绿色暴露与健康服务联系紧密,是促进健康服务的重要一环。基于Web of Science和中国知网数据库,对现有研究成果进行了总结,以健康服务中环境服务与个体健康为研究重点,总结绿色暴露相关指标,研究其促进健康服务的机制,讨论绿色暴露影响...绿色暴露与健康服务联系紧密,是促进健康服务的重要一环。基于Web of Science和中国知网数据库,对现有研究成果进行了总结,以健康服务中环境服务与个体健康为研究重点,总结绿色暴露相关指标,研究其促进健康服务的机制,讨论绿色暴露影响健康服务的现实指导意义。不仅总结了绿色暴露促进健康服务的静态指标,还关注了绿色暴露的动态指标,更精细化地反映人在一定时间内绿色暴露状态的动态变化,更充分地表达绿色暴露与人的密切关系。展开更多
Excessive urbanization leads to considerable nature deficiency and abundant artificial infrastructure in urban areas,which triggered intensive discussions on people's exposure to green space and outdoor artificial...Excessive urbanization leads to considerable nature deficiency and abundant artificial infrastructure in urban areas,which triggered intensive discussions on people's exposure to green space and outdoor artificial light at night(ALAN).Recent academic progress highlights that people's exposure to green space and outdoor ALAN may be confounders of each other but lacks systematic investigations.This study investigates the associations between people's exposure to green space and outdoor ALAN by adopting the three most used research paradigms:population-level residence-based,individual-level residencebased,and individual-level mobility-oriented paradigms.We employed the green space and outdoor ALAN data of 291 Tertiary Planning Units in Hong Kong for population-level analysis.We also used data from 940 participants in six representative communities for individual-level analyses.Hong Kong green space and outdoor ALAN were derived from high-resolution remote sensing data.The total exposures were derived using the spatiotemporally weighted approaches.Our results confirm that the negative associations between people's exposure to green space and outdoor ALAN are universal across different research paradigms,spatially non-stationary,and consistent among different socio-demographic groups.We also observed that mobility-oriented measures may lead to stronger negative associations than residence-based measures by mitigating the contextual errors of residence-based measures.Our results highlight the potential confounding associations between people's exposure to green space and outdoor ALAN,and we strongly recommend relevant studies to consider both of them in modeling people's health outcomes,especially for those health outcomes impacted by the co-exposure to them.展开更多
Theanine is a non-protein amino acid representing as much as 50% of the total amino acids in black tea and 1% - 2% of dry weight in green tea. It has been shown to be able to reduce high blood pressure, promote relaxa...Theanine is a non-protein amino acid representing as much as 50% of the total amino acids in black tea and 1% - 2% of dry weight in green tea. It has been shown to be able to reduce high blood pressure, promote relaxation, and inhibit caffeine’s side effects among others. This current study explored the effects of sunlight and withering durations on theanine levels in tea shoots. Theanine content from three leaves and a bud, two leaves and a bud and internodes were detected and quantified by using High Performance Liquid chromatography (HPLC). Sunlight exposure experiment was started at dawn (0600 HRS, GMT + 3.00) when the light intensity was low and tea was collected at three-hour interval throughout the day to (1800 Hrs, GMT + 3.00) when the light intensity had dropped. At the start of the experiment, the theanine levels were significantly high but as the intensity of sunlight increased during the day there was a significant drop in theanine levels, and as the sun set the theanine levels increased significantly again in all samples. The results also showed that theanine levels were significantly increased after 15 hours of withering. Three leaves and a bud withered for 3 hours had mean theanine levels of 1.41% and those withered for 15 hours had mean theanine levels of 3.11%. Internodes exhibited higher mean theanine levels than those of leaves. In the light of these results, it’s evident that withering for a longer period of time and harvesting of tea when the light intensity is low ensure high amount of theanine in tea.展开更多
绿色暴露是人与绿色空间积极互动的重要结果,为解决儿童与青少年健康问题提供新的契机。运用CiteSpace知识图谱分析软件对322篇Web of Science核心合集收录的相关文献进行文献计量分析,梳理绿色暴露对儿童和青少年健康影响研究的整体发...绿色暴露是人与绿色空间积极互动的重要结果,为解决儿童与青少年健康问题提供新的契机。运用CiteSpace知识图谱分析软件对322篇Web of Science核心合集收录的相关文献进行文献计量分析,梳理绿色暴露对儿童和青少年健康影响研究的整体发展脉络。结果显示:(1)在纵向时间维度上,相关研究历经明显的阶段性特征,多数文献源于景观规划与环境资源类刊物;(2)高频发表的作者组团引导该领域的主要研究方向,文献支持机构主要来自欧美国家的众多高校;(3)在横向关键词维度上,通过共现、突现与时间线分析得出主要关键词,并从实践设计、儿童与青少年成长特点与社会属性出发,分析研究前沿内容;(4)基于研究方法与视角对相关文献进行差异性分析,总结重要的测度指标与发展层次。针对现有研究不足,为未来绿色暴露对儿童与青少年健康研究方向提供参考。展开更多
In this study,numerical simulations were used to explore the effects of roadside green belt,urban street spatial layout,and wind speed on vehicle exhaust emission diffusion in street canyon.The diffusion of different ...In this study,numerical simulations were used to explore the effects of roadside green belt,urban street spatial layout,and wind speed on vehicle exhaust emission diffusion in street canyon.The diffusion of different sized particles in the street canyon and the influence of wind speed were investigated.The individual daily average pollutant intake was used to evaluate the exposure level in a street canyon microenvironment.The central and leeward green belts of the road were the most conducive to the diffusion of pollutants,while the positioning of the green belts both sides of a road was least conducive to the diffusion of pollutants.Pollutant levels increased with increasing canopy height,canopy width,and decreasing tree spacing,with optimal values of 12 m,7 m,and 0.4 H,respectively.This provides protection from pollution for low-rise residents and pedestrians.The results presented here can be used to improve the air quality of the street microenvironment and provide a basis for the renovation of old street buildings.展开更多
文摘绿色暴露与健康服务联系紧密,是促进健康服务的重要一环。基于Web of Science和中国知网数据库,对现有研究成果进行了总结,以健康服务中环境服务与个体健康为研究重点,总结绿色暴露相关指标,研究其促进健康服务的机制,讨论绿色暴露影响健康服务的现实指导意义。不仅总结了绿色暴露促进健康服务的静态指标,还关注了绿色暴露的动态指标,更精细化地反映人在一定时间内绿色暴露状态的动态变化,更充分地表达绿色暴露与人的密切关系。
基金supported by grants from the Hong Kong Research Grants Council(General Research Fund Grant no.14605920,14611621,14606922Collaborative Research Fund Grant no.C4023-20GF+1 种基金Research Matching Grants RMG 8601219,8601242)a grant from the Research Committee on Research Sustainability of Major Research Grants Council Funding Schemes(3133235)of the Chinese University of Hong Kong.
