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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Wood Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Wood Science Technology
Editor in Chief :
Volume & Issues
Volume 39, Issue 6 - Nov 2011
Volume 39, Issue 5 - Sep 2011
Volume 39, Issue 4 - Jul 2011
Volume 39, Issue 3 - May 2011
Volume 39, Issue 2 - Mar 2011
Volume 39, Issue 1 - Jan 2011
Selecting the target year
Effect of Treatment Amounts of Slurry Composting and Biofiltration Liquid Fertilizer on Growth Characteristics and Bioethanol Production of Yellow Poplar
Kim, Ho-Yong ; Gwak, Ki-Seob ; Kim, Hye-Yun ; Ryu, Keun-Ok ; Kim, Pan-Gi ; Cho, Do-Hyun ; Choi, Jin-Yong ; Choi, In-Gyu ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 459~468
DOI : 10.5658/WOOD.2011.39.6.459
The main purpose of this study was to examine the influence of treatment amounts of Slurry Composting and Biofiltration liquid fertilizer (SCBLF) on biomass growth of Yellow poplar (Liriodendron tulipifera) and to compare bioethanol production from the harvested wood. Relative growth rate, biomass production and leaf characteristics were significantly enhanced by SCBLF treatment and medium treatment plot showed highest value. Nitrogen compounds and water content in SCBLF affected to increase chlorophyll contents which led improving biomass production (64.67%) and glucose contents (6.07%) than control. Organosolv and dilute acid pretreatments were preliminarily carried for bioethanol production, and the pretreatment processes were conducted at all the same solid to liquid ratio (1 : 10), reaction temperature (
), preheating time (40 min) and residence time (10 min). The water insoluble solid recovery of Organosolv pretreatment with 1% sulfuric acid as a catalyst was the lowest and that of medium treatment plot was 44.81%. Exchangeable cations in SCBLF might be affected to increase pretreatment effect. The simultaneous saccharification and fermentation process was followed to determine the ethanol production of the pretreated biomass. The highest ethanol production yield based on initial weight was obtained from high treatment plotby Organosolv pretreatment with 1% sulfuric acid (16.11%). But regarding biomass production, medium treatment plot produced most, and bioethanol production was increased by 72.93% than control.
Ceriporia sp. ZLY-2010 in Biodegradation of Polychlorinated Biphenyls : Extracellular Enzymes Production and Effects of Cytochrome P450 Monooxygenase
Hong, Chang-Young ; Gwak, Ki-Seob ; Lee, Su-Yeon ; Kim, Seon-Hong ; Jeong, Han-Seob ; Choi, In-Gyu ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 469~480
DOI : 10.5658/WOOD.2011.39.6.469
In this study, to determine the ligninase activity related to the PCBs degradation of Ceriporia sp. ZLY-2010, the protein contents and manganese peroxidase (MnP) and laccase activities during cultivation on shallow stationary culture (SSC) medium were observed. 4 PCB congeners were selected depending on the number of chlorine substituted on biphenyl. Furthermore, to examine the effects of cytochrome P450 monooxygenase, the inhibition of cytochrome P450 monooxygenase was evaluated by measuring the biodegradation rate when inhibitor such as 1-aminobenzotriazole was added. The extracellular protein contents were affected by PCB congeners in culture media. The total protein in the culture medium showed the biggest differences between the samples containing 2,2',4,4',5,5'-hexachlorobiphenyl and the control. On the other hand, MnP and laccase activity showed dominant increases within samples containing 4,4'-dichlorobiphenyl and 2,3',4',5-tetrachlorobiphenyl. Cytochrome P450 monooxygenase was inhibited by adding inhibitor, 1-aminobenzotriazole in low concentration. Only 2.73% of 2,3',4',5-tetrachlorobiphenyl was degraed on day 1, and biodegradation of 2,2',4,4',5,5'-hexachlorobiphenyl was inhibited as well, showing about 20% of biodegradation rate.
