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Evaluation of Erythrocyte Iron Incorporation in Beijing Prepubertal Children Using a Single Stable Isotope Tracer Method

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Biomedical and Environmental Sciences 2020年第6期33卷 414-420页

作者： ZHANG Yu LI Ya Jie ren Tong Xiang LIU xiao Bing YANG Li Chen PAO Jian Hua WANG Jurr YANG xiao guang Key Laboratory of Trace Element Nutrition MOHChinese Center for Disease Control and PreventionBeijing 100050China Department of Preventive Medicine Changzhi Medical CollegeChangzhi 046000ShanxiChina National Institute of Metrology Beijing 100029China

Objective To analyze the rate of erythrocyte iron incorporation and provided guidance for the iron nutrition for prepubertal *** Fifty-seven prepubertal children of Beijing were involved in this study and each subject was orally administered 3 mg of 57 Fe twice daily to obtain a total of 30 mg 57 Fe after a 5-d period. The stable isotope ratios in RBCs were determined in 14 th day, 28 th day, 60 th day, and 90 th day. The erythrocyte incorporation rate in children was calculated using the stable isotope ratios, blood volume and body iron *** The percentage of erythrocyte 57 Fe incorporation increased starting 14 th day, reached a peak at 60 d(boys: 19.67% ± 0.56%, girls: 21.33% ± 0.59%) and then decreased. The erythrocyte incorporation rates of 57 Fe obtained for girls in 60 th day was significantly higher than those obtained for boys(P ren can be used to obtain erythrocyte iron incorporation within 90 d. Prepubertal girls should begin to increase the intake of iron and further studies should pay more attention to the iron status in prepubertal children.

关键词： Stable isotope tracer technique Iron Erythrocyte incorporation rate Beijing prepubertal children MC-ICP-MS

CLOCK rs1801260 Polymorphism is Associated with Susceptibility to Parkinson's Disease in a Chinese Population

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Neuroscience Bulletin 2017年第6期33卷 734-736页

作者： Fan Lou Ming Li Yan ren xiao-guang Luo Na Liu xiaohong Li Department of Neurology First Affiliated Hospital of China Medical University Department of Neurology The Fourth Affiliated Hospital of China Medical University

Dear Editor,Until now,over 7 genes have been involved in the pathogenesis of Parkinson’s disease（PD）,which is generally considered to be caused by a combination of genes and ***,the clock genes that regulate the circadian rhythm have aroused much interest,since a great deal of evidence suggests that alterations of the circadian system participate in the pathogenesis of PD[1,2].Among

关键词： PD PER

A new method for evaluating wedges of steel plates and strips

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Journal of Iron and Steel Research International 2024年第7期31卷 1719-1735页

作者： xiao-bao Ma xiao-xin Ma Tao Wang Zhong-kai ren Yu-cheng ren College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Ministry of Education Engineering Research Center of Advanced Metal Composite Forming Technology and Equipment Taiyuan University of TechnologyTaiyuan 030024ShanxiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment Taiyuan University of TechnologyTaiyuan 030024ShanxiChina China National Heavy Machinery Research Institute Co. Ltd.Xi'an 710018ShaanxiChina Faculty of Mechanical Engineering Hebei University of ArchitectureZhangjiakou 075000HebeiChina

To overcome the inaccuracy problem of the traditional wedge evaluation of steel plates and strips caused by the ran-domness of the thicknesses of two local points and improve the reliability of the wedge index,the double-centroid method for the wedge evaluation was proposed,and a model based on the centroid theory was ***,an integral model for the discrete thickness values of the cross-section profiles was *** discussion focused on the distinct characteristics of the two-point method,asymmetric method,and double-centroid method in evaluating the asymmetric distribution of *** three methods were employed to evaluate the wedge values of both the theoretical and measured cross-sections of steel plates and strips,and the accuracies of three wedge evaluation models were analyzed and *** results showed that the double-centroid method objectively reflects the degree and variation characteristics of the wedge values of the cross-sections of steel plates and strips,and this method is feasible,reliable,and outstanding.

