• 한국산림과학회지
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• 제80권3호
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• pp.279-286
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• 1991

본(本) 연구는 우리나라 도심지역(都心地域)과 외곽지역(外廓地域)의 산림에서 자라고 있는 수목을 대상으로 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)과 수피(樹皮) 산도(酸度)(pH)를 측정함으로써, 도심지역(都心地域)의 오염상태(汚染狀態)를 진단하고 이러한 측정 방법이 대기오염(大氣汚染)의 생물학적(生物學的) 지표(指標)로서 적합(適合)한가를 구명하였다. 조사대상지는 오염지역(汚染地域)(서울의 남산(南山), 곽악산(冠岳山), 북한산(北漢山), 수원(水原)의 팔달산(八達山)과 비오염지역(非汚染地域)(강원도(江原道) 평창(平昌))으로 나누어 선정하였고 공시수종으로는 소나무 (Pinus densiflora S. et Z.)와 신갈나무 (Quercus mongolica Fisch.)를 선택하였다. 시료의 채취는 생육시기별로 나누어 1990년 5월, 8월, 10월에 3회 실시하였으며, 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)을 $BaSO_4$ 중량법(重量法)으로 측정하고 수피산도(樹皮酸度)를 pH meter로 측정하였다. 대기중(大氣中) 아황산(亞黃酸)가스 농도(農度)는 도시의 경우 1990년도 환경처 발표자료를, 평창의 경우는 임업연원의 자료를 이용하였다. 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)은 대기중(大氣中) 아황산(亞黃酸)가스 농도(農度)가 증가(增加)할수록 증가하였는데(상관계수(相關係數) 0.52), 남산(南山)지역에서 소나무와 신갈나무가 각각 0.170%와 0.081%의 함량(含量)을 나타내어 비오염지역(非汚染地域)인 평창(平昌)(소나무 0.023%, 신갈 0.034%)에 비해 상당히 높았다. 수피산도(樹皮酸度)(pH)는 대기중(大氣中) 아황산(亞黃酸)가스 농도(農度)가 증가할수록 낮은 pH를 보였는데 상관계수(相關係數 -0.52), 남산(南山)지역에서 소나무와 신갈나무에서 각각 pH 3.42과 3.63을 나타내어 평창의 pH 3.94와 4.93에 비해 훨씬 낮은 수치를 보였다. 시간별(時期別) 조사(調査)에서는 8월이 5월과 10월에 비하여 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)이 더 낮고, 수피(樹皮)의 pH는 더 높은 값을 나타냈는데, 이는 6-8월 기간중의 많은 강우량(降雨量)에 의하여 대기(大氣)가 정화(淨化)되었기 때문으로 사료된다. 소나무와 신갈나무의 수종간(樹種間) 비교에서는 오염지역(汚染地域)에서는 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)과 수피(樹皮)의 pH 모두에서 유의차를 보이지 않았지만, 비오염지역(非汚染地域)의 수피(樹皮) 산도(酸度)(pH)에서는 신갈나무가 고유의 특성으로 인하여 소나무에 비해서 수피의 pH가 높고, 대기오염(大氣汚梁)에 따라서 소나무 수피보다 더 큰 변화를 나타냈다. 따라서 엽중(葉中) 수용성(水溶性) 유황(硫黃) 함량(含量)과 樹皮嚴度(pH) 는 대기오염(大氣汚梁)의 생물학적(生物學的) 지표(指標)로 사용할 수 있으며, 특히 수피산도(樹皮酸度)는 측정 방법이 간편하면서도 대기오염(大氣汚梁)에 더 민감(敏感)한 지표(指標)라고 결론(結論) 짓는다.

• 생약학회지
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• 제35권4호통권139호
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• pp.288-292
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• 2004

To evaluate the quality of the crude drugs using three kinds of Cinnamomum Cortex (CC), Vietnamese CC (VCC, the stem bark of Cinnamomum obtusifolium), periderm-peeled Chinese CC (PPCC, periderm-peeled stem bark of C. cassia), Chinese CC (CCC, stem bark of C. cassia) and a Cinnamomi Ramulus (CR, the twig of C. cassia), the four essential oils were prepared by steam distillation method. Cinnamaldehdye (CAN) and an unknown substance tentatively named hydroxy-cinnamaldehdye(HCNA) were detected in the four essential oils by gas chromatography-mass spectrometry, the contents of which are significantly different one another. Vietnamese CC had the highest content of HCNA whereas CR had the highest CAN content and the lowest HCNA. Vietnamese CC exhibited the greatest cytotoxic activity against the cancer cell lines, A549, HepG-2, HL-60, P-388, U-937, and KB and CR the lowest cytotoxicity. Contents of CAN and HCNA in CCC and PPCC are positioned between VCC and CR. These results suggest that measurement of HCNA and cytotoxicity may determine the quality of CC and CR.

