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Identification of key factors governing chemistry in groundwater near the water course recharged by reclaimed water at Miyun County, Northern China

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Journal of Environmental Sciences 2013年第9期25卷 1754-1763页

作者： Yilei Yu Xianfang Song Yinghua Zhang Fandong Zheng Ji Liang Dongmei Han Ying Ma Hongmei Bu Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of beijing Hydraulic Research

Reclaimed water was successfully used to recover the dry Chaobai River in Northern China, but groundwater may be polluted. To ensure groundwater protection, it is therefore critical to identify the governing factors of groundwater chemistry. Samples of reclaimed water, river and groundwater were collected monthly at Chaobai River from January to September in 2010. Fifteen water parameters were analyzed. Two kinds of reclaimed water were different in type （Na-Ca-Mg-Cl-HCO3 or Na-Ca-Cl-HCO3 ） and concentration of nitrogen. The ionic concentration and type in river were similar to reclaimed water. Some shallow wells near the river bed had the same type （Na-Ca-Mg-Cl-HCO3 ） and high concentration as reclaimed water, but others were consistent with the deep wells （Ca-Mg-HCO3 ）. Using cluster analysis, the 9 months were divided into two periods （dry and wet seasons）, and all samples were grouped into several spatial clusters, indicating different controlling mechanisms. Principal component analysis and conventional ionic plots showed that calcium, magnesium and bicarbonate were controlled by water-rock interaction in all deep and some shallow wells. This included the dissolution of calcite and carbonate weathering. Sodium, potassium, chloride and sulfate in river and some shallow wells recharged by river were governed by evaporation crystallization and mixing of reclaimed water. But groundwater chemistry was not controlled by precipitation. During the infiltration of reclaimed water, cation exchange took place between （sodium, potassium） and （calcium, magnesium）. Nitrification and denitrification both happened in most shallow groundwater, but only denitrification in deep groundwater.

关键词： reclaimed water groundwater chemistry multivariate analysis Chaobai River water-rock interaction evaporation crystallization cation exchange denitrification

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Water quality of reclaimed water from treated urban wastewater in Chaobai River Basin,North China

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Chinese Journal of Population,Resources and Environment 2014年第2期12卷 103-109页

作者： Yilei Yu Xianfang Song Yinghua Zhang Fandong Zheng Licai Liu Institute of Wetland Research Chinese Academy of Forestry Key Laboratory of Water Cycle and Relate Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences beijing Water Science & Technology Institute

The utilization of reclaimed water could be an efficient tool to alleviate water scarcity,especially for dry river ***,it is crucial to monitor water quality to ensure safety to human health and to avoid negative effects on the *** water samples were collected bimonthly from May to November in 2010 in Chaobai River,and the physiochemical parameters were *** main results are as follows:The parameters exceeding the threshold value of the water guidelines are mainly nutrition related to nitrogen and phosphorus,which are known to increase the risk of eutrophication in surface ***,nitrite and nitrate can be detrimental to human *** majority of the parameters have a peaking concentration in May,whereas others either show significant temporal variation over the entire period or remain relatively constant in all four *** analysis shows that some parameters(pH,T and B) have no significant correlation with others,whereas significant positive correlation was found for Sr with EC and TDS,for CI with TDS,for Si02 with TP and for NO3-N with TN and a significant negative correlation between SO4 and *** to principal component analysis,60.108%of the total data is represented by dominant solutes,and the second principal component with a percentage of 31.876 comprises parameters related to *** cluster analysis of parameters identified four groups,which represent different compositions,and samples in May differ from others.

关键词： water quality treated urban wastewater water guidelines multivariate statistical analysis Chaobai River

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Alzheimer's disease with sleep insufficiency:a cross-sectional study on correlations among clinical characteristics,orexin,its receptors,and the bloodbrain barrier

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Neural Regeneration Research 2023年第8期18卷 1757-1762页

作者： Peng Guo Wen-Jing Zhang Teng-Hong Lian Wei-Jiao Zhang Ming-Yue He Ya-Nan Zhang Yue Huang Du-Yu Ding Hui-Ying Guan Jing-Hui Li Dan-Ning Li Dong-Mei Luo Wei-Jia Zhang Hao Yue Xiao-Min Wang Wei Zhang Center for Cognitive Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Blood Transfusion Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Pharmacology School of Medical SciencesFaculty of Medicine&HealthUniversity of New South WalesSydneyAustralia China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Physiology Capital Medical UniversityBeijingChina Center of Parkinson’s Disease Beijing Institute for Brain DisordersBeijingChina beijing Key Laboratory on Parkinson’s Disease BeijingChina

Previous studies have shown that reduced sleep duration,sleep fragmentation,and decreased sleep quality in patients with Alzheimer's disease are related to dysfunction in orexin *** the same time,blood-brain barrier disruption is considered an early biomarker of Alzheimer's ***,currently no report has examined how changes in orexin signaling relate to changes in the blood-brain barrier of patients who have Alzheimer's disease with sleep *** cross-sectional study included 50 patients with Alzheimer's disease who received treatment in 2019 at beijing Tiantan *** were divided into two groups:those with insufficient sleep(sleep duration≤6 hours,n=19,age 61.58±8.54 years,10 men)and those with normal sleep durations(sleep duration>6 hours,n=31,age 63.19±10.09 years,18 men).Demographic variables were collected to evaluate cognitive function,neuropsychiatric symptoms,and activities of daily *** levels of orexin,its receptor proteins,and several blood-brain barrier factors were measured in cerebrospinal *** insufficiency was associated with impaired overall cognitive function that spanned multiple cognitive ***,levels of orexin and its receptors were upregulated in the cerebrospinal fluid,and the blood–brain barrier was *** these events precipitated each other and accelerated the progression of Alzheimer's *** findings describe the clinical characteristics and potential mechanism underlying Alzheimer's disease accompanied by sleep *** the upregulation of elements within the orexin system or preventing the breakdown of the blood-brain barrier could thus be targets for treating Alzheimer's disease.

关键词： Alzheimer's disease blood-brain barrier cerebrospinal fluid clinical characteristics cognitive function matrix metalloproteinases matrix metalloproteinase-3 neuropsychiatric symptoms orexin signaling sleep insufficiency

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Preface

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Journal of Computer Science & Technology 2014年第4期29卷 737-739页

作者： Ke Liu Zhi-Yong Liu Directorate of Information Sciences National Natural Science Foundation of China Beijing Institute of Computing Technology Chinese Academy of Sciences Beijing

It is our great pleasure to announce the publication of the special issue of JCST,"Advances in Computer Science and Technology(Part 2)—Current Advances in the Research of the NSFC Joint Research Fund for Overseas Chinese Scholars and Scholars in Hong Kong and Macao".Although some background information was introduced in Part 1 of the special issue published in July 2014,we would like to introduce again here for ***,as indicated by the issue name,it presents several

关键词： Preface NSFC

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