droplet   McNeill Research Group
University of Minnesota • Department of Chemistry

McNeill Group News
 

SIK Dalton
July 27 , 2008

Sarah Kliegman's Perspective article featured on the cover of Dalton Transactions

Sarah Kliegman's Perspective article reviewing dechlorination reactions of chlorinated ethylenes by cobalamin and cobalamin models has come out in print with the article featured on the front cover.

Dechlorination of chloroethylenes by cob(I)alamin and cobalamin model complexes
Sarah Kliegman and Kristopher McNeill

Dalton Trans., 2008, 4191-4201.
http://dx.doi.org/10.1039/b801679h




MLG
July 27 , 2008

Matt departs for Norway

Matt Grandbois is spending the 2008-2009 academic year as a Fulbright Scholar at the Norwegian University of Science and Technology (NTNU) in Trondheim, Norway. At NTNU, Matt is enrolled in the Master of Science program in Globalization. Ser deg seinere, Matt! Lykke til!



tyrosine
June 25 , 2008

Anne and Betsy's research on the photochemistry of amino acids appears online

Anne Boreen and Betsy Edhlund's study of the photochemical fate of dissolved free amino acids in natural waters has been posted online in the ASAP section of Environmental Science & Technology. Their research shows that the amino acids, histidine, tryptophan, tyrosine, and methionine, are photooxidized in natural waters and that their relative rates of reaction differ in waters from different sources. This work was done in collaboration with Jim Cotner in the Department of Ecology, Evolution, and Behavior and was supported by the NSF (OCE-0527196).

Indirect Photodegradation of Dissolved Free Amino Acids: The Contribution of Singlet Oxygen and the Differential Reactivity of DOM from Various Sources
Anne L. Boreen, Betsy L. Edhlund, James B. Cotner and Kristopher McNeill

Environ. Sci. Tecnol. 2008, DOI: 10.1021/es800185d
http://dx.doi.org/10.1021/es800185d



IMG_0615.JPG
May 18, 2008

Photos of the most recent Lake Superior research cruise

The McNeill and Cotner research groups just got back from a three day research cruise on Lake Superior. Samples were taken from the Minnesota North Shore, the Western Lake Superior NOAA buoy (47.33 N 89.79 W), and the Apostle Islands. This work is part of a research project supported by the NSF (OCE-0527196).

Photos

Panorama in the Apostles Movie

McNeill Group Photo Archive




Betsy_Lucy
May 12 , 2008

Betsy Edhlund defends her Ph.D. thesis

Congratulations to Betsy Edhlund, who successfully defended her Ph.D. thesis, entitled "Natural Water Photochemistry: Singlet Oxygen Production and the Degradation of Dissolved Organic Nitrogen and Organic Pollutants." Betsy is pictured here with her (blurry) daughter Lucy.


SK_TOC
May 12, 2008

Sarah Kliegman's review article on cobalt-mediated dechlorination appears online

Sarah Kliegman has written a review of research progress in the area of cobalt-mediated dechlorination, relevant to understanding cobalamin-mediated processes in polluted groundwater systems. The article has appeared as a Dalton Transactions Advance Article.

Dechlorination of chloroethylenes by cob(I)alamin and cobalamin model complexes
Sarah Kliegman and Kristopher McNeill

Dalton Trans., 2008, DOI: 10.1039/b801679h
http://dx.doi.org/10.1039/b801679h



AAP
May 2, 2008

Alicia Peterson awarded Doctoral Dissertation Fellowship

Alicia Peterson was one of five Chemistry Department graduate students to be awarded the prestigious Doctoral Dissertation Fellowship by the Graduate School. The dissertation fellowship is awarded to a select group of graduate students based on their academic excellence and research accomplishments. The fellowship will provide Alicia with one year of support. Congratulations Alicia!



DTA
April 28, 2008

Kris named Morse-Alumni Distinguished Teaching Professor and inducted into the Minnesota Academy of Distinguished Teachers

Kris was among this year's16 inductees into the Minnesota Academy of Distinguished Teachers, due to his being awarded the Morse-Alumni Award for Contributions to Undergraduate Education.

