关于“啃老族”的若干思考

近年来,我国的"啃老族"队伍越来越壮大,不仅不利于年轻人的成长,还带来巨大的社会隐患,已成为一个不容忽视的社会问题。"啃老族"的出现,有极其复杂的原因,一方面是"啃老族"自身的原因,另外也有家庭、教育、社会等方面的原因。笔者认为要解决"啃老"这一社会问题,需要家庭、学校、政府、社会等方面的密切配合、共同努力,才能根本解决。     

随书光盘机读目录的编目探讨

为加强随书光盘的开发与利用, 本文就随书光盘的特点、机读目录格式及编目中的一些问题进行了探讨.     

论行政赔偿范围的扩大

对我国目前的行政赔偿范围进行了反思。认为我国现行的《国家赔偿法》主要以列举方式确定的行政赔偿范围,极大限制了行政赔偿范围。建议采取“概括加否定排除式”的立法模式扩大行政赔偿范围,将行政规章以下的抽象行政行为、行政不作为行为和精神损害赔偿纳入行政赔偿范围。     

论党的执政方式向依法治国的转变

实现学的执政方式向依法治国的转变，既要坚持和加强党的领导，更需要全党转变观念，变革领导方式，提高执政水平。     

Field emission of comb-like chromium disilicide nanowires prepared by an in situ chloride-generated route

Large-area comb-like chromium disilicide (CrSi₂) nanowire film has been successfully synthesized on silicon wafer through an in situ chloride-generated route. The sample possesses branch-like nanowires grown out perpendicularly and evenly from both sides of a stem-like microrod, forming 2-fold comb-like hierarchical nanoarchitectures. The formation mechanism of the sample could be understood by a secondary nucleation process occurring on the surface of the firstly formed CrSi₂ microrod, followed by epitaxial growth of branch-like nanowires under conditions of proper temperature and sufficient vapor supply in the reaction system. The field-emission behavior of the sample shows a low turn-on field of 5.3–6.5 V/μm at anode-sample distances of 200–400 μm, and agrees well with the conventional Fowler–Nordheim theory. No obvious degradation was observed in a life stability experiment period for over 100 min. The relationship between the field enhancement factor and anode-sample distance follows a universal equation, developed within a two-region field-emission model. The convenient and low-cost preparation of the comb-like CrSi₂ nanowires and their remarkable field-emission performance suggest that they can serve as good candidates for field-emission applications.     

任务驱动法在C语言教学中的应用

针对C语言教学中学生思维难以转换，易产生畏难情绪，动手能力差的问题，将任务驱动法应用到Ｃ语言的教学中，激发学生学习的兴趣，培养学生的探索精神和创造性思维，提高学生的实践操作能力，以适应社会对高素质技能型人才的要求。文中详细分析了基于任务驱动法的Ｃ语言教学设计和任务驱动法在实施中的注意事项。     

Editor’s note

The coastal zone spans both land and water, extending landward up to the highest water line that occurs on shore during storms and seaward to the point at which storm waves no longer move sediments on the seafloor. The specific contact line between land and sea is the shoreline and adjacent land is considered     

单体性质对樟脑醌/胡椒环光引发活性的影响

采用实时红外光谱仪(RT-FTIR)研究了单体结构、单体配比以及活性稀释剂结构对樟脑醌(CQ)/胡椒环(BDO)引发的光聚合动力学的影响,结果发现,UDMA虽然黏度较低,但是易发生链转移反应且在聚合体系中含量较高(70 wt%),可作为氢给体猝灭激发态CQ,从而影响CQ和BDO之间的相互作用.Bis-GMA虽然黏度大,但是反应活性高,当其与少量具有给氢能力的活性稀释剂TEGDMA配合使用时,不仅对聚合体系的反应活性影响较小,而且可显著降低体系的黏度,大大提高自由基的活动能力,有利于改善CQ/BDO的引发活性.     

Rational Design of an Ultrasensitive and Highly Selective Chemodosimeter by a Dual Quenching Mechanism for Cysteine Based on a Facile Michael‐Transcyclization Cascade Reaction

Differentiation of biologically important thiols, such as cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) is still a challenging task. Herein, we present a novel fluorescent chemodosimeter capable of selectively detecting Cys over other biothiols including Hcy and GSH and other amino acids by a facile thiol‐Michael addition/transcyclization rearrangement cascade click process. The unique transcyclization step is critical for the selectivity as a result of the kinetically favorable formation of a six‐membered ring with the Cys Michael adduct. Moreover, the probe adopts a distinctive dual quenching mechanism—photoinduced electron transfer (PET) and photoinduced intramolecular charge transfer (ICT) to deliver a drastic turn‐on fluorescence response only at the Cys‐selective transcylization step. The judicious selection of strong electron‐withdrawing naphthalimide fluorophore with maleimide group enhances the electrophilicity and thus reactivity for the cascade process leading to fast detection and ultrasensitivity with a detection limit of 2.0 nm (S/N=3). The probe has demonstrated its practical utility potential in Cys imaging in live cells.