8-羟基喹啉对碘离子修饰的B-Z化学振荡体系的扰动

研究了用碘化钾溶液对B-Z化学振荡反应的修饰,以8-羟基喹啉为被检测化合物考察了修饰前后B-Z化学振荡体系对环境的敏感性变化.结果表明,修饰后的B-Z化学振荡体系对8-羟基喹啉的灵敏度大为提高,在2.50×10~(-9)～3.16×10~(-11)mol/L范围内,振荡体系的周期变化值与8-羟基喹啉浓度的负对数呈现良好的线性关系,相关系数为0.9980.     

钾镁胁迫对橡胶幼苗叶片物质成分影响的FTIR表征

养分亏缺是作物产量和质量提升的重要限制因子。我国砖红壤植胶区钾、镁缺乏及其低的有效性长期制约天然橡胶的产、质量。以“热研7-33-97”橡胶幼苗为研究对象,利用傅里叶变换红外光谱（FTIR）对钾、镁胁迫下橡胶树叶片物质组成特征进行研究,分析不同钾、镁胁迫条件下叶片红外光谱图谱特征峰的变化及其差异,探讨钾、镁胁迫对叶片物质成分和结构的影响,以期为钾镁缺乏影响橡胶树生长与生理代谢的机理研究提供参考。结果表明：（1）缺钾条件下,1 554,1 519和1 075 cm-1处的吸收峰缺失,表明橡胶叶片中蛋白质酰胺Ⅱ带、酚类物质、碳水化合物的化学结构受到破坏,并且其他特征峰吸光度与正常处理相比均有不同程度的升高,表明缺钾造成蛋白质、碳水化合物等物质在叶片中大量积累,物质转运效率降低;（2）缺镁条件下,1 554 cm-1处吸收峰向高频方向位移了6 cm-1,说明缺镁造成蛋白质酰胺Ⅱ带的结构发生改变,同时,1 550~1 350 cm-1波数范围内吸收峰相对吸光度明显下降,说明缺镁降低了细胞壁多糖以及含油脂化合物的含量,且该波数范围内的三个吸收峰较其他吸收峰变化敏感,表明该波段可以较好地指示橡胶叶片镁营养状况;（3）钾镁同时缺乏条件下,各吸收峰的相对吸光度和强度明显减弱,1 554,1 519和1 075 cm-1处的吸收峰缺失,说明蛋白质酰胺Ⅱ带、酚类物质、碳水化合物的化学结构受到破坏,1 057 cm-1处吸收峰向高频方向位移了11 cm-1,表明橡胶叶片中果胶类多糖分子结构发生了变化。综上所述,缺钾造成橡胶叶片蛋白质、糖类物质的含量的大量积累,缺镁造成叶片细胞壁多糖和油脂化合物下降,而钾镁同时缺乏时蛋白质、脂类、糖类物质等物质含量均明显下降。研究表明,使用FTIR技术对养分缺乏下的橡胶叶片物质成分定性分析具有一定的可行性,同时可为橡胶钾、镁营养生理代谢的机制研究提供新的思路和方法。     

Design of the new couplers for C-ADS RFQ

A new special coupler with a kind of bowl-shaped ceramic window for a proton linear accelerator named the Chinese Accelerator Driven System (C-ADS) at the Institute of Modern Physics (IMP) has been simulated and constructed and a continuous wave (CW) beam commissioning through a four-meter long radio frequency quadruple (RFQ) was completed by the end of July 2014. In the experiments of conditioning and beam, some problems were promoted gradually such as sparking and thermal issues. Finally, two new couplers were passed with almost 110 kW CW power and 120 kW pulsed mode, respectively. The 10 mA intensity beam experiments have now been completed, and the couplers during the operation had no thermal or electro-magnetic problems. The detailed design and results are presented in the paper.     

银行贷款利息的速算

随着商品经营的发展，企义经营的大部分资金要用银行贷款来解决。现在银行根据企业的经营状况划分一至四类企业。计算利息的档次也就不同，所以，银行的贷款利息也逐步被企业的经营者所重视。为使更多的经营者掌握计算贷款利息的方法，这里介绍一种积数速算银行贷款利息的方法。     

Highly sensitive polymer photodetectors with a wide spectral response range

A series of highly sensitive polymer photodetectors(PPDs) was fabricated with P3HT100-x:PBDT-TS1x:PC71BM1 as the active layers, where x represents the PBDT-TS1 doping weight ratio in donors. The response range of PPDs can cover from the UV to near-infrared regions by adjusting the PBDT-TS1 doping weight ratio. The best external quantum efficiency(EQE) values of ternary PPDs with P3HT:PBDT-TS1:PC_(71)BM(50:50:1 wt/wt/wt) as the active layers reach 830%, 720%,and 330% under 390-, 625-, and 760-nm light illumination and-10 V bias, respectively. The large EQE values indicate that the photodetectors utilise photomultiplication(PM). The working mechanism of PM-type PPDs can be attributed to interfacial trap-assisted hole tunnelling injection from the external circuit under light illumination. The calculated optical field and photogenerated electron volume density in the active layers can well explain the EQE spectral shape as a function of the PBDT-TS1 doping weight ratio in donors.     

