Fourier-transform Raman spectroscopic study of a Neolithic waterlogged wood assemblage

“…In the low frequency region of the Raman spectra of the hardwood samples, the shoulders on the cellulose peaks located at 353-380 and 436-459 cm −1 band level (GIERLINGER; SCHWANINGER, 2007). The hemicellulose peaks at 496-521 cm −1 also had shifted to 538 cm −1 and decreased in band intensity (PETROU et al, 2009). According Table 10, similar peaks at the same point were found for both healthy and diseased samples; however, the intensities of the peaks of the healthy samples were determined to be lower than those of the diseased samples.…”

Section: Raman Analysismentioning

confidence: 98%

“…FT-Raman band assignments for hardwoods reported in the literature (AGARWAL et al, 1996;KAWAI, 2003;AGARWAL, 1985;BARSBERG et al, 2005;FISCHER et al, 2005;LAVINE et al, 2001;PETROU et al, 2009 …”

Section: Figure 10mentioning

confidence: 99%

Physical, Morphological Properties and Raman Spectroscopy of Chestnut Blight Diseased Castanea Sativa Mill. Wood

Gündüz

Oral

Akyüz

et al. 2016

CERNE

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ABSTRACT:In this study, some of the physical and anatomical properties of Chestnut Blight Diseased (CBD) wood were investigated, and the study also included observations using Raman spectroscopy. The objective of these investigations was to determine the extent of the damage that is done to the wood of the diseased chestnut trees, which must be removed from the forest and used in the manufacture of industrial products. It was indicated that most of the adverse effects of the disease were in the vascular cambium. There was a clear indication of deterioration of the wood in the last growth ring next to vascular cambium. In the diseased secondary xylem region next to vascular cambium; vessel diameter, vessel frequency and vessel element length had a decrease, and vessel and other cells were irregular compared to healthy wood. Spores were detected and identified as Cryphonectria parasitica (Murrill). Annual ring properties (annual growth ring width, latewood percentage, etc.) were similar in diseased wood compared to healthy wood. The Raman spectroscopy results showed no significant changes in the structure of the cell wall or its components. After removing the diseased parts, unlimited usage of formerly wood is possible. Heat treatment of the wood is suggested before use in the interest of sanitation and dimensional stability. PROPRIEDADES FÍSICAS E MORFOLÓGICAS E ESPECTROSCOPIA RAMAN DE MADEIRA DE CASTANEA SATIVA MILL. AFETADA PELO CANCRO DO CASTANHEIRORESUMO: Neste estudo, algumas das propriedades físicas e anatômicas de madeira afetada pelo cancro do castanheiro (CBD) foram investigadas, e o estudo também incluiu observações usando espectroscopia Raman. O objetivo destas investigações foi determinar a dimensão do dano que é causado na madeira dos castanheiros doentes, que devem ser removidos da floresta e utilizados na fabricação de produtos industriais. Foi avaliado que a maioria dos efeitos adversos da doença esta localizado no câmbio vascular. Há uma clara indicação de deterioração da madeira no último anel de crescimento junto ao câmbio vascular. Na região doente do xilema secundário ao lado do câmbio vascular o diâmetro, frequência e comprimento do vaso eram menores, e os vasos e outras células eram irregulares comparados à madeira saudável. Esporos foram detectados e identificados como Cryphonectria parasitica (Murrill). Propriedades dos anéis anuais (largura de anéis de crescimento anual, porcentagem de lenho tardio, etc.) foram similares em madeira doente e madeira saudável. O resultado da espectroscopia Raman não mostrou mudança significativa na estrutura da parede celular ou dos seus componentes. Depois de retirar as partes doentes, o uso ilimitado da madeira é possível. Tratamento térmico da madeira é sugerido antes da utilização para fins de saneamento e estabilidade dimensional.

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“…At FT-Raman spectrum of non-infected fl ax sample taken from the embroidered tablecloth, (PMP02) a relatively strong band at 457 cm -1 ( Figure 4, spectrum b), compared to the band at 435 cm -1 , appeared which is typical of ring vibrations [20]. Th is is a sign of relatively high crystallinity [26]. Th e same is true for the intensive band at 520 cm -1 , typical of glycoside links [19,20].…”

Section: Ft-raman Analysis Of the Bast Fi Bers Samplesmentioning

confidence: 98%

“…Th e decrease of the band at 380 cm -1 , typical of vibrations of glycoside ring [24], is a sign of decreased crystallinity of the cellulose [23]. Th e decrease of the band at 437 cm -1 , typical of glucose rings vibrations [24,26], is a sign of cellulose degradation [26]. Additionally, the bands at 1096 cm -1 and 1120 cm -1 , typical of asymmetric and symmetric β-glycosidic linkages respectively [24], decreased strongly relative to the reference spectrum.…”

Section: Ft-raman Analysis Of the Cotton Samplesmentioning

confidence: 99%

FT-Raman Analysis of Cellulose based Museum Textiles: Comparison of Objects Infected and Non-infected by Fungi

Kavkler¹,

Cimerman²,

Zalar³

et al. 2018

TEK

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It is well-known fact that the supermolecular structure of museum textiles changes during aging and biodeterioration. These structural changes can be observed by diff erent spectroscopic methods such as FT-IR, FT-Raman, and dispersive Raman spectroscopy. The purpose of the presented research is to present the usability of FT-Raman spectroscopy method for the analysis of the cellulose structure of the biodeteriorated historical textile fi bers. Although historical textiles have already been analyzed using FT-Raman spectroscopy the method has been rarely used to analyze the changes of supermolecular structure of the biodeteriorated historical textiles attacked by microorganisms. In the research, cellulose textile samples from diff erent museums and religious institutions were analyzed. Contemporary and historical cellulose textiles were scanned by FT-Raman spectra of reference and compared to determine the supermolecular cellulose fi ber structure of each material. It has been shown that structural changes such as depolymerization and crystallinity changes can be detected using FT-Raman spectroscopy. The supermolecular changes of the cellulose fi ber structure have been detected in biodeteriorated as well as in historical objects not infected by microorganisms. In the spectra of biodeteriorated objects, more intensive changes of spectral features were observed compared to spectra of non-infected samples. The changes were more pronounced at the museum objects made of fl ax. It can be concluded that biodeterioration causes more intensive structural changes than aging. On the basis of the research work, it has been shown that FT-Raman spectroscopy method can be used for the analysis of supermolecular structure changes of cellulose textiles.

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Fourier-transform Raman spectroscopic study of a Neolithic waterlogged wood assemblage

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Cited by 33 publications

References 19 publications

Assessment of the weathering effects on cellulose based materials through a multianalytical approach

Assessment of the weathering effects on cellulose based materials through a multianalytical approach

Physical, Morphological Properties and Raman Spectroscopy of Chestnut Blight Diseased Castanea Sativa Mill. Wood

FT-Raman Analysis of Cellulose based Museum Textiles: Comparison of Objects Infected and Non-infected by Fungi

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