在Pak Choi中挥发性芳香化合物的表征
Jinyan Li1, Wenfeng Zheng1, Weina Zhou1
1Department of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning Province, China.
Food chemistry: X
|September 16, 2024
概括
这项研究确定了两种Pak Choi (Brassica rapa) 品种的独特香味特征,即青和华. 发现类代谢物是它们独特风味的关键贡献者.
科学领域:
- 农业科学 农业科学
- 食品化学 食品化学
- 植物科学 植物科学
背景情况:
- 香味显著影响了帕克 (Brassica rapa L. ssp.) 的风味感知和评价. 华人种 var. 华人种. 马基诺 (马基诺) 的意思.
- 特定的Pak Choi品种,青 (XQC) 和华 (XHJ),具有独特的香味特征,需要详细的化学分析.
- 了解这些香味特征对于品种区分和质量评估至关重要.
研究的目的:
- 确定和比较三种Pak Choi品种的香味特征:XQC,XHJ和一个非芳香的对照品种 (苏州市).
- 确定负责XQC和XHJ独特香味特性的关键挥发性代谢物.
- 为了研究类代谢物在整体芳香成分中的作用.
主要方法:
- 利用气相色谱-质谱法 (GC-MS) 来分离和识别挥发性化合物.
- 使用相对气味活性值 (rOAV) 来评估单个芳香成分对整体气味的贡献.
- 分析了三种Pak Choi品种,包括两个芳香品种 (XQC,XHJ) 和一个非芳香品种 (CK).
主要成果:
- 在分析的Pak Choi品种中,共检测到15个类别的716种挥发性代谢物.
- 类代谢物构成了主要的挥发性化合物组,在样本中占主导地位的类中存在差异.
- XQC展示了53种香味成分,rOAV>1,有助于米般的香味,而XHJ有54种这样的成分,与鱼味相关.
结论:
- 这项研究成功地阐明了XQC和XHJ pak choi品种独特的香味化学特征.
- 类代谢物在定义这些Pak Choi品种的特征香味方面发挥着重要作用.
- 这些发现提供了关于Pak Choi风味和香味的化学基础的宝贵见解,有助于育种和质量控制.
相关概念视频
Volatilization
374
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
374
Aromatic Compounds: Overview
10.4K
In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history of organic chemistry, many benzene derivatives were isolated from the pleasant odor oils of the plants. For example, vanillin was isolated from the oil of vanilla, methyl salicylate from the oil of wintergreen, and cinnamaldehyde from the oil of cinnamon. They all had a pleasant odor; hence the name aromatic was given.
In 1825, Faraday...
In 1825, Faraday...
10.4K
NMR Spectroscopy of Aromatic Compounds
4.6K
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range.
4.6K
Structures of Aldehydes and Ketones
8.5K
Vanillin—a flavoring agent in vanilla, cinnamaldehyde—a molecule responsible for the distinct smell of cinnamon, and acetone—a strong-smelling ingredient in nail polish removers, all belong to a class of carbonyl compounds called aldehydes and ketones (Figure 1). Although both aldehydes and ketones contain the characteristic carbonyl (C=O) bond, their chemical structures vary with respect to the groups directly attached to the carbonyl carbon.
In aldehydes (Figures 1a and 1b),...
In aldehydes (Figures 1a and 1b),...
8.5K
Organic Compounds
51.3K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
51.3K
Extraction: Effects of pH
451
Consider a neutral form of an amine, B, with a partition coefficient, K, in a liquid mixture containing organic and aqueous phases. The pH of the aqueous phase affects the charge on acidic and basic solutes, and the charged form is usually more soluble in the aqueous phase. Suppose the conjugate acid form of the amine is soluble only in the aqueous phase while the base form is soluble in both phases. Then the distribution coefficient, D, can be given as the ratio of amine concentration in the...
451


