• Journal of Forest and Environmental Science
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• 제28권4호
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• pp.282-288
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• 2012

Spider fauna of Mt. Yongmunsan located in Yangpyeong-gun, Gyeonggi-do, was surveyed from April to October in 1996. A total of 75 species of 51 genera in 22 families from 996 individuals of spiders were identified. Species richness of each family, there were 17 Araneid species (22.7%), followed by each of the 7 Thomisid and Tetragnathid species (9.3%), 6 Salticid species (8.0%), and 5 Lycosid species (6.7%). Zoogeographically, spider fauna of Mt. Yongmunsan represented 1 cosmopolitan species (1.3%), 2 holarctic region species (2.6%), and 9 palearctic region species (12.0%), and 4 Korean endemic species (4.0%). Thus it is suggested that spider fauna of Mt. Yongmunsan was under northern regional influence.

• 한국환경과학회지
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• 제6권1호
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• pp.89-94
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• 1997

The flora of Mt. Kum.lung(80 lm) was Investigated to compare the flora of Mt. Hwang-Ryung, Mt. Cheon-Hwang, Mt. Chulseo. The vascular plants, collected from March 1995 to Oct., 1996, were consisted of a total 564 taxa: 103 families, 312 genera, 493 species, 1 subspecies. 66 varieties and 4 forms. The Korean endemic plants of this area were 11 taxa, the alplan and endangered plants were 29 taxa, the special wild plants designatlrlg by Enoronmental Agency were 2 taxa and the alpian plants were 18 taxa. Because many plants, being necessary to conserve, are distributed Kumjung, but if development is indespensable. destruction of natural ecosystem must be minimized.

• 한국동물학회지
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• 제38권1호
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• pp.87-95
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• 1995

한국산 담수어류의 잉어목, 황어아과(Leuciscinae) 어류 2속 5종의 계통적 유연관계를 구명하기 위하여 mtDNA분석을 실시하였다 6 base를 인지하는 10개의 제한효소를 처리하여 얻어진 강tDNA의 크기는 16.5-17.5 Kb였으며 Bcl I, Bgl I, Bgl II, Hin dIII, Pvu II, Xba I 등은 종간 차이가 뚜렷하였다. 각종의 집단간 mtDNA분화정도는 매우 낮았으나(p=1% 미만) M. oxyephalus의 무주집단과 제주집단은 예리적으로 큰 차이를 보였다(p=5.3%) Moroco속의 종간 분화정도를 비교한 결과 M. oxycephafus와 M. lagowsk서 사이가 평균 f=7.2%로 근면관계가 제일 가까웠고 M. keumkang과 M. semotilus는 타종들과 근연관계가 제일 멀었다. Moroco속과 Phoxinus속간의 평균 유전적 분화정도는 f=13.7%로 현저한 차이를 보였다. Brown 등(1979)의 공식을 이용하여 이들 황어아과 2속 5종의 분화시기를 추정한 결과 이들은 후기 선신세(Pliocene)와 흥적세(Pleistocene) 사이에 분화된 것으로 추정되었으며 이 결과는 동위효소 연구에서 얻어진 결파(Yang and Min, 1989)와 잘 일치한다.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.185.1-185.1
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• 2003

In this study, we investigated the effect of cadmium on genes expression related to zinc homeostasis in HT22 hippocampal neuron cell line by RT -PCR and western blotting technics. In the time-course effect, cadmium up-regulated the relative levels of MT -I and MT -II to~b-actin at 4 hr after treatment. These effects were consistent with MT -I/II protein contents by western blot analysis. But MT -III, a specific MT isoform in brain, was not affected by cadmium. (omitted)

• 현장농수산연구지
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• 제12권1호
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• pp.11-19
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• 2010

This study was carried out to investigate the characteristics survey of Clavicorona pyxidata strains. C. pyxidata are selected 3 kinds of strains collected in GWANG DEOCK Mt., DO BONG Mt., and BUK HAN Mt., Mycelial growth of C. pyxidata collected from GWANG DEOCK and BUK HAN Mt. is 64mm, 60mm for 18days respectively. DO BONG Mt strain is 85mm for 9 days. Transparent crystal body of C. pyxidata mycelia were appeared by microscopic examination of 100 magnification. Optimal temperature of mycelial growth in C. pyxidata strains are 25~30℃ respectively.

• Weed & Turfgrass Science
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• 제2권4호
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• pp.381-386
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• 2013

지구온난화로 인한 기후변화로 인하여 강수량과 집중강우의 빈도가 높아질 것으로 예측된다. 본 연구는 잔디류와 기타 식량 원예작물 들의 토양유실을 알아보고자 수행하였다. 작물별 토양유실은 한국잔디와 한지형잔디 처리구의 강수량 및 강우 강도와 상관없이 토양유실이 거의 발생하지 않아서 토양침식에 대한 보호 효과가 매우 우수하였다. 작물별 연간 토양 침식 총량은 한국잔디로 전면 피복된 곳이 가장 적었으며, 그다음 줄떼로 조성된 한국잔디와 한지형잔디로 피복된 실험구에서 토양침식이 매우 적었다. 그리고 밭벼와 콩 재배구에서 5~10 $MT{\cdot}ha^{-1}{\cdot}yr^{-1}$, 고추 재배구에서 7~14 $MT{\cdot}ha^{-1}{\cdot}yr^{-1}$의 토양침식량이 발생되었다. 잡초가 방치된 실험구의 토양침식이 크게 감소된 것에 반하여 잡초가 제거된 나지의 연간 토양침식 총량은 18 $MT{\cdot}ha^{-1}{\cdot}yr^{-1}$이상 크게 발생되었다.

