01 May 2014

May 2014 E-News

  1. General user proposal results: July - December, 2014
  2. Applications of Synchrotron Imaging for Crop Improvement workshop: June 10 - 12
  3. Retention and chemical speciation of uranium in an oxidized wetland sediment from the Savannah River Site
  4. Site du CLS en français
  5. Spring issue of Green & White focuses on CLS
  6. New CLS users' interactive map
  7. 17th Annual Users' Meeting award winners
  8. Visit us at CSC2014 and CAP2014
  9. Accepting nominations for Users' Advisory Committee: deadline June 24
  10. New staff and now hiring

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1. General user proposal results: July - December, 2014

The CLS Peer Review Committee (PRC) held meetings in May to review general user proposals.

The proposals were reviewed and scored by the PRC and external reviewers, and ranked on a scale of one to five (with one being the highest). Beam time was allocated based on each proposal's ranking in relation to all other proposals for a given beamline. Of the 280 proposals submitted, 165 were new, with 115 requests from existing proposals. In total, 153 received beam time with an additional 16 new requests for macromolecular crystallography beam time (ranked separately).

Recipients have been notified, but if you did not receive notification, please contact the Users' Office by email. Beamline staff will be in contact regarding scheduling.

To view details of the results and to learn more about the peer review process, visit our website.

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2. Applications of Synchrotron Imaging for Crop Improvement workshop: June 10-12

This workshop will explore the application of synchrotron light for imaging plants, and the way plants can be structurally and functionally imaged, in-vivo to in-situ, as well as applying this information to aid in the development and selection of higher yielding crop varieties. It will also focus on imaging all components of the plant, from root to stem. It is anticipated that imaging will be a key tool in achieving the substantial increases in crop productivity to feed the world’s growing population.

Join researchers and industry partners for presentations, exhibitor booths, a poster session, networking events and a tour of the CLS. You will have opportunities to meet some of the world’s leading innovators in this industry, in both research and commercialization.

To register or for more information, visit the website, call (306) 668-2650, or email

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3. Retention and chemical speciation of uranium in an oxidized wetland sediment from the Savannah River Site

Uranium speciation and retention mechanisms onto Savannah River Site (SRS) wetland sediments was studied using batch (ad)sorption experiments, sequential extraction, U L3-edge X-ray absorption near-edge structure (XANES) spectroscopy, fluorescence mapping and μ-XANES. Under oxidized conditions, U was highly retained by the SRS wetland sediments. In contrast to other similar but much lower natural organic matter (NOM) sediments, significant sorption of U onto the SRS sediments was observed at pH < 4 and pH > 8. Sequential extraction indicated that the U species were primarily associated with the acid soluble fraction (weak acetic acid extractable) and organic fraction (Na-pyrophosphate extractable). Uranium L3-edge XANES spectra of the U-bound sediments were nearly identical to that of uranyl acetate. Based on fluorescence mapping, U and Fe distributions in the sediment were poorly correlated, U was distributed throughout the sample and did not appear as isolated U mineral phases. The primary oxidation state of U in these oxidized sediments was U(VI), and there was little evidence that the high sorptive capacity of the sediments could be ascribed to abiotic or biotic reduction to the less soluble U(IV) species or to secondary mineral formation. Collectively, this study suggests that U may be strongly bound to wetland sediments, not only under reducing conditions by reductive precipitation, but also under oxidizing conditions through NOM-uranium bonding.

Cite: Li, Dien, et al. "Retention and chemical speciation of uranium in an oxidized wetland sediment from the Savannah River Site." Journal of environmental radioactivity (2013). DOI http://dx.doi.org/10.1016/j.jenvrad.2013.10.017

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4. Site du CLS en français

Afin d’être plus accueillant auprès des utilisateurs et des visiteurs francophones, le CCRS a traduit une partie du site web en Français avec l’aide de nos collègues à SOLEIL et le Comité consultatif des utilisateurs (UAC). Maintenant, les utilisateurs futurs et actuels, ainsi que le public, peuvent lire en Français au sujet du CCRS, comment réserver du temps de faisceau, et beaucoup plus.

Site du CLS en français

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5. Spring issue of the Green & White focuses on CLS

The Spring 2014 issue of the Green & White University of Saskatchewan alumni magazine takes an in-depth look at the CLS.

In the issue:

Excelling at accelerator science: a brief history
Can the CLS address a looming medical isotope shortage
CLS research that could change your life

And much more... visit the online edition here

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6. New CLS users interactive map

Ever wonder where CLS users come from? Or where other synchrotrons are located around the world?

Visit the new interactive map to find everything you want to know.

