Towards a black-box for biological EXAFS data analysis – III. A universal post-processor for fluorescence XAS: KEMP2

نویسندگان

  • Gerd Wellenreuther
  • Wolfram Meyer-Klaucke
چکیده

Because of the typically rather low trace element concentrations in biological samples XAS is collected in fluorescence mode with the help of a multi-element detector. In addition, several scans have to be accumulated and thus post-processing operations have to be carried out after the measurement, e.g. selecting good detector channels, checking for radiation damage, fitting of background and normalization. KEMP2 is a freely available post-processor implementing all these steps, while maintaining universal applicability by separating the instrumentand beamline-dependent steps like energy-calibration etc. from XAS-generic tasks. Thus, KEMP2 has the potential to serve as a highly automated data pipeline assisting both senior and novice users.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Towards a black-box for biological EXAFS data analysis. II. Automatic BioXAS Refinement and Analysis (ABRA).

In biological systems, X-ray absorption spectroscopy (XAS) can determine structural details of metal binding sites with high resolution. Here a method enabling an automated analysis of the corresponding EXAFS data is presented, utilizing in addition to least-squares refinement the prior knowledge about structural details and important fit parameters. A metal binding motif is characterized by th...

متن کامل

مطالعه تغییرات شمیایی و ساختمانی سولفیدهای نقره و مس توسط SRS (مطالعه‌ای از کاربردهای سینکروترون بر مبنای XAS در کانی‌شناسی- بلورشناسی و ژئوشیمی)

The ABS2 sulphides (A=Cu, or Ag), B=As, Sb, Bi) are a naturally occurring group of minerals, typically found in polymetallic vein deposits. Behind chemically simple, the minerals have a complex structure and undergo several temperature/composition phase transitions. In this study, synchrotron radiation is used to collect Ag, As, Bi, Cu, Cd, Hg and Sb K-edge EXAFS data from a series of synthetic...

متن کامل

Adsorption Mechanisms of Cadmium onto Pillared Clays and Chalcogenides

Interactions between Cd, pillared clays and chalcogenedies have been studied using nanomineralogical experiments. XRD, DSC and chemical analysis. The synchrotron-based X-ray absorption spectroscopy (XAS) was applied to characterize the reaction phases. The mean bond lengths between, Cd-S, Fe-S, Sb-S, Cd-Cd (in chalcogenedies), Al-Cd, Cd-Ti, and Fe-Cd, (in pillared clays) were determined by XAS ...

متن کامل

X-ray Absorption Spectroscopy

1.59.1 PHYSICS OF X-RAY ABSORPTION 1 1.59.1.1 X-ray Absorption Edges 2 1.59.1.2 X-ray Fluorescence 3 1.59.1.3 Measurement of X-ray Absorption Spectra 3 1.59.2 EXTENDED X-RAY ABSORPTION FINE STRUCTURE 6 1.59.2.1 Theoretical Description of EXAFS Spectra 6 1.59.2.1.1 Single scattering 6 1.59.2.1.2 Multiple scattering 8 1.59.2.1.3 Other corrections to the EXAFS equation 9 1.59.2.2 Programs for Calc...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009