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","151"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","152"],["dc.bibliographiccitation.volume","62"],["dc.contributor.author","Hennecke, U."],["dc.contributor.author","Roffael, Edmone"],["dc.date.accessioned","2018-11-07T10:49:55Z"],["dc.date.available","2018-11-07T10:49:55Z"],["dc.date.issued","2004"],["dc.identifier.doi","10.1007/s00107-003-0451-0"],["dc.identifier.isi","000221222900013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48539"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Formaldehyde release by middle-density fiberboard under hydrolytic conditions"],["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.issue","5"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Hameed, M."],["dc.contributor.author","Roffael, Edmone"],["dc.date.accessioned","2018-11-07T10:39:21Z"],["dc.date.available","2018-11-07T10:39:21Z"],["dc.date.issued","2000"],["dc.format.extent","306"],["dc.identifier.doi","10.1007/s001070050433"],["dc.identifier.isi","000166051100003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46025"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Preliminary research on the influence of anatomical wood section on gluability of sapwood and heartwood from pine (Pinus sylvestris L.)"],["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","1025"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","1026"],["dc.bibliographiccitation.volume","75"],["dc.contributor.author","Roffael, Edmone"],["dc.date.accessioned","2020-12-10T14:08:18Z"],["dc.date.available","2020-12-10T14:08:18Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s00107-017-1213-8"],["dc.identifier.eissn","1436-736X"],["dc.identifier.issn","0018-3768"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70420"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Release of acetic acid and formaldehyde from particleboards bonded with phenolic resins"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","299"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","300"],["dc.bibliographiccitation.volume","59"],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Schafer, M."],["dc.contributor.author","Roffael, Edmone"],["dc.date.accessioned","2018-11-07T08:48:43Z"],["dc.date.available","2018-11-07T08:48:43Z"],["dc.date.issued","2001"],["dc.description.abstract","Subject Chemo-thermo-mechanical pulps (CTMP) were made from waste particle- and fibreboards. Medium density fiberboards (MDF) were made from industrial refiner fibers in combination with the CTMP using urea-formaldehyde resin as a binder. The physical properties and the formaldehyde content of the MDF were determined. The results reveal that MDF made from CTMP of waste particle- and fibreboards meet the standards according to EN 622-5, type MDF. The bending strength and internal bond of MDF made from industrial TMP is higher compared with MDF from chemo-thermo-mechanical pulps from waste panels. However, the thickness swelling of MDF made from pulps derived from waste panels is clearly lower compared with that of MDF made from industrial TMP. Furthermore, MDF made from pulps derived from waste panels show a lower formaldehyde content than MDF from virgin fibers. It seems that residues of chemicals from the pulping process (CTMP) act as a formaldehyde scavanger."],["dc.identifier.doi","10.1007/s001070100211"],["dc.identifier.isi","000170529900014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21286"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Use of fiber material from chemothermomechanically processed waste particleboard and fiberboard"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","301"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","305"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Okum, J."],["dc.date.accessioned","2018-11-07T10:38:50Z"],["dc.date.available","2018-11-07T10:38:50Z"],["dc.date.issued","2000"],["dc.description.abstract","In the recent past, increasing attention has been paid to the use of natural adhesives as a binder in the wood-based panel industry. Nowadays, two German companies are using Quebracho tannin and Wattle tannin for the production of particleboards and medium density fiberboards (MDF), respectively. To date no serious attention has been given to bond fiberboards using tannin derived from spruce bark. Results of research work on the use of spruce tannin as a binder for medium density fiberboards carried out in the last two years are presented. The results reveal that spruce tannin can be used to partially substitute Quebracho tannin in MDF up to about 60%. Such boards still meet the specification of moisture resistant MDF (according to EN 319 and EN 321). Moreover, spruce tannin can be used to 100% as a binder for the production of MDF for indoor use (type MDF EN 622-5)."],["dc.identifier.doi","10.1007/s001070050432"],["dc.identifier.isi","000166051100002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45904"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Use of spruce tannin as a binder in particleboards and medium density fiberboards (MDF)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","841"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","842"],["dc.bibliographiccitation.volume","75"],["dc.contributor.author","Roffael, E."],["dc.date.accessioned","2020-12-10T14:08:17Z"],["dc.date.available","2020-12-10T14:08:17Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s00107-017-1169-8"],["dc.identifier.eissn","1436-736X"],["dc.identifier.issn","0018-3768"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70417"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Influence of washing chemo-thermo-mechanical pulps (CTMP) on the emission of volatile organic acids of medium density fibreboards (MDF) prepared therefrom"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","145"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","148"],["dc.bibliographiccitation.volume","65"],["dc.contributor.author","Roffael, Edmone"],["dc.contributor.author","Dix, Brigitte"],["dc.contributor.author","Schneider, Thomas"],["dc.date.accessioned","2018-11-07T11:03:30Z"],["dc.date.available","2018-11-07T11:03:30Z"],["dc.date.issued","2007"],["dc.description.abstract","Cold water extracts from pulps produced by the chemo-thermomechanical technique (CTMP process) contain higher amounts of formate and acetate ions compared to cold water extracts from pulps produced by the thermo-mechanical process (TMP process). The CTMP shows a higher emission of acetic acid than the corresponding TMP. However, the release of formic acid is lower than that from TMP due to the higher pH-value of CTMP. Furthermore, the release of formaldehyde from CTMP is lower than that from TMP due to Cannizzaro reaction catalysed by alkali. Moreover, binderless fibreboards from CTMP are significantly lower in the formaldehyde release compared to binderless boards from TMP. The use of MUF-resin increases the formaldehyde release of the boards from TMP and CTMP. Furthermore, MUF-bonded boards from TMP and CTMP are of higher pH-value and lower emission of formic and acetic acid."],["dc.identifier.doi","10.1007/s00107-006-0141-9"],["dc.identifier.isi","000245377300008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51636"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0018-3768"],["dc.title","Influence of pulping process on the emission of formaldehyde and volatile organic acids from pulps and 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","1589"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Microbiology and Biotechnology"],["dc.bibliographiccitation.lastpage","1596"],["dc.bibliographiccitation.volume","100"],["dc.contributor.author","Roffael, Edmone"],["dc.date.accessioned","2018-11-07T10:18:47Z"],["dc.date.available","2018-11-07T10:18:47Z"],["dc.date.issued","2016"],["dc.description.abstract","Wood contains primary extractives, which are present in all woods, and secondary extractives, which are confined in certain wood species. Extractives in wood play a major role in wood-bonding processes, as they can contribute to or determine the bonding relevant properties of wood such as acidity and wettability. Therefore, extractives play an immanent role in bonding of wood chips and wood fibres with common synthetic adhesives such as urea-formaldehyde-resins (UF-resins) and phenol-formaldehyde-resins (PF-resins). Extractives of high acidity accelerate the curing of acid curing UF-resins and decelerate bonding with alkaline hardening PF-resins. Water-soluble extractives like free sugars are detrimental for bonding of wood with cement. Polyphenolic extractives (tannins) can be used as a binder in the wood-based industry. Additionally, extractives in wood can react with formaldehyde and reduce the formaldehyde emission of wood-based panels. Moreover, some wood extractives are volatile organic compounds (VOC) and insofar also relevant to the emission of VOC from wood and wood-based panels."],["dc.identifier.doi","10.1007/s00253-015-7207-8"],["dc.identifier.isi","000369309000005"],["dc.identifier.pmid","26685670"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41520"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-0614"],["dc.relation.issn","0175-7598"],["dc.title","Significance of wood extractives for wood bonding"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]