The aging effects of the contact angle and surface energy on polyethylene terephthalate (PET) have been investigated with surface modification by water vapor plasma. The experimental results show that the contact ang...The aging effects of the contact angle and surface energy on polyethylene terephthalate (PET) have been investigated with surface modification by water vapor plasma. The experimental results show that the contact angle of water and PET decreases obviously and surface energy increases. However, with the increase of the aging time, the contact angle and surface energy change back gradually to original state.展开更多
The Asia Pacific Council for Study of the AgingMale was established on 1 March 2001. In the FoundingMeeting, the Council Functionaries, Mission and Objec-tives were fully discussed and passed.ChairmanTan Hui Meng (Mal...The Asia Pacific Council for Study of the AgingMale was established on 1 March 2001. In the FoundingMeeting, the Council Functionaries, Mission and Objec-tives were fully discussed and passed.ChairmanTan Hui Meng (Malaysia)展开更多
Background:Digital exclusion is a global issue that disproportionately affects older individuals especially in low-and middle-income nations.However,there is a wide gap in current research regarding the impact of digi...Background:Digital exclusion is a global issue that disproportionately affects older individuals especially in low-and middle-income nations.However,there is a wide gap in current research regarding the impact of digital exclusion on the mental health of older adults in both high-income and low-and middle-income countries.Methods:We analyzed data from 5 longitudinal cohorts:the Health and Retirement Study(HRS),the English Longitudinal Study of Aging(ELSA),the Survey of Health,Ageing and Retirement in Europe(SHARE),the China Health and Retirement Longitudinal Study(CHARLS),and the Mexican Health and Aging Study(MHAS).These cohorts consisted of nationwide samples from 24 countries.Digital exclusion was defined as the self-reported lack of access to the internet.Depressive symptoms were assessed using comparable scales across all cohorts.We used generalized estimating equation models,fitting a Poisson model,to investigate the association between the digital exclusion and depressive symptoms.We adjusted for the causal directed acyclic graph(DAG)minimal sufficient adjustment set(MSAS),which includes gender,age,retirement status,education,household wealth,social activities,and weekly contact with their children.Results:During the study period(2010–2018),122,242 participants underwent up to 5 rounds of follow-up.Digital exclusion varied greatly across countries,ranging from 21.1%in Denmark to 96.9%in China.The crude model revealed a significant association between digital exclusion and depressive symptoms.This association remained statistically significant in the MSAS-adjusted model across all cohorts:HRS[incidence rate ratio(IRR),1.37;95% confidence interval(CI),1.28 to 1.47],ELSA(IRR,1.32;95%CI,1.23 to 1.41),SHARE(IRR,1.30;95%CI,1.27 to 1.33),CHARLS(IRR,1.62;95%CI,1.38 to 1.91),and MHAS(IRR,1.31;95%CI,1.26 to 1.37);all Ps<0.001.Notably,this association was consistently stronger in individuals living in lower wealth quintile households across all 5 cohorts and among those who do not regularly interact with their children,except for ELSA.Conclusions:Digital exclusion is globally widespread among older adults.Older individuals who are digitally excluded are at a higher risk of developing depressive symptoms,particularly those with limited communication with their offspring and individuals living in lower wealth quintile households.Prioritizing the provision of internet access to older populations may help reduce the risks of depression symptoms,especially among vulnerable groups with limited familial support and with lower income.展开更多
The behavior of chloride adsorbed on Ag(100) electrode has been studied using chronoamperometric technique, and the structural transition of chloride layer has been confirmed.
