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Advances in Applied mathematics and Mechanics 2012年第4期4卷 439-453页

作者： zhonghua ma Dejun Liu Hui Li Xinsheng Gao College of Geophysics and Information Engineering China University of Petroleum18 Fuxue RoadChangping DistrictBeijing 102249China LandOcean Energy Services Co. LtdBeijing 100084China

A novel,highly efficient and accurate adaptive higher-order finite element method(hp-FEM)is used to simulate a multi-frequency resistivity loggingwhile-drilling(LWD)tool response in a borehole *** in this study are the vector expression of maxwell’s equations,three kinds of boundary conditions,stability weak formulation of maxwell’s equations,and automatic hpadaptivity *** new hp-FEM can select optimal refinement and calculation strategies based on the practical formation model and error *** experiments show that the new hp-FEM has an exponential convergence rate in terms of relative error in a user-prescribed quantity of interest against the degrees of freedom,which provides more accurate results than those obtained using the adaptive *** numerical results illustrate the high efficiency and accuracy of the method at a given LWD tool structure and parameters in different physical models,which further confirm the accuracy of the results using the Hermes library(http://***/hermes)with a multi-frequency resistivity LWD tool response in a borehole environment.

关键词： Resistivity logging-while-drilling higher-order finite element method adaptive exponential convergence numerical simulation

Multiple functions of SWI/SNF chromatin remodeling complex in plant-pathogen interactions

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Stress Biology 2021年第1期1卷 215-229页

作者： Yunqing Jian Won-Bo Shim zhonghua ma State Key Laboratory of Rice Biology and Key Laboratory of Molecular Biology of Crop Pathogens and InsectsInstitute of BiotechnologyZhejiang UniversityHangzhouChina Department of Plant Pathology and Microbiology Texas A&M UniversityCollege StationTXUSA

The SWI/SNF chromatin remodeling complex utilizes the energy of ATP hydrolysis to facilitate chromatin access and plays essential roles in DNA-based *** in animals,plants and fungi have uncovered sophisticated regulatory mechanisms of this complex that govern development and various stress *** this review,we summarize the composition of SWI/SNF complex in eukaryotes and discuss multiple functions of the SWI/SNF complex in regulating gene transcription,mRNA splicing,and DNA damage *** review further highlights the importance of SWI/SNF complex in regulating plant immunity responses and fungal ***,the potentials in exploiting chromatin remodeling for management of crop disease are presented.

关键词： Chromatin remodeling SWI/SNF complex Transcription Splicing DNA damage repair Plant-pathogen interaction

Dual synergetic catalytic effects boost hydrogen electric oxidation performance of Pd/W_(18)O_(49)

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Nano Research 2021年第7期14卷 2441-2450页

作者： Lingxin Peng Han Tian Xiangzhi Cui Liang Su Ge Meng zhonghua ma Shaowen Cao Jianlin Shi State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemistry and materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China School of Chemistry and Chemical Engineering Huazhong University of Science and Technology(HUST)Wuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer materials&College of materials Science and Engineering Donghua UniversityShanghai 201620China State Key Laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Developing anode catalysts of substantially enhanced activity for hydrogen oxidation reaction(HOR)and anti-CO poisoning performance is of great importance for the application of proton exchange membrane fuel cells(PEMFCs).Herein,we report Pd cluster in situ decorated urchin-like W_(18)O_(49)(WO_(2.72))electrocatalysts by a photo-reduction method for high performance *** synthesized Pd-WO_(2.72)-L composite of low loading amount of 0.44 wt.%Pd by Xenon light reduction exhibits markedly high HOR catalytic activity and stability in 0.5 M H_(2)SO_(4),and the specific HOR current density and mass activity of Pd-WO_(2.72)-L are~1.5 and~80 times those of 20 wt.%Pt/C catalyst,***,excellent anti-CO poisoning ability has also been *** excellent HOR activity and anti-CO poisoning performance of Pd-WO_(2.72)-L have been discussed mainly in terms of the dual synergetic catalytic effects between Pd and WO_(2.72):Pd activation to Pd^(δ+)by the electron transfer from Pd to W promotes the hydrogen adsorption and activation to H*species,which results in largely elevated HOR activity;Pd degradation due to the CO poisoning is effectively prevented by WO_(2.72),which is responsible for the excellent CO-tolerance performance.

