Navigation Links
X-ray laser sees photosynthesis in action
Date:2/14/2013

tudies were able to freeze crystals of the catalyst at various stages of the process and see how it looked. But scientists wanted to see the chemistry take place. This was not possible at other X-ray facilities, because the fragile crystals had to be frozen to protect them from radiation damage.

However, the LCLS X-ray laser comes in such brief pulses measured in quadrillionths of a second that they could probe the crystals at room temperature in a chemically active state, before any damage set in, and generate data on two of the four steps in oxygen generation.

"We decided to use two X-ray techniques at once at the LCLS: crystallography to look at the overall atomic structure of Photosystem II, and spectroscopy to document the position and flow of electrons in the catalyst," said Vittal Yachandra, a Berkeley Lab chemist and co-leader of the project. "The electrons are important because they are involved in making and breaking bonds and other processes at the heart of chemical reactions."

Another co-leader, SLAC physicist Uwe Bergmann, said, "This result is a critical step in the ultimate goal to watch the full cycle of the splitting of water into oxygen during photosynthesis." The use of both techniques also verified that the molecular structure of the samples is not damaged during measurement with the LCLS, he said. "It's the first time that we have resolved the structure of Photosystem II under conditions in which we know for sure that the machinery that does the water splitting is fully intact."

In future LCLS experiments, the researchers hope to study all the steps carried out by Photosystem II in higher resolution, revealing the full transformation of water molecules into oxygen molecules considered a key to unlocking the system's potential use in making alternative fuels.

"Getting a few of the critical snapshots of this transition would be the final goal," said Jan Kern, a chemist who holds a joint position at
'/>"/>