The last 4 decades of reform and opening up have not only witnessed the rapid development of China’s social economy,but have also marked the crucial transition of China’s demographic structure from one that is matur...The last 4 decades of reform and opening up have not only witnessed the rapid development of China’s social economy,but have also marked the crucial transition of China’s demographic structure from one that is mature to one that is old.As China’s population has aged rapidly in recent years,studies of aging have made worthwhile achievements documenting the process.This article mainly summarizes the development of studies on aging in China during the past 40 years and finds that research into the topic of aging during these years can be divided into three phases.The phases are characterized by particular kinds of research.Phase one,the study of aging trends and causes;phase two,the study of aging characteristics and policy responses;and phase three,the study of top-level design of aging policies and programs,and the development of integrated interdisciplinary research efforts.The five main characteristics of China’s studies on aging during the past 4 decades and five future prospects for studies on aging are discussed at the end of this paper.展开更多
PGSE NMR and ESI-MS studies of different grades of hydrolytic methylaluminoxane(MAO)demonstrate a correlation between the average dimensions and anion distribution of MAO.This correlation is revealed through aging and...PGSE NMR and ESI-MS studies of different grades of hydrolytic methylaluminoxane(MAO)demonstrate a correlation between the average dimensions and anion distribution of MAO.This correlation is revealed through aging and gelation studies of a commercial formulation of MAO.Formulations featuring an anion distribution skewed to higher m/z ratios have been observed to contain significantly higher activator contents as measured by 1H NMR spectroscopy,despite being otherwise very similar.PGSE NMR studies in toluene vs.chlorobenzene media demonstrate that the average hydrodynamic dimensions of MAO are largely unaffected by solvent polarity,although aggregation behavior is somewhat sensitive to solvent polarity.As for catalyst activation and ion-pair speciation,the situation in polar solvents is complicated by the formation of solvated cations(and anions)in chlorobenzene which dramatically lower dimensions.DFT studies of model aluminoxane structures in the size range of MAO featuring a variety of architectures,molar masses and Me3Al contents reveal a linear correlation between Dt,as measured by PGSE NMR,and molar mass using simple relationships and estimates of molecular volume if suitable high molecular weight standards are available.There is reasonable agreement in molar mass with available ESI-MS data,recognizing that MAO is not monodisperse.展开更多
文摘The aging effects of the contact angle and surface energy on polyethylene terephthalate (PET) have been investigated with surface modification by water vapor plasma. The experimental results show that the contact angle of water and PET decreases obviously and surface energy increases. However, with the increase of the aging time, the contact angle and surface energy change back gradually to original state.
文摘The Asia Pacific Council for Study of the AgingMale was established on 1 March 2001. In the FoundingMeeting, the Council Functionaries, Mission and Objec-tives were fully discussed and passed.ChairmanTan Hui Meng (Malaysia)
基金supported by the National Key R&D Program of China(2023YFC3606400 and 2023YFB4603200)Major Project of the National Social Science Fund of China(23&ZD188)National Natural Science Foundation of China(72374013).
文摘Background:Digital exclusion is a global issue that disproportionately affects older individuals especially in low-and middle-income nations.However,there is a wide gap in current research regarding the impact of digital exclusion on the mental health of older adults in both high-income and low-and middle-income countries.Methods:We analyzed data from 5 longitudinal cohorts:the Health and Retirement Study(HRS),the English Longitudinal Study of Aging(ELSA),the Survey of Health,Ageing and Retirement in Europe(SHARE),the China Health and Retirement Longitudinal Study(CHARLS),and the Mexican Health and Aging Study(MHAS).These cohorts consisted of nationwide samples from 24 countries.Digital exclusion was defined as the self-reported lack of access to the internet.Depressive symptoms were assessed using comparable scales across all cohorts.We used generalized estimating equation models,fitting a Poisson model,to investigate the association between the digital exclusion and depressive symptoms.We adjusted for the causal directed acyclic graph(DAG)minimal sufficient adjustment set(MSAS),which includes gender,age,retirement status,education,household wealth,social activities,and weekly contact with their children.Results:During the study period(2010–2018),122,242 participants underwent up to 5 rounds of follow-up.Digital exclusion varied greatly across countries,ranging from 21.1%in Denmark to 96.9%in China.The crude model revealed a significant association between digital exclusion and depressive symptoms.This association remained statistically significant in the MSAS-adjusted model across all cohorts:HRS[incidence rate ratio(IRR),1.37;95% confidence interval(CI),1.28 to 1.47],ELSA(IRR,1.32;95%CI,1.23 to 1.41),SHARE(IRR,1.30;95%CI,1.27 to 1.33),CHARLS(IRR,1.62;95%CI,1.38 to 1.91),and MHAS(IRR,1.31;95%CI,1.26 to 1.37);all Ps<0.001.Notably,this association was consistently stronger in individuals living in lower wealth quintile households across all 5 cohorts and among those who do not regularly interact with their children,except for ELSA.Conclusions:Digital exclusion is globally widespread among older adults.Older individuals who are digitally excluded are at a higher risk of developing depressive symptoms,particularly those with limited communication with their offspring and individuals living in lower wealth quintile households.Prioritizing the provision of internet access to older populations may help reduce the risks of depression symptoms,especially among vulnerable groups with limited familial support and with lower income.