Evaluation of Pretreatment Moisture Content and Fixation Characteristics of Treated Wood for Pressure Treatment of Japanese Red Pine and Japanese Larch Skin Timber with ACQ, CUAZ and CuHDO
Choi, Yong-Seok ; Oh, Se-Min ; Kim, Gyu-Hyeok ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 481~489
DOI : 10.5658/WOOD.2011.39.6.481
This study was conducted to evaluate the pressure treatment characteristics of Japanese red pine and Japanese larch skin timber with ACQ-2, CUAZ-2 and CuHDO-1. The effect of moisture content (MC) on preservative treatability was investigated for Japanese red pine sapwood and Japanese larch heartwood, and fixation characteristics of CCA alternatives was also evaluated. Japanese red pine sapwood, which was dried below 30 percent MC, was fully penetrated with preservatives, and minimum requirement of preservative retention for the hazard class H3 was achieved. Through measuring preservative retention gradient in Japanese red pine sapwood, it was confirmed that the retention gradient of CuHDO-1 was steeper than that of both ACQ-2 and CUAZ-2. In particular, it was intensified at a higher MCs of wood samples (25∼30%). Japanese larch heartwood did not meet the minimum requirement of penetration and retention for the hazard class H3 over the range of pretreatment MCs tested. With presteaming under
for 12 hours, the treatability of Japanese larch heartwood was enhanced to meet the minimum requirement for the hazard class H3. The fixation rate of copper was much more faster under drying condition compared with nondrying condition; more than 95% of copper were fixed in 3~6 days and 1 day under drying conditions in Japanese red pine sapwood and Japanese larch heartwood, respectively. After 3-week fixation period at ambient temperature, the amount of mobile copper in treated wood sample that remains available for leaching from treated wood was the highest in the wood samples treated with ACQ-2, followed by CuHDO-1 and CUAZ-2. It was proportional to the amount of copper in treating solution.
Optimal Condition for Simultaneous Saccharification and Fermentation Using Pretreated Corncob by Oxalic Acid
Seo, Young-Jun ; Lim, Woo-Seok ; Lee, Jae-Won ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 490~497
DOI : 10.5658/WOOD.2011.39.6.490
In this study, we determined optimal conditions for simultaneous saccharification and fermentation (SSF) using corncob biomass pretreated with oxalic acid. The effect of SSF temperature (
) and agitation speed (80~220 rpm) were significant at a 99% confidence level in its effect on ethanol production. The highest ethanol production was expected when SSF was performed at
, 170 rpm (22.5 g/L). The ethanol production was improved by mixture of yeast extract (1.25 g/L) and urea (1.25 g/L) as nitrogen source. However, addition of trace metal components and vitamin for SSF was not affected in the ethanol production. Optimal concentration of
for SSF was 1 g/L, 0.25 g/L respectively.
Bond Strength of Plywood Manufactured with Adhesive of pMDI-Ozonized Waste Cooking Oil
Kang, Chan-Young ; Lee, Eung-Su ; Seo, Jun-Won ; Park, Heon ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 498~504
DOI : 10.5658/WOOD.2011.39.6.498
The purpose of this study was to investigate and develop an eco-frendly wood adhesive based on vegetable oil (especially soybean oil), the renewable and sustainable natural resources, using ozonification technology for the chemical structure modification. The waste soybean oil (WSBO) was reacted with
at the rate of
(WSBO) for different times, 1, 2, 3 hrs. The investigation of the modified chemical strecture of the ozonied WSBOs were conducted using FT-IR. As ozonification time increased, the peak of the unsaturated double bonds was disappeared especially ozonized-3hrs and aldehyde or carboxyl peak appeared because ozonification broke the oil into small molecules. The plywood were made at
with 4 minutes hot-press time using the different ozonized 3 hrs WSBO/pMDI adhesives and were tested for the dry, wet, cyclic boil test according to the Korea Industrial Standard F3101 Ordinary plywood. The bond strengths gradually increased until 1 : 0.5~1 : 3, but it decreased 1 : 4, as the contents of pMDI increased. The results of the dry, wet and cyclic bond strengths the equivalent ratio was formed approximately between 1 : 2~1 : 3. And the 1 : 1~1 : 4 strengths met constantly the standard requirement of 7.0kgf/
(KS F3101). From the comprehensive view on the results of above experiment, it could be confirmed that ozonized WSBO/pMDI has characteristics of effective reactivity and wet stability showed as an excellent candidate of wood adhesive applications.
Aging Characteristics of Bolt Pretension of Stress-laminated Timber
Eom, Chang-Deuk ; Lee, Sang-Joon ; Kim, Kwang-Mo ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 505~511
DOI : 10.5658/WOOD.2011.39.6.505
In this study, it is carried out to analysis of the bolt pretension of the stress-laminated timber. Bolt pretension of stress-laminated timber was decreased by time. The loss of force is caused by moisture content, shrinkage of wood. After re-stressing the stress-laminated timber, the rate of force decrement was slowed significantly. To use of stress-laminated timber for the service, it is necessary to make an accurate estimate of force. It is clear that is different between actual value and predicted value changes by existing model for bolt pretension of stress-laminated timber. Accordingly, considering the time and the external environment, the development of prediction model is needed.
