Bollmus, Susanne

[["dc.bibliographiccitation.firstpage","206"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","International Journal of Adhesion and Adhesives"],["dc.bibliographiccitation.lastpage","209"],["dc.bibliographiccitation.volume","29"],["dc.contributor.author","Dieste, Andres"],["dc.contributor.author","Krause, Andreas"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2018-11-07T08:32:12Z"],["dc.date.available","2018-11-07T08:32:12Z"],["dc.date.issued","2009"],["dc.description.abstract","The shear strength, the cohesive wood failure, and the delamination were determined in plywood constructed with veneers of Fagus sp., Betula sp., and Picea sp. impregnated with 0.8,1.3, and 2.3 M 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU). The plywood production process consisted of two steps: firstly impregnation and curing of the veneers, and secondly assembly of the panel. The adhesive used was a phenolic resin. The values obtained for shear strength were above the standard limit of rejection (1 N mm(-2)), and therefore the samples met the European requirements of plywood designed for exterior conditions. The phenolic resin improved its adhesive ability when the samples were heated for 72h at 95 degrees C. The highest shear strength for modified wood was 3.97 +/- .45 N mm(-2) at 0.8 M, 3.39 +/- 0.26 N mm(-2) at 1.3 M, and 2.35 +/- 0.23 N mm(-2) at 2.3 M, for Betula sp., Fagus sp., and Piceo sp., respectively. The samples constructed with unmodified veneers presented higher shear strengths and higher cohesive wood failures than the samples constructed with modified veneers. The possible effect of the two-steps production of the plywood is discussed. The delamination test of DMDHEU-modified Betula sp. and Fagus sp. plywood showed no open glue lines, while the samples of Picea sp. treated with the higher concentration of DMDHEU suffered delamination. (C) 2008 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.ijadhadh.2008.05.001"],["dc.identifier.isi","000262241800012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17280"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.issn","0143-7496"],["dc.title","Gluing ability of plywood produced with DMDHEU-modified veneers of Fagus sp., Betula sp., and Picea sp."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","22"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","International wood products journal"],["dc.bibliographiccitation.lastpage","27"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Behr, Georg"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Gellerich, Antje"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2020-12-10T18:15:31Z"],["dc.date.available","2020-12-10T18:15:31Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1080/20426445.2017.1416738"],["dc.identifier.eissn","2042-6453"],["dc.identifier.issn","2042-6445"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74872"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The influence of curing conditions on the properties of European beech ( Fagus sylvatica ) modified with melamine resin assessed by light microscopy and SEM-EDX"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","786"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Holzforschung"],["dc.bibliographiccitation.lastpage","797"],["dc.bibliographiccitation.volume","75"],["dc.contributor.author","Emmerich, Lukas"],["dc.contributor.author","Bleckmann, Maja"],["dc.contributor.author","Strohbusch, Sarah"],["dc.contributor.author","Brischke, Christian"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2021-10-01T09:58:15Z"],["dc.date.available","2021-10-01T09:58:15Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot ( Trametes versicolor ), brown rot ( Coniophora puteana ) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing."],["dc.description.abstract","Abstract Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot ( Trametes versicolor ), brown rot ( Coniophora puteana ) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing."],["dc.identifier.doi","10.1515/hf-2020-0252"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/90022"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-469"],["dc.relation.eissn","1437-434X"],["dc.relation.issn","0018-3830"],["dc.title","Growth behavior of wood-destroying fungi in chemically modified wood: wood degradation and translocation of nitrogen compounds"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","529"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Schlotzhauer, Philipp"],["dc.contributor.author","Kovryga, Andriy"],["dc.contributor.author","Emmerich, Lukas"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Van de Kuilen, Jan-Willem"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2019-07-09T11:51:57Z"],["dc.date.available","2019-07-09T11:51:57Z"],["dc.date.issued","2019"],["dc.description.abstract","Background and Objectives: In the near future, in Europe a raised availability of hardwoods is expected. One possible sales market is the building sector, where medium dense European hardwoods could be used as load bearing elements. For the hardwood species beech, oak, and sweet