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妊娠4～6个月母体血清α-甲胎蛋白水平与随后婴儿猝死综合征发生风险的相关性研究

世界核心医学期刊文摘（妇产科学分册） 2005年第2期1卷 3-4页

作者： Smith G.C.S. wood a.m. Pell J.P. 兰玲 Department of Obstetrics Ca mbridg e U-niversityRosie Maternity Hospita lRobinson WayCam-bridg e CB22QQUnited Kingdom Prof.

BACKGROUND:Unexplained stillbirth and the sudden infant death syndrome (SIDS)share some features.A raised maternal serum level of alpha-fetoprotein during the second trimester of pregnancy is a.m.rker of placental dysfunction and a strong predictor o f the risk of unexplained *** is unknown whether alpha -fetoprotein levels also predict the risk of ***:We linked a prenatal -screening database for wo men in western Scot-land with databases of maternity,perinatal death,and birth and death certifications to assess t he association between second -trimester levels of maternal serum alpha -feto-protein and the subsequent risk of SI ***:a.m.ng 214,532women with singleton bi rths,there were114cases of SIDS(incidence,2.7per 10,000births a.m.ng women with alpha -fetoprotein l evels in the lowest quintile and 7.5per 10,000births am ong those with levels in the highest quintile).When the lowest quintile was used as a referent,the unadjusted odds ra tios for SIDS for the second through fifth quintiles were1.7(95percent confi-dence interval,0.8to 3.5),1.8(95percent confidence interval,0.9to 3.7),2.5(95percent confidence inter-val,1.3to 4.8),and 2.8(95percent confidence inter-val,1.4to 5.4),respectively(P for trend =0.001).The risk of SIDS varied inversely with th e birth -weight per-centile and the gestational age at delivery;after adjustment for these factors,the odds ratios fo r SIDS were 1.7(95percent confidence interval,0.8to3.5),1.7(95percent confidence interval,0.8to 3.5),2.2(95percent confi-dence interval,1.1to 4.4),and 2.2(95percent confi-dence interval,1.1to 4.3),respectively(P for trend =0.01).CONCLUSIONS:There is a direct asso ciation be-tween second -trimester maternal se rumalpha -fetoprotein levels and the risk of SIDS,which may be mediated in part through impaired fetal growth and pr eterm birth.

关键词：母体血清甲胎蛋白婴儿猝死综合征产前筛检胎儿发育数据库资料胎盘功能百分位数围生期死亡证明

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妊娠中期母亲血清甲胎蛋白水平变化与产后婴儿猝死综合征之间的关系

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世界核心医学期刊文摘（儿科学分册） 2005年第3期1卷 8-8页

作者： Smith G.C.S. wood a.m. Pell J.P. 刘健 Department of Obstetrics Cambridge University Rosie Maternity Hospital Robinson Way Cambridge CB2 2QQ United Kingdom

背景:不明原因的死产和婴儿猝死综合征(SIDS)都有一些相同的特点,在妊娠中期,母亲血清甲胎蛋白水平增高,表明胎盘功能障碍,也是胎儿不明原因死产的一个重要提示。母亲血清甲胎蛋白水平增高是否也可以预示SIDS的发生,尚不清楚。方法:作... 详细信息

背景:不明原因的死产和婴儿猝死综合征(SIDS)都有一些相同的特点,在妊娠中期,母亲血清甲胎蛋白水平增高,表明胎盘功能障碍,也是胎儿不明原因死产的一个重要提示。母亲血清甲胎蛋白水平增高是否也可以预示SIDS的发生,尚不清楚。方法:作者通过对苏格兰西部妇产医院提供的资料,包括产前信息、围生期胎儿死亡情况以及婴儿出生和死亡等情况进行评估。

关键词：血清甲胎蛋白婴儿猝死综合征妊娠中期围生期水平变化胎盘功能负相关

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足月新生儿呼吸道疾病发病率与儿童期哮喘发病风险的相关性

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世界核心医学期刊文摘（儿科学分册） 2005年第3期1卷 17-17页

作者： Smith G.C S. wood a.m. White I.R. 李开 Prof.Department of Obstetrics Cambridge UniversityRosie HospitalRobinson WayCambridgeCB2 2QQUnited Kingdom

目的:研究足月新生儿呼吸道疾病发病率与后来儿童期哮喘发病风险增大间的相关性,并明确这种相关性是否能够解释剖宫产与儿童期哮喘存在相关性这一既往报道。设计:根据苏格兰产科医院患病记录(SmR),分析产妇数据(SmR02)、新生儿数据(SmR... 详细信息

