不同类型的素对葡萄酒中三种基本氨酸的色彩稳定性的共颜色效应:色彩,热力学和分子动力学模拟
Jiaheng Lyu1, Jiming Li2, Wenguang Jiang2
1Yantai Institute of China Agricultural University, Yantai 264670, China.
Food chemistry
|February 22, 2025
概括
聚烯配色剂增强了葡萄酒中安托素颜色的稳定性. 奎尔赛丁-3-O-葡萄糖化物和咖啡酸显示出强烈的效应,奎尔赛丁与马尔维丁-3-O-葡萄糖化物形成最稳定的复合物.
科学领域:
- 食品化学 食品化学
- 葡萄酒学 葡萄酒学 葡萄酒学
- 葡萄酒科学 葡萄酒科学
背景情况:
- 安西是葡萄酒的关键着色剂,但它们的稳定性在老化过程中受到挑战.
- 聚烯配色素可以与氨酸相互作用以改善颜色.
研究的目的:
- 为了研究六种多色素对葡萄酒老化过程中三种单体氨酸的色彩稳定性的影响.
- 阐明共颜色效应背后的机制.
主要方法:
- 对色度,热力学和分子动力学模拟的分析.
- 研究了用马尔维丁-3-O-葡萄糖酸,咖啡酸和其他多与马尔维丁-3-O-葡萄糖酸,马尔维丁-3-O-乙烯基葡萄糖酸和德尔菲尼丁-3-葡萄糖酸的共颜色.
主要成果:
- 奎尔-3-O-葡萄糖化物和咖啡酸显示出显著的共色素效应.
- 与delphinidin-3-glucoside相比,malvidin-3-O-glucoside和malvidin-3-O-acetylglucoside的共颜色变化更为明显. 与delphinidin-3-glucoside相比,malvidin-3-O-glucoside和malvidin-3-acetylglucoside的共颜色变化更为明显.
- 奎尔素与马尔维丁-3-O-葡萄糖化物 (K = 1572.01) 形成了最强的配色素,由键和范德瓦尔斯力驱动.
结论:
- 安东素和共颜料结构影响着共颜料的有效性.
- 由于delphinidin-3-glucoside的基化群造成的固体效应可能会影响复杂的形成.
- 这些发现增强了对葡萄酒颜色稳定性中的配色素-氨酸相互作用的理解.
更多相关视频
14:39Semi-Targeted Ultra-High-Performance Chromatography Coupled to Mass Spectrometry Analysis of Phenolic Metabolites in Plasma of Elderly Adults
Published on: April 22, 2022
3.8K
10:25Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements
Published on: June 28, 2016
10.6K
相关概念视频
Pigmentation
2.3K
The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
2.3K
Epistasis
45.5K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
45.5K
UV–Vis Spectroscopy of Conjugated Systems
6.8K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
One of the factors influencing λmax is the extent...
6.8K
Oxidation of Phenols to Quinones
2.8K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
2.8K
Background and Environment Affect Phenotype
6.4K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.4K
Epistasis Analysis
4.9K
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
4.9K
