Journal of the Korean Wood Science and Technology

About Journal of the Korean Wood Science and Technology

The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally.
Original Article

Sep 30, 2022

Monitoring of Moisture and Dimensional Behaviors of Nail-Laminated Timber (NLT)-Concrete Slab Exposed to Outdoor Air

Sung-Wook HWANG, Hyunwoo CHUNG, Taekyeong LEE, Kyung-Sun AHN, Sung-Jun PANG, Junsik BANG, Hyo Won KWAK, Jung-Kwon OH, Hwanmyeong YEO

J. Korean Wood Sci. Technol. 2022;50(5):301-314.
https://doi.org/10.5658/WOOD.2022.50.5.301

The moisture and dimensional behaviors of a nail-laminated timber (NLT)–concrete slab composed of an NLT–plywood composite and topping concrete are monitored for 385 days. The slab is developed for using as flexural elements such as floors. The humidity control of wood gently introduces significant fluctuations under the ambient relative humidity into the slab, and fluctuations in the relative humidity result in dimensional changes. The equilibrium moisture content of the slab increases from 6.7% to 15.3% during the monitoring period, resul...
Original Article

Sep 30, 2022

Termicidal Activity and Chemical Components of Wood Vinegar from Nipah Fruit against Coptotermes curvignathus

Hasan Ashari ORAMAHI, Mika Jessika TINDAON, Nurhaida NURHAIDA, Farah DIBA, Hikma YANTI

J. Korean Wood Sci. Technol. 2022;50(5):315-324.
https://doi.org/10.5658/WOOD.2022.50.5.315

The termicidal activity and chemical components of wood vinegar from two sources of biomass, nipah fruit shells (NFS) and a mixture of shells and fiber (MSF), were evaluated against Coptotermes curvignathus. A no-choice test was carried out to evaluate their termicidal activity using filter paper samples treated with 2.5%, 5.0%, 7.5%, 10.0%, and 12.5% NFS or MSF vinegar. Both wood vinegars exhibited antitermitic activity against C. curvignathus. The results show that increased concentrations of NFS and MSF vinegar significantly increased termit...
Original Article

Sep 30, 2022

Influence of Alkali and Silane Treatment on the Physico-Mechanical Properties of Grewia serrulata Fibres

Bhupesh JAIN, Ravindra MALLYA, Suhas Yeshwant NAYAK, Srinivas Shenoy HECKADKA, Shrinivasa PRABHU, G. T. MAHESHA, Gaurav SANCHETI

J. Korean Wood Sci. Technol. 2022;50(5):325-337.
https://doi.org/10.5658/WOOD.2022.50.5.325

Grewia serrulata fibres were chemically treated with 3%, 6%, and 9% NaOH for the duration of 4 h. Additionally, the NaOH-treated fibres were also treated with 3 – (trimethoxysilyl) propyl methacrylate (silane). Properties such as density and tensile strength of the treated fibres were compared against the untreated fibres. The highest density was obtained in the case of 9% NaOH + silane treated fibres, which was 26.47% higher than untreated fibres, implying effective removal of hemicellulose. Likewise, the highest tensile strength was also ob...
Original Article

Sep 30, 2022

Antioxidative and Circadian Rhythm Regulation Effect of Quercus gilva Extract

Jin-Sung HUH, Sora LEE, Dong-Soo KIM, Myung Suk CHOI, Hyunmo CHOI, Kyung-Ha LEE

J. Korean Wood Sci. Technol. 2022;50(5):338-352.
https://doi.org/10.5658/WOOD.2022.50.5.338

Herein, water and ethanol extracts were obtained from the leaves, branches, kernels, and pericarp of Quercus gilva and subsequently analyzed for antioxidant activity and circadian rhythm regulation effects. Candidate components that may affect circadian rhythm and antioxidant activity were investigated to discover potential functional materials. Antioxidant activity was analyzed via 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity assays, showing that the hot w...
Original Article

Sep 30, 2022

Synchrotron X-Ray Diffraction Studies on Crystalline Domains in Urea–Formaldehyde Resins at Low Molar Ratio

