• 생태와환경
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• 제46권2호
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• pp.234-240
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• 2013

$CO_2$ 농도 증가에 의한 지구온난화는 식물의 생장과 발달에 영향을 미친다. 이에 우리나라의 우점종인 소나무, 가로수로 많이 쓰이는 은행나무 그리고 난대림의 우점종인 종가시나무와 멸종위기 식물로 지정된 개가시나무, 미선나무의 유식물을 대상으로 $CO_2$ 농도와 온도증가를 증가시킨 지구온난화 처리구와 대조구로 나누어 실험을 하였다. 2010년 4월부터 2011년 11월까지 지상부 길이와 잎 수를 측정하였다. 그 결과 소나무, 은행나무 그리고 종가시나무의 지상부 생장량은 대조구와 지구온난화 처리구에서 차이가 없었다. 개가시나무와 미선나무의 지상부생장량은 대조구보다 처리구에서 높았으나, 잎 수는 $CO_2$ 농도와 온도증가에 의해 영향을 받지 않았다. 이상으로 볼 때, 지구온난화 조건이 되면 우점하고 있는 소나무, 은행나무, 종가시나무보다 멸종위기식물인 미선나무와 개가시나무의 지상부 생장에 유리할 것이다.

• 한국산림과학회지
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• 제111권4호
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• pp.502-510
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• 2022

국가 온실가스 인벤토리 항목 중 정주지는 활동자료 부족 등의 이유로 보고되지 않고 있다. 이에 본 연구는 정주지 수목의 탄소저장량 추정에 필요한 기초자료로서 원주시 가로수 4수종(메타세쿼이아, 살구나무, 은행나무, 중국단풍)의 상대생장식을 개발하였다. 레이저 덴드로미터를 이용하여 수종별로 30본씩 비파괴적인 수간석해를 진행하였다. 이후 5개 모델의 지상부 재적 상대생장식과 수관면적을 독립변수로 한 흉고직경 상대생장식을 개발하였다. 가장 적합도가 높은 식으로 메타세쿼이아와 은행나무에서 aD²+bD+c, 살구나무에서 aD+bD², 중국단풍에서 a+bD² 식을 선정하였다. 수관면적을 독립변수로 한 흉고직경 상대생장식에서는 은행나무와 중국단풍에서 결정계수가 0.364 이하로 낮게 나타났으며 메타세쿼이아와 살구나무는 0.767 이상으로 높게 나타났다. 이는 가로수 관리에 따른 차이라고 판단되며 수관면적을 이용한 재적의 추정은 자연수형을 유지하는 수종에 사용 가능할 것으로 사료된다. 본 연구는 정주지 탄소흡수량을 측정하기 위한 기초자료로 사용될 수 있으며 도시림 관리에 의한 수목의 변화를 모니터링하는데 사용될 수 있다.

• 한국응용과학기술학회지
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• 제14권1호
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• pp.61-76
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• 1997

