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Journal of Iron and steel Research International 2016年第6期23卷 559-565页

作者： Fu-ming LIU Jian-jun WANG Yu-jie LIU R.d.K.MIsRA Chun-ming LIU school of Materials science and Engineering Northeastern University Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education Northeastern University Laboratory for Excellence in Advanced steel Research Department of Metallurgical and Materials EngineeringUniversity of Texas at El Paso

Microstructural evolution,precipitation behavior,and tensile properties of four experimental Mo-bearing steels were studied to elucidate the effects of Nb and V on microstructural *** results indicated that the microstructure of hot-rolled steels consisted of polygonal ferrite and degenerate pearlite,and the morphology remained same after holding at 600 ℃for *** smallest grain size was obtained in Nb-V-Mo containing steel,followed by Nb-Mo and V-Mo *** was less in the hot-rolled Mo-bearing *** maximum volume fraction of precipitates was obtained in Nb-V-Mo bearing steel,and the Nb-V-Mo complex carbonitrides were highly stable at 600℃.In the Mo-bearing steel,the yield ratio was lowest at room temperature but highest at 600℃,which was attributed to the precipitation of Mo carbides and drag effect of Mo solute on dislocation movement.

关键词： rolled steels Precipitation tensile solute attributed polygonal holding ferrite dislocation

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The Clinical Features and Outcomes of Four Neonates Born to Mothers with a severe Form of COVId-19 and a Positive RT-PCR for sARs Co-V2 in douala Gynaeco-Obstetric and Pediatric Hospital in Cameroon

作者： d.s.·米特里诺维奇(d.s. Mitrinovic) P.M.·瓦西奇(P.M. Vasic)

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Open Journal of Pediatrics 2020年第4期10卷 642-651页

作者： dominique Enyama d. Noukeu Njinkui I. Rakya d. djomo Tamchom R. Tiokeng Nenzeko C. Mbakop Tchogna M. C. Bissa s. R. Wekang Tcheuffa d. Kamdem A. Ngalame H. Neng d. Mwadjie Ndongo Eteme F. Kemta Lekpa s. R. simeni Njonnou s. P. Choukem G. P. Ngaba E. T. Mboudou douala Gynaeco-Obstetric and Pediatric Hospital Douala Cameroon Faculty of Medicine and Pharmaceutical sciences University of Dschang Dschang Cameroon The University of dschang Taskforce for the Elimination of COVId-19 (UNITEd#COVId-19) Dschang Cameroon Faculty of Medicine and Biomedical sciences University of Garoua Garoua Cameroon Faculty of Medicine and Pharmaceutical sciences University of douala Douala Cameroon Faculty of Medicine and Biomedical sciences University of Yaoundé I Yaounde Cameroon

Background: A novel viral respiratory disease caused by the severe acute respiratory syndrome coronavirus 2 (sARs-CoV-2), is responsible for a worldwide pandemic. The effects of this new disease in pregnant women and ... 详细信息

strong>Bastrong>ckground: A novel viral respiratory disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is responsible for a worldwide pandemic. The effects of this new disease in pregnant women and newborns are actually not well known. Methods: We investigated the clinical features and outcomes of four neonates born to mothers with a sspan>span>span>evere form of COVID-19 and a positive RT-PCR for SARS Co-V2 in Douala Gynaeco-Obstetric and Pediatric Hospital (Cameroon) from April 20 to June 5, 2020. Results:dana;"> All four mothers were symptomatic and had a positive RT-PCR for sARs CoV-2 from nasopharyngeal swab on admission. All of them delivered prematurely through cesarean section because of severe respiratory distress and one died shortly after delivery. The four premature male infants were born between 30 weeks and 35 weeks 2 days of gestation and had birth weights ranging from 1090 g to 2950 g. All infants had 1-minute Apgar scores that ranged from 7 to 8 and 5-minute Apgar scores varying between 8 and 9. They were isolated from their mothers immediately after birth and received formula feeding. Three of the four infants were tested using nasopharyngeal swab specimens for RT-PCR 24 to 48 hours after birth and were negative for COVId-19. All the infants were treated in a dedicated area at the neonatal care unit and presented with mild respiratory distress on admission with a silverman score that varied between 2 and 4/10. during their hospitalization, all the infants also presented with jaundice and underwent phototherapy. Three of the

