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State of Degradation in Archeological Oak from the 17th

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Wood Conservation - Nautical Archaeology Program

Fresh oak shrinks 4 percent radially and 8 percent tangentially when air dried after cutting,while waterlogged oak can shrink 12 percent radially and ca.24 percent tangentially.Proper conservation treatments can control the amount of shrinkage experienced by waterlogged wood during drying.Warning on deterioration of famous Swedish warship,Vasalargely made of oak.They report that at its worst, Archeological Oak from the 17th Century Vasa 2000,and extensive holocellulose degradation was reported at numerous locations in the Transverse mechanical behaviour and moisture absorption of May 01,2007 State of Degradation in Archeological Oak from the 17th#0183;Based on moisture absorption data,it is possible to develop an understanding of the presence of PEG and the state of degradation of oak planks.Schniewind (1990) reviewed the physical and mechanical properties of several types of archaeological wood and found that,in general,ancient waterlogged wood absorbs more moisture than recent oak

To be and to continue being a cog the conservation of the

1 Diego Tamburini,Jeannette Jacqueline ucejko,Benedetto Pizzo,Mahmoud Youssif Mohammed,Robyn Sloggett,Maria Perla Colombini,A critical evaluation of the degradation state of dry archaeological wood from Egypt by SEM,ATR-FTIR,wet chemical analysis and Py(HMDS)-GC-MS,Polymer Degradation and Stability,2017,146,140CrossRefTo be and to continue being a cog the conservation of the 1 Diego Tamburini,Jeannette Jacqueline ucejko,Benedetto Pizzo,Mahmoud Youssif Mohammed,Robyn Sloggett,Maria Perla Colombini,A critical evaluation of the degradation state of dry archaeological wood from Egypt by SEM,ATR-FTIR,wet chemical analysis and Py(HMDS)-GC-MS,Polymer Degradation and Stability,2017,146,140CrossRefThe influence of chemical degradation and polyethylene The influence of chemical degradation and polyethylene glycol on moisture-dependent cell wall properties of archeological wooden objects a case study of the Vasa shipwreck.Wood Science and Technology,Sep 2016

The influence of chemical degradation and polyethylene

Sep 15,2016 State of Degradation in Archeological Oak from the 17th#0183;Cell wall measures allow for direct assessment of wood modification without the adverse effect of varying density and microstructure.In this study,cell wall properties of recent and archeological oak wood from the Vasa shipwreck were investigated for cell wall stiffness,hardness and creep with respect to effects of chemical degradation,impregnation with a preservation agent,namely The Song Dynasty Shipwreck Monitoring and Analysisarchaeological wood by means of a 3D laser scanner.Nowak et al.[12] utilized the Resistance drilling method to assess the degradation state of wooden buildings of historical value.Tamburini et al.[13,14] used Py-GC/MS to analyze the degradation state of samples of ca.3000 years old oak wood from theThe Accelerated Degradation of ConservedAccelerated Degradation Testing in Conservation Few published works concerning the accelerated degradation of archaeological wood exist.This is not completely unexpected wood,generally speaking,is fairly stable as long as it is not exposed to excess

THE CHARACTERIZATION OF WATERLOGGED ARCHAEOLOGICAL

Magdalena Broda and Carmen-Mihaela Popescu,The natural decay of archaeological oak wood versus artificial degradation processes An FT-IR spectroscopy and X-ray diffraction study,Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy,10.1016/j.saa.2018.10.057,(2018).THE CHARACTERIZATION OF WATERLOGGED ARCHAEOLOGICALMagdalena Broda and Carmen-Mihaela Popescu,The natural decay of archaeological oak wood versus artificial degradation processes An FT-IR spectroscopy and X-ray diffraction study,Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy,10.1016/j.saa.2018.10.057,(2018).Sulfur and iron accumulation in three marine Feb 27,2014 State of Degradation in Archeological Oak from the 17th#0183;Sulfur and iron concentrations in wood from three 17th century shipwrecks in the Baltic Sea,the Ghostwreck,the Crown and the Sword,were obtained by X

Sulfur accumulation in the timbers of King Henry VIIIs

In marine-archaeological oak timbers of the Mary Rose large hull of the 17th-century Swedish warship Vasa during its 333 years on the seabed in Stockholm harbor (refs.48; see also within the waterlogged wood in amounts depending on the state of wood degradation,the concentration of hydrogen sulfide,and also iron(II) ions from State of degradation in archeological oak from the 17th State of degradation in archeological oak from the 17th century vasa ship Substantial strength loss correlates with reduction in (holo)cellulose molecular weightState of Degradation in Archeological Oak from the 17th State of Degradation in Archeological Oak from the 17th Century Vasa Ship Substantial Strength Loss Correlates with Reduction in (Holo)Cellulose Molecular Weight.Ingela Bjurhager * ,Helena Halonen State of Degradation in Archeological Oak from the 17th#167; ,Eva-Lisa Lindfors State of Degradation in Archeological Oak from the 17th#167;,Tommy Iversen State of Degradation in Archeological Oak from the 17th#167; ,Gunnar Almkvist ,E.Kristofer Gamstedt ,and ; Lars A.Berglund *

Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextOxidative degradation of archaeological wood and the

Oxygen consumption measurement was used to study potential oxidative degradation reactions occurring in wooden artefacts from the Viking age Oseberg collection in Norway.Model samples of fresh birch were impregnated with iron,calcium and alum salts to mimic concentrations of such compounds found in Oseberg artefacts and to assess their effect on oxygen consumption rates.Some results are removed in response to a notice of local law requirement.For more information,please see here.12345NextChemical characterization of archaeological wood Softwood Jul 01,2015 State of Degradation in Archeological Oak from the 17th#0183;The state of conservation of Vasa is a complex equilibrium between the chemical modification occurred G.Almkvist,E.K.Gamstedt,L.A.BerglundState of degradation in archeological oak from the 17th Century Vasa Ship substantial strength loss correlates with (II) and oxygen on degradation of oak-modeling of the Vasa wood.Holzforschung Some results are removed in response to a notice of local law requirement.For more information,please see here.

Revolt An Archaeological History of Pueblo Resistance and

Feb 06,2014 State of Degradation in Archeological Oak from the 17th#0183;Revolt An Archaeological History of Pueblo Resistance and Revitalization in 17th Century New Mexico (Archaeology of Indigenous-Colonial Interactions in the Americas) [Liebmann,Matthew] on .*FREE* shipping on qualifying offers.Revolt An Archaeological History of Pueblo Resistance and Revitalization in 17th Century New Mexico (Archaeology of IndigenousReviews 4Format PaperbackAuthor Matthew LiebmannSulfur accumulation in the timbers of King Henry VIIIs In marine-archaeological oak timbers of the Mary Rose large hull of the 17th-century Swedish warship Vasa during its 333 years on the seabed in Stockholm harbor (refs.48; see also within the waterlogged wood in amounts depending on the state of wood degradation,the concentration of hydrogen sulfide,and also iron(II) ions from RESEARCH ON DIMENSIONAL STABILITY ININ WATERLOGGED ARCHAEOLOGICAL WOOD DRIED IN A NON-COOLED VACUUM CHAMBER CONNECTED TO A LABORATORY FREEZE-DRYER The article presents changes in the dimensions of well-preserved,waterlogged ar-chaeological oak and pine wood,untreated and treated with PEG 300,after drying depending on the degree of degradation of the treated wood.

Polysaccharide degradation in waterlogged oak wood from

State of Degradation in Archeological Oak from the 17th CenturyVasaShip Substantial Strength Loss Correlates with Reduction in (Holo)Cellulose Molecular Weight Ingela Bjurhager,Helena Halonen,Eva-Lisa Lindfors,Tommy Iversen,Gunnar Almkvist,E.Kristofer Gamstedt,and Lars A.BerglundOxidative degradation of archaeological wood and the Oxygen consumption measurement was used to study potential oxidative degradation reactions occurring in wooden artefacts from the Viking age Oseberg collection in Norway.Model samples of fresh birch were impregnated with iron,calcium and alum salts to mimic concentrations of such compounds found in Oseberg artefacts and to assess their effect on oxygen consumption rates.Orthotropic creep in polyethylene glycol impregnated Creep in archaeological oak samples and planks from the Vasa ship impregnated with polyethylene glycol (PEG) has been studied in museum-like climate.Creep studies of duration up to three years have been performed in nearly constant relative humidity and temperature of the controlled museum climate.Cubic samples were subjected to compressive creep tests in all orthotropic directions.

Multifunctional supramolecular polymer networks as next

Dec 16,2014 State of Degradation in Archeological Oak from the 17th#0183;(2012) State of degradation in archeological oak from the 17th century Vasa ship Substantial strength loss correlates with reduction in (holo)cellulose molecular weight.Biomacromolecules 13 (8) 2521 2527.Multifunctional supramolecular polymer networks as next Dec 16,2014 State of Degradation in Archeological Oak from the 17th#0183;(2012) State of degradation in archeological oak from the 17th century Vasa ship Substantial strength loss correlates with reduction in (holo)cellulose molecular weight.Biomacromolecules 13 (8) 2521 2527.Monitoring archaeological wooden structures Non-contact Jan 01,2016 State of Degradation in Archeological Oak from the 17th#0183;Triangulation-based range (distance) measurements use information on the distance between the laser emitter and the sensor in combination with the angle of the reflected beam to triangulate the position of a point .This type of system is fast,but most useful for short ranges since the accuracy decreases with the square of the distance ,..The accuracy of non-triangulation-based laser