目的:研究足月新生儿呼吸道疾病发病率与后来儿童期哮喘发病风险增大间的相关性,并明确这种相关性是否能够解释剖宫产与儿童期哮喘存在相关性这一既往报道。设计:根据苏格兰产科医院患病记录(SmR),分析产妇数据(SmR02)、新生儿数据(SmR11)和急性医源性分娩意外数据,进行回顾性群体研究。机构:苏格兰产科医院。试验对象:收集1992-1995年间,苏格兰23所产科医院出生的所有单胎足月新生儿病例。

关键词：哮喘发病呼吸道疾病产妇数呼吸窘迫综合征群体研究阴道分娩分娩情况析产童期生时

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NLO response of derivatives of benzene, stilbene and diphenylacetylene：mP2 and DFT calculations

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Chinese Journal of Chemical Engineering 2017年第6期25卷 800-808页

作者： a.m. Elhorri m. Zouaoui-Rabah Laboratoire de microscopie Microanalyse et Spectroscopie Mol&ulaire Faculty of Sciences Djillali Liabes University of Sidi-Bel-Abbes 22000 Sidi-BeI-Abbes Algeria

mP2 method and different functionals such as m06-HF, m06-2X, CAm-B3 LYP, PBE0, B3 LYP and m06 L incorporating different XC amounts were used to calculate the static first hyperpolarizabilies β(0) of eight molecules which are derivatives of benzene, stilbene and diphenylacetylene. The values were then compared to the experimental ones. The m06-2X functional was then selected for further calculations. NBO calculations were also performed to define the intramolecular charge transfer in each molecule. TD-DFT calculations were performed taking into account the solvent effect using the IEF-PCm formalism. Some parameters characterizing the vertical transitions such as the wavelength of the maximum absorption λ_(max) were compared to the experimental ones. Finally,solvation Gibbs free enthalpy ΔG_(solv) values have also been examined in order to determine which the specific solvent for a given molecule is.

关键词： First hyperpolarizability DFT TD-DFT Push-pull molecules NBOCharge transfer

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Effect of Electroplating Parameters on microstructure of Nanocrystalline Nickel Coatings

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Journal of materials Science & Technology 2010年第1期26卷 82-86页

作者： a.m. Rashidi A. Amadeh Faculty of Engineering Razi University School of metallurgy & materials Engineering University College of Engineering University of Tehran

In order to achieve the optimum conditions for electroplating nanocrystalline nickel coating from Watts-type bath, the effect of some process parameters namely, bath temperature, current density, and saccharin addition on grain size and texture coefficient （TC= I（200）/I（111）） of the deposits were investigated by X-ray diffraction （XRD）. The results showed that in a bath containing 5 g/L saccharin, by increasing the bath temperature from 45℃ to 55℃, the grain size decreased, whereas further increase of bath temperature resulted in a contrary effect. By increasing the current density from 10 to 75 mA/cm^2, both the grain size and TC decreased, while further increase in current density had no significant effect on the grain size. At a given current density, the grain size and TC decreased rapidly by increasing the saccharin content before leveling off at 3 g/L of saccharin. Finally, based on the grain refining the optimum conditions for producing nanocrystalline nickel coating from Watts-type bath have been proposed.

关键词： Electroplating Grain size Nanocrystalline Coating

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Characterization and separation of pyrite from Abu Tartur black shale

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International Journal of mining Science and Technology 2015年第4期25卷 565-571页

作者： Ibrahim S.S. El Ka.m.r a.m. Guda a.m. Central metallurgical R&D Institute CMRDI Geology Dept. Faculty of Science National Research Astronomical & Geophysical Institute NRIAG

This work a.m.d for pyrite separation from Abu Tartur black shale as a source of sulfur to be an added economic value of Abu Tartur area. The considered samples in the present work were collected from a core drilled in Abu Tartur plateau representing the pyrite-rich black shale of the U. Cretaceous age, Sample characterization was carried out using petrographic microscope, XRD, DTA/DTG, C/S and XRF techniques. Clay minerals, silt-sized quartz, calcite, and hematite were the main minerals associating pyr- ite （5.34g）. Liberation behavior of the sample was about 80% below 5 μm. Sample processing was achieved through one-day soaking followed by classification using I inch mozley hydro-cyclone where about 35.5% by weight went to underflow and 64.5% went to overflow. The underflow product was subjected to an advanced gravity separation process using SB-40 Falcon Concentrator through a CCD statistical design prepared by Design-Expert 6.0 software proposed to opti- mize the separation process through a study for the effects of frequency （Hz） and water pressure （Psi） on both assay and recovery of the sulfur-rich heavy fraction. A heavy concentrate weighed 10.90% with inorganic sulfur content reached 11.37% （21.24% pyrite） with overall recovery （50.01%） was obtained after two cleaning at the optimum conditions.