Eko Setio WIBOWO, Byung-Dae PARK, Valerio CAUSIN, Dongyup HAHN

J. Korean Wood Sci. Technol. 2022;50(5):353-364.
https://doi.org/10.5658/WOOD.2022.50.5.353

The crystalline domain of thermosetting urea–formaldehyde (UF) resins at low formaldehyde-to-urea (F/U) molar ratios (≤1.0) is known to be responsible for their poor performance as wood adhesives. Crystallization has been observed in 1.0 F/U UF resins during the addition reaction stage and at the end of the synthesis process (neat UF resins). The crystallinity and X-ray diffraction (XRD) spectra of the uncured neat UF resins, on the other hand, differed significantly from those of the cured neat UF resins, raising the possibility that their...
Original Article

Sep 30, 2022

Investigation of Sound Absorption Ability of Hinoki Cypress (Chamaecyparis obtusa) Cubes

Eun-Suk JANG

J. Korean Wood Sci. Technol. 2022;50(5):365-374.
https://doi.org/10.5658/WOOD.2022.50.5.365

Today, commercialized Hinoki cypress cubes are used for fragrance, humidification, and pillows in Korea. In this study, the sound absorption ability of Hinoki cypress (Chamaecyparis obtusa) cubes was examined. The three groups of Hinoki cypress cubes were prepared depending on their dimension (L: 9 × 9 × 9, M: 7 × 7 × 7, S: 4 × 4 × 4 mm). Their sound absorption coefficient was examined after filling 6, 8, 10, and 12 cm height in impedance tubes, respectively. Overall, the sound absorption ability depending on dimension was superior in the...

CURRENT ISSUE: Sep 2022, Vol. 50, No. 5

Original Article Monitoring of Moisture and Dimensional Behaviors of Nail-Laminated Timber (NLT)-Concrete Slab Exposed to Outdoor Air Sung-Wook HWANG, Hyunwoo CHUNG, Taekyeong LEE, Kyung-Sun AHN, Sung-Jun PANG, Junsik BANG, Hyo Won KWAK, Jung-Kwon OH, Hwanmyeong YEO J. Korean Wood Sci. Technol. 2022;50(5):301-314. https://doi.org/10.5658/WOOD.2022.50.5.301 HTML PDF PubReader	Original Article Termicidal Activity and Chemical Components of Wood Vinegar from Nipah Fruit against Coptotermes curvignathus Hasan Ashari ORAMAHI, Mika Jessika TINDAON, Nurhaida NURHAIDA, Farah DIBA, Hikma YANTI J. Korean Wood Sci. Technol. 2022;50(5):315-324. https://doi.org/10.5658/WOOD.2022.50.5.315 HTML PDF PubReader
Original Article Influence of Alkali and Silane Treatment on the Physico-Mechanical Properties of Grewia serrulata Fibres Bhupesh JAIN, Ravindra MALLYA, Suhas Yeshwant NAYAK, Srinivas Shenoy HECKADKA, Shrinivasa PRABHU, G. T. MAHESHA, Gaurav SANCHETI J. Korean Wood Sci. Technol. 2022;50(5):325-337. https://doi.org/10.5658/WOOD.2022.50.5.325 HTML PDF PubReader	Original Article Antioxidative and Circadian Rhythm Regulation Effect of Quercus gilva Extract Jin-Sung HUH, Sora LEE, Dong-Soo KIM, Myung Suk CHOI, Hyunmo CHOI, Kyung-Ha LEE J. Korean Wood Sci. Technol. 2022;50(5):338-352. https://doi.org/10.5658/WOOD.2022.50.5.338 HTML PDF PubReader
Original Article Synchrotron X-Ray Diffraction Studies on Crystalline Domains in Urea–Formaldehyde Resins at Low Molar Ratio Eko Setio WIBOWO, Byung-Dae PARK, Valerio CAUSIN, Dongyup HAHN J. Korean Wood Sci. Technol. 2022;50(5):353-364. https://doi.org/10.5658/WOOD.2022.50.5.353 HTML PDF PubReader	Original Article Investigation of Sound Absorption Ability of Hinoki Cypress (Chamaecyparis obtusa) Cubes Eun-Suk JANG J. Korean Wood Sci. Technol. 2022;50(5):365-374. https://doi.org/10.5658/WOOD.2022.50.5.365 HTML PDF PubReader

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