• Journal of Microbiology and Biotechnology
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• 제18권12호
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• pp.1915-1918
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• 2008

An entomopathogenic fungus was isolated from an infected aphid. The isolate conformed most closely to Lecanicillium attenuatum CBS 402.78 (AJ292434) based on the internal transcribed spacer (ITS) region of its 18S rDNA, and thus was designated L. attenuatum CNU-23. Laboratory and field evaluations of CNU-23 blastospores were carried out for the control of green peach aphids. The laboratory evaluations of CNU-23 revealed an aphid mortality of about 80% with an estimated $LT_{50}$ of 3.72 days after the application of CNU-23 at $1{\times}10^6$ blastospores/ml. Meanwhile, the field evaluations of CNU-23 performed on greenhouse pepper plants during the rainy season showed an aphid mortality ranging from 72% to 97%. Significant sporulation was observed in the aphids treated with CNU-23. Therefore, the results suggest that L. attenuatum CNU-23 can be used as a biocontrol agent for green peach aphids on greenhouse pepper plants.

• Journal of Forest and Environmental Science
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• 제26권3호
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• pp.209-217
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• 2010

The volatile aroma of fresh leaves is one of main factor in taste of all the edible green plants. The volatile aroma in almost edible green leaves are suggested as essential oil compounds. Ligularia fischeri, Synurus deltoides, Ligularia fischeri var. spiciformis and Aster scaber are one of the favourable edible green plants in Korea. In this study, volatile aroma compounds from Ligularia fischeri and Ligularia fischeri var. spiciformis species were analyzed by the SPME/GC/MSD method. Ligularia fischeri had 78 volatile aroma compounds such as D-limonene(20.28%), ${\alpha}$-pinene(dextro, 14.15%), L-${\beta}$-pinene(12.85%), 3-carene, ${\beta}$-cubebene(10.39%), etc. Ligularia fischeri var. spiciformis had 83 volatile aroma compounds such as D-limonene(36.97%), ${\beta}$-cubebene(13.95%), L-${\beta}$-pinene(13.38%), ${\alpha}$-pinene(dextro, 4.76%), caryophylle-ne(3.33%) etc. Conclusively, the commom volatile aroma compounds in Ligularia fischeri and Ligularia fischeri var. spiciformis leaves were D-limonene, ${\alpha}$-pinene, L-${\beta}$-pinene, ${\beta}$-cubebene, Caryophyllene, ${\alpha}$-farnesene, terpinolen. However, the composition and amount of volatile aroma compounds were very different between the two species.

• 환경생물
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• 제17권4호
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• pp.379-387
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• 1999

최근 우리나라에서는 산업이 급속도로 발전하면서 급증하는 전력수요를 충당하기 위하여 원자력발전소의 건설과 가동이 증가 추세에 있다. 수년에 걸친 발전소의 건설 과정에서 부지의 매립과 준설은 저서 해조류의 서식처를 교란시키고 이는 나아가서 종조성의 변화를 야기한다. 발전소가 정상 가동하게 되면 필연적으로 다량의 온배수를 주변으로 방출하는데, 고착성 해조류는 수온의 상승에 민감하게 반응한다. 국내 원자력발전소에서는 냉각수가 복수기를 통과하면서 수온이 7~12$^{\circ}C$ 상승하게 되며, 짧은 거리의 배수로를 거쳐 주변으로 방출된다. 배수로에 인접한 구역에서는 저서 해조류의 종조성과 다양성 이 감소하는 것으로 조사되었다. 한편 발전소 냉각계통의 가동은 해조류 개체군 수준에서 생장률과 생장주기에 영향을 미치는 것으로 확인되었다. 연안수와 혼합되기 전의 배수로에 출현하는 해조류는 높은 수온에서도 견딜 수 있는 내열종으로 간주될 수 있으며, 동해안에 위치한 3개 원자력발전소의 배수로에서 1992~1998년에 걸쳐 출현한 해조류 중 출현빈도 20%이상의 내열종 해조류는 총 35종(남조류 4종, 녹조류 9종, 갈조류 8종, 홍조류 14종)이었다. 해조류가 우리 민족에게 귀중한 자원이 되고 있음을 고려해 볼 때, 발전소로부터 방출되는 폐열이 해조식생에 미치는 영향을 저감시킬 수 있는 대책 수립이 요망된다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.37-37
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• 2018

