Kharazipour, Alireza

[["dc.bibliographiccitation.firstpage","387"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Microbiology and Biotechnology"],["dc.bibliographiccitation.lastpage","394"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Huttermann, A."],["dc.contributor.author","Mai, Carsten"],["dc.contributor.author","Kharazipour, Alireza"],["dc.date.accessioned","2018-11-07T09:05:17Z"],["dc.date.available","2018-11-07T09:05:17Z"],["dc.date.issued","2001"],["dc.description.abstract","The cell walls of woody plants are compound ed materials made by in situ polymerization of a polyphenolic matrix (lignin) into a web of fibers (cellulose), a process that is catalysed by polyphenoloxidases (laccases) or peroxidases. The first attempt to transform the basic strategy of this natural process for use in human craftsmanship was the ancient lacquer method. The sap of the lacquer tree (Rhus verniciflua) contains large amounts of a phenol (urushiol), a polysaccharide and the enzyme laccase. This oil-in-water emulsion solidifies in the presence of oxygen. The Chinese began using this phenomenon for the production of highly creative artwork more than 6,000 years ago. It was the first example of an isolated enzyme being used as a catalyst to create an artificial plastic compound. In order to apply this process to the production of products on an industrial scale, an inexpensive phenol must be used, which is transferred by an enzyme to active radicals that react with different components to form a compounded material. At present, the following approaches have been studied: (1) In situ polymerization of lignin for the production of particle boards. Adhesive cure is based on the oxidative polymerization of lignin using phenoloxidases (laccase) as radical donors. This lignin-based bio-adhesive can be applied under conventional pressing conditions. The resulting particle boards meet German performance standards. By this process, 80% of the petrochemical binders in the wood-composite industry can be replaced by materials from renewable resources. (2) Enzymatic copolymerization of lignin and alkenes. In the presence of organic hydroperoxides, laccase catalyses the reaction between lignin and olefins. Derailed studies on the reaction between lignin and acrylate monomers showed that chemo-enzymatic copolymerization offers the possibility to produce defined lignin-acrylate copolymers. The system allows control of the molecular weights of the products in a way that has not been possible with chemical catalysts. This is a novel attempt to enzymatically induce grafting of polymeric side chains onto the lignin backbone, and it enables the utilization of lignin as part of new engineering materials. (3) Enzymatic activation of the middle-lamella lignin of wood fibers for the production of wood composites. The incubation of wood fibers with a phenol oxidizing enzyme results in oxidative activation of the lignin crust on the fiber surface. When such fibers are pressed together, boards are obtained which meet the German standards for medium-density fiber boards (MDF). The fibers are bound together in a way that comes close to that by which wood fibers are bound together in naturally grown wood. This process will, for the first time, yield wood composites that are produced solely from naturally grown products without any addition of resins."],["dc.identifier.isi","000168842900001"],["dc.identifier.pmid","11398916"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25281"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-0614"],["dc.relation.issn","0175-7598"],["dc.title","Modification of lignin for the production of new compounded materials"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","532"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Wood and Fiber Science"],["dc.bibliographiccitation.lastpage","543"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Müller, Günter"],["dc.contributor.author","Bartholme, Michael"],["dc.contributor.author","Kharazipour, Alireza"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:55Z"],["dc.date.available","2017-09-07T11:49:55Z"],["dc.date.issued","2008"],["dc.description.abstract","Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy was applied to trace changes in chemical fiber properties during the production process of insulating fiber mats. In combination with cluster analysis, FTIR spectra were used to interpret the homogeneity of the products. Beech wood (Fagus sylvatica L.) was used as a novel sustainable material for fiberboard production. The insulating fiberboards were either processed without binder or with potato pulp or potato starch as renewable binders and dried in a dryer or a microwave. FTIR spectral analyses revealed chemical modifications at the O-H association band of carbohydrates that distinguished the two different drying methods. Additions of plant-based renewable binders diminished the absorbance of the resulting products at characteristic wavenumbers in the IR. These decreases were closely correlated with the amount of added binder and thus have the potential to quantify binder additions to the fiberboards. Cluster analysis grouped FTIR spectra of samples from different production steps or processes correctly and therefore is an effective and simple technique for quality control of insulating fiberboards from renewable resources."],["dc.identifier.gro","3149765"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6462"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.title","FTIR-ATR spectroscopic analysis of changes in fiber properties during insulating fiberboard manufacture of beech wood"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","49"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Bioresources"],["dc.bibliographiccitation.lastpage","71"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Müller, G."],["dc.contributor.author","Schöpper, C."],["dc.contributor.author","Vos, H."],["dc.contributor.author","Kharazipour, Alireza"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:56Z"],["dc.date.available","2017-09-07T11:49:56Z"],["dc.date.issued","2008"],["dc.identifier.gro","3149769"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6467"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.title","FTIR-ATR