摘要:
Disclosed is a method for producing an optically active ester by highly selectively esterifying one enantiomer of a racemic carboxylic acid, while producing an optically active carboxylic acid which is the other enantiomer. An optically active ester is produced while producing an optically active carboxylic acid at the same time by reacting a racemic carboxylic acid with a specific alcohol or phenol derivative in the presence of benzoic anhydride or a derivative thereof and a catalyst such as tetramisole or benzotetramisole, thereby selectively esterifying one enantiomer of the racemic carboxylic acid.
摘要:
The invention provides a boil cooling method, a boil cooling apparatus, a flow channel structure, and applied products thereof, by which noise and vibration attending on cooling by microbubble emission boiling can be effectively reduced, and efficient boil cooling can be realized. A subcooled cooling liquid is caused to flow through a flow channel structure, which is formed by using a surface of an object 10 to be cooled as a surface 10A to be cooled and the surface 10A to be cooled as a tubular wall and has a tubular flow channel 16, through which the subcooled cooling liquid is caused to flow, and a structure that a group of rigid needles N1, N2, ·· Ni ·· is protruded within the tubular flow channel 16 from the tubular wall of the tubular flow channel, thereby conducting cooling by microbubble emission boiling.
摘要:
A surface of a base material which has a substance for detecting a material to be analyzed or a material to be analyzed being fixed thereon and have been formed by the treatment with a fluid containing a non-crosslinked polymer on the basis of a polyethylene glycol chain segment carried out simultaneously with or after the fixation of said substance or the material to be analyzed. The above surface allows the significant inhibition of the non-specific adsorption of a trashy protein and the like having been co-present in a measured sample.
摘要:
A method that manufacturers an optically active carboxylic acid ester at high yield and high enantioselectivity is provided. An optically active carboxylic acid ester is manufactured at high yield and high enantioselectivity by reacting a racemic carboxylic acid and a specific alcohol or phenol derivatives in a polar solvent having a dipole moment of 3.0 or higher in the presence of an acid anhydride and an asymmetric catalyst, esterifying one enantiomer of the racemic carboxylic acid at high selectivity, and increasing the amount of esterified carboxylic acid by racemizing the optically active carboxylic acid which is the other enantiomer not used in esterification.