关键词： Steel plate and strip Wedge Two-point method Double-centroid method Reliability

Mapping of Mutant Gene prbs Controlling Poly-Row-and-Branched Spike in Barley (Hordeum vulgare L.)

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Agricultural Sciences in China 2011年第10期10卷 1501-1505页

作者： HUANG Bi-guang WU Wei-ren Key Laboratory for Genetics Breeding and Multiple Utilization of Crops Ministry of Education/College of Crop Science Fujian Agriculture and Forestry University Fuzhou 350002 P.R.China

A row-type mutant of barley named poly-row-and-branched spike （prbs） was previously obtained from a two-rowed cultivar Pudamai-2 after treated by inflorescence soaking in maize total DNA solution. The mutant produces branched spikes with irregular multiple rows. Genetic analysis indicated that the mutant phenotype was caused by a recessive gene prbs, and the PRBS locus had a recessive epistatic effect on an independent locus （denoted as Vrsx） conferring the variation of two-rowed spike vs. six-rowed spike. This study aimed to map PRBS as well as Vrsx using simple sequence repeats （SSR） markers. We developed an F2 population from a cross between the prbs mutant and a six-rowed cultivar Putianwudu for the gene mapping. As the two target loci interacted to result in a segregation ratio of two-rowed type：six-rowed type：prbs=9：3：4 in the population, we adopted a special strategy to map the two loci. PRBS was mapped between SSR markers HvLTPPB and Bmag0508A on the short arm of chromosome 3H, with distances of 24.7 and 14.3 cM to the two markers, respectively. Vrsx was mapped between SSR markers Bmag0125 and Bmag0378 on chromosome 2H, with distances of 6.9 and 15.3 cM to the two markers, respectively. This suggests that Vrsx should be the known locus Vrs1, which predominantly controls row-type variation in barley cultivars, and PRBS is a new locus related to the row type of spikes in barley.

关键词： barley row type prbs mapping SSR

Porosity model and pore evolution of transitional shales:an example from the Southern North China Basin

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Petroleum Science 2020年第6期17卷 1512-1526页

作者： xiao-guang Yang Shao-Bin Guo School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism Ministry of EducationBeijing 100083China

The evolution of shale reservoirs is mainly related to two functions:mechanical compaction controlled by ground stress and chemical compaction controlled by thermal *** simulation experiments were conducted to simulate the chemical compaction of marine-continental transitional shale,and X-ray diffraction(XRD),CO2 adsorption,N2 adsorption and high-pressure mercury injection(MIP)were then used to characterize shale diagenesis and ***,simulations of mechanical compaction adhering to mathematical models were performed,and a shale compaction model was proposed considering clay content and kaolinite *** advantage of this model is that the change in shale compressibility,which is caused by the transformation of clay minerals during thermal evolution,may be *** combination of the thermal simulation and compaction model may depict the interactions between chemical and mechanical *** interactions may then express the pore evolution of shale in actual conditions of ***,the obtained results demonstrated that shales having low kaolinite possess higher porosity at the same burial depth and clay mineral content,proving that other clay minerals such as illite-smectite mixed layers(I/S)and illite are conducive to the development of *** possessing a high clay mineral content have a higher porosity in shallow layers(3500 m).Both the amount and location of the increase in porosity differ at different geothermal *** geothermal gradients favor the preservation of high porosity in shale at an appropriate *** pore evolution of the marine-continental transitional shale is divided into five *** 2 possesses an Ro of 1.0%-1.6%and has high porosity along with a high specific surface *** 3 has an Ro of 1.6%-2.0%and contains a higher porosity with a low specific surface ***,Stage 4 has an Ro of 2.0%-2.9%with a low porosity and h

关键词： Thermal simulation Porosity model Pore evolution Transitional shale Southern North China Basin Shanxi formation

Quantum Cryptography Using Coherent State

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Chinese Physics Letters 1996年第4期13卷 277-280页

作者： ZHANG xiao-yu GUO guang-can Department of Physics University of Science and Technology of ChinaHefei 230026

Quantum cryptography is a new way to distribute keys,which can detect any *** cryptography using single particle or weak light pulse has been discussed in some early papers,but it is difficult to transmit such single particle or weak light *** propose a scheme of quantum key distribution using coherent state |α> and |α+△α>.We also discuss its feasibility and security,and give an experimental realization of this schemed.

