Synthesis and Applications of Carbon Dots

近年来,由于碳纳米材料具有高的催化活性以及好的稳定性等优点,其在科学、工程以及商业领域都得到了广泛的应用。其中新型“零维“碳纳米材料——碳量子点(CArbOn dOTS,CdS)具有荧光信号稳定、无光闪烁、激发波长和发射波长可调控等独特的光学性质,以及生物毒性小和生物相容性好等优势,逐渐成为碳纳米材料的研究热点,广泛应用于生物成像、生物细胞标记、传感器、光催化、太阳能电池以及发光元件等领域。本文主要综述了CdS的不同合成方法(包括自上而下法和自下而上法)及其应用。In recent years,nanomaterials have made an important impact on diverse science,engineering,and commercial sectors due to their high catalysis,lowcost,and good stability.Acting as a class of ‘zero-dimensional'carbon nanomaterials,carbon dots( CDs) possess unique optical properties of high photostability against photobleaching,tunable excitation and emission wavelength,as well as lowcytotoxicity and good biocompatibility.Therefore,CDs have become a hot subject of carbon nanomaterial in the past decade,not only for its unique properties but also for its applications in various fields such as bioimaging,biolabeling,sensors,photocatalysis,solar cells, light-emitting element and so on.This article reviews the different synthetic methodologies( including two classes: top-down and bottom-up) to achieve good performance of CDs.At the same time,the applications of CDs are also reviewed in the article.国家质检总局科技计划项目(No.2012QK053); 福建省质量技术监督局科技项目(No.3002A91429); 福建省高校产学合作科技重大项目(No.2012H6026); 福建省自然科学基金项目(No.2012D136); 福建省教育厅科技项目(No.JB14180)资助~

新疆白杨沟绵羊矛形双腔吸虫的研究

寄生在牛羊肝脏的双腔吸虫在国内各农牧区中形成流行区的有中华双腔吸虫(Dicr-ocoelium chinemis Tang et Tang,1978)、矛形双腔吸虫(D. lanceatum Stiles et Hassall,1896)及扁体矛形双腔吸虫亚种(D. lanceatum platynosomum Tang et al., 1980)它们在国内分布及危害情况曾有介绍(唐崇惕等,1980)。矛形双腔吸虫在国内有很大的分布区,也曾有人体病例报道。本吸虫的生活史虽已经阐明(Noller,1928;Voget,1929;Neu

Determination of Ge in Glossy Ganoderma by Complex Photometry

在表面活性剂CTMAb存在下,苯基荧光酮光度法测定灵芝中锗。工作曲线范围为0—1.2μggEO_2/Ml,样品分析rSd3.7%,回收率90—106%。In the presence of surFactant CTMAB, Ge in glossy ganoderma was determined by phenylFluorone photometry.Analysis range was 0-1.2ugGeo2/ml.RSD and recovery were 3.7% and 90-106% respectively

不同规格黑脊倒刺鲃的耗氧率和排氨率初步研究

本文研究了不同规格黑脊倒刺鲃的耗氧率和排氨率。实验在室内水族箱内进行,实验鱼按体重分成三种规格(187～245g,10.58～14.32g,1.96～2.95g),每个规格设三个平行组。实验结果表明,水温30℃时,黑脊倒刺鲃的平均耗氧率0.389mg/(g.h);氨氮排泄率1.608μmol/(g.h);O:N=15.49。不同规格对耗氧率和排氨率有显著影响(P<0.01)。耗氧率OR=0.6458W~(-0.1766)(r=0.9666),耗氧量M_0=0.6458W~(0.8233)(r=0.9984),排氨率NR=2.185W~(-0.0971)(r=0.7831),排氨量M_N=50.328W~(0.9038)(r=0.9959)。耗氧率和排氨率随规格增大而减小,耗氧量和排氨量随规格增大而增大

双啮合针齿凸轮分度机构模态分析与试验研究

为探究一种新型间歇机构——双啮合针齿凸轮分度机构的振动特性，考虑各零部件之间的复杂连接关系，建立机构有限元模型进行模态分析。提取有限元模型分别在分度期和间歇期的前六阶模态振型，最后对样机进行试验模态分析。对比发现试验模态分析固有频率与有限元计算结果相近，验证了有限元模态分析方法的可靠性。依间歇期的低阶频率，实际运转情况机构不会发生因输入引起的结构共振。通过模态分析为双啮合针齿凸轮机构振动特性分析，结构优化设计提供了试验支撑与理论依据