chestnut technical building approvals already allow the production of hardwood glulam. For the species maple and ash this is not possible yet. This paper aims to evaluate the economic feasibility of glulam production from low dimension ash and maple timber from thinnings. Therefore, round wood qualities and the resulting lumber qualities are assessed and final as well as intermediate yields are calculated. Materials and Methods: 81 maple logs and 79 ash logs cut from trees from thinning operations in mixed (beech) forest stands were visually graded, cant sawn, and turned into strength-graded glulam lamellas. The volume yield of each production step was calculated. Results: The highest volume yield losses occur during milling of round wood (around 50%) and “presorting and planning” the dried lumber (56–60%). Strength grading is another key process in the production process. When grading according to DIN 4074-5 (2008), another 40–50% volume loss is reported, while combined visual and machine grading only produces 7–15% rejects. Conclusions: Yield raise potentials were identified especially in the production steps milling, presorting and planning and strength grading."],["dc.identifier.doi","10.3390/f10070529"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16246"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60049"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","1999-4907"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","Analysis of Economic Feasibility of Ash and Maple Lamella Production for Glued Laminated Timber"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","932"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Holzforschung"],["dc.bibliographiccitation.lastpage","944"],["dc.bibliographiccitation.volume","75"],["dc.contributor.author","Emmerich, Lukas"],["dc.contributor.author","Brischke, Christian"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2021-12-01T09:24:00Z"],["dc.date.available","2021-12-01T09:24:00Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Cyclic N -methylol compounds have been used for cell wall impregnation modifications of wood. Besides an improved decay resistance and dimensional stability, the modifications resulted in a decrease of wood’s dynamic strength properties. However, the mechanisms behind a significant loss in dynamic strength are not fully understood yet. In this study, wood blocks were treated with the N -methylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU (mDMDHEU) and the N -methyl compound 1,3-dimethyl-4,5-dihydroxy-ethyleneurea (DMeDHEU). In order to study the factors that control the changes of wood performance under dynamic loads, single (impact bending strength, IBS) and multiple dynamic impact (resistance to impact milling, RIM) tests were applied. It became evident, that reductions in IBS and RIM increased with increasing solid content, formaldehyde content and catalyst concentration of the impregnation solutions, but were not affected by a cold-water leaching. Differences in structural integrity of wood modified with N -methylol and N -methyl compounds were more pronounced than those of IBS. Therefore, RIM appeared more sensitive to changes on cellular level, as a higher degree of co-condensation of the N -methylol compounds with cell wall polymers was expected in comparison with the N -methyl compound."],["dc.description.abstract","Abstract Cyclic N -methylol compounds have been used for cell wall impregnation modifications of wood. Besides an improved decay resistance and dimensional stability, the modifications resulted in a decrease of wood’s dynamic strength properties. However, the mechanisms behind a significant loss in dynamic strength are not fully understood yet. In this study, wood blocks were treated with the N -methylol compounds 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and methylated DMDHEU (mDMDHEU) and the N -methyl compound 1,3-dimethyl-4,5-dihydroxy-ethyleneurea (DMeDHEU). In order to study the factors that control the changes of wood performance under dynamic loads, single (impact bending strength, IBS) and multiple dynamic impact (resistance to impact milling, RIM) tests were applied. It became evident, that reductions in IBS and RIM increased with increasing solid content, formaldehyde content and catalyst concentration of the impregnation solutions, but were not affected by a cold-water leaching. Differences in structural integrity of wood modified with N -methylol and N -methyl compounds were more pronounced than those of IBS. Therefore, RIM appeared more sensitive to changes on cellular level, as a higher degree of co-condensation of the N -methylol compounds with cell wall polymers was expected in comparison with the N -methyl compound."],["dc.identifier.doi","10.1515/hf-2021-0013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/94821"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-478"],["dc.relation.eissn","1437-434X"],["dc.relation.issn","0018-3830"],["dc.title","Dynamic strength properties and structural integrity of wood modified with cyclic N -methylol and N -methyl