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Nitrogen addition promotes soil carbon accumulation globally

Science China Life Sciences 2025年第1期68卷 284-293页

作者： Xuemei Yang Suhui ma Erhan Huang Danhua Zhang Guoping Chen Jiangling Zhu Chengjun Ji Biao Zhu Lingli Liu Jingyun Fang Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China School of Ecology and Environmental ScienceYunnan University State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences

Soil is the largest carbon(C) reservoir in terrestrial ecosystems and plays a crucial role in regulating the global C cycle and climate *** nitrogen(N) deposition has been widely considered as a critical factor affecting soil organic carbon(SOC) storage, but its effect on SOC components with different stability remains unclear. Here, we analyzed extensive empirical data from 304 sites worldwide to investigate how SOC and its components respond to N addition. Our analysis showed that N addition led to a significant increase in bulk SOC(6.7%), with greater increases in croplands(10.6%) and forests(6.0%) compared to grasslands(2.1%). Regarding SOC components, N addition promoted the accumulation of plant-derived C(9.7%–28.5%) over microbial-derived C(0.2%), as well as labile(5.7%) over recalcitrant components(–1.2%), resulting in a shift towards increased accumulation of plant-derived labile C. Consistently, N addition led to a greater increase in particulate organic C(11.9%) than mineral-associated organic C(3.6%), suggesting that N addition promotes C accumulation across all pools, with more increase in unstable than stable pools. The responses of SOC and its components were best predicted by the N addition rate and net primary productivity. Overall, our findings suggest that N enrichment could promote the accumulation of plant-derived and non-mineral associated C and a subsequent decrease in the overall stability of soil C pool, which underscores the importance of considering the effects of N enrichment on SOC components for a better understanding of C dynamics in soils.

关键词： meta-analysis nitrogen enrichment soil organic carbon carbon accumulation carbon stability

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Nitric Oxide Signaling Molecules in Acupoints:Toward Mechanisms of Acupuncture

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Chinese Journal of Integrative Medicine 2017年第11期23卷 812-815页

作者： ma Sheng-xing Los Angeles Biomedical Research Institute at Harbor-UCLAMedical Center and Department of Obstetrics and Gynecology David Geffen School of MedicineUniversity of California at Los Angeles and Harbor-UCLA Medical CenterTorranceCA(90502)United States

Recent clinical trial studies have demonstrated that the effects of acupuncture on pain improvement are small and no difference between acupoints and non-points. Whether acupuncture needles must be inserted in specific points depends on whether acupoint specificity exists that is still not resolved, and is now urgent. Previous anatomical studies have demonstrated that acupoints exist higher number of nerve fibers/trunks, blood vessels, hair follicles, and sweat glands as well as density of the gap junction. Recent evidence shows that nitric oxide（NO） level is elevated in the acupoints/meridians and is associated with an enhanced expression of NO synthase endowed with transient receptor potential vanilloid type-1. There is growing evidence from international groups showing that acupuncture induces NO-mediated vasodilatation, which increases local blood flow and allows for a flush of algesic or sensitizing substances, leading to pain relief. Previous studies, using a novel biocapture system, have demonstrated that NOx–（total nitrite and nitrate） and cyclic guanosine monophosphate（c GMP） concentrations are consistently increased over skin acupoints compared to non-meridian control regions（NMCR） in humans. Dermal microdialysis in humans showed that NO-c GMP releases in the subcutaneous tissue of acupoint are higher than those in NMCR and increased by electroacupuncture（EA）. Recent studies have demonstrated that low-frequency electrical stimulation and manual acupuncture with low stimulating force and rate produce an elevation of NO release predominantly over acupoints. In contrast, NO levels over the areas of the skin regions are moderately reduced by high-frequency EA stimulation. The results from anatomical and biochemical studies consistently show that acupoints exist higher levels of NO signaling molecules, and stimulus-evoked NO release is also with a higher level at acupoints. Results suggest that NO signaling molecules contribute to the specificity of acupoints,

关键词： acupoint nitric oxide electroacupuncture manual acupuncture reinforcement methods

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Reliability evaluation of PMS considering coupling effect of functional and physical dependency

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Chinese Journal of Aeronautics 2022年第2期35卷 154-163页

作者： Ying CHEN Qichao ma rui KANG Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100083China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China

Aviation and aerospace system are typical Phased-Mission Systems(PMSs)featured with varying configuration,phased load condition and cross phase failure *** coupling effect of Functional Dependency(FDEP)and Physical Dependency(PDEP)has a unique influence on the failure behavior of *** this article,the coupling effect is analyzed,and the degradation of components is modeled with the positive drift wiener process,in which the drift coefficient is related to environmental conditions and operation ***,failure behavior and system reliability are *** avionics controller is studied as a case,with the degradation time distribution model and simulation algorithm,the coupling effect and dynamical system reliability can be *** show that this modeling method can describe the coupling effects of FDEP and PDEP and their influence on the failure behavior and reliability of the PMS system.

