Wu Xinyu, Yan Haiyang, Cao Yue, Yuan Yuan
College of Food Science and Engineering, Jilin University, Changchun, China.
Food Chem X. 2024 Nov 16;24:102007. doi: 10.1016/j.fochx.2024.102007. eCollection 2024 Dec 30.
Acrylamide forms through the reaction between reducing sugars and asparagine in the thermal processing of food. Detection measures like LC-MS, HPLC are time-consuming and costly, which inspired us to use back propagation-artificial neural networks (BP-ANN) based on a genetic algorithm to establish an acrylamide prediction model in fried dough twist. The effects of frying time and temperature on acrylamide contents, as well as the color difference and acid value at different time and temperature were determined. Acrylamide content was found significantly correlated with temperature ( < 0.01) and was correlated with acid value and color difference ( < 0.05). Thus, temperature, acid value, and the color difference were set as input layers, and acrylamide content was set as an output layer to establish a BP-ANN network prediction model. The weight and threshold values in the BP-ANN network prediction model were optimized with a multi-population genetic algorithm and the test data were set to obtain an optimized BP neural network predicting model. The results showed that the Levenberg-Marquardt back-propagation training algorithm of the BP-ANN model with 5 hidden layer neurons and 0.005 learning rate was the best predictive performance, which the correlation coefficients () of test and validation were 0.9640 and 0.8999, suggesting a good fitting and strong approximation ability. The BP-ANN model is expected to accurately predict the content of acrylamide in fried dough twist.
丙烯酰胺是在食品热加工过程中由还原糖和天冬酰胺反应形成的。诸如液相色谱 - 质谱联用仪(LC - MS)、高效液相色谱(HPLC)等检测方法既耗时又昂贵,这促使我们使用基于遗传算法的反向传播人工神经网络(BP - ANN)来建立油条中丙烯酰胺的预测模型。测定了油炸时间和温度对丙烯酰胺含量的影响,以及不同时间和温度下的色差和酸值。发现丙烯酰胺含量与温度显著相关(<0.01),并且与酸值和色差相关(<0.05)。因此,将温度、酸值和色差设置为输入层,将丙烯酰胺含量设置为输出层,以建立BP - ANN网络预测模型。使用多种群遗传算法对BP - ANN网络预测模型中的权重和阈值进行优化,并设置测试数据以获得优化后的BP神经网络预测模型。结果表明,具有5个隐藏层神经元和0.005学习率的BP - ANN模型的Levenberg - Marquardt反向传播训练算法具有最佳预测性能,测试和验证的相关系数()分别为0.9640和0.8999,表明拟合良好且具有很强的逼近能力。BP - ANN模型有望准确预测油条中丙烯酰胺的含量。