关键词： COVId-19 Infected Mothers Premature Newborns severe Respiratory distress Outcome Cameroon

Respiratory distress Indicative of a Right Bochdalek Hernia in a Central African Newborn

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Open Journal of Pediatrics 2022年第5期12卷 719-725页

作者： C. J. Kiteze Nguinzanemou F. Fiobem d. s. Ouaimon J. E. Raphaella s. Gbenou s. Tenehombi Ngatchoukpo V. Ndoma J.-C. Gody Clinique Médicale Infantile Raymond Max siopathis Centre Hospitalo-Universitaire Pédiatrique de Bangui Bangui République Centrafricaine service de Chirurgie Infantile CHUPB Bangui République Centrafricaine

Congenital cupola diaphragmatic hernia (CdH) is a congenital embryopathy which is defined by the absence of development of all or part of a diaphragmatic cupola. We report a case of posterolateral diaphragmatic hernia called right Bochdalek hernia in a three-day-old newborn hospitalized in the neonatology department of the Center Hospitalier Universitaire Pédiatrique de Bangui (CHUPB) for respiratory discomfort, vomiting and fever. Unsuccessful treatment for neonatal staphylococcal infection diagnosis of diaphragmatic hernia was suggested and confirmed on day 18 of life by computed tomography and intraoperatively.

关键词： Bochdalek Hernia Newborn Bangui

Adipose-derived stem cells and knee osteoarthritis:New perspectives,old concerns

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World Journal of Orthopedics 2024年第11期15卷 1001-1006页

作者： Eduardo B de sousa JoséPaulo A Gabbi Filho Vinicius s Gameiro Leandra s Baptista department of General and specialized surgery Fluminense Federal UniversityRio de Janeiro 24070-090Brazil department of Orthopaedics Quinta D’Or HospitalRio de Janeiro 20941-150Brazil duque de Caxias Campus Prof Geraldo Cidade Federal University of Rio de JaneiroRio de Janeiro 25065-050Brazil

In this editorial,we comment on the paper by Muthu et al published in the recent issue of the *** editorial review focusses on the use of adipose-derived stem cells(AdsCs)in knee osteoarthritis *** discuss the differences between the stromal vascular fraction and microfragmented adipose tissue and highlight the results of clinical studies comparing both treatments and the use of hyaluronic acid,platelet-rich plasma,and bone marrow aspirate *** use of expanded AdsCs is also discussed;moreover,concerns regarding treatment with AdsCs,particularly the heterogeneity of published studies and the need to standardize protocols to explore clinical potential is explored.

关键词： Adipose tissue Adipose-derived stem cells stromal vascular fraction Knee Osteoarthritis Microfragmented adipose tissue

Radiative heat transfer and thermal characteristics of Fe-based oxides coated siC and Alumina RPC structures as integrated solar thermochemical reactor

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science China(Technological sciences) 2018年第12期61卷 1788-1801页

作者： GUENE LOUGOU Bachirou sHUAI Yong PAN RuMing CHAFFA Gédéon AHOUANNOU Clément ZHANG Hao TAN HePing Key Laboratory of Aerospace Thermophysics of Ministry of Industry and Information Technology Harbin Institute of Technology school of Energy science and Engineering Harbin Institute of Technology Laboratory of Energetics and Applied Mechanics (LEMA) Polytechnic College of Abomey-Calavi Abomey-Calavi University

