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  • 简介:终于离宝藏越来越近了,吉姆也面临险境,他们最后能成功吗?请看——

  • 标签: 高中 英语 课外阅读 教材
  • 简介:私家侦探塞缪尔刚刚接触加菲尔德小姐失踪案,就遭到了威胁。可随着新线索不断地被发现,塞缪尔来到了迈尔代理公司,在这里他会有所收获吗?

  • 标签: 高校 英语 课外阅读 阅读材料
  • 简介:在夏威夷待了这么久,Lala和我都晒黑了!虽然很想一直在这个美丽的岛屿待下去,但是我们的旅行还是要继续。在夏威夷的时候我和Lala遇到不少带着孩子来玩的美国家庭,他们向我们推荐了一个有趣的地方——迪士尼乐园!

  • 标签: 小学 英语教学 教学方法 阅读教学
  • 简介:合成一系列关于Eu(III)/Gd(III)与2-噻酚甲酰三氟丙酮(HTTA)、苯甲酸(BA)和邻菲罗啉(Phen)的配合物,并对这配合物进行元素、红外与荧光光谱分析.结果表明:这些配合物的组成为Eu1-x,Gdx(BA)-(TTA)2Phen(x=0~1),配合物Eu(BA)(TTA)2Phen比配合物Eu(TTA)3Phen具有更宽的激发带,且激发带发生明显的蓝移.说明新的配合物已经生成.共发光Gd^3+离子对配合物Eu1-xGdx(BA)(TTA)2Phen的荧光增强非常明显,最佳Gd^3+离子浓度为0.4(摩尔分数).配合物Eu1-xGdx(BA)(TTA)2Phen荧光增强的主要机理是Eu(BA)(TTA)2Phen与Gd(BA)(TTA)2Phen配合物分子间的能量传递.

  • 标签: 荧光性质 苯甲酸 2-噻酚甲酰三氟丙酮
  • 简介:AbstractThe Draf Ⅲ procedure involves the creation of a common frontal sinus cavity. The most common indication for the Draf Ⅲ procedure is chronic rhinosinusitis of the frontal sinuses despite the failure of more conservative interventions such as bilateral Draf Ⅱa procedures. Primary Draf Ⅲ may be indicated in patients with a high risk of failures such as those with severe polyposis and those with a frontal sinus opening less than 4 mm on computed tomography imaging. Other indications for the Draf Ⅲ include access for tumor removal and repair of traumatic fractures of the frontal sinus. The "inside-out" Draf Ⅲ procedure is the standard approach when the frontal recess anterior-posterior diameter is wide enough for instrument access, usually larger than 4-5 mm. The "outside-in" Draf Ⅲ procedure can be done when the frontal recess is too narrow to safely accommodate instruments. Regular follow-up with debridement should be done to prevent neo-ostium stenosis.

  • 标签: Draf III endoscopic modified Lothrop procedure endoscopic sinus surgery frontal sinus surgery
  • 简介:Thesorptionbehaviorandmechanismofanovelchelateresin,diglycolamidicacidresin(DAAR),forSm(lll)wereinvestigated.TheoptimalsorptionconditionofDAARforSm(lll)ispH=6.0inHAc-NaAcmedium.Thestaticallysaturatedsorptioncapacityis190mg/gresinat298K.TheSm(lll)adsorbedonDAARcanbeelutedreaching100%by0.5-2.0mol/LHCIusedaseluant.Theresincanberegeneratedandreusedwithoutapparentdecreaseofsorptioncapacity.Theapparentsorptionrateconstantisk298=1.96×10^-5s^-1.Theapparentactivationenergyis26kJ/mol.ThesorptionbehaviorofDAARforSm(lll)obeystheFreundlichisotherm.Thethermodynamicsorptionparameters,enthalpychangeΔHofDAARforSm(lll)is16.9Kl/mol.ThemolarcoordinationratioofthefunctionalgroupofDAARtoSin(111)is3.ThesorptionmechanismofDAARforSm(lll)wasexaminedbyusingchemicalmethodandIRspectrometry.ThecoordinationbondwasformedbetweenoxygenatomsinthefunctionalgroupofDAARandSin(Ill).

  • 标签: 吸附剂 钐(III) 亚氨基二乙酸树脂 吸附机理 合成 表征
  • 简介:BaoTianren(包天仁,以下简称BAO):Goodmorning.Gary,it蒺stheChineseNewYear,anditissonicetoseeyouagainonthecampusofBrightonUniversity.SpeakingoftwomajorbigorganizationsinELT,IattendtheIATEFLinternationalconferenceeveryyear,buttheTESOLonesoccasionally.

  • 标签: with the of The IATEFL EVERY
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  • 简介:摘要现在随着科学技术的不断进步,皮肤胶原的相关深入研究为治疗烧伤等创面的修复提供了新技术。

  • 标签: 胶原 创面修复