• Journal of Wetlands Research
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• v.16 no.4
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• pp.433-441
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• 2014

It has been known that sewage containing high-concentration nitrogen affects the efficiency of municipal wastewater treatment plants harmfully. Therefore, research has been actively conducted to treat sewage containing high-concentration nitrogen. The current study has analyzed organic compounds, conducted foaming tests, and operated a laboratory-level nitritation reactor with the subjects of anaerobic digester supernatant and livestock wastewater which are the typical kinds of sewage containing high-concentration nitrogen. According to the results of analyzing organic compounds, soluble inert components form the largest part of anaerobic digester supernatant while particle biodegradable components occupy the most part of livestock wastewater. About the retention time proper for the reaction of nitritation, anaerobic digester supernatant shows 2 days while livestock wastewater indicates 6 days. It seems that the difference in the proper retention time is resulted from the difference of properties in organic compounds and ammonium nitrogen concentration. In addition, livestock wastewater's reactor foam is generated comparatively more than anaerobic digester supernatant's, but it tends to be eliminated faster. It is expected that the findings of this study can be utilized as foundational data afterwards in applying the reaction of nitritation to municipal wastewater treatment plants.

• Molecular & Cellular Toxicology
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• v.3 no.2
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• pp.107-112
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• 2007

o-Nitrotoluene is used to synthesize artificial dyes and raw materials of urethane resin. In this study, we have carried out in vitro genetic toxicity tests and microarray analysis to understand the underlying mechanisms and the mode of action of toxicity of onitrotoluene. TA1535 and TA98 cells were treated with o-nitrotoluene to test its toxicity by basic genetic toxicity test. Ames and two new in vitro micronucleus and COMET assays were applied using CHO cells and L5178Y cells, respectively. In addition, microarray analysis of differentially expressed genes in L5178Y cells in response to o-nitrotoluene was analyzed using Affymatrix genechip. The result of Ames test was that o-nitrotoluene treatment did not increase the mutations both in base substitution strain TA1535 and in frame shift TA98. o-Nitrotoluene has not increased micronuclei in CHO cells. But onitrotoluene increased DNA damage in L5178Y cell. Two-hundred two genes were initially selected as differentially expressed genes in response to o-nitrotoluene by microarray analysis and forty four genes among them were over 2 times of log fold changed. These forty four genes could be candidate biomarkers of genetic toxic action of o-nitrotoluene related to induction of mutation and/or induction of micronuclei and DNA damage. Further confirmation of these candidate markers related to the DNA damage will be useful to understand the detailed mechanism of action of o-nitrotoluene.

• Journal of Internet Computing and Services
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• v.12 no.6
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• pp.73-82
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• 2011

The location-based service is emerging again to the public attention. The location recognition environment up-to-now has been studied with its focus only on a person, an object or a moving object. However, this study proposes a location recognition model that serves to recognize and track, in real time, multiple passengers in a moving vehicle. Identifying the locations of passengers can be classified into two classes: one is to use the high price terminal with GPS function, and the other is to use the economic price compact terminal without GPS function. Our model enables the simple compact terminal to provide effective location recognition under the on-boarding situation by transmitting messages through an interface device and sensor networks for a vehicle equipped with GPS. This technology reduces transmission traffic after detecting the condition of a vehicle (being parked or running), because it does not require transmission/receiving of information on the locations of passengers who are confined in a vehicle when the vehicle is running. Also it extends battery life by saving power consumption of the compact terminal. Hence, we carried out experiments to verify its serviceability by materializing the efficient tracking system for passengers with the detection algorithm of a stopping vehicle proposed in this study. Moreover, about 200 experiments using the system designed with this technology proved successful recognition on on-boarding and alighting of passengers with the maximum transmission distance of 12 km. In addition to this, the running recognition tests showed the test with the detection algorithm of a stopping vehicle has reduced transmission traffic by 41.6% compared to the algorithm without our model.

