@article {1779, title = {Green extraction process of tannins obtained from Moroccan Acacia mollissima barks by microwave: Modeling and optimization of the process using the response surface methodology RSM}, journal = { ARABIAN JOURNAL OF CHEMISTRY }, volume = {12}, year = {2019}, pages = {2668-2684}, abstract = {

The effect of extraction conditions on polyphenols contents and condensed tannins by microwave-assisted extraction (MAE) was studied for the first time to our knowledge. Moroccan barks of Acacia mollissima was used to extract phenolic compounds. The variables studied are the following: power extraction, time extraction and solvent nature. Five powers extraction were tested: 150 W, 250 W, 300 W, 450 W and 600 W. A significant effect of power extraction on the extractable nature was proved by ANOVA and Student test. The yields were also affected by time extraction. Different solvent (water, ethanol, methanol and ethyl acetate) were tested to evaluate the best extraction solvent according to the extractable nature. Highest polyphenols contents were obtained with methanol. The proportion of this solvent, time extraction and power extraction were optimized using the response surface methodology (RSM). A face-centered composite design (FCCD) was applied to evaluate the effects of these variables on the polyphenols and condensed tannins contents. For each experiment, the extraction yield, the total polyphenolic contents and the condensed tannins contents were quantified using colorimetric essays. The extracts were characterized by their reactivity to formaldehyde and reverse phase high pressure liquid chromatography (RP-HPLC). The highest polyphenols content was obtained at 156 W using 80\% of methanol during 5 min. For condensed tannins, the highest content of cyanidin was obtained at 182 W using 20\% of methanol during 3.66 min. RSM applied in MAE, permitted to develop green extraction process of polyphenols and tannins extracted, using lower microwave power and methanol proportion with a shortest time extraction and in the same time improve the quantity of extractables obtained from renewable natural resource.

}, url = {https://hal.univ-lorraine.fr/LERMAB-UL/hal-01597950}, author = {N. RHAZI and H. HANNACHE and M. OUMAM and A. SESBOU and B. CHARRIER and A. PIZZI and F. CHARRIER-EL-BOUHTOURY} } @article {1747, title = { Chemical composition of African mahogany (K. ivorensis A. Chev) extractive and tannin structures of the bark by MALDI-TOF }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {113}, year = {2018}, pages = {167-178}, abstract = {

The total phenolic and the condensed tannins content of the bark, the sapwood and the heartwood of Khaya ivorensis (K. ivorensis) from the natural forest of Gabon was investigated by Folin-Ciocalteu, vanillic assay and acid/butanol methods All these methods showed that the bark, the sapwood and the heartwood of K. ivorensis did not display a significant difference (p \> 0.05) regarding their phenolic content and their condensed tannins content as well. The acetone/water extracted tannins from the bark were characterized by Matrix Assisted Laser Desorption/Ionization time of flight (MALDI-TOF) mass spectrometry and by Fourier Transform InfraRed spectroscopy (FTIR). The presence of fisetinidin, gallocatechin, and trihydroxyflavan monomers was observed for the first time. Flavonoid oligomers linked to sugars were found within K. ivorensis condensed tannins. An heptamer formed by mixed fisetinidin, trihydroxyflavan, three dihydroxyflavans, and a carbohydrate dimer including mannose was also identified for the first time in the bark of K. ivorensis. That mahogany hardwood species did not exhibit any antifungal activity against the white rot fungus Coriolus versicolor. However, bark powder decreased the radial fungus growth.

}, url = {https://hal.archives-ouvertes.fr/hal-01710611}, author = {A.B.B. ATHOMO and S.P.E. ANRIS and R. SAFOU-TCHIAMA and F.J. SANTIAGO-MEDINA and T. CABARET and A. PIZZI and B. CHARRIER} } @article {1592, title = { Characterization of sumac (Rhus tripartitum) root barks tannin for a potential use in wood adhesives formulation }, journal = { WOOD SCIENCE AND TECHNOLOGY }, volume = {49}, year = {2015}, pages = {205-221}, abstract = {

The phenolic composition of sumac root barks was studied. Colorimetric assays, FT-IR and NMR were used to examine the phenolic composition and tannins nature. Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry was used to examine the structure of the tannin oligomers. TGA analysis was used to study the thermal stability of sumac tannin extract. Analyzes showed that sumac root barks are rich in condensed tannins, especially procyanidin and prodelphinidin types. Flavonoid oligomers of dimers, trimers, tetramers, pentamers and hexamers kind were detected in MALDI-TOF-positive ion mode analysis. TGA analysis showed thermal stability of sumac tannins compared to other condensed tannin types and pomegranate hydrolyzable tannins.

}, url = {https://hal.archives-ouvertes.fr/hal-02009673}, author = {S. BEN-MAHMOUD and H. SAAD and B. CHARRIER and A. PIZZI and K. RODE and N. AYED and F. CHARRIER-EL-BOUHTOURY} } @article {1561, title = { Comparison of the impact of different extraction methods on polyphenols yields and tannins extracted from Moroccan Acacia mollissima barks }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {70}, year = {2015}, pages = {245-252}, abstract = {

The performance of three techniques, conventional maceration at room temperature, infusion and microwave assisted extraction, was evaluated to extract polyphenols, condensed and hydrolysable tannins from Moroccan barks of Acacia mollissima. A comparison of these methods was performed using colorimetric assays. For each technique, the effect of extraction conditions on the yield extracts was evaluated. The variables studied are: solvent nature, barks ages, time extraction, power extraction and heat interaction with solvent nature and barks ages. This study proved that the choice of solvent extraction was a relation of the extraction method used and the extractible nature (polyphenols, condensed or hydrolysable tannins). Methanol was the best solvent to extract tannin and polyphenols using maceration at room temperature, and ethanol was the best for infusion at 60 degrees C. Microwave was more selective to extract polyphenols and tannins under extraction solvent used. Highest polyphenols contents was obtained using methanol. For condensed and hydrolysable tannins, the highest were obtained using water. The polyphenols contents extracted using maceration was closed to the yield obtained with microwave, 354 mg GAE/g bark, 442 mg GAE/g bark, respectively. This study proved the pertinence of traditional methods to extract polyphenols and tannins compared to the new extraction method (microwave). The best polyphenols yields, condensed and hydrolysable tannins were obtained by microwave followed by the yield obtained by maceration and finally the yield obtained by infusion.

}, url = {https://hal.univ-lorraine.fr/hal-01595994}, author = {R. NAIMA and M. OUMAM and H. HANNACHE and A. SESBOU and B. CHARRIER and A. PIZZI and F.C. EL-BOUHTOURY} } @article {1576, title = { Microwave assisted extraction of maritime pine (Pinus pinaster) bark: Impact of particle size and characterization }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {65}, year = {2015}, pages = {142-149}, abstract = {

The effect of particle size on the extraction of tannins by microwave assisted extraction (MAE) was studied for the first time to our knowledge. Maritime pine (Pinus pinaster) bark from the South West of France was sieved into five ranges of particle size before extraction was carried out in an ethanol-water solution. For each extraction, the extraction yield, the total polyphenolic content, the condensed tannins content, and the sugar content were quantified. The extracts were characterized by their reactivity to formaldehyde, Fourier transformed infrared spectroscopy (FTIR), H-1 NMR, and heteronuclear single correlation spectroscopy-2D NMR (HSQC 2D NMR). The MAE was also compared to a hot water based extraction. The effect of the particle size on the extraction efficiency was studied. The HSQC 2D NMR revealed that (epi) catechin, epicatechin gallate, epigallocatechine, and epigallocatechine gallate were obtained. Higher amounts of condensed tannins, sugars, and simple flavonoids were extracted by MAE extraction.

}, url = {https://hal.univ-lorraine.fr/hal-01599786}, author = {L. CHUPIN and S.L. MAUNU and S. REYNAUD and A. PIZZI and B. CHARRIER and F. CHARRIER-EL-BOUHTOURY} } @article {1571, title = { Pine (P. pinaster) and quebracho (S. lorentzii) tannin-based foams as green acoustic absorbers }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {67}, year = {2015}, pages = {70-73}, abstract = {

Open cells structure tannin-furanic foams prepared using two different types of tannins have been shown to give good sound absorption/acoustic insulation characteristics at medium and high frequencies (1000-4000 Hz) with coefficients of acoustic absorption of 0.85-0.97. Their acoustic absorption coefficient was lower 0.40-0.60 at lower frequencies (250-500 Hz). Compared with commercial foams, tannin-furanic foams have the same typical behavior of light porous materials. The more open-cell is the material the better is its sound absorption. Thicker samples absorb better at medium frequencies for all types of porous material tested.

