• 펄프종이기술
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• 제45권6호
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• pp.72-77
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• 2013

Tissue and paper manufacturing companies have common problems with increasing cost of imported virgin pulp and the restriction of using woods in the forest. Possibility of using bagasse pulp for solving those problems was studied. In order to reduce the production cost and study the dependency on pulps, bagasse pulp has been studied for mixing with Sw-BKP and Hw-BKP. Optimum blending ratio of wood pulps and bagasse pulp to enhance tissue properties were analyzed. Various properties of the hand sheet after blending of wood pulp and bagasse pulp were measured. As results, the bagasse pulp could substitute the hard wood pulp with similar properties of tissue. Therefore, we judged that the bagasse pulp was suitable for replacement of the hardwood pulp.

• Journal of Applied Biological Chemistry
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• 제51권3호
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• pp.83-87
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• 2008

Tension wood, a specialized tissue developed in the upper side of the leaning stem and drooping branches of angiosperm, is an attractive experimental system attractive for exploring the development and the biochemical pathways of the secondary cell wall formation, as well as the control mechanism of the carbon flux into lignin, cellulose, and hemicellulose. However, the mechanism underlying the induction and the development of the tension wood is largely unknown. Recently, several researchers suggested the possible roles of the plant growth hormones including auxin, gibberellin, and ethylene mainly based on the expression pattern of the genes in this specialized tissue. In addition, expressed sequence tag of Poplar and Eucalyptus provide global view of the genetic control underlying the tension wood formation. However, the roles of the majority of the identified genes have not yet been clearly elucidated. The present review summarized current knowledge on the biosynthesis of tension wood to provide a brief synopsis of the molecular mechanism underlying the development of the tension wood.

• Archives of Plastic Surgery
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• 제41권2호
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• pp.126-132
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• 2014

Background Extensive degloving injuries of the extremities usually result in necrosis of the flap, necessitating comprehensive skin grafting. Provided there is a sufficient tool to evaluate flap viability, full-thickness skin can be used from a nonviable avulsed flap. We used a Wood's lamp to determine the viability of avulsed flaps in the operation field after intravenous injection of fluorescein dye. Methods We experienced 13 cases during 16 months. Fifteen minutes after the intravenous injection of fluorescein dye, the avulsed skin flaps were examined and non-fluorescent areas were marked under Wood's lamp illumination. The marked area was defatted for full-thickness skin grafting. The fluorescent areas were sutured directly without tension. The non-fluorescent areas were covered by defatted skin. Several days later, there was soft tissue necrosis within the flap area. We measured necrotic area and revised the flap. Results Among all the cases, necrotic area was 21.3% of the total avulsed area. However, if we exclude three cases, one of a carelessly managed patient and two cases of the flaps were inappropriately applied, good results were obtained, with a necrotic area of only 8.4%. Eight patients needed split-thickness skin grafts, and heel pad reconstruction was performed with free flap. Conclusions A full-thickness skin graft from an avulsed flap is a good method for addressing aesthetic concerns without producing donor site morbidity. Fluorescein dye is a useful, simple, and cost-effective tool for evaluating flap viability. Avulsed flap injuries can be managed well with Wood's lamp illumination and a full-thickness skin graft.

• 한국전자현미경학회:학술대회논문집
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• 한국현미경학회 2007년도 제38차 춘계학술대회 초록집
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• pp.49-50
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• 2007

• 펄프종이기술
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• 제37권1호
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• pp.53-60
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• 2005

The mechanical properties of deinked mixed office waste paper in relation to sorts and dosage of enzymes were investigated for successful enzymatic deinking of mixed office waste paper. The increasing of $\Delta$. freeness was most predominant in pulp of Denimax treated pulp. The tensile and burst properties are decreased with enzyme dosage while $\Delta$. freeness were increased. The fine content in disintegrated pulp was decreased with enzyme dosage of $0.4\%$ on the dried weight of paper. The water absorption of handsheets of enzyme deinked pulp was like as that of market roll tissue papers and the mechanical properties of handsheets of enzyme deinked pulp were improved with enzyme treatment comparing of market roll tissue papers.