compounds"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","262"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Wood Material Science and Engineering"],["dc.bibliographiccitation.lastpage","270"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Behr, Georg"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Gellerich, Antje"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2020-12-10T18:15:25Z"],["dc.date.available","2020-12-10T18:15:25Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1080/17480272.2017.1313313"],["dc.identifier.eissn","1748-0280"],["dc.identifier.issn","1748-0272"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74837"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Improvement of mechanical properties of thermally modified hardwood through melamine treatment"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","84"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Beeretz, Cara"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2020-12-10T18:47:04Z"],["dc.date.available","2020-12-10T18:47:04Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.3390/f11010084"],["dc.identifier.eissn","1999-4907"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17127"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78629"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","1999-4907"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Tensile and Impact Bending Properties of Chemically Modified Scots Pine"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","281"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","HOLZ ALS ROH-UND WERKSTOFF"],["dc.bibliographiccitation.lastpage","287"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Dieste, Andres"],["dc.contributor.author","Krause, Andreas"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2018-11-07T11:12:28Z"],["dc.date.available","2018-11-07T11:12:28Z"],["dc.date.issued","2008"],["dc.description.abstract","The dimensional stability and some mechanical properties were tested in plywood produced with veneers modified with 1.3-dimethylol-4.5-dihydroxyethyleneurea (DMDHEU). The experimental design included Betula sp. and Fagus sylvatica impregnated with 0.8 M, 1.3 M, and 2.3 M DMDHEU. The plywood consisted of five veneers glued with a phenolic resin. Dimensional stability tests were conducted after 10 cycles of soaking/oven-drying to determine volume changes and anti swelling efficiency (ASE). The mechanical properties tested were hardness (Brinell), modulus of elasticity in bending (MOE), bending strength (BS) and work to maximum load in bending (WMLB). The modified samples for both species were considerably more dimensionally stable than the untreated samples. The samples of Betula sp. and F. sylvatica modified with DMDHEU presented a MOE and a BS unaffected by the treatment. The WMLB was consistently lower in the modified samples than in the unmodified samples. As determined by the Brinell method, the DMDHEU-modified plywood of the Betula sp. and F. sylvatica was harder than the unmodified plywood."],["dc.identifier.doi","10.1007/s00107-008-0247-3"],["dc.identifier.isi","000258062600007"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3078"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53675"],["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","Physical and mechanical properties of plywood produced with 1.3-dimethylol-4.5-dihydroxyethyleneurea (DMDHEU)-modified veneers of Betula sp and Fagus sylvatica"],["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","3"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Wood Material Science & Engineering"],["dc.bibliographiccitation.lastpage","18"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Emmerich, Lukas"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2020-12-10T18:15:26Z"],["dc.date.available","2020-12-10T18:15:26Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1080/17480272.2017.1417907"],["dc.identifier.eissn","1748-0280"],["dc.identifier.issn","1748-0272"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74841"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Wood modification with DMDHEU (1.3-dimethylol-4.5-dihydroxyethyleneurea) – State of the art, recent research activities and future perspectives"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1263"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","European Journal of Wood and Wood Products"],["dc.bibliographiccitation.lastpage","1272"],["dc.bibliographiccitation.volume","76"],["dc.contributor.author","Behr, Georg"],["dc.contributor.author","Gellerich, Antje"],["dc.contributor.author","Bollmus, Susanne"],["dc.contributor.author","Brinker, Sascha"],["dc.contributor.author","Militz, Holger"],["dc.date.accessioned","2020-12-10T14:08:20Z"],["dc.date.available","2020-12-10T14:08:20Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1007/s00107-018-1290-3"],["dc.identifier.eissn","1436-736X"],["dc.identifier.issn","0018-3768"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70429"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The influence of curing conditions on properties of melamine modified wood"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]