Roffael, Edmone

[["dc.bibliographiccitation.firstpage","189"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","191"],["dc.bibliographiccitation.volume","64"],["dc.contributor.author","Hennecke, U."],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Dix, Brigitte"],["dc.date.accessioned","2018-11-07T09:45:07Z"],["dc.date.available","2018-11-07T09:45:07Z"],["dc.date.issued","2006"],["dc.description.abstract","Wood and wood-based panels emanate formic and acetic acid. The amount of acetic acid release is high in comparison to its concentration in cold water extracts of wood-based panels containing both formic and acetic acids. This is most probably due to the fact that formic acid is a stronger acid (pK(a) 3.77) than acetic acid (pK(a) 4.76). Insofar the dissociation of acetic acid is suppressed by the presence of formic acid and the undissociated acetic acid emanates in higher amounts than formic acid in the vapour phase."],["dc.identifier.doi","10.1007/s00107-005-0030-7"],["dc.identifier.isi","000238678100005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34546"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","To the release of volatile acids from medium density fibreboards (MDF)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","73"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","74"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Kraft, R."],["dc.date.accessioned","2018-11-07T10:41:18Z"],["dc.date.available","2018-11-07T10:41:18Z"],["dc.date.issued","2003"],["dc.description.abstract","Extractable urea was determined in water extractives of medium density fiberboards (MDF), prepared using the blowline- and blender-technique. The results reveal: higher amounts of urea are extractable from boards resinated in the blowline than in the blender. Therefore, it seems that less cross-linking of the resin takes place in the blowline than in the blender."],["dc.identifier.doi","10.1007/s00107-002-0355-4"],["dc.identifier.isi","000181662400011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46504"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Extractable urea in MDF prepared using the blowfine- and blender-technique"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","165"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","166"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Dix, Brigitte"],["dc.date.accessioned","2018-11-07T11:11:07Z"],["dc.date.available","2018-11-07T11:11:07Z"],["dc.date.issued","2005"],["dc.identifier.doi","10.1007/s00107-004-0563-1"],["dc.identifier.isi","000228315200012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53359"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Methods for the microscopic indirect detection of paraffins from fibers"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","129"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","134"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Hennecke, U."],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Schneider, T."],["dc.date.accessioned","2018-11-07T11:11:04Z"],["dc.date.available","2018-11-07T11:11:04Z"],["dc.date.issued","2005"],["dc.description.abstract","Thermomechanical pulps from beech were in part washed by water at room temperature to remove water soluble components. MDF bonded with acid curing UF-resin and alkaline curing TF-resin were prepared from unwashed and washed fibres under exactly the same conditions on using the same binder. The equilibrium moisture contents (EMC) of pulps and from MDF were measured. The EMC of pulps was lower than that of the chips used for pulping. Washing of pulps leads to further decrease in the EMC. The EMC of the MDF bonded by alkaline curing TF-resin was higher than that of the fibres. In contrast, UF-bonded MDF had lower EMC than wood fibres. In general, the EMC of MDF produced from washed fibres were higher than that of the MDF produced from unwashed fibres. The UF-MDF has lower EMC than that of TF-MDF. The pH-value of the MDF made from washed fibres was higher than that of the MDF produced from unwashed fibres. The pH-value of UF-MDF is lower than the pH-value of the TF-MDF. The transverse tensile strength of UF-MDF produced from washed fibres were lower than that of the MDF made from unwashed fibres. In contrast, the transverse tensile strength of TF-MDF prepared from washed fibres was higher than from unwashed fibres. The difference in behaviour of unwashed and washed fibres is probably, at least partially, due to the influence of washing on the pH-value of fibres and the different interaction between the fibres and the used resin systems."],["dc.identifier.doi","10.1007/s00107-004-0552-4"],["dc.identifier.isi","000228315200007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53348"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","On the impact of water soluble wood components on the fibre-to-fibre bonds in MDF"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","229"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","234"],["dc.bibliographiccitation.volume","77"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Behn, C."],["dc.contributor.author","Windeisen-Holzhauser, E."],["dc.contributor.author","Roffael, E."],["dc.date.accessioned","2020-12-10T14:08:21Z"],["dc.date.available","2020-12-10T14:08:21Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00107-018-1380-2"],["dc.identifier.eissn","1436-736X"],["dc.identifier.issn","0018-3768"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70431"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Influence of thermo-mechanical and chemo-thermo-mechanical pulping on the properties of oak fibres"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","46"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","47"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Hennecke, U."],["dc.contributor.author","Schneider, T."],["dc.date.accessioned","2018-11-07T10:41:18Z"],["dc.date.available","2018-11-07T10:41:18Z"],["dc.date.issued","2003"],["dc.description.abstract","Colour measurements in the visible region using a scale of Datacolor showed that beech veneer treated with boiling water discolours significantly less under the action of light than untreated veneer. The change in colour value of the treated wood containing red heartwood was only half of the one in the corresponding untreated wood. In