• Biomolecules & Therapeutics
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• 제16권3호
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• pp.270-276
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• 2008

In this study we investigated the effects of Magnolia Bark (MB) extract and its constituents, such as honokiol and magnolol, on gastritis in rats and the growth of human gastric cancer cells. The MB extract, honokiol, and magnolol showed the acid-neutralizing capacities, the antioxidant activities, and the inhibitory effect on the growth of Helicobacter pylori (H. pylori.) at the dose of $50\;{\mu}g/ml$ and over, which is equivalent to that of ampicillin ($100\;{\mu}g/ml$). Honokiol and magnolol had no significant cytotoxicity to human gastric caner cells (AGS and SNU638). However, the MB extract had cytotoxic activity against AGS gastric cancer cell. The MB extract, honokiol, and magnolol significantly inhibited HCI-ethanol-induced gastric lesions without clear change of mucus content. In pylorus ligated rats, honokiol significantly decreased the volume of gastric secretion and gastric acid output, and increased the pH. Magnolol increased the mucus content to almost the same as the control group at oral doses of 50 mg/kg. Therefore, we could guess that antigastritic action of honokiol and magnolol may be associated with the antioxidant activities, acid-neutralizing capacities, inhibition of secretion in gastric acid, and anti-H. pylori action. From these results, we could suggest that MB extract and its constituents, such as honokiol and magnolol, may be useful for the treatment and/or protection of gastritis.

• 동아시아식생활학회지
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• 제27권5호
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• pp.548-557
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• 2017

This study investigated the effects of insoluble dietary fibers from pine (Pinus radiata D. Don) inner bark powder (PIBP) on loperamide constipation in rats. Male Sprague-Dawley rats were administered PIBP in their diets at concentrations of 5% and 10% for 4 weeks. Rats were divided in to four groups, normal diet group (Cont), a normal diet and loperamide group (Lop), 5% PIBP experimental diet and loperamide group (Lop+PIBP 5%), and 10% PIBP experimental diet and loperamide group (Lop+PIBP 10%). Constipation was induced by oral administration of loperamide (2 mg/kg, twice per day) for the last three days of the experiment. Food intake, body weight, properties of feces, gastrointestinal transit time, and serum lipid profiles were measured. When compared with the normal diet and loperamide group (Lop), there were increases in fecal pellet number (p<0.05), wet weight (p<0.001), and water content (p<0.001). Positive results were derived from relevant indicators to improve constipation. In addition, the number of fecal pellets in the colon was not significant, and decreased as PIBP content increased. PIBP had a concentration-dependent effect on reduction of total cholesterol, LDL-cholesterol, and triglycerides and elevation of HDL-cholesterol. These results indicate that PIBP may effectively prevent constipation.

• 한국약용작물학회지
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• 제17권2호
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• pp.115-120
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• 2009

To obtain the information on antioxidant activity by harvesting parts and time in Cudrania tricuspidata Bureau, total phenolic contents, flavonoid contents, superoxide dismutase (SOD) like activity and 2,2-diphenyl-1-picrylhydrazyl(DPPH) radical scavenging activity of methanol extracts from Cudrania tricuspidata were investigated. Total phenolic contents was the highest in leaf [$30.2{\sim}38.8\;mg/g$ dry weight (DW)] and followed by root bark, stem bark, fruit, root except bark and stem except bark. Among harvesting time, total phenolic contents of leaf was the highest as $38.1{\sim}38.8\;mg/g$ DW in May and June, and then decreased to October. Root bark harvested in April and May contained $26.6{\sim}27.8\;mg/g$ DW total phenolic compounds and total phenolic content fell to a very low values at 1.8 mg/g DW in February. Flavonoid contents was very high in leaf and root bark. Especially, root bark harvested in April had the highest of flavonoid contents as 23.2 mg/g DW. As a result of simple linear regression analysis of total phenolic contents on flavonoid contents according to harvesting parts, it showed a high correlation (p < 0.001) with $0.57{\sim}0.97\;R^2$ (coefficient of determination). As $RC_{50}$ value, that was, the concentration of sample required for 50% reduction of DPPH absorbance, was $13.7{\sim}20.5\;{\mu}g/mL$ in leaf so DPPH radical scavenging activity was very high. But SOD like activity of $1,000\;{\mu}g$ extract/mL MeOH was a low value of $0.3{\sim}9.2%$ in all samples.

