一种考马斯亮蓝G-250快速染色法在SDS-PAGE中的应用

对SDS聚丙烯酰胺凝胶电泳中一种仅加入3mmol/L盐酸的考马斯亮蓝G-250染色液配合微波加热的快速染色方法的具体条件进行了研究.该方法能在1h内完成,比常规考马斯亮蓝R-250染色法短得多.同时未加入有机溶剂和其他酸,对人体几乎无害,对环境污染小.而其灵敏度与常规考马斯亮蓝R-250染色法相近,适于在实验教学和科研方面进行推广应用.     

粘土类干燥剂中富马酸二甲酯的GC-MS测定

富马酸二甲酯是八十年代开发的新型防霉防腐剂,因其具有化学稳定性好、广谱、作用时间长及适用pH范围宽等特点,被广泛用于食品、饲料、化妆品等各个行业中[1].由于富马酸二甲酯在常温下具有升华的特性[2],因此在家具、服装、食品中广泛应用的颗粒状粘土类干燥剂中,也常常添加富马酸二甲酯,以赋予干燥剂高效的防霉防腐功能.     

Plasmonic microcavity formed by the Möbius strip

We propose a Möbius-strip-type plasmonic cavity with a silver Möbius strip sandwiched between dielectric layers. By brief theoretical and simulation analyses, we obtain that the Q factor of the cavity remains about 40 and the mode volume is ultrasmall (less than 1 μm³) which is more compact than that of the cylindric cavity. This Möbius-strip-type plasmonic cavity supporting the propagation of surface plasmon polaritons owns some unusual properties such as more effective volume and the spatial separation. More potential applications based on this cavity remain to be explored in future nanophotonics.     

顶空固相微萃取法分析安吉白茶香气成分

以安吉白茶为研究对象,采用全自动顶空-固相微萃取(Headspace solid-phase microextraction,HS-SPME)提取其香气物质,用气相色谱-质谱法(GC-MS)鉴定香气组分,并采用色谱峰面积归一化法计算各成分的相对百分含量.结果在安吉白茶中检出香气成分73个,占挥发性成分总量的95.59％,主要以酯类(30.17％)、醇类(27.75％)、酮类(13.75％)和碳氢化合物(9.24％)为主.安吉白茶的香气成分主要是十六烷酸甲酯、香叶醇、十六烷酸、亚麻酸甲酯、植醇、植酮、二氢猕猴桃内酯、亚油酸甲酯、β-紫罗酮、雪松醇、茉莉酮、橙花叔醇、芳樟醇、咖啡因、香叶基丙酮等.     

教学重心下移的案例研究

新课程的核心理念是为了每一位学生的发展.课程要着眼于学生的发展,就必须做到教学重心下移,这是课程价值取向定位问题.在如何处理经济发展、社会发展与人的发展的关系上,新课程定位在人的发展上,具体指向以能力和个性为核心的发展.“双减”政策的出台,进一步强化了人的发展.从某种意义上讲,“双减”就是“双还”,即把学习的时间和空间还给学生.     

Kinetic evolutionary behavior of catalysis-select migration

We propose a catalysis-select migration driven evolution model of two-species(A-and B-species) aggregates,where one unit of species A migrates to species B under the catalysts of species C,while under the catalysts of species D the reaction will become one unit of species B migrating to species A.Meanwhile the catalyst aggregates of species C perform self-coagulation,as do the species D aggregates.We study this catalysis-select migration driven kinetic aggregation phenomena using the generalized Smoluchowski rate equation approach with C species catalysis-select migration rate kernel K(k;i,j) = Kkij and D species catalysis-select migration rate kernel J(k;i,j) = Jkij.The kinetic evolution behaviour is found to be dominated by the competition between the catalysis-select immigration and emigration,in which the competition is between JD0 and KC0(D0 and C0 are the initial numbers of the monomers of species D and C,respectively).When JD0 KC0 > 0,the aggregate size distribution of species A satisfies the conventional scaling form and that of species B satisfies a modified scaling form.And in the case of JD0 KC0 < 0,species A and B exchange their aggregate size distributions as in the above JD0 KC0 > 0 case.     

堆芯三维在线监测系统SOPHORA的实现与验证

SOPHORA是中广核集团自主研发的基于堆内固定式探测器（FID）的堆芯三维在线监测系统。根据测量的FID读数和堆芯状态参数,结合堆芯核设计软件COCO和热工子通道分析软件LINDEN,SOPHORA重构出最佳估算的三维功率分布,并给出功率峰值裕量和热工DNB裕量等重要运行参数。以某三环路电站的可移动式探测器（MID）实际测量数据为基础,模拟FID测量数据作为SOPHORA的输入。从SOPHORA的功率峰值（Fq,Fdh,Fz,DNBR）的输出结果与中广核集团自主研发的MAPLE通量图处理软件的实测功率峰值进行对比,Fq,Fdh,Fz的平均偏差分别为0.7%,0.13%,0.4%,DNBR的最大偏差仅1.4%,该结果表明,SOPHORA的堆芯三维功率重构的结果是合理可信的。