关键词： Abu Tartur plateau Black shale Pyrite Falcon Concentrator

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Effective Lower Bounds of Wrap-Around L_2-Discrepancy on Three-Level Combined Designs

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Journal of Systems Science & Complexity 2017年第6期30卷 1459-1469页

作者： ELSAWAH a.m. HU Jianwei QIN Hong Faculty of mathematics and Statistics Central China Normal University Division of Science and Technology BNU-HKBU United International College Department ofmathematics Faculty of Science Zagazig University

How to obtain an effective design is a.m.jor concern of scientific research. This topic always involves high-dimensional inputs with limited resources. The foldover is a quick and useful technique in construction of fractional designs, which typically releases aliased factors or *** paper takes the wrap-around L_2-discrepancy as the optimality measure to assess the optimal three-level combined designs. New and efficient analytical expressions and lower bounds of the wraparound L_2-discrepancy for three-level combined designs are obtained. The new lower bound is useful and sharper than the existing lower bound. Using the new analytical expression and lower bound as the benchmarks, the authors may implement an effective algorithm for constructing optimal three-level combined designs.

关键词： Combined design Foldover plan L2-discrepancy lower bound optimal combined design wrap-around

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Timoshenko inclusions in elastic bodies crossing an external boundary at zero angle

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Acta.m.chanica Solida Sinica 2017年第3期30卷 327-333页

作者： a.m. Khludnev T.S. Popova Lavrentyev Institute of Hydrodynamics of R_AS Novosibirsk State University Novosibirsk 630090 Russia North-Eastern Federal University Yakutsk 677000 Russia

The paper concerns an analysis of equilibrium problems for 2D elastic bodies with a thin Timoshenko inclusion crossing an external boundary at zero angle. The inclusion is assumed to be delaminated, thus forming a crack between the inclusion and the body. We consider elastic inclusions as well as rigid inclusions. To prevent a.m.tual penetration between the crack faces, inequality type boundary conditions are imposed at the crack faces. Theorems of existence and uniqueness are established. Passages to limits are investigated as a rigidity parameter of the elastic inclusion going to infinity.

关键词： Thin Timoshenko inclusion Crack Delamination Fictitious domain method Non-penetration

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Orderly decorated nanostructural photoelectrodes with uniform spherical TiO2 particles for dye-sensitized solar cells

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Frontiers of Chemical Science and Engineering 2015年第4期9卷 532-540页

作者： a.m. Bakhshayesh S.S. Azadfar Department of Research and Development SUN Nanotechnologists Company Tehran 13488-96394 Iran

This study presents a novel nanostructural electrode made of 20-nm-diameter nanoparticles, which orderly decorated with 2-μm TiO2 particles, deposited by a new gel process. The decorated electrode （DE） is better than the non-decorated electrode （NE） in both light scattering and light harvesting, as confirmed by diffuse reflectance spectroscopy. X-ray diffraction reveals that both electrodes have a.m.xture of anatase and rutile phases. The dye-sensitized solar cell based on the decorated electrode shows the highest power conversion efficiency of 7.80% as a result of less recombination demonstrated by electrochemical impedance spectroscopy. From internal power conversion efficiency measurement, the external quantum efficiency of DE cell at 530 nm is 89%, which is higher than that of NE cell （77%）.

关键词： dye-sensitized solar cell uniform particles,TiO2 gel process light harvesting

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Electron Acceleration by microwave Radiation Inside a Rectangular Waveguide

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Pla.m. Science and Technology 2011年第3期13卷 357-361页

作者： B. F. mOHAmED a.m. GOUDA Pla.m. Physics Department N.R.C. Atomic Energy Authority Cairo Egypt

Electron dynamics in the fields associated with a transverse magnetic （Tm） wave propagating inside a rectangular waveguide is analytically studied. The relativistic momentum and energy equations for an electron are solved, which was injected initially along the propagation direction of the microwave. Expressions of the acceleration gradient and deflection angle are obtained. In principle, it is shown that the electron can be accelerated in this condition and there is no deflection when the electron is injected from the centre of the waveguide front. However, it is found that the acceleration gradient and deflection angle depend strongly on the parameters of the microwave （intensity, frequency, etc.） and the dimensions of the waveguide.

关键词： waveguide electron acceleration polarized microwave

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