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Intraseasonal variability of the Kuroshio observed via mooring at 18°n

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Journal of Oceanology and Limnology 2024年第2期42卷 468-483页

作者： Xin YUAn Qingye WAng Jie ma Shijian HU Dunxin HU Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laoshan Laboratory Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Insufficient observations near the origin of the Kuroshio have led to incomplete understanding of the intraseasonal variability(ISV)of the *** measurements of the Kuroshio velocity were performed with an array of three profiler moorings(122.7°E,123°E,and 123.3°E)along 18°n from January 2018 to February *** ISV of the Kuroshio at 18°n was investigated based on a combination of mooring observations and global high-resolution HYbrid Coordinate Ocean Model reanalysis *** estimated time-averaged transport in the upper 350 m across the observation transect was 6.5±2.6 Sv(1.0 Sv=10^(6)m^(3)/s).Two significant ISV peaks at 50-60 and~100 d were recognized in the power spectra of the meridional velocity and *** analysis indicated that the ISV at 50-60 d was caused by westward-propagating eddies at average propagation speed of~13 cm/s and wavelength of~635 *** ISV peak at~100 d was mainly caused by northward-propagating eddies generated in the north Equatorial Current *** investigation indicated that the ISV of the Kuroshio at 18°n is dominated by meridional transport,rather than by the zonal migration of the Kuroshio main *** findings provide a better understanding of the ISV of the Kuroshio east of Luzon Island.

关键词： intraseasonal variability(ISV) Kuroshio mooring observation eddy

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Open-vessel Synthesis of Poly-n-methoxyethylglycine

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Chemical Research in Chinese Universities 2024年第1期40卷 153-158页

作者： LIU guojan ma Ke CHEn Qi ZHAng Donghui LIU Runhui State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai200237P.R.China Key Laboratory for Ultrafine materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryShanghai Frontiers Science Center of Optogenetic Techniques for Cell MetabolismResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237P.R.China School of Biotechnology East China University of Science and TechnologyShanghai200237P.R.China

Polypeptoids are widely used in biological applications owing to their diverse functions and proteolytic *** type of polypeptoids,poly-n-methoxyethylglycine(P-nmeg),has been found to possess remarkable hydrophilicity and notable properties in terms of protein,cell,and bacterial ***,the currently known synthesis methods of P-nmeg include solid-phase synthesis,which is time-consuming and difficult to scale up,and n-substituted n-carboxyanhydride(nnCA)ring-opening polymerization,whose monomers were difficult to *** this study,we used the chemical stable nmeg n-phenoxycarbonyl(nPC)as the monomer,which was obtained without the use of highly toxic reactants,such as phosgene or phosphorus halide,to synthesize P-nmeg under open-vessel *** adding BnnH_(2) as an initiator at 80℃,we can obtain controllable short chain length P-nmeg with narrow dispersity.

关键词： Open-vessel Polypeptoid synthesis Poly-n-methoxyethylglycine Stable monomer narrow dispersity

Insulation Design Rule for a Spacer in SF_(6)/n_(2)-filled DC gas Insulated Apparatus

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 727-735页

作者： Hongyang Zhou guoming ma Meng Zhang Cong Wang Youping Tu Chengrong Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and the Beijing Key Laboratory of High Voltage and EMC North China Electric Power UniversityBeijing 102206China

A recurring challenge of a DC SF_(6)/n_(2)-filled gIS/gIL apparatus is the charge accumulation at DC *** conventional design rules and knowledge of AC spacers may not be applicable for this new type of apparatus.A novel design rule is proposed considering the effect of accumulated charge on the threshold of electric field strength being resistant to the superposed voltage.A surface charge accumulation simulation model is introduced,and the key parameters in the simulation model are *** addition,an experimental platform for a 100 kV spacer flashover test is *** flashover tests under superimposed voltage with opposing polarities are carried out,and the withstanding voltage of the spacer is ***,based on the proposed model,the threshold of the surface electric field strength(tangential component)on the DC spacer in SF_(6)/n_(2) mixed gases is *** a reliable insulation design of a DC gIS/gIL apparatus filled with 0.7 MPa SF_(6)/n_(2),the threshold of surface electric field strength on the DC spacer is 12 kV/*** insulation design rule can be referenced in the design of a high-voltage DC SF_(6)/n_(2)-filled gIS/gIL apparatus.