关键词： Functional dependency Phased-mission system Physical dependency Reliability evaluation Stochastic degradation process

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Scientific and technological innovations of wastewater treatment in China

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 43-48页

作者： Hui Huang rui ma Hongqiang Ren State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The“dual-carbon”strategy promotes the development of the wastewater treatment sector and is an important tool for leading science and technology *** on the global climate change and the new policies introduced by China,this paper described the new needs for the development of wastewater treatment science and *** offered a retrospective analysis of the historical trajectory of scientific and technological advancements in this *** bibliometrics,it delineated the research hotspots within wastewater treatment,notably highlighting materials genomics,artificial intelligence,and synthetic ***,it posited that,in the future,the field of wastewater treatment should follow the paths of technological innovations with multi-dimensional needs,such as carbon reduction,pollution reduction,health,standardisation,and *** purpose of this paper was to provide references and suggestions for scientific and technological innovations in the field of wastewater treatment,and to contribute to the common endeavor of moving toward a Pollution-Free Planet.

关键词： Wastewater treatment Dual-carbon strategy Technological innovation Carbon reduction

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Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

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International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 119-126页

作者： Xiaoxue Wang Lulu Jin Jinke Wang Rongqiao Wang Xiuchun Liu Kai Gao Jingli Sun Yong Yuan Lingwei ma Hongchang Qian Dawei Zhang School of Energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Institute of Space Long march Vehicle Beijing 100076China National materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Institute of materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Shanghai Spaceflight Precision machinery Institute Shanghai 201600China

The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal ***,limited studies have applied ACM to the corrosion protection properties of organic *** study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors,both applied on ACM sensors,to observe their corrosion protection properties over *** with artificial damage via scratches were exposed to immersion and alternating dry and wet environments,which allowed for monitoring galvanic corrosion currents in *** the corrosion tests,the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy *** trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface *** alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic *** with the blank epoxy coating,the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.

关键词： atmospheric corrosion monitoring technology corrosion inhibitor coating carbon steel corrosion protection

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基于纸基微芯片的样本前处理方法研究进展

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分析测试学报 2025年第1期44卷 91-98页

作者：马亚星顾梦杰李旭东沈先涛华中科技大学同济医学院公共卫生学院湖北武汉430030

纸基微芯片(μPADs)是一种以纸质材料为基底的简易、便携式检测平台,在临床诊断、食品质量控制和环境监测等领域显示出极大的应用前景。作为快速检测平台,纸基微芯片除了需要对目标物进行快速定量,还要完成样本的前处理过程。科学家近... 详细信息

纸基微芯片(μPADs)是一种以纸质材料为基底的简易、便携式检测平台,在临床诊断、食品质量控制和环境监测等领域显示出极大的应用前景。作为快速检测平台,纸基微芯片除了需要对目标物进行快速定量,还要完成样本的前处理过程。科学家近年来开发了多种基于纸基微芯片的样本前处理方法,用于不同样本中目标物的分析。由于纸基具有强兼容性能,增强纸基芯片的样本前处理功能并将其与各种快速检测方法联用,能极大地扩展纸基微芯片的应用领域。该文对纸基微芯片的自驱动以及纸基微芯片自驱动与外驱动相结合的样本前处理方法进行了总结,概述了纸基微芯片在目标分析物提取、富集等前处理方面的研究进展,探讨了各种纸基微芯片前处理方法的优点和局限性。另外还展望了纸基微芯片的发展方向—除了不断提高样品前处理能力来扩展其在样本制备中的应用,还需要开发商业化的纸基微芯片来满足各类行业的检测需求。

关键词：快速分析纸基微芯片分离驱动前处理

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The effect of cation–π interactions in electrolyte/organic nanofiltration systems

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Chinese Journal of Chemical Engineering 2016年第3期24卷 345-352页

作者： Gang Yang Yu ma Weihong xing Nanjing Tech University Nanjing 210009China

The rejection properties of a nanofiltration organic membrane were investigated using KCI solutions, NaC1 solutions, NaC1/benzyl alcohol hybrid solutions and KCl/benzyl alcohol hybrid solutions. The presence of benzyl alcohol （3.7 mol · m-3） caused a decrease in electrolyte rejection within the range of 0 to 6%. The mechanism of the decrease was discussed. The cation-n bond was assumed to form in the hybrid solution and to further induce the partial dehydration of the cation. The steric and charge density inhibition of the salt activity was strengthened, and the salt rejection was thus decreased. A simulation was performed to evaluate the radius of the cation. 2015 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

关键词： Nanofiltration Cation-n interaction Dehydration Steric effect

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Human induced pluripotent stem cell-derived therapies for regeneration after central nervous system injury

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Neural Regeneration Research 2025年第11期20卷 3063-3075页

作者： Stephen Vidman Yee Hang Ethan ma Nolan Fullenkamp Giles W.Plant Department of Neuroscience Ohio State UniversityColumbusOHUSA