Triacylglycerols of the seeds of Ginkgo biloba have been resolved by high-performace liquid chromatography(HPLC} in the silver-ion and reverse-phase modes. The fatty acids were identified by a combination of capillary gas chromatography and gas-chromatography /mass spectrometry as the methyl and /or picolinyl ester. The main components are $C_{18:2{\omega}6}$(39.0mol%), $C_{18:1{\omega}7}$(asclepic acid 21.5mol%), and $C_{18:1{\omega}9}$(oleic acid, 13.8mol%). Considerable amounts of unusual acid such as $C_{20:3{\Delta}^{5,11,14}$ (5.7mol%), $C_{18:2{\Delta}^{5,9}$(2.8mol%), and $C_{18:3}{\Delta}^{5,9,12}$(1.6mol%), were checked. In addition, an anteiso-branched fatty acid, 14-methylhexadecanoic acid, was also present as a minor component(0.9 mol%). The triacylglycerols were separated into 17 fractions by reverse-phase HPLC, and the fractionation was achieved according to the partition numnber(PN) in which a ${\Delta}^5$-non methylene interrupted double bond($^5$-NMDB) showed different behaviour from a methylene interrupted double bond in a molecule with a given cahinlength. Silver-ion HPLC exhibited excellent resolution in which fractions(23 fractions) were resolved on the basis of the number and configuration of double bonds. In this instance, the strength of interaction of a ${\Delta}^5$-NMDB system with silver ions seemed to be weaker than a methylene interrupted double bond system. The principal triacylglycerol species are as follows ; $(C_{18:2{\omega}6)2}/C_{18:1{\omega}7}$, $C_{18:1{\omega}9}/C_{18:1{\omega}7}/C_{18:2{\omega}6}$, $(C_{18:1{\omega}7)2}/C_{18:2{\omega}6}$, $C_{16:1{\omega}7}/C_{18:1{\omega}9}/C_{20:3}{\Delta}^{5,11,14}$, $C_{16:1{\omega}7}/C_{18:1{\omega}7}/C_{20:3}{\Delta}^{5,11,14}$, $C_{18:1{\omega}9}/C_{18:1{\omega}7}/C_{18:2{\omega}6}$, $C_{18:1{\omega}9}/C_{18:2}{\Delta}^{5,5}/C_{20:3}{\Delta}^{5,11,14}$, $(C_{18:1{\omega}7)2}/C_{18:2{\omega}6}$ and $(C_{18:1{\omega}9)2}/C_{18:2{\omega}6}$, while simple triacylglycerols without $C_{18:2{\omega}6})_3$ were not present. Stereospecific analysis showed that fatty acids with ${\Delta}^5$-NMDB system and saturated chains were predominantly located at the site of sn-3 carbon of glycerol backbones. It is evident that there is asymmetry in the distribution of fatty acids in the TG molecules of Ginkgo nut oils.

• 한국환경과학회지
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• 제12권6호
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• pp.565-572
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• 2003

The aim of this research is to survey the census of street trees and to provide remedial measures for street trees management to Miryang City. To do this, survey was carried out 16 region units in Miryang City. Through the survey, the current status of street trees’ map was made using automated map. From the results, it is turned out that 17,079 trees have been planted in Miryang City. The major species of street trees are Prunus serrulata var. spontanea(41.6%), Ginkgo biloba(26.1%), Pinus thunbergiana(13.3%) and the others are 12 species(19.0%). By the region units, Samrangjin-Eub is the most that 2,308 street trees are planted, and the next is Chodong-Myon(2,206 trees). The littlest street trees planted region is Cheongdo-Myon. In the results of comparison the component of street trees with other municipal cities, e.g. Seoul, Incheon, Kwangyang etc., only a few street trees have been planted so many in Miryang City. So, Miryang City indicated high proportionate street trees planting ratio. The suggested remedial measures are consisted with identifying the each street, increasing the green area by accepting the suitable street tree planting model, improving the physiological growth condition and systematic management with GIS.

• Mycobiology
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• 제48권3호
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• pp.228-232
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• 2020

Cordyceps is a genus of ascomycete fungi and is well known as one of the important medical fungi in Chinese, Korea, and other Asian countries, because of its various beneficial effects on human health. The pharmacological activities of Cordyceps extract are mainly focused on anti-cancer, anti-metastatic, and immune modulating effects. In the present study, we investigated whether the antiplatelet effect of ethanol extract of cultured Cordyceps militaris (CMEE) with FeCl₃-induced arterial thrombosis model. We observed that CMEE exhibited a significant inhibitory effect against ADP and collagen-induced platelet aggregation. However, there were no significant differences in prothrombin time (PT) and activated partial thromboplastin time (aPTT). These results suggest that antithrombotic activity of CMEE is related to antiplatelet effect rather than anticoagulation effect, and CMEE may be a positive effect on improving blood circulation against vessel injury and occlusion.

• 대한예방한의학회지
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• 제12권1호
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• pp.103-118
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• 2008

Antioxidants are compounds that protect cells against the damaging effects of reactive oxygen species (ROS). Some ROS, such as superoxide and hydrogen peroxide, are normally produced in cells as by-products of biochemical reactions or as signaling molecules. When ROS-generating reactions are activated excessively, pathological quantities of ROS are released to create an imbalance between antioxidants and ROS, called as oxidative stress. Oxidative stress, which may result in cellular damage, has been linked to cardiovascular disease, diabetes, cancer, and other degenerative conditions. In humans the first line of antioxidant defence are the antioxidant enzymes, especially SOD, glutathione peroxidase (GPX), and to a lesser extent catalase, as well as the tripeptide glutathione(GSH). These enzymes will help destroy ROS(reactive oxygen species) such as hydroxyl radical, $H_2O_2$ and lipid peroxides, while GSH protects against oxidized protein. Many herbal medicines possess antioxidant properties. Herbal antioxidants may protect against these diseases by contributing to the total antioxidant defense system of the human body. Here, many herbal medicines including Ginseng, Licorice, Ligusticum Chuanxiong, Ginkgo biloba and many others was reviewed in terms of anti-oxidant efficiency related to their components.