• Journal of the Korean Wood Science and Technology
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• 제39권1호
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• pp.28-32
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• 2011

This research was carried out to examine the ultrasonic properties of $Phyllostachys$ $bambusoids$ Sieb et Zucc depending on three directions for providing the fundamental properties of the Korea traditional flute, Daekeum. The ultrasonic properties of $Phyllostachys$ $bambusoids$ Sieb. et Zucc were found to be different from those of wood, because of the distinctive anatomical structure of bamboo tissue. The ultrasonic velocity of peripheral zone showed higher values of all three directions. The ratio of longitudinal velocities to perpendicular velocities showed 1.16 at peripheral zone, 1.70 at central zone, 1.38 at inner zone respectively. The ratio of radial velocities to tangential velocities were measured as 1.286 at peripheral zone, 1.325 at central zone, 0.829 at inner zone respectively.

• Journal of the Korean Wood Science and Technology
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• 제26권3호
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• pp.100-107
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• 1998

Methanol extracts of five Berberidaceae species were examined against tissue factor inhibitory and tumour cell growth inhibitory activity. Methanol extracts of Berberis koreana Palibin showed a strong cytotoxicity activity against SK-MEL-2 (Melanoma) tumour cell lines with more than 90% in $25{\mu}g/m\ell$ and against A549 (Lung carcinoma), SK-OV-3 (Ovarian cancer), XF498 (CNS cancer) and HCTl5 (Colon cancer), other Berberidaceae species except B. koreana species have no effect on the tumour cells. Biologically active compound, therefore, was isolated through the activity guided fractionation and purification. The structure was confirmed by NMR. FT-IR and MS to 2-(3,4-dihydroxybenzyl)-ethyl alcohol. It showed cytotoxicity activity against SNU-C4 tumour cell lines with 50.7% in $50{\mu}g/m\ell$. Methanol extracts of 5 Berberidacae species have no effect on the tissue factor inhibitory activity.

• Journal of the Korean Wood Science and Technology
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• 제26권4호
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• pp.61-70
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• 1998

Xylem, bark and flower buds of Magnolia kobus DC. var. borealis Sarg. were extracted with ethanol. And then the ethanol extracts were fractionated with diethyl ether. The lignans structure of the diethyl ether fractions were determined by spectroscopic methods. The results are summarized as follows : 1. Three compounds, aschantinn(X-I), yangambin(X-II), (-)syringaresinol(X-III), tetrahydrofurofuranoid lignans were isolated from the xylem. 2. Five compounds were isolated from the bark. These are all tetrahydrofurofuranoid lignans, aschantin(B-I), yangambin(B-II), medioresinol(B-III), (+)syringaresinol(B-IV), and tetrahydrofuranoid, kobusinol B(B-V). 3. Three tetrahydrofurofuranoid lignans, kobusin(F-I), aschantin(F-II), yangambin(F-III) were isolated from the flower buds. 4. Isolated lignans from the each tissue were two types of tetrahydrofurofuran type and tetrahydrofuran type. 5. The tetrahydrofurofuranoid lignans were five compounds such as kobusin, aschantin, yangambin, medioresinol, and syringaresinol, while the tetrahydrofuranoid lignans was kobusinol B. 6. Most of these lignans were substituted with the methylenedioxy or methoxyl groups.

• 한국산림과학회지
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• 제78권3호
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• pp.287-301
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• 1989

