用锇胺分子氢配合物作为探针研究药物与核苷酸的配位 动力学

研究了脱氧鸟苷酸(dGMP)及仅有一个配位位点的类似物—咪唑和磷酸氢二钠、磷酸二氢钠与探针的作用,结果表明：dGMP与探针的结合并非咪唑氮和磷酸氧与探针配位结果的简单加和。采用核磁和紫外-停留手段研究了药剂Me~2SnCl~2,Bu~2SnCl~2在不同浓度下与探针竞争dGMP配位位点的溶液化学及其反应动力学,得到了探针和药物与dGMP的结合位点、结合常数以及其动力学结果,对一些反应的机理作出了诠释。     

火焰原子吸收光谱法测定液氨中的铁

应用火焰原子吸收光谱法对液氨中的铁含量进行测定。分析了测定条件。方法简便、快速。测定铁的线性范围为0-8．00mg／L,相关系数为0．9999。应用于样品测定,测定结果的相对标准偏差小于2％,加标回收率为97．4％-106．1％。     

计算层析成像光谱仪的仿真研究

介绍一种无需时间或空间扫描的新型成像光谱仪计算层析成像光谱仪 (CTIS) ,并对其基本原理进行了详细叙述和方程式表达。系统的投影矩阵是由理论推导得出 ,采用广义矩阵的截断奇异值分解法作为计算机层析成像重建算法。为了便于计算机仿真 ,建立了一种简单的数理模型。仿真实验表明该理论、数理模型和算法准确合理 ,且算法的重建效率高、系统误差小     

消热差光学系统设计

引入光学材料的规化热差系数T和规化色差系数C,和到对无热差光系统设计的材料选择具有指导作用的T-C图.提出基于热差互补原理的无热差光学系统设计方法,建立了一组既消热差又消色差的方程组.给出了应用这种设计方法设计的密接三片和三分离两种结构型式的无热差系统在不同温度时的像面位移、垂轴像差和各色传递函数曲线.     

Residue analysis and kinetics modeling of thiophanate-methyl,carbendazim, tebuconazole and pyraclostrobin in apple tree bark using QuEChERS/HPLC–VWD

Winter is the key period for the control of apple diseases, and fungicides are needed to protect the trunk or main branches. Fungicide residue in apple tree bark is an important basis for the action of the pesticide, but there are no reports on analytical methods or dissipation patterns. In this work, thiophanate-methyl, carbendazim, tebuconazole and pyraclostrobin were selected as typical fungicides and a new QuEChERS–HPLC–VWD(QuEChERS extraction followed by high-performance liquid chromatography detection with a variable wavelength detector) analytical method was developed to estimate their residue kinetics in apple tree bark during the winter months. In the pretreatment step, the sorbent for the clean-up of extracts was optimized as 60 mg/ml primary secondary amine and a gradient-elution model followed by a variable wavelength detection was developed for instrumental analysis. Then this method was validated and applied to the analysis of apple tree bark samples with the linearity range of 0.010–50.00 mg/L, quantification limit range of 0.028–0.080 mg/kg and recovery range of 86.1–101.4%. The dissipation kinetics of thiophanate-methyl and pyraclostrobin could be described by the first-order and two-phase kinetics models, respectively. For carbendazim and tebuconazole, two new models were developed to describe their residue kinetics.     

用于液晶可调谐滤光片型多光谱成像仪的中继成像系统设计

液晶可调谐滤光片(LCTF)是多光谱成像中一种高效的分光元件,但其物理尺寸超出了一般商业镜头的法兰距,很难直接与商业镜头及工业相机结合进行多光谱成像。设计了一种工作在单位放大率下的中继成像系统,用以适应它们的接口关系。其工作波段为400～720nm,工作F数为4.5,利用完全对称的结构,自动校正彗差、畸变和垂轴色差,设计结果满足多光谱成像的使用要求。该系统结构紧凑,生产成本低,适用于液晶可调谐滤光片型便携式多光谱成像仪的模块化设计。     

干涉光谱仪动镜倾斜误差容限分析

本文从调制度和相位误差角度,系统分析了双光束干涉光谱仪中,当光束孔径为圆形和矩形时,动镜运动过程中发生倾斜的影响,讨论了动镜倾斜容限以及减小动镜倾斜误差的方法.     

光谱估计方法FAT的强度修正及品质因子

对作者早先提出的光谱估算方法ＦＡＴ作进一步探讨，提出利用退卷积技术实现光谱线型优化从而修正估计谱相对强度的方法，同时还提出了反映线型优化度及估计谱可靠性的品质因子的概念。     

Study on the interactions between anti-tumor metal complexes and mononucleotides using trans-[en_2Os(η~2-H_2)(CF_3SO_3)](CF_3SO_3) as a ~1H NMR probe in a competitive mode

Trans-[en_2Os(η~2-H_2)]2 , the structure of which is shown in Scheme l, as described in an earlier paper[l] shows promise of being a useful and versatile probe for research on biomolecules. It has been shown to bind to a variety of biomolecules such as n…     

傅里叶变换光谱仪中的主要技术环节

本文总结了在研制傅里叶交换光谱仪(FTS)或成象傅里叶变换光谱仪(IFTS)时应当考虑的主要技术环节,包括仪器函数、光谱分辨率、扩展光源、动镜运动误差、噪音等效功率、信噪比等,并给出相应计算公式.