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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Wood Science and Technology
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Journal DOI :
The Korean Society of Wood Science Technology
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Volume & Issues
Volume 34, Issue 6 - 00 2006
Volume 34, Issue 5 - 00 2006
Volume 34, Issue 4 - 00 2006
Volume 34, Issue 3 - 00 2006
Volume 34, Issue 2 - 00 2006
Volume 34, Issue 1 - 00 2006
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Histochemical and Cytochemical Studies on the Secondary Xylem Formation during Grafting Process of Pinus thunbergii
Kim, Jong-Sik ; Kim, Yun-Su ; Lee, Gwang-Ho ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 1~11
Grafted tissues were investigated using various microscopic techni ques. Pinus thunbergii was－ 1 －1)김종식이광호김윤수－ 2 －used as stock and scion and autografted b y cleft graft method. Histochemical y, grafting procese scan be proceded by four stages: 1) formation of necrotic layer, 2) proliferation of calus, 3) devel -opment of neo-cambium from calus, and 4) re storation of new vascular xylem. Necrotic la yer composed of pectin and lignin was gradually de graded during grafting proces and disappeared when new union was formed between stock and scio n. A large number of starch and lipid bodie sin the cytoplasm were also gradually degraded during grafting proces and disappeared at the grafting interface. Nucleus and plasmodesmata were not changed. Bubb le-like callus was gen-erated from all living parenchyma cells and from the callus. The tracheary elements differentiate dfrom the callus had either reticulate or pit-like thickenings in the secondar y walls with bordered pits. Secondary cell wall thickening occurred toward filing to the void parts betwen reticulatedsecondary wall. Tracheids formed in the seco ndary xylem were short with irregular wall thickness. New secondary xylem cells with swir led shapes, which developed in graft union wereoriented horizontally and obli quely to axis of the stem.
Species Identification and Tree-Ring Dating of Coffin Woods Excavated at Ma-Jeon Relic in Jeonju, Korea
Park, Won-Gyu ; Yun, Du-Hyeong ; Park, Su-Hyeon ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 12~20
The objectives of this study were to identify the species of coffin woods excavated at Ma-jeon relic in Jeonju and to date this cofin using tree-ring method. Al cofin woods were identified as red pines, most possibly, Pinus densiflora S. et Z. Tree-ring dating provides a calender year to each ring and produces the cutting date, if the bark presents. Due to the presence of bark and complete latewood present, the cutting date of the tree for cofin turned out between A.D. 1637 autumn and 1638 spring. However, due to the se asoning and storage periods, actual coffin manu-facturing and burial time may be a litle different from the tree-ring date.
Effect of Carbonized Wastewoods on Soil Improvement(2)
Sin, Chang-Seop ; Kim, Byeong-Ro ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 21~28
This stud y was caried out to examine the effect of soil improvement according to the shapeof charcoal and the kind of carbonized tree species. As the results, all of the seedlings of Thuj aoccidentalis and Aesculus turbinata grew better in the charcoal-treated soil than the non-treate dsoil. In case of powder charcoal, Thuja occidentalis seedlings grew up best in the soil treated with powder charcoal of Pinus koraiensis and then grew well in order of Larix leptolepis > par-ticle board > Quercus acutissima . In case of granulated charcoal, the sedlings grew wel in orde rof the granulated charcoal of Larix leptolepis > particle board > Pinus koraiensis . It was anal yzed－ 21 －1)신창섭김병로－ 22 －that the soil porosit y and the organic matter content were mo re in the charcoal -treated soil thanthe non-treated soil also. It is inferred that because the aeration property and the absorption o forganic matter were increased in the root zone, the growth of seedlings was better in the char-coal-treated soil.
단판 함수율이 지방산 글리세롤 pMDI의 접착력에 미치는 영향(Ⅰ) - 상태접착력-
Choe, Jin-Rim ; Park, Heon ; Lee, Taek-Jun ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 29~35
This stud y was conducted to investigat e the bonding strength of pl ywood bonded with fatt y acid-glycerol-pMDI adhesives with equivalent ratios of 1:1:2, 1:1:3, 1:1:4, 1:1:5, and 1:1:6. With veneer－ 29 －1)최진림이택준박 헌－ 30 －moisture contents of 0%, 3%, 5%, 8% and 15%, the bonding strengths exceeded the re quirement of Korean plywood standard of 7.0 kgf/ cm2 with values of 13.7 kgf/ cm2, 11.6 kgf/cm2, 11.2 kgf/cm2, 9.8 kgf/cm2, and 7.4 kgf/ cm2, respectively at faty acid-glycerol-pMDI ratio of 1:1:2. With vener moisture content of 30%, the bonding strengths exceeded th e requirement of Korean plywood standard of 7.0 kgf/cm2, when fatty acid-glycerol-pMDI ratios were 1:6. Finally for satisfying the Korean pl ywood standard, the ratio of MDI in fatty acid-glycerol-pMDI should be increased with increasing of veneer moisture content.