文摘The behavior of chloride adsorbed on Ag(100) electrode has been studied using chronoamperometric technique, and the structural transition of chloride layer has been confirmed.
文摘The last 4 decades of reform and opening up have not only witnessed the rapid development of China’s social economy,but have also marked the crucial transition of China’s demographic structure from one that is mature to one that is old.As China’s population has aged rapidly in recent years,studies of aging have made worthwhile achievements documenting the process.This article mainly summarizes the development of studies on aging in China during the past 40 years and finds that research into the topic of aging during these years can be divided into three phases.The phases are characterized by particular kinds of research.Phase one,the study of aging trends and causes;phase two,the study of aging characteristics and policy responses;and phase three,the study of top-level design of aging policies and programs,and the development of integrated interdisciplinary research efforts.The five main characteristics of China’s studies on aging during the past 4 decades and five future prospects for studies on aging are discussed at the end of this paper.
基金support from the University of Perugia and the European Union-NextGenerationEU under the Italian Ministry of University and Research(MUR)National Innovation Ecosystem grant ECS00000041-VITALITYthe University of Victoria for a Visiting Scientist position and Prof.J.S.McIndoe for the use of facilities in connection with the aging study conducted as a consultant to Albemarle.M.L.acknowledges the support of the Research Council of Finland,decision 357509.DFT computations were made possible by the use of the Finnish Grid and Cloud Infrastructure resources(urn:nbn:fi:research-infras-2016072533)+1 种基金NSERC(Strategic Project Grant#478998-15)NOVA Chemicals Centre for Applied Research for operational funding and CFI,BCKDF,and the University of Victoria for infrastructural support.
文摘PGSE NMR and ESI-MS studies of different grades of hydrolytic methylaluminoxane(MAO)demonstrate a correlation between the average dimensions and anion distribution of MAO.This correlation is revealed through aging and gelation studies of a commercial formulation of MAO.Formulations featuring an anion distribution skewed to higher m/z ratios have been observed to contain significantly higher activator contents as measured by 1H NMR spectroscopy,despite being otherwise very similar.PGSE NMR studies in toluene vs.chlorobenzene media demonstrate that the average hydrodynamic dimensions of MAO are largely unaffected by solvent polarity,although aggregation behavior is somewhat sensitive to solvent polarity.As for catalyst activation and ion-pair speciation,the situation in polar solvents is complicated by the formation of solvated cations(and anions)in chlorobenzene which dramatically lower dimensions.DFT studies of model aluminoxane structures in the size range of MAO featuring a variety of architectures,molar masses and Me3Al contents reveal a linear correlation between Dt,as measured by PGSE NMR,and molar mass using simple relationships and estimates of molecular volume if suitable high molecular weight standards are available.There is reasonable agreement in molar mass with available ESI-MS data,recognizing that MAO is not monodisperse.
