化学实验教学中培养中学生自我效能感的有效策略

自我效能感是指个体对自己是否能够成功地进行某一成就行为的主观判断。学生的自我效能感主要表现在其学习活动中,它是指学生在学习活动中对自己是否有能力完成学习任务和进行具体学习活动的能力的预测和估计,它体现了学生对自身学习的一种自信和期望。化学实验教学是化学教学的重要内容之一,它既受学生已有自我效能感的影响,又对于提高其自我效能感有重要作用。在化学实验教学中有效培养学生的自我效能感应该遵循若的干教学策略。     

Glu101对保持中心蛋白正常构象作用的研究——光谱法研究稀土离子与八肋游仆虫中心蛋白作用对蛋白构象的影响

通过位点直接突变法将八肋游仆虫中心蛋白101位保守的Glu突变成Lys,得到突变蛋白E101K.利用疏水性探针TN S研究了突变对Tb^3＋与蛋白作用时蛋白构象变化的影响.结果表明,相对于钙饱和的蛋白,铽的饱和对蛋白构象变化的影响更大.同时,共振光散射研究表明,Glu101对保持蛋白适当的构象变化行为起着至关重要的作用.     

把握机遇迎接挑战努力实现科技工作的新突破——在2007年全省科技工作会议上的讲话

这次会议的主要内容是，以科学发展观为统领，总结回顾2006年科技工作成绩和经验，传达全国科技工作会议精神，安排部署2007年科技工作。     

Neuroglobin mutation associated with hypoxia adaptation in Tibet chicken

Globin protein family plays an important role in storing and transporting oxygen. As a newly reported globin, the revealed function of neuroglobin includes binding and storing oxygen as well as facilitating the utilization of oxygen in neuronal cells. In the present study, mutations in exons of chicken Ngb gene were identified with the method of sequencing and created restriction site PCR in Tibet chicken and other four lowland chicken breeds. The mutations of Lys-2224(E4)-Asn and Ser-2279(E4)-Gly were identified in exon 4 of the gene. The Lys-2224(E4)-Asn mutation existed only in Tibet chicken and the mutation frequencies increased with increasing altitude. Analysis of the haplotype and diplotype of the two mutations in Tibet chicken populations of different altitudes showed that the frequencies of TG haplotype and TTGG diplotype also increased with increasing altitude, while the reverse tendency was found on GGAA diplotype. Under the hypoxic simulation incubation, the main haplotype was TG in living embryos and GA in dead embryos. The results showed that the Lys-2224(E4)-Asn mutation may be a specific mutation associated with hypoxia adaptation in Tibet chicken.     

Neuroglobin mutation associated with hypoxia adaptation in Tibet chicken

Globin protein family plays an important role in storing and transporting oxygen. As a newly reported globin, the revealed function of neuroglobin includes binding and storing oxygen as well as facilitating the utilization of oxygen in neuronal cells. In the present study, mutations in exons of chicken Ngb gene were identified with the method of sequencing and created restriction site PCR in Tibet chicken and other four lowland chicken breeds. The mutations of Lys-2224(E4)-Asn and Ser-2279(E4)-Gly were identified in exon 4 of the gene. The Lys-2224(E4)-Asn mutation existed only in Tibet chicken and the mutation frequencies increased with increasing altitude. Analysis of the haplotype and diplotype of the two mutations in Tibet chicken populations of different altitudes showed that the frequencies of TG haplotype and TTGG diplotype also increased with increasing altitude, while the reverse tendency was found on GGAA diplotype. Under the hypoxic simulation incubation, the main haplotype was TG in living embryos and GA in dead embryos. The results showed that the Lys-2224(E4)-Asn mutation may be a specific mutation associated with hypoxia adaptation in Tibet chicken.     

太白山蝗虫的垂直分布及区系分析

太白山的蝗虫有２总科、７科、３４种，分布于８个垂直带．以１３００～１８００ｍ的锐齿栎林带最多，７２０～１３００ｍ的栓皮栎林带次之，１８００～２３００ｍ的辽东栎林带居第三，７２０ｍ以下的农耕带为第四，２３００ｍ以上较少．其区系为古北界与东洋界过渡地带，以东洋界为主．     

螺旋叶片成形胎具的一种设计方法

运用解析几何方法，从等螺距旋面和螺旋线的参数方程入手，采用坐标系旋转等方面得出螺旋面的有关特性，并根据这些特性提出一种螺旋叶片水平形成胎具的设计方法，使一胎具即可压制多种导程的螺旋叶片。     

An Exact Logarithmic-exponential Multiplier Penalty Function

In this paper, we give a solving approach based on a logarithmic-exponential multiplier penalty function for the constrained minimization problem. It is proved exact in the sense that the global optimizers of a nonlinear problem are precisely the global optimizers of the logarithmic-exponential multiplier penalty problem.     

Fe3N和Fe2N体状化合物合成及其磁特性

纯铁粉在一定比例的氨和氢的气氛中与氮可以固气反应形成Ｆｅ３Ｎ和Ｆｅ２Ｎ体状化合物，研究了氨气和氢气的比例，温度和时间对反应产物的影响规律，进而确定了形成单一均匀的体状Ｆｅ３Ｎ和Ｆｅ２Ｎ化合物的条件，利用振动样品磁强计，磁天平和热磁分析等手段检测了Ｆｅ３Ｎ和Ｆｅ２Ｎ的磁特性Ｆｅ３Ｎ化合物饱和磁化强度（室温）为１３４Ａｍ＾２／ｋｇ居里温度为２６０℃而Ｆｅ２Ｎ化合物饱和磁化强度为２３．１Ａｍ＾２／ｋｇ属