ABSTRACT
In order to explore the relationship between dietary pattern and C-reactive protein (CRP) in Xiamen residents, 2 904 subjects from 3 districts of Xiamen City were selected by a multi-stage stratified random sampling method. The food frequency questionnaire was used for dietary survey and serum CRP concentration was determined simultaneously. The dietary model was established by factor analysis and the relationship between different dietary patterns and serum CRP concentration was analyzed. Five dietary patterns were obtained by the factor analysis. After the adjustment of gender, age, occupation, education, marriage status, income, smoking, drinking and body mass index, the healthy dietary pattern was negative associated with the serum CRP concentration [OR(95%CI):0.62(0.42-0.90)]. The Serum CRP concentration of residents with a healthy dietary pattern is lower.
ABSTRACT
In order to separate chiral D-phenylalanine from L-phenylalanine,the enzyme catalytic method by papain and immobilized papain were used in this investigation.It indicated that the yield rate of N-acetyl-DL-phenylalanine synthesized from DL-phenylalanine was 88.7%.The ionic strength was the strongest influencing factor in the synthesis of N-acetyl-L-phenylalanylaniline by both papain and immobilized papain on sodium alginate-ehitosan(IPSAC).But the reaction temperature was the strongest influencing factor in the synthesis by immobilized papain on nylon cloth(IPN).The ionic strength and the pH were the important influencing factors in the synthesis.The yield rates of the best synthesis system of N-acetyl-L-phenylalanylaniline by papain,IPSAC,IPN were 61.2%,54.7%,36.3%,respectively.The yield rate of L-phenylalanine from N-acetyl-L-phenylalanylaniline hydrolyzation was 59.2%.The optical purity of the product was 96.6%.The vield rate of D-phenylalanine from N-acetyl-D-phenylalanine hydrolyzation was 61.7%.The optical purity was 95.7%.