解码二元反应模型产物 (新素-葡萄糖添加物):从识别到苦味掩盖机制
Yun Niu1, Zhuqing Zhou1, Bin Zhou1
1College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
Food chemistry
|November 16, 2025
概括
研究人员发现了在咖啡烤过程中形成的新型奎尔-葡萄糖添加物. 一种添加剂,HF-3,通过与咖啡因相互作用,掩盖咖啡的苦味,增强咖啡的风味.
科学领域:
- 食品化学 食品化学
- 味道科学 味道科学
- 梅拉德反应研究 梅拉德反应研究
背景情况:
- 夸斯是一种黄类化合物,存在于咖啡豆中.
- 咖啡涉到复杂的化学反应,产生风味化合物.
- 烤过程中奎尔塞丁衍生物的形成和感觉影响尚不清楚.
研究的目的:
- 为了识别咖啡烤过程中形成的新型奎尔胺衍生物.
- 为了描述这些衍生品的风味特性.
- 调查它们对咖啡的感觉特征,特别是苦味的贡献.
主要方法:
- 利用奎尔素和葡萄糖的二元反应模型来模拟高温烤条件.
- 采用细致的分析和净化技术来分离反应产品.
- 使用分析方法检测和量化烤咖啡豆中确定的添加物.
- 进行了感官评估,以评估苦味和度值.
- 进行计算机模拟以阐明负责调味的分子相互作用.
主要成果:
- 成功合成和分离了四种以前未报告的瑞-葡萄糖添加物.
- 在各种预处理 (0.1350.423μg/mL) 的烤咖啡豆中鉴定出一种添加物HF-3.
- 在HF-3中,苦度 (355μmol/L) 和度 (328μmol/L) 的值较高.
- HF-3显著掩盖了素 (45.7%) 和咖啡因 (42.1%) 的苦味.
- 计算模拟证实HF-3与咖啡因在结合部位上竞争,解释了苦味掩饰.
结论:
- 奎尔赛丁可以在咖啡烤过程中与葡萄糖发生反应,形成新的添加物.
- 鉴定到的添加物HF-3具有独特的调味特性,特别是掩盖苦味.
- HF-3有助于烤咖啡复杂的风味特征,并提供了风味修改的潜力.
相关概念视频
The Physiology of Taste
7.1K
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the...
7.1K
C–C Bond Cleavage: Retro-Aldol Reaction
7.4K
The reverse of the aldol addition reaction is called the retro-aldol reaction. Here, the carbon–carbon bond in the aldol product is cleaved under acidic or basic conditions to form two molecules of carbonyl compounds. The mechanism of the reaction consists of three steps.
In the first step, as depicted in Figure 1, the base deprotonates the β-hydroxy ketone at the hydroxyl group to form an alkoxide ion.
In the first step, as depicted in Figure 1, the base deprotonates the β-hydroxy ketone at the hydroxyl group to form an alkoxide ion.
7.4K
Gustation
51.8K
Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
51.8K
Reaction Quotient
52.7K
The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n B ⇌ x C + y D, the reaction quotient is derived directly from the stoichiometry of the balanced equation as
52.7K
SN2 Reaction: Stereochemistry
11.5K
In an SN2 reaction, the nucleophilic attack on the substrate and departure of the leaving group occurs simultaneously through a transition state. As the nucleophile approaches the substrate from the back-side, the configuration of the substrate carbon changes from tetrahedral to trigonal bipyramidal and then back to tetrahedral, leading to an inversion in the configuration of the product.
If the substrate is an achiral molecule at the α-carbon, the inversion of configuration is not...
If the substrate is an achiral molecule at the α-carbon, the inversion of configuration is not...
11.5K
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
4.9K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is activated by...
The carbonyl center is activated by...
4.9K