가죽나무(Ailanthus altissima Swingle) 수간(樹幹)의 지상고(地上高) 180cm 부위(部位)에 19mm 너비의 플라스틱 밴드를 결체(結締)하여 1년간(年間) 방치(放置)한 후 이 밴드를 解締)하여 주므로써 수간(樹幹)을 둘러싸는 원반형태(圓盤形態)의 과대(過太)한 비대생장(肥大生長) 조직(組織)인 종양상조직(腫瘍狀組織)(tumorous tissue)이 형성(形成)되고 이러한 종양상조직(腫瘍狀組織)의 원반(圓盤)과 상하(上下)에 위치(位置)한 정상형태(正常形態)의 원반원반(圓盤)을 채취(採取)하여 해부학적(解剖學的) 차이(差異)를 구성세포(構成細胞)의 특성(特性)면에서 조사(調査), 비교(比較)하였다. 종양상(腫瘍狀) 부위(部位)에서는 상이적(異常的)으로 넓은 연륜폭(年輪幅)을 지니는 종양재(腫瘍材)(tumor wood)가 밴드 해체(解締)다음 해인 제(第)3연륜(年輪)에서 형성(形成)되었으며 밴드 결체기간(結締其間)중에 생장(生長)한 제(第)2연륜(年輪)에서는 내부(內部)로 발달(發達)된 변색재(變色材)(discolored wood)와 외부(外部)로 발달(發達)한 정상색(正常色)의 재(材)를 구분하는 방어대(防禦帶)(barrier zone)가 형성(形成)되어 있었으며 이종양상(腫瘍狀) 부위(部位) 의 상하(上下) 위치(位置)한한 정상형태(正常形態)의 부위(部位)에서는 정상재색(正常材色)을 나타내는 제(第)2연륜내(年輪內)에 방어대(防禦帶)에 해당하는 위연륜상대(僞年輪狀帶)(false ring-like zοnes)가 형성(形成)되어 있었다. 종양상(腫瘍狀) 부위(部位)에 있어서 종양재(腫瘍材)인 제(第)3연륜(年輪)과 방어대(防禦帶)후에 발달(發達)한 제(第)2연륜부분(年輪部分)은 불규칙(不規則)한 연륜계(年輪界), 길이가 짧으며 비정상적(非正常的)인 형태(形態)를 나타내는 목섬유(木纖維) 및 도관요소(導管要素), 높이와 폭이 큰 방사조직(放射組織)을 다진다는 면에서 서로 유사(類似)하였다. 그리고 종양재(腫瘍材)인 제(第)3연륜(年輪)의 춘재부(春材部) 관공(管孔)의 직경(直徑)은 상하(上下) 정상부위(正常部位)의 제(第)3연륜(年輪)것보다 작은 것으로 나타났으며 방어대(防禦帶)후에 형성(形成)된 제(第)2연륜(年輪) 부분(部分)의 추재부(秋材部) 고립관공(孤立管孔) 및 복합관공(複合管孔)을 구성하는 개개의 관공(管孔)은 방사직경(放射直徑)이 접선직경(接線直徑)보다 더 큰 특성(特性)을 나타낸 반면 종양재(腫瘍材)에서는 직경(直徑)이 거의 유사한 성향을 나타내었다. 또한 종양상(腫瘍狀) 부위(部位)에 있어서는 방어대(防禦帶)후에 형성(形成)된 제(第)2연류부분(年輪部分)에서만 방사조직밀도(放射組織密度)가 크게 증가한 특성(特性)이 관찰되었다. 종양재(腫瘍材)인 제(第)3연륜(年輪)의 목섬유(木纖維) 직경(直徑)은 상하(上下) 정상부위(正常部位)의 제(第)3연륜(年輪)것과 거의 차이를 나타내지 않으므로 과대한 비대생장조직(肥大生長組織)인 종양재(腫瘍材)는 세포(細胞)의 크기에 의해서가 아니라 세포수(細胞數)의 증가(增加)에 의해 형성(形成) 되었음을 알 수 있었다.

• 한국산림과학회지
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• 제112권4호
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• pp.554-560
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• 2023

불법 목재 유통을 막기 위해 DNA를 활용한 수종 및 원산지 식별이 이루어지고 있지만, 목재의 물리·화학적 특성 때문에 양질의 DNA를 얻기 어렵다. 본 연구에서는 목재 DNA 추출 수율과 polymerase chain reaction (PCR) 성공률에 목재 조직의 나이가 영향을 미치는지 알아보기 위하여, 국내 주요 수종인 소나무 원목에서 DNA를 추출하여, 목재의 나이테 생성 시기와 추출 DNA 농도(ng/μl) 및 순도(A260/A280) 그리고 PCR 성공률(%)의 관계를 확인하였다. 분석 결과, 나이테가 형성층으로부터 멀어질수록, 즉 오래 전에 생성된 목재일수록, 추출한 DNA의 농도와 순도는 유의하게 감소하였다. 증폭 길이가 짧은 trnM-trnV(285 bp) 영역과 rpoC1(298 bp) 영역의 경우 PCR 증폭 성공률이 100 %였으나, rbcL(1.3 kb) 영역의 경우 66.67 %였고 30년보다 오래된 조직에서는 모두 증폭에 실패하였다. 시간이 지남에 따라 목재 세포의 사멸과 함께 양질의 DNA가 파괴되어 DNA 농도, 순도, PCR 성공률이 감소한 것으로 판단된다. 본 연구 결과는 향후 목재를 활용한 수종 동정 등에 유용하게 활용될 것으로 기대된다.