• 한국산림과학회지
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• 제50권1호
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• pp.1-4
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• 1980

한국(韓國)의 특산수종(特産樹種) 구상나무재(材)의 화학적(化学的) 조성분(組成分)을 분석조사(分析調査)하여 본바 그 결과(結果)를 요약(要約)하여 보면 아래와 같다. 1. 회분함량(灰分含量)의 범위(範囲)는 0.33~0.76%로서 평균(平均) 0.56%였다. 2. 냉수추출물(冷水抽出物)은 5.50~12.50% 범위(範囲)의 함량치(含量値)를 보였는데 평균(平均) 8.76%였다. 3. 열수추출물(熱水抽出物)은 4.80~13.65%로서 평균(平均) 10.16%의 함량치(含量値)를 보였다. 4. 염기추출물(塩基抽出物)은 최소(最少) 5.51%에서 최고(最高) 25.44%의 함량치(含量値)를 보였는데 평균(平均) 4.23%였다. 5. Alcohol-Benzol 추출물(抽出物)은 2.94~5.44%로서 평균(平均) 4.23%였다. 6. Holocellulose 함량(含量)은 73.68%에서 79.10%의 정량치(定量値)를 보였는데 평균(平均) 76.49%였다. 7. Cellulose 함량치(含量値)는 평균(平均) 56.30%로서 46.02~61.33%의 범위(範囲)였고 이중(中) ${\alpha}$-Cellulose가 78.34%, ${\beta}$-Cellulose가 7.66%, ${\gamma}$-Cellulose가 14.04%였다. 8. Klason lignin의 함량치(含量値)는 평균(平均) 25.30%로서 22.50~27.00% 의 범위(範囲)였다. 9. Pentosan 함량(含量)은 7.90~13.66%의 정량치(定量値)를 보였는데 평균(平均) 10.44%였다. 이상(以上)의 결과(結果)를 종합(綜合)하면 회분함량(灰分含量)과 각추출물(各抽出物)의 함량(含量)은 대체(大体)로 타쇠업수재(他釙業樹材)와 비슷하였고 Holl cellulose 함량(含量)은 76.49%로서 잣나무재(材)에서 보다 정량치(定量値)가 높고 소나무재(材)와는 비슷하였으며 특(特)히 Cellulose 함량 56.30% 중(中) 78.34%의 높은 ${\alpha}$-Cellulose 함량율(含量率)을 보여 우수(優秀)한 Pulp화학(化學) 공업재료(工業材料)인 것으로 사료(思料)된다.

• Nutritional Sciences
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• 제9권4호
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• pp.330-334
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• 2006

Chemical composition of the Eucommia ulmoides bark, including extractives, proximate, mineral, fatty acid and monosaccharide compositions, was studied The most abundant mineral was calcium (533.17 mg/l00 g). $\alpha-linolenic$ acid (24.7%) and linoleic acid (24.3%), showed higher contents among the fatty acids. Major monosaccharides of E. ulmoides balk were arabinose (13.94 mg/g), xylose (18.91 mg/g) and glucose (119.7 mg/g). From the bark of E ulmoides, four compounds were isolated and their structures were elucidated as caffeic acid (I), kaempferol (II), quercetin (III) and isoquercitrin (IV) by spectroscopic analysis such as NMR and MS, including cellulose TLC and other chemical evidence such as hydrolyzation and acetylation. The antioxidant activities of four isolated compounds were evaluated by DPPH free radical scavenging, hydroxyl scavenging and reducing power assays. The results indicated that all the isolated compounds showed higher DPPH radical scavenging activity than $\alpha-tocopherol$ and BHT that were used as positive controls and these four compounds exhibited considerable reducing power and hydroxyl radical (OH) scavenging activity. Considering from the results above, it suggests that the E. ulmoides bark is a potential natural source of antioxidant material.

• Journal of the Korean Wood Science and Technology
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• 제44권4호
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• pp.571-588
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• 2016

Eucalyptus pellita F. Muell is one of pulp woods that is being developed through breeding plantation programs in Indonesia. The research aimed at exploring the chemical and morphological characteristics of fiber, and to determine the rank of plus trees from 4 provenances based on the suitability for pulps. The materials included the plus trees of E. pellita (9 years) from the 2nd generation of progeny tests in Pelaihari, South Borneo. Wood properties under investigation included the chemical properties and morphological fiber characteristics (fiber dimensions and its derived properties). In the present study, data were analyzed using descriptive statistic, Analytic Hierarchy Process (AHP) and Pearson's correlation. Results showed that the chemical properties of E. pellita, i.e. the contents of ethanol-toluene extractives, hot water soluble extractives, holocellulose, alphacelullose, and lignin were $3.08{\pm}1.00%$, $1.41{\pm}0.38%$, $75.26{\pm}2.58%$, $49.02{\pm}2.88%$, and $29.49{\pm}1.86%$, respectively. The average values of wood fiber morphology were $1.02{\pm}0.08$ mm (fiber length), $13.25{\pm}1.64{\mu}m$ (fiber diameter), of $6.94{\pm}1.70{\mu}m$ (lumen diameter), $3.15{\pm}0.52{\mu}m$ (fiber wall thickness), $0.97{\pm}0.30$ (Runkel ratio), $0.57{\pm}0.10$ (Luce's shape factor), $78.21{\pm}10.34$ (slenderness ratio) and $130.91{\pm}33.77{\times}10^3{\mu}m^3$ (solids factor). The AHP scoring rank indicated that the best individuals were 28.4.3.28 (Kiriwo Utara), 12.1.5.28 (North Kiriwo), 19.11.5.45 (Serisa Village), 3.8.4.9 (South Kiriwo), and 6.6.3.15 (South Kiriwo). Pearson correlation analysis showed significant correlations between the levels of fiber length with alpha-cellulose content (r = 0.39) as well as the fiber length with ethanol-toluene extractive contents (r = -0.41).