Methanogenic pathways and δ 13 C values from swine manure with a cavity ring‐down spectrometer: Ammonia cross‐interference and carbon isotope labeling

2020 ◽  
Vol 34 (7) ◽  
Author(s):  
Frederik R. Dalby ◽  
Andrea Fuchs ◽  
Anders Feilberg
Keyword(s):  
Carbon Isotope ◽  
Isotope Labeling ◽  
Swine Manure ◽  
Cavity Ring Down

scholarly journals Cover Feature: A Nickel(II)‐Mediated Thiocarbonylation Strategy for Carbon Isotope Labeling of Aliphatic Carboxamides (Chem. Eur. J. 24/2021)

2021 ◽  
Vol 27 (24) ◽  
pp. 6998-6998
Author(s):  
Simon S. Pedersen ◽  
Aske S. Donslund ◽  
Jesper H. Mikkelsen ◽  
Oskar S. Bakholm ◽  
Florian Papp ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Labeling ◽  
J 24

A Nickel(II)‐Mediated Thiocarbonylation Strategy for Carbon Isotope Labeling of Aliphatic Carboxamides

2021 ◽  
Author(s):  
Simon S. Pedersen ◽  
Aske S. Donslund ◽  
Jesper H. Mikkelsen ◽  
Oskar S. Bakholm ◽  
Florian Papp ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Labeling

Charge distribution in turbostratic few-layer graphene studied by carbon isotope labeling

Carbon ◽  
2021 ◽  
Author(s):  
Pingping Zhuang ◽  
Jing Liu ◽  
Junjie Huang ◽  
Chao Dou ◽  
Weiwei Cai ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Charge Distribution ◽  
Isotope Labeling ◽  
Layer Graphene ◽  
Few Layer Graphene

Rapid-Swept CW Cavity Ring-down Laser Spectroscopy for Carbon Isotope Analysis

2006 ◽  
Vol 43 (4) ◽  
pp. 311-315 ◽  
Author(s):  
Hideki TOMITA ◽  
Kenichi WATANABE ◽  
Yu TAKIGUCHI ◽  
Jun KAWARABAYASHI ◽  
Tetsuo IGUCHI
Keyword(s):  
Carbon Isotope ◽  
Laser Spectroscopy ◽  
Isotope Analysis ◽  
Carbon Isotope Analysis ◽  
Cavity Ring Down

scholarly journals Carbon isotope systematics of Turrialba volcano, Costa Rica, using a portable cavity ring-down spectrometer

2017 ◽  
Vol 18 (7) ◽  
pp. 2769-2784 ◽  
Author(s):  
K. S. Malowany ◽  
J. Stix ◽  
J. M. de Moor ◽  
K. Chu ◽  
G. Lacrampe-Couloume ◽  
...  
Keyword(s):  
Costa Rica ◽  
Carbon Isotope ◽  
Turrialba Volcano ◽  
Isotope Systematics ◽  
Cavity Ring Down

scholarly journals Effects of combined tannic acid/fluoride on sulfur transformations and methanogenic pathways in swine manure

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257759
Author(s):  
Frederik Rask Dalby ◽  
Marcell Nikolausz ◽  
Michael Jørgen Hansen ◽  
Anders Feilberg
Keyword(s):  
Amino Acid ◽  
Sulfate Reduction ◽  
Tannic Acid ◽  
Isotope Labeling ◽  
Stable Carbon Isotope ◽  
Swine Manure ◽  
Community Change ◽  
Wastewater Sludge ◽  
Reduced Sulfur Compounds ◽  
Hydrogenotrophic Methanogenesis

Livestock manure emits reduced sulfur compounds and methane, which affect nature and the climate. These gases are efficiently mitigated by addition of a tannic acid-sodium fluoride combination inhibitor (TA-NaF), and to some extent by acidification. In this paper, TA-NaF treatment was performed on swine manure to study the treatment influence on methanogenic pathways and sulfur transformation pathways in various laboratory experiments. Stable carbon isotope labeling revealed that both untreated and TA-NaF treated swine manures were dominated by hydrogenotrophic methanogenesis. However, in supplementary experiments in wastewater sludge, TA-NaF clearly inhibited acetoclastic methanogenesis, whereas acidification inhibited hydrogenotrophic methanogenesis. In swine manure, TA-NaF inhibited s-amino acid catabolism to a larger extent than sulfate reduction. Conversely, acidification reduced sulfate reduction activity more than s-amino acid degradation. TA-NaF treatment had no significant effect on methanogenic community structure, which was surprising considering clear effects on isotope ratios of methane and carbon dioxide. Halophile sulfate reducers adapted well to TA-NaF treatment, but the community change also depended on temperature. The combined experimental work resulted in a proposed inhibition scheme for sulfur transformations and methanogenic pathways as affected by TA-NaF and acidification in swine manure and in other inocula.

scholarly journals Carbon isotope labeling of carbamates by late-stage [11C], [13C] and [14C]carbon dioxide incorporation

2020 ◽  
Vol 56 (78) ◽  
pp. 11677-11680
Author(s):  
Antonio Del Vecchio ◽  
Alex Talbot ◽  
Fabien Caillé ◽  
Arnaud Chevalier ◽  
Antoine Sallustrau ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Isotope ◽  
Carbon Isotopes ◽  
Late Stage ◽  
Building Block ◽  
Isotope Labeling

A procedure which allows labelling cyclic carbamates with all carbon isotopes has been developed. This protocol valorizes carbon dioxide, the universal building block for radiolabeling. A series of pharmaceuticals were obtained and a disconnection/reconnection strategy was implemented.

Investigation on the Stoichiometry of Carbon Dioxide in Isotope-Exchange Reactions with Phenylacetic Acids

Synlett ◽  
2021 ◽  
Author(s):  
Davide Audisio ◽  
Alex Talbot ◽  
Antoine Sallustrau ◽  
Amélie Goudet ◽  
Frédéric Taran
Keyword(s):  
Carbon Dioxide ◽  
Carbon Isotope ◽  
Isotope Exchange ◽  
Isotope Labeling ◽  
Exchange Reactions ◽  
Major Interest ◽  
Carbon Dioxide Co2 ◽  
Dilution Effects ◽  
Product Outcome ◽  
Insight Into

AbstractThe functionalization of carbon dioxide (CO2) as a C1 building block has attracted enormous attention. Carboxylation reactions, in particular, are of major interest for applications in isotope labeling. Due to the inexpensive nature of CO2, information about its stoichiometric use is generally unavailable in the literature. Because of the rarity and limited availability of CO2 isotopomers, this parameter is of concern for applications in carbon-isotope labeling. We investigated the effects of the stoichiometry of labeled CO2 on carbon isotope exchange of phenyl­acetic acids. Both thermal and photocatalytic procedures were studied, providing insight into product outcome and isotope incorporation. Preliminary results on isotope-dilution effects of carbonate bases in photocatalytic carboxylation reactions have also been obtained.

A free-air system for long-term stable carbon isotope labeling of adult forest trees

Trees ◽  
2010 ◽  
Vol 25 (2) ◽  
pp. 187-198 ◽  
Author(s):  
Thorsten E. E. Grams ◽  
Herbert Werner ◽  
Daniel Kuptz ◽  
Wilma Ritter ◽  
Frank Fleischmann ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Labeling ◽  
Stable Carbon Isotope ◽  
Forest Trees ◽  
Stable Carbon ◽  
Free Air ◽  
Air System
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