Molecules Free Full-Text Even Visually Intact Cell

Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW).Cell wall mechanical properties were examined by nanoindentation without prior embedding.WAW showed more than 25% decrease of both hardness and elastic modulus.Changes of cell wall composition,cellulose crystallite Land Degradation at Bettys Hope Historical Plantation The islands of the British West Indies in the eastern Caribbean have been subjected to continuous sugarcane farming since the 17th century.Current land degradation in Antigua has been attributed to centuries of intensive monocropping.However,recent scholarly discussion of the concept of landesque capital challenges the idea that long-term cultivation is a main driver of landscape degradation.Gunnar ALMKVIST Researcher PhD Swedish University of State of Degradation in Archeological Oak from the 17th Century Vasa Ship Substantial Strength Loss Correlates with Reduction in (Holo)Cellulose Molecular Weight Article Jul 2012

Deterioration of the Hanson Logboat chemical and imaging

Oct 20,2017 State of Degradation in Archeological Oak from the 17th#0183;MacLeod,I.D. Kenna,C.Degradation of archaeological timbers by pyrite oxidation of iron and sulphur species.in Proceedings of the 4th ICOM-Group on Wet Organic ArchaeologicalCited by 35Publish Year 2012Author Ingela Bjurhager,Helena Halonen,Eva-Lisa Lindfors,Tommy Iversen,Gunnar Almkvist,E.Kristofer GaState of degradation in archeological oak from the 17th State of degradation in archeological oak from the 17th century vasa ship Substantial strength loss correlates with reduction in (holo)cellulose molecular weight Bjurhager,Ingela KTH,School of Chemical Science and Engineering (CHE),Fibre and Polymer Technology.Cited by 35Publish Year 2012Author Ingela Bjurhager,Helena Halonen,Eva-Lisa Lindfors,Tommy Iversen,Gunnar Almkvist,E.Kristofer GaState of degradation in archeological oak from the 17th Aug 13,2012 State of Degradation in Archeological Oak from the 17th#0183;State of degradation in archeological oak from the 17th century Vasa ship substantial strength loss correlates with reduction in (holo)cellulose molecular weight.Bjurhager I(1),Halonen H,Lindfors EL,Iversen T,Almkvist G,Gamstedt EK,Berglund LA.

Cited by 35Publish Year 2012Author Ingela Bjurhager,Helena Halonen,Eva-Lisa Lindfors,Tommy Iversen,Gunnar Almkvist,E.Kristofer GaState of Degradation in Archeological Oak from the 17th

Request PDF State of Degradation in Archeological Oak from the 17th Century Vasa Ship Substantial Strength Loss Correlates with Reduction in (Holo)Cellulose Molecular Weight In 1628,the Cited by 35Publish Year 2012Author Ingela Bjurhager,Helena Halonen,Eva-Lisa Lindfors,Tommy Iversen,Gunnar Almkvist,E.Kristofer GaState of Degradation in Archeological Oak from the 17th Aug 02,2012 State of Degradation in Archeological Oak from the 17th#0183;State of Degradation in Archeological Oak from the 17th Century Vasa Ship Substantial Strength Loss Correlates with Reduction in (Holo)Cellulose Molecular Weight.Ingela Bjurhager * Helena Halonen State of Degradation in Archeological Oak from the 17th#167; Eva-Lisa Lindfors State of Degradation in Archeological Oak from the 17th#167; Tommy Iversen State of Degradation in Archeological Oak from the 17th#167; Gunnar Almkvist E.Kristofer Gamstedt Lars A.Berglund * Chemical characterization of archaeological wood Softwood Jul 01,2015 State of Degradation in Archeological Oak from the 17th#0183;The state of conservation of Vasa is a complex equilibrium between the chemical modification occurred G.Almkvist,E.K.Gamstedt,L.A.BerglundState of degradation in archeological oak from the 17th Century Vasa Ship substantial strength loss correlates with (II) and oxygen on degradation of oak-modeling of the Vasa wood.Holzforschung

Burial conditions and wood degradation at

tance for the protection of archaeological remains in situ.Degradation of buried archaeological wood is almost exclusively a microbiological process.Depending on the environment,different types of microorganisms are actively degrading wood.The most destructive are white-rot and brown-rot fungi (Grosser,1985).However,they are onlyA Warming Climate Threatens Archaeological Sites in Aug 30,2019 State of Degradation in Archeological Oak from the 17th#0183;A Warming Climate Threatens Archaeological Sites in Greenland As temperatures rise and ice melts,Norse and Inuit artifacts and human remains decompose more rapidly

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