Link to Award Announcement



asdf
April 18, 2008

McNeill Group participates in Earth Day Watershed Cleanup

Once again, the McNeill group participated in the Earth Day Watershed Cleanup sponsored by the Minneapolis Solid Waste Division and the Minneapolis Parks District. Danny, Britt, Elodie, Jeff, Sarah, and Kris hauled trash bags full of bottles, cans, and miscellaneous trash from the banks of the Mississippi near the historic Stone Arch Bridge.

The Minnesota Daily was there and interviewed Kris for their story on the event.

Pictures are here.



Matt
February 11, 2008

Matt Grandbois recognized with college-wide TA award

Matt Grandbois is one of the teaching assistants in the Institute of Technology voted Best TA by students in the college. He will receive his award at the IT Week Banquet later this month. Congratulations Matt!



KPM EIR
November 1, 2007

Kris recognized with "Excellence in Review" Award from Environmental Science and Technology

Kris was among the 24 reviewers for Environmental Science and Technology that were recognized for their reviews in the November 1 issue (Vol. 41, Issue 21) of the journal.

Link to the article:
Environ. Sci. Technol. 2007, 41(21), 7194.



tyl
27 July 2007

Environmental fate of tylosin

Graduate student Jeff Werner (Ph.D. '06) is the lead author on a study of tylosin, a veterinary antibiotic and growth promoter, that was a collaborative effort between the the McNeill group, the Arnold group (Minnesota Civil Engineering), and the Wammer group (University of St. Thomas, Dept. of Chemistry). The study shows that tylosin is quickly photo-equilibrated with a much less active isomer before being broken down further by sunlight.

Environmental Photochemistry of Tylosin: Efficient, Reversible Photoisomerization to a Less-Active Isomer, Followed by Photolysis
Jeffrey J. Werner, Mahati Chintapalli, Rachel A. Lundeen, Kristine H. Wammer, William A. Arnold, and Kristopher McNeill

Journal of Agriculture and Food Chemistry, 2007, 55, 7062-7068.
http://dx.doi.org/10.1021/jf070101h



 cim_chlor
25 July 2007

Chlorination of cimetidine, a wastewater contaminant, leads to unexpected products

Research by graduate student Jeff Buth shows that chlorination of cimetidine, a commonly used heartburn medication that is found in wastewater, leads to the formation of unexpected products. Some of these products are expected to have a greater ecological impact than the parent compound. This research is part of a long-standing collaboration between the McNeill group and Professor Bill Arnold in the Department of Civil Engineering on the fate of pharmaceutical pollutants in the aquatic environment.

Unexpected Products and Reaction Mechanisms of the Aqueous Chlorination of Cimetidine
Jeffrey M. Buth, William A. Arnold, and Kristopher McNeill

Environmental Science and Technology 2007, 41, 6228-6233.
http://dx.doi.org/10.1021/es070606o



MS2 humic acid
5 June 2007

Inactivation of virus MS2 by singlet oxygen is enhanced by association with natural organic matter (NOM)

Research by Matt Grandbois of the McNeill group, in collaboration with Tamar Kohn (EPFL) and Kara Nelson (UC Berkeley), has been published online in Environmental Science and Technology. The study extends previous work by Kohn and Nelson on the mechanism of the photoinactivation of MS2 and our work on the microheterogeneous distribution of singlet oxygen in natural waters. The results of this work are relevant to the inactivation of pathogens in waste stabilization ponds and other sunlit aquatic systems.

Association with Natural Organic Matter Enhances the Sunlight-Mediated Inactivation of MS2 Coliphage by Singlet Oxygen
Tamar Kohn, Matthew Grandbois, Kristopher McNeill, and Kara Nelson

Environmental Science and Technology 2007, 41, 4626-4632.
http://dx.doi.org/10.1021/es070295h


Related papers:
Sunlight-Mediated Inactivation of MS2 Coliphage via Exogenous Singlet Oxygen Produced by Sensitizers in Natural Waters
Tamar Kohn and Kara L. Nelson
Environmental Science and Technology, 2007, 41, 192 - 197.
http://dx.doi.org/10.1021/es061716i


Microheterogeneity of Singlet Oxygen Distributions in Irradiated Humic Acid Solutions
Douglas E. Latch and Kristopher McNeill
Science, 2006, 311, 1743-1747.
http://dx.doi.org/10.1126/science.1121636



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©2006 Kristopher McNeill