Results 41 to 50 of about 480,870 (312)

Comprehensive inter-laboratory calibration of reference materials for δ18O versus VSMOW using various on-line high-temperature conversion techniques [PDF]

, 2009
Internationally distributed organic and inorganic oxygen isotopic reference materials have been calibrated by six laboratories carrying out more than 5300 measurements using a variety of high-temperature conversion techniques (HTC) in an evaluation ...
Weise, Stephan M., Mroczkowski, S. J., Brand, Willi A., Qi, H., Stuart-Williams, Hilary,, Geilmann, Heike, Aerts-Bijma, A. T., Weise, S. E., Jansen, H., Geilmann, Heike,, Qi, Haiping, Coplen, T. B., Bohlke, J., Coplen, Tyler B.,, J. K. Böhlke, Qi, H. P., Aerts-Bijma, Anita T.; id_orcid, Meijer, Harro A. J., Weise, S., Soergel, Karin,, Groning, M., Böhlke, J.K., Gröning, Manfred,, Stephan M. Weise, Gröning, Manfred, Haiping Qi, Anita T. Aerts‐Bijma, Jansen, Henk G.,, Heike Geilmann, Meijer, H. A. J., Gehre, Matthias, Jansen, Henk G., Meijer, Harro A. J.; id_orcid, Roland A. Werner, Werner, Roland A.,, Coplen, Tyler B., Böhlke, J.K.,, Werner, R., Werner, Roland A., Geilmann, H., Jansen, H. G., Aerts-Bijma, Anita T., Stuart-Williams, H., Karin Soergel, Henk G. Jansen, Stanley J. Mroczkowski, Aerts-Bijma, Anita T.,, Gehre, Matthias,, Gehre, M., Bohlke, J. K., Mroczkowski, Stanley J.,, Meijer, Harro A.J.,, Meijer, H., Mroczkowski, S., Mroczkowski, Stanley J., Brand, W., Tyler B. Coplen, Soergel, Karin, Hilary Stuart‐Williams, Weise, Stephan M.,, Willi A. Brand, Aerts-Bijma, A., Matthias Gehre, Brand, Willi A.,, Manfred Gröning, Soergel, K., Coplen, T., Qi, Haiping,, Stuart-Williams, Hilary, Harro A. J. Meijer   +69 more
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Direct carbon isotope exchange of pharmaceuticals via reversible decyanation

, 2021
International audienceThe incorporation of carbon-14 allows tracking of organic molecules and provides vital knowledge on their fate. This information is critical in pharmaceutical development, crop science, and human food safety evaluation.
Cantat, Thibault, Elmore, Charles, Taran, Frédéric, Destro, Gianluca, Thuéry, Pierre, Roy, Sebastien, Feng, Minghao, Sallustrau, Antoine, Audisio, Davide, Blankenstein, Jorg, de Oliveira, Joao   +10 more
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Multiplexed Analysis of Cage and Cage Free Chicken Egg Fatty Acids Using Stable Isotope Labeling and Mass Spectrometry

Molecules, 2013
Binary stable isotope labeling couple with LC-ESI-MS has been used as a powerful non-targeted approach for the relative quantification of lipids, amino acids, and many other important metabolite classes.
Richard G. Torde, Andrew J. Therrien, Michael R. Shortreed, Lloyd M. Smith, Shane M. Lamos   +4 more
doaj   +1 more source

zmm28 transgenic maize increases both N uptake- and N utilization-efficiencies

Communications Biology, 2022
Isotope 15N labeling demonstrates that zmm28 transgenic maize have an improved N uptake during late-vegetative stages inducing N storage in lower leaves of the canopy and, thus, N uptake efficiency relative to wild-type maize.
Javier A. Fernandez, Jeffrey E. Habben, Jeffrey R. Schussler, Tim Masek, Ben Weers, James Bing, Ignacio A. Ciampitti   +6 more
doaj   +1 more source

Chemoenzymatic Assembly of Isotopically Labeled Folates [PDF]

Journal of the American Chemical Society, 2017
Pterin-containing natural products have diverse functions in life, but an efficient and easy scheme for their in vitro synthesis is not available. Here we report a chemoenzymatic 14-step, one-pot synthesis that can be used to generate 13C- and 15N-labeled dihydrofolates (H2F) from glucose, guanine, and p-aminobenzoyl-l-glutamic acid.
Antonio Angelastro, William M. Dawson, Louis Y. P. Luk, E. Joel Loveridge, Rudolf K. Allemann   +4 more
openaire   +6 more sources

Probing local changes to α-helical structures with 2D IR spectroscopy and isotope labeling [PDF]

, 2022
α-helical secondary structures impart specific mechanical and physiochemical properties to peptides and proteins, enabling them to perform a vast array of molecular tasks ranging from membrane insertion to molecular allostery.
Alisa, Shmidt, Kathryn, Segner, Kayla, Hess, Lauren, Buchanan, Kelsey, Webb   +4 more
core   +2 more sources

Mechanistic investigation of the formation of H2 from HCOOH with a dinuclear Ru model complex for formate hydrogen lyase

Science and Technology of Advanced Materials, 2017
We report the mechanistic investigation of catalytic H2 evolution from formic acid in water using a formate-bridged dinuclear Ru complex as a formate hydrogen lyase model.
Taisuke Tokunaga, Takeshi Yatabe, Takahiro Matsumoto, Tatsuya Ando, Ki-Seok Yoon, Seiji Ogo   +5 more
doaj   +1 more source

Isotope Labeling in Mammalian Cells [PDF]

, 2011
Isotope labeling of proteins represents an important and often required tool for the application of nuclear magnetic resonance (NMR) spectroscopy to investigate the structure and dynamics of proteins. Mammalian expression systems have conventionally been considered to be too weak and inefficient for protein expression.
Arpana, Dutta, Krishna, Saxena, Harald, Schwalbe, Judith, Klein-Seetharaman   +3 more
openaire   +2 more sources

Diel variations in the carbon isotope composition of respired CO(2) and associated carbon sources: a review of dynamics and mechanisms [PDF]

, 2011
Werner C, Gessler A. Diel variations in the carbon isotope composition of respired CO(2) and associated carbon sources: a review of dynamics and mechanisms. Biogeosciences.
Werner, Christiane ; https://orcid.org/, Geßler, Arthur, C. Werner, Gessler, A., A. Gessler, Werner, Christiane   +5 more
core   +2 more sources

Vertex Graceful Labeling-Some Path Related Graphs [PDF]

, 2013
Treating subjects as vertex graceful graphs, vertex graceful labeling, caterpillar, actinia graphs, Smarandachely vertex m ...
Balaganesan, P., Renuka, J., Selvaraju, P.   +2 more
core   +1 more source