关键词： Charge accumulation DC spacer flashover voltage SF_(6)/n_(2) threshold of surface electric field strength

Recent advances in solving Li_(2)CO_(3) problems in garnet-based solid-state battery: A systematic review(2020-2023)

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Journal of Energy Chemistry 2024年第3期90卷 58-76,I0004页

作者： Shaoxiong Han Ziqi Wang Yue ma Yanlan Zhang Yongzhen Wang Xiaomin Wang College of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Shanxi Joint Laboratory of Coal based Solid Waste Resource Utilization and green Ecological Development Taiyuan 030024ShanxiChina

garnet solid electrolytes are one of the most promising electrolytes for solid-state ***,Li_(2)CO_(3) is a critical issue that hinders the practical application of garnet-based solid-state lithium-ion *** are two sources of Li_(2)CO_(3) *** main one is the aging of garnet electrolytes in the *** electrolytes can react with H_(2)O and CO_(2) in the air to form Li_(2)CO_(3),which reduces ion conductivity,increases electrode/garnet electrolyte interface resistance,and deteriorates the electrochemical performance of the *** strategies,such as elemental doping,grain boundary manipulation,and interface engineering,have been suggested to address these *** other is the passivation layer(Li_(2)CO_(3),Li_3n,LiOH,Li_(2)O) formed on the surface of the lithium foil after long-term storage,which is ignored by most *** better understand the current strategies and future trends to address the Li_(2)CO_(3) problem,this perspective provides a systematic review of journals published in this field from 2020-2023.

关键词： Solid-state batteries garnet electrolytes Air stability Interface engineering Lithium foil contamination

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Universal insertion of molecules in ionic compounds under pressure

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national Science Review 2024年第1期11卷 120-128页

作者： Feng Peng Yanming ma Chris J.Pickard Hanyu Liu maosheng Miao College of Physics and Electronic Information Luoyang Normal University Department of Chemistry and Biochemistry California State University Northridge State Key Laboratory of Superhard materials & Key Laboratory of material Simulation Methods and Software of Ministry of Education College of Physics Jilin University International Center of Future Science Jilin University Department of materials Science & Metallurgy University of Cambridge Advanced Institute for materials Research Tohoku University Department of Earth Science University of California Santa Barbara

Using first-principles calculations and crystal structure search methods, we found that many covalently bonded molecules such as H2, n2, CO2, nH3, H2O and CH4may react with naC l, a prototype ionic solid,and form stable compounds under pressure while retaining their molecular structure. These molecules,despite whether they are homonuclear or heteronuclear, polar or non-polar, small or large, do not show strong chemical interactions with surrounding na and Cl ions. In contrast, the most stable molecule among all examples, n2, is found to transform into cyclo-n5-anions while reacting with naC l under high pressures. It provides a new route to synthesize pentazolates, which are promising green energy materials with high energy density. Our work demonstrates a unique and universal hybridization propensity of covalently bonded molecules and solid compounds under pressure. This surprising miscibility suggests possible mixing regions between the molecular and rock layers in the interiors of large planets.