spectroscopic analyses of changes in wood properties during particle- and fiberboard production of hard- and softwood trees"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","297"],["dc.bibliographiccitation.lastpage","346"],["dc.contributor.author","Kloeser, L."],["dc.contributor.author","Kües, Ursula"],["dc.contributor.author","Schöpper, C."],["dc.contributor.author","Hosseinkhani, H."],["dc.contributor.author","Schütze, S."],["dc.contributor.author","Dantz, S."],["dc.contributor.author","Malik, I."],["dc.contributor.author","Vos, H."],["dc.contributor.author","Bartholme, M."],["dc.contributor.author","Müller, C."],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Kharazipour, Alireza"],["dc.contributor.editor","Kües, Ursula"],["dc.date.accessioned","2017-09-07T11:49:55Z"],["dc.date.available","2017-09-07T11:49:55Z"],["dc.date.issued","2007"],["dc.identifier.gro","3149760"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6457"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.publisher","Georg-August-Universität Göttingen"],["dc.publisher.place","Göttingen"],["dc.relation.isbn","978-3-940344-11-3"],["dc.relation.ispartof","Wood Production, Wood Technology, and Biotechnological Impacts"],["dc.title","Boards and Conventional Adhesives"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","699"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Wood Science and Technology"],["dc.bibliographiccitation.lastpage","708"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Euring, Markus"],["dc.contributor.author","Trojanowski, Jerzy"],["dc.contributor.author","Horstmann, Marina"],["dc.contributor.author","Kharazipour, Alireza"],["dc.date.accessioned","2018-11-07T09:08:55Z"],["dc.date.available","2018-11-07T09:08:55Z"],["dc.date.issued","2012"],["dc.description.abstract","In this work, the results of the enzymatic oxidation of TMP-fibers (thermomechanical pulp) and a well-structured lignin model compound, the dehydropolymer (DHP), were investigated by different C-14 and C-13 methods, caused by a Laccase-Mediator-System (LMS). These methods are the nuclear magnetic resonance spectroscopy (C-13-NMR) with DHP (unmarked) and the determination of the (CO2)-C-14 release of C-14-marked DHP and TMP-fibers. The C-13-NMR measurements were chosen to analyze the structural changes of the LMS-treated DHP model compounds and TMP-fibers qualitatively and quantitatively. The data of (CO2)-C-14 release give an explanation of the demethylation of DHP and TMP-fibers. The effect of the LMS is shown by comparing the results in respect of DHP and TMP-fibers, which were only treated with laccase and of an inactivated LMS as the control. Comparing the results of the C-13-NMR method, in particular the use of the Mediator during the enzymatical treatment, showed significant changes in the structure of the DHP. Also, the TMP-fibers were materially influenced by the LMS. The analysis of the (CO2)-C-14 release data of the C-14-marked DHP and TMP-fibers revealed that the rate of (CO2)-C-14 increases in the C-14-2 atom as well as in the (OCH3)-C-14 group within the first hour of Laccase-Mediator incubation. Therefore, the (CO2)-C-14 release from the DHP was higher than from the TMP-fibers."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [EU 124/2-1]"],["dc.identifier.doi","10.1007/s00226-011-0439-6"],["dc.identifier.isi","000305135000009"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8083"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26143"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0043-7719"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Studies of enzymatic oxidation of TMP-fibers and lignin model compounds by a Laccase-Mediator-System using different C-14 and C-13 techniques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Materials Science Research"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Nikvash, Neda"],["dc.contributor.author","Euring, Markus"],["dc.contributor.author","Kharazipour, Alireza"],["dc.date.accessioned","2019-07-09T11:40:22Z"],["dc.date.available","2019-07-09T11:40:22Z"],["dc.date.issued","2013"],["dc.description.abstract","This work was focused on the production and characterization of lightweight and water resistance particle boards with various lignocellulosic materials of the annual plants hemp (Cannabis sativa L.), canola (Brassica napus L.) and bagasse (Saccharum officinarum L.) in admixtures with industrial wood. Some chemical properties of these annual plants were investigated to find out their chemical characteristics in wood composites production. In all board variants 100% of the middle layers consisted of chips from one of the above annual plants. Reference boards were 100% beech wood. Laboratory manufacturing treatments included two panel density levels (500 and 600 kg/m3) and three resin types (urea-formaldehyde, melamine-urea-formaldehyde and wheat protein). Water absorption and thickness swelling of the laboratory manufactured boards were improved by adding melamine to urea-formaldehyde resin and by adding water repellent chemicals. The mechanical properties of the boards produced met the requirement for the general purpose product standards (EN 312-2) at both 500- and 600- kg/m3 densities. Decreasing the density, negatively affected the bending (modulus of rupture) and internal bond properties of canola boards. This decreasing trend was also observed for modulus of rupture values in bagasse boards of 500 kg/m3 density. Based on the results of the chemical analysis, it might be concluded that high values of ash content and lower values of hemicellulose and lignin content caused low physical properties and/or high water absorption of canola boards. The findings indicated that hemp and bagasse are valuable renewable natural resources for particleboard production and could be utilized as a substitute for wood in board production. In comparison with the reference boards, mixed variants boards showed surprisingly good results and generally conformed to European standards (EN 312-2) values."],["dc.identifier.doi","10.5539/jmsr.v2n2p126"],["dc.identifier.fs","592005"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10999"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58159"],["dc.language.iso","en"],["dc.relation.issn","1927-0593"],["dc.rights.access","openAccess"],["dc.title","Use of MUF Resin for Improving the Wheat Protein Binder in Particle Boards Made from Agricultural Residues"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","65"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Holzforschung"],["dc.bibliographiccitation.lastpage","70"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Burnett, Moira P."],["dc.contributor.author","Kharazipour, Alireza"],["dc.date.accessioned","2020-12-10T18:42:21Z"],["dc.date.available","2020-12-10T18:42:21Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1515/hf-2017-0028"],["dc.identifier.eissn","1437-434X"],["dc.identifier.issn","0018-3830"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77904"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Mechanical behaviour of a lightweight, three-layered sandwich panel based on the raw material maize"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6613"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","BioResources"],["dc.bibliographiccitation.lastpage","6624"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Euring, Markus"],["dc.contributor.author","Kirsch, Alexander"],["dc.contributor.author","Kharazipour, Alireza"],["dc.date.accessioned","2018-11-07T10:10:22Z"],["dc.date.available","2018-11-07T10:10:22Z"],["dc.date.issued","2016"],["dc.description.abstract","The hot-air/hot-steam process was used for the first time as a combined pre-pressing and pre-heating system for the production of medium-density fiberboards (MDF) at the pilot scale. Pre-heating systems are designed to pre-heat fiber mats before pressing by hot-presses. Using such techniques, pressing times are reduced significantly and the board properties are influenced positively; both are essential for effective MDF production. In recent years, industry has searched for alternatives to petrochemical binders. Primarily, MDF are bonded by urea-formaldehyde (UF) resins in Europe. To replace UF resins, a laccase-mediator-system (LMS) was used to activate the wood fibers' self-cohesion. It was found that the internal bond strength (IB) and thickness swelling (TS) were noticeably improved by applying the hot-air/hot-steam process before final hot-pressing for both LMS and 10% UF binding systems. Simultaneously, the total pressing time could be reduced by 25% when combining the hot-air/hot-steam process with hot-pressing."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [EU 124/2-2]"],["dc.identifier.doi","10.15376/biores.11.3.6613-6624"],["dc.identifier.isi","000384922400076"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39843"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","North Carolina State Univ Dept Wood & Paper Sci"],["dc.relation.issn","1930-2126"],["dc.title","Pre-pressing and Pre-heating via Hot-Air/Hot-Steam Process for the Production of Binderless Medium-Density Fiberboards"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","323"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","327"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Nikvash, Neda"],["dc.contributor.author","Kraft, Redelf"],["dc.contributor.author","Kharazipour, Alireza"],["dc.contributor.author","Euring, Markus"],["dc.date.accessioned","2018-11-07T08:40:46Z"],["dc.date.available","2018-11-07T08:40:46Z"],["dc.date.issued","2010"],["dc.description.abstract","Residues of Bagasse (Saccharum officinarum L.), canola (Brassica napus L.) and hemp (Cannabis sativa L.) as well as industrial wood chips in various proportions from 0-100% were used as raw materials for the main component of the middle layer in urea formaldehyde bonded particle boards. The results reveal that most of the investigated mechanical-technological properties of the boards achieved the requirements of EN 312-2 (2003). Only increasing the percentage of canola chips usage in the middle layer to more than 30% negatively affect the internal bond (IB) properties. Comparing the water absorption (WA) and thickness swelling (TS) values, the boards containing up to 50% bagasse and hemp reach similar values to the ones of the reference boards, while increasing the amount of canola leads to more and more disadvantageous WA and TS. In summary, the results reveal that agri-fibers can be used for making composite panels conforming to the standards (EN 312-2 2003). One possible application for these panels could be the production of furniture."],["dc.identifier.doi","10.1007/s00107-010-0465-3"],["dc.identifier.isi","000281072200009"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/4967"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19308"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Comparative properties of bagasse, canola and hemp particle boards"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","539"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","The Science of Nature"],["dc.bibliographiccitation.lastpage","541"],["dc.bibliographiccitation.volume","87"],["dc.contributor.author","Huttermann, A."],["dc.contributor.author","Majcherczyk, Andrzej"],["dc.contributor.author","Braun-Lullemann, A."],["dc.contributor.author","Mai, Carsten"],["dc.contributor.author","Fastenrath, M."],["dc.contributor.author","Kharazipour, Alireza"],["dc.contributor.author","Huttermann, J."],["dc.contributor.author","Huttermann, A. H."],["dc.date.accessioned","2018-11-07T10:52:56Z"],["dc.date.available","2018-11-07T10:52:56Z"],["dc.date.issued","2000"],["dc.identifier.doi","10.1007/s001140050774"],["dc.identifier.isi","000166057700005"],["dc.identifier.pmid","11198194"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49232"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0028-1042"],["dc.title","Enzymatic activation of lignin leads to an unexpected copolymerization with carbohydrates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]