http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Moon, Woon-Ki,Choi, Ji-Woong,Lee, Sang-Jae,An, Kwang-Guk PRAGATI PRESS- INDIA 2017 Journal of environmental biology Vol.38 No.4
<P>Interpretation : Light limitation dominated the system, thus the ratio of Chi(1): Chli had no relation (p> 0.10) with the spiked TP Overall, the experiments of in situ NSBs suggest that high P-inputs from the watershed increased algal growth, but dense F,P or high inorganic solids suppressed eutrophication in the wetland.</P>
Seasonal variation of antibacterial activities in the green alga Ulva pertusa Kjellman
Choi, J.-S.,Ha, Y.-M.,Lee, B.-B.,Moon, H.E.,Cho, K.K.,Choi, I.S. PRAGATI PRESS- INDIA 2014 Journal of environmental biology Vol.35 No.2
The present study was performed to screen out the extracts of algae and assess the seasonal variation in antimicrobial activity of Ulva pertusa against Gardnerella vaginalis. Seasonal variation in antibacterial activity was observed, with the extracts showing no activity during summer and autumn, and showing antibacterial activity from early winter (December) to middle spring (April). The maximum value of antimicrobial activity (6.5 mm inhibition zone at 5 mg disk(-1)) of U. pertusa against G. vaginalis was observed in April. Otherwise, for both chlorophyll a and b, the highest content (2.87 mg g(-1) and 1.37 mg g(-1)) was observed in March 2009. These results may reflect variation in cellular chemical compositions such as secondary metabolite(s) rather than chlorophyll and biological activities according to season.
Studies on toxic effects of nitrogenous compound, putrescine and spermine on cucumber plant growth
Radhakrishnan, R.,Shin, J.-H.,Choo, Y.-S.,Kim, J.-G.,Lee, I.-J. PRAGATI PRESS- INDIA 2014 Journal of environmental biology Vol.35 No.1
The present study was conducted to determine the effects of putrescine (Put) and spermine (Spm) on cucumber plant growth. The low concentration of Put and Spm (0.02, 0.1 and 0.5 mM) was applied to cucumber seedlings. Put and Spm treatments reduced the length and fresh weight of shoots, leaf area, fresh and dry weight of leaves compared to their controls. The enhancement of electrical conductivity and lipid peroxidation was shown in cucumber plants exposed with Put and Spm. However, plants treated with Put and Spm showed low concentration of polyphenol contents with declined level of catalase and peroxidase activity than their controls. These results suggest that application of low concentrations of Put and Spm exhibit detrimental effects on plant growth through the enhanced level of lipid peroxidation and reduction of antioxidants activities.
Seo, S.M.,Chung, W.K.,Cho, E.S. PRAGATI PRESS- INDIA 2014 Journal of environmental biology Vol.35 No.3
Since the first occurrence in 1982, red tides have been observed annually in Korean coastal waters in the form of harmful dinoflagellate Cochlodinium polykrikoides blooms. The distinction in the proposed method for red tide monitoring is the focus on the narrow stripe red tide at an early stage to allow for advanced actions. The distance graph between Head of Narrow Red tide (HNR) and location of the robot have suggested in reference to unknown searching area. With mapping and path planning, then, it can quickly keep tracking out even if the magnitude and direction of current flow was changed. The one-hundred times simulations of different situations were attempted to comparison by box plot both algorithms of speed by reaching the right side of simulation window. Consequently, the red tide tracking algorithm is based on the red tide probability map and the tracking & recovering path planner. Inputs to the algorithm include the measured flow velocities and the detection or non-detection state at each robot location. Furthermore, a USV (Unmanned Surface Vehicle) model is added to evaluate the effectiveness of the algorithm. This approach for red tide monitoring may lead to a breakthrough in the field of environmental surveillance.
Inhibitory effects of seaweed extracts on the growth of the vaginal bacterium Gardnerella vaginalis
Ha, Y.-M.,Choi, J.-S.,Lee, B.-B.,Moon, H.E.,Cho, K.K.,Choi, I.S. PRAGATI PRESS- INDIA 2014 Journal of environmental biology Vol.35 No.3
Of 44 species of seaweed screened for potential anti-Gardnerella vaginalis activity, 27 (61.4%) showed antimicrobial activity by the agar disk-diffusion method. Among them, the strongest activities against the pathogen were exhibited by Chlorophyta, with Ulva pertusa producing an 11.3-mm zone of inhibition at 5 mg disk(-1). The MIC values of U. pertusa extracts against both G. vagina/is KCTC 5096 and KCTC 5097, the main cause of vaginosis, were 312 mu g ml(-1), while the MIC values against both Candida albicans KCTC 7270 and KCTC 7965, the main cause of candidiasis, were 2.5 mg ml(-1). Against Lactobacillus gasseriKCTC 3173 and Lactobacillus jensenii KCTC 5194, members of the normal vaginal microflora, no inhibitory effect was seen even at 10 mg ml(-1). To identify the primary active compounds, a U. pertusa powder was successively fractionated according to polarity, and the main active agents against G. vaginalis KCTC 5096 were determined to be nitrogenous compounds (156 mu g ml(-1) of the MIC value). According to these results, it was suggested that extracts of the seaweed U. pertusa are valuable for the development of natural therapeutic agents for treating women with bacterial vaginosis.