关键词： hydrogen oxygen reaction tungsten oxide photo-reduction method synergistic effect CO tolerance catalyst

In Situ Electrochemical Mn(Ⅲ)/Mn(Ⅳ) Generation of Mn(Ⅱ)O Electrocatalysts for High-Performance Oxygen Reduction

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Nano-Micro Letters 2020年第11期12卷 255-268页

作者： Han Tian Liming Zeng Yifan Huang zhonghua ma Ge Meng Lingxin Peng Chang Chen Xiangzhi Cui Jianlin Shi State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Chemistry and materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310021People’s Republic of China College of Chemistry and Molecular Sciences Hubei Key Lab of Electrochemical Power SourcesWuhan UniversityWuhan 430072People’s Republic of China Wuhan University of Science and Technology Wuhan 430081People’s Republic of China College of material Science and Engineering Donghua UniversityShanghai 201620People’s Republic of China

Among various earth-abundant and noble metal-free catalysts for oxygen reduction reaction(ORR),manganese-based oxides are promising candidates owing to the rich variety of manganese ***,an extremely facile method for the synthesis of cubic and orthorhombic phase coexisting Mn(Ⅱ)O electrocatalyst as an efficient ORR catalyst was *** obtained MnO electrocatalyst with oxygen vacancies shows a significantly elevated ORR catalytic activity with a half-wave potential(E1/2) of as high as 0.895 V,in comparison with that of commercial Pt/C(E1/2=0.877 V).More impressively,the MnO electrocatalyst exhibits a marked activity enhancement after test under a constant applied potential for 1000 s thanks to the in situ generation and stable presence of high-valence manganese species(Mn^3+ and Mn^4+) during the electrochemical process,initiating a synergetic catalytic effect with oxygen vacancies,which is proved to largely accelerate the adsorption and reduction of O_2 molecules favoring the ORR activity *** an excellent ORR catalytic performance of this MnO electrocatalyst is applied in Zn-air battery,which shows an extra-high peak power density of 63.2 mW cm^-2 in comparison with that(47.4 m W cm^-2) of commercial Pt/C under identical test conditions.

关键词： Zinc-air battery In situ generation High-valence manganese species Synergetic catalytic effect

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Dietary emodin alleviates lipopolysaccharide-induced intestinal mucosal barrier injury by regulating gut microbiota in piglets

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Animal Nutrition 2023年第3期14卷 152-162页

作者： Wenjuan Xun Mengyao Ji zhonghua ma Tanjie Deng Wen Yang Guanyu Hou Liguang Shi Ting Cao College of Animal Science and Technology Hainan UniversityHaikou570228China Tropical Crops Genetic Resources Institute Chinese Academy of Tropical Agricultural SciencesHaikou571100China