}, url = {https://hal.archives-ouvertes.fr/hal-01294760}, author = {C. LACOSTE and M.C. BASSO and A. PIZZI and A. CELZARD and E.E. EBANG and N. GALLON and B. CHARRIER} } @article {1575, title = { Study of thermal durability properties of tannin-lignosulfonate adhesives }, journal = { JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY }, volume = {119}, year = {2015}, pages = {1577-1585}, abstract = {

This paper aims to study certain aspects of the preparation of tannin-lignin adhesives. Mimosa tannins and lignosulfonates were used in wood adhesives formulation to substitute resins based on formaldehyde. Two ammonium lignosulfonates and two sodium lignosulfonates were glyoxalated to be more reactive. The thermal stability of the lignosulfonates before and after glyoxalation was analysed by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The proportion of mimosa tannins and sodium lignosulfonates varied from 20 \% tannins to 60 \% tannins. 40 \% of mimosa tannins were mixed with either glyoxalated sodium lignosulfonates or glyoxalated ammonium lignosulfonates. The thermal properties of the resins were studied by TG, DSC and thermomechanical analysis (TMA). The results showed that after glyoxalation, the degradation of lignosulfonates started at 125 A degrees C instead of 171 A degrees C for the non-glyoxalated lignosulfonates. The results obtained showed that the 40 mass\% tannins resin was the most efficient. The TMA results showed that the curing of the resins started at 100-110 A degrees C. The TG and DSC results of the cured resins showed a thermal stability of the adhesives up to approximately 200 A degrees C.

}, url = {https://hal.univ-lorraine.fr/hal-01597717}, author = {L. CHUPIN and B. CHARRIER and A. PIZZI and A. PERDOMO and F. CHARRIER-EL-BOUHTOURY} } @article {1405, title = {Valorisation of Tunisian pomegranate peels tannins in green adhesives formulations}, journal = { J. Renew. Mat}, volume = {3(1)}, year = {2015}, pages = {34-43}, author = {H. SAAD and A. PIZZI and B. CHARRIER and N. AYED and K. RODE and F. CHARRIER-EL-BOUHTOURY and F. BOUHTHOURY} } @article {1166, title = {MALDI-TOF analysis of Aleppo pine (Pinus haleppensis) bark tannin. }, journal = {BioRessources}, volume = {9}, year = {2014}, month = {2014}, chapter = {3396}, author = {S. ABDALLA and A. PIZZI and N. AYED and F. CHARRIER-EL-BOUTHOURY and B. CHARRIER and F. BAHABRY and A GANASH} } @article {1200, title = {Study of thermal durability properties of tannin lignosulphonate adhesives }, journal = {J. Thermal Anal. Calorimetry}, year = {2014}, month = {2014}, author = {L. CHUPIN and B. CHARRIER and A. PIZZI and A. PERDOMO and F. CHARRIER-EL-BOUHTOURY} } @article {674, title = {Characterisation of maritime pine (Pinus pinaster) bark tannins extracted under different conditions by spectroscopic methods, FTIR and HPLC}, journal = {Ind.Crops \& Prods.}, volume = {49}, year = {2013}, month = {2013}, chapter = {897-903}, author = {L. CHUPIN and C. MOTILLON and F. CHARRIER-EL-BOUHTOURY and A. PIZZI and B. CHARRIER} } @article {637, title = {Evaluation of mechanical and physical properties of industrial particleboard bonded with a corn flour-urea-formaldehyde adhesive}, journal = {Composites: part B}, volume = {44}, year = {2013}, month = {2013}, chapter = {48-51}, author = {A. MOUBARIK and H.R. MANSOURI and A. PIZZI and A. ALLAL and F. CHARPIER and M.A. BADIA and B. CHARRIER} } @article {684, title = {Mechanical characterization of industrial particleboard panels glued with cornstarch- mimosa tannin- urea formaldehyde resins}, journal = {J.Adh.Sci.Technol}, volume = {27}, year = {2013}, month = {2013}, chapter = {423-429}, author = {A. MOUBARIK and A. PIZZI and F. CHARRIER and A. ALLAL and M-A. BADIA and H.R. MANSOURI and B. CHARRIER} } @article {528, title = {Characterization of pomegranate peel tannin extractives}, journal = {Ind.Crops \& Products}, volume = {40}, year = {2012}, month = {2012}, chapter = {239-246}, author = {H. SAAD and F. CHARRIER-EL-BOUHTOURY and A. PIZZI and K. RODE and B. CHARRIER and N. AYED} }