当前位置: X-MOL 学术Eur. Biophys. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A calibration disk for the correction of radial errors from chromatic aberration and rotor stretch in the Optima AUC™ analytical ultracentrifuge.
European Biophysics Journal ( IF 2 ) Pub Date : 2020-05-09 , DOI: 10.1007/s00249-020-01434-z
Marielle Stoutjesdyk 1 , Amy Henrickson 2 , Geoff Minors 3 , Borries Demeler 2, 4
Affiliation  

Experiments performed in the analytical ultracentrifuge (AUC) measure sedimentation and diffusion coefficients, as well as the partial concentration of colloidal mixtures of molecules in the solution phase. From this information, their abundance, size, molar mass, density and anisotropy can be determined. The accuracy with which these parameters can be determined depends in part on the accuracy of the radial position recordings and the boundary conditions used in the modeling of the AUC data. The AUC instrument can spin samples at speeds up to 60,000 rpm, generating forces approaching 300,000 g. Forces of this magnitude will stretch the titanium rotors used in the instrument, shifting the boundary conditions required to solve the flow equations used in the modeling of the AUC data. A second source of error is caused by the chromatic aberration resulting from imperfections in the UV-visible absorption optics. Both errors are larger than the optical resolution of currently available instrumentation. Here, we report software routines that correct these errors, aided by a new calibration disk which can be used in place of the counterbalance to provide a calibration reference for each experiment to verify proper operation of the AUC instrument. We describe laboratory methods and software routines in UltraScan that incorporate calibrations and corrections for the rotor stretch and chromatic aberration in order to support Good Manufacturing Practices for AUC data analysis.

中文翻译:

一个用于校正Optima AUC™分析型超速离心机中色差和转子拉伸引起的径向误差的校准盘。

在分析超速离心机(AUC)中进行的实验可测量沉淀和扩散系数,以及溶液相中分子胶体混合物的部分浓度。根据这些信息,可以确定它们的丰度,大小,摩尔质量,密度和各向异性。可以确定这些参数的精度部分取决于径向位置记录的精度以及AUC数据建模中使用的边界条件。AUC仪器可以以高达60,000 rpm的速度旋转样品,产生的力接近300,000 g。这种大小的力将拉伸仪器中使用的钛转子,从而改变求解AUC数据建模中使用的流动方程所需的边界条件。错误的第二个来源是由紫外可见吸收光学器件的缺陷引起的色差引起的。这两个误差都大于当前可用仪器的光学分辨率。在这里,我们报告了可纠正这些错误的软件例程,并借助新的校准盘代替了配重,可以为每个实验提供校准参考,以验证AUC仪器的正常运行。我们在UltraScan中描述了实验室方法和软件例程,这些方法和例程结合了对转子拉伸和色差的校准和校正,以支持AUC数据分析的良好生产规范。我们报告了可纠正这些错误的软件例程,并借助新的校准盘代替了配重,可以使用这些校准盘为每个实验提供校准参考,以验证AUC仪器的正常运行。我们在UltraScan中描述了实验室方法和软件例程,这些方法和例程结合了对转子拉伸和色差的校准和校正,以支持AUC数据分析的良好生产规范。我们报告了可纠正这些错误的软件例程,并借助新的校准盘代替了配重,可以使用这些校准盘为每个实验提供校准参考,以验证AUC仪器的正常运行。我们在UltraScan中描述了实验室方法和软件例程,这些方法和例程结合了对转子拉伸和色差的校准和校正,以支持AUC数据分析的良好生产规范。
更新日期:2020-05-09
down
wechat
bug