Quantitative changes of sugi (Cryptomeria japonica) heartwood extractives by a high-temperature drying process

Shibutani, Sakae; Obataya, Eiichi; Hanata, Kensuke; S, Doi

doi:10.5990/jwpa.32.196

Cited by 4 publications

(4 citation statements)

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“…Ellwood et al (1960) reported that moisture migration in wood cell walls produced the partial deposition of watersoluble extractives on the surface area of wood after drying. Similar phenomena in extractive migration due to drying were also reported in cases of hardwood species (Miller et al 1990) and softwood species (Shibutani et al 2006, Okuda et al 2017. Previous studies on Japanese cedar also suggested that kiln drying under heating conditions at 708C or more involved quantitative reduction in terpenes and norlignans (Shibutani et al 2006, Okuda et al 2017).…”

supporting

confidence: 69%

“…Similar phenomena in extractive migration due to drying were also reported in cases of hardwood species (Miller et al 1990) and softwood species (Shibutani et al 2006, Okuda et al 2017. Previous studies on Japanese cedar also suggested that kiln drying under heating conditions at 708C or more involved quantitative reduction in terpenes and norlignans (Shibutani et al 2006, Okuda et al 2017). In addition, some researchers investigated the suppression method for sticker stains by adopting chemical predrying treatments (Xu and Clement 2008) and fumigation processes with some fumigants (Amburgey et al 1996;Schmidt et al 1997Schmidt et al , 2001.…”

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confidence: 69%

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Effects of Drying Temperatures on the Occurrence of Sticker Stain in Japanese Cedar (Cryptomeria japonica D. Don)

Toba¹,

Kanbayashi²,

Murano³

2021

Forest Products Journal

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Sticker stain is a material defect that results from moisture migration during wood drying, often spoiling the appearance of the surface of wood products. The effect of drying temperatures on the occurrence of surface sticker stain was investigated using Japanese cedar (Cryptomeria japonica D. Don) and three types of stickers (air-dried Japanese cedar, aluminum, and stainless steel) under four drying temperatures (20°C, 50°C, 75°C, and 100°C). At lower drying temperatures, the air-dried wood sticker tended to suppress the occurrence of surface sticker stains, whereas higher temperature or metal stickers produced sticker stains with deep color. However, no definitive relation was shown between the initial moisture content and the extent of sticker stain with deep color regardless of drying temperatures. It was considered that the partial delay of drying happened around the contact area with stickers, especially in cases of metal stickers. It was also found that the use of metal stickers at higher drying temperatures induced depressions in Fourier transform infrared spectra related to the occurrence of hygrothermal conditions.

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confidence: 69%

supporting

confidence: 69%

Effects of Drying Temperatures on the Occurrence of Sticker Stain in Japanese Cedar (Cryptomeria japonica D. Don)

Toba¹,

Kanbayashi²,

Murano³

2021

Forest Products Journal

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“…Furthermore, it is known that the drying temperature influenced the amount of extractives in cedar wood in previous studies. Shibutani et al [17] reported that the amount of extractives, especially terpenoid, in cedar wood dried at an average temperature of 105 °C and a maximum temperature of 120 °C for about 2 weeks was lower than that in cedar wood dried naturally for about 1 month. Karino et al [16] also reported that the amount of extractives in cedar wood decreased as the drying temperature increased.…”

Section: Resultsmentioning

confidence: 99%

“…With regard to the contribution of extractives to the NO 2 sorption ability of cedar wood, Tsujino et al compared the NO 2 sorption volume of specimens between before and after an extraction treatment using the system of JIS R 1701-1, and reported that extractives of cedar wood make a high contribution to the NO 2 sorption ability [11]. Karino et al [16] and Shibutani et al [17] reported that terpenoid and norlignans which are the main extractives in cedar wood vanished or decreased under a heat condition over 100 °C, which is possible to also influence the NO 2 sorption ability. Cedar wood has often been treated by kiln-drying to shorten the production process and prevent dimensional changes.…”

Section: Introductionmentioning

confidence: 99%

Influence of drying temperature on NO2 sorption ability of cedar timber

et al. 2020

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NO 2 sorption ability of cedar (Cryptomeria japonica) timbers was evaluated using a new measuring system that was developed in our previous study. Four drying conditions were applied, namely natural drying and three kinds of kilndrying at 45, 60, and 105 °C. Aeration experiments were conducted using discoid specimens which had a thickness in the longitudinal direction of 1.5 mm, and a diameter of 10 mm. The moisture content was conditioned to 0 or 9 ± 1.0% in each drying condition. As a result, the NO 2 sorption ability declined as the drying temperature increased. Based on the analysis of extractives, it was shown that the extractives content had a high correlation with the contribution ratio of extractives in the NO 2 sorption volume of the specimens that were dried below 60 °C. Therefore, it was elucidated that the specimen dried naturally has the greatest NO 2 sorption ability. Furthermore, the result of the gas chromatography-mass spectrometry (GC/MS) indicated that abietadiene influenced the NO 2 sorption ability. Also, the NO 2 sorption volume was high especially at the initial stage, which is higher under the condition with moisture.

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Woody plant extractives to reveal the resistance to the biodegradation of woods

Shibutani¹

2008

Mokuzai Hozon

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Quantitative changes of sugi (Cryptomeria japonica) heartwood extractives by a high-temperature drying process

Cited by 4 publications

References 1 publication

Effects of Drying Temperatures on the Occurrence of Sticker Stain in Japanese Cedar (Cryptomeria japonica D. Don)

Effects of Drying Temperatures on the Occurrence of Sticker Stain in Japanese Cedar (Cryptomeria japonica D. Don)

Influence of drying temperature on NO2 sorption ability of cedar timber

Woody plant extractives to reveal the resistance to the biodegradation of woods

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