An FT-IR study of the changes in chemical composition of bamboo degraded by brown-rot fungi

Tomak, Eylem Dizman; Topaloğlu, Elif; Gümüşkaya, Esat; Yıldız, Ümit Cafer; Ay, Nurgül

doi:10.1016/j.ibiod.2013.05.029

Cited by 79 publications

(44 citation statements)

References 29 publications

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“…For practice and economic reasons, sets 5a, 5b and 8a, 8b seem preferable than set 10, because oil is only used for the cooling and not needed for the treatments. From the good results observed on sets 5a, 5b, 8a, and 8b, it is suggested that the treatment at a high temperature (180 • C), during a reasonable time (1 or 2 h) can destroy sugar, starch, and protein which are highly susceptible to attack by fungi [26,27]; then the less-sensitive material was covered by oil during the cooling, which led the material to have a better durability. A longer treatment (from 3 h) at 180 • C can destroy more elements in the micro-structure of bamboo, which leads to the cracking presented in the previous section.…”

Section: Discussionmentioning

confidence: 99%

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

2017

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Bamboo is a natural material having a fast reproduction and high mechanical strengths. However, when a bio-based material in general, and bamboo in particular are expected to be a construction material, their sensitivity to moisture and their durability are usually questionable. Indeed, it is well known that these materials do not possess the same performance in the long-term, when compared to industrial materials. Sustainable solutions for the bamboo treatment still need to be investigated. The present study explores the oil-heated treatment with different types of oils, like flax or sunflower oils. The present investigation concentrates on mechanical properties and durability of treated bamboos to assess the effectiveness of these kinds of treatment. First, bamboo specimens were treated to decrease their sensitivity to moisture and improve their durability. Different conditions of treatment were tested: treatment at 100 • C or 180 • C; with flax oil, sunflower oil, or without oil; treatment durations of 1 h, 2 h, or 3 h; and, different cooling methods and cooling durations. Then, mechanical and durability tests were carried out on untreated and treated bamboos: uniaxial compression tests, 3 points bending tests, water immersion tests, and humidity tests. The results showed that some tested treatment methods could increase both the durability and the compressive strength of treated specimens, compared to untreated bamboo. The best results were observed on specimens treated at 180 • C during 1 h or 2 h without oil, and then cooled in 20 • C sunflower oil.

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Section: Discussionmentioning

confidence: 99%

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

2017

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“…Due to the fast growing characteristics of bamboo, it has been recognized as a promising plant to sequester CO2 and reduce the pressure on natural resources (Vogtlander et al 2010;Cao et al 2014;Escamilla and Habert 2014;Ren et al 2014). Many researchers have reported the diverse properties of bamboo such as anatomical structure, physical and mechanical properties, chemical composition, and degradation (Li et al 2007;Wang and Ren 2008;Rousset et al 2011;Tomak et al 2013;Wahab et al 2013). Giant bamboo (Dendrocalamus giganteus Wallich ex Munro) belongs to the subfamily Bambusoideae of the family Poaceae (Gramineae).…”

Section: Profiling the Chemical Composition And Growth Strain Of Gianmentioning

confidence: 99%

“…Peak assignments of FTIR spectra of main compositions of bamboo were adapted considering the spectral data from related studies (Faix 1992;Li et al 2010;Qi et al 2013;Tomak et al 2013;Peng et al 2014), as shown in Table 1. Figures 2 and 3 show the FTIR spectra of the various layers of giant bamboo culms IN40 and IN8.…”

Section: Radial and Longitudinal Depth Profiling Of Lignin Content Ofmentioning

confidence: 99%

Profiling the Chemical Composition and Growth Strain of Giant Bamboo (Dendrocalamus giganteus Munro)

Chang¹,

Yeh²,

Hsu³

et al. 2015

BioResources

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The chemical composition of the wax layer and green epidermis at the surface of giant bamboo (Dendrocalamus giganteus Munro) culms were conveniently analyzed through the diffuse reflectance infrared Fourier transform (DRIFT) with Si-Carb sampling technique. Results from the radial lignin content profiling of giant bamboo showed that the lignin content in the middle layer was lower than the layers either from the inner or outer culms. As for the longitudinal depth profiling, the lignin contents of bamboo culms increased gradually from the top toward base portion. The distribution of growth strains in the radial direction of giant bamboo culm was investigated by the kerf method with strain gauges. The longitudinal tensile strains in various positions of giant bamboo culm were found to decrease in the order of the middle layer, the outer layer, and the inner layer. The tensile strains of different layers in the radial direction of giant bamboo culm correlate with their lignin content. The highest tensile strain on the middle layer of the bamboo culm was associated with the lowest lignin content. These results provided experimental evidence in the relationship between longitudinal tensile strain and lignin content of bamboo culm.

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“…Although white-rot fungi have received the most attention as potential biological pretreatment options for deconstructing lignocellulose in bamboo, they are also known to mineralize lignin during delignification leading to lignin structures that are not readily converted to addedvalue lignin co-products. More recent evidence suggests that brownrot fungi may serve a potential role in bamboo pretreatment strategies [193][194][195][196][197]. Using FT-IR, it was shown that the brown-rot fungus Gloeophyllum trabeum could efficiently breakdown p-hydroxyphenyl units in the lignin found in the middle lamella of Moso bamboo [194].…”

Section: Bamboo Fungimentioning

confidence: 99%

“…Using FT-IR, it was shown that the brown-rot fungus Gloeophyllum trabeum could efficiently breakdown p-hydroxyphenyl units in the lignin found in the middle lamella of Moso bamboo [194]. In another study, using FT-IR data, it was determined that two brownrot fungi -Coniophora puteana and Poria placenta -could remove lignin from bamboo lignocellulose with little or no modification to the protolignin [196]. This is consistent with another study, in which it was observed that white-rot fungus P. chrysosporium preferentially degraded lignin over hemicellulose and cellulose, while the brown-rot fungus, G. trabeum, preferred the hemicellulose fraction over cellulose and lignin.…”

Section: Bamboo Fungimentioning

confidence: 99%

Bioethanol: Feedstock Alternatives, Pretreatments, Lignin Chemistry, and the Potential for Green Value-Added Lignin Co-Products

MKY¹,

AX²,

S³

2015

J Environ Anal Chem

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An FT-IR study of the changes in chemical composition of bamboo degraded by brown-rot fungi

Cited by 79 publications

References 29 publications

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

A Bamboo Treatment Procedure: Effects on the Durability and Mechanical Performance

Profiling the Chemical Composition and Growth Strain of Giant Bamboo (Dendrocalamus giganteus Munro)

Bioethanol: Feedstock Alternatives, Pretreatments, Lignin Chemistry, and the Potential for Green Value-Added Lignin Co-Products

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