Application of metal organic framework in wastewater treatment

Water pollution is an increasingly serious environmental problem because many pollutants have carcinogenic effects on humans and aquatic organisms.Metal organic framework(MOF),made up of metal ions and multifunctional organic ligands,has been one of the most concerned materials because of its adjustable and regular pore structure.MOFs have always shown attractive advantages in membrane separation and adsorption technologies,among which water-stable MOFs are particularly prominent in wastewater treatment(WWT)applications.This review systematically summarizes the application of MOF membranes in membrane filtration,membrane pervaporation and membrane distillation.Also,the adsorption mechanisms of heavy metals,dyes and antibacterials in wastewater have been concluded.In order to tap the full application potential of pristine MOFs in sustainable wastewater treatment,current challenges are discussed in detail and future research directions are proposed.

Rapid report of June 1,2022 M_(W) 5.9 Lushan earthquake,China with geodetic and teleseismic data

Timely response to earthquake characterization can facilitate earthquake emergency rescue and further scientific investigations.On June 1,2022,M_(W) 5.9 earthquake occurred in the southern area of the Longmenshan fault zone.This event also happened at the south end of the Dayi seismic gap and is the largest earthquake that has occurred in this seismic gap since the 1970 M 6.2 event.The slip-distribution model constrained by the seismic waveforms suggests a thrust-dominated faulting mechanism.The main slip occurs at a depth of~14 km,and the cumulative energy is released in the first 6 s.The variations of Coulomb stress caused by the mainshock show a positive change in the southwest area of the Dayi seismic gap,indicating possible activation of future earthquakes.In addition,we emphasize the importance of rapid estimation of deformation for near-field hazard delineation,especially when interferometric radar fails to image coseismic deformation in a high relief terrain.

Recent advancement on technical requirements for grid integration of wind power

The installation of wind energy has experienced rapid development during recent years.As a result,the operation of power system can be greatly affected.Therefore,the operators of different countries have formulated the grid codes which reinforce technical requirements for wind power plants.In this paper,recent grid codes published in different countries have been carefully reviewed.The basic requirements of active power control and reactive power compensation,both of which have particular influence on wind power plants operation,are focused on.Based on this review,it is understood that with the increasing integration of wind energy,there is a worldwide trend to regulate the performance of wind power plants so that they can contribute to the stability and reliability of power system.

小胶质细胞对阿尔兹海默病发生发展的影响作用

阿尔兹海默病（老年性痴呆,AD）是由β淀粉样蛋白（Aβ）和微管相关蛋白（Tau）聚集形成的具有毒性作用的寡聚物而引起的老年人主要以记忆力下降和脑部形成老年斑、神经纤维缠绕为特征的神经退行性疾病.小胶质细胞作为中枢神经系统中的固有免疫细胞,是脑内免疫监视的关键成分,发挥内源性免疫防御作用.正常生理状态的小胶质细胞能有效吞噬和清除毒性Aβ寡聚体,阻止AD发生.在AD病理过程中,过度激活的小胶质细胞通过补体依赖途径过度吞噬突触,导致突触丧失,同时大量释放炎症因子,促进Tau相关病理变化,对神经元造成直接损伤,导致认知功能下降.由此可见,小胶质细胞在AD发生发展过程中起着双刃剑的作用,探明小胶质细胞的极化状态及其在AD疾病机理中的作用将为攻克AD的药物研发提供突破性思路.要点：

Electrospun Metal–Organic Framework Nanofiber Membranes for Energy Storage and Environmental Protection

Metal–organic frameworks(MOFs)are attractive in many fields due to their unique advantages.However,the practical applications of single MOF materials are limited.In recent years,a large number of MOF-based composites have been investigated to overcome the defects of single MOF materials to broaden the avenues for the practical applications of MOFs.Among them,MOF-based hybrid nanofiber membranes fabricated by electrospinning combine the advantages of polymer nanofibers and inorganic porous materials,receiving extensive attention and development in energy storage and environmental protection.This review systematically summarizes the recent progress of MOF-based hybrid nanofiber membranes prepared by electrospinning from the perspectives of preparation and application.Firstly,two main methods for preparing MOF/polymer nanofibrous membranes are discussed.Next,the applications of MOF/polymer nanofibrous membranes in energy storage and environmental protection are summarized at length.Finally,to fully tap the potential of MOF-based nanofiber membranes in more fields,the current challenges are proposed,and future research directions are discussed.

Procyclicality of Local Government Debt Financing and Its Theoretical Explanation

This paper aims to examine the dynamic characteristics of local government debt in the economic cycle and to explore the reasons.Using the provincial panel data from 2002 to 2014 and system GMM,this paper finds that the accumulation rate of local debt is characterized by procyclicality.With each additional percentage of the output gap,the implicit debt growth rate may increase by 5.92%and 3.97%respectively during the boom and recession.Even with controlled the market financing environment,this feature is still evident.Further empirical analysis finds that officials’promotion pressure aggravates the pro-cyclical nature of local debt.Local debt is not only an important financing tool for local governments to ease capital constraints and stimulate economic growth,but also threatens economic stability because of its risk attributes.This paper argues that local governments have different emphasis on their goals at different stages of the economic cycle which may be an important reason for the pro-cyclical characteristics of local debts.