wood without red heartwood, the colour change induced by the ultraviolet radiation could even be reduced to a fifth of that of the not treated veneer. Therefore, the pretreatment with boiling water seems to be a suitable method to reduce significantly the discolouration caused by exposure to light. Treatment with boiling water also results in veneers with homogenous colour distribution."],["dc.identifier.doi","10.1007/s00107-002-0354-5"],["dc.identifier.isi","000181662400007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46503"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Improvement of discolouration resistance of beech veneers against light by treatment with hot water"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","397"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","399"],["dc.bibliographiccitation.volume","76"],["dc.contributor.author","Roffael, E."],["dc.contributor.author","Gabriel, M."],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Behn, C."],["dc.date.accessioned","2020-12-10T14:08:19Z"],["dc.date.available","2020-12-10T14:08:19Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s00107-017-1231-6"],["dc.identifier.eissn","1436-736X"],["dc.identifier.issn","0018-3768"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70422"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Influence of pulping technology on the release of formaldehyde and volatile organic acids from oak fibres and medium density fibreboards (MDF) prepared therefrom"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","123"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","124"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Dix, Brigitte"],["dc.date.accessioned","2018-11-07T10:47:31Z"],["dc.date.available","2018-11-07T10:47:31Z"],["dc.date.issued","2000"],["dc.description.abstract","Subject Thermo-mechanical pulps (TMP) and chemo-thermo-mechanical pulps (CTMP) were made from spruce under different pulping conditions. The fibres were dried at 70 degrees C. Medium density fibreboards (MDF) were made in pilot plant scale from the pulps using urea-formaldehyde resin as a binder. The results of testing the physical properties reveal, that the pulping temperature has a significant influence on the thickness swelling and water absorption of the boards. MDF from fibres produced at high pulping temperature (180 degrees C) generally show lower thickness swelling and water absorption than MDF made from fibres produced at lower pulping temperature (140 degrees C and 160 degrees C)."],["dc.identifier.doi","10.1007/s001070050398"],["dc.identifier.isi","000088243700021"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/47985"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Influence of pulping methods (thermomechanical, chemothermomechanical) and pulping conditions on physical and technical properties of medium-density fibreboards"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","469"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","470"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Schneider, T."],["dc.date.accessioned","2018-11-07T10:34:20Z"],["dc.date.available","2018-11-07T10:34:20Z"],["dc.date.issued","2003"],["dc.description.abstract","The influence of chain length and amount of paraffins on the thickness swelling, water absorption and internal bond of MDF was assessed. Pronounced differences in the sizing efficiency of paraffins with different chain length were found. On using 0.1% paraffin ( based on dried fibres) sizing efficiency increases between C-20 and C-28. Higher paraffin content (> 0.25%) has an insignificant influence on the swelling behaviour of MDF. Preliminary results indicate that addition of 0.5... 1.0% of the tested paraffins seems to improve the internal bonding strength of the MDF."],["dc.identifier.doi","10.1007/s00107-003-0420-7"],["dc.identifier.isi","000187288800015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/44845"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Paraffins of different chain length as swelling agents in medium-density fiberboards"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.subtype","letter_note"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","192"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","203"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Schneider, T."],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Buchholz, T."],["dc.date.accessioned","2018-11-07T10:38:58Z"],["dc.date.available","2018-11-07T10:38:58Z"],["dc.date.issued","2005"],["dc.description.abstract","The main objective of the conducted research work was to explore the influence of chain length and amount of n-paraffins as well as the chemical composition of technical paraffins (chain length and amount of n- and iso-alkanes) on the thickness swelling, water absorption and internal bond strength of MDF. Pronounced differences in the sizing efficiency of n-paraffins with different chain length (C-20, C-28, C-36) were found. On using 0.1% paraffin (based on dried fibers) sizing efficiency increases between C20 and C28. Higher paraffin content (> 0.25%) has an insignificant influence on the swelling behaviour of MDF. In the range between 0.1% and 1.0% (solid based on dry fibers) paraffin has no negative impact on the physical-mechanical properties of the boards. The influence of paraffin chain length on the equilibrium moisture content (EMC) seems to be negligible. Further investigations were carried out using technical paraffins with different chemical composition (chain length and amount of n- and iso-alkanes) as a sizing agent for MDF. The results show that technical paraffins with a high content of long-chain-n-alkanes are more effective sizing agents than technical paraffins with low-chain-n-alkanes. Moreover, the type of used emulsifier (anionic, cationic) was also investigated. Anionic and cationic emulsifiers were equivalent in their sizing effect."],["dc.identifier.doi","10.1007/s00107-004-0556-0"],["dc.identifier.isi","000230310400005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45934"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","On paraffin sizing of medium density fiberboards (MDF). Part 1: Influence of the chemical composition of paraffin and type of emulsifier on the hydrophobic properties of MDF"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]