• 펄프종이기술
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• 제43권4호
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• pp.59-66
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• 2011

This study was carried out to develop the automation bark peeling process of paper mulberry for making Hanji. Nowadays, almost raw material has been imported from south-east asia for making Hanji. Raw material dependence is very high for Hanji-making by low productivity in korea. This study is focused on the resolution for problem of bark peeling automation. Water and sand jet of compressed air was possible bark peeling for black bast fiber. The effect of removing black bast fiber increased the longer the steaming time. Also using drum of bark peeling showed that results under temperature $80^{\circ}C$ and Rpm 50/min were best bark peeling and separating bast fiber from stem. The contents of holocellulose, lignin, ethanol-benzene extractives, and ash were 91.63~95.55%, 1.4~2.0%, 1.12~1.65%, and 1.4~4.3%, respectively. Chemical characteristics are similar between imported raw-material with drum bark.

• 농업생명과학연구
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• 제43권2호
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• pp.17-21
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• 2009

본 실험은 폐타이어칩이 심비디움 Pine Clash 'Moon Venus'의 생장 및 양분함량에 미치는 영향에 대해서 조사하였다. 잎, 줄기의 지상부 생장은폐타이어칩과 바크를 혼용한 경우에는 관행구인 바크와 차이가 없었다. 그러나 폐타이칩 단용구에서는 지상부의 생장이 현저하게 감소하였다. 총근수, 신근수, 근장 등 지하부의 생장도 지상부의 생장과 유사한 경향을 나타내었다. 부패근수는 폐타이어칩 중립과 대립의 단용구에서 증가하였다. 전당, 전분, 엽록소와 N, P, K 등 무기양분의 함량도 폐타이어칩과 바크를 혼용한 경우에는 관행구인 바크와 차이가 없었으나, 폐타이칩 단용구에서는 감소하였다.

• Natural Product Sciences
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• 제21권2호
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• pp.87-92
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• 2015

The stem barks, heartwoods, and leaves of Acer tegmentosum (Aceraceae) are widely used in Korea to treat hepatic or cerebral disorders mainly due to alcohol poisoning. This study was aimed to analyze phenolic substances in A. tegmentosum. Quantitative analysis of the three phenolic substances (salidroside, (+)-catechin and scopoletin) was performed by HPLC and the identification of volatile phenolic substances were done by GC-MS. The contents of the three compounds in the three MeOH extracts were higher in the stem bark (salidroside: 80.22 mg/g, (+)-catechin: 23.31 mg/g, and scopoletin: 9.45 mg/g) compared to the heartwoods and leaves. And GC-MS analysis of the stem bark extract demonstrated that p-tyrosol is a main substance of twenty-one compounds identified.

• 한국약용작물학회지
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• 제4권4호
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• pp.333-339
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• 1996

오갈피속 식물 5종(種)의 근피(根皮)와 가시 오갈피의 수점지역별, 채취시기별, 부위별(部位別) 및 재배지대별(地帶別)로 근피(根皮) 및 수피(樹皮)를 채취하여 표준품종(標準品種) 선발과 재배적지(栽培適地) 선정을 위한 기초자료를 얻고자 유효성분(有效成分) eleutheroside E의 함량을 비교분석(比較分析)한 결과는 다음과 같다. 1. 오갈피속 식물 근피(根皮)의 eleutheroside E 함량은 가시오갈피(0. 1925%) >지리오갈피(0.1103%) >서울오갈피 (0.691%) >섬오갈피(0,0348%) >당 오갈피(0.0236%) 순으로 가시오갈피가 타 오갈피 종(種)에 비해 훨씬 많았다. 2. 가시오갈피의 지역(地域) 수집종간(蒐集種間) 근피(根皮)의 eleutheroside E 함량은 덕유산 수집종 > 북해도 수집종 설악산 >수집종 순으로 많았다. 3. 가시오갈피의 채취시기별 eleutheroside E 함량은 여름보다 늦가을에 채취한것이 많았으며, 채취부위별로는 수피(樹皮)보다 근피(根皮)에서 월등히 많은 양(量)을 함유하고 있었다. 4. 가시오갈피의 재배지대별 eleutheroside E의 함량은 노고단(해발 1,450m) >운봉 (해발 4,50m) > 익산(해발 10m)순으로 많았으나, 가시오랄피의 생육(生育)은 운봉에서 가장 좋았다.

• Natural Product Sciences
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• 제12권4호
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• pp.241-246
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• 2006

Alstonia scholaris is known as 'Saptaparna' in Ayurvedic System of Medicines and the bark is used for the treatment of various diseases. It has various ethnomedicinal values as different traditional communities find diverse medicinal properties. The present communication deals with the seasonal variation studies of the stem bark of this plant. The bark was collected in the month of January, July and November. There is no macro-microscopical changes in all the three seasons but the ash values showed significant differences. Crude fibre content showed sharp decline from January to July to November. Total tannin percentage was found maximum in January and minimum in June. TLC finger print profile showed more concentration of constituents in January as compared to June and November. Hence, the bark may show more efficacy when collected in January.

