 CEC (cation exchange capacity) of Mt. The antibacterial powders with NL above this value completely inhibited E. faecium Cl during 24 h of contact These results are encouraging for the development of nisin-based bioprotectors immobilized on raw Mt. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：88 / 95

页数：8

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