In recent years,the progression of stem cell therapies has shown great promise in advancing the nascent field of regenerative *** the non-regenerative nature of the mature central nervous system,the concept that“blank”cells could be reprogrammed and functionally integrated into host neural networks remained *** work has also demonstrated the ability of such cells to stimulate intrinsic growth programs in post-mitotic cells,such as *** embryonic stem cells demonstrated great potential in treating central nervous system pathologies,ethical and technical concerns *** barriers,along with the clear necessity for this type of treatment,ultimately prompted the advent of induced pluripotent stem *** advantage of pluripotent cells in central nervous system regeneration is multifaceted,permitting differentiation into neural stem cells,neural progenitor cells,glia,and various neuronal *** precise spatiotemporal application of extrinsic growth factors in vitro,in addition to microenvironmental signaling in vivo,influences the efficiency of this directed *** the pluri-or multipotency of these cells is appealing,it also poses the risk of unregulated differentiation and teratoma *** of the neuroectodermal lineage,such as neuronal subpopulations and glia,have been explored with varying degrees of *** the risk of cancer or teratoma formation is greatly reduced,each subpopulation varies in effectiveness and is influenced by a myriad of factors,such as the timing of the transplant,pathology type,and the ratio of accompanying progenitor ***,successful transplantation requires innovative approaches to develop delivery vectors that can mitigate cell death and support ***,host immune responses to allogeneic grafts must be thoroughly characterized and further developed to reduce the need for *** to a clinical setting wi

关键词： axon regeneration central nervous system regeneration induced pluripotent stem cells neurotrauma regenerative medicine spinal cord injury stem cell therapy

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Removal of heavy metal ions from aqueous solution using red loess as an adsorbent

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Journal of Environmental Sciences 2011年第9期23卷 1497-1502页

作者： Shengtao xing Meiqing Zhao Zichuan ma College of Chemistry and material Sciences Hebei Normal University Shijiazhuang 050016 China

The adsorption behaviors of heavy metals onto novel low-cost adsorbent,red loess,were *** loess was characterized by X-ray diffraction,scanning electron microscopy and Fourier transform infrared *** results indicated that red loess mainly consisted of silicate,ferric and aluminum *** pH,adsorbent dosage,initial metal concentration,contact time and temperature significantly influenced the efficiency of heavy metals *** adsorption reached equilibrium at 4 hr,and the experimental equilibrium data were fitted to Langmuir monolayer adsorption *** adsorption of Cu（II） and Zn（II） onto red loess was endothermic,while the adsorption of Pb（II） was *** maximum adsorption capacities of red loess for Pb（II）,Cu（II） and Zn（II） were estimated to be 113.6,34.2 and 17.5 mg/g,respectively at 25°C and pH *** maximum removal efficiencies were 100% for Pb（II） at pH 7,100% for Cu（II） at pH 8,and 80% for Zn（II） at pH *** used adsorbents were readily regenerated using dilute HCl solution,indicating that red loess has a high *** the above results demonstrated that red loess could be used as a possible alternative low-cost adsorbent for the removal of heavy metals from aqueous solution.

关键词： red loess adsorption heavy metals

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Unraveling the impacts of intermolecular interaction on morphology evolution for highly efficient organic solar cells and modules

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Science China Chemistry 2025年第1期68卷 264-272页

作者： Xueqing ma Yingying Cheng Yuqiang Liu Xinming Zheng Guangliu Ran Hongxiang Li Xinyue Cui Andong Zhang Wenkai Zhang Pei Cheng Wenchao Huang Zhishan Bo Beijing Key Laboratory of Energy Conversion and Storage materials College of Chemistry Beijing Normal University College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textiles Qingdao University Key State Laboratory of Advanced Technology for materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of Technology Department of Physics and Applied Optics Beijing Area major Laboratory Center for Advanced Quantum Studies Beijing Normal University State Key Laboratory of Polymer materials Engineering College of Polymer Science and Engineering Sichuan University

Understanding the effect of intermolecular interaction on the growth dynamic of active layers is critical for advancing organic solar cells(OSCs). However, the diverse structure of donors and acceptors makes the research challenging. Additives with customizable structures and properties could simplify this complexity. Herein, we meticulously tailor two additives of 3,4-ethylenedioxythiophene(EDOT) and 2,5-dibromo-3,4-ethylenedioxythiophene(DBEDOT), possessing distinct intermolecular interaction features to elaborate the inherent relationship. It is found that varied interaction strengths can alter film formation processes. The enhanced intermolecular interaction between the DBEDOT and non-fullerene acceptor BTP-e C9-4F results in pre-aggregation and longer crystallization duration of BTP-e C9-4F, facilitating the formation of films with compact molecular packing and decent phase separation. Thus, exciton dissociation and charge transport become more efficient. Finally, devices processed with DBEDOT exhibit a remarkable power conversion efficiency of 19.35% in small-area OSCs and 14.11% in bladecoated 5 cm × 5 cm organic solar mini-modules. Especially, OSCs can maintain 80% of their initial efficiency after continuous annealing at 85 °C for over 2,100 h.

关键词： organic solar cell non-fullerene acceptor film growth molecular packing intermolecular interaction

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