目的探讨白细胞介素-6（Interleukin-6，IL-6）水平与我国手足口病（hand、foot and mouth disease，肝胁）的关系，为临床诊断和治疗提供科学依据。方法采用Meta分析方法对有关IL-6与我国手足口病关系的研究进行定量综合，估计综合效应...目的探讨白细胞介素-6（Interleukin-6，IL-6）水平与我国手足口病（hand、foot and mouth disease，肝胁）的关系，为临床诊断和治疗提供科学依据。方法采用Meta分析方法对有关IL-6与我国手足口病关系的研究进行定量综合，估计综合效应[标准化均数差（standardizedmeandifference，SMD）]及其95％可信区间。鳍果共纳入28篇文献，其中病例2251例，对照868例，Meta结果显示病例组IL-6浓度高于对照组，SMI）为1．41pg／mol，95％CI为1．06～1.75，两组差异有统计学意义（Z=8．03，P〈0．001）。亚组分析发现轻症vs．对照、重症vs．对照、重症vs．轻症SMD（95％CI）分别为1．23（0．77～1．69）、2．28（1．74～2．82）、1．17（0．64～1．69）pg／Z。结论IL-6可能参与了手足口病病理生理过程，且IL-6浓度越高，疾病越严重。展开更多
We present a first principle study of Cr-doped In2O3 system using density functional theory. The obtained results show that the Cr ion prefers the cation site of the center of trigonally distorted octahedron and conve...We present a first principle study of Cr-doped In2O3 system using density functional theory. The obtained results show that the Cr ion prefers the cation site of the center of trigonally distorted octahedron and converges to high spin-polarized configuration in the ground state. The hybridization between d-states and the donor states is strong, and the spin-split donor impurity-band model is found to be the most favorable mechanism for the ferromagnetism in this system. The good ferromagnetic property of high Curie temperature is discussed in view of the electronic structure analyses.展开更多
Band structure and bonding properties have been investigated in terms of periodic density functional theory（DFT） method,and two-photon absorption（TPA） spectra have been simulated by two-band model for ZnGeP2 and A...Band structure and bonding properties have been investigated in terms of periodic density functional theory（DFT） method,and two-photon absorption（TPA） spectra have been simulated by two-band model for ZnGeP2 and AgGaS2 crystals.It has been predicted that the AgGaS2 crystal has a wider window of nonlinear transmission,and the laser pumping energy larger than 1.02 and 1.35 eV will lead to deleterious TPA of higher nonlinear effect for ZnGeP2 and AgGaS2 crystals,respectively.Electron origin of TPA for them is also discussed.展开更多
Solid-state reaction of praseodymium （III） oxide,K2CO3 and MoO3 at high temperature leads to a potassium lanthanide double molybdate,namely,KPr（MoO4）2. The structural and optical properties of the title compound h...Solid-state reaction of praseodymium （III） oxide,K2CO3 and MoO3 at high temperature leads to a potassium lanthanide double molybdate,namely,KPr（MoO4）2. The structural and optical properties of the title compound have been investigated by means of single-crystal X-ray diffraction and spectroscopic measurements at room temperature. KPr（MoO4）2 crystallizes in tetragonal,space group I41/a with a = 5.401（3）,c = 12.044（10）,Z = 2 and R （I 〉 2σ（I）） = 0.0416. It features the famous scheelite-type structure （CaWO4）,which can be thought as the substitution of two Ca^2＋ ions in CaWO4 by a couple of K^＋ and Pr^3＋ ions in a statistical manner,and W^6＋ by Mo^6＋ cations.展开更多
文摘[目的]探讨农村老年人睡眠行为特点.[方法]采用分层整群随机抽样的方法,用匹兹堡睡眠质量指数量表、一般情况调查表等,对湖南省某县1 040例农村老年人进行调查.[结果]农村老年人一般晚上20：00许上床,早上6：30左右起床,每晚平均睡眠时间约4 h 30 min.入睡困难、睡眠维持困难和早醒者分别占51.1%、29.2%、62.8%.12.9%的老年人有午睡习惯.8.4%的老年人睡眠时相提前.[结论]农村老年人睡眠行为具有自身的特点,应针对其特点制定相应措施,提高当地农村老年人睡眠质量.
文摘目的探讨白细胞介素-6（Interleukin-6，IL-6）水平与我国手足口病（hand、foot and mouth disease，肝胁）的关系，为临床诊断和治疗提供科学依据。方法采用Meta分析方法对有关IL-6与我国手足口病关系的研究进行定量综合，估计综合效应[标准化均数差（standardizedmeandifference，SMD）]及其95％可信区间。鳍果共纳入28篇文献，其中病例2251例，对照868例，Meta结果显示病例组IL-6浓度高于对照组，SMI）为1．41pg／mol，95％CI为1．06～1.75，两组差异有统计学意义（Z=8．03，P〈0．001）。亚组分析发现轻症vs．对照、重症vs．对照、重症vs．轻症SMD（95％CI）分别为1．23（0．77～1．69）、2．28（1．74～2．82）、1．17（0．64～1．69）pg／Z。结论IL-6可能参与了手足口病病理生理过程，且IL-6浓度越高，疾病越严重。
基金the National Natural Science Foundation of China (No. 20373073)the National Basic Research Program of China (No. 2004CB720605)the Fund of Fujian Key Laboratory of Nanomaterials (No. 2006L2005)
文摘We present a first principle study of Cr-doped In2O3 system using density functional theory. The obtained results show that the Cr ion prefers the cation site of the center of trigonally distorted octahedron and converges to high spin-polarized configuration in the ground state. The hybridization between d-states and the donor states is strong, and the spin-split donor impurity-band model is found to be the most favorable mechanism for the ferromagnetism in this system. The good ferromagnetic property of high Curie temperature is discussed in view of the electronic structure analyses.
基金Supported by the National Natural Science Foundation of China (No. 20373073)the National Basic Research Program of China (No. 2007CB815307)+1 种基金the Funds of Chinese Academy of Sciences (KJCX2-YW-H01)Fujian Key Laboratory of Nanomaterials (No. 2006L2005)
文摘Band structure and bonding properties have been investigated in terms of periodic density functional theory（DFT） method,and two-photon absorption（TPA） spectra have been simulated by two-band model for ZnGeP2 and AgGaS2 crystals.It has been predicted that the AgGaS2 crystal has a wider window of nonlinear transmission,and the laser pumping energy larger than 1.02 and 1.35 eV will lead to deleterious TPA of higher nonlinear effect for ZnGeP2 and AgGaS2 crystals,respectively.Electron origin of TPA for them is also discussed.
基金Supported by the NNSFC (20373073)the National Basic Research Program of China (No. 2007CB815307)+2 种基金the Funds of CAS (KJCX2-YW-H01)Fujian Key Laboratory of Nanomaterials (No. 2006L2005)the Knowledge Innovation Program of CAS
文摘Solid-state reaction of praseodymium （III） oxide,K2CO3 and MoO3 at high temperature leads to a potassium lanthanide double molybdate,namely,KPr（MoO4）2. The structural and optical properties of the title compound have been investigated by means of single-crystal X-ray diffraction and spectroscopic measurements at room temperature. KPr（MoO4）2 crystallizes in tetragonal,space group I41/a with a = 5.401（3）,c = 12.044（10）,Z = 2 and R （I 〉 2σ（I）） = 0.0416. It features the famous scheelite-type structure （CaWO4）,which can be thought as the substitution of two Ca^2＋ ions in CaWO4 by a couple of K^＋ and Pr^3＋ ions in a statistical manner,and W^6＋ by Mo^6＋ cations.
