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Metrological traceable calibration of organic carbon and elemental carbon based on laboratory-generated reference materials

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Journal of Environmental Sciences 2025年第3期149卷 524-534页

作者： Yue liu Junjie liu ji Xiao jing Ye Lixu Guo Caiqing Yan Center for Environmental Metrology National Institute of Metrology ChinaBeijing 100029China College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Environment Research Institute Shandong UniversityQingdao 266237China

Carbonaceous aerosol,including organic carbon(OC)and elemental carbon(EC),has significant influence on human health,air quality and climate *** measurement of carbonaceous aerosol is essential to reduce the uncertainty of radiative forcing estimation and source *** accurate separation of OC and EC is controversial due to the charring of ***,the development of reference materials(RM)for the validation of OC/EC separation is an important basis for further *** RMs were mainly based on ambient air sampling,which could not provide traceability of OC and EC *** develop traceable RMs with known OC/EC contents,our study applied an improved aerosol generation and mixing technique,providing uniform deposition of particles on quartz *** generate OC aerosol with similar pyrolytic property of ambient aerosol,both water soluble organic carbon(WSOC)and water insoluble organic carbon(WIOC)were used,and amorphous carbon was selected for EC *** RMs were analyzed using different *** homogeneity within the filter was validated,reaching below 2%.The long-term stability of RMs has been validated with RSD ranged from 1.7%–3.2%.Good correlationwas observed between nominal concentration of RMswithmeasured concentration by two protocols,while the difference of EC concentration was within 20%.The results indicated that the newly developed RMs were acceptable for the calibration of OC and EC,which could improve the accuracy of carbonaceous aerosol ***,the laboratory-generated EC-RMs could be suitable for the calibration of equivalent BC concentration by Aethalometers.

关键词： Carbonaceous aerosol Split point Reference material Laboratory-generated Traceability

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Manufacture the conducting polymer with light

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Science China Chemistry 2025年第1期68卷 8-9页

作者： Yang Li Tianyu Li Yan ji Baoguang liu College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&TelecommunicationsNanjing 210023China

Poly(3,4-ethylenedioxythiophene)(PEDOT),heralded as the“king”of conducting polymers,is esteemed in bioelectronics for its mixed electronic and ionic conductivity,mechanical properties compatible with biological tissues,tunable healing ability and stability in diverse environments^([1]).Based on additive manufacturing of three-dimensional structures,PEDOT realizes the implementation in the efficient production of flexible bioelectronics,the construction of intricate electrode-neural implantations,and the development of smart brain-computer-interfaces^([2]).

关键词： conducting implantation additive

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Spatiotemporal deformation analysis of glaciers and surrounding landscapes in the Shishapangma region using InSAR techniques

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Journal of Mountain Science 2025年第1期22卷 210-229页

作者： LIANG Wenli liu Rui ji Qin KOU Pinglang Chongqing Key Laboratory of GIS Application School of Geography and TourismChongqing Normal UniversityChongqing 401331China National Earth System Science Data Center Beijing 100000China Chongqing Engineering Research Center of Spatial Big Data Intelligent Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Tourism Multisource Data Perception and Decision Ministry of Culture and Tourism(TMDPDMCT)Chongqing University of Posts and TelecommunicationsChongqing 400065China

Glacier dynamics in the Himalayan midlatitudes,particularly in regions like the Shishapangma,are not yet fully understood,especially the localized topographic and climatic impacts on glacier *** study analyzes the spatiotemporal characteristics of glacier surface deformation in the Shishapangma region using the Small Baseline Subset(SBAS)Interferometric Synthetic Aperture Radar(In SAR)*** analysis reveals an average deformation rate of-4.02±17.65 mm/yr across the entire study area,with glacier regions exhibiting significantly higher rates of uplift(16.87±13.20 mm/yr)and subsidence(20.11±14.55 mm/yr)compared to non-glacier *** identifies significant surface lowering on the mountain flanks and localized uplift in certain catchments,emphasizing the higher deformation rates in glacial areas compared to non-glacial *** found a strong positive correlation between temperature and cumulative deformation(correlation coefficient of 0.63),particularly in glacier areas(0.82).The research highlights the role of temperature as the primary driver of glacier wastage,particularly at lower elevations,with strong correlations found between temperature and cumulative *** also indicates the complex interactions between topographic features,notably,slope gradient,which shows a positive correlation with subsidence rates,especially for slopes below 35°.South-,southwest-,and west-facing slopes exhibit significant uplift,while north-,northeast-,and east-facing slopes predominantly ***,we identified transition zones between debris-covered glaciers and clean ice as areas of most intense deformation,with average rates exceeding 30 mm/yr,highlighting these as potential high-risk zones for *** study comprehensively analyzes the deformation characteristics in both glacier and non-glacier areas in the Shishapangma region,revealing the complex interplay of topographic,climatic,and hydrological factors influencing glacier dynamic

