Navigation Links
LiXEdrom: Innovative measuring chamber for X-ray study of liquid jets
Date:9/10/2010

X-rays are the medium of choice for many scientific studies. When you shine them on a sample, they literally shed light on the material's structure, providing loads of information about it. Unfortunately, this mostly applies to solids only, since the sample has to be in a vacuum for the entire time it is being irradiated with soft X-rays. For liquids, that means you have to remove all the water. In the case of biological samples such as proteins, however, this destroys their natural environment. The solution to this problems has always been to measure liquids through membranes. These membranes keep the evacuated side separate from the non-evacuated side. The trouble is, one can never really be sure whether or not membrane effects are distorting the measurement results.

At Helmholtz-Zentrum Berlin (HZB), Emad Aziz, head of a junior research group, has shown that liquids can be investigated by X-ray emission spectroscopy without using membranes after all. At the synchrotron source BESSY II, the group has built a special setup the LiXEdrom. It is unique in that the liquid is shot as a jet through the X-ray beam. The jet from the nozzle becomes so thin and, at 80 metres per second, so fast that the vacuum can be maintained without the need of a membrane.

"On our LiXEdrom, we create a vacuum in the liquid chamber of up to 10-6 millibar, and can now perform both absorption and emission measurements, giving us even more precise information about the structure of a material," says Emad Aziz. It also allows a clear "view" of elements that possess absorption and emission energies similar to the energies of the membrane materials, and would therefore overlap with the membrane in the spectrum when measured. This concerns above all carbon and nitrogen precisely those elements of interest in biological samples.

In their first measurements, published in Chemical Physics (DOI: 10.1016/JChemPhys.2010.08.023) and selected for the cover, the group demonstrated they can achieve energy resolutions on their LiXEdrom comparable to those of the latest high resolution XES spectrometers. For water, they have proven that results obtained from an earlier setup were not overlapped by disturbing membrane effects. They have also studied the electronic structure of nickel ions, unhampered by a risk of deposits on a membrane wall distorting the results. For many applications such as protein studies, this is a significant step towards obtaining reliable structural information.


'/>"/>

Contact: Kathrin Maria Lange
kathrin.lange@helmholtz-berlin.de
49-308-062-14621
Helmholtz Association of German Research Centres
Source:Eurekalert

Related biology news :

1. NSF funds innovative approach to biomimetic nanofiber bone regeneration
2. International AIDS Society announces inaugural recipients of innovative HIV research awards
3. Innovative research reawakens human memories through intelligent textiles
4. Innovative MSU research makes lake and stream conservation more effective
5. NYSCF awards fellowships to 8 innovative stem cell scientists
6. The Reaxys Ph.D. Prize awards innovative research in organic, organometallic and inorganic chemistry
7. Creating new healthy ingredients by innovative milling techniques and processes for cereal grains
8. Frost & Sullivan Recognises Sagem Securite for its Innovative Automated Border Control Systems
9. Innovative Document Security Technology Proves Powerful in Avoiding Counterfeit Products
10. Innovative R&D prioritization tool earns Baxter the 2009 INFORMS Decision Analysis Award
11. Concordia University to build innovative Environmental Chamber
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2017)... 2017 RAM Group , Singaporean ... breakthrough in biometric authentication based on a ... to perform biometric authentication. These new sensors are based ... by Ram Group and its partners. This sensor will ... chains and security. Ram Group is a next ...
(Date:4/17/2017)... , April 17, 2017 NXT-ID, Inc. (NASDAQ: ... announces the filing of its 2016 Annual Report on Form 10-K ... Commission. ... 10-K is available in the Investor Relations section of the Company,s ... the SEC,s website at http://www.sec.gov . 2016 Year ...
(Date:4/11/2017)... , Apr. 11, 2017 Research and Markets ... 2017-2021" report to their offering. ... The global eye tracking market to grow at a CAGR ... Global Eye Tracking Market 2017-2021, has been prepared based on an ... the market landscape and its growth prospects over the coming years. ...
Breaking Biology News(10 mins):
(Date:5/24/2017)... ... May 23, 2017 , ... Federal funding for basic and applied scientific ... life-saving medical and other vital technologies — deserves continued support, say leaders of ... scientific community today in responding to the President’s budget request for Fiscal Year 2018. ...
(Date:5/23/2017)... Ca (PRWEB) , ... May ... ... (PSCs) offer an unlimited source of human cardiovascular cells for research and ... differentiation methods makes it possible to generate large numbers of cardiomyocytes (hPSC-CMs). ...
(Date:5/23/2017)... ... 23, 2017 , ... Energetiq Technology, a world leader in ... to accommodate its rapid growth. , The renovations at the company’s headquarters in ... existing areas. The expansion includes, a state-of-the-art engineering facility, and a second clean ...
(Date:5/22/2017)... , ... May 22, 2017 , ... Stratevi, a boutique ... to the East Coast. It has opened an office in downtown Boston at 745 ... finding it increasingly more important to generate evidence on the value they provide, not ...
Breaking Biology Technology: