@article {1854, title = { Geographic and intraspecific variability of mesquitol amounts in Prosopis juliflora trees from Kenya }, journal = { EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS }, volume = {78}, year = {2020}, pages = {801-809}, abstract = {

Several studies have shown that the heartwood of Prosopis juliflora contains high amounts of a naturally rare flavan-3-ol compound identified as 2-(3,4-dihydroxyphenyl)chromane-3,7,8-triol otherwise known as (-)-mesquitol (1). It is known to possess strong antioxidant properties, which may be of valuable interest for further valorization. However, no data exists so far showing the variations of its abundance depending on the different geographic habitats of the tree, the age and the different parts of the tree stem. The variability of flavan-3-ols depending on the geographical area and intra-specific variability within P. juliflora trees from Kenya was addressed in this substantive study. The study was done using wood extracts from three different counties in Kenya (Baringo, Garissa and Turkana Counties). Wood samples were separated into two categories of ages; small trees, aged less than 4 years and the big trees, aged more than 8 years. Each sample was divided into five different parts, which included the bark, sapwood, knot wood, heartwood and the pith. Serial extractions were done by the Dionex accelerated solvent extractor using four solvents in increasing polarity (dichloromethane, acetone, toluene: ethanol (2:1 v/v) and finally water). Gas chromatographic analysis coupled to mass spectrometry was employed to identify the different compounds present in the extracts. LC-MS/MS method was thereafter developed and used to confirm the identity and quantify the amounts of mesquitol present. Two other flavan-3-ols identified and quantified included catechin (2) and 4 \&$\#$39;-O-methylgallocatechin (3). A systematic study on the mass spectra and the observed fragmentations of the flavonoids showed that mesquitol compound is the most abundant compound in P. juliflora with high amounts being found in the heartwood and pith of the acetonic extract (47-72\%). Mesquitol abundance was also found to vary depending on the age of the tree and on the geographical areas.

}, author = {S.C. CHEPKWONY and S. DUMARCAY and H. CHAPUIS and A. KIPROP and P. GERARDIN and C. GERARDIN-CHARBONNIER} } @article {1746, title = { Comparison of teak wood properties according to forest management: short versus long rotation }, journal = { ANNALS OF FOREST SCIENCE }, volume = {75}, year = {2018}, abstract = {

Key message Teak (Tectona grandis L.f.) is one of the most important tropical hardwood tree species, which is widely planted in Indonesia. Wood properties are strongly influenced by forest management conditioning further utilization of wood.

Context In Indonesia, teak wood has been supplied from the state forests (Perhutani) for long rotation teak and from community teak plantations for short rotation teak. Short rotation teak has been harvested at 7-10 years and long rotation teak at 40-60 years.

Aims This paper discusses the characterization of technical properties of short and long rotation teak wood based on the chemical, anatomical, physical, and mechanical properties.

Methods The properties of short rotation and long rotation teak woods were characterized by measuring their density, extractive contents, chemical composition, swelling, wettability, water sorption isotherm, decay resistance, anatomical properties, bending strength (modulus of rupture (MOR), modulus of elasticity (MOE)), and hardness.

Results The results indicate that short rotation teak was not particularly different in swelling, MOE and MOR, and Brinell hardness compared to long rotation teak, although it was less dense and less durable due to lower heartwood and extractive contents. Therefore, careful attention should be given to the use of short rotation teak in some wood-processing technologies.

Conclusion Lower wood density and durability of the short rotation compared to the long rotation teak will restrict its utilization to some extent for both indoor and outdoor applications. Fast-growing teak from community cannot be used as usual heartwood teak from Perhutani because of the very low proportion of useful heartwood in the stem.

}, author = {D.E. RIZANTI and W. DARMAWAN and B. GEORGE and A. MERLIN and S. DUMARCAY and H. CHAPUIS and C. GERARDIN and E. GELHAYE and P. RAHARIVELOMANANA and R.K. SARI and W. SYAFII and R. MOHAMED and P. GERARDIN} } @article {1595, title = { Hydrophobisation of tannin-based foams by covalent grafting of silanes }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {92}, year = {2016}, pages = {116-126}, abstract = {

Thermally insulating foams based on Mimosa bark extracts (Acacia Meansii) were hydrophobised with the aim of decreasing their sensitivity to moisture. Two different formulations leading to rigid foams presenting similar porosity were prepared, and were covalently grafted with three kinds of organosilanes. Non-treated and hydrophobised samples were all thoroughly characterised by FTIR spectroscopy, contact angle measurements and corresponding surface energy calculations, water sorption and thermal conductivity studies. Hydrophobisation produced a significant repellence towards liquid water but did not prevent water vapour sorption. Water uptake, however, was limited compared to the non-treated materials. As a result, the increase of thermal conductivity at high relative humidity was lower after hydrophobisation.

