Department of Chemical Sciences and Technology, via del Cotonificio 108, University of Udine, 33100 Udine, Italy.
Food Microbiol. 2011 May;28(3):384-91. doi: 10.1016/j.fm.2010.09.011. Epub 2010 Oct 1.
A simplified growth/no growth (G/NG) model, conceptually derived from the Gamma model and making direct and explicit use of growth limits of bacteria through a normalization constant (η), was proposed. The η value, which quantifies the product of the cardinal optimal distances for growth probability, is a species-independent constant. This is of importance when experimental data is missing or insufficient. The simplified G/NG model was developed including the effect of temperature, pH and water activity, and was expanded incorporating the preservative effects. As a practical application, the model was investigated for its ability to describe published data. The successful validation of the simplified G/NG model is discussed in regard to its potential applicability as a first estimate method for the development of safe food products.
提出了一种简化的生长/不生长（G/NG）模型，该模型从伽马模型概念上推导而来，通过归一化常数（η）直接和明确地利用了细菌的生长限制。η 值量化了生长概率的基数最优距离的乘积，是一个与物种无关的常数。当实验数据缺失或不足时，这一点很重要。简化的 G/NG 模型包括了温度、pH 值和水活度的影响，并扩展了包含了防腐剂的效果。作为实际应用，研究了该模型描述已发表数据的能力。讨论了简化 G/NG 模型的成功验证，及其作为安全食品开发的初步估计方法的潜在适用性。