This paper investigated radiative heat transfer and thermal characteristics of Fe-based oxides coated siC and Alumina reticulated porous ceramic structures as integrated solar thermochemical ***-flux solar radiation absorption and axial temperature distribution in the ceramic foams reactor were analyzed by adopting surface-to-surface radiation model coupled to the P1approximation for radiation heat *** radiative heat transfer and thermal characteristics of different foam-type RPC structures,including siC,CeO_2,FeAl_2O_4,NiFeAlO_4,Fe_3O_4/siC,and NiFe_2O_4/siC were *** mass flow rate and foam structural parameters,including the permeability,pore mean cell size,and extinction coefficients have significantly affected the axial temperature distribution,pressure drop,heat transfer,and fluid *** porous structure to the solar receiver could maximize the incorporation of redox powder in the reacting medium,lower the pressure drop,and enhance the thermal performance of the thermochemical reacting *** structure was the candidate materials in the case where more heat flux and high axial temperature distribution is ***,Fe-based oxide coated Al_2O_3structure could be considered regarding the heat transfer enhancement along with the catalyst activity of oxygen carriers for solar thermochemical reacting system performance.

关键词： solar thermochemical reactor reticulated porous ceramics heat transfer and fluid flow pore mean cell size permeability and pressure drop

CHEMICAL PRETREATMENTs OF THE sURFACE OF WC-15wt%Co WITH dIAmond COATINGs

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Acta Metallurgica sinica(English Letters) 2001年第2期14卷 143-147页

作者： s. Liu, Z.M. Yu, d.Q. Yi and Y.X. Li (department of Materials science & Engineering, Central south University, Changsha 410083, China) (Hunan Yin Zhou Nonferrous Metals Hi-Tech. Ltd. Company, Changsha 410083, China) dept. of Mat. sci. and Eng. Central South Univ. Changsha 410083 China

diamond films were deposited on the cemented carbide WC-15%Co substrates by a hot-filament chemical vapor deposition (HF CVd) reactor. The substrate surfaces were chemically pretreated by the following two-step etching method: first using Murakami reagent for 1-3 min, and second using an HNO3:HCl=1:1 solution for 10-40 min. It is indicated that the Co content of the substrate surfaces could be reduced from 15% to 0.81-6.04% within the etching depth of 5-10μm, the surface roughness of the substrates was increased up to Ra=1.0μm, and the substrates hardness was decreased from 89.0 HRA to 83.0 HRA after the two-step etching. It is observed that the morphologies of the diamond films on the WC-15%wt Co substrates emerge in various shapes. The indentation testing shows that the good adhesion between diamond film and the substrate after HF CVd deposition could be obtained.

关键词： Chemical vapor deposition Cobalt diamond films surface treatment Tungsten carbide

施氮量及其施用时间对甘蔗生长、产量和质量的影响

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甘蔗糖业 1982年第9期 40-42+39页

作者： s.s.Narwal d.s.Malik 黄勇

甘蔗是生长期长的高产作物,要从土壤中吸取大量养分。Kirtikar和Bajpai（1972）曾报道,甘蔗产量达到每公顷53.0吨时,每公顷分别吸取N、P;O;, K;O、CaO、MgO90.7、42.3、185.3, 77.44和58.6公斤。Ray等（1975）发现甘蔗产量达到每公顷63.5吨

关键词：甘蔗糖料作物施氮量施用时间茎径产量

Calculation of Viscosities of Liquid Mixtures Using Eyring’s Theory in Combination with Cubic Equations of state

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Chinese Journal of Chemical Engineering 2006年第6期14卷 770-779页

作者：计伟荣 d. A. Lempe College of Chemical Engineering and Materials science Zhejiang University of Technology department of Engineering science Martin-Luther University of Halle-WittenbergD-06099HalleGermany

Cubic equations of state EOs have been combined with the absolute rate theory of Eyring to calculate viscosities of liquid mixtures. A modified Huron-Vidal gE-mixing rule is employed in the calculation and in com- parison with the van Laar and the Redlich-Kister-type mixing rule. The EOs method gives an accurate correlation of liquid viscosities with an overall average deviation less than 1% for 67 binary systems including aqueous solu- tions. It is also successful in extrapolating viscosity data over a certain temperature range using parameters obtained from the isotherm at a given temperature and in predicting viscosities of ternary solutions from binary parameters for either polar or associated systems.

关键词： viscosity equation of state mixing rule absolute rate theory

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