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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

Optimum conditions for the formation of Al_(13) polymer and active chlorine in electrolysis process with Ti/RuO_2-TiO_2 anodes

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Journal of Environmental Sciences 2012年第2期24卷 297-302页

作者： Chengzhi Hu huijuan l.u Jiuhui Qu State Key laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

A polyaluminum containing a high concentration of Al13 polymer and active chlorine（PACC） was successfully synthesized by a new electrochemical reactor using Ti/RuO2-TiO2 *** can potentially be used as a dual-function chemical reagent for water *** obtained results indicated that the formation of Al13 polymer and active chlorine,were the most active components in PACC responsible for coagulation and disinfection *** components were significantly influenced by electrolyte temperature,current density,and stirring *** was observed that high electrolyte temperature favored the formation of *** current density and stirring rate resulted in high current efficiency of chlorine evolution,thus favoring the generation of Al13 and active chlorine in *** the PACC（AlT = 0.5 mol/l,basicity = 2.3） was prepared at the optimum conditions by electrolysis process,the Al13 polymer and active chlorine in product reached above 70% of AlT and 4000 mg/l,*** the pilot scale experiment with raw polyaluminum chloride used as an electrolyte,PACC was successfully prepared and produced a high content of Al13 and active chlorine *** pilot scale experiment demonstrated a potential industrial approach of PACC preparation.

关键词： Al13 polymer coagulation pre-oxidation electrolysis water treatment

Multiplicity of Solutions of the Weighted p-laplacian with Isolated Singularity and Diffusion Suppressed by Convection

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Chinese Annals of Mathematics,Series B 2022年第5期43卷 643-658页

作者： liting YOu huijuan SONG Jingxue YIN School of Mathematical Sciences South China Normal UniversityGuangzhou 510631China School of Mathematics and Statistics Jiangxi Normal UniversityNanchang 330022China

In this paper,the authors study the multiplicity of solutions to the weighted p-laplacian with isolated singularity and diffusion suppressed by convection-div(|x|^(α)|■u|^(p-2)■u)+λ^(1)/|x|β|■u|^(p-2)■u·x=|x|^(γ)g(|x|)in Blsubject to nonlinear Robin boundary value condition|x|^(α)|■u|^(p-2)■u·n=A-ρu on■B,whereλ>0,B■RN(N≥2)is the unit ball centered at the origin,α>0,p>1,β∈R,γ>-N,g∈C(0,1])with g(0)>0,A∈R,ρ>0 and n is the unit outward *** same problem with diffusion promoted by convection,namely λ≤0,has already been discussed by the last two authors(Song-Yin(2012)),where the existence,nonexistence and classification of singularities for solutions are *** different from[Song,*** Yin,J.X.,Removable isolated singularities of solutions to the weighted p-laplacian with singular convection,***.,35,2012,1089-1100],in the present caseλ>0,namely the diffusion is suppressed by the convection,non-singular solutions are not only existent but also may be infinite which vary according only to the values of solutions at the isolated singular *** the same time,the singular solutions may exist only if the diffusion dominates the convection.

关键词： Weighted p-laplacian Multiplicity of solutions Isolated singularities Convection

Electrochemical incineration of dimethyl phthalate by anodic oxidation with boron-doped diamond electrode

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Journal of Environmental Sciences 2009年第10期21卷 1321-1328页

作者： HOu Yining Qu Jiuhui ZHAO Xu l.u huijuan State Key laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/l with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment batch reactor employing a boron-doped diamond （BDD） as anode. Electrolyses were carded out at constant current density （1.5-4.5 mA/cm^2）. Complete mineralization was always achieved owing to the great concentration of hydroxyl radical （-OH） generated at the BDD surface. The effects of pH, apparent current density and initial DMP concentration on the degradation rate of DMP, the specific charge required for its total mineralization and mineralization current efficiency were investigated systematically. The mineralization rate of DMP was found to be pH-independent and to increase with increasing applied current density. Results indicated that this electrochemical process was subjected, at least partially, to the mass transfer of organics onto the BDD surface. Kinetic analysis of the temporal change of DMP concentration during electrolysis determined by High Performance liquid Chromatography （HPlC） revealed that DMP decay under all tested conditions followed a pseudo first-order reaction. Aromatic intermediates and generated carboxylic acids were identified by Gas Chromatography- Mass Spectrometry （GC-MS） and a general pathway for the electrochemical incineration of DMP on BDD was proposed.

关键词： dimethyl phthalate anodic oxidation boron-doped diamond mineralization

Thrust Characteristics Analysis of long Primary Double Sided linear Induction Machine with Plate and Novel Shuttle Secondary Structure

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Transactions of Nanjing university of Aeronautics and Astronautics 2019年第5期36卷 693-702页

作者： l.u huijuan ZHANG Qian MA Jiefang School of Electrical Engineering Beijing Jiaotong University

The air-gap flux density formula and thrust expression of long primary double sided linear induction machine(DlIM)in the secondary motion reference frame are deduced by using the Maxwell equations ***,by analyzing the factors that affect the thrust ripple in the thrust expression,a shuttle type secondary structure of long primary DlIMs is proposed,and its thrust performances of the machine with different shuttle size combinations are simulated and compared with that of plate secondary long primary *** results show that the new secondary structure can suppress the thrust ripple and improve the stability of system acceleration.

