Background Telehealth interventions （THI） were associated with lower levels of cardiovascular risk factors in adults, whereas the effect of THI on cardiovascular disease （CVD） still remains controversial. A meta-a...Background Telehealth interventions （THI） were associated with lower levels of cardiovascular risk factors in adults, whereas the effect of THI on cardiovascular disease （CVD） still remains controversial. A meta-analysis was conducted to summarize the evidence from randomized controlled trials （RCT） which investigated potential impact of THI on the incidence of CVD in patients with or without prior CVD. Methods PubMed, EmBase, and the Cochrane Library were searched to identify RCTs to fit our analysis through December 2016. Relative risk （RR） with its 95% confidence interval （CI） was used to measure the effect of THI using a random-effect model. Sensitivity analysis, subgroup analysis, heterogeneity tests, and tests for publication bias were also conducted. Results Eight RCTs were included and with a total of 1635 individuals. The summarized results indicated that participants who received THI showed a significant reduction of the CVD incidence as compared with usual care （RR： 0.59; 95% CI： 0.47-0.74; P 〈 0.001）. Furthermore, the effect of THI was greater in patients with history ofCVD （RR： 0.55; 95% CI： 0.44-0.70; P 〈 0.001） than in patients without history ofCVD （RR： 0.99; 95% CI： 0.51-1.94; P = 0.977）. Sensitivity analysis suggested that the intervention effect persisted and the conclusion was not changed. Subgroup analysis indi- cated mean age, study quality might play an important role on the risk of CVD. Conclusions The findings of this study indicated THI could reduce the recurrence of CVD. Further large-scale trials are needed to verify the effect of THI on CVD in healthy individuals.展开更多
Pyrolysis is a cost-effective and safe method for the disposal of radioactive spent resins.In this work,the catalytic effects of V_(2)O_(5) on the pyrolysis of cation exchange resin are investigated for the first time...Pyrolysis is a cost-effective and safe method for the disposal of radioactive spent resins.In this work,the catalytic effects of V_(2)O_(5) on the pyrolysis of cation exchange resin are investigated for the first time.The results show that it is a better catalyst than others so far studied and achieves a lowering of final pyrolysis temperature and residual rate simultaneously when aided by physical blending.The maximum reductions of the final pyrolysis temperature and the residual rate are 173℃and 11.9%(in weight),respectively.Under the action of V_(2)O_(5),low-temperature(445℃)removal of partial sulfonic acid groups occurs and the pyrolysis of the resin copolymer matrix is promoted.This is demonstrated by the analysis of pyrolysis residues at different temperatures by X-ray photoelectron spectroscopy(XPS)and element analysis.The catalytic activity of V_(2)O_(5) is determined by effects both at acid sites and oxidation-reduction centers via H2-TPR(temperature programmed reduction),V_(2)-TPD(temperature programmed desorption),CV_(2)-TPD,and NH3-TPD.The catalytic effect of oxidation-reduction centers in V_(2)O_(5) is achieved by close contact with the sulfur bond through chemisorption under the effect of acid sites.V_(2)O_(5) is also believed to be the reason for the removal of partial sulfonic acid groups at lower temperatures(445℃).V_(2)O_(5) is an effective catalyst for spent resin pyrolysis and can be further applied in industry.展开更多
文摘Background Telehealth interventions （THI） were associated with lower levels of cardiovascular risk factors in adults, whereas the effect of THI on cardiovascular disease （CVD） still remains controversial. A meta-analysis was conducted to summarize the evidence from randomized controlled trials （RCT） which investigated potential impact of THI on the incidence of CVD in patients with or without prior CVD. Methods PubMed, EmBase, and the Cochrane Library were searched to identify RCTs to fit our analysis through December 2016. Relative risk （RR） with its 95% confidence interval （CI） was used to measure the effect of THI using a random-effect model. Sensitivity analysis, subgroup analysis, heterogeneity tests, and tests for publication bias were also conducted. Results Eight RCTs were included and with a total of 1635 individuals. The summarized results indicated that participants who received THI showed a significant reduction of the CVD incidence as compared with usual care （RR： 0.59; 95% CI： 0.47-0.74; P 〈 0.001）. Furthermore, the effect of THI was greater in patients with history ofCVD （RR： 0.55; 95% CI： 0.44-0.70; P 〈 0.001） than in patients without history ofCVD （RR： 0.99; 95% CI： 0.51-1.94; P = 0.977）. Sensitivity analysis suggested that the intervention effect persisted and the conclusion was not changed. Subgroup analysis indi- cated mean age, study quality might play an important role on the risk of CVD. Conclusions The findings of this study indicated THI could reduce the recurrence of CVD. Further large-scale trials are needed to verify the effect of THI on CVD in healthy individuals.
基金Project supported by the National Natural Science Foundation of China(No.U1862203)the National Science Fund for Distinguished Young Scholars(No.21525627)the Science Fund for Creative Research Groups of National Natural Science Foundation of China(No.61621002)。
文摘Pyrolysis is a cost-effective and safe method for the disposal of radioactive spent resins.In this work,the catalytic effects of V_(2)O_(5) on the pyrolysis of cation exchange resin are investigated for the first time.The results show that it is a better catalyst than others so far studied and achieves a lowering of final pyrolysis temperature and residual rate simultaneously when aided by physical blending.The maximum reductions of the final pyrolysis temperature and the residual rate are 173℃and 11.9%(in weight),respectively.Under the action of V_(2)O_(5),low-temperature(445℃)removal of partial sulfonic acid groups occurs and the pyrolysis of the resin copolymer matrix is promoted.This is demonstrated by the analysis of pyrolysis residues at different temperatures by X-ray photoelectron spectroscopy(XPS)and element analysis.The catalytic activity of V_(2)O_(5) is determined by effects both at acid sites and oxidation-reduction centers via H2-TPR(temperature programmed reduction),V_(2)-TPD(temperature programmed desorption),CV_(2)-TPD,and NH3-TPD.The catalytic effect of oxidation-reduction centers in V_(2)O_(5) is achieved by close contact with the sulfur bond through chemisorption under the effect of acid sites.V_(2)O_(5) is also believed to be the reason for the removal of partial sulfonic acid groups at lower temperatures(445℃).V_(2)O_(5) is an effective catalyst for spent resin pyrolysis and can be further applied in industry.