关键词： Glacier melting SBAS-InSAR Topographic factors Temperature change Middle Himalayas

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Oxidation-reduction process of Arabidopsis thaliana roots induced by bisphenol compounds based on RNA-seq analysis

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Journal of Environmental Sciences 2025年第2期148卷 188-197页

作者： Xiaotong ji Weiwei Wang jiande Li Liangpo liu Huifeng Yue Department of Environmental Health School of Public HealthShanxi Medical UniversityTaiyuan 030001China MOE Key Laboratory of Coal Environmental Pathogenicity and Prevention Shanxi Medical UniversityTaiyuan 030001China Center for Ecological Public Health Security of Yellow River Basin Shanxi Medical UniversityTaiyuan 030001China Department of Public Health Laboratory Sciences School of Public HealthShanxi Medical UniversityTaiyuan 030001China College of Environment and Resource Research Center of Environment and HealthShanxi UniversityTaiyuan 030006China

Bisphenol compounds(BPs)have various industrial uses and can enter the environment through various *** evaluate the ecotoxicity of BPs and identify potential gene candidates involved in the plant toxicity,Arabidopsis thaliana was exposed to bisphenol A(BPA),BPB,BPE,BPF,and BPS at 1,3,10 mg/L for a duration of 14 days,and their growth status were *** day 14,roots and leaves were collected for internal BPs exposure concentration detection,RNA-seq(only roots),and morphological *** shown in the results,exposure to BPs significantly disturbed root elongation,exhibiting a trend of stimulation at low concentration and inhibition at high ***,BPs exhibited pronounced generation of reactive oxygen species,while none of the pollutants caused significant changes in root *** exposure concentration analysis indicated that BPs tended to accumulate in the roots,with BPS exhibiting the highest level of *** results of RNA-seq indicated that the shared 211 differently expressed genes(DEGs)of these 5 exposure groups were enriched in defense response,generation of precursormetabolites,response to organic substance,response to oxygen-containing,response to hormone,oxidation-reduction process and so *** unique DEGs in each group,BPS wasmainly associated with the redox pathway,BPB primarily influenced seed germination,and BPA,BPE and BPF were primarily involved in metabolic signaling *** results provide newinsights for BPs induced adverse effects on Arabidopsis thaliana and suggest that the ecological risks associated with BPA alternatives cannot be ignored.

关键词： Bisphenol compounds Arabidopsis thaliana Root elongation RNA-seq ROS

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CAF-derived exosome-miR-3124-5p promotes malignant biological processes in NSCLC via the TOLLIP/TLR4-MyD88-NF-κB pathway

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Oncology Research 2025年第1期33卷 133-148页

作者： TAO SUN QINGhua SONG hua liu Department of Respiratory and Critical Care Medicine Affiliated Hospital of Nantong UniversityMedical School of Nantong UniversityNantong226001China Department of Emergency The People’s Hospital of RugaoNantong226500China Department of Haematology The People’s Hospital of RugaoNantong226500China

Background:Lung cancer is a life-threatening disease that occurs worldwide,but is especially common in *** crucial role of the tumour microenvironment(TME)in non-small cell lung cancer(NSCLC)has attracted recent ***-associated fibroblasts(CAFs)are the main factors that contribute to the TME function,and CAF exosomes are closely linked to ***:The expression levels of miR-3124-5p and Toll-interacting protein(TOLLIP)were analysed by bioinformatics prediction combined with RT-qPCR/Western Blot *** were isolated and identified from clinical NSCLC *** electron microscopy and Western Blot were used to identify exosomes from these *** in proliferation(CCK-8 and clone formation),migration(wound healing),and invasion(transwell)of NSCLC cells were *** Luciferase reporter test was applied to clarify the binding of miR-3124-5p to *** TOLLIP/TLR4/MyD88/NF-κB pathway proteins were determined using Western blot ***:MiR-3124-5p is overexpressed in clinical tissues and cells of ***-3124-5p was dramatically enriched in CAF-derived *** experiments revealed that CAFs delivered miR-3124-5p into NSCLC cells via exosomes,stimulating cancer cell ***-3124-5p acted as a sponge to negatively regulate TOLLIP expression,which activated the TLR4/MyD88/NF-κB axis to promote the occurrence and development of *** salvage tests were performed to determine whether CAF-exosome-derived miR-3124-5p plays a pro-cancer role in NSCLC by affecting the TOLLIP signalling ***:These results provide an interesting direction for the diagnosis and therapy of NSCLC.