Development of Green Drying System Using Waste Heat from Charcoal Kiln
Kwon, Gu-Joong ; Kwon, Sung-Min ; Jang, Jae-Hyeok ; Hwang, Won-Joung ; Kim, Nam-Hun ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 512~520
DOI : 10.5658/WOOD.2011.39.6.512
This study was preformed to investigate the characteristics of the green drying system for utilizing heat wasted during carbonization process. The green drying system utilizing waste heat is one of environment-friendly equipments because it needs no other energies from fossil fuel and etc. In this study, waste heat from three kilns was collected by stainless connection pipe, and in the green drying system the temperature and humidity was hardly changed. Charcoal charecteristics as fixed carbon, refining degree, hardness, pH, calorific value, and charcoal yield were analyzed to investigate kiln performance due to installation of green drying system. As a result, the green dry system installation hardly affected the characteristics of charcoal. In conclusion, the green drying system can be applied to maximize the profit of the farm household income and contribute to reduce fossil energy.
Performance of Structural Glulam Laminated with CuAz-3 Preservative Treated Lumber
Kim, Kwang-Mo ; Eom, Chang-Deuk ; Lee, Sang-Joon ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 521~530
DOI : 10.5658/WOOD.2011.39.6.521
Nowadays, market demand of structural Glulam is growing and diversifying. The durability of Glulam should be significantly considered when they are intended to apply for out-door use such as timber bridge and pergola. This study was aimed to develop the manufacturing process of preservative treated structural Glulam using domestic softwood species. 10 m long structural Glulam were manufactured from domestic pitch pine logs with CuAz-3 preservative treatment. At each manufacturing process, the production yield was evaluated. Finally, bending tests were performed to verify the structural performance of manufactured Glulam. From the results, it was shown that the preservative treatment process hardly influenced on the production yield. But domestic pitch pine was proved to not be suitable for making the preservative treated Glulam due to the large difference of preservative permeability between sapwood and heartwood.
Determination of Decay Hazard Index (Scheffer Index) in Korea for Exterior Above-Ground Wood
Kim, Tae-Gyun ; Ra, Jong-Bum ; Kang, Sung-Mo ; Wang, Jieying ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 531~537
DOI : 10.5658/WOOD.2011.39.6.531
This research was performed to evaluate the decay hazard for exterior above-ground wood in Korea. The Scheffer index (decay hazard index) was determined using the climate data of 72 different locations obtained from the website of Korea Meteorological Administration (KMA), and the wood decay hazard map was created. Jeju, Seogwipo, Gwangju, and Jeonju showing above 65 of Scheffer index values were considered to be high decay hazard zones. The rest showed the values in the range between 35 and 65, meaning the moderate decay hazard zones. However, the annual Scheffer indexes largely varied, which suggests that many moderate decay zones could turn into high decay regions with the climate change. Especially, considering that Korean weather tends to turn into the weather of subtropical region, the decay hazard of Korea seems to have high possibility to be gradually increased.
Effect of Green Tea Content on Dynamic Modulus of Elasticity of Hybrid Boards Composed of Green Tea and Wood Fibers, and Prediction of Static Bending Strength Performances by Flexural Vibration Test
Park, Han-Min ; Lee, Soo-Kyeong ; Seok, Ji-Hoon ; Choi, Nam-Kyeong ; Kwon, Chang-Bea ; Heo, Hwang-Sun ; Byeon, Hee-Seop ; Yang, Jae-Kyung ; Kim, Jong-Cheol ;
Journal of the Korean Wood Science and Technology, volume 39, issue 6, 2011, Pages 538~547
DOI : 10.5658/WOOD.2011.39.6.538
In this study, eco-friendly hybrid composite boards were manufactured from green tea and wood fibers for application as interior materials with various functionalities of green tea and strong strength properties of wood fibers. In this relation, the effect of green tea content on dynamic MOEs (modulus of elasticity) of these green tea and wood fibers composite boards were investigated. The dynamic MOEs of hybrid composite boards were lower than those of control boards without green tea, and the values decreased with the increase of green tea content. Also, the dynamic MOEs appeared to be somewhat different by resin type used for board manufacture. The hybrid composite boards manufactured from
grade urea resin, which has higher molar ratio of formaldehyde to urea than that of
grade one, were 1.06~1.54 times higher than that manufactured from
grade. And, the differences between hybrid composite boards manufactured from both adhesive increased with the increase of green tea content. On the other hand, high correlations were found between dynamic MOE and static bending strength performances, it was concluded that static bending strength performances could be estimated from the dynamic MOE, except for a few hybrid board types with large variations.