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Childhood malaria in the Niger delta area of Nigeria:mothers/care givers'perception,definition and treatment practices

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Asian Pacific Journal of Tropical Medicine 2009年第3期2卷 52-58页

作者： Idogun E.Sylvester Airauhi l.u Department of Chemical Pathology University of Benin Teaching HospitalBenin City Department of Medical Microbiology Biology University of Benin Teaching HospitalBenin City

Objective:The objective of the study was to evaluate mothers/care givers perception of malaria,their treatment practices and the effects on the outcome of ***:Four hundred and sixty children were enrolled and their mothers/care givers *** children were screened for malaria parasitaemia and there after,blood specimens were obtained for biochemical and haematological evaluation from those children who met the criteria and tested positive to *** *** cell volume,electrolytes,urea, creatinine,plasma glucose,and serum bilirubin were ***:A total of 460 children were studied, 233(50.7%) males and 227(49.3%) *** malaria cases were 112(24.3%) and severe malaria 348(75.7%).Those who presented early 106(23.0%) and those who presented late 354(77.0%).Perception and definition of malaria as well as the treatment seeking behaviors vary significantly with the level of education of the mothers and care *** without formal education 68(51.9%) wrongly perceived that the etiology of malaria can only be diagnosed by native doctors compared to those with primary six education 61 (26.5%) and junior secondary education 10(10.1%).Only 43(9.3%) gave the correct dose of chloroquine syrup to their sick children,while 32(7.0%) gave at sub optimal ***:Wrong perception of malaria especially the complicated malaria and wrong treatment practices are major contributory factors to the high mortality and morbidity of malaria in *** is therefore a need for health education to correct the wrong ideas about the cause and treatment practices of malaria as part of malaria control programme.

关键词： Childhood malaria Mothers/Caregivers Perception and treatment practices Nigeria

Drift perturbation of subordinate Brownian motions with Gaussian component

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Science China Mathematics 2016年第2期59卷 239-260页

作者： CHEN Zhen-Qing DOu xiaoman Department of Mathematics University of Washington Department of Mathematical Sciences Tsinghua University

let d ≥ 1 and Z be a subordinate Brownian motion on R^d with infinitesimal generator ? + ψ(?),where ψ is the laplace exponent of a one-dimensional non-decreasing l′evy process(called subordinator). We establish the existence and uniqueness of fundamental solution(also called heat kernel) pb(t, x, y) for non-local operator l^b= ? + ψ(?) + b ?, where Rb is an Rd-valued function in Kato class K_(d,1). We show that p^b(t, x, y)is jointly continuous and derive its sharp two-sided estimates. The kernel pb(t, x, y) determines a conservative Feller process X. We further show that the law of X is the unique solution of the martingale problem for(l^b, C_c~∞(R^d)) and X is a weak solution of Xt = X0+ Zt + integral from n=0 to t(b(Xs)ds, t ≥ 0).Moreover, we prove that the above stochastic differential equation has a unique weak solution.

关键词： subordinate Brownian motion heat kernel Kato class gradient perturbation Feller process l^vysystem martingale problem stochastic differential equation

The Dirac Equation on Metrics of Eguchi-Hanson Type Ⅱ with Negative Constant Scalar Curvature

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Chinese Annals of Mathematics,Series B 2023年第6期44卷 893-912页

作者： Junwen CHEN xiaoman XuE Xiao ZHANG School of Physical Science and Technology Guangxi UniversityNanning 530004GuangxiChina Guangxi Center for Mathematical Research Guangxi UniversityNanning 530004GuangxiChina Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

On metrics of Eguchi-Hanson type Ⅱ with negative constant Ricci curvatures,the authors show that there is no nontrivial Killing *** metrics of Eguchi-Hanson type Ⅱ with negative constant scalar curvature,they show that there is no nontrivial l p eigenspinor for 0lue has nontrivial real part,and no nontrivial l^(2)eigenspinor if either the eigenvalue has trivial real part or the eigenvalue is real,the eigenspinor is isotropic and the parameterηin radial and angular equations for eigenspinors is *** also solve harmonic spinors and eigenspinors explicitly on metrics of EguchiHanson type Ⅱ with certain special potentials.

