• Korean Journal of Clinical Laboratory Science
• /
• v.48 no.2
• /
• pp.102-108
• /
• 2016

Der p 2 is the major allergen of the house dust mite (HDM) associated with the development of allergic diseases. The pathogenic mechanism of the allergy is related to cytokine release of lymphocytes and constitutive apoptosis of neutrophils. In the present study, we examined whether Der p 2 induces cytokine release of lymphocytes, which is involved in regulation of neutrophil apoptosis. In normal and allergic subjects, Der p 2 enhanced the secretion of IL-6, IL-8, MCP-1, and GM-CSF in a time-dependent manner. Although Der p 2 was weakly effective against neutrophil apoptosis, conditioned media collected from normal and allergic lymphocytes after Der p 2 treatment inhibited the apoptosis of normal and allergic neutrophils. Der p 2 showed stronger inhibition of apoptosis of allergic neutrophils cocultured with allergic lymphocytes than normal neutrophils cocultured with normal lymphocytes. These findings improve our understanding of the role of Der p 2 in regulation of lymphocytes and neutrophils and will enable elucidation of allergy pathogenesis.

• Korean journal of applied entomology
• /
• v.23 no.3 s.60
• /
• pp.153-157
• /
• 1984

The present work was designed to study the yield loss on rice at different appearance days of hopperburn caused by the brown planthopper(BPH), Nilaparvata lugens Stal, when rice plants were infested with BPH on booting and heading stages. Dead plants were colleted from 23 days after heading stage with intervals of 5 days. Yield losses by the initation of BPH infestation was greater at tooting than at heading stage. Compared to the uninfested plot, there was a reduction in 1,000 grain weight and filled grain percentage at both stages. Positive relationship was observed between rice yield(Y) and the number of days from heading to the appearance of the hopper-burn. Regression equations calculated were; for BPH feeding from booting $\hat{Y}(g)=10.145X-16.374(r=0.9726^{**})$, and for BPH feeding from heading $\hat{Y}(g)=9.792X+26.936(r=0.8850^{**})$.

• Journal of Korean Society of Forest Science
• /
• v.107 no.1
• /
• pp.43-49
• /
• 2018

This study was conducted to investigate the effects of warming and precipitation manipulation on seasonal changes in fine root production (FRP) and fine root mortality (FRM) of 33-month-old Pinus densiflora seedlings for two years. The seedlings in warmed plots were warmed with $3.0^{\circ}C$ higher using infrared heaters. The air temperature of warmed (TW) plots was set to increase by $3^{\circ}C$ compared to temperature control (TC) plots, and the three precipitation manipulation consisted of precipitation decrease (-30%; PD), precipitation increase (+30%; PI) and precipitation control (0%; PC). FRP ($mm\;mm^{-2}\;day^{-1}$) was significantly altered by only precipitation manipulation (PC: 3.57, PD: 4.59, PI: 3.02), while warming had no significant effect on the FRP and FRM. Meanwhile, interactions between warming and precipitation manipulation and seasonal changes had no significant effects on FRP and FRM. However, the influences of seasonal changes in soil temperature and soil moisture on FRP and FRM were different according to warming. In TW plots, FRP showed a positive relationship with soil temperature, and FRM showed a negative relationship with soil moisture. On the other hand, in the TC plots, FRP showed a positive relationship with soil moisture, and there were no relationships between FRM and soil temperature and moisture. These results indicate that the climate factors that affect FRP and FRM might vary as the warming progresses.

• Asian Journal of Turfgrass Science
• /
• v.19 no.1
• /
• pp.27-38
• /
• 2005

This study was conducted to find out withering and dying trends of turfgrasses on the base of tree, and to investigated how much area of turfgrasses withering and dying were progressed on angle of inclination at golf course. Turfgrasses withering and dying on base of trees on slope was extended more to the down-solpe direction than to the up-solpe direction. This trend was common in all experiment plot. Turfgrasses on the base of trees were withered and dead by competing with tree root fur nutrients and moisture in soil. But the trend of the withering and dying in some experiment plots occurred by soil erosion following turfgrass withering and dying occurring on upside ridge. This trend was generally appeared in region of tree community at upside ridge. The form of turfgrass withering and dying on the base of tree in some experiment plots was similar to that of the tree crown. This withering and dying from occurred at the $11^{th}$ experiment plot in Ji San Golf Course and the $6^{th}$ experiment plot in East valley Golf Course.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2016.01a
• /
• pp.257-258
• /
• 2016

시험은 학생들의 학습진단, 학습을 촉진 시키기 위한 학습동기를 유발해주는 역할을 하게 된다. 그 외에도 많은 이유로 평가가 실시되고 있고 시험이라는 제도는 결국 개인에게는 아주 중요한 결과를 안겨주게 된다. 본연구는 시험을 준비하는 모든 수험생들에게 유용한 모의고사 점수를 분석할수 있는 시스템을 개발하고자한다.