• Applied Chemistry for Engineering
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• v.25 no.6
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• pp.570-576
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• 2014

Palmitoyl tripeptide (M330) showed higher antimicrobial activities than methyl paraben or phenoxy ethanol through minimum inhibitory concentration (MIC) test. However, when the M330 was added into cosmetic formulation, white precipitates formed due to the electrostatic interaction between M330 and carbopol (carboxy vinyl polymer) as a thickener in cosmetics, and the viscosity of cosmetics decreased sharply. Also, the antimicrobial activities of M330 in cosmetics became lower than those of methyl paraben or phenoxy ethanol. Thus, the encapsulation of M330 in ethosome vesicle was attempted in order to recover the declined antimicrobial activities of M330 in cosmetics and prevent the precipitates from forming. When ethosome-encapsulated M330 was added into cosmetics, the precipitates did not form, and the decrease in the viscosity of cosmetics was not large compared to the addition of unencapsulated M330. Challenge tests showed that antimicrobial activities against gram negative bacteria were improved by the encapsulation of M330, but the encapsulation was not effective against gram positive bacteria and fungus. A combination of M330 with EDTA showed synergistic inhibitory potential against C. albicans. After coencapsulation of M330 and EDTA in ethosome, antimicrobial activities proved to be higher than those of unencapsulated M330 and EDTA.

• Korean Journal of Food Science and Technology
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• v.42 no.1
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• pp.63-68
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• 2010

The use of deodorizing plant products such as persimmon leaves, pine needles and fennel seeds to mask the characteristic odor of kimchi has been proposed. Therefore, in this study, the effect of deodorizing plants on kimchi fermentation and the profile of volatile flavor compounds was investigated. During sensory evaluation tests of sour and fermentation odors of kimchi, plant extract-added kimchi showed higher sensory scores than chopped plant-added kimchi. Additionally, kimchi containing pine needle extracts (0.3-0.6%) and fennel seed extracts (0.05-0.1%) showed higher sensory scores than untreated kimchi. In addition, pine needle extract and fennel seed extract had a significant influence on kimchi fermentation characteristics such as pH, total acidity and the concentration of lactic acid bacteria. The volatile flavor compounds of kimchi and deodorizing plant extracts were also analyzed using GC/MS and the correlation of volatile flavor compounds in kimchi, plant extracts and plant-added kimchi was examined. The results revealed that the sour and fermentation odors of kimchi were reduced using deodorizing plant extracts by changing the kimchi fermentation characteristics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.8
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• pp.5111-5120
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• 2015

In this paper, learn how to establish a proper lifestyle and health management through professional and systematic health education for children and young people, and laid the foundations for lifelong health, and to present the saeroeun paradigm complements the problems of school health education This study aimed to examine the effectiveness of the human body exploration camp program on elementary students in health promotion aspect. Survey was done pre-, post- and followup- tests for 61 participants in the camp. The evaluation consisted of 53 questionnaires multiple-choice written test on the changes of knowledge and attitude. Factor analysis and reliability analysis were used to SPSS WIN18.0 verify questionnaire's reliability and validity, and paired t-test were carried out in order to analyze knowledge and shift in attitude. In addition, regression analysis was carried out in order to the relation between the satisfaction, knowledge and attitude. By this study, we showed as follows. First, knowledge were increased post- than pre-test, follow up- than pre-test(p<0.01). Second, shift in attitude changed positively post- than pre-test(p<0.01), follow up- than pre-test(p<0.05). Third, satisfaction was closely related to shift in attitude(p<0.01). Therefore, it suggested that the implement of human body exploration camp for elementary students could be an alternative strategy in health education.

• Journal of the Korea institute for structural maintenance and inspection
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• v.15 no.3
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• pp.186-194
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• 2011

The reinforced concrete beam-column connections are in lack of constructability and are likely to show anchorage failure because of the complex details of joint regions. Under seismic loads, a destruction of the column or the beam-column joint leads to collapse of the whole structures. For this reason, the safety of structures has to be guaranteed by following procedures which are based on the strong column-weak beam design concept: 1) failure of beam by generating plastic hinge in the beam maintained a certain distance from the surface of column, 2) failure of column or beam-column joint. In this study, headed bars were used as longitudinal reinforcements of beam and joint reinforcements in order to improve the strength and constructability of joint and to relocate plastic hinge. The finite element analyses (FEAs) were performed to the reinforced concrete beam-column joints utilizing headed bar reinforcements. To verify the availability of the analysis models, the FEAs for experimental tests performed by previous researchers were conducted and compared with the experimental results. Additional variables are also considered to confirm the excellence of headed bars. Analysis results indicate that the constructability of beam-column connections can be improved by using headed bars for the full anchorage of longitudinal reinforcements of beam under similar structural performance. In addition, the plastic hinge was relocated to the intended place by using headed bars as joint reinforcements. Under cyclic displacement loading, the energy dissipation capacity and ultimate stress were increased and the decrease in stiffness was minimized.

