BackgroundRheumatic heart disease (RHD) affects more than 33,000,000 individuals, mostly from low- and middle-income countries. The Cape Town Declaration On Access to Cardiac Surgery in the Developing World was published August 2018, signaling commitment of global cardiac surgery cardiology communities improving care for RHD patients.MethodsAs formed basis which Intersociety Alliance (CSIA) for...

Compound-specific stable isotope analysis (CSIA) of amino acids (AA) has rapidly become a powerful tool in studies of food web architecture, resource use, and biogeochemical cycling. However, applications to avian ecology have been limited because no controlled studies have examined the patterns in AA isotope fractionation in birds. We conducted a controlled CSIA feeding experiment on an avian ...

An innovative approach based on the combination of analytical pyrolysis coupled with gas chromatography-mass spectrometry (Py-GC/MS) compound-specific isotope analysis (Py-CSIA) is used to study composting process maize biomass. This multidisciplinary aims elucidate decomposition rate main biogenic materials (lignin, cellulose, proteins, lipids, and waxes) responses process. According Py-GC/MS ...

Zooplankton contribute a major component of the vertical flux particulate organic matter to ocean interior by packaging consumed food and waste into large, dense fecal pellets that sink quickly. Existing methods for quantifying contribution use either visual identification or lipid biomarkers, but these may exclude material is not morphologically distinct, include zooplankton carcasses in addit...

* Laboratoire de Recherche en Informatique, bât. 490, Université de Paris-Sud, F-91405, Orsay, (France). ** SLIGOS, CSIA, Tour Anjou, 33 quai de Dion Bouton, F92814 Puteaux cedex (France) ° LAFORIA-IBP, Université Paris 6, 4 place Jussieu, F-75232 Paris cedex 05, (France). # Department of Data Analysis, Institute of Mathematics & Informatics, Akademijos 4, Vilnius 2600, (Lithuania).

We studied the benzylsuccinate synthase (Bss) reaction mechanism with respect to the hydrogen-carbon bond cleavage at the methyl group of toluene by using different stable isotope tools. Λ values (slopes of linear regression curves for carbon and hydrogen discrimination) for two-dimensional compound-specific stable isotope analysis (2D-CSIA) of toluene activation by Bss-containing cell extracts...

Compound-specific isotopic analysis (CSIA) and geochemical modeling were applied to evaluate the effectiveness of an 800 m-long sequential in situ bioremediation (ISB) system Northern Italy. The was created for clean-up a polluted aquifer affected by chloroethenes. A hydraulically upgradient anaerobic (AN)-biobarrier-stimulated reductive dichlorination (RD) higher chloroethenes (PCE, TCE) downg...

Dietary docosahexaenoic acid (DHA, 22:6n-3) not only increases blood and tissue levels of DHA, but also eicosapentaenoic acid (EPA, 20:5n-3). It is generally believed that this increase is due to DHA retroconversion to EPA, however, a slower conversion of α-linolenic acid (ALA, 18:3n-3) derived EPA to downstream metabolic products (i.e. slower turnover of EPA) is equally plausible. In this stud...

Polyethylene is probably the most used plastic material in daily life and its accurate analysis is of importance. In this communication the chemical structure of polyethylenes is studied in detail using conventional analytical pyrolysis (Py-GC/MS), bulk stable isotopic analysis (IRMS) and pyrolysis compound specific stable isotopic analysis (Py-CSIA) to measure stable isotope proportions (δ(13)...