Contact: Andy Freeberg
afreeberg@slac.stanford.edu
650-926-4359
DOE/SLAC National Accelerator Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. High-energy X-rays shine light on mystery of Picassos paints
2. X-ray laser helps fight sleeping sickness
3. Advance in X-ray imaging shines light on nanomaterials
4. X-ray vision exposes aerosol structures
5. CU-Boulder physicists use ultrafast lasers to create first tabletop X-ray device
6. NTU research embraces laser and sparks cool affair
7. INRS develops a nanohybrid with remarkable properties using a new laser-plasma process
8. Recently FDA-Approved Full Neck Treatment for Sagging Skin Now Available at Maryland Laser Skin and Vein Institute
9. Researchers create laser the size of a virus particle
10. From lectures to explosives detection: Laser pointer identifies dangerous chemicals in real-time
11. Worlds smallest semiconductor laser created by University of Texas scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
X-ray laser sees photosynthesis in action
(Date:11/21/2014)... November 21, 2014 2014 Deep ... Industryā€¯ is a professional and in-depth research report ... ferrocyanide information, like its definition, classification, application, ... overview. This report covers the international market analysis, ... (such as the US, Europe, Asia, China, Japan ...
(Date:11/21/2014)... , Nov. 20, 2014 /CNW/ - Aequus Pharmaceuticals ... announce that it has closed a brokered private ... for approximately C$3.7 million.  Cormark Securities Inc. and ... the Brokered Offering for a syndicate of agents ... Financial Corp. (collectively the "Agents"). Concurrently with the ...
(Date:11/18/2014)... SAN BRUNO, Calif. , Nov. 18, 2014 ... is a platinum sponsor of the 10th Annual World Stem ... and regenerative medicine stakeholders. The 2014 World Stem Cell Summit ... San Antonio, Texas . ... the discovery and development of lifesaving cures and therapies, convening ...
(Date:11/18/2014)... pH measurement and control is vital in a ... food and beverage industries. But what exactly is pH, ... sensors work? METTLER TOLEDO has produced a guide to ... these questions and more. , METTLER TOLEDO provides a ... The actual sensor, the pH electrode, is therefore the ...
Breaking Biology Technology:Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 2Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 3Aequus Pharmaceuticals closes $4.2 million private placement financing 2Aequus Pharmaceuticals closes $4.2 million private placement financing 3Cord Blood Registry Sponsors 2014 World Stem Cell Summit 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 3pH Guide from METTLER TOLEDO Explains Measurement, Theory and Practice of pH Applications 2
... Group Teams Up with YWCA & Roche to Educate ... of Balancing Cancer and a Career -, NEW ... Month, Cancer and Careers, a non-profit program,founded by Cosmetic ... offers guidance for the hundreds of thousands of people,living ...
... Calif., March 10 Accuray,Incorporated (Nasdaq: ARAY ), ... that its management is scheduled to present at the ... Seasons Hotel in,Las Vegas on Wednesday, March 19, 2008 ... live webcast of the presentation will be available online ...
... SAN FRANCISCO, Calif., March 10 ,Anesiva, Inc. (Nasdaq: ... has submitted,a supplemental New Drug Application (sNDA) with ... the indication for Zingo to treat the pain,associated ... adults.,Zingo(TM) (lidocaine hydrochloride monohydrate) powder intradermal,injection system is ...
Cached Biology Technology:First-Ever 'Cancer and Careers' Seminar Debuts in Orange County 2First-Ever 'Cancer and Careers' Seminar Debuts in Orange County 3Accuray to Present at Citi Investment Research Small & Mid-Cap Conference 2Anesiva Announces Submission of Supplemental New Drug Application for Zingo(TM) to Reduce Pain Associated With Needle Insertion Procedures in Adults 2Anesiva Announces Submission of Supplemental New Drug Application for Zingo(TM) to Reduce Pain Associated With Needle Insertion Procedures in Adults 3Anesiva Announces Submission of Supplemental New Drug Application for Zingo(TM) to Reduce Pain Associated With Needle Insertion Procedures in Adults 4
(Date:11/12/2014)... Nov. 12, 2014 Crossmatch™, a leading provider ... U.are.U ® fingerprint readers have been deployed throughout ... Central Mexico . The bakery chain implemented ... payroll issues caused by employees clocking in for each ... fingerprint readers, Montparnasse relied on paper timecards and a ...
(Date:11/7/2014)... SPRINGS, Florida , November 6, 2014 ... secure authentication for better mobile security revolutionizing online transactions.  Companies ... ), Alibaba Holdings Ltd. (NYSE: BABA ), Google ... MSFT ), eBay Inc. (NASDAQ: EBAY ) ... NXTD and NXTDW), a biometric authentication company ...
(Date:11/5/2014)... in the UTSA College of Sciences, is one ... receive a two-year $300,00 National Science Foundation (NSF) ... funding supports President Obama,s BRAIN Initiative, a federal ... that will demystify complex brain processes. , ... broken into the interactions of multiple components, each ...
Breaking Biology News(10 mins):Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3
... team of Fox Chase Cancer Center scientists led by ... mutation that keeps a mouse strain from developing white ... report by Kappes and his colleagues appears in the ... discovered the mice with this naturally occurring defect in ...
... simian virus 40 produces the Large T antigen which inactivates ... pRb. In a study published in the Journal of Biological ... the discovery of an additional target for T antigen--a protein ... chromosomal region that is deleted in up to 30% of ...
... demonstrated that a gel applied in the vagina provides ... the herpes simplex Virus. The study, presented at the ... first to show that a gel can retain anti-viral ... was funded by the National Institutes of Health (NIH) ...
Cached Biology News:Fox Chase Cancer Center scientists identify immune-system mutation 2New binding target for oncogenic viral protein 2Topical treatment shown to inhibit HIV and herpes simplex virus infection 2
... and lightweight, the Moticam 2300 camera (MC2300) ... eyepiece, eyetube, or trinocular port. Included in ... Plug-and-Play Images 2.0ML software offers quick and ... to maximize resolution for examination or documentation ...
... Physical form: Solution in 50% glycerol containing 20 mM ... and 20 mM NaCl Preparation Unit Definition: One unit ... equivalent to a ΔA 260 of 1.0 in ... volume 2.625 ml). Assay: SDS-PAGE ≥ 90 % ...
... an aqueous solution that contains a purified ... a PBS buffer (phosphate buffered saline), pH ... not contain a preservative. StabilCoat Immunoassay ... dried protein components in immunoassays and can ...
... Stabilizer is a bovine protein-free alternative ... is an aqueous solution that contains ... buffer (3-(N-Morpholino) propanesulfonic acid), pH 6.0 ... of 0.02% methylisothiazolone and 0.02% bromonitrodioxane ...
Biology Products: