两步蒸馏沉淀聚合法制备红霉素表面分子印迹聚合物及其性能研究

采用两步蒸馏沉淀聚合法,制备了红霉素表面分子印迹聚合物.第一步制备了甲基丙烯酸和二乙烯基苯共聚物微球(PMAA-co-DVB),将其作为内核,再通过第二步蒸馏沉淀聚合,以甲基丙烯酸(MAA)为功能单体,二乙烯基苯(DVB)为交联剂,偶氮二异丁腈(AIBN)为引发剂,红霉素(EM)为模板分子,内核表面聚合一层分子印迹膜层,从而制得具有"核-壳"结构的红霉素表面分子印迹聚合物.通过激光粒径测定、扫描电子显微镜以及结合实验对其形貌和结合性能进行表征.结果表明,在聚合物单体体积分数为7%时,制备出的PMAA-co-DVB微球形态良好,当EM与MAA的比例为1∶4,第二步蒸馏沉淀聚合中单体体积分数为2.8%时,所得的印迹材料结合性能最佳,对EM最大结合量为76.8 mg/g,结合达到平衡的时间为90 min.对红霉素的识别能力高于对其结构类似物罗红霉素.     

Lanostane Triterpenes from Ceriporia lacerate HS‐ZJUT‐C13A,a Fungal Endophyte of Huperzia serrata

Two new lanostane triterpenes, 3β‐acetoxy‐15α‐hydroxylanosta‐8,24‐dien‐21‐oic acid ( 1 ) and 3β‐acetoxylanosta‐7,9(11),24‐trien‐21‐oic acid ( 2 ), along with the four known analogs, 3 – 6 , were isolated from the culture broth of Ceriporia lacerate HS‐ZJUT‐C13A, a fungal endophyte residing in the stems of the traditional Chinese herb Huperzia serrata. The structures of the new compounds 1 and 2 were established by spectroscopic methods, including UV, IR, HR‐ESI‐MS, and extensive 1D‐ and 2D‐NMR techniques. To the best of our knowledge, this is the first report on triterpene metabolites from the genus Ceriporia.     

关于成本分摊的合作博弈方法

本文首先提出了成本分摊的合作博弈模型,并讨论了合作博弈的Shapley值方法在博弈满足凸性条件下的应用,最后提出了基于可分离及不可分离成本的分配方法及其适用的范围,并进行了算例分析.     

VO2薄膜对TEACO2激光响应特性的实验研究

报道了ＶＯ２薄膜在ＴＥＡＣＯ２激光照射下的相变特性的实验研究，结果表明：对于本文镀制的ＶＯ２薄膜，在偏置温度为５２℃条件下，ＴＥＡＣＯ２激光入射能量密度为１５０ｍＪ／ｃｍ＾２时，可使ＶＯ２薄膜发生相变，响应时间，５０ｎｓ，恢复时间≈２００μｓ。     

长焦距光学系统杂光系数测量的新方法及其理论分析

在分析现有杂光系数测量的基础上，提出了一种新的长焦距光学系统杂光系数测量的方法，并对这种方法进行了理论分析。     

PSL（2，F）的一个嵌入定理及其应用

设Ｆ是任意域，Ｇ代表ＳＬ（２，Ｆ）或ＰＳＬ（２，Ｆ）．本文的主要结果是：设Ｋ是Ｆ的子域，则Ｇ中同构于ＳＬ（２，Ｋ）或ＰＳＬ（２，Ｋ）的子群在Ｇ的自同构的作用下彼此共轭，利用这一结果，本文明确确定了A₁^[1]型的仿射Ｋａｃ－Ｍｏｏｄｙ群的一类极大正规子群．     

Infinite Rank Affine Lie Algebras

１．ＩｎｆｉｎｉｔｅＲａｎｋＡｆｉｎｅＬｉｅＡｌｇｅｂｒａｓｇ（Ｘ）ａｎｄｇ（Ｘ）ＷｅｒｅｃａｌｔｈｅｄｅｆｉｎｉｔｉｏｎｏｆｉｎｆｉｎｉｔｅｒａｎｋａｆｉｎｅＬｉｅａｌｇｅｂｒａｓａｎｄｔｈｅｉｒｆｕｎｄａｍｅｎｔａｌｓｔｒｕｃｔｕｒｅ．Ａｇｅｎｅ...     

Simple and Clean Synthesis：Tin—mediated Allylation of Carbonyl Compounds in Water

Tin-mediated allylation of aldehydes or ketones in distilled water gives rise to the corresponding homoallyl alcohols in higy yield without assistance such as heat ,supersonic and acidic media.     

A Two‐Dimensional Zirconium Carbide by Selective Etching of Al3C3 from Nanolaminated Zr3Al3C5

The room‐temperature synthesis of a new two‐dimensional (2D) zirconium‐containing carbide, Zr₃C₂T_z MXene is presented. In contrast to traditional preparation of MXene, the layered ternary Zr₃Al₃C₅ material instead of MAX phases is used as source under hydrofluoric acid treatment. The structural, mechanical, and electronic properties of the synthesized 2D carbide are investigated, combined with first‐principles density functional calculations. A comparative study on the structrual stability of our obtained 2D Zr₃C₂T_z and Ti₃C₂T_z MXenes at elevated temperatures is performed. The obtained 2D Zr₃C₂T_z exhibits relatively better ability to maintain 2D nature and strucural integrity compared to Ti‐based Mxene. The difference in structural stability under high temperature condition is explained by a theoretical investigation on binding energy.