关键词： molecule-solid hybrid materials high-pressure crystal structure prediction density functional theory planet interior

EFFICIEnT SPECTRAL METHODS FOR EIgEnVALUE PROBLEMS OF THE InTEgRAL FRACTIOnAL LAPLACIAn OnABALLOFAnYDIMEnSIOn

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Journal of Computational mathematics 2024年第4期42卷 1032-1062页

作者： Suna ma Huiyuan Li Zhimin Zhang Hu Chen Lizhen Chen College of Science Nanjing University of Posts and TelecommunicationsNanjingChina State Key Laboratory of Computer Science/Laboratory of Parallel Computing Institute of SoftwareChinese Academy of SciencesBeijingChina Department of mathematics Wayne State UniversityDetroitUSA School of mathematical Sciences Ocean University of ChinaQingdaoChina Beijing Computational Science Research Center BeijingChina

An efficient spectral-galerkin method for eigenvalue problems of the integral fractional Laplacian on a unit ball of any dimension is proposed in this *** symmetric positive definite linear system is retained explicitly which plays an important role in the numerical *** a sharp estimate on the algebraic system's condition number is established which behaves as n4s with respect to the polynomial degree n,where 2s is the fractional derivative *** regularity estimate of solutions to source problems of the fractional Laplacian in arbitrary dimensions is firstly investigated in weighted Sobolev *** the regularity of eigenfunctions of the fractional Laplacian eigenvalue problem is readily ***,rigorous error estimates of the eigenvalues and eigenvectors are *** experiments are presented to demonstrate the accuracy and efficiency and to validate the theoretical results.

关键词： Integral fractional Laplacian Spectral method Eigenvalue problem Regularity analysis Error estimate

Cross-linkedα-amylase aggregates on Fe3O4 magnetic nanoparticles modified with polydopamine/polyethyleneimine for efficient hydrolysis of starch

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Particuology 2024年第7期90卷 98-105页

作者： Jiandong Cui Xiuming Tang Qingqing ma Yuyan Chang Qunli Zhang Shiru Jia State Key Laboratory of Food nutrition and Safety Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationTianjin University of Science and TechnologyTianjin 300457China Key Laboratory of Biomass Chemical Engineering of Ministry of Education Zhejiang UniversityHangzhou 310027China

In this workα-amylase was immobilized on magnetic Fe3O4 nanoparticles with polyethylenimine(PEI)/polydopamine(PDA)coating or 3-aminopropyl triethoxysilane(APTES)for the first time via adsorption–precipitation–*** with the freeα-amylase,the resultant magnetic cross-linkedα-amylase aggregates(PEI/PDA-M-CLEAs and n-M-CLEAs)exhibited excellent thermal and storage stability as well as pH *** storage at 25°C for 60 days,freeα-amylase only retained 60%of its initial activity,while PEI/PDA-M-CLEAs and n-M-CLEAs retained 80%and 78%of their initial activities,***,n-M-CLEAs and PEI/PDA-M-CLEAs showed good *** 6 repeated uses,PEI/PDA-M-CLEAs and n-M-CLEAs still maintained 65%and 62%of their initial activities,***,PEI/PDA-M-CLEAs and n-M-CLEAs exhibited higher starch hydrolysis efficiency than freeα-*** maximum dextrose equivalent(DE)values of starch hydrolysis by PEI/PDA-M-CLEAs and n-M-CLEAs reached 29.24%and 28.79%within 90 min,***,the maximum DE values of starch hydrolysis by the freeα-amylase was only 27.89%even in 150 *** magnetic cross-linkedα-amylase aggregates could be introduced as effective biocatalyst for industrial applications in production of maltose syrups.

关键词： α-amylase magnetic nanoparticles Functional modification magnetic cross-linked enzyme aggregates Hydrolysis of starch

Effects of Lactobacillus paracasei n1115 on gut microbial imbalance and liver function in patients with hepatitis B-related cirrhosis

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World Journal of gastroenterology 2024年第11期30卷 1556-1571页

作者： Yan-Chao Hu Xiang-Chun Ding Hui-Juan Liu Wan-Long ma Xue-Yan Feng Li-na ma Department of Infectious Disease General Hospital of Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina Infectious Disease Clinical Research Center of ningxia Yinchuan 750004Ningxia Hui Autonomous RegionChina