}, url = {https://hal.univ-lorraine.fr/LERMAB-UL/hal-01394526}, author = {C. DELGADO-SANCHEZ and M. LETELLIER and V. FIERRO and H. CHAPUIS and C. GERARDIN and A. PIZZI and A. CELZARD} } @article {1619, title = { Improving Water Repellence and Friability of Tannin-Furanic Foams by Oil-Grafted Flavonoid Tannins }, journal = {BIORESOURCES}, volume = {11}, year = {2016}, pages = {7754-7768}, abstract = {

Tannin-furanic biobased foams, based on the co-reaction of bark-derived condensed tannins and thermoset furanic polymers, have low thermal conductivity, are self-extinguishing, and have high fire resistance, which allows their development for several industrial uses. One of their main drawbacks, however, is the absorption of water within the foam itself. Another problem is the rather friable surface, which is a definite drawback for some potential applications. In this work, these two problems are minimized or eliminated by introducing a component of oil-grafted tannin in the foam formulation. The incorporation of fatty chains markedly decreased foam friability and increased water repellency in the body of the foams. These properties and the compounds formed by fatty acids grafting onto the tannin flavonoids were extensively tested.

}, url = {https://hal.univ-lorraine.fr/hal-01599595}, author = {G. RANGEL and H. CHAPUIS and M.C. BASSO and A. PIZZI and C. DELGADO-SANCHEZ and V. FIERRO and A. CELZARD and C. GERARDIN-CHARBONNIER} } @article {1210, title = {Effects of silencing RET-PTC1 oncogene in papillary thyroid carcinoma by siRNA-squalene nanoparticles with and without fusogenic companion GALA-Cholesterol}, journal = {Thyroid}, volume = {24}, year = {2014}, month = {2014}, chapter = {327}, author = {H.M. ALI and A. MAKSIMENKO and G. URBINATI and H. CHAPUIS and M. RAOUANE and D. DESMAELE and H. YASUHIRO and H. HARASHIMA and P. COUVREUR and L. MASSAAD-MASSAADE} } @article {1209, title = {Effects of siRNA on RET/PTC3 junction oncogene in papillary thyroid carcinoma : from molecular and cellular studies to preclinical investigations.}, journal = {PLoS ONE}, volume = {9}, year = {2014}, month = {2014}, author = {H.M. ALI and G. URBINATI and H. CHAPUIS and D. DESMAELE and J.R. BERTRAND and P. COUVREUR and L. MASSAAD-MASSAADE} } @article {1208, title = {Preactivated Oxazaphosphorines designed for isophosphoramide mustard delivery as bulk form or nanoassemblies: synthesis and proof of concept. }, journal = {J. Med. Chem}, year = {2014}, month = {2014}, author = {C. SKARBEK and L. LESUEUR and H. CHAPUIS and A. DEROUSSENT and C. PIOCHE-DURIEUR and A. DAVILLE and J. CARON and M. RIVARD and T. MARTENS and J.R. BERTRAND and E. LE-CAM and G. VASSAL and P. COUVREUR and D. DESMAELE and A. PACI} } @article {1203, title = {Effect of hydrocarbon stapling on the properties of alpha-helical antimicrobial peptides isolated from the venom of hymenoptera}, journal = {Amino Acids}, volume = {43}, year = {2012}, month = {2012}, chapter = {2047}, author = {H. CHAPUIS and J. SLANINOVA and L. BEDNAROVA and L. MONINCOVA and M. BUDESINSKY and V. CEROVSKY} } @article {1204, title = {Synthesis of 6-substituted 2(1H)-pyridon-3-yl C-2{\textquoteright}-deoxyribonucleosides}, journal = {Eur. J. Org. Chem. }, year = {2012}, month = {2012}, chapter = {1759}, author = {H. CHAPUIS and T. KUBELKA and N. JOUBERT and L. SLAVETINSKA and M. HOCEK} }