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Modification of Wood by Tannin-Furfuryl Alcohol Resins-Effect on Dimensional Stability,Mechanical Properties and Decay Durability

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Journal of Renewable Materials 2023年第2期11卷 505-521页

作者： Mahdi Mubarok christine gérardin-Charbonnier Elham Azadeh Firmin Obounou AkongStéphane Dumarçay Antonio Pizzi Philippe gérardin Universitéde Lorraine INRAEUR 4370 USC 1445 LERMABFacultédes Sciences et TechnologiesNancyFrance 2 Forest Product Sciences and TechnologyFaculty of Forestry and EnvironmentIPB UniversityBogorIndonesia

Furfurylation is a well-known wood modification *** paper studied the effect of tannin addition on the wood *** kinds of dicarboxylic acids,adipic acid,succinic acid,and tartaric acid,as well as glyoxal as a comparing agent,were used to catalyse the polymerisation of furanic or tannin-furanic solutions during wood *** of furanic or tannin-furanic solution at a certain concentration into the wood followed with curing at 103℃for a specific duration was performed for the wood *** properties of the modified woods like dimensional stability,resistance of treatment to leaching,mechanical properties,decay durability against white-rot(Coriolus versicolor,Pycnoporus sanguineus)and brown-rot(Coniophora puteana)as well as their chemical and anatomical characteristics were *** revealed that the partial substitution of FA by the tannins improved the fixation of the chemicals impregnated in ***,dimensional stability,leaching resistance,Brinell hardness,modulus of elasticity/modulus of rupture,and decay durability properties of the furfurylated wood were also improved in the presence of *** electron microscopy revealed the deposition of the polymer in the wood lumen cells and in the wood cell walls.

关键词： Decay durability furfuryl alcohol leaching resistance mechanical properties tannin

Biomolecules of Interest Present in the Main Industrial Wood Species Used in Indonesia-A Review

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Journal of Renewable Materials 2021年第3期9卷 399-449页

作者： Resa Martha Mahdi Mubarok Wayan Darmawan Wasrin Syafii Stéphane Dumarcay christine gérardin Charbonnier Philippe gérardin Universitéde Lorraine Institut National de Recherche pour l’Agriculturel’Alimentation et l’EnvironnementLaboratoire d'Etudes et de Recherche sur le Matériau BoisNancyFrance Department of Forest Products Faculty of Forestry and EnvironmentInstitut Pertanian BogorBogor UniversityBogorIndonesia

As a tropical archipelagic country,Indonesia’s forests possess high biodiversity,including its wide variety of wood *** of biomolecules released from woody plant extracts has been gaining attractive interests since in the middle of 20th *** paper focuses on a literature review of the potential valorisation of biomolecules released from twenty wood species exploited in *** has revealed that depending on the natural origin of the wood species studied and harmonized with the ethnobotanical and ethnomedicinal knowledge,the extractives derived from the woody plants have given valuable heritages in the fields of medicines and *** families of the bioactive compounds found in the extracts mainly consisted of flavonoids,stilbenes,stilbenoids,lignans,tannins,simple phenols,terpenes,terpenoids,alkaloids,quinones,and *** addition,biological or pharmacological activities of the extracts/isolated phytochemicals were recorded to have antioxidant,antimicrobial,antifungal,anti-inflammatory,anti-diabetes,anti-dysentery,anticancer,analgesic,anti-malaria,and anti-Alzheimer *** from these remarkable characteristics of woody plant extractives,further studies concerning the valorisation of these extractives in the fields of nutraceutical,cosmetic,bio-control,bio-stimulation,and other advanced applications would be of interest.

关键词： Bark by-product bioactivity extractive Indonesia industry molecule valorization wood species

Feasibility Study of the Synthesis of Isocyanate-Free Polyurethanes from Catechin

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Journal of Renewable Materials 2022年第5期10卷 1175-1184页

作者： Wissem Sahmim Febrina Dellarose Boer Hubert Chapuis Firmin Obounou-Akong Antonio Pizzi Philippe gérardin christine gérardin-Charbonnier Facultédes Sciences et Technologies Laboratoire d’Etudes et de Recherche sur le Matériau BoisEA 4370-USC INRAEUniversitéde LorraineNancy54506France Laboratoire d’Etudes et de Recherche sur le Matériau Bois EA 4370-USC INRAEUniversitéde LorraineEpinal88000France

With the current trend of increasing efforts to develop non-isocyanate-based polyurethanes(NIPUs),this study aimed to check the feasibility of the development of a method using cyclic carbonate modified catechin and amine to synthesis non-isocyanate urethane with the objective to further extend these results to polyurethane *** methods used in this study consist of four steps:glycidilation of catechin,hydrolysis of epoxide,cyclic carbonate synthesis,and carbamate synthesis through condensation of *** resulting products were analyzed using FTIR(Fourier transform infrared)spectroscopy and NMR(nuclear magnetic resonance)*** results showed that carbamate could be successfully obtained through this four-steps synthesis,opening the possibility to further developments for the synthesis of polyurethanes starting from catechin and condensed tannins.

关键词： Catechin cyclic carbonate isocyanate-free glycidilation carbamate

One Step Regioselective Acylation of Polyphenolic Wood Extractive and Its Application for Wood Treatment

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Journal of Renewable Materials 2022年第6期10卷 1491-1503页

作者： Wissem Sahmim georges Eid Febrina Dellarose Boer Hubert Chapuis Philippe gérardin christine gérardin-Charbonnier Universitéde Lorraine-Institut National de Recherche Pour l’Agriculture L’Alimentation et L’Environnement(INRAE)Laboratoire d’Etudes et de Recherche sur le Matériau Bois(LERMAB)NancyFrance

This study evaluated the methods of grafting commercial catechin with fatty acids,namely capric acid(C10),lauric acid(C12),and myristic acid(C14)through *** of beech wood(Fagus sylvatica L.)were impregnated with catechin and modified catechin-fatty acids,separately,at a 5%concentration diluted in ethanol using vacuum pressure treatment and subjected to *** weight percentage gain before leaching(WPg),after leaching(WPgAL),and weight loss due to leaching(PL)were *** leached and unleached samples were tested against white-rot fungi(Trametes versicolor)in Petri-dishes for twelve *** show that samples treated with modified catechin-fatty acids provide improved resistance towards ***-C14 was found to be more promising,possibly due to its chain *** decay weight loss for samples treated with modified catechin-fatty acids does not differ significantly between the samples that leached and *** the antifungal properties of catechin,the treatment with catechin alone was insufficient to protect wood samples from ***,it is recommended to increase the concentration level of modified catechin to obtain a significant effect on the decay resistance.

关键词： Antifungal catechin chemical modification fatty acids wood protection

Characterization of Extracts from the Bark of the gabon Hazel Tree (Coula edulis baill) for Antioxidant,Antifungal and Anti-termite Products

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Journal of Renewable Materials 2021年第1期9卷 17-33页

作者： Christ Stone Arnaud Bopenga Bopenga Henri Meyo Degboevi Kevin Candelier Prosper Edou Engonga Stéphane Dumarçay Marie France Thévenon christine gérardin Charbonnier Philippe gérardin Universitéde Lorraine Institut National de Recherche pour l’Agriculturel’Alimentation et l’EnvironnementLaboratoire d’Etudes et de Recherche sur le Matériau BoisNancyFrance Universitéde Montpellier Centre de Coopération Internationale en Recherche Agronomique pour le Développement-Research Unit BiomassWoodEnergyBioproductsMontpellierFrance Multidisciplinary Laboratory of Sciences of Libreville Normal Superior SchoolLibrevilleGabon

Chemical composition of the bark extracts of Coula edulis was investigated to find potential antioxidant,anti-termite and antifungal compounds which can find useful applications in the fields of food,nutraceuticals,cosmetics or *** screening revealed the presence of several groups of active molecules such as alkaloids,polyphenols,flavonoids,saponins and sterols and/or terpenes in the different *** phenols,condensed tannins and flavonoids contents corroborated phytochemical *** chromatographymass spectrometry(gC-MS)analysis revealed compounds in dichloromethane extract different from those obtained with all the other *** and trans-9-octadecenoic acids,as well as stigmasterol andβ-sitosterol have been identified as the major compounds in the dichloromethane *** obtained with acetone and toluene/ethanol mixture(2/1,v/v)indicated the presence of few amounts of fatty acids and sugars,catechin in small amount and huge amounts of phenolic acids like gallic and ellagic *** radical 2,2-diphenyl-1-picrylhydrazyle(DPPH)and the cationic radical 2,2’-azinobis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS+)were used for evaluation of antioxidant properties of the different *** dichloromethane extracts had a very low antioxidant activity,while acetone and toluene/ethanol extracts presented EC50 values similar to those of catechin and BHT used as reference antioxidant *** of the different extracts of the bark of *** on fungal growth inhibition indicated better inhibition of the mycelium growth of brown rot fungi compared to white rot *** anti-termite activities were recorded with the aqueous extracts,while stronger activities were recorded with dichloromethane,acetone and toluene/ethanol extracts.

关键词： Antifungal antioxidant anti-termite Coula edulis baill extracts valorisation

Use of a saline-coupled bipolar sealer open liver resection for hepatic malignancy: Medical resource use and costs

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World Journal of gastroenterology 2016年第46期22卷 10189-10197页

作者： christine I Nichols Joshua g Vose Medtronic Advanced Energy 180 Intemational Drive Portsmouth NH 03801 United States

AIM To evaluate outcomes associated with use of a saline coupled bipolar sealer during open partial liver *** This retrospective analysis utilized the United States Premier? insurance claims database(2010-2014). Patients were selected with codes for liver malignancy and partial hepatectomy or lobectomy. Cases were defined by use the saline-coupled bipolar sealer; controls had no use. A Propensity Score algorithm was used to match one case to five controls. A deviationbased cost modeling(DBCM) approach provided an estimate of *** One hundred and forty-four cases and 720 controls were available for analysis. Patients in the case cohort received fewer transfusions vs controls(18.1% vs 29.4%, P = 0.007). In DBCM, more patients in the case cohort experienced "on-course" hospitalizations(53.5% vs 41.9%, P = 0.009). The cost calculation showed an average savings in total hospitalization costs of $1027 for cases vs controls. In multivariate analysis, cases had lower odds of receiving a transfusion(OR = 0.44, 95%CI: 0.27-0.71, P = 0.0008).CONCLUSION Use of a saline-coupled bipolar sealer was associated with a greater proportion of patients with an "on course" hospitalization.

关键词： Liver resection hepatocellular carcinoma costs

Hypothesis that alpha-amylase evokes regulatory mechanisms originating in the pancreas,gut and circulation,which govern glucose/insulin homeostasis

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World Journal of Diabetes 2023年第9期14卷 1341-1348页

作者： Stefan g Pierzynowski christine Stier Kateryna Pierzynowska Department of Medical Biology Institute of Rural HealthLublin 20090Poland Department of Biology Lund UniversityLund 22362Sweden Anara AB Trelleborg 23132Sweden Department of general VisceralTransplantVascularand Pediatric Surgery and Division of EndocrinologyUniversity Hospital WürzburgWürzburg 97080Germany Department of Surgical Endoscopy Sana HospitalHuerth 50354Germany Department of Animal Physiology The Kielanowski Institute of Animal Physiology and NutritionJablonna 05110Poland Anagram Therapeutics IncFraminghamMA 01701United States

The anti-incretin theory involving the abolishment of diabetes type(DT)II by some of methods used in bariatric surgery,first appeared during the early years of the XXI century and considers the existence of anti-incretin ***,to date no exogenous or endogenous anti-incretins have been *** concept of the acini-islet-acinar axis assumes that insulin intra-pancreatically stimulates alpha-amylase synthesis(“halo phenomenon”)and in turn,alphaamylase reciprocally inhibits insulin production,thus making alpha-amylase a candidate for being an ***,gut as well as plasma alphaamylase,of pancreatic and other origins,inhibits the appearance of dietary glucose in the blood,lowering the glucose peak after iv or oral glucose *** effect of alpha-amylase can be interpreted as an insulin down regulatory mechanism,possibly limiting the depletion of pancreatic beta cells and preventing their *** observations agree with the above statements,where patients with high blood alpha-amylase concentrations are seldom obese and seldom develop ***-DT2,as well as DT1 patients,usually develop exocrine pancreatic insufficiency(EPI)and vice ***,DT2 patients develop DT1,when the pancreatic beta cells are exhausted and insulin production *** on biliopancreatic diversion(BPD)and on BPD with duodenal switch,a type of bariatric surgery,as well as studies on EPI pigs,allow us to observe and investigate the above-mentioned phenomena of intra-pancreatic interactions.