This study was to determine the effects of dietary emodin(ED)on the intestinal mucosal barrier,nuclear factor kappa-B(NF-κB)pathways,and gut microbial flora in lipopolysaccharide(LPS)-induced ***-four weaned piglets were chosen and 4 treatments were created by randomly distributing piglets into CON,ED,LPS,and ED_LPS *** were done in a 2×2 factorial arrangement and maintained for 21 *** treatment(a basal diet or 300 mg/kg ED)and immunological challenge(LPS or sterile saline)were 2 major *** injections of LPS or sterilized saline were given to piglets on d *** hours after the LPS challenge,all piglets were euthanized for sample collection and *** results showed that piglets of the ED_LPS group had higher(Pma D-lactate and diamine oxidase(DAO)than the LPS ***,ED inhibited(Pmalonaldehyde level(Pmatory cytokine genes(IL-6,IL-1β,and TNF-a)were significantly reduced(P<0.05),and the mRNA levels of antioxidant enzyme genes(GPX-1,SOD2 and CAT),as well as protein and mRNA levels of tight junction proteins(occludin,claudin-1,and ZO-1),were also significantly increased(P<0.05)by ED addition in LPS-induced ***,ED supplementation significantly decreased the LPS-induced protein levels of cyclooxygenase-2 and phosphorylation levels of NF-κB p65and IκBa in jejunal *** had a significant effect on the composition of gut microbial flora at various taxonomic positions as indicated by 16S RNA *** acetic acid,isobutyric acid,valeric acid,and isovaleric acid concentrations in the cecum were also increased by ED addition in pigs(P<0.05).Furthermore,the correlation analysis revealed that some intestinal microbiota had a potential relationship with jejunal

关键词： Emodin Piglet Intestinal barrier function Nuclear factor kappa-B signalling Gut microbiota Short-chain fatty acid

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The Order Quantity Decision of Newsboy Retailer with Financing

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Journal of Systems Science and Information 2014年第4期2卷 358-365页

作者： zhonghua ma Shanghai maritime University School of management & Economic

We analyze the retailer’s optimal order with capital constraint under stochastic *** consider the impact of external financing, that is inventory financing, and the internal financing,that is trade credit, on the order strategy of retailer separately. We establish revenue model of retailer and solve, and give revenue of retailer and supplier respectively. Finally, we give the impact of own funds on the retailer’s order quantity, retailer’s revenue, supplier’s revenue, as well as the impact on the overall revenue gains of the supply chain. And some analysis and statement are also given in the end.

关键词： inventory financing trade credit newsboy model

Prevention of Mother-To-Child Transmission of HIV-China,2011-2020

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China CDC weekly 2021年第48期3卷 1018-1021页

作者： Xiaoyan Wang Qian Wang Changhe Wang Tong Zhang Zhixin Li zhonghua ma Ailing Wang National Center for Women and Children’s Health China CDCBeijingChina Capital Institute of Pediatrics BeijingChina

ABSTRACT Introduction:Prevention of mother-to-child transmission(PMTCT)of human immunodeficiency virus(HIV)is a global health focus in most parts of the *** World Health Organization(WHO)launched the dual Elimination of Mother-to-Child Transmission(EMTCT)of HIV and syphilis initiative and released global guidance on criteria and processes for validation of the EMTCT in *** purpose of this report was to analyze the key validation indicators of EMTCT of HIV in China from 2011 to 2020 and to provide relevant basis information for the implementation of EMTCT action in China.

关键词： mother EMT HIV

Response Characteristics of Climate in the Shiyang River Basin to Global Warming

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Journal of Landscape Research 2016年第3期8卷 65-69页

作者： ma zhonghua CHANG Zhaofeng Wuwei Meteorological Bureau Gansu Desert Control Research Institute

Meteorological data of 5 weather stations in the Shiyang River Basin on the eastern section of Hexi Corridor from 1961 to 2014 were analyzed using statistical analysis techniques such as linear trend and variance signifi cance test. The results showed that as the low temperature rose generally, temperature in stations nearby desert showed higher increase rate; annual extreme maximum temperature in stations nearby mountains showed more signifi cant increase, and annual extreme minimum temperature in stations nearby desert showed more signifi cant increase, and the increase tendency of extreme minimum temperature was more obvious than that of extreme maximum temperature; annual extreme maximum temperature in stations in desert showed higher instability; instability of annual extreme minimum temperature in all sampling points increased, and showed no obvious regularity between desert and mountain.

