Navigation Links
Aqueous iron interacts as strong as solid iron
Date:7/6/2012

HZB scientists have apply a new method -- "inverse Partial Fluorescence Yield" (iPFY) on micro-jet -- which will enable them to probe the electronic structure of liquids free of sample damages. The experiments are performed in vacuum conditions at the LiXEdrom experimental chamber, where a fluid stream of micrometer diameter is moving freely through vacuum and is continuously irradiated with X-ray radiation.

These kinds of experiments are important as they reveal the interaction strength of the X-rays with the liquids and therefore allow for the structural analysis of substances dissolved in solution. "The method will achieve its absolute apprehension when will be applied to metal ions that are part of chemical catalysts used for clean energy production and biocatalysts (protein enzymes) used in biochemical transformation inside the living cells the team leader Prof. Aziz stated, which is the next milestone in our research progress. Previously, these types of experiments were so far only possible if the fluid was contained between two membranes, where radiation damages and membrane induced artifacts were a crucial issue. HZB's Young Investigator Group for Functional Materials in Solution headed by Prof. Dr. Emad Aziz has already applied the new method in iron ions dissolved in aqueous solution. Their findings have now been published in the Journal of Physical Chemistry Letters (DOI: 10.1021/jz300403n).

The researchers used X-ray radiation generated by HZB's own electron storage ring BESSY II to examine iron ions in aqueous solution. "We measured the absorption strength of the X-rays from our Fe 2+ and oxygen ions in the liquid micro-beam" explains Malte Gotz, who performed the experiments as part of his graduate research. "From here, we were able to draw conclusions regarding the electronic structure of the iron ions and further more to investigate the interaction of iron ions with the water solvent, " says Gotz.

The researchers used a new approach to measuring X-ray absorption of liquids. "Oxygen, which, along with iron ions, is also present in the solution, turns out to play a rather important role. If X-ray light is used to irradiate and thereby the oxygen that is present in the water will absorb this radiation, and will end up emitting light for a brief period of time. You might compare it to the glow-in-the-dark of a clock," Gotz explains. If you now reduce the amount of incoming radiation by having a different material in this case ionic iron absorbs it, it will directly reduce the amount of radiation emitted by the oxygen. "This in turn allows us to measure the absorption strength of ionic iron," says Gotz.

According to Emad Aziz, by definition, any measurement obtained at the free fluid stream is highly accurate. "A major advantage of our protocol is the fact that besides measuring only the signal from our fluid stream without having to account for any artifacts induced by the surrounding container we are also measuring a continuously fresh liquid sample," Aziz explains. In their studies the scientists found that iron ions suspended in the solution interact strongly with the solvent; a conclusion drawn by the strong 'Coster Kroenig decay process' observed in the liquid system, which were thus far observed only in solid iron. "We concluded that ions interact more strongly with water than was previously thought," says Aziz.

Our next step is to apply the new method to biological functional materials where the transition metals play key biological functions- such as oxygen-carrying iron in human blood. New and deep insights into these catalysts' structure and function are the challenge of our scientific research.


'/>"/>

Contact: Dr. Emad F. Aziz
emad.aziz@helmholtz-berlin.de
49-030-806-215-003
Helmholtz Association of German Research Centres
Source:Eurekalert  

Related biology news :

1. Engineered robot interacts with live fish
2. Strong scientific evidence that eating berries benefits the brain
3. A study confirms that long commercials evoke stronger emotions
4. New Biotech and Pharmaceutical Market Research from Global Information Inc Forecasts Strong Growth Coming Out of Recession
5. Poll shows strong voter support for school nutrition standards
6. Accelerating climate change exerts strong pressure on Europes mountain flora
7. Scientists uncover strong support for once-marginalized theory on Parkinsons disease
8. Light weights are just as good for building muscle, getting stronger, researchers find
9. CDS Monarch Deploys DigitalPersona Strong Authentication Solutions for Secure Access to Electronic Medical Records
10. New Tool Helps Drug Developers Optimize Their Research and Target Development for Better Results and a Stronger Competitive Edge
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Aqueous iron interacts as strong as solid iron
(Date:11/15/2016)... DUBLIN , Nov 15, 2016 Research ... - Global Forecast to 2021" report to their offering. ... ... reach USD 16.18 Billion by 2021 from USD 6.21 Billion in ... Growth of the bioinformatics market is driven by ...
(Date:6/22/2016)... 2016   Acuant , the leading ... has partnered with RightCrowd ® to ... Management, Self-Service Kiosks and Continuous Workforce Assurance. ... functional enhancements to existing physical access control ... with an automated ID verification and authentication ...
(Date:6/15/2016)... 15, 2016 Transparency Market ... Recognition Market by Application Market - Global Industry Analysis Size ... to the report, the  global gesture recognition market ... and is estimated to grow at a CAGR ... 2024.  Increasing application of gesture recognition ...
Breaking Biology News(10 mins):
(Date:12/7/2016)... 7, 2016 Regen BioPharma Inc. (OTCQB: ... of Molecular Sciences a team of scientists in ... have demonstrated that expression of NR2F6 in patients with early ... NR2F6 in patient,s cervical cancer tissue as well as in ... "This is an interesting study and the first that I ...
(Date:12/7/2016)... (PRWEB) , ... December 07, 2016 , ... Kara Dwyer Dodge grew up hearing stories ... a third-generation fisherman in Scituate, Mass., found a sea turtle entangled in the lines of ... the turtle became a minor sensation because no one could remember ever seeing one so ...
(Date:12/6/2016)... ... December 06, 2016 , ... Discovering new clues to natural treatments ... lasers what’s happening in our brains. And searching for keys to our immune systems ... being honored with the 2017 Edith and Peter O’Donnell Awards by ...
(Date:12/6/2016)... and SAN DIEGO , Dec. 6, ... appointment of Santosh Kesari , MD, PhD, FANA, ... leverage his experience in neurology and clinical trials to ... cell for treatment of stroke. The AmnioStem product is a ... has previously shown therapeutic activity in animal models of ...
Breaking Biology Technology: