Triethanolammonium salts of biologically active carboxylic acids
作者:Yu. A. Kondratenko、T. A. Kochina、V. S. Fundamensky、Yu. G. Vlasov
DOI:10.1134/s1070363215120075
日期:2015.12
Triethanolammonium salts (protatranes) of biologically active carboxylic acids (nicotinic, cinnamic, benzoic, salicylic, oxalic, malonic, succinic, malic, citric) were synthesized in yields exceeding 90%. The structure of the synthesized compounds was studied by IR spectroscopy and X-ray diffraction analysis.
Production process of cross-linked polyaspartic acid resin
申请人:MITSUI CHEMICALS, INC.
公开号:EP0866084A2
公开(公告)日:1998-09-23
A process is disclosed for producing with good productivity a cross-linked polyaspartic acid resin having biodegradability and high water absorbency. The process features inclusion of one of the following steps: (a) a polysuccinimide, which has been brought into a dispersed state by a dispersant, and a cross-linking agent are reacted to produce the cross-linked polyaspartic acid resin; (b) imide rings of a cross-linked polysuccinimide are subjected to a hydrolysis reaction while controlling a swelling degree of a resulting gel, whereby the cross-linked polyaspartic acid resin is produced; and (c) a gel of a cross-linked polysuccinimide, which has been obtained by reacting a cross-linking agent to a solution of a polysuccinimide in an organic solvent, is disintegrated to subject imide rings of the cross-linked polysuccinimide to a hydrolysis reaction, so that the cross-linked polyaspartic acid resin is produced. The process may also include one or both of the following steps as needed: (d) a gel of the cross-linked polyaspartic acid resin is washed with water and/or a water-miscible organic solvent; and (e) the polysuccinimide is produced using a basic amino acid as a cross-linking agent.
Biological Activity of Protic Ionic Liquids Based on Tris(2-hydroxyethyl)ammonium Salts and the Crystal Structure of Tris(2-hydroxyethyl)ammonium Malate
作者:Yu. A. Kondratenko、V. V. Gurzhii、G. G. Panova、L. M. Anikina、O. R. Udalova、V. I. Krutikov、V. L. Ugolkov、T. A. Kochina
DOI:10.1134/s0036023620090089
日期:2020.9
The antimicrobial and growth-stimulating activities of nine protic ionic liquids (PILs)-tris(2-hydroxyethyl)ammonium salts (protatranes) of cinnamic, benzoic, salicylic, oxalic, malonic, succinic, malic and citric acids-were investigated for the first time. It was found that tris(2-hydroxyethyl)ammonium salts of cinnamic, benzoic and malonic acids have a positive impact on seeds germination and growth characteristics of garden cress (Lepidium sativumL.) sprouts. All the investigated PILs exhibited selective activity againstStaphylococcus aureusbacteria.PILs based on tris(2-hydroxyethyl)ammonium malate with the melting point of 41 degrees C were isolated as crystals to perform a comparative study of the crystal structure by single-crystal X-ray diffraction. In contrast to cations in tris(2-hydroxyethyl)ammonium succinate, cations in malate have a tricyclicendoconformation that is most typical of tris(2-hydroxyethyl)ammonium salts.