关键词： Non-small cell lung cancer(NSCLC) Cancer-associated fibroblasts(CAFs) Exosomes miR-3124-5p Toll-interacting protein(TOLLIP)

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Coastal blue carbon ecosystems in China

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China Geology 2022年第1期5卷 193-194页

作者： Fa-ming Wang jing-fan Zhang Si-yuan Ye ji-hua liu Xiaoliang Research Station of Tropical Coastal Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China Guangdong Provincial Laboratory of Southern Ocean Science and Engineering(Guangzhou) Guangzhou 511458China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266237China Marine Research Institute Shandong UniversityQingdao 266237China

*** are blue carbon ecosystems?Coastal blue carbon ecosystems(BCEs)consists of salt marshes,mangroves,and seagrass *** function as carbon(C)sink is an important pathway to reduce atmospheric carbon dioxide(CO_(2))conc... 详细信息

关键词： ecosystems carbon capacity

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Evolution and generation mechanism of retained oil in lacustrine shales: A combined ReaxFF-MD and pyrolysis simulation perspective

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Petroleum Science 2025年第1期22卷 29-41页

作者： Biao Sun Xiao-Ping liu jie liu Tian liu Zu-Xian hua Wen-Di Peng National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing) College of Geosciences China University of Petroleum (Beijing) International Petroleum Exploration and Production Corporation SINOPEC

To accurately investigate the evolution characteristics and generation mechanism of retained oil, the study analyzed organic-rich lacustrine shale samples from the Paleogene Kongdian Formation in Cangdong Sag, Bohai Bay Basin. This analysis involves Rock-Eval pyrolysis, pyrolysis simulation experiments,Gas Chromatograph Mass Spectrometer（GC-MS）, and reactive molecular dynamics simulations（Reax FF）. The results revealed the retained oil primarily consisted of n-alkanes with carbon numbers ranging from C14to C36. The generation of retained oil occurred through three stages. A slow growth stage of production rate was observed before reaching the peak of oil production in Stage I. Stage II involved a rapid increase in oil retention, with C12-C17and C24-C32serving as the primary components,increasing continuously during the pyrolysis process. The generation process involved the cleavage of weak bonds, including bridging bonds（hydroxyl, oxy, peroxy, imino, amino, and nitro）, ether bonds, and acid amides in the first stage（Ro= 0.50%-0.75%）. The carbon chains in aromatic ring structures with heteroatomic functional groups breaks in the second stage（Ro= 0.75%-1.20%）. In the third stage（Ro= 1.20%-2.50%）, the ring structures underwent ring-opening reactions to synthesize iso-short-chain olefins and radicals, while further breakdown of aliphatic chains occurred. By coupling pyrolysis simulation experiments and molecular simulation technology, the evolution characteristics and bond breaking mechanism of retained oil in three stages were revealed, providing a reference for the formation and evolution mechanism of retained oil.

关键词： Lacustrine shale Retained oiliness evolution Pyrolysis simulation experiments ReaxFF molecular dynamics Hydrocarbon generation evolution

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Mercury contents and potential exposure risk of rice-containing food products

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Journal of Environmental Sciences 2025年第2期148卷 683-690页

作者： Xin Wang Yingjun Wang Yaqi Zhang Ziyan liu Xiaomeng ji Yong Cai Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Department of Chemistry&Biochemistry Florida International UniversityMiamiFL 33199USA

Mercury(Hg),especially methylmercury(MeHg),accumulation in rice grain due to rice paddy possessing conditions conducive to Hg methylation has led to human Hg exposure through consumption of rice-based daily *** addition to being a food staple,rice is widely used as a raw material to produce a vast variety of processed food *** is known about Hg levels in snacking rice-food products and potential Hg exposure from consumption of them,besides previous studies on infant rice *** to provide complementary information for a more complete assessment on Hg exposure risk originated from Hgcontaining rice,this study determined total Hg(THg)and MeHg levels in 195 rice-containing and rice-free processed food products covering all major types of snack foods marketed in China and the estimated daily intake(EDI)of dietary Hg from the consumption of these *** results clearly showed THg and MeHg contents in rice-containing foods were significantly higher than rice-free products,suggesting the transfer of Hg and MeHg from the rice to the end products,even after manufacturing ***,significant positive correlations were observed between THg,MeHg,or MeHg/THg ratio and rice content for samples containing multiple grains as ingredients,further indicating the deciding role of rice for Hg levels in the end food *** the EDI of THg and MeHg via ricebased food products were relatively low compared to the reference dose,it should be considered these snacking food products would contribute additive Hg intake outside of the daily regular meals.