• 한국가구학회지
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• 제21권2호
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• pp.188-195
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• 2010

This study has been focused on the evaluation of domestic softwood timbers to replace imported timbers for woodcrafts and furniture-making. Figures on radial and tangential sections were observed with naked eyes. As the result of study on the figures appeared on the wood surface of 6 species of trees, flat grain and edge grain were clearly found from Taxus cuspidata. Juniperus chinensis and Ginkgo biloba had wavy grain figure and pigment figure, and blister figure was found in Pinus densiflora, Larix kaempferi showed pitch streak and irregular figures on its tangential section due to growth abnormalities. Wavy grain figure appeared weakly on near knot of Pinus koraiensis. The characteristic figures shown from each species of trees are expected to be used for crafts, sculptures, furniture, and interior decoration. They are also considered to have great potential to substitute imported timber sufficiently, which are currently used a lot for wood crafts and furniture-making.

• Environmental Analysis Health and Toxicology
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• 제20권2호
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• pp.143-151
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• 2005

Exposure of skin to UV-B radiation can cause inflammatory response and immunosuppression. It has been reported that Korean Red Ginseng (KRG) has several pharmacological and physiological effects such as antioxidant, anticancer and improving immune function. In this study, we investigated that topical KRG and KRG + EGb 761 (Ginkgo biloba extract) combination prevented UV-B induced inflammation and inhibition of contact hypersensitivity response. Topical application of KRG, f days prior to or 5 days after exposure to 1MED and 2MED of UV-B, reduced skin thickness compared to non -treated group and resulted in protection against immunosuppression. However, KRG+EGb 761 combination has a little protection against the only 1MED UV-B. In conclusion. Topical application of KRG was more effective than combination in protection against UV-B induced inflammation and immune suppression. Also, we suggest that KRG can provide protection from inflammation and immunosuppression by UV-B radiation.

• 한국융합학회논문지
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• 제9권6호
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• pp.89-98
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• 2018

은행잎의 Biflavonoid인 ginkgetin과 isoginkgetin을 화장품 소재로 이용 가능성 여부를 확인하기 위해 이를 분리하여 화학 구조 및 물리화학적 특성을 규명하고자 하였다. 음건한 은행나무 단풍잎 1 kg을 순차적으로 ethanol, n-hexane, ethylacetate 및 normal butyl alcohol로 분획 추출하여 최종 ginkgetin과 isoginkgetin을 확보하였다. 두 화합물은 모두 HPLC를 통해 99% 이상 고 순도로 나타났고 MS spectrum을 통한 분자량은 566, 분자식은 $C_{32}H_{22}O_{10}$로 동일한 이성질체적 구조를 나타냈다. UV spectrum으로 flavonoid의 골격과 NMR로 aromatic proton의 존재와 탄소 수 및 구성비를 측정한 결과 문헌에 보고된 flavonoid 화합물의 정보와 일치하였다.

• 한국응용곤충학회지
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• 제39권2호
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• pp.83-87
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• 2000

최근 강원도 원주 등지에서 은행나무에 큰 피해를 주었던 대만나방의 생활사를 1998년부터 1999년까지 조사하였다. 현재까지 우리 나라에서는 자세히 보고된 바 없는 알, 유충, 번데기 및 성충의 형태적 특징과 각 충태별 기간 및 생태적 특성을 조사하였다. 대만나방은 연 1회 발생하였으며, 6령충으로 기주식물의 가지에서 월동하였다. 유충은 총 9령을 거치며, 종령유충은 6월하순경에 가지에서 은행잎 2-3장을 엮은뒤 갈색실을 토하여 고치를 틀고 그 속에서 번데기가 되었다. 성충은 7월초순부터 8월초순에 걸쳐 우화하였으며 우화최성기는 7월하순이었다. 교미한 암컷은 평균 205개의 알을 난괴형태로 산란하였으며, 산란장소는 가지, 줄기, 또는 잎의 가장자리였다.