生物磁学与生活

生物磁学是一门正在迅速发展的科学技术,它与人体及其他生物体有着密切关系,生物磁场和磁性可反映生物体内的生理和病理的信息,而外磁场对人体及生物体的生长,发育和代谢等生命活动也会产生影响.     

廉价烷基苯石油磺酸盐KPS-2的合成与性能评价

将两种不同的馏分油复配，通过三氧化硫磺化，经碱皂化后得到烷基苯石油磺酸盐KPS-2。本方法不用乙醇萃取等后处理工艺，合成条件易控制，产品性能稳定，油水界面活性好，抗碱能力强，适用范围广，成本低。以KPS-2为主的三元复合体系(0．3％KPS-2／1．5％Na2CO3／0．15％HPAM)，在室内驱油模型上进行驱油实验，提高原油采收率可达20％。     

Heteroheptacene-based acceptors with thieno[3,2-b]pyrrole yield high-performance polymer solar cells

Rationally utilizing and developing synthetic units is of particular significance for the design of high-performance non-fullerene small-molecule acceptors (SMAs). Here, a thieno[3,2-b]pyrrole synthetic unit was employed to develop a set of SMAs (ThPy1, ThPy2, ThPy3 and ThPy4) by changing the number or the position of the pyrrole ring in the central core based on a standard SMA of IT-4Cl, compared to which the four thieno[3,2-b]pyrrole-based acceptors exhibit bathochromic absorption and upshifted frontier orbital energy level due to the strong electron-donating ability of pyrrole. As a result, the polymer solar cells (PSCs) of the four thieno[3,2-b]pyrrole-based acceptors yield higher open-circuit voltage and lower energy loss relative to those of the IT-4Cl-based device. What is more, the ThPy3-based device achieves a power conversion efficiency (PCE) (15.3%) and an outstanding fill factor (FF) (0.771) that are superior to the IT-4Cl-based device (PCE = 12.6%, FF = 0.758). The ThPy4-based device realizes the lowest energy loss and the smallest optical band gap, and the ternary PSC device based on PM6:BTP-eC9:ThPy4 exhibits a PCE of 18.43% and a FF of 0.802. Overall, this work sheds light on the great potential of thieno[3,2-b]pyrrole-based SMAs in realizing low energy loss and high PCE.     

镜对称及矢势的简单推导

对于某些电流分布与磁场分布,本文应用镜对称操作原理及Ｓｔｏｋｅｓ定理简单推导其矢势Ａ→。     

高分子材料与工程专业实践教学改革研究

介绍了河南工业大学高分子材料与工程实践教学改革的成果,提出了"三个培养阶段,四个层次"的新型实践教学体系,通过增加实习实践环节课时,提高综合性、设计性和研究性实验的比例等措施培养学生的创新能力。     

新型高分子／层状氧化物纳米复合导电材料

介绍了一种新型高分子／层状氧化物纳米复合导电材料．简述了制备此类导电材料的三种基本方法．     

物探技术在煤田火区探测中的应用

煤矿自燃火灾的火源隐蔽,给灭火工作带来困难,控制煤田自燃火灾的关键是准确探测火区范围及燃烧中心,为灭火工作提供依据。采用物探方法进行火区探测,具有速度快,能够确定火区燃烧中心位置的优点。钻探验证结果表明,依靠磁法确定火区着火点深度误差小于20%。     

有机聚合物电致发光材料研究进展

通过对目前研究较多的几种有机聚合物电致发光材料及其器件的发光性能进行了综述,说明有机电致发光材料具有轻便、柔性强、易加工等优点及广阔的应用前景。     

由吡嗪-2,3-二甲酸构筑的镉的配位聚合物的水热合成及晶体结构

采用水热法合成了一维配位聚合物[Cd（pzdc）（H2O）3]n（H2pzdc=吡嗪-2,3-二甲酸）.并对其进行了元素分析、红外光谱表征和X射线单晶衍射测定.该配合物属于正交晶系,空间群P 2（1）2（1）2（1）,晶胞参数a=5.7341（4）,b=10.8279（7）,c=15.3484（10）,V=952.96（11）3,C6H8CdN2O7,Mr=332.54,Dc=2.318g/cm3,μ（MoKα）=2.317mm-1,F（000）=648,Z=4,R1=0.0162,wR2=0.0449.     

MRS study on lentiform nucleus in idiopathic Parkinson''s disease with unilateral symptoms

Objective: To investigate changes in magnetic resonance spectroscopy (MRS) of lentiform nucleus during the early stage of Parkinson's disease. Methods: Twenty-five patients with idiopathic Parkinson disease with unilateral symptoms (IPDUS) and 25 healthy volunteers were enrolled in this study. MRS of the lentiform nucleus in each patient was taken and then concentrations of N-acetylaspartate (NAA), Creatine (Cr) and Choline (Cho) were calculated. Results: Compared to that in the control, NAA/(Cho Cr) was significantly lower in the lentiform nucleus contralateral to symptoms and even that in the ipsilateral side in IPDUS patients (all P＜0.05); while there was no difference between the two sides in the healthy volunteer (P＞0.05). The ratio of NAA/(Cho Cr) ipsilateral to the sympatomatic side of the patient was also lower than that of the control (P＜0.05). Conclusions: there might be some changes with MRS on the lentiform nucleus during the early stage of idiopathic Parkinson's disease with unilateral symptom. MRS may be one of the reliable methods for early or even sub-clinical diagnosis.