BACKgROUnD Hepatitis B cirrhosis(HBC)is a chronic disease characterized by irreversible diffuse liver damage and aggravated by intestinal microbial imbalance and metabolic *** the relationship between certain single probiotics and HBC has been explored,the impact of the complex ready-to-eat Lactobacillus paracasei n1115(LP n1115)supplement on patients with HBC has not been *** To compare the changes in the microbiota,inflammatory factor levels,and liver function before and after probiotic treatment in HBC *** This study included 160 HBC patients diagnosed at the general Hospital of ningxia Medical University between October 2018 and December *** were randomly divided into an intervention group that received LP n1115 supplementation and routine treatment and a control group that received routine treatment *** samples were collected at the onset and conclusion of the 12-wk intervention *** structure of the intestinal microbiota and the levels of serological indicators,such as liver function and inflammatory factors,were *** Following LP n1115 intervention,the intestinal microbial diversity significantly increased in the intervention group(Pnd the structure of the intestinal microbiota was characterized by an increase in the proportions of probiotic microbes and a reduction in harmful ***,the intervention group demonstrated notable improvements in liver function indices and significantly lower levels of inflammatory factors(PnCLUSIOn LP n1115 is a promising treatment for ameliorating intestinal microbial imbalance in HBC patients by modulating the structure of the intestinal microbiota,improving liver function,and reducing inflammatory factor levels.

关键词： Hepatitis B cirrhosis n1115 ready-to-eat lactobacillus Inflammation Liver function Lachnospiraceae incertae sedis Probiotic

The novel Long QT Syndrome Type 2-associated F129I Mutation in the KCnH2 gene Significantly Affects IKr Through the hERg1 Homomeric and Heteromeric Potassium Channels

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Cardiology Discovery 2024年第2期4卷 174-182页

作者： Li Feng Kejuan ma Xin Li nian Liu Deyong Long Changsheng ma Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityNational Clinical Research Center for Cardiovascular DiseasesBeijing 100029China Community Health Service Center of Beijing.n.mal University Beijing 100875China.

Objective:The long QT syndrome type 2 is caused by the loss-of-function mutations in the KCnH2 gene,which encodes hERg1,the voltage-gated potassium *** hERg1 channels conduct rapid delayed rectifier K^(+)currents(I_(Kr))in the human cardiac ***2 encodes 2 main isoforms-hERg1a and hERg1b,which assemble to form the homomeric or heteromeric hERg1 ***,the functional characteristics of the heteromeric hERg1 channels in long QT syndrome type 2 are not *** this study,a novel mutation in the n-terminus of hERg1a(F129l)was identified in a proband of long QT syndrome type *** purpose of this study was to identify the electrophysiological change of homomeric and heteromeric hERg1 channels with ***:Candidate genes were screened by direct sequencing.F129l-hERg1a was cloned in the pcDnA3.1 vector by site-directed ***,the wild-type(WT)hERg1a and/or F129l-hERg1a were transiently expressed in the HEK293 cells with or without hERg1b *** expression levels of the transgenes,cellular distribution of hERg1a and hERg1b,and the electrophysiological features of the homomeric and the heteromeric hERg1 channels with the WT-hERg1a or F129l-hERg1a were analyzed using whole-cell patch-clamp electrophysiology,western blotting,and immunofluorescence ***:The proband was clinically diagnosed with long QT syndrome type 2 and carried a heterozygous mutation c.385T>A(F1291)in the KCnH2 *** study proved that the F129l substitution in hERg1a significantly decreased I_(Kr) in both the homomeric and heteromeric hERg1channels by 86%and 70%,respectively(WT-hERg1a(54.88±18.74)pA/pF vs.F129l-hERg1a(7.34±1.90)pA/pF,Pg1a/hERg1b(89.92±24.51)pA/pF vs.F129l-hERg1a/hERg1b(26.54±9.83)pA/pF,Pge dependence of I_(Kr) activation(V_(1/2) and k)was not affected by the mutation in both the homomeric and heteromeric hERg1 *** peak current densities and the kinetic charact

关键词： Long QT syndrome Arrhythmia lon channels hERg