Phase Structures of Microemulsions Determined by the Steady-State Fluorescence Method

Experimental The pyrene was purchased from Sigma Co., and the other chemicals were of A. R. grade. Water was deionized and distilled twice before use. The microemulsions of required compositions were prepared in the following way. The stock microemulsions were made without water at first, corresponding to the A point (10wt% octane, 63wt% n-butanol, 27wt% CTAB) in the phase diagram of Figure 1 and then a series of microemulsions were made along AW dilution line with adding water. Calcu…     

因子分析-光度法同时测定α-萘酚和α-萘胺

测定了α-萘酚和α-萘胺混合体系的紫外光谱,用目标因子分析法成功地确定了混合体系的物种数、物种种类以及各物种的含量。平均回收率:α-萘酚为96.19%,α-萘胺为100.99%。并将结果同偏最小二乘法和卡尔曼滤波法做了比较。     

X射线荧光基本参数法测定焊锡中的锡和铅

本文在无标样的情况下,用X射线荧光基本参数法测定了焊锡中的锡和铅的含量。     

Cn-连续的B-型样条曲线及其局部性、插值与逼近

§ 1　IntroductionB-spline curve plays an important role in CAGD.Cn-continuous B-spline curve of de-gree n+ 1 has local support of length n+ 2 [1 ] .In order to modify the shape of a curve insmaller range,the length of its supportshould be as shortas possible.The interpolation ofa set of given data points with the B-spline curve generally needs to solve a system of lin-ear equations or to insert some additional control points[2— 5] .Besides,the global approxi-mation of the control polygon …     

小型托卡马克诊断用中性锂束源

介绍一台小型6keV低能锂束源。它是从锂霞石热发射体上引出离子 ,经静电透镜聚焦,在中和室与钠原子进行电荷交换,通过离子偏转最后获得中性束。根据实验需要,引出束流为脉宽10～100ms可调脉冲。仔细调试了束源与各相关参数间的关系,得到中性等效束流典型值是20μA/cm~2,束分布的半高全宽为8～9mm。我们将用此源测量HT-6M托卡马克的等离子体参数。     

The structure of the spherical tensor forces in the USD and GXPF1A shell model Hamiltonians

The realistic shell model Hamiltonians, USD and GXPF1A, have been transformed from the particle-particle (normal) representation to the particle-hole representation (multipole-multipole) by using the known formulation in Ref. [1]. The obtained multipole-multipole terms were compared with the known spherical tensor forces, including the coupled ones. It is the first time the contributions of the coupled tensor forces to the shell model Hamiltonian have been investigated. It has been shown that some coupled-tensor forces, such as r²Y₂σ]¹, also give important contributions to the shell model Hamiltonian.     

Low emittance lattice optimization using a multi-objective evolutionary algorithm

A low emittance lattice design and optimization procedure are systematically studied with a non-dominated sorting-based multi-objective evolutionary algorithm which not only globally searches the low emittance lattice, but also optimizes some beam quantities such as betatron tunes, momentum compaction factor and dispersion function simultaneously. In this paper the detailed algorithm and lattice design procedure are presented. The Hefei light source upgrade project storage ring lattice, with fixed magnet layout, is designed to illustrate this optimization procedure.     

Synthesis and anti-tumor activity of all-trans retinoic acid derivatives

A series of retinoate and retinamide derivatives were designed,synthesized,and their anti-tumor activities were investigated in NB4 by MTT and flow cytometry assays(FCM).All compounds showed cytotoxicity,especially compounds 1a and 1d exhibited a higher cytotoxicity than other derivatives and all-trans retinoic acid(ATRA).Furthermore,compound 1d could induce NB4 cell lines differentiation efficiently.     

Synthesis and antiviral activity of 4H-[1,2,5]oxadiazolo-[3,4-d]pyrimidine-5,7-dione 1-oxide nucleosides

A series of 4H-[1,2,5]oxadiazolo[3,4-d]pyrimidine-5,7-dione 1-oxide nucleosides was designed,synthesized and evaluated against vesicular stomatitis virus(VSV)in Wish cell.The antiviral activities of all compounds were stronger than those of acyclovir,while their toxicities were similar to those of acyclovir.     

KD-9 SYNCON同步监控仪的研制

本文介绍了自行研制的KD-9 SYNCON同步监控仪的原理、设计思想和一些技术关键。内容包括时基电路、预置延时电路、输入接口、总清及加电复位等。本仪器主要采用速度功耗适中的TTL元件,是用于μs级精度的高速摄影系统控制的一个主要设备。