• 한국식품영양학회지
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• 제25권3호
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• pp.430-435
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• 2012

본 연구에서는 지역별 옻나무 껍질의 총 폴리테놀 함량, 플라보노이드 함량, 항산화능과 우루시올 함량을 측정하고, 옻나무 피를 첨가한 옻닭 국물의 관능검사를 실시하였다. 원주산 옻나무 껍질의 total polyphenol, flavonoids, DPPH free radical 소거능, ABTS radical scavenging activity 등이 함양산 및 중국산에 비해 높은 수치를 나타내었다. Urushiol 함량은 함양산이 $4.59{\pm}0.04$ ppm으로 가장 높은 함량을 나타내었지만, 중국산 옻나무 껍질에서는 검출되지 않았다. 옻나무 껍질을 첨가한 옻닭 국물의 관능검사에서는 원주산을 첨가한 옻닭국물의 선호도가 가장 높은 것으로 나타났다.

• Journal of Applied Biological Chemistry
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• 제66권
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• pp.153-158
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• 2023

Pinus species are native to the Northern Hemisphere and some parts of the tropics to temperate regions in the Southern Hemisphere. They were used as food and medicine in prehistoric times. Massonianoside B is a compound found in pine trees and possesses antioxidant activity. In order to determine the presence and content of this compound in Pinus species, three different parts (needles, branches, and bark) of three Pinus species were extracted and investigated. High-performance liquid chromatography with a gradient elution system along with a reverse-phase INNO column with photodiode array detector was employed. Results showed that the branches of the three Pinus species had higher massonianoside B content (5.502 to 9.751 mg/g DW) than either the needles or bark. Furthermore, among the three species, P. rigida × P. taeda had the highest concentration of total massonianoside B (11.557 mg/g DW). These findings thus provide evidence of biological activity in Pinus species and establish a foundation for further research.

• Journal of the Korean Wood Science and Technology
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• 제44권6호
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• pp.828-841
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• 2016

Relatively little information is available regarding the correlation between wood and veneer quality, especially for Samama wood, an endemic wood species in eastern Indonesia. This study addresses the quality of 8 years old Samama wood and its effect on the veneer quality. Samama wood quality was determined by evaluating its specific gravity, moisture content, fiber dimensions, and microfibril angle from pith toward bark. Meanwhile, veneer quality was assessed by examining veneer thickness and lathe check characteristics. Geometry factor model was constructed to elaborate the quantities of lathe check from pith toward bark. Results show that fair variations of veneer thickness, ranging from 1.5 mm to 3.0 mm, could be obtained from Samama wood. The quantity, depth, and length of lathe check were noticeably decreasing toward bark. Further, in the same manufacturing process, geometry factor was determined as the dominant factor over other wood properties in affecting the frequency of lathe checks from pith towards bark. These facts should be put into consideration in producing veneer from Samama wood. Moreover, these results enlighten the potential of Samama wood as plywood and other excellent veneer-based products.

• Journal of the Korean Wood Science and Technology
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• 제28권1호
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• pp.1-17
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• 2000

황철나무와 양황철나무는 전형적인 다습심재(wetwood)로써, 심재 전체가 변재보다 높은 함수유를 나타냈다. 황철나무와 양황철나무의 목부중에 존재하는 결정은 주로 심재중에서도 일부연룬을 따라 또는 착색얼룩을 따라 또는 국소에 집중하여, 수에 가까울수록 많았다. 또한 1연륜 내에서는 만재보다 조재에 많은 경향이 있었다. 심재에서의 결정은 전 종류의 세포에 존재하였으나, 대부분의 결정은 도관과 섬유상가도관에 존재하였다. 수피중에 있는 결정은 내수피에서 외수피까지 비교적 산재하여 존재했다. 양황철나무에서는 잎옹이의 출현빈도가 높았으나 황철나무에서는 그 출현 빈도가 낮았다.

• 약학회지
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• 제37권6호
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• pp.581-590
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• 1993

In a preliminary screening of the plant extracts for the antigastritic action in rats, the extract of Aralia elata(Araliaceae) showed positive activity in HCI plus ethanol induced gastric lesion. Systematic fractions with hexane, chloroform, ethyl acetate and butanol resulted in the most patent activity with the butanol fraction: This butanol fraction at the oral dose of 200 mg/kg exhibited significant inhibition of absolute alcohol induced gastric lesion which was more potent than 100 mg/kg of cimetidine and had significant stimulation of mucus secretion. The butanol fraction showed significant decreases in the ulcer indices of Shay ulcers and inhibition of gastric juice secretion with acid output in pylorus-ligated stomachs of rats. It also suppressed the acetic acid induced gastric ulcer. These results might suggest that the butanol fraction had inhibitory action in gastric lesion and ulceration through inhibition of gastric acid secretion and stimulation of mucin secretion in the stomachs of rats.