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7. 17th Annual Users' Meeting award winners

Congratulations to all of the award winners from the CLS AUM (May 1-2):

User Advisory Committee User Support Award (sponsored by Johnsen Ultravac): BMIT Staff Scientist George Belev (pictured)

G. Michael Bancroft PhD Thesis Award: Riccardo Comin, University of British Columbia

Life Sciences Poster award: "The Bees Knees", Bailey Wookowski-Esquire, Education, University of Saskatchewan; Michael Wenkoff, Education, University of Saskatchewan; Tate Johnson, Education, University of Saskatchewan; Anton Siaotong, Education, University of Saskatchewan; Tim Molnar, Education, University of Saskatchewan; Tracy Walker, EFD, CLS; David Muir, EFD, CLS; Joyce McBeth, EFD, CLS; Julie Thompson, Industry Science, CLS; R.I.R. Blyth, EFD, CLS

Environmental and Earth Sciences Poster award: "Effect of Magnesium substitution ratios in Calcium phosphate minerals: A phosphorus K-edge XANES, XRF and FTIR Study", David Hilger, Soil Science, University of Saskatchewan; Jordan Hamilton, Soil Science, University of Saskatchewan; Yongfeng Hu, Canadian Light Source; Derek Peak, Soil Science, University of Saskatchewan

Material Science and Instrumentation Poster Award: "X-Ray Diffraction and Vibrational Spectroscopy Study of Dense Nitrogen-Rich Energetic Materials", Dominique Laniel, Physics, University of Ottawa

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8. Visit us at CSC2014 and CAP2014

The CLS will be on display at the Canadian Society for Chemistry (CSC), Canadian Chemistry Conference and Exhibition, June 1-5 in Vancouver. Visit the CSC website for details.

We will also be at the Canadian Association of Physicists (CAP) Congress in Sudbury from June 17-19. Visit the CAP website for more information.

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9. Accepting nominations for Users' Advisory Committee: deadline June 24

The Users' Advisory Committee (UAC) is seeking nominations from the CLS user community for the election of two new regular members for a three-year term (September 2014 to August 2017), and one student member for a two-year term (September 2014 to August 2016).

The UAC is currently composed of 12 members, including one CLS-appointed full member from various locations, disciplines, scientific sectors, and techniques. The committee would like to achieve a balanced representation of the user community. This year we would especially like to encourage nominees from government or industrial sectors, as well as environmental and earth sciences communities, from across Canada.

To view current membership demographics, click here. Details on current UAC membership, terms of reference, elections, past meeting minutes and meetings are available on the website.

Nominations will be accepted until Tuesday, June 24, 2014. Please forward your nominations to Andrew Grosvenor, UAC Vice-Chair by email orclsuac@lightsource.ca

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10. New staff and now hiring

The CLS is pleased to welcome Toby Bond, Industrial Science Associate. Toby obtained his chemistry degree from the University of Saskatchewan before heading off to Dalhousie University to get his MSc. In October 2012 Toby returned to Saskatoon and was working as an Analytical Chemist for the Saskatchewan Isotope Laboratory before joining the CLS.

 

 

The CLS is pleased to welcome Saroj Kumar, THRUST Mid-IR Postdoctoral Fellow. Saroj joined the Mid-IR team from the Laboratory for Structure and Function of Biological Membranes where he was a Postdoctoral Fellow at the Universite Libre de Bruxelles in Brussels, Belgium. Saroj’s background and expertise in FTIR spectroscopy will assist in the development of imaging techniques using infrared focal plane array detectors and multiple beam optics. Saroj is also participating in the CIHR-THRUST program in partnership with Dr. Bogdan Popescu from the Department of Anatomy and Cell Biology at the University of Saskatchewan.

 

Welcome to the following new and returning summer students:

Michelle Hogan – Outreach Assistant
Victoria Schramm – Marketing & PR Assistant
Dryden Trivett – Mechanical Engineering Intern
Graham Kerr – BMIT Technical Assistant
Kyle Fransishyn – BMIT Technical Assistant
Iain Workman – SGM Software Developer
Eric Peach – IR Technical Assistant
Michael Richards – IR Technical Assistant
Marina Schmidt – Plant Imaging Research Assistant
Sarah Hoppe – Industrial Science Research Assistant
Jinru Lin – HXMA Technical Assistant
Zachary Arthur – HXMA Technical Assistant

The following job postings are currently available at CLS:

Job No. 759 - Staff Scientist – Mid-Infrared Beamline
Job No. 758 - Science Associate - Experimental Floor
Job No. 756 - Controls System Analyst (Multiple positions available)

Please visit the careers page on the CLS website for more information.

 


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