• Biomolecules & Therapeutics
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• 제24권2호
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• pp.132-139
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• 2016

The endothelial-mesenchymal transition (EndMT) is known to be involved in the transformation of vascular endothelial cells to mesenchymal cells. EndMT has been confirmed that occur in various pathologic conditions. Transforming growth factor ${\beta}1$ (TGF-${\beta}1$) is a potent stimulator of the vascular endothelial to mesenchymal transition (EMT). Aspirin-triggered resolvin D1 (AT-RvD1) has been known to be involved in the resolution of inflammation, but whether it has effects on TGF-${\beta}1$-induced EndMT is not yet clear. Therefore, we investigated the effects of AT-RvD1 on the EndMT of human umbilical vein vascular endothelial cells line (HUVECs). Treatment with TGF-${\beta}1$ reduced the expression of Nrf2 and enhanced the level of F-actin, which is associated with paracellular permeability. The expression of endothelial marker VE-cadherin in HUVEC cells was reduced, and the expression of mesenchymal marker vimentin was enhanced. AT-RvD1 restored the expression of Nrf2 and vimentin and enhanced the expression of VE-cadherin. AT-RvD1 did also affect the migration of HUVEC cells. Inhibitory ${\kappa}B$ kinase 16 (IKK 16), which is known to inhibit the NF-${\kappa}B$ pathway, had an ability to increase the expression of Nrf2 and was associated with the inhibition effect of AT-RvD1 on TGF-${\beta}1$-induced EndMT, but it had no effect on TGF-${\beta}1$-induced EndMT alone. Smad7, which is a key regulator of TGF-${\beta}$/Smads signaling by negative feedback loops, was significantly increased with the treatment of AT-RvD1. These results suggest the possibility that AT-RvD1 suppresses the TGF-${\beta}1$-induced EndMT through increasing the expression of Smad7 and is closely related to oxidative stress.

• The Korean Journal of Ecology
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• 제9권1호
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• pp.79-90
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• 1986

The production and decomposition of litters and nutrient cycling of forests were studied at the pine forests such as Pinus densiflora, Pinus koraiensis, Pinus rigida, Pinus thunbergii, Abies holophylla and Larix kaempfer. The annual litter production of the P. densiflora forest was the most on Mt. Mudeung which was 620.75g/$m^2$ and the least on Mt. Halla which was 155.00g/$m^2$. The decay rate of litters was the highest at the P. densiflora forest on Mt. Mudeung which was k=0.256 and the lowest at the P. densiflora forest on Mt. Halla and A. holophylla on Mt. Jiri which were k=0.099. The half time of decomposition of litters was shortest at the P. densiflora forest on Mt. Mudeung and the longest at the P. densiflora on Mt. Halla and A. holophylla forests on Mt. Jiri. The average decay rate of the L. kaempferi forests which was k=0.204 was the highest and that of the A. holophylla forests which was k=0.122 was the lowest. The decay rate tended to decrease against increasing the altitude. The annual production of litterr, the contents of mineral nutrients and the amounts of mineral nutrients inputted into the forest soil tended to increase in proportion to the decay rate, k.

• Bulletin of the Korean Chemical Society
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• 제27권5호
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• pp.642-648
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• 2006

Mushroom tyrosinase (MT) structural changes in the presence of $Cu ^{2+}$ and $Ni ^{2+}$ were studied separately. Far-UV CD spectra of the incubated MT with the either of the metal ions indicated reduction of the well-ordered secondary structure of the enzyme. Increasing in the maximum fluorescence emission of anilinonaphthalene-8-sulfonic acid (ANS) was also revealing partial unfolding caused by the conformational changes in the tertiary structure of MT. Thermodynamic studies on the chemical denaturation of MT by dodecyl trimethylammonium bromide (DTAB) showed decrease in the stability of MT in the presence of $Cu ^{2+}$ or $Ni ^{2+}$ using their activation concentrations. Both activities of MT were also assessed in the presence of different concentrations of these ions, separately, with various monophenols and their corresponding diphenols. Kinetic studies revealed that cresolase activity on p-coumaric acid was boosted in the presence of either of the metal ions, but inhibited when phenol, L-tyrosine, or 4-[(4-methylphenyl)azo]-phenol was substrate. Similarly, catecholase activity on caffeic acid was enhanced in the presence of $Cu ^{2+}$ or $Ni ^{2+}$, but inhibited when catechol, L-DOPA, or 4-[(4-methylbenzo)azo]-1,2-benzenediol was substrate. Results of this study suggest that both cations make MT more fragile and less active. However, the effect of the substrate structure on the MT allosteric behavior can not be ignored.

• 한국환경생태학회지
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• 제4권1호
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• pp.16-22
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• 1990

속리산 지역내에 생육하고 있는 목본식물을 대상으로 현지조사를 하였으며, 총 44과 89속 140종 10변종 및 2품종이 조사되었다. 한편 국내의 몇 지역과 비교하여 속리산 식물상의 식물지리학적인 분포특성을 파악하고자, 백두산, 설악산, 지리산 및 속리산 등 내륙지역 4개지역, 어유정도, 덕적군도, 고군산군도 및 제주도 등 도서지역 4개 지역등 총 8개 지역의 식물상과 상호 비교하였다. 속리산의 식물상은 설악산 및 지리산의 식물상과 가장 유사하였으며, 단풍나무과, 두릅나무과, 참나무과, 피나무과 및 느릅나무과와 같은 북방계 식물 및 노박덩굴과, 메꽃과, 대극과, 갈매나무과, 가지과, 돌나물과, 쐐기풀과 등과 같은 남방계 식물이 유입되어 있는 것으로 해석되었다.