crystallization center meaning in English

结晶中心

Through the analyzing the macro - structure to micro - structure , the author considers that retarding mechanism of citric acid is that citric acid and ca in the gypsum form the complexant ion , and hinder the crystallization center of dihydrate crystal bigger ; that of sodium tripolyphosphate is that it combined with ca , hinders the dissolve of hemihydrate . formation and growth of crystallization center ; that of bone glue is the glue - protection and chemical absorption action of active group , which also retards the formation and growth of crystallization center
通过宏观到微观的分析，笔者认为，柠檬酸的缓凝作用的原因主要在于柠檬酸与钙形成络合离子，影响了二水石膏晶体的晶核长大过程；多聚磷酸钠与钙形成某种复盐，对于石膏晶体的溶解、成核和长大过程均有强烈的阻碍影响；骨胶则在于胶体对半水石膏的包裹和活性基团的化学吸附，使二水石膏晶体的成核和长大困难。