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Choroidal Tuberculoma in an Immunocompetent Young Patient

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Chinese Medical Sciences Journal 2011年第3期26卷 194-196页

作者： xiu-fen Yang Jun Xu Kai Ma Beijing Tongren Eye Center Beijing Ophthalmology and Visual Sciences Key LaboratoryBeijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of Ophthalmology Liaocheng Renmin HospitalLiaochengShandong 252000China

TUBERCULOSIS （TB） remains one of the leading causes of preventable morbidity and mortality from infectious disease worldwide.1 It is a chronic progressive granulomatous infection caused by Mycobacterium tuberculosis... 详细信息

关键词： choroidal tuberculoma tuberculosis choroiditis

Changes of spring wind erosion based on wind erosion climate factor in the black soil region of Northeast China

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Journal of Mountain Science 2023年第6期20卷 1712-1724页

作者： YAN Ping JI Sheng-tai li xiu-fen ZHU Hai-xia WANG liang-liang ZHAI Mo WANG Ping ZHAO Hui-ying Heilongjiang Institute of Meteorological Sciences Harbin 150030China Innovation and Open Laboratory of Eco-meteorology in Northeast China China Meteorological AdministrationHarbin 150030China Heilongjiang Ecological Meteorological Center Harbin 150030China

The dry and windy climate and low ground cover in spring in the black soil region of Northeast China make the soil strongly affected by wind erosion,which seriously threatens the food security and ecological security of this *** this paper,based on the daily observation data of 124 meteorological stations in study area from 1961 to 2020,seasonal and monthly wind erosion climate factor(C)in spring(March to May)were calculated by using the method proposed by the Food and Agriculture Organization of the United Nations(FAO),the wind erosion characterization in spring were systematically analyzed based on C by various statistical analysis *** results showed that in the past 60 years,spring wind erosion climate factor(CSp)and monthly C of the whole region and each province(region)all showed highly significant decreasing trend,but they began to show rebounded trend in the middle or late *** of the study area showed a significant upward trend since 2008 with an increase of 4.59(10a)^(-1).The main contributors to this upward trend are the changes of C in March and in *** the four provinces(regions),CSp in Heilongjiang,Jilin,liaoning and eastern Inner Mongolia all showed rebounded since 2008,2011,2008 and 2009,*** rebounded trend of CSp in eastern Inner Mongolia was the most obvious with a tendency rate of 11.27(10a)^(-1),and its mutation occurred after *** rebound trend of CSp in Heilongjiang Province takes the second place,with a trend rate of 4.72(10a)^(-1),but there’s no obvious time mutation *** spatial characteristics of CSpand monthly C are similar,showing decreasing characteristics centered on the typical black soil belt of Northeast *** with 1961-1990,in the period from 1991 to 2020,the proportion of high value areas(CSp>35,monthly C>10)has decreased to varying degrees,while the proportion of low value areas(CSp≤10,monthly C≤4)has *** trends of seasonal and monthly C in 82.2%~87.7%of the

关键词： Wind erosion climate erosivity Spatiotemporal 1characteristics Climate change Rebounded trend Typical black soil region Northeast China

Equilibrium Strategies in an Unobservable On-off Fluid Queue

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Acta Mathematicae Applicatae Sinica 2022年第2期38卷 324-336页

作者： xiu-li XU Shuo WANG School of Science Yanshan UniversityQinhuangdao 060004China

This paper considers an on-off fluid queue *** on and off states of the system appear alternately,and the sojourn times at these two different states are independent,and each one follows an exponential *** fluid flows into the system buffer with some strategies to wait for the system service under the first-come first-served *** the system can process the fluid in the buffer only when the system is on *** given utility functions such as an expected average social profit,and an individual expected profit,the equilibrium strategies are characterized under both the fully unobservable case and the partially observable case.

关键词： fluid model on-off equilibrium strategies optimal benefit

Non-existence of Multi-peak Solutions to the Schrödinger-Newton System with L2-constraint

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Acta Mathematicae Applicatae Sinica 2023年第4期39卷 868-877页

作者： Qing GUO li-xiu DUAN College of Science Minzu University of ChinaBeijing 100081China

In this paper, we are concerned with the the Schrödinger-Newton system with L^(2)-constraint. Precisely, we prove that there cannot exist multi-peak normalized solutions concentrating at k different critical points of V(x) under certain assumptions on asymptotic behavior of V(x) and its first derivatives near these points. Especially, the critical points of V(x) in this paper must be *** main tools are a local Pohozaev type of identity and the blow-up analysis. Our results also show that the asymptotic behavior of concentrated points to Schrödinger-Newton problem is quite different from the classical Schrödinger equations, which is mainly caused by the nonlocal term.

