WorldCat Identities

Dumarcay, Stéphane

Overview
Works: 22 works in 22 publications in 2 languages and 36 library holdings
Roles: Other, Contributor, Thesis advisor, Opponent, Author
Publication Timeline
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Most widely held works by Stéphane Dumarcay
Comparison of different treatments based on glycerol or polyglycerol additives to improve properties of thermally modified wood by Mahdi Mubarok( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Comparison of teak wood properties according to forest management: short versus long rotation by Dwi Erikan Rizanti( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Tartaric acid catalyzed furfurylation of beech wood by Prabu Satria Sejati( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Knot extractives: a model for analysing the eco-physiological factors that control the within and between-tree variability by Zineb Kebbi-Benkeder( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Quantification and characterization of knotwood extractives of 12 European softwood and hardwood species by Zineb Kebbi-Benkeder( )

1 edition published in 2014 in English and held by 2 WorldCat member libraries worldwide

Molecular recognition of wood polyphenols by phase II detoxification enzymes of the white rot Trametes versicolor by Mathieu Schwartz( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Towards a Synthesis of Glucidic Phosphoenol Pyruvic Acid Derivatives( )

1 edition published in 1999 in English and held by 2 WorldCat member libraries worldwide

Control of wood thermal treatment and its effects on decay resistance: a review by Kévin Candelier( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Non-biocide antifungal and anti-termite wood preservation treatments based on combinations of thermal modification with different chemical additives by Mahdi Mubarok( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Feasibility study of utilization of commercially available polyurethane resins to develop non-biocidal wood preservation treatments by Mahdi Mubarok( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Total phenolic and lignin contents, phytochemical screening, antioxidant and fungal inhibition properties of the heartwood extractives of ten Congo Basin tree species by Steeve Mounguengui( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

Quantitative and qualitative composition of bark polyphenols changes longitudinally with bark maturity in Abies alba Mill by Maree Brennan( )

1 edition published in 2020 in English and held by 2 WorldCat member libraries worldwide

Decay and termite resistance of pine blocks impregnated with different additives and subjected to heat treatment by Solafa Salman( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

Les anions des dérivés d'acides dihalogénoacétiques : des réactifs clés pour la conception d'antibiotiques inhibiteurs de phosphoénolpyruvate lyases et de la chitine-synthétase by Stéphane Dumarcay( )

1 edition published in 1998 in French and held by 1 WorldCat member library worldwide

Des carbanions énolates dérivés de dihalogénoacétates d'alkyles sont utilisés en réaction de condensation de type darzens sur des dialdoses pour obtenir des dérivés d'esters glycidiques et d'-cetoesters C-glycosyles, composés-clé dans la synthèse de molécules biologiquement actives. Le besoin en nouveaux antibiotiques permettant de combattre le phénomène de résistance croissante aux antibactériens actuels des bactéries gram-négatives notamment, a conduit à la synthèse d'une nouvelle famille d'inhibiteurs des phosphoénolpyruvate lyases, enzymes indispensables à la construction de la paroi bactérienne : les phosphoénolpyruvates glucidiques sont obtenus par réaction de type perkow de trialkylphosphites sur les esters glycidiques ou les -cetoesters. L'utilisation de dibromoacétonitrile en réaction de darzens permet l'accès à des dérivés d'-bromo acides, précurseurs immédiat d'-aminoacides C-glycosyles qui sont des intermédiaires de choix dans la synthèse d'une grande variété de produits actifs biologiquement et en particulier celle des polyoxines, de puissant fongicides dont une nouvelle méthode d'accès performante est proposée
Molecular recognition of wood polyphenols by phase II detoxification enzymes of the white rot Trametes versicolor( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Différence de couleur entre duramen et aubier du bois de Pin maritime : identification moléculaire, homogénéisation et évolution by Jérémy Mehats( )

1 edition published in 2020 in French and held by 1 WorldCat member library worldwide

Maritime pine is one of the most common softwood found in South West of France, covering more than 10% of the total forestry area of the country. With the development of the petroleum-based chemistry, maritime pine has been mostly used for its wood that possesses some good mechanical properties, for the elaboration of materials for packaging purposes (ex: wood pallet) or engineered wood products for structural applications. Nevertheless, due to consumers' feedbacks and to requirements specifications, the industries identified a major issue: the color difference between heartwood and sapwood.Heartwood is known to have a brown reddish color contrary to sapwood, which have a pale yellow tint. This coloration difference results in a depreciation of the commercial value of the finished material. Thus, industrials are looking for treatments to homogenize the color and to valorize all their productsThe purpose of this PhD is firstly to identify the chromophores that are responsible of this color differences between the two wood structures and then to develop an homogenisation treatment based on the paper industry processes, particularly using alkaline hydrogen peroxide chemistry
Caractérisation des transformations physico-chimiques intervenant lors de la thermodégradation du bois. Influence de l'intensité de traitement, de l'essence et de l'atmosphère by Kévin Candelier( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