关键词： Pancreas Alpha-amylase Acini-islet-acinar axis Hyperglycaemia Bariatrics Insulin Incretins glucosedependent insulinotropic polypeptide glucagon-like peptide-1 Exocrine pancreatic insufficiency Pancreatic enzyme therapy Diabetes

TUNED MECHANICAL PROPERTIES ACHIEVED BY VARYINg POLYMER STRUCTURE-KNOWLEDgE THAT gENERATES NEW MATERIALS FOR TISSUE ENgINEERINg

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Chinese Journal of Polymer Science 2007年第2期25卷 113-118页

作者： Anna Finne Wistrand Ann-christine Albertsson Department of Fiber and Polymer Technology Royal Institute of TechnologyStockholmSweden

By changing both the monomer composition and the polymer structure, we have varied the mechanical properties of resorbable polymers. The polymers were synthesized by ring-opening polymerization using L-lactide （LLA）, ε-caprolactone （εCL）, trimethylene carbonate （TMC） and 1,5-dioxepan-2-one （DXO） as monomers. Well-defined triblock copolymers, microblock copolymers and networks have been evaluated, and comparisons between them show that it is possible to tune the mechanical properties. Triblock copolymers with an amorphous middle block of poly（1,5-dioxepan-2- one）（PDXO） and semi-crystalline end-blocks of poly（ε-caprolactone）（PCL） were stronger and had a higher strain at break than triblock copolymers with poly（L-lactide）（PLLA） as end-blocks. Polymers with both DXO and TMC in the amorphous middle-block and PLLA as end-blocks showed a lower stress at break, but the material gained elasticity, a property which is very valuable in tissue engineering. Mechanical properties of networks, synthesized by a novel method, containing PDXO and PCL are also presented. Although it is difficult to compare them with the uncross-linked polymers, this is an additional way to modify and widen the properties.

关键词： Degradable polymer Tuneable mechanical properties Molecular architecture Block copolymers Networks.

Link prediction in complex networks via modularity-based belief propagation

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Chinese Physics B 2017年第3期26卷 604-614页

作者：赖大荣舒欣 christine Nardini School of Computer Science and Engineering Southeast University Nanjing 211189 China Key Laboratory of Computer Network and Information Integration of Ministry of Education Southeast University Nanjing 210096 China College of Information Science and Technology Nanjing Agricultural University Nanjing 210095 China CNR-IAC 'Mauro Picone' Via dei Taurini 19 00185 Roma Italy Personalgenomics Via delle Grazie Verona Italy

Link prediction aims at detecting missing, spurious or evolving links in a network, based on the topological information and/or nodes＇ attributes of the network. Under the assumption that the likelihood of the existence of a link between two nodes can be captured by nodes＇ similarity, several methods have been proposed to compute similarity directly or indirectly, with information on node degree. However, correctly predicting links is also crucial in revealing the link formation mechanisms and thus in providing more accurate modeling for networks. We here propose a novel method to predict links by incorporating stochastic-block-model link generating mechanisms with node degree. The proposed method first recov- ers the underlying block structure of a network by modularity-based belief propagation, and based on the recovered block structural information it models the link likelihood between two nodes to match the degree sequence of the network. Experiments on a set of real-world networks and synthetic networks generated by stochastic block model show that our proposed method is effective in detecting missing, spurious or evolving links of networks that can be well modeled by a stochastic block model. This approach efficiently complements the toolbox for complex network analysis, offering a novel tool to model links in stochastic block model networks that are fundamental in the modeling of real world complex networks.

关键词： link prediction complex network belief propagation modularity