Effect of ZnF2 Coating on Performance of LiNi0.5Mn1.5O4 Cathode Material for Lithium-ion Batteries

采用溶胶-凝胶法制备了LiNi0.5Mn1.5O4正极材料，并利用Zn F2对其表面进行包覆改性。XRD、SEM和TEM测试表明，包覆处理不影响材料的晶体结构，2%(质量分数，以LiNi0.5Mn1.5O4质量计，下同)的Zn F2在LiNi0.5Mn1.5O4表面形成了约7 nm厚均匀包覆层。对未包覆的LiNi0.5Mn1.5O4和1%、2%、3%的Zn F2包覆后的LiNi0.5Mn1.5O4的电化学性能进行了考察，发现Zn F2包覆能够减弱电解液与LiNi0.5Mn1.5O4正极材料之间的相互作用，稳定电极表面，提高材料的电化学性能。其中，2%Zn F2包覆样品表现出最佳的循环性能和倍率性能，0.2C电流倍率下循环200圈后，其放电比容量维持在109.0 m A·h/g，保持率为79.7%；5 C电流倍率下循环500圈后，放电比容量维持在94.2 m A·h/g，保持率为85.6%

Construction and identification of interference plasmid targeting on TNFAIP8

目的:构建并筛选出干扰效率最佳的TnfAIP8-SHrnA-P SIrEn-rETrO Q干扰质粒。方法:通过生物软件选择3个TnfAIP8基因干扰位点,构建干扰质粒并测序验证,将干扰质粒及对照质粒分别转染至A549细胞,通过rT-PCr、WESTErn blOT检测干扰效率。结果:经rT-PCr和WESTErn-blOT证实TnfAIP8-SHrnA-P SIrEn-rETrO Q干扰质粒能有效干扰并抑制细胞内TnfAIP8基因的表达,通过流式检测发现降低TnVAIP8表达可以提高细胞对A dr5SC fV诱导凋亡的敏感性。结论:成功构建和设计了对TnfAIP8基因具有显著干扰效率的干扰质粒,为进一步研究TnfAIP8基因的功能奠定了基础。Objective: To construct and screen the high efficiency interference plasmid of TFAIP8-shRNA-p SIRENRetro Q.Methods: Selected and synthesized three Target Sequence of TNFAIP8 shRNA1,TNFAIP8 shRNA2,TNFAIP8 shRNA3,and construct the TNFAIP8 interference plasmid.Transfection TNFAIP8-shRNA-p SIREN-Retro Q interference plasmid to A549 cells.Filter out the highest interference efficiency plasmid by detecting the mRNA and protein levels using RT-PCR and Western blot methods.Results: We successfully design and built three TNFAIP8-shRNA-p SIREN-Retro Q interference plasmids,and screen out the highest efficiency interference plasmid.Conclusion: Three interference plasmids targeting the TNFAIP8 gene have been constructed successfully and provide a useful tool for studying the function of TNFAIP8.国家自然科学基金项目(81272720); 福建省卫计委医学创新课题(2014-CXB-43); 厦门市科技计划项目(3502Z2083008)资

Biological Traits of Three Gastrodia elata Variants in the Flowering Period

在天麻开花时,对略阳红秆、绿秆、乌秆天麻3种变型的花果期,花茎、花被筒及子房的长度,果实、种子及胚的长度、宽度等进行了观察研究,结果发现:天麻的这3种变型在每个方面都有一定的差异,乌秆天麻花茎最高,果实和种子最长,开花、结果日期最晚;红秆天麻花序轴、每株结果数、果实重量和种子直径最大,开花、结果日期最早;绿秆天麻花、果期最短,而胚的长度和直径却最大

STUDIES ON THE FEEDING AND NUTRITION ofPACROSOMUS MAJOR LARVAE

真鲷幼体摄食与营养研究结果表明：真鲷幼体的日摄食具有明显的昼夜节律性。白天的摄食强度大于夜间，早晨及傍晚分别出现日摄食的两个高峰。葡萄糖为真鲷幼体生长的重要能源物质之一，主要贮存于幼体的肌肉和肝脏中。氨基酸是幼体生长的重要物质，真鲷幼体体内必需氨基酸的可能种类有11种。Feeding and nutrition of P.major larvae were studied by diet rducing method and carbon-14 isotopic tagging technique.The resulte shoued thatFeeding rhythemicity of P.major larvae was obviously.The Feeding intensity wasstronger in daytime(above 80%)than at night.Two strongest Feeding periodswere in the morning and at nightFall.Glucose provided energy For the growth ofP.aam larvae and wag stored in liver and muscles.Amino acid was one of theimportant substanced For the growth of P.major larvae and there were elevenkinds of essential amino acid For P.major larvae

