基于氨基酸的美拉德反应制备杨梅烟用香料分析及应用

Analysis and Application of Flavor Characteristics of Flavoring for Bayberry Tobacco Prepared Based on Maillard Reaction of Different Amino Acids

  • 摘要: 分别添加不同种类氨基酸(脯氨酸、谷氨酸、甘氨酸)于杨梅浸膏中,进行美拉德反应制备新型卷烟用香料,并利用气相色谱−质谱联用仪(GC-MS)对挥发性成分定性、定量分析,随后进行多元统计分析,识别、分析关键差异香气成分,并运用分子对接技术判断差异香气成分与嗅觉受体结合程度,最后进行卷烟加香、嗅香验证. GC-MS结果表明,不同氨基酸制备的3种香料中GC-MS共鉴定出74种挥发性成分,其中56种为3种香料共有,脯氨酸与杨梅浸膏反应所制备香料的挥发性成分含量最高(2283.82 μg/mL). 依据关键差异香气成分的聚类分析,脯氨酸与杨梅浸膏反应所得的美拉德香料被区分为独立类别. 多元统计分析得出其中17个关键差异挥发性成分,脯氨酸与杨梅浸膏反应所得美拉德香料中香气活度值较高的有肉桂酸乙酯(OAV=583.43)、5-甲基呋喃-2-(5H)-酮(OAV=516.25)、乙基麦芽酚(OAV=501.62)、肉桂酸甲酯(OAV=259.00)、叶醇(OAV=165.50)等为香料赋予果、烘焙、甜香. 分子对接结果表明,12个关键差异香味成分与11种嗅觉受体蛋白的平均结合能在−6.19~ −4.20 kcal·mol−1间,特征香气可以被有效感知. 卷烟加香结果表明,脯氨酸与杨梅浸膏美拉德反应所得香料加香效果最好,在香气、烟气浓度、杂气、丰富性上提升明显,嗅香结果总体香韵以果香、甜香、花香为主,焦香、烘焙香为辅. 相较于谷氨酸、甘氨酸,脯氨酸更适于制备杨梅美拉德烟用香料. 研究结果为开发水果型烟用香料提供理论支持.

     

    Abstract: To develop a novel tobacco flavoring, different amino acids (proline, glutamic acid, and glycine) were added to bayberry extracts to prepare flavorings via the Maillard reaction. Volatile compounds were qualitatively and quantitatively analyzed using gas chromatography-mass spectrometry (GC-MS). Multivariate statistical analysis was conducted to identify and analyze key differential aroma compounds. Molecular docking was used to assess the binding affinity between differential aroma compounds and olfactory receptors. Finally, the flavorings were added to cigarettes and evaluated through olfactory testing. The results showed that 74 volatile compounds were identified by GC-MS in the three flavorings, with 56 compounds common to all. The flavoring produced from proline and bayberry extract showed the highest volatile content (2283.82 μg/mL). Cluster analysis based on key differential aroma compounds grouped the proline-bayberry Maillard flavoring separately. Seventeen key differential volatile compounds were identified. In the proline-bayberry Maillard flavoring, compounds with high odor activity values (OAV) included ethyl cinnamate (OAV=583.43), 5-methyl-2(5H)-furanone (OAV=516.25), ethyl maltol (OAV=501.62), methyl cinnamate (OAV=259.00), and leaf alcohol (OAV=165.50), contributing fruity, roasted, and sweet aromas. In the glycine-bayberry Maillard flavoring, methyl cinnamate (OAV=840.00) had the highest contribution, while in the glutamic acid flavoring, ethyl tiglate (OAV=523.73) was dominant. Molecular docking results showed that 12 key differential aroma compounds had average binding energies with 11 olfactory receptor proteins ranging from −6.19 to −4.20 kcal·mol−1, indicating spontaneous and perceptible binding. Cigarette flavoring tests demonstrated that the proline-bayberry Maillard flavoring provided the best effects, significantly improving aroma, smoke density, off-flavors, and richness. Olfactory evaluation indicated dominant fruity, sweet, and floral notes, with secondary smoky and roasted aromas. Compared to glutamic acid and glycine, proline was more suitable for preparing bayberry Maillard tobacco flavorings. This study provides theoretical support for developing fruit-type tobacco flavorings.

     

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