蓝色圆珠笔油墨紫外光照射变化的研究

在紫外光照射下，通过对蓝色圆珠笔字迹色痕ＦＴ－ＩＲ显微光谱的研究。发现溶剂挥发迅速。其次是环氧树脂的聚合、交联；三苯甲烷染料的分解比较缓慢；而醇酸树脂相对稳定。该研究为字迹色痕的进一步分辨提供了新方法，同时为字迹色痕的“年龄”推断奠定了基础。选用相关峰的相对峰高比来描述这一变化，并进行曲线拟合，消除了因笔力不同而引起的油墨流出量不同造成的误差，这在实际工作中是很有意义的。     

Finite-Width Correction to Form Factors of γγ^＊→ π^0 Transition

Instead of the usual zero-width approximation for one resonance, we use the finite-width approximation for the two low resonances, i.e. the ρ- ω mesons, to investigate the light-cone local QCD sum rules for the form factor of the transition γγ^＊→ π^0 ,According to the method of the analytic continuation by duality, the weight function, the polynomial of a low order N, is added to the dispersion integral to annihilate the integrand in the region where both resonance saturation and the QCD asymptotic expression are least reliable. The resultant form factor in the cases for the zero- and finite-widths are almost the same, both agree well with the experimental measurements. A comparison with the result from the Laplacian transformed light-cone sum rules and a brief discussion are given.     

伊红探针可视化检测牛奶中环丙沙星残留

基于伊红和环丙沙星离子缔合形成二元复合物后,溶液颜色由琥珀色转变成玫红色,构建了以伊红为探针的环丙沙星定量可视化检测体系。对缔合物的组成比进行了确认,对溶液pH、伊红用量进行了优化。在最优实验条件下,体系在540 nm,环丙沙星浓度在5～17μmol/L范围内与吸光度呈良好线性关系,检出限为3.57μmol/L,裸眼观察的检出限为2μmol/L。方法应用于实际样品牛奶中环丙沙星检测时,回收率在91.5%～97.0%之间,相对标准偏差(RSD)小于5.4%。方法适用于动物源性食品中环丙沙星的快速筛查。     

固相微萃取技术在法庭科学领域中的应用

综述国内外固相微萃取技术在法庭科学领域中毒物、毒品和微量物证(炸药残留物、助燃剂残留物、人体气味)样品前处理及分析中的应用,以及在火场助燃剂残留物及人体气味鉴别方面的应用;对固相微萃取技术在法庭科学领域中的发展方向进行了展望。可以对法庭科学领域毒物毒品、微量物的相关研究和侦查办案提供参考。     

多语言编程技术在软件开发中的应用

在地球物理资料综合处理解释系统的开发过程中，如何利用多种语言混合编程技术解决用不同编程语言开发的程序的相互联接问题，并简述了AFORTRN语言与C＋＋语言的部分联接过程。     

电磁量计随爆轰波运动惯性性质的二维数值模拟

 利用二维非线性有限元动力分析程序,对金属电磁测速量计在爆轰波质速测量中随爆轰波运动的惯性性质进行了二维数值模拟。     

邻二氮菲双波长分光光度法测定牙膏中微量铁

用邻二氮菲作显色剂光度法测定铁(Ⅱ)早有报导。但由于牙膏成分复杂,试样直接用酸分解所得溶液往往带有浑浊,给光度测定造成困难。对此,一般采用两种方法处理:(1)高温灼烧试样,所得灰份溶解于酸中,然后显色、测量;(2)直接用酸分解试样,所得浑浊液用标准加入法抵消基体的影响,手续繁杂、费时。我们采用邻二氮菲简易双波长分光光度测定铁,得到了满意结果。     

Probing the improved stability for high nickel cathode via dual-element modification in lithium-ion

One of the major hurdles of nickel-rich cathode materials for lithium-ion batteries is the low cycling stability, especially at high temperature and high voltage, originating from severe structural degradation, which makes this class of cathode less practical. Herein, we compared the effect of single and dual ions on electrochemical performance of high nickel (LiNi_0.88Mn_0.03Co_0.09O₂, NMC) cathode material in different temperatures and voltage ranges. The addition of a few amounts of tantalum (0.2 wt%) and boron (0.05 wt%) lead to improved electrochemical performance. The co-modified LiNi_0.88Mn_0.03Co_0.09O₂ displays an initial discharge capacity of 234.9 mAh/g at 0.1 C and retained 208 mAh/g at 1 C after 100 cycles at 45 ℃, which corresponds to a capacity retention of 88.5%, compared to the initial discharge capacity of 234.1 mAh/g and retained capacity of 200.5 mAh/g (85.6%). The enhanced capacity retention is attributed to the synergetic effect of foreign elements by acting as a surface structural stabilizer without sacrificing specific capacity.