• Journal of the Korea institute for structural maintenance and inspection
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• v.18 no.1
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• pp.174-182
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• 2014

To monitor the wind-induced responses of buildings, conventional real-time kinematic (RTK) methods based on two global positioning system (GPS) receivers (e.g., a reference and a rover) are widely applied. However, these methods can encounter problems such as difficulty in securing and maintaining a space for a reference station. With the recently developed virtual reference station (VRS)-RTK approach, the position of a structure can be measured using only a rover receiver. In this study, to evaluate the applicability of VRS-RTK methods in monitoring the lateral structural responses of frame structures, we performed free vibration tests on a one-story frame model (the first natural frequency of 1 Hz) and a three-story frame model (the first natural frequency of 0.85 Hz). To assess the reliability of the displacement and acceleration responses measured by the GPS, we performed a concurrent measurement using laser displacement sensors and an accelerometer. The accelerometer results were consistent with the GPS measurements in terms of the time history and frequency content. Furthermore, to derive an appropriate sampling rate for the continuous monitoring of buildings, the errors in the displacement responses were evaluated at different GPS sampling rates (5, 10, 20 Hz). The results indicate that as the sampling rate increased, the errors in the displacement responses decreased. In addition, in the three-story model, all modal components (first, second, and third modes) could be recorded at a sampling rate of 20 Hz.

• Journal of Pharmacopuncture
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• v.18 no.3
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• pp.19-31
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• 2015

Objectives: Correlations of the levels of the nonspecific inflammatory markers C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) and of the coagulation marker fibrinogen with the treatment period of wheel balanced cancer therapy were determined. Methods: Electronic charts of stage IV cancer patients hospitalized from February 1, 2008, to November 30, 2013, were reviewed retrospectively. Patients whose laboratory follow-up tests included at least two data points for at least one marker were included. Patients receiving chemotherapy or radiotherapy or having Eastern Cooperative Oncology Group (ECOG) levels exceeding 2 were excluded. Correlations of the markers with the length of treatment for treatment periods ${\geq}21$ and ${\leq}20$ days were determined by gender and whether or not surgery had been performed. Results: Analyses of the CRP and the ESR revealed a higher proportion of patients with stable marker levels than with increased or decreased levels. Also, only the ESR in female and the CRP in male groups had higher proportions of patients with stable marker levels than with increased or decreased levels. The ${\geq}21$ day group had a higher proportion of patients with stable CRP and ESR levels than the ${\leq}20$ days group. Only the ESR in female and the CRP in male groups had higher proportions of patients with stable marker levels in the ${\geq}21$ day than in the ${\leq}20$ day group. In addition, only the CRP in the surgery group and the ESR in the non-surgery group had higher proportions of patients with stable marker levels in the ${\geq}21$ day group than in the ${\leq}20$ day group. Conclusion: For stage IV cancer patients at hospitals that offer Korean medicine, more than 21 days of long-term wheel balanced cancer therapy (WBCT) should help maintain the CRP and the ESR levels and should have a favorable effect on the survival rate.

• Korean Journal of Food Science and Technology
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• v.52 no.3
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• pp.263-273
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• 2020

In this study, in order to confirm the ameliorative effects of onion (Allium cepa L.) flesh and peel on amyloidbeta (Aβ)-induced cognitive dysfunction, we evaluated their in vitro neuroprotection and in vivo cognitive functions. As the result of in vitro neuroprotection, the protective effect of the ethyl acetate fraction of onion flesh (EOF) on Aβ-induced cytotoxicity was similar to that of the ethyl acetate fraction of onion peel (EOP). In the behavioral tests, the EOF and EOP effectively improved the Aβ-induced learning and memory impairments. For this reason, it could be concluded that the EOF and EOP improved the antioxidant activities (superoxide dismutase, oxidized glutathione/total glutathione, and malondialdehyde) in brain tissue. In addition, the EOF and EOP effectively activated mitochondrial functions by protecting the mitochondrial membrane potential, ATP, mitochondria-mediated protein (BAX and cytochrome c), and caspase 3/7 activities. The EOF and EOP also improved the cholinergic system (acetylcholinesterase and acetylcholine). Therefore, we suggest that onion could be used for management of Aβ-induced cognitive dysfunction.