元素-红外分析法测定海上油田含聚油泥中聚合物的含量

注聚驱油是海上油田高效开发的重要手段. 随着注聚产液量的提升,部分返出聚合物形成的含聚油泥堵塞流程,影响到采出液处理设备运行的问题亟待解决. 通过将含聚油泥中的油、泥、聚合物分离,联合运用元素分析、红外光谱（IR）、气相色谱、X射线衍射（XRD）、分光光度法对其组成进行分析,不同取样点的含聚油泥其主要组成是含油量为22.9%~42.12%,含水量为38.34%~62.3%,含固量为14.8%~19.54%. 其中聚合物含量为3.37%~7.42%,无机矿物含量1.30%~3.74%. 含聚油泥中的原油与SZ36-1标准原油组分一致,注入聚合物AP-P4性质没有发生变化,其结果对指导含聚油泥中原油、聚合物的回收利用研究和油泥分离技术开发有重要意义.     

元素分析仪-稳定同位素比值质谱仪测定胶乳总固形物碳含量及其稳定碳同位素

应用元素分析仪和稳定同位素比值质谱仪(EA-IRMS)联用技术测定了胶乳总固形物碳含量及其碳同位素比值δ~(13)C。将所采集的新鲜胶乳预先制成胶片,称取(0.500±0.100)mg样品,按EA仪器工作条件对其碳含量进行测定。分别用碳元素基准物质(尿素、天门冬氨酸、葡萄糖、蔗糖),在EA工作条件下测其碳元素,以碳质量为横坐标,CO_2峰面积为纵坐标制得标准曲线,结果表明其线性关系良好。对EA-IRMS系统作了稳定性和线性试验,前者达到小于0.1‰的要求,后者则满足同类仪器小于0.06‰·V~(-1)的要求。此外,还对Craig校正所得样品及3种CRMs的初始校正值作进一步校准的3种校准方法作了比较,结果表明:3种方法中回归法准确度最好,适用于不同性质、不同碳同位素组成的样品;而截距法只能用于碳同位素组成与参考气相近的样品的测量数据的校准;原始回归法则不能有效地消除测定过程中~(17)O的影响和样品燃烧过程中可能存在的同位素分馏的影响而不能用于结果校准。测得胶乳样品的总固形物碳质量分数为81.83%,δ~(13)C_(s-PDB)~M(PDB为国际标准拟箭石化石)为-26.70‰(回归法校准值)。     

Effects of proton irradiation at different incident angles on InAlAs/InGaAs InP-based HEMTs

InP-based high electron mobility transistors(HEMTs) will be affected by protons from different directions in space radiation applications. The proton irradiation effects on InAlAs/InGaAs hetero-junction structures of InP-based HEMTs are studied at incident angles ranging from 0 to 89.9° by SRIM software. With the increase of proton incident angle, the change trend of induced vacancy defects in the InAlAs/InGaAs hetero-junction region is consistent with the vacancy energy loss trend of incident protons. Namely, they both have shown an initial increase, followed by a decrease after incident angle has reached 30°. Besides, the average range and ultimate stopping positions of incident protons shift gradually from buffer layer to hetero-junction region, and then go up to gate metal. Finally, the electrical characteristics of InP-based HEMTs are investigated after proton irradiation at different incident angles by Sentaurus-TCAD. The induced vacancy defects are considered self-consistently through solving Poisson's and current continuity equations. Consequently, the extrinsic transconductance, pinch-off voltage and channel current demonstrate the most serious degradation at the incident angle of 30?, which can be accounted for the most severe carrier sheet density reduction under this condition.     

添加Ti对Al-Bi难混溶合金组织和性能的影响

难混溶合金在凝固过程中极易发生液-液相分离,造成第二相的宏观偏析,失去了合金的应用价值.本文将第三组元Ti添加到Al-Bi难混溶合金中,研究了Ti的添加对合金的凝固组织和性能的影响,探索了原位生成的金属间化合物的存在形式,分析了第二相Bi颗粒的分布.研究结果表明,凝固过程中原位生成的长针状Al_3Ti化合物,均匀分布在Al基体中,穿插在Bi相颗粒之间,阻碍了Bi相颗粒的沉降及凝并,防止了Bi相颗粒的碰撞及长大,制备了Bi相弥散分布在Al基体中的难混溶合金;同时弥散分布在基体中的硬质相Al_3Ti还增强了基体的强度,提高了合金的硬度,使合金表现出优异的耐磨性能.