Characterization of Bio-oils Produced by Fluidized Bed Type Fast Pyrolysis of Woody Biomass
Choe, Jun-Won ; Choe, Don-Ha ; Jo, Tae-Su ; Meier, D. ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 36~43
Using fluidized bed type fast pyrolysis system (capacity 400 g/h) bio-oils were produced frombeech (Fagus sylvatica) and softwood mixture (spruce and larch, 50:50). The pyrolysis was per-1)목질바이오매스의 급속열분해에 의해 생성된 바이오오일의 특성 분석－ 37 －formed for 1 ∼2 s at the temperature of 470 ± 5 oC. Pyrolysis products consisted of liquid formof bio-oil, char and gases. In beech wood bio-oil was formed to ca. 60% based on dry biomass weight and the yield of bio-oil was 49% in soft wood mixture. The moisture contents in both bio-oils were ranged between 17% and 22% and the bio-oil's density was measured to 1.2 kg/ ℓ.Bio-oils were composed of 45% carbon, 47% oxygen, 7% hydrogen and lower than 1% nitrogen,which was very similar to those of original biomass. In comparison with oils from fossil resources ,oxygen content was very high in bio-oils, while no sulfur was found. More than 90 low molecula rweight components, classified to aromatic and non aromatic compounds, were identified in bio-oils by gas chromatographic analysis, which amounted to 31 ∼3% based on the dry weight o fbio-oils.
Thermo-chemical Conversion of Poplar Wood (Populus alba × glandulosa) to Monomeric Sugars by Supercritical Water Treatment
Choe, Jun-Won ; Han, Gyu-Seong ; Choe, Don-Ha ; Im, Hyeon-Jin ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 44~50
To characterize thermo-chemical feature of su gar conversion of woody biomass poplar wood (Populus alba × glandulosa ) by sub- and supercritical water was treated for 60s under subcritica l－ 44 －1)초임계수에 의한 현사시나무의 당화 특성－ 45 －(23 MPa, 325 and 350oC) and supercritical (23 MPa, 380, 400, and 425oC) conditions, respectively. Among degradation products undegraded poplar wood solids existed in aqueous products. As th etreatment temperature increased, the degradation of poplar wood was enhanced and reached up to 83.1% at 425oC. The monomeric sugars derived from fibers of poplar wood by sub- and supercritical treatment were analyzed by high performance anionic exchange chromatography (HPAEC). Under the subcritical temperature rang es, xylan, main hemicellulose component in poplar wood, was preferentially degraded to xy lose, while cellulose degradation started at the transition zone between sub and supercritical conditions and was remarkably accelerated at the supercritical condition. The highest yield of monomeric sugars amounts to ca. 7.3% based on airdried wood weight (MC 10%) at 425oC.