• 농업생명과학연구
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• 제45권1호
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• pp.15-20
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• 2011

본 연구는 전북 무주지역 36년생 리기다소나무 임분을 대상으로 지상부 바이오매스 추정식을 개발하고, 줄기밀도와 바이오매스 확장계수를 산출하고자 하였다. 리기다소나무의 흉고직경을 독립변수로 하고 바이오매스를 종속변수로 하는 상대생장식을 추정한 결과, 잎 (78%)과 가지 (83%)를 제외하면 모든 부위에서 결정계수가 95% 이상의 높은 설명력을 나타냈다. 리기다소나무의 바이오매스량은 줄기 목질부 $65.9 Mg\;ha^{-1}$, 줄기 수피 $9.5Mg\;ha^{-1}$, 가지 $19.6Mg\;ha^{-1}$, 잎 $7.0Mg\;ha^{-1}$, 전체 $102Mg\;ha^{-1}$로 나타났으며, 바이오매스 구성비는 줄기목질부 (64.6%) > 가지 (19.2%) > 줄기 수피 (9.3%) > 잎 (6.9%) 순으로 나타났다. 리기다소나무의 줄기밀도 $(g/cm^{3})$는 0.453으로 나타났고, 바이오매스 확장계수는 1.344로 나타났다.

• Journal of the Korean Wood Science and Technology
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• 제52권2호
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• pp.134-144
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• 2024

This study aimed to analyze the anti-termite properties of tamanu (Calophyllum inophyllum L.) stem bark extracts against subterranean termites, specifically, Coptotermes curvignathus. The bark powder of C. inophyllum was extracted using different solvents, such as n-hexane, ethyl acetate, and methanol, using the maceration method. Anti-termite testing was performed using two paper disc methods: no- and two-choice tests. Whatman test paper was dripped with the extract solutions at concentrations of 4%, 6%, 8%, and 10% (w/v). Subsequently, the treated paper disc was placed into an acrylic tube, and the subterranean termite was added. The parameters utilized in the test included termite mortality and the weight loss of the test paper. The results revealed that the total extract yield of C. inophyllum stem bark was 30.24%. Furthermore, the extractive substances from C. inophyllum bark exhibited anti-termite activity. The most favorable outcomes were obtained with the n-hexane and ethyl acetate extracts at a concentration of 10%. The termite mortality and weight loss of the test paper were respectively 66% and 5.67% for the n-hexane extract and 66.67% and 6.19% for the ethyl acetate extract. In addition, the n-hexane extract contained friedelan-3-one, while the ethyl acetate extract contained 1,2-benzene dicarboxylic acid, dinonyl ester, and friedelan-3-one. The results suggested that these compounds are responsible for the observed anti-termite activity.

• BMB Reports
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• 제34권5호
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• pp.463-471
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• 2001

The bark of Ulmus darvidiana var. japonica Nakai (UDN) has been used for a long time to cure inflammation in oriental medicine. In the present study, two types of extracts, Ulmus water-eluted fraction (UWF) and Ulmus ethanol-eluted fraction (UEF), were prepared from the UDN stem bark, and employed to test the extracts to see if they had anti-oxidative properties against hydroxyl radicals that could alter immune reactivity in mouse immune cells. Deoxyribose assay, DNA nicking assay, and glucose/glucose oxidase assay showed that both fractions had scavenging activity against oxygen free radicals at 50 mg/ml. In addition, hydroxyl radical-mediated apoptosis in mouse thymocytes was not protected by UEF treatment, but the apoptosis was protected by UWF at the same concentration. DNA synthesis and cytokine production that were induced in splenocytes by mitogens (Concanavalin A and lipopolysaccharide) were reduced by the addition of both fractions. These results indicate that both extracts that were prepared from the UDN stem bark have anti-oxidative activities, anti-apoptotic effects, and inhibitory effects on DNA synthesis and cytokine production in mouse immune cell cultures.

• 한국산림과학회지
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• 제99권5호
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• pp.706-710
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• 2010

Understanding of chemical composition and energy contents in tree is important to develope strategies of renewable energy policy to cope with climate change. Residual biomass as renewable energy source was evaluated and focused on the bark-containing branches. Chemical analysis studies were conducted for different part of yellow poplar (Liriodendron tulipifera), which were partitioned to inner bark, outer bark, small branches, medium branches, big branches and trunk. The variations in hydrophobic extractives, hydrophilic extractives, lignin, carbohydrate compositions, energy contents (higher heating value) and the ash content were determined. The inner and outer bark had higher ash content, hydrophobic and hydrophilic extractives content, and higher energy content than those of tree trunk. Polysaccharides content in inner and outer bark was quite lower than those of stem or branches. Based on the energy content of residual biomass, replacement of fossil fuel and greenhouse gas emission abatement were calculated.

• Natural Product Sciences
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• 제13권3호
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• pp.190-194
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• 2007

Two new flavonoid compounds, 8,8'-bisbaicalein 1 and baicalein-7-O-caffeate 2 along with six known flavonoids, baicalein, chrysin, scutellarein, 6-hydroxyluteolin, 6-methoxyluteolin and baicalein-7-Oglucoside and ${\beta}-sitosterol$ have been isolated from the stem-bark of Oroxylum indicum (Bignoniaceae) and identified on the basis of spectroscopic and chemical studies. 6-Hydroxyluteolin and 6-methoxyluteolin are reported for the first time from this plant.