关键词： Mercury Methylmercury Processed food products Rice Dietary exposure

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Effectiveness of Lianhua Qingwen Granule and jingyin Gubiao Prescription in Omicron BA.2 Infection and Hospitalization:A Real-World Study of 56,244 Cases in Shanghai,China

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Chinese Journal of Integrative Medicine 2025年第1期31卷 11-18页

作者： ZHANG Yu-jie liu Guo-jian ZHANG Han liu Chen CHEN Zhi-qiang XIAN ji-shu SONG Da-li liu Zhi YANG Xue WANG Ju ZHANG Zhe ZHANG Lu-ying FENG hua ZHANG Yan-qi TAN Liang Department of Basic Medicine Army Medical UniversityChongqing400038China Department of Radiology The First Affiliated Hospital of the Army Medical UniversityChongqing400038China Department of Pediatrics The First Affiliated Hospital of the Army Medical UniversityChongqing400038China Department of Neurosurgery The First Affiliated Hospital of the Army Medical UniversityChongqing400038China State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao SAR519000China Department of Health Statistics College of Military Preventive MedicineArmy Medical UniversityChongqing400038China Department of Critical Care Medicine The First Affiliated Hospital of the Army Medical UniversityChongqing400038China

Objective: To examine the effectiveness of Chinese medicine(CM) Lianhua Qingwen Granule(LHQW) and jingyin Gubiao Prescription(JYGB) in asymptomatic or mild patients with Omicron infection in the shelter hospital. Methods: This single-center retrospective cohort study was conducted in the largest shelter hospital in Shanghai, China, from April 10, 2022 to May 30, 2022. A total of 56,244 asymptomatic and mild Omicron cases were included and divided into 4 groups, i.e., non-administration group(23,702 cases), LHQW group(11,576 cases), JYGB group(12,112 cases), and dual combination of LHQW and JYGB group(8,854 cases). The length of stay(LOS) in the hospital was used to assess the effectiveness of LHQW and JYGB treatment on Omicron infection. Results: Patients aged 41–60 years, with nadir cycle threshold(CT) value of N gene <25, or those fully vaccinated preferred to receive CM therapy. Before or after propensity score matching(PSM), the multiple linear regression showed that LHQW and JYGB treatment were independent influence factors of LOS(both P<0.001). After PSM, there were significant differences in LOS between the LHQW/JYGB combination and the other groups(P<0.01). The results of factorial design ANOVA proved that the LHQW/JYGB combination therapy synergistically shortened LOS(P=0.032). Conclusions: Patients with a nadir CT value <25were more likely to accept CM. The LHQW/JYGB combination therapy could shorten the LOS of Omicron-infected individuals in an isolated environment.

关键词： Lianhua Qingwen Granule jingyin Gubiao Prescription Chinese medicine Omicron COVID-19

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Rapid and scalable preparation of highly quaternized polymer networks to achieve efficient simultaneous adsorption of iodide and pertechnetate

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Science China Chemistry 2025年第1期68卷 337-349页

作者： Meiyun Xu Song Gu Fulong Chen Zhe Zhao Peng liu Daoben hua State Key Laboratory of Radiation Medicine and Protection School of Radiological and Interdisciplinary Sciences(RAD-X)Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China

The efficient separation of fission products,such as TcO_(4)^(-)and I^(-),holds strategic significance for the management of radioactive wastes and environmental *** this study,we propose an ultrafast strategy for scalable preparation of a highly quaternized organic network to facilitate efficient and synchronous separation of iodide and *** network can be prepared within a few minutes at room temperature,using polyethylenimine and 1,2,4,5-tetrakis(bromomethyl)benzene as building *** chlorine replacement,the network,abundantly decorated with quaternary ammonium groups(Cl@QPN),exhibits an ultrahigh positive charge density of 7.6 mmol/*** enables the rapid and efficient enrichment of target anions through strong electrostatic Coulomb *** a result,Cl@QPN exhibits significantly higher adsorption rate constants of 0.830 g/(mg min)for ReO_(4)^(-)(a nonradioactive surrogate of TcO_(4)^(-))and 0.677 g/(mg min)for I-compared to other ***,it possesses high adsorption capacities,reaching 1,681 mg/g for ReO_(4)^(-)and 917.4 mg/g for I-.Cl@QPN also demonstrates good selectivity towards target ions and shows efficient adsorption for^(99)TcO_(4)^(-).Additionally,Cl@QPN exhibits high dynamic processing capacities,handling up to 3,100 and 7,400 kg of simulated streams per kilogram of material for I-and ReO_(4)^(-),respectively.

关键词： quaternized polymer networks adsorption pertechnetate iodide liquid radioactive streams

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