Le traitement thermique est basé sur la modification chimique des biopolymères par thermodégradation, en évitant l'ajout de produits chimiques. Ce traitement améliore la stabilité dimensionnelle et la durabilité fongique du bois. Ces améliorations se font au détriment des propriétés mécaniques qui ont tendance à s'affaiblir. Aujourd'hui, plusieurs types de procédés sont utilisés. Ils se distinguent entre autre par la nature du milieu dans lequelle se déroule le traitement. La durabilité de ce nouveau matériau bois est liée au degré de thermodégradation, dépendant des conditions et de l'intensité du traitement. Un pilote de traitement par conduction, travaillant sous vide ou sous azote, mesurant la masse en dynamique est utilisé afin de mieux comprendre l'influence de l'atmosphère. Les résultats obtenus montrent que l'utilisation du vide permet d'éliminer, de l'enceinte de traitement, les produits volatils formées au cours du traitement conduisant à des taux de lignine de Klason plus faibles du fait de la non recondensation des produits de dégradation. Cette limitation de recondensation des produits volatiles engendre des pertes de masse, pour une même intensité de traitement plus faibles, confirmés par des taux de polysaccharides plus élevés pour un traitement sous vide. Des études de cinétiques des réactions de thermodégradation ont confirmé la plus grande sensibilité des feuillus vis-à-vis de la thermodégradation (comparé aux résineux). De plus, ces analyses ont permis d'identifier les principaux produits de thermodégradation du bois qui varient en fonction de l'intensité du traitement et a permis de montrer une thermosensibilité plus importante de la lignine que de l'holocelluloses pour la gamme de températures utilisée. Le fruit de ces travaux est donc une progression significative des connaissances de bases sur les mécanismes de thermodégradation et leurs relations avec les paramètres de traitement
Caractérisation HPLC de marqueurs permettant de prévoir l'évolution de certaines propriétés macroscopiques du bois lors de différents processus de dégradation by Wenceslas Steeve Mounguengui( )

1 edition published in 2008 in French and held by 1 WorldCat member library worldwide

The identification of markers able to highlight and quantify wood deterioration by different degradation agents can be of great interest in the development of material control methods. In the first part of this work, the characterization and the quantification of the two non durable wood species extractives, beech and silky oak, treated or not with propiconazole and exposed to various white rot or brown rot fungi were carried out. The evolution of the quantity and the nature of extractives depend directly on the presence of biocide and allowed to clearly differentiate degraded and non-degraded samples. This is particularly true in the case of catechin identified in the extracts of beech, which is rapidly degraded by rotting fungi constituting therefore a valuable marker of wood degradation. In the second part of this work, the evolution of the chemical composition of wood treated by mild pyrolysis at 240°C under nitrogen was investigated. Although the results mainly confirm those described previously in the literature, isolation of lignin and holocellulose fractions and analysis of monosaccharides constitutive of holocellulose fraction highlighted an important carbonization of wood reported up to now for higher temperatures. This phenomenon is confirmed by 13C NMR and could be at the origin of some of the new properties of the material
Modification chimique d'antioxydants pour les rendre lipophiles : application aux tannins by Bouddah Poaty-Poaty( )

1 edition published in 2009 in French and held by 1 WorldCat member library worldwide

In the order to use natural antioxidants in lipidic substances, we wanted to make lipophilic of tannins by grafting on them carbonaceous chains through mild and simple chemical modifications. First, we used model substrates of tannins (phenol, catechol, gallic acid and mostly catechin) in experiments of alkylation, acylation, esterification by a fatty acid or a fatty alcohol, or, with regard to catechin, grafting of a carbonaceous chain variable length by a coupling reaction of the oxa-Pictet-Spengler type between the cycles C and B. Then, an application of the same synthesis to tannins of chestnut (Castanea sativa), oak (Quercus pedunculata), quebracho (Schinopsis balansae) and grape seed (Vitis vinifera) was a success, especially for the coupling oxa-Pictet-Spengler. All derivatives of model molecules or rough tannins acquired a lipophilic character as proven by the measurement of the coefficient of partition between water and the octanol. The antioxidant properties of model molecules, rough and modified tannins were measured by two methods: inhibition of the induced oxidation of the methyl linoleate and reactivity with the free radical 2,2-diphenyl-picrylhydrazyle (DPPH). The antioxidant properties are well preserved after modification
 
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Audience level: 0.96 (from 0.77 for Molecular ... to 0.97 for Decay and ...)

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English (15)

French (5)