Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has at...Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has attracted remarkable attention to explore evolution of the earth and obtain age information of various geological processes. Matrix effect related studies are especially important during in-situ U- Pb dating based on Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry （LA-MC- ICPMS）. However, to our knowledge, only few thorough and systematical matrix effect study of U-bearing oxide minerals has been reported. In this study, we systematically analyzed the matrix effect of U-bearing oxide minerals in order to take place the standards which are difficult to prepare with available standards.展开更多
目的分析1990―2019年中国阿尔茨海默病(Alzheimer disease,AD)与其他痴呆症的疾病负担变化趋势及其危险因素,为合理配置卫生资源和制定针对AD与其他痴呆症防治策略提供依据。方法收集2019年全球疾病负担(global burden of disease 2019...目的分析1990―2019年中国阿尔茨海默病(Alzheimer disease,AD)与其他痴呆症的疾病负担变化趋势及其危险因素,为合理配置卫生资源和制定针对AD与其他痴呆症防治策略提供依据。方法收集2019年全球疾病负担(global burden of disease 2019,GBD 2019)研究中1990、2000、2010和2019年中国AD与其他痴呆症疾病负担的相关数据,采用伤残损失健康寿命年(years lived with disability,YLD)、死亡损失寿命年(years of life lost,YLL)、伤残调整寿命年(disability adjusted life years,DALY)、人群归因分值(population attributable fraction,PAF)等指标对1990―2019年中国AD与其他痴呆症及其危险因素疾病负担进行描述,并对比分析与全球AD疾病负担的差异性。结果2019年中国AD的YLD率、YLL率和DALY率均随年龄增大而升高,其中≥95岁人群疾病负担最重。中国1990―2019年AD的标化YLD率、YLL率和DALY率分别增加了1.35%、-0.12%和0.29%,全球的标化YLD率、YLL率和DALY率分别增加了0.28%、0.15%和0.19%。1990―2019年中国AD危险归因分析可见,行为因素和代谢因素均导致AD疾病负担的增加。女性由行为因素造成的疾病风险高于男性,而由代谢因素造成的疾病风险低于男性。结论尽管AD的疾病负担仍持续增加,但可以通过对包括行为和代谢因素等危险因素制定有针对性的预防和控制策略来进行有效控制。展开更多
基金financially supported by the National Natural Science Foundation of China(grants No.41503052 and 41373053)the National Science and Technology Infrastructure(grant No.DDK14-39)
文摘Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has attracted remarkable attention to explore evolution of the earth and obtain age information of various geological processes. Matrix effect related studies are especially important during in-situ U- Pb dating based on Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry （LA-MC- ICPMS）. However, to our knowledge, only few thorough and systematical matrix effect study of U-bearing oxide minerals has been reported. In this study, we systematically analyzed the matrix effect of U-bearing oxide minerals in order to take place the standards which are difficult to prepare with available standards.
文摘目的分析1990―2019年中国阿尔茨海默病(Alzheimer disease,AD)与其他痴呆症的疾病负担变化趋势及其危险因素,为合理配置卫生资源和制定针对AD与其他痴呆症防治策略提供依据。方法收集2019年全球疾病负担(global burden of disease 2019,GBD 2019)研究中1990、2000、2010和2019年中国AD与其他痴呆症疾病负担的相关数据,采用伤残损失健康寿命年(years lived with disability,YLD)、死亡损失寿命年(years of life lost,YLL)、伤残调整寿命年(disability adjusted life years,DALY)、人群归因分值(population attributable fraction,PAF)等指标对1990―2019年中国AD与其他痴呆症及其危险因素疾病负担进行描述,并对比分析与全球AD疾病负担的差异性。结果2019年中国AD的YLD率、YLL率和DALY率均随年龄增大而升高,其中≥95岁人群疾病负担最重。中国1990―2019年AD的标化YLD率、YLL率和DALY率分别增加了1.35%、-0.12%和0.29%,全球的标化YLD率、YLL率和DALY率分别增加了0.28%、0.15%和0.19%。1990―2019年中国AD危险归因分析可见,行为因素和代谢因素均导致AD疾病负担的增加。女性由行为因素造成的疾病风险高于男性,而由代谢因素造成的疾病风险低于男性。结论尽管AD的疾病负担仍持续增加,但可以通过对包括行为和代谢因素等危险因素制定有针对性的预防和控制策略来进行有效控制。