关键词： Schrödinger-Newton equation Non-existence Multi-peak solutions Normalized solutions Pohozaev identity

Effect of SiO_(2) and B_(2)O_(3) on crystallization and structure of CaF2–CaO–Al_(2)O_(3)-based slag for electroslag remelting of ultra-supercritical rotor steel

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Journal of Iron and Steel Research International 2021年第12期28卷 1530-1540页

作者： Yi Huang Cheng-bin Shi xiu-xiu Wan Jiang-ling li Ding-li Zheng Jing li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China College of Materials Science and Engineering Chongqing UniversityChongqing400044China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina

Regarding development of the dedicated slag for electroslag remelting,crystallization characteristics of the slag exert a strong influence on the initial solidification of liquid metal in mold and surface quality of as-cast *** crystallization behavior of CaF_(2)-CaO-Al_(2)O_(3)-based slag with varying SiO_(2)and B_(2)O_(3)contents and their correlation with the slag structure were *** SiO_(2)(0.24-8.95 mass%)and B_(2)O_(3)(0-3.20 mass%)contents lowers the crystallization temperature and suppresses the crystallization of the slag melts,as well as decreases the sizes of the crystalline *** crystalline phases precipitated during continuous cooling of the slag melts are faceted 11CaO·7Al_(2)O_(3)·CaF_(2),faceted or spherical CaF_(2),and non-faceted MgO·Al_(2)O_(3)(or MgO)in sequence irrespective of the SiO_(2)and B_(2)O_(3)contents of the *** polymerization degree of slag melts increases with increasing either SiO_(2)or B_(2)O_(3)*** crystallization of the slag melts is increasingly retarded with increasing the SiO_(2)and B_(2)O_(3)contents of the slag caused by increased component diffusion resistance originating from increased polymerization degree of the slag melts.

关键词： Crystallization Slag structure Polymerization degree Electroslag remelting Ultra-supercritical rotor steel

Contributions of Individual Amino Acid Residues to the Endogenous CLV3 Function in Shoot Apical Meristem Maintenance in Arabidopsis

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Molecular Plant 2012年第2期5卷 515-523页

作者： xiu-fen Song Da-li Yu Ting-Ting Xu Shi-Chao Ren Peng Guo Chun-Ming liu Key Laboratory of Plant Molecular Physiology institute of BotanyChinese Academy of SciencesNanxincun 20Fragrant HillBeijing 100093China Graduate School of Chinese Academy of Sciences Beijing 100049China

As a peptide hormone, CLV3 restricts the stem cell number in shoot apical meristem （SAM） by interacting with CLV1/CLV2/CRN/RPK2 receptor complexes. To elucidate how the function of the CLV3 peptide in SAM maintenance is established at the amino acid （AA） level, alanine substitutions were performed by introducing point mutations to individual residues in the peptide-coding region of CLV3 and its flanking sequences. Constructs carrying such substitutions, expressed under the control of CLV3 regulatory elements, were transformed to the clv3-2 null mutant to evaluate their efficiencies in complementing its defects in SAMs in vivo. These studies showed that aspartate-8, histidine-11, glycine-6, proline-4, arginine-1, and proline-9, arranged in an order of importance, were critical, while threonine-2, valine-3, serine-5, and the previously assigned hydroxylation and arabinosylation residue proline-7 were trivial for the endogenous CLV3 function in SAM maintenance. In contrast, substitutions of flanking residues did not impose much damage on CLV3. Complementation of different alanine-substituted constructs was confirmed by measurements of the sizes of SAMs and the WUS expression levels in transgenic plants. These studies established a complete contribution map of individual residues in the peptide-coding region of CLV3 for its function in SAM, which may help to understand peptide hormones in general.

关键词： CLV3 peptide stem cell maintenance amino acid residue contribution.