关键词： Metric of Eguchi-Hanson type II Killing spinor Eigenspinor

THE K-THEORY AND THE ClASSIFICATION OF THE IRRATIONAl ROTATION GROuPOID C^(*)-AlGEBRAS

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Chinese Annals of Mathematics,Series B 1997年第2期18卷 257-264页

作者： YAN SHAOZONG CHEN xiaoman Xu SHENGZHI Institute of Mathematics Fudan UniversityShanghsi 200433China

The authors determine the invariants of the irrational rotationC^(*)-algebras over thel-shaped domain in C^(2) by the maximal radical series.

关键词： K-group Maximal radical series C^(*)-algebra

On the Equi-nuclearity of Roe Algebras of Metric Spaces

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Chinese Annals of Mathematics,Series B 2010年第4期31卷 519-528页

作者： xiaoman CHEN Benyin Fu Qin WANG School of Mathematical Sciences Fudan University Shanghai 200433 China Department of Applied Mathematics Donghua University Shanghai 200051 China

The authors define the equi-nuclearity of uniform Roe algebras of a family of metric spaces. For a discrete metric space X with bounded geometry which is covered by a family of subspaces {Xi}i=1^∞, if {C^＊（Xi）}i=1^∞ are equi-nuclear and under some proper gluing conditions, it is proved that C＊（X） is nuclear. Furthermore, it is claimed that in general, the coarse Roe algebra C^＊（X） is not nuclear.

关键词： Nuclear C^*-algebra uniform Roe algebra Equi-nuclear uniform Roe algebra

Relative equivariant coarse index and relative l^(2)-index

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Science China Mathematics 2023年第7期66卷 1449-1472页

作者： xiaoman Chen Yanlin l.u Dapeng Zhou School of Mathematical Sciences Fudan UniversityShanghai 200433China School of Statistics and Information Shanghai University of International Business and EconomicsShanghai 201620China Research Center for Operator Algebras East China Normal UniversityShanghai 200062China

In this paper,we define a relative equivariant coarse index for proper actions and a relative l^(2)-*** derive a relative equivariant coarse index theorem connecting the relative equivariant coarse index with the localized equivariant coarse ***,we present a cal.ulation formula on the relative l^(2)-index and provide a relative l^(2)-index *** work is an expansion of the relative index theory which reflects the difference between two manifolds.

关键词： relative equivariant coarse index relative l^(2)-index regular cover Roe algebra

Construction of algal-bacterial consortia using green microalgae Chlorella vulgaris and As(Ⅲ)-oxidizing bacteria:As tolerance and metabolomic profiling

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Journal of Environmental Sciences 2024年第5期139卷 258-266页

作者： xiaoman He Guobing lin Jiayuan Zeng Zhaoguang Yang lin Wang College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key laboratory of Hunan Province for Water Environment and Agricul.ure Product Safety Central South UniversityChangsha 410083China

Bioremediation became a promising technology to resolve arsenic(As)contamination in aquatic *** monocul.ure such as microalgae or bacteria was sensitive to environmental disturbance and vulnerable to contamination,green microalgae Chlorella vulgaris and arsenite(As(Ⅲ))-oxidizing bacteria Pseudomonas ***11 were co-cul.ured to construct algal-bacterial consortia in the current *** effects of algae-bacteria(A:B)ratio and exposure As(Ⅲ)concentration on algal growth,As speciation and metabolomic profile were *** growth arrested when treated with 100 mg/l As(Ⅲ)without the co-cul.ured *** contrast,co-cul.ured with strain SMS11 significantly enhanced As tolerance in *** especially with A:B ratio of 1:*** the As(Ⅲ)in cul.ure media of the consortia were oxidized into As(Ⅴ)on day *** of As was observed on day *** 1% and 0.5% of total As were converted into dimethylarsinic acid(DMA)after 21days cultivation when the initial concentrations of As(Ⅲ)were 1 and 10 mg/l,*** analysis was further performed to reveal the response of consortia metabolites to external As(Ⅲ).The enriched metabolomic pathways were associated with carbohydrate,amino acid and energy *** acid cycle and glyoxylate and dicarboxylate metabolism were upregulated under As stress due to their biological functions on alleviating oxidative stress and protecting *** carbohydrate and amino acid metabolisms provided precursors and potential substrates for energy production and cell protection under abiotic *** of the pathways relevant to carbohydrate or amino acid metabolism were triggered by energy requirement.