文摘Excessive urbanization leads to considerable nature deficiency and abundant artificial infrastructure in urban areas,which triggered intensive discussions on people's exposure to green space and outdoor artificial light at night(ALAN).Recent academic progress highlights that people's exposure to green space and outdoor ALAN may be confounders of each other but lacks systematic investigations.This study investigates the associations between people's exposure to green space and outdoor ALAN by adopting the three most used research paradigms:population-level residence-based,individual-level residencebased,and individual-level mobility-oriented paradigms.We employed the green space and outdoor ALAN data of 291 Tertiary Planning Units in Hong Kong for population-level analysis.We also used data from 940 participants in six representative communities for individual-level analyses.Hong Kong green space and outdoor ALAN were derived from high-resolution remote sensing data.The total exposures were derived using the spatiotemporally weighted approaches.Our results confirm that the negative associations between people's exposure to green space and outdoor ALAN are universal across different research paradigms,spatially non-stationary,and consistent among different socio-demographic groups.We also observed that mobility-oriented measures may lead to stronger negative associations than residence-based measures by mitigating the contextual errors of residence-based measures.Our results highlight the potential confounding associations between people's exposure to green space and outdoor ALAN,and we strongly recommend relevant studies to consider both of them in modeling people's health outcomes,especially for those health outcomes impacted by the co-exposure to them.
文摘Theanine is a non-protein amino acid representing as much as 50% of the total amino acids in black tea and 1% - 2% of dry weight in green tea. It has been shown to be able to reduce high blood pressure, promote relaxation, and inhibit caffeine’s side effects among others. This current study explored the effects of sunlight and withering durations on theanine levels in tea shoots. Theanine content from three leaves and a bud, two leaves and a bud and internodes were detected and quantified by using High Performance Liquid chromatography (HPLC). Sunlight exposure experiment was started at dawn (0600 HRS, GMT + 3.00) when the light intensity was low and tea was collected at three-hour interval throughout the day to (1800 Hrs, GMT + 3.00) when the light intensity had dropped. At the start of the experiment, the theanine levels were significantly high but as the intensity of sunlight increased during the day there was a significant drop in theanine levels, and as the sun set the theanine levels increased significantly again in all samples. The results also showed that theanine levels were significantly increased after 15 hours of withering. Three leaves and a bud withered for 3 hours had mean theanine levels of 1.41% and those withered for 15 hours had mean theanine levels of 3.11%. Internodes exhibited higher mean theanine levels than those of leaves. In the light of these results, it’s evident that withering for a longer period of time and harvesting of tea when the light intensity is low ensure high amount of theanine in tea.
文摘绿色暴露是人与绿色空间积极互动的重要结果,为解决儿童与青少年健康问题提供新的契机。运用CiteSpace知识图谱分析软件对322篇Web of Science核心合集收录的相关文献进行文献计量分析,梳理绿色暴露对儿童和青少年健康影响研究的整体发展脉络。结果显示:(1)在纵向时间维度上,相关研究历经明显的阶段性特征,多数文献源于景观规划与环境资源类刊物;(2)高频发表的作者组团引导该领域的主要研究方向,文献支持机构主要来自欧美国家的众多高校;(3)在横向关键词维度上,通过共现、突现与时间线分析得出主要关键词,并从实践设计、儿童与青少年成长特点与社会属性出发,分析研究前沿内容;(4)基于研究方法与视角对相关文献进行差异性分析,总结重要的测度指标与发展层次。针对现有研究不足,为未来绿色暴露对儿童与青少年健康研究方向提供参考。
基金funded by the National Natural Science Foundation of China[Grant No.11372166]“Double First-Class”Foundation for the Talents of Shandong University[No.31380089963090].
文摘In this study,numerical simulations were used to explore the effects of roadside green belt,urban street spatial layout,and wind speed on vehicle exhaust emission diffusion in street canyon.The diffusion of different sized particles in the street canyon and the influence of wind speed were investigated.The individual daily average pollutant intake was used to evaluate the exposure level in a street canyon microenvironment.The central and leeward green belts of the road were the most conducive to the diffusion of pollutants,while the positioning of the green belts both sides of a road was least conducive to the diffusion of pollutants.Pollutant levels increased with increasing canopy height,canopy width,and decreasing tree spacing,with optimal values of 12 m,7 m,and 0.4 H,respectively.This provides protection from pollution for low-rise residents and pedestrians.The results presented here can be used to improve the air quality of the street microenvironment and provide a basis for the renovation of old street buildings.