Clinical significance of serum biochemistry changes in mice with targeted disruption of βB2-crystallin gene

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International Journal of Ophthalmology(English edition) 2012年第1期5卷 55-58页

作者： fen-fen Xiang, Wen-Jie li Department of Laboratory Diagnosis Changhai Hospital Second Military Medical University Shanghai 200433 China Department of Ophthalmology Changhai Hospital Second Military Medical University Shanghai 200433 China

AIM: To explore the pathogenesis, influencing factors, ways of medical intervention and evaluation indicators of cataract by observing changes in serum biochemical indices in mice with targeted disruption of βB2-crystallin. · METHODS: Nine 6-week-old male mice with targeted knockout of βB2-crystallin were used as the study group, and nine age- and sex-matched normal wild-type mice as the control group. The genetype of the modeled mice was identified by PCR technique. Tropicamide and phenylephrine eye drops were used as the cycloplegic agents to observe changes in lens opacity with a slit-lamp. The lens was then removed and blood was collected for biochemical evaluation in the serum. · RESULTS: Two genotypes were successfully identified by PCR technique. Slit-lamp observation showed that the lens cortex was opaque and GSH level in the lens cortex was remarkably decreased in mice with βB2-crystallin deficiency compared with the control group (P 0.05). · CONCLUSION: Compared with the wild-type mice, serum biochemical indices underwent significant changes in mice with targeted disruption of βB2-crystallin gene, especially with abnormal distribution of Na+&Ca2+, which induced the formation of cataract.

关键词： βB2-crystallin knockout cataract mice serum biochemistry

Influence of dissolved organic carbon on multimedia distribution and toxicity of fipronil and its transformation products in lotic waterways

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Journal of Environmental Sciences 2023年第8期130卷 52-64页

作者： Weizong li Hao Hu fen liu Huizhen li Jing You School of Environment and Guangdong Key Laboratory of Environmental Pollution and Health Jinan UniversityGuangzhou 511443China

Environmental fate and ecological impacts of fipronil and its transformation products(FIPs)in aquatic environment have caused worldwide attention,however,the influence of dissolved organic carbon(DOC)on multimedia distribution,bioavailability,and toxicity of FIPs in field waterways was largely ***,we collected 11 companion water and sediment samples along a lotic stream in Guangzhou,South *** were ubiquitous with total water concentrations ranging from 1.22 to 43.2 ng/L(14.8±12.9 ng/L)and fipronil sulfone was predominant in both water and *** than 70%of FIPs in aqueous phase were bound to DOC and the KDOC values of FIPs were approximately 1–2 orders of magnitude higher than K_(d-s)/K_(OC),emphasizing the significance of DOC in phase partitioning and transport of FIPs in aquatic *** and sediment samples were more toxic to Chironomus dilutus than Hyallela azteca,and FIPs(especially fipronil sulfone)pronouncedly contributed toxicity to *** units(TU)based on freely dissolved concentrations in water determined by solid phase microextraction significantly improved toxicity estimation of FIPs to the invertebrates compared to TUs based on aqueous *** present study highlights the significance of DOC association on fate and ecological risk of hydrophobic insecticides in lotic ecosystem.

关键词： Hydrophobic organic contaminant Bioavailability Partitioning Aquatic toxicity Passive sampler

Clinical observation of radical total gastrectomy without postoperative gastrointestinal decompression in elderly patients with gastric cancer

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International Journal of Nursing Sciences 2015年第1期2卷 47-51页

作者： Jin-xiu Hu Lun-lan li fen Dai He-ying Wu Department of Cadres Surgery The First Affiliated Hospital of Anhui Medical UniversityHefei 230022AnhuiChina Department of Nursing The First Affiliated Hospital of Anhui Medical UniversityHefei 230022AnhuiChina

Purpose:To investigate the safety and feasibility of radical total gastrectomy without postoperative gastrointestinal decompression in elderly patients with gastric ***:Elderly patients(65e80 years of age)hospitalized with gastric cancer from May 2009 to August 2012 were selected to receive radical total gastrectomy with(controls,n=39)or without(n=37)postoperative gastrointestinal *** recovery conditions and associated complications were observed and ***:In the group without decompression,the first passage of flatus post-operation was significantly earlier,and scores of nausea,pharyngitis,insomnia,and postoperative ambulation limitation were significantly reduced compared to controls(all plications between the ***:Gastrointestinal decompression is not necessary after total gastrectomy in elderly gastric cancer patients,and may improve patient comfort and recovery.

关键词： Gastrectomy Gastric cancer Gastrointestinal decompression Intubation