关键词： Microalgae Algal-bacterial consortia As(Ⅲ)-oxidizing bacteria Metabolomics Energy metabolism

Synergistic effect of Co and Co_(6)Mo_(6)C for electroreduction of nitrate to ammonia on Co-MOF derived Co_(6)Mo_(6)C/Co/NC

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Nano Research 2024年第7期17卷 5807-5816页

作者： Xinyan Wang Yue Cao Yan Hai xiaoman li Min luo State Key laboratory of High-efficiency utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China

Electrocatalytic nitrate reduction reaction(e-NO_(3)RR)offers a promising alternative method for nitrogen cycling and ammonia(NH3)production under ambient ***,the method is still in the dilemma of lowering the reaction overpotential and increasing the reaction *** successfully developed the composition-adjustable Co_(6)Mo_(6)C/Co/N-doped carbon(NC)catalysts by in situ carbonization of Co-based metal-organic framework(MOF)with the constrained phosphomolybdic *** adjusting the ratio of Co0 and Co_(6)Mo_(6)C,Co_(6)Mo_(6)C/Co/NC-3 could satisfy both NO_(3)−conversion at low potential and NH_(x)hydrogenation,and synthesize ammonia efficiently through the synergistic effect of Co0 and Co_(6)Mo_(6)*** achieved an ammonia yield rate as 1233.2μg·h^(−1)·mgcat^(−1)and Faradaic efficiency of NH4+93.6%at−0.33 V *** hydrogen electrode(RHE).Importantly,density functional theory(DFT)cal.ulations and experimental results have demonstrated for the first time the excellent adsorption of nitrite(NO_(2)^(−))by the Mo sites of Co_(6)Mo_(6)C during e-NO_(3)RR,avoiding the undesirable accumulation of NO_(2)^(−).

关键词： synergistic effect nitrate electroreduction Co_(6)Mo_(6)C ammonia synthesis

Antifungal properties and mechanisms of three volatile aldehydes(octanal,nonanal and decanal)on Aspergil.us flavus

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Grain & Oil Science and Technology 2021年第3期4卷 131-140页

作者： Qian li xiaoman Zhu Yanli Xie Jingmeng liang Henan Key laboratory of Cereal and Oil Food Safety Inspection and Control College of Food Science and EngineeringHenan University of TechnologyZhengzhou 450001China

The harmof Aspergil.us flavus(***)and aflatoxin is a severe food safety problemworldwide,which causes huge economic losses every ***,it is urgent to control the growth of *** and the biosynthesis of ***-derived natural compounds are superior to synthetic fungicide in inhibiting the growth of *** benefiting from their high safety to the environment,humans and stock,and low *** study aimed to evaluate the antifungal effects and potential antifungal mechanisms of three plant-derived compounds(octanal,nonanal and decanal)against *** determined the minimum inhibitory concentrations(MICs)and action mechanism of the three volatile aldehydes on *** and also performed calcofluor white(CW)staining for visualizing the distribution of *** respiration metabolism and the pathogenicity on maize kernels were also carried out to evaluate the efficacy of the three volatile aldehydes on the growth of *** results showed that the three volatile aldehydes could inhibit the germination of spores and mycelial growth of ***,the MICs on spores and mycelia were:octanal(1.0 and 0.5μl/ml),nonanal(0.5 and 2.0μl/ml),and decanal(1 and 5μl/ml).The three volatile aldehydes could strongly damage the integrity of both the cell wall and the cell membrane of ***,they could decrease the content of total lipid and inhibit respiration metabolism of *** *** of in vitro antifungal test showed that all the three volatile aldehydes could effectively prevent the growth of *** on maize *** study revealed that octanal,nonanal and decanal could effectively inhibit the growth of *** both in cul.ure medium and on maize kernels to different *** results confirmed that the plant-derived compounds could be developed into promising antifungal agents applied in the preservation of *** study provides a theoretical basis for the research and application of potential antifungal agents.

关键词： Aspergil.us flavus Octanal Nonanal Decanal Antifungal mechanism