http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Selective enhancement of fluorescence using photonic crystal films
송우람,정서현,배자영,박송주,박성수,이형일,이원주,박종목 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
We report a method to enhance fluorescence using bilayers of photonic crystal films. In our method, the photonic band-gap of an underlying photonic crystal film could be easily modulated by changing silica particle size and the distance between ordered spherical silica particles and matrix. We prepared bilayer photonic crystal films, one of film recycles the excitation of fluorescent, and the other film selectively increases desire wavelength between emissions of fluorescent. Then, when a fluorescent polymer solution was spin-coated on the photonic crystal film, we observed overall enhancement of fluorescence as well as the distinct enhancement at 592nm owing to the photonic band-gap of the underlying bilayer of photonic crystal films.
Ecological Responses and Remediation Ability of Water Fern (Azolla japonica) to Water Pollution
송우람,박훈,이은주 한국식물학회 2012 Journal of Plant Biology Vol.55 No.5
The ability of the water fern Azolla japonica to remediate phosphorus (P), nitrogen (N), and iron (Fe)contamination, and its physiological responses to three common sources of water pollution (landfill leachate, swine lagoon sewage, and fish farm sewage) and standard solution were investigated. The biomass, water content, and chlorophyll content of Azolla japonica in each solution were measured,and the concentrations and accumulation rates of polluting elements in the solutions were determined. A. japonica showed over eight-fold increase in biomass within only 20 d in every solution except in swine lagoon sewage, extremely high in N concentration. Consistent chlorophyll and water contents of the plant in most solutions showed that A. japonica can adapt to highly concentrated solutions. N, P, and Fe concentrations of the solutions decreased significantly within the 20 d. In most treatments, A. japonica showed high N accumulation and also showed total uptake of P and Fe from the solutions. In reference to this result, using this species as a phytoremediator plant would have additional benefits of helping maintaining endangered populations of A. japonica. Therefore, the plant’s fast growth, good element remediation efficiency, and conservation needs makes A. japonica a suitable plant species for pollution remediation.
Importance of biomass management acts and policies after phytoremediation
송우람,박훈 한국생태학회 2017 Journal of Ecology and Environment Vol.41 No.3
Background: Although phytoremediation is a promising method for pollution control, biomass produced by the remediation process must be managed; otherwise, it will eventually return to the environment and cause secondary pollution. Therefore, research and policy development for the post-remediation management of biomass are both required. Results: While there are many published studies of phytoremediation, research into post-remediation management is very limited. Therefore, a new study using biomass as a co-composting material was conducted and showed positive effects on soil characteristics and plant performance. However, despite its potential, research and policies to promote this form of management are still lacking. Conclusions: We suggest public engagement in support of “Post-phytoremediation management” legislation that stipulates management of biomass after phytoremediation, promotes recycling of biomass with known environmental risks, and includes specific policies developed for managers. Further research to support and inform such policies and laws is also required.
Assessing the phytotoxicity of cetrimonium bromide in plants using eco-physiological parameters
송우람,김한얼 한국생태학회 2016 Journal of Ecology and Environment Vol.40 No.2
Background: Although cetrimonium bromide is widely used for its bactericidal effects, the safety of cetrimonium bromide remains controversial. Therefore, the phytotoxicity of cetrimonium bromide was tested to evaluate its acute toxicity to plants and possible toxicity to other organisms and the ecosystem. Results: The germination rates of two test species, Lactuca sativa and Brassica campestris, were significantly decreased after cetrimonium bromide treatment. Furthermore, cetrimonium bromide treatment at over 1 mg/L concentration significantly affected root elongation immediately after germination. In pot experiments with semimature plants, significantly decreased shoot elongation and chlorophyll content were detected in both species following cetrimonium bromide treatment. Cetrimonium bromide treatment also significantly increased the antioxidant enzyme activities of plants. Conclusion: Our results show that cetrimonium bromide is phytotoxic, and since phytotoxicity testing can imply potential toxicity in the environment, further studies of the environmental toxicity of cetrimonium bromide should be performed.
Ecophysiological Responses of Plants After Sewage Sludge Compost Applications
송우람,이은주 한국식물학회 2010 Journal of Plant Biology Vol.52 No.4
Composting is one of the most appropriate methods to recycle sewage sludge. Sewage sludge compost is a suitable solution for improving the quality of barren soil at landfill. Therefore, it is important to investigate the effects of sewage sludge compost on plants. Different compost application methods (mixing and scattering over reclaimed soil) on sawtooth oak (Quercus acutissima) and Japanese red pine (Pinus densiflora) have been tested. The application of sewage sludge compost markedly increased soil moisture and nitrogen content. Compost treatments resulted in significant increases in both plant height and biomass as compared to controls. Compost treatments led to a significant increase in the N content of plant leaves. Compost treatments resulted in significant increases in the chlorophyll content and photosynthetic rates of the plants. The scattering of compost over reclaimed soil (compost 2)resulted in lower total antioxidant activity and superoxide dismutase activity than mixing the compost with the reclaimed soil (compost 1), or in the control treatment. Since the growth rates, N content, and photosynthetic rates in compost 2 treatment were not markedly different from compost 1 treatment, it (compost 2) would be a better application method from both an ecological and economic perspective.
Selecting plant species for landfill revegetation: a test of 10 native species on reclaimed soils
송우람 한국생태학회 2018 Journal of Ecology and Environment Vol.42 No.4
Background: Revegetating landfills can be a challenging task as the reclaimed soils are typically dry and have low nutrient content. Therefore, selecting suitable plant species is important for initial revegetation. The issue with current practices (in Korea) is that alien plant species have been typically selected for revegetation projects. In this context, this study selects and tests a set of native plant species for landfill revegetation, accompanied by the assessment of the landfill soils. Results: The soil of the landfill (landfill location) was in a very poor condition with high bulk density and low organic matter and nutrient contents. Among 10 tested species, only Brassica campestris showed high coverage and a sufficient number of individuals in study quadrats sown with seeds. Results suggest that plant species with heavy seeds are the only ones that can adapt to the environment of a typical landfill due to the site’s aridity and low nutrient content. The reason is due to such species’ superior wind resistance and the capacity to provide sufficient energy for the initial growth of the plants for survival in such landfill environment. Conclusions: This study recommends selecting plant species (1) with arid-adapted features and (2) whose seed weight is sufficiently heavy for survival at landfills or areas with a similar condition for future revegetation.
송우리,김명철,정성목 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
A 18 months old, Shih-tzu female dog was presented to Veterinary Teaching Hospital of Chungnam National University with a history of anorexia. In blood chemistry, blood ammonia level was severely elevated. And abdominal radiography and ultrasound revealed microhepatica. In positive-contrast portography, there was extrahepatic single shunt between portal vein and caudal vena cava. It was diagnosed as extrahepatic single PSS. Surgical correction was performed using Ameroid constrictor. One hundred days after surgical correction, there was no evidence of recurrence and plain abdominal radiography disclose normal hepatic size.