晶胞常数法测定Fe-Y分子筛骨架含铁量

提出以X射线衍射法测量晶胞常数α_0与化学分析测定硅铝比相结合,定量测定Fe-Y分子筛骨架中铁含量Fe(s)。得到了经验公式:     

精矿品位在线自动检测系统的研制及应用

精矿品位在线自动检测系统是利用放射性同位素Ｘ射线荧光分析技术在选矿厂对皮带上精矿的元素含量进行连续自动检测。系统由放射性同位素源、闪烁探测器、放大器、脉冲幅度分析器、稳谱电路、信号传输电路、接口电路、大显示屏和微机等组成。使用该系统在攀枝花选矿厂对钒钛磁铁矿精矿品位进行检测，其结果与化学分析结果比较，绝对误差≤０．５％，合格率达９０．８１％。     

一种理想的固体无机化合物制备方法--前驱物固相反应法及其应用举例

介绍了一种高效率、低能耗、易操作的固体无机化合物制备方法——前驱物固相反应法及其广阔的应用前景,并通过自己设计的两个实验(ZnFe2O4和 Fe2O3的制备及表征)来证明此方法的可行性。     

Luffolide,a novel anti-inflammatory terpene from the spongeLuffariella sp.

Summary Luffolide (4) is a minor metabolite of the spongeLuffariella sp. from Palau. The structure of luffolide was determined by single crystal X-ray analysis. Luffolide is relatively unstable and undergoes a complex cyclization reaction to give the hexacyclic products5 and6. Luffolide (4) has some of the anti-inflammatory properties of manoalide (1): this may help to define the chemical reaction between manoalide (1) and phospholipase A₂.All crystallographic calculations were done on a PRIME 9950 computer operated by the Cornell Chemistry Computing Facility. Principal programs employed were: FOBS, a data reduction program by G.D. Van Duyne, Cornell University, 1987; MULTAN 80, and RANTAN 80, systems of computer programs for the automatic solution of crystal structures from X-ray diffraction data (locally modified to perform all Fourier calculations including Patterson syntheses) written by P. Main, S. E. Hull, L. Lessinger, G. Germain, J. P. Declercq and M. M. Woolfson, University of York, England, 1980 BDLS, an, anisotropic block diagonal least squares refinement written by K. Hirotsu, E. Arnold, and G. D. Van Duyne, Cornell University, 1987; PLUTO 78, a locally modified crystallographic illustration program by W. D. S. Motherwell, Cambridge Crystallographic Data Centre, 1978; and BOND, a program to calculate molecular parameters and prepare tables written by K. Hirotsu and G. Van Duyne, Cornell University, 1985.Acknowledgment. We thank the Government of the Republic of Palau for a scientific research permit. We thank Dr Klaus Rützler, Smithsonian Institution, Washington, D.C. for identifying the sponge and Mary Kay Harper for performing additional bioassays. This research was supported by grants from the Sea Grant College Programs of California [Projects R/MP-30 to DJF) and R/MP-31 (to RSJ)] and New York (to JC) and the National Institutes of Health (CA 24487 to JC).     

光子,质子X荧光谱的微机数据分析系统

本文介绍建立在ＩＢＭ微机上的Ｘ荧光谱数据分析系统，该系统既适用于光子激发、也适用于质子激发产生的Ｘ荧光谱的解谱分析．     

在扫描电镜中用x射线荧光法(SEM-EDXRF)测硅衬底上铝膜厚度

在以前的工作中,我们实现了扫描电镜中的x射线荧光分析(SEM-EDXRF),得到了较理想的原级x射线束。现在,我们又利用SEM-EDXRF方法测量了硅片上的铝膜厚度,其原理是测量由衬底发出的x射线荧光强度。对硅片上有不同厚度铝膜样品测量结果表明,衬底的x射线荧光强度的对数与膜厚成线性关系,并与理论符合很好。本实验预示了在扫描电镜中利用EDXRF方法测微区膜厚的可能性。     

球团矿焙烧后晶格常数的变化规律及对抗压强度的影响

对球团矿配制成分及焙烧温度按正交设计，测定其晶格常数的变化规律，得到了宏观抗压强度与晶格常数变化的依赖关系。     

高电荷态离子129Xeq+激发Au表面产生的X射线谱

目的研究高电荷态离子129Xeq (q=28,29,30)入射金属Au表面产生的特征X射线谱。方法应用高电荷态离子束流激发。结果在束流强度小于139 nA条件下,单离子的X射线产额可达10-8量级,特征X射线的产额随入射离子的动能和势能(电荷态)的增加而增加。结论与传统的X射线产生方法不同,高电荷态离子可以激发重原子的内壳层特征X射线谱,其产额高,品质好。     

人体胆结石的X射线衍射分析

本文用 X 射线衍射法对人体胆结石的成分进行了分析研究,并结合电感耦合等离子体(ICP)光谱分析数据及红外光谱进行了分类鉴定,为确定胆结石的成分及类型提供了快速、简便的方法.