Phenolic Compounds from Bark of Juglans mandshurica
Kim, Jin-Gyu ; Bae, Yeong-Su ; Sa, Jeon-Ryeong ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 51~60
Juglans mandshuric a barks were colected, extracted with acetone-H 2O (7:3, v/v), fractionatedwith n -hexane, CH 2Cl2, and EtOAc, and freeze dried to give some dark brown powder. The EtOA cand H 2O soluble fractions were chromatographe d on a Sephadex LH-20 column using H 2O-MeOH and EtOH-hexane mixture as eluents. Spectrometri c analysis such as NMR and MS, including TLC,were performed to characterize the structures of the isolated compounds. From the EtOAc andH2O soluble fractions, three flavanols (1 ∼3), three flavonols (4 ∼6) and five flavonol glycosides (7∼11) were isolated and elucidated.－ 51 －1)김진규사전령배영수－ 52 －
Chemical Constituents of Domestic Quercus spp. Leaves
Kim, Jin-Gyu ; Bae, Yeong-Su ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 61~71
This stud y was carried out to investigate chemotaxon omical correlation an d the chemical con-stituents of domestic Quercus sp. leaves. The leaves of Q. mongolica , Q. aliena , Q. serrata, Q. acutissima , Q. dentata and Q. variabilis were colected in the experimental forest of Kangwo nNational University. The combined extrac ts were successively fractionated with n -hexane, methyl -ene chloride and ethyl acetate using a separation funnel. A portion of the ethyl acetate and H 2O－ 61 －1)김진규배영수－ 62 －soluble materials of each species were chromato graphed on a Sephadex LH-20 column using vari-ous aqueous MeOH and EtOH-hexane as washing so lvents. Spectrometric analysis such as NMR and MS, including TLC, were performed to characterize the structures of the isolated compounds.Gallic acid, (+)-catechin, (-)-epicatechin, (+)-gallocatechin, kaempferol, astragalin, astragalin-6"- O- gallate, isoquercitrin, isoquercitrin-6"-O-gallate and myricetin were isolated from Q. mongolic a leaves. Gallic acid, kaempferol and quercetin were characterized from Q. acutissima leaves. Gali cacid, (+)-catechin, (-)-epicatechin, (+)-gallocatechin, (-)-epigallocatechin, kaempferol, quercetin, guajaverin and tamarixin were identified from Q. dentata leaves. Gallic acid, (+)-catechin, (-)-epicatechin, kaempferol, quercitrin, isoquercitrin and myricetin were purified from Q. serrataleaves. Gallic acid, (+)-catechin, astragalin, astragalin-6"-O-gallate and isoquercitrin were isolated from Q. variabilis leaves. Gallic acid was isolated from all the leaves and could be a taxonomicindex on Quercus spp..
Phenolic Compounds from Fallen Needle of Larix kaempferi Carr.
Gwon, Dong-Ju ; Bae, Yeong-Su ; Kim, Jin-Gyu ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 72~80
Fallen needle (8.5 kg) of Larix kaempferi were collected and extracted with 95% EtOH. The EtOH extracts were evaporated under reduced pr essure, concentrated, and successively fractio-nated with a series of hexane, methylene chloride, ethylacetate and water on a separatory fune lto be freeze dried. A portion of ethylacetate and water soluble powder were chromatographedon a Sephadex LH-20 column eluting with aqueous MeOH and EtOH-hexane mixture. Spectrometric analyses such as NMR and FAB-MS , including TLC, were performed on the sevenisolated compounds and were elucidated as (+)-catechin, (-)-epicatechin, 2 ″-O-rhamnosylvitexin, ju-－ 72 －1)일본잎갈나무 낙엽의 페놀성 화합물－ 73 －glanin, afzelin, laricitrin-3-O-β-D-glucop yranoside, iso quercitrin and cedrusin.
Supercritical Water Hydrolysis of Waste Logs after Oak Mushroom Production
Gu, Bon-Uk ; Choe, Don-Ha ; Choe, In-Gyu ; Lee, Jae-Won ; Choe, Jun-Won ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 81~95
Identification of Tricholoma matsutake in a Pine Root by ITS Region Amplification and RAPD Analysis with Different Mycorrhiza
Kim, Myeong-Gil ; Park, Won-Cheol ; Park, Hyeon ; Ga, Gang-Hyeon ; Yu, Seon-Hwa ; Son, Hui-Gyeong ;
Journal of the Korean Wood Science and Technology, volume 34, issue 6, 2006, Pages 96~103
A simple method for identif ying of ectom ycorrhizal fungi was presented, using the pol ymerase chain reaction (PCR) to amplify the ITS (Interna l transcribed spacer) regions of the nuclear ribo-sormal repeat. The sequences analyzed 6 species, Pisolithus tinctorius , Chroogomphus rutilus , Leucogyrophana pinastri , Suillus granulatus , Lactarius laeticolorus , and Suillus bovinus at hon-greung forest, and analysed 10 species, Craterellus lutescens , Thelephoroid mycorrhizal , Lactariu s － 96 －1)ITS 영역 증폭에 의한 소나무 송이균 뿌리 감염 확인 및 RAPD 에 의한 타 균근과의 비교－ 97 －quieticolo r, Tricholoma matsutak e, Lactarius chrysorrheu s, Sarcodon aspratu s, Russula versi -color , Suillus luteus , Tricholoma terreum , and Amanita vaginata at hongcheon forest. Finally, th eamplification by PCR with ITS1-ITS4 primers ofers god results over classical identification for ec -tomycorrhizal fungi species.