Otálora F, Capelle B, Ducruix A, García-Ruiz J M
Laboratorio de Estudios Cristalográficos (IACT), CSIC-Universidad de Granada, LEC/IACT, Campus Fuentenueva s/n (Fac. Ciencias), 18002 Granada,
Acta Crystallogr D Biol Crystallogr. 1999 Mar;55(Pt 3):644-9. doi: 10.1107/s0907444998014462.
Mosaic spread values for crystals grown in microgravity were measured using synchrotron radiation. Full width at half maximum (FWHM) values for diffraction line profiles in the range 10-20" (arc seconds, 1" = 1 degrees /3600) were observed. These values are similar to those measured for crystals grown on earth using the gel-acupuncture method. The crystals analysed are composed of from two to five domains producing peaks having widths from 5 to 15". The distribution of these domains is neither homogeneous (with domains of lower quality concentrated in the centre of the crystal) nor isotropic (producing peaks whose width changes depending on the observation direction). Methodological aspects are also discussed, with special consideration of the effects of mosaic spread on the data-collection procedures for high-resolution (low-intensity) reflections.
利用同步辐射测量了在微重力条件下生长的晶体的镶嵌扩展值。观察到衍射线轮廓在10 - 20"（弧秒，1" = 1度/3600）范围内的半高宽（FWHM）值。这些值与使用凝胶针刺法在地球上生长的晶体所测量的值相似。分析的晶体由两到五个畴组成，产生宽度为5到15"的峰。这些畴的分布既不均匀（质量较低的畴集中在晶体中心）也不是各向同性的（产生的峰宽度根据观察方向而变化）。还讨论了方法学方面的问题，特别考虑了镶嵌扩展对高分辨率（低强度）反射数据收集程序的影响。