关键词： scheme realization coherent

Pointwise A Priori Estimates for Solutions to Some p-Laplacian Equations

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Acta Mathematica Sinica,English Series 2022年第12期38卷 2150-2162页

作者： xiao Qiang SUN Ji guang BAO School of Mathematics Sun Yat-sen UniversityGuangzhou 510275P.R.China School of Mathematical Sciences Beijing Normal UniversityLaboratory of Mathematics and Complex SystemsMinistry of EducationBeijing 100875P.R.China

In this article,we apply blow-up analysis to study pointwise a priori estimates for some p-Laplacian equations based on Liouville type *** newly developed analysis techniques,we first extend the classical results of interior gradient estimates for the harmonic function to that for the p-harmonic function,i.e.,the solution ofΔpu=0,x∈Ω.We then obtain singularity and decay estimates of the sign-changing solution of Lane-Emden-Fowler type p-Laplacian equation-Δp^(u)=|u|^(λ-1)u,x∈Ω,which are then extended to the equation with general right hand term f(x,u)with certain asymptotic *** addition,point wise estimates for higher order derivatives of the solution to Lane-Emden type p-Laplacian equation,in a case of p=2,are also discussed.

关键词： Priori estimates Blow-up analysis p-Laplacian

Effect of Sleeve Plunge Depth on Interface/Mechanical Characteristics in Refill Friction Stir Spot Welded Joint

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Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 551-560页

作者： guang-Da Sun Li Zhou ren-xiao Zhang Ling-Yun Luo Hao Xu Hong-Yun Zhao Ning Guo Di Zhang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China State Key Laboratory of Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

Refill friction stir spot welding was employed to produce 6061-T6 aluminum alloy joints with different sleeve plunge *** interface characteristics of joint-line remnant and hook are investigated by optical and scanning electron *** joint-line remnant consists of primary bonding region and secondary bonding region,and two types of hook can be identified as downward hook and upward *** shear results demonstrate that joint-line remnant and hook make interaction effects on tensile shear *** optimal joint is achieved when sleeve plunge depth was 2.0 mm with the corresponding failure load of 8673.4 *** different types of fracture mode are exhibited in joints produced at different sleeve plunge depths,which are closely related with the morphology of interface characteristics.

关键词： Refill friction stir spot welding Interface characteristics Mechanical properties Fracture behavior

Controlled synthesis and optical properties of Ce^(3+)/Tb^(3+) co-doped BaGdF_5 nanocrystals

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Rare Metals 2015年第9期34卷 673-678页

作者： Chun-Yan Cao An Xie xiao-guang Yu College of Mathematics and Physics Jinggangshan University School of Materials Science and Engineering Xiamen University of Technology

Based on a hydrothermal method, the Ce3+/Tb3+ co-doped Ba Gd F5 nanocrystals were synthesized by controlling the introduction concentration of Ba2+ and Gd3+. The samples were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM) images, photoluminescence(PL) excitation, and emission spectra, as well as the photoluminescence dynamic decay curves. With the increase of the Ba2+ concentration in the synthesis procedure, the positions of diffraction peaks of XRD patterns move toward lower degree, and the case of the samples synthesized with the increase of the Gd3+ concentration is contrary, which consists well with each other. The FE-SEM images suggest that the BaGdF5 nanocrystals are in spherical morphology,and the average diameters decrease with the increase of Ba2+ or Gd3+ concentration. For the 4f–5d transition of Ce3+ is sensitive to the environment of local lattice, the PL excitation and emission spectra of the samples are different. The 4f–4f transition of Tb3+ also presents different optical properties in different host lattices. The variations of the optical properties of Ce3+ and Tb3+ as well as the lifetime of the 5D4+7F5 emission of Tb3+ are also consistent well with each other in the two series of samples.

关键词： Hydrothermal synthesis Optical properties Nanocrys