关键词： linear induction machine long primary ripple end effect shuttle secondary

Wear of semi-solid rheocast SiC_p/Al metal matrix composites

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中国有色金属学会会刊：英文版 2010年第S3期20卷 852-856页

作者： u.A.CuRlE l.IVANCHEV Materials Science and Manufacturing Council for Scientific and Industrial Research(South Africa)

Rheocasting of plates in Al alloy 359 reinforced with SiC at 11%,27% and 50%(volume fractions) exhibits the capability of the council for scientific and industrial research-rheocasting system(CSIR-RCS) in rheo-processing and high pressure die casting of SiC metal matrix *** metal matrix consisting of nearly spherical proeutectic α(Al) globules was *** of fibrous eutectic silicon took place upon heat treatment of the as-cast metal matrix composites(MMCs).Hardness increases as the volume fractions of SiC *** rates of the MMCs in the F and T6 heat treatment conditions were assessed with a metallographic preparation *** is found that the 11% SiC MMC wear rate is higher on SiC abrasives compared with the 50% SiC MMC wear rate due to wear of the aluminum *** trend is reversed on diamond abrasives due to pull-out of the irregular shaped composite *** 50% SiC MMC suffers from composite particle fracture porosity after high pressure die casting(HPDC).

关键词： CSIR-RCS HPDC SiC F condition T6 condition wear rate hardness porosity

On the detection of closed orbits in time-dependent systems by using double-pulse lasers

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Communications in Theoretical Physics 2020年第9期72卷 111-117页

作者： S u Khan M l Du Institute of Theoretical Physics Chinese Academy of Sciences.Beijing 100190China university of Chinese Academy of Sciences Beijing100049China

In the photodetachment of atoms or negative ions by a double-pulse laser, the first pulse of the double-pulse laser generates waves and the delayed second pulse may detect them. The phenomenon of the excitation and detection of waves by a double-pulse laser can be used to identify the closed orbits in the system. We demonstrate this phenomenon with a negative hydrogen ion(H^-) by analyzing the total population excited by a double-pulse laser in a timedependent field for different physical parameters. By analyzing the total excited population using a double-pulse laser, we can uncover all the closed orbits existing in the system. We demonstrate that this can be realized by scanning the first pulse position and the time delay between the two pulses.

关键词： double-pulse laser detection of closed orbits photodetachment spectra time-dependent systems

Effect of densification distribution on the Young's modulus of porous coatings after nano-indentation

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Acta Metal.urgica Sinica(English letters) 2012年第5期25卷 383-390页

作者： Xiaojuan l.u Ping XIAO Haiyan lI School of Environment Science and Engineering North China Electric Power University Yonghua North Street Baoding 071000 China School of Materials The University of Manchester Manchester M1 7HS UK School of Mechanical Aerospace and Civil Engineering The University of Manchester P.O. Box 88Sackville Street Manchester M60 1QD UK

Nano-indentation of a porous ceramic coating leads to crushing and densification of the coating under the indenter. In this work, finite element simulations of indentation on the porous coating have been carried out to study the effect of the size and dis- tribution of densification on Youngts modulus measured by nano-indentation. Two totally different distribution patterns have been simulated in this work. In the case of gradient densification, the Youngts modulus increased by 8.6% when the densifi- cation has occurred in the maximum influenced area. While the Young^s modulus increased by 2% with a uniformed densification. Examinations of the cross-section of the coatings have suggested that the densification after the indentation is close to the second model. The measured Young＇s modulus could have differed by 2%. The effect of densification on the Young＇s modulus measured by using nano-indentation is strongly dependent on the densification patterns of the porous coating.

关键词： Film Mechanical property Finite element simulation Porosity Electron Microscopy

Adsorption of congo red on mesoporous activated carbon prepared by CO2 physical activation

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Chinese Journal of Chemical Engineering 2020年第4期28卷 1069-1076页

作者： Mingjie Ma huijuan Ying Fangfang Cao Qining Wang Ning Ai College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Zhejiang Province Key laboratory of Biomass Fuel Hangzhou 310014China Biodiesel laboratory of China Petrol.um and Chemical Industry Federation Hangzhou 310014China National Chemical and Chemical Engineer Experiment Teaching Center National Chemical and Chemical Engineer Simulation Experiment Teaching CenterZhejiang University of TechnologyHangzhou 310014China

This research demonstrates the production of mesoporous activated carbon from sargassum fusiforme via physical activation with carbon *** composite design was applied to conduct the experiments at different levels by altering three operating *** temperature(766-934℃),CO2 flow rate(0.8-2.8 l·min^-1)and activation time(5-55 min)were the variables examined in this *** effect of parameters on the specific surface area,total pore volume and burn-out rate of activated carbon was studied,and the influential parameters of methylene blue adsorption value were identified employing analysis of *** optimum conditions for maximum methylene blue adsorption value were:activation temperature=900℃,activation time=29.05 min and CO2 flow rate=1.8 l·min(-1).The activated carbon produced under optimum conditions was characterized by BET,FTIR and *** adsorption behavior on congo red was *** effect of parameters on the adsorbent dosage,temperature,PH and initial congo red concentration was *** adsorption properties of the activated carbon were investigated by *** equilibrium removal rate and maximum adsorption capacity reaches up to 94.72%,234 mg·g^-1,respectively when initial congo red concentration is 200 mg·l^-1 under adsorbent dosage(0.8 g·l^-1),temperature(30℃),PH7.

关键词： Sargassum fusiforme Mesoporous activated carbon Congo red Response surface method Kinetics