• Korean Journal of Environment and Ecology
• /
• v.14 no.1
• /
• pp.18-27
• /
• 2000

지리산국립공원 동부지역인 경남하동군 화개면에 위치하는 삼신봉(해발 1,284m) 산림 중 산불이 발생하였던 지역의 식생회복현황을 파악하기 위해 산불이 발생하였던 지역에 20개 조사구 대조지역에 12개 조사구를 설정하고 연구를 수행하였다 산불이 발생하였던 지역에 설정한 20개 조사구를 대상으로 TWINSPAN과 DCA를 분석한 결과 신갈나무군집(I) 신갈나무-쇠물푸레군집(II) 으로 분리되었고 대조지역에 설정한 조사구는 신갈나무군집(II)이었다 군집 I과 군집II에서 교목층과 아교목층의 대부분 수목이 고사상태이었고 관목층에서는 산화후 천이 초기에 나타나는 조록싸리가 우점하고 있었다 상대우점치와 유사도지수를 분석한 결과 산불이 발생하였던 신갈나무군집(I) 신갈나무-쇠물푸레군집(II) 은 대조구인 신갈나무군집(III)과 유사도지수분석에서 유사성이 높았는데 산불발생 이후 피해를 입은 신갈나무가 맹아에 의해 회복속도가 빠른 것으로 추정되었다 Shannon의 종다양도는 산불지역(군집 I,II)에서 각각 0.3259, 0.4727이었고 대조구 (군집III)는 0.1084로 나타났다.

• Korean Journal of Medicinal Crop Science
• /
• v.8 no.2
• /
• pp.151-156
• /
• 2000

Field experiments were conducted to investigate the yield and paeoniflorin content between healthy peony and blight plot of top part with every year during 3 years at June, July, August, September, separately. Stem length and diameter, No. of stem in the blight plot of peony were decreased in early in blight time compared with those in no blight growth. No. of flower buds per plant was 5.2, 4.6 in 3 year- grown and 4year-grown plots at late June blight compared with 11.5, 16.2 in no blight. No. of axillary flower was also similar to as above. Main root length and root diameter was most decreased in the plot of late June blight compared with healthy peony. No. of root more than 10mm of root diameter was small in order of blight time, namely Late June, July, August and September. The root dry yield of 4 year healthy peony was most high in 1,603kg per 10a, but it was lowed in 1,007kg in the plot lasted blight during 3years at late June. Paeoniflorin content was no different between 3year-grown and 4year-grown, but it was high in late June blight plot increased with the early in blight time.

• Korean Journal of Clinical Laboratory Science
• /
• v.47 no.4
• /
• pp.230-236
• /
• 2015

Dermatophagoides pteronissinus (DP) is one of the house dust mites (HDM) associated with allergic diseases. The cysteine protease Der p 1 from DP is a powerful allergen. The pathogenic mechanism of allergy is involved in cytokine secretion of lymphocytes and spontaneous apoptosis of neutrophils. In this study, we investigated whether Der p 1 induces cytokine secretion of lymphocytes and if the release of cytokines is associated with regulation of neutrophil apoptosis. In normal and allergic subjects, Der p 1 increased IL-6, IL-8, MCP-1, and GM-CSF release in a time-dependent course. Supernatants collected from normal and allergic neutrophils after Der p 1 stimulation suppressed the apoptosis of normal and allergic neutrophils, although Der p 1 alone has no effect on neutrophils. Der p 1 suppressed neutrophil apoptosis in coculture of normal neutrophils with normal lymphocytes. Der p 1 more strongly suppressed apoptosis of allergic neutrophils cocultured with allergic lymphocytes than normal neutrophils cocultured with normal lymphocytes. In summary, Der p 1 increases the secretion of cytokines, which has anti-apoptotic effects on neutrophils of normal and allergic subjects. These results will contribute to elucidate the pathogenic mechanism of allergic diseases.

• Journal of the Korean earth science society
• /
• v.24 no.6
• /
• pp.568-577
• /
• 2003

The purpose of this paper is to examine the geomorphic processes of beach and sanddune development in the Chungcheong-Namdo Province. The sands consist mainly of quartz and feldspar with lesser amounts of mica and other heavy minerals. With the exception of those from the granite, the sands have a very fine texture. Another characteristic of the sand grains is low degrees of roundness and grading indicating that source areas for the material were in the vicinity of the accumulating field. Over the years, the beaches have receded as a response to the decreasing amount of depositional materials. The driving force for the formation and transformation of coastal dunes in the study area is dominant winds from the center of the Siberian High. To some extent, the erosion of coastal dunes has been a global phenomenon. The degradation process occurred most actively when spring tides attacked beaches, berms, and foredunes. The relief and shape of present-day coastal dunes is determined initially by the Pleistocene strata underneath. From the fact that the strata contained traces of frozen structure, it can be inferred that sediment once experienced the process of soil formation.

• Korean Journal of Environment and Ecology
• /
• v.20 no.1
• /
• pp.1-8
• /
• 2006

The objective of this study was to monitor the regenerated process of natural vegetation on the rear-slope of Jangheung multi-purpose dam using the recycling eco-revegetation technique. The monitoring plots were established in May 2004 and the plots were monitored in May 2004 and October 2005. Flora, plant community structures, naturally introduced plants, death rates were monitored. The change of flora after wood chip mulching decreased in family and species, but the influence of vine tree was extended. The urbanization index declined. Naturally introduced species and death ratios at the monitoring plot had a tendency to a higher increase in the deciduous broad-leaved forest.