Search results for "cycle"

N,1-Bis(4-ethoxyphenyl)-2,6-dimethyl-4-oxo-1,4-dihydropyridine-3-carboxamide

2018

Condensation of ethyl acetoacetate and phenetidine gives the title compound, C24H26N2O4. The planar ethoxyphenyl group attached to the pyridine ring is twisted about 77.96 (11)° out of the plane of the N-ethoxycarboxamidopyridine unit. The carboxamide unit forms a dihedral angle of about 28.1 (2)° with the pyridine ring.

Single crystal X-ray structural dataset of 1,2,4-dithiazolium tetrafluoroborate

2022

Herein, we present the crystallographic dataset of 1,2,4-dithiazolium tetrafluoroborate. Single crystal X-ray structural analysis evidences that the 1,2,4-dithiazolium ring is almost planar. The 1,2,4-dithiazolium and tetrafluoroborate ions contribute in hydrogen bonding wherein the N-H·N hydrogen bonding in 1,2,4-dithiazolium dimer forms an eight-membered pseudo ring with the R22(8) Etter's graph set. The information provided in this data contributes to the understanding of structural chemistry and hydrogen bonding interactions in dithiazole derivatives.

Linking N2O concentrations in different soil depths to denitrification genes abundances under the influence of an elevated atmospheric CO2 concentrat…

2007

Speed control of the V2 skating technique in elite cross-country skiers

2016

The aim was to examine how skiers control skiing speed using V2-skating. Subjects skied with three submaximal and maximal speeds on 100 m 4° uphill. Cycle variables and force parameters form the arms and legs were analysed. Cycle rate increased up to the maximum speed. Cycle length increased from the slowest speed to the all other speeds. Pole force and delta leg force increased up to the maximum speed. Ranges of motions and angular velocities of kick flexion and extension with knee and hip joints increased till highest submaximal speed. Speed was regulated with cycle length and rate while the latter was dominant after ∼5.0 m/s. Higher speed was reached with higher forces from arms and leg…

Émissions du gaz à effet de serre, N2O, au cours du fonctionnement du cycle de l’azote dans différents compartiments de notre environnement

2007

Réponses de la plante et des microorganismes du sol aux changements environnementaux

2015

Effects of nitrogen fertilization on soil N2O reducing bacteria and their importance for mitigating N2O emissions

2016

EABIOmECT3; Arable soils are a major source of nitrous oxide (N2O). The only known sink in Earth’s biosphere is the reduction of N2O to N2 via the N2O reductase encoded by the nosZ gene, identified as nosZ clade I and II. The nosZI gene is mainly found among denitrifying bacteria, whereas >50% of microorganisms with nosZII lack other denitrification genes. The abundance and phylogenetic diversity of nosZII was previously shown to correlate with a soils N2O sink capacity. To provide a proof of principle, we manipulated 11 indigenous soil microbial communities by increasing the abundance of a non-denitrifying N2O-reducing strain capable of growth with N2O as the only electron acceptor. Conseq…

Enregistrement du cycle du carbone à la transition Oxfordien inférieur-moyen dans l'est du Bassin de Paris

2021

Écologie microbienne du cycle du carbone

2007

Le cycle biogéochimique du carbone.

2013

5 pages; National audience; Bien qu’il ne soit pas l’élément chimique le plus présent sur Terre, le carbone est l’un des composés les plus marquants dans le fonctionnement et l’évolution du système Terre. Un ensemble de processus biogéochimiques nombreux et complexes permet son transfert d’un réservoir à un autre conduisant à un cycle planétaire. Ce dernier est partagé entre un cycle rapide, impliquant les réservoirs atmosphère, océan et biosphère, et un cycle lent, impliquant la croûte terrestre, les sols et l’océan.Le dioxyde de carbone étant un gaz à effet de serre, le cycle du carbone interagit très étroitement avec la machine climatique, aboutissant à la mise en place de boucles de rét…