We use two different methods for laboratory propagation from seed of lady's slipper orchid(Cypripedium macranthos Sw.); immature seed which also called green capsule or fully mature seed about 120~130 days from pollination. In green capsule culture, the seed pods should be collected within precisely right time. The right time of seed collection could be diverse under the wether conditions or nutritional factors of the plants. In fully matured seed culture, the more complicated procedures are needed to break the dormancy of the seed; thermal or chemical treatment. The seedlings in this study were easily germinated from immature seeds in Harvais medium; 53 days after pollination(DAP) in Cypripedium pubescens, DAP 65 in C. parviflorum and C. macranthos. The germinated seedlings were transplanted to hormone free media immediately to avoid abnormal growth of seedlings. When the seedlings have roots with a minimum length of around 2-3cm and have visible dormant buds, the seedlings were removed from the flask and stored in refrigerator for vernalization. To examine the correlation of seedlings and maternal plants, the 125 seedlings of C. macranthos were transplanted in the soil bed at a distance of 20-100 cm from mother plants on April 20. The survival rate of seedlings were 92% in 20 cm distance from the ripe plants, and 56 % in 100 cm distance. The seedlings which were transplanted near mother plants showed vigorous growth in plant height, leaf width, and especially dormant buds. Considering the existence of mycorrhiza which is a symbiotic association between a fungus and the roots of a orchid vascular, the various fungus from mother plants could affect the growth of the seedlings. These results indicate the possibility of high and stable production and practical industrialization of endangered lady's slipper orchids.

• 공업화학
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• 제21권1호
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• pp.104-110
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• 2010

국내에서 가동 중인 석탄, 오리멀젼, LNG 등의 화력발전소에서 선택적 촉매 환원(SCR) 공정에 사용되고 있는 촉매의 재생을 연구하기 위하여 이들 촉매의 활성 저하를 고찰하였다. XRD, ICP-AES, BET, SEM 분석 등으로 촉매의 특성분석을 수행하였고 이들 촉매에 대하여 암모니아 SCR을 행하였다. 석탄 화력발전소의 SCR 촉매는 연료 성분과 관련된 황산염과 분진의 침적에 의한 기공 폐색에 기인하여 활성저하가 발생하였다. 오리멀젼 화력발전소의 SCR 촉매는 연료에 함유된 바나듐과 황 성분 그리고 연료에 첨가된 마그네슘 화합물의 침적에 의한 기공 폐색에 기인하여 촉매 표면적이 크게 감소하였다. 그러나 촉매의 암모니아 SCR 활성은 약간 감소하였다. LNG 화력발전소의 SCR 촉매는 사용 기간이 2년 이상임에도 불구하고 활성저하는 거의 일어나지 않았다.

• Molecules and Cells
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• 제25권2호
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• pp.272-278
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• 2008

The carbon-ion beam (CIB) generated by the heavy-ion medical accelerator in Chiba (HIMAC) was targeted to 7-day-old rice. Physiological parameters such as growth, and gene expression profiles were examined immediately after CIB irradiation. Dose-dependent growth suppression was seen three days post-irradiation (PI), and all the irradiated plants died by 15 days PI. Microarray (Agilent rice 22K) analysis of the plants immediately after irradiation (iai) revealed effects on gene expression at 270 Gy; 353 genes were up-regulated and 87 down-regulated. Exactly the same set of genes was affected at 90 Gy. Among the highly induced genes were genes involved in information storage and processing, cellular processes and signaling, and metabolism. RT-PCR analysis confirmed the microarray data.

• 한국환경복원기술학회지
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• 제18권1호
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• pp.115-125
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• 2015

This study was carried out to analyze comparison of carbon storage and physicochemical properties of vegetation soil for extensive green rooftop established at Seoul National University in september 2013. For this study, 42 plots were made by 2 kinds of vegetation soil including A-type and B-type. A-type vegetation soil plots were made of 90% perlite and 10% humus and B-type vegetation soil plots were made of 60% perlite, 20% vermiculite, 10% coco peat and 10% humus. This study used 6 kinds of plants which are Aster koraiensis, Sedum takesimense, Zoysia japonica Steud, Euonymus japonica, Rhododendron indicum SWEET and Ligustrum obtusifolium. Field research was carried out in 11 months after planting. Physiochemical properties of B-type vegetation soil plots were better than A-type vegetation soil plots in every way and soil carbon content was also higher at B-type vegetation soil plots as well. B-type vegetation soil plots were maintained 10 to 20% higher soil water content than A-type vegetation soil plots of the study period. The species of herb which showed the best carbon storage was Zoysia japonica Steud at B-type vegetation soil plots. The species of shrub which showed the best carbon storage was Ligustrum obtusifolium at B-type vegetation soil plots. Plants generally showed better growth at B-type vegetation soil plots and B-type vegetation soil plots were higher than A-type vegetation soil plots in soil carbon stock.

• Journal of Ecology and Environment
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• 제38권4호
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• pp.541-544
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• 2015

We report the status of wetland vascular plant species in Korea including the whole peninsula and its adjacent islands. This analysis was based on database from our previous categorized list. In all, 4,050 taxa have been reported, including 3,769 native and 281 naturalized. Of these, 479 taxa (12%) are considered as wetland vascular indicator species: 240 obligate wetland plants (OBW) and 239 facultative upland plants (FACW). Approximately 31% of those 479 taxa, i.e., 149 taxa, are labelled as aquatic macrophytes. Wetland plants, mostly herbaceous but some woody, inhabit aquatic bodies and wet meadows. Except for two OBW and six FACW taxa, the rest of the plants are summer-green only. The information provided here is valuable for making assessments of wetland ecosystem health, as well as for developing management plans to preserve and restore wetlands and their resident plant species while also creating artificial wetland environments.

• Asian Pacific Journal of Cancer Prevention
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• 제15권11호
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• pp.4385-4394
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• 2014

Cancer is the most deadly disease that causes the serious health problems, physical disabilities, mortalities, and morbidities around the world. It is the second leading cause of death all over the world. Although great advancement have been made in the treatment of cancer progression, still significant deficiencies and room for improvement remain. Chemotherapy produced a number of undesired and toxic side effects. Natural therapies, such as the use of plant-derived products in the treatment of cancer, may reduce adverse and toxic side effects. However, many plants exist that have shown very promising anticancer activities in vitro and in vivo but their active anticancer principle have yet to be evaluated. Combined efforts of botanist, pharmacologist and chemists are required to find new lead anticancer constituent to fight disease. This review will help researchers in the finding of new bioactive molecules as it will focus on various plants evaluated for anticancer properties in vitro and in vivo.

• 한국잠사곤충학회지
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• 제26권2호
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• pp.7-10
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• 1984

뽕나무에 VA mycorrhizae의 1종인 Glomus mosseae, Mosse and frappe를 접종하여 소독을 하지 않은 토양에 심어 6월간 재배한 결과를 요약하면 다음과 같다. 가. VA mycorrhizae 접종 뽕나무는 전체 조장은 15%, 조경은 19%, 뽕잎량은 30%가 더 많았다. 나. VA mycorrhizae접종 뽕나무의 뽕잎 성분은 질소는 12%, 인산은 10%, CaO는 10%가 더 많았고 $K_2$O는 차이가 없었으며 MgO는 20%가 더 많았다. 다. VA mycorrhizae접종 뽕나무 뿌리는 질소는 20%가 더 적었고 인산은 21%가 더 많았다.