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Mohamed Traoré

Bio: Mohamed Traoré is an academic researcher from University of Santiago de Compostela. The author has contributed to research in topics: Medicine & Crop. The author has an hindex of 5, co-authored 8 publications receiving 185 citations. Previous affiliations of Mohamed Traoré include École Normale Supérieure & University of Lorraine.
Topics: Medicine, Crop, Nutrient, Chemical composition, Arid

Papers
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Journal ArticleDOI
TL;DR: Molecular characterization by analytical pyrolysis of selected samples from each wood type confirmed the interpretation of the mechanisms behind the variability in wood composition obtained by the FTIR-ATR.

140 citations

Journal ArticleDOI
TL;DR: Results show that FTIR-ATR in combination with multivariate statistics can be a useful tool for species identification and provenancing for pine wood samples of unknown origin.
Abstract: Attenuated total reflectance-Fourier transform infrared (FTIR-ATR) spectroscopy was applied to 120 samples of heartwood rings from eight individual pine trees from different locations in Spain. Pinus sylvestris cores were collected at the Artikutza natural park (Ps-ART). Pinus nigra cores were collected in Sierra de Cazorla (Pn-LIN) and in La Sagra Mountain (Pn-LSA). Three discriminant analysis tests were performed using all bands (DFT), lignin bands only (DFL) and polysaccharides bands only (DFP), to explore the ability of FTIR-ATR to separate between species and growing location. The DFL model enabled a good separation between pine species, whereas the DFP model enabled differentiation for both species and growing location. The DFT model enabled virtually perfect separation, based on two functions involving twelve FTIR bands. Discrimination between species was related to bands at 860 and 1655 cm-1, which were more intense in P. sylvestris samples, and bands at 1425 and 1635 cm-1, more intense in P. nigra samples. These vibrations were related to differences in lignin structure and polysaccharide linear chains. Discrimination between growing locations was mainly related to polysaccharide absorptions: at 900, 1085 and 1335 cm-1 more representative of Pn-LIN samples, and at 1105 and 1315 cm-1 mostly associated to Pn-LSA samples. These absorptions are related to β-glycosidic linkages (900 cm-1), cellulose and hemicellulose (C-O bonds, 1085 and 1105 cm-1) and content in amorphous/crystalline cellulose (1315 and 1335 cm-1). These results show that FTIR-ATR in combination with multivariate statistics can be a useful tool for species identification and provenancing for pine wood samples of unknown origin.

107 citations

Journal ArticleDOI
TL;DR: In this paper, principal component analysis (PCA) was performed on pyrolysis data of sound woods and shipwreck woods of Pinus sp. and Quercus sp., to identify the impact of diagenesis on pyrotelysis fingerprints.

21 citations

Journal ArticleDOI
TL;DR: In this article, a set of oak and pine tree-ring chronologies have been developed from living trees covering the past 500 and 800 years, respectively, and have served to confirm the provenance of the wood used in an 18th-century Spanish ship of the Royal Navy.

18 citations

Journal ArticleDOI
TL;DR: In this article, Fourier Transform Infrared spectroscopy (FTIR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) were used for provenance studies of archaeological wood.

14 citations


Cited by
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01 Jan 2016

803 citations

Journal ArticleDOI
TL;DR: This protocol describes a quantitative 31P NMR spectroscopy approach for the analysis and determination of hydroxyl groups on biorefinery resources such as lignins and tannins.
Abstract: The analysis of chemical structural characteristics of biorefinery product streams (such as lignin and tannin) has advanced substantially over the past decade, with traditional wet-chemical techniques being replaced or supplemented by NMR methodologies. Quantitative 31P NMR spectroscopy is a promising technique for the analysis of hydroxyl groups because of its unique characterization capability and broad potential applicability across the biorefinery research community. This protocol describes procedures for (i) the preparation/solubilization of lignin and tannin, (ii) the phosphitylation of their hydroxyl groups, (iii) NMR acquisition details, and (iv) the ensuing data analyses and means to precisely calculate the content of the different types of hydroxyl groups. Compared with traditional wet-chemical techniques, the technique of quantitative 31P NMR spectroscopy offers unique advantages in measuring hydroxyl groups in a single spectrum with high signal resolution. The method provides complete quantitative information about the hydroxyl groups with small amounts of sample (~30 mg) within a relatively short experimental time (~30–120 min). This protocol describes a quantitative 31P NMR spectroscopy approach for the analysis and determination of hydroxyl groups on biorefinery resources such as lignins and tannins.

211 citations

Journal ArticleDOI
TL;DR: Wang et al. as discussed by the authors developed a facile pyrrole polymerization method to acquire polypyrrole decorated wood (PPy-wood) for solar evaporation enhancement.
Abstract: Wood is gaining increasing attention in applications related to solar steam generation because of its porous structure with microchannels, low heat conduction properties, highly hydrophilic properties and renewability. Wood surface modification is required to improve steam generation performance because of its low optical absorptivity. Unfortunately, the high energy consumption fabrication process and high cost of current photothermal conversion coatings on wood impede its large-scale application. This study develops a facile pyrrole polymerization method to acquire polypyrrole decorated wood (PPy–wood) for solar evaporation enhancement. The black PPy decoration considerably improves the wood light absorption, resulting in a high absorbance (>90%) of PPy–wood within a broad wavelength range, from the ultraviolet region to the near infrared region (300–2500 nm). The combination of advantages related to wood (microchanneled porous structure, high hydrophilicity and thermal insulation) and PPy (broadband and high solar absorption capacity) for easy and fast steam generation makes PPy–wood an ideal solar steam generator, which shows rapid evaporation abilities (1.014 kg m−2 h−1) and high evaporation efficiency (72.5%) under simulated one sun irradiation. Moreover, the obtained clean water using PPy–wood as the steam generator shows low ion concentrations and high transmittance, demonstrating that PPy–wood possesses excellent potential for seawater desalination and sewage treatment. Thus, such PPy–wood is a potential candidate for water desalination and purification to address water scarcity issues through the effective utilization of clean energy.

163 citations

01 Jan 1981
TL;DR: The authors examines the basic principles of wood chemistry and its potential applications to pulping and papermaking, wood and wood waste utilization, pulping by-products for production of chemicals and energy, and biomass conversion.
Abstract: Wood Chemistry, Fundamentals and Applications, Second Edition, examines the basic principles of wood chemistry and its potential applications to pulping and papermaking, wood and wood waste utilization, pulping by-products for production of chemicals and energy, and biomass conversion.

155 citations