PM_(2.5) in Northern Coastal Area of Shandong Peninsula: Correlation between Its Acidity and Chemical Composition in Winter

To investigate the acidity variation characteristics of fine particulate matter (PM_(2.5)) in the areas down-wind of Jing-Jin-Ji region in winter, the Qimu Island Environmental Monitoring Station, situated in Shandong peninsula, conducted a PM_(2.5) sampling project for the period from 3 January-11 February, 2014 according to the sample collection schedule: one sampling every 12 hours. The analytic results of the samples showed that the average mass concentrations of PM_(2.5) during the sampling period were (77.1&plusmn;58.7) &mu;g/m~3; the total content of water soluble ions including SO_4~(2-), NO_3~-, Cl~-, NH_4~+, Ca~(2+), K~+, Na~+ and Mg~(2+) accounted for (37.3&plusmn;16.3)% of PM_(2.5) mass, among others, the share of SO_4~(2-), NO_3~-and NH_4~+ were the most, and no obvious variation of the contents of PM_(2.5) and the ions was noted day and night, but the variation was comparatively remark- able according to the trajectory classification of clustered air mass. On the basis of the assessment by the ion balance method and modeling of ISORROPIAⅡ, total acidity and in-situ acidity were (309&plusmn;544) nmol/m~3and (193&plusmn;292) nmol/m~3, respective- ly, and no notable variation of total acidity of PM_(2.5) was observed for the day and night but the change was significant according to classified clustered air mass. The M-K test indicated that acidity decreased when the 2nd class clustered air mass oc- curred, and the linear regression analysis suggested that it was the in-situ acidity that notably influenced the total acidity and the water content in PM_(2.5) was unlikely the main factor that restricted acidity of PM_(2.5).</p

Effects of DKPs on Gene Expression of the Antibacterial Substances in Bacillus amyloliquefaciens Q-426

目的:解淀粉芽孢杆菌Q-426在其生长过程中能够产生芬枯草菌素、依枯草菌素、枯草杆菌素等多种脂肽类抗菌物质。利用实时荧光定量PCR的方法考察细菌群体感应信号分子二酮哌嗪类化合物(diketopiperazines,DKPs)对脂肽类抗菌物质合成的调控作用。方法:当Q-426菌进入对数生长期中期,向发酵液中加入终浓度为5 mg/L的DKPs,并继续培养至48 h,并利用实时荧光定量PCR的方法进行抗菌物质mRNA表达水平的定量分析。结果:二酮哌嗪类化合物能够抑制抗菌活性物质相关基因的表达。 &nbsp

Research of Acoustic Wave's Effect and Impact on Marine Organism

本文研究了声波对某些海洋生物的影响与作用。实验表明 ,适当的声波剂量对海洋生物的作用所产生的声学生物效应是积极的 ,可促使生物体向有利的方向产生变异 ,而强度过大的声波对海洋生物有致伤甚至致死的效应In this paper, acoustic wave's effect and impact on marine organism is researched. Experiments show that while ultrasonic biology effect of moderate dose of acoustic wave plays an active role by promote marine organism's favorable variation, overdose acoustic wave can hurt or even kill marine organism.福建省自然科学基金资助项

ZnF2包覆对锂离子电池正极材料LiNi0.5Mn1.5O4性能的影响

采用溶胶-凝胶法制备了LiNi0.5Mn1.5O4正极材料，并利用Zn F2对其表面进行包覆改性。XRD、SEM和TEM测试表明，包覆处理不影响材料的晶体结构，2%(质量分数，以LiNi0.5Mn1.5O4质量计，下同)的Zn F2在LiNi0.5Mn1.5O4表面形成了约7 nm厚均匀包覆层。对未包覆的LiNi0.5Mn1.5O4和1%、2%、3%的Zn F2包覆后的LiNi0.5Mn1.5O4的电化学性能进行了考察，发现Zn F2包覆能够减弱电解液与LiNi0.5Mn1.5O4正极材料之间的相互作用，稳定电极表面，提高材料的电化学性能。其中，2%Zn F2包覆样品表现出最佳的循环性能和倍率性能，0.2C电流倍率下循环200圈后，其放电比容量维持在109.0 m A·h/g，保持率为79.7%；5 C电流倍率下循环500圈后，放电比容量维持在94.2 m A·h/g，保持率为85.6%