RESUMO
Objective:To explore the mechanism and influences of population aging on medical insurance expenditure in China and put forward the improvement strategy of medical insurance.Methods:It constructed the structural equation model based on some related indicators in 31 provinces and cities of China from 2005 to 2015.Results:The indirect effect of population aging on medical insurance fund was higher than the direct effect.Medical expenses had the most influence degree of medical insurance fund.There were action and reaction between per capita GDP and medical insurance fund,while the reaction was much stronger.Conclusion:The government should construct a multi-level mode of disease prevention and control,further increase the government fiscal subsidies for medical insurance,improve the care coverage,and improve the financing mechanisms to develop the sustainable operation of medical insurance fund in China.
RESUMO
<p><b>OBJECTIVE</b>To study the chemical constituents of the twigs of Morus atropurpurea.</p><p><b>METHOD</b>The compounds of the EtOAc fraction were isolated and purified by column chromatography on silica gel, polyamide, Sephadex LH -20, and their structures were elucidated on the basis of spectroscopic evidence (MS, NMR).</p><p><b>RESULT</b>Eleven compounds were identified as mulberrin (1), cyclomulberrin (2), morusin (3), cyclomorusin (4), 2', 4',4, 2"-tetrahydroxy-3'-{3"-methylbut-3"-enyl-}-chalcone (5), mulberrofran G (6), scopoletin (7), moruchalcone A (8), kaempferol (9), ursolic acid (10), beta-daucosterol (11).</p><p><b>CONCLUSION</b>Except compounds 9 and 11, all the other compounds were obtained from M. atropurpurea for the first time.</p>