关键词： Global warming Climate Characteristics Desert the Shiyang River Basin

Fusarium-produced vitamin B6 promotes the evasion of soybean resistance by Phytophthora sojae

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Journal of Integrative Plant Biology 2023年第9期65卷 2204-2217页

作者： Shuchen Wang Xiaoyi Zhang Zhichao Zhang Yun Chen Qing Tian Dandan Zeng Miao Xu Yan Wang Suomeng Dong zhonghua ma Yuanchao Wang Xiaobo Zheng Wenwu Ye Department of Plant Pathology Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of Plant Immunity Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of Soybean Disease and Pest Control(Ministry of Agriculture and Rural Affairs) Nanjing Agricultural UniversityNanjing 210095China Key Laboratory of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058China

Plants can be infected by multiple pathogens concurrently in natural systems. However,pathogen–pathogen interactions have rarely been studied. In addition to the oomycete Phytophthora sojae, fungi such as Fusarium spp. also cause soybean root rot. In a 3-year field investigation, we discovered that P. sojae and Fusarium spp. frequently coexisted in diseased soybean roots. Out of 336 P. sojae–soybean–Fusarium combinations,more than 80% aggravated disease. Different Fusarium species all enhanced P. sojae infection when co-inoculated on soybean. Treatment with Fusarium secreted non-proteinaceous metabolites had an effect equal to the direct pathogen coinoculation. By screening a Fusarium graminearum mutant library, we identified Fusarium promoting factor of Phytophthora sojae infection 1(Fpp1),encoding a zinc alcohol dehydrogenase. Fpp1 is functionally conserved in Fusarium and contributes to metabolite-mediated infection promotion, in which vitamin B6(VB6) produced by Fusarium is key. Transcriptional and functional analyses revealed that Fpp1 regulates two VB6 metabolism genes, and VB6 suppresses expression of soybean disease resistance-related genes. These results reveal that co-infection with Fusarium promotes loss of P. sojae resistance in soybean, information that will inform the sustainable use of diseaseresistant crop varieties and provide new strategies to control soybean root rot.

关键词： fungal metabolites pathogen–host interaction Phytophthora sojae soybean root rot vitamin B6

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Bacterial-fungal interactions under agricultural settings:from physical to chemical interactions

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Stress Biology 2022年第1期2卷 411-427页

作者： Yaqi Zhou Hongkai Wang Sunde Xu Kai Liu Hao Qi Mengcen Wang Xiaoyulong Chen Gabriele Berg zhonghua ma Tomislav Cernava Yun Chen State Key Laboratory of Rice Biology and Key Laboratory of Molecular Biology of Crop Pathogens and InsectsInstitute of BiotechnologyZhejiang University866 Yuhangtang RoadHangzhou 310058China Key Laboratory of Molecular Biology of Crop Pathogens and Insects Ministry of AgricultureInstitute of Pesticide and Environmental ToxicologyZhejiang UniversityHangzhouChina Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of EducationGuizhou UniversityGuiyang 550025China Institute of Environmental Biotechnology Graz University of Technology8010 GrazAustria Leibniz-Institute for Agricultural Engineering and Bioeconomy PotsdamGermany University of Potsdam PotsdamGermany.

Bacteria and fungi are dominant members of environmental *** bacterial-fungal interactions(BFIs)and their mutual regulation are important factors for ecosystem functioning and *** interactions can be highly dynamic,and often require spatiotemporally resolved assessments to understand the interplay which ranges from antagonism to *** of these interactions are still poorly understood,especially in terms of the underlying chemical and molecular interplay,which is crucial for inter-kingdom communication and *** are highly relevant under agricultural settings;they can be determinative for crop *** our knowledge related to mechanisms underpinning the interactions between bacteria and fungi will provide an extended basis for biological control of pests and pathogens in ***,it will facilitate a better understanding of complex microbial community networks that commonly occur in *** will allow us to determine factors that are crucial for community assembly under different environmental conditions and pave the way for constructing synthetic communities for various biotechnological ***,we summarize the current advances in the field of BFIs with an emphasis on agriculture.

关键词： Bacterial-fungal interactions Biological control Synthetic communities Secondary metabolites