中文名 | DL-茶氨酸 |
英文名 | DL-Theanine |
别名 | DL-茶氨酸 L-茶氨酸CP N-乙基-L-谷氨酰胺 N-乙基-DL-谷氨酰胺 L-茶氨酸(合成+医级提取) 2-氨基-4-(乙基氨基甲酰)丁酸 DL-茶氨酸(R-乙基-DL-谷氨酰胺) |
英文别名 | H-DL-The-OH DL-THEANINE DL-Theanine N-ethylglutamine N-Ethyl-L-glutamine N-Ethyl-DL-glutamine 2-Amino-4-(ethylcarbamoyl)butanoic acid 2-amino-5-(ethylamino)-5-oxopentanoic acid 5-amino-2-(ethylamino)-5-oxopentanoic acid |
CAS | 34271-54-0 |
化学式 | C7H14N2O3 |
分子量 | 174.2 |
InChI | InChI=1/C7H14N2O3/c1-2-9-6(10)4-3-5(8)7(11)12/h5H,2-4,8H2,1H3,(H,9,10)(H,11,12) |
密度 | 1.171±0.06 g/cm3(Predicted) |
熔点 | 200 °C |
沸点 | 430.2±40.0 °C(Predicted) |
闪点 | 214°C |
蒸汽压 | 1.32E-08mmHg at 25°C |
溶解度 | 水 (微溶) |
折射率 | 1.492 |
酸度系数 | 2.24±0.10(Predicted) |
存储条件 | 2-8°C |
外观 | 固体 |
颜色 | White to Off-White |
物化性质 | 性状 茶氨酸是茶叶中特有的游离氨基酸,茶氨酸是谷氨酸γ-乙基酰胺,有甜味。茶氨酸含量因茶的品种、部位而变动。茶氨酸在干茶中占重量的1%-2%。 茶氨酸在化学构造上与脑内活性物质谷酰胺、谷氨酸相似,是茶叶中生津润甜的主要成份。茶氨酸含量约为新茶的1~2%左右,其含量随发酵过程减少。 |
危险品标志 | Xi - 刺激性物品 |
风险术语 | 43 - 与皮肤接触可能致敏。 |
安全术语 | S28 - 不慎与皮肤接触后,立即用大量肥皂水冲洗。 S36/37 - 穿戴适当的防护服和手套。 |
参考资料 展开查看 | 1. [IF=7.514] Xiangyang Guo et al."Contribution of l-theanine to the formation of 2,5-dimethylpyrazine, a key roasted peanutty flavor in Oolong tea during manufacturing processes."Food Chem. 2018 Oct;263:18 2. [IF=7.514] Xiangyang Guo et al."Aroma compositions of large-leaf yellow tea and potential effect of theanine on volatile formation in tea."Food Chem. 2019 May;280:73 3. [IF=5.279] Jie Zhou et al."LC-MS-Based Metabolomics Reveals the Chemical Changes of Polyphenols during High-Temperature Roasting of Large-Leaf Yellow Tea."J Agr Food Chem. 2019;67(19):5405–5412 4. [IF=7.514] Yinyin Liao et al."Visualized analysis of within-tissue spatial distribution of specialized metabolites in tea (Camellia sinensis) using desorption electrospray ionization imaging mass spectrometry."Food Chem. 2019 Sep;292:204 5. [IF=7.514] Huijun Wang et al."Untargeted metabolomics coupled with chemometrics approach for Xinyang Maojian green tea with cultivar, elevation and processing variations."Food Chem. 2021 Aug;352:129359 6. [IF=7.514] Xiangyang Guo et al."Effect of the roasting degree on flavor quality of large-leaf yellow tea."Food Chem. 2021 Jun;347:129016 7. [IF=5.279] Hui Li et al."Relationship between Secondary Metabolism and miRNA for Important Flavor Compounds in Different Tissues of Tea Plant (Camellia sinensis) As Revealed by Genome-Wide miRNA Analysis."J Agr Food Chem. 2021;69(6):2001–2012 8. [IF=4.546] Hui Bai et al."L-Theanine Reduced the Development of Knee Osteoarthritis in Rats via Its Anti-Inflammation and Anti-Matrix Degradation Actions: In Vivo and In Vitro Study."Nutrients. 2020 Jul;12(7):1988 9. [IF=4.196] Zhou Ziwen et al."K solubilizing bacteria (Bacillus) promote theanine synthesis in tea roots (Camellia sinensis) by activating CsTSI activity."Tree Physiol. 2022 Mar;: 10. [IF=4.411] Shuang Mei et al."The Physiology of Postharvest Tea (Camellia sinensis) Leaves, According to Metabolic Phenotypes and Gene Expression Analysis."Molecules. 2022 Jan;27(5):1708 11. [IF=5.396] Chunyin Qin et al."Comparison on the chemical composition, antioxidant, anti-inflammatory, α-amylase and α-glycosidase inhibitory activities of the supernatant and cream from black tea infusion."Food & Function. 2022 Apr;: |
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