DL-Methionine
Optical Activity of DL-Methionine
As a racemic mixture, DL-methionine isoptically inactive, with a specific optical rotation of[α]_D^25=0°(measured in 5% aqueous solution). This is because the dextrorotatory effect of L-methionine ([α]_D^25=+21.5°) and the levorotatory effect of D-methionine ([α]_D^25=-21.5°) cancel each other out exactly in the equimolar mixture.
The optical activity of DL-methionine can be restored by chiral resolution: if DL-methionine is separated into pure L-methionine and D-methionine by methods such as fractional crystallization or chiral chromatography, the two enantiomers will exhibit opposite optical rotation directions and equal absolute values of specific optical rotation.
Другие товары поставщика
|
|
Purchase price |
As an amphoteric compound, L-threonine can buffer pH changes in acidic or alkaline food systems: Used in beverages (e.g., sports drinks, fruit juic... |
|
|
DL-Alanine |
DL-Alanine is thermally stable under normal conditions but is sensitive to prolonged high temperatures, which may cause partial decomposition (e.g.... |
|
|
Glycine |
Glycine has three reaction centers: amino group, carboxyl group, and methylene group. It has typical and diverse chemical properties.1. Ampholytic ... |
|
|
Sucralose |
Sucralose is a white powder product that readily dissolves in water, ethanol, and methanol. It is currently the only functional sweetener produced ... |
|
|
L-Threonine |
While not a primary preservative, L-threonine can: Improve the stability of proteins and enzymes in processed foods, reducing degradation. Act as a... |
Все товары поставщика
Похожие товары
