• Textile Coloration and Finishing
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• v.25 no.3
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• pp.153-158
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• 2013

In this study, pyrene based chemosensor was synthesized by two step reaction. The chemosensor showed that high selectivity toward fluoride in DMSO. The fluorescence intensity was drastically increased by binding between chemosensor and fluoride ion. Absorption and fluorescence spectra were obtained by UV-Vis spectrometer and fluorescence spectrophotometer. The binding ratio between chemosensor and fluoride ion was also investigated by job's plot method and Benesi-Hildebrand plot. The HOMO/LUMO energy levels and electron distribution were calculated and simulated by Material studio 6.0 Package.

• Toxicological Research
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• v.29 no.2
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• pp.137-142
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• 2013

Arsenic (As) is a well-known human carcinogen and its dietary exposure has been found to be the major route of entry into general population. This study was performed to assess the body levels of As and their associated factors in Korean adults by analyzing total As in urine. Urine and blood samples were collected from 580 adults aged 20 years and older, who had not been exposed to As occupationally. Demographic information was collected with the help of a standard questionnaire, including age, smoking, alcohol intake, job profiles, and diet consumed in the last 24 hrs of the study. Total As, sum of As(III), As(V), monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), in urine was determined using atomic absorption spectrometer involving hydride generation method. The geometric mean concentration of total As in urine was $7.10{\mu}g/L$. Urine As was significantly higher in men ($7.63{\mu}g/L$) than in women ($6.75{\mu}g/L$). Age, smoking, alcohol consumption, and job profiles of study subjects did not significantly affect the concentration of As in urine. No significant relationship was observed between body mass index (BMI), Fe, and total cholesterol in serum and urinary As. Urine As level was positively correlated with seaweeds, fishes & shellfishes, and grain intake. A negative correlation between urinary As level and HDL-cholesterol in serum and meat intake was observed. Overall, these results suggest that urinary As concentration could be affected by seafood consumption. Therefore, people who frequently consume seafood and grain need to be monitored for chronic dietary As exposure.

• Korean journal of food and cookery science
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• v.7 no.4
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• pp.87-91
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• 1991

This study was performed to examine the mineral binding properties of total dietary fiber (TDF) and acid detergent fiber (ADF) from Job's tears (Yulmoo: Coix lachryma-jobi L. var. Ma-yuen Stapf.) bran. The endogenous Ca and Fe contents of dietary fiber extracted from Yulmoo bran were measured by atomic absorption spectrophotometer (AAS). Ca contents were 40, 118.6$\mu\textrm{g}$ Ca/g TDF and 131.6 $\mu\textrm{g}$ Ca/g ADF. Fe contents were 1,219.7 $\mu\textrm{g}$ Fe/g TDF and 277.5 $\mu\textrm{g}$ Fe/g ADF. The calcium binding capacities of dietary fiber at pH 5.0, 6.0, 7.0 were 50.77, 77.57, 86.64% for TDF, 40.27, 51.42, 40.90% for ADF, respectively. The iron binding capacity of dietary fiber at pH 5.0~7.0 was 95~97% for TDF and 85~95% for ADF.

• Food Science and Preservation
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• v.13 no.4
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• pp.477-482
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• 2006

This study was carried out to evaluate the effect of the masting temperature on the phycochemical properties of the roasted Job's tears. Raw seeds were roasted for 20 min at 150, 170, 190, 210 or $230^{\circ}C$, were milled and extracted with hot water. The L and a values of the powder were sharply decreased or increased at the masting temperature of above $190^{\circ}C$, respectively. The b value was maximum at $190^{\circ}C$. Water absorption capacity of the powder and browning index of the extract were proportionally increasing with increasing the masting temperature. The pH of the extracts was decreased at the masting temperature of above $190^{\circ}C$. Total sugar content of the extract tended to be decreased until $170^{\circ}C$ and then be increased from $190^{\circ}C$. Content of phenolic compound of the extract was increased at the masting temperature of above $210^{\circ}C$. At the sensory evaluation of the extract, aroma and taste of samples masted at $170^{\circ}C$ and above $190^{\circ}C$, respectively were higher than those masted at the others. Overall acceptability of the extract was highest at $190^{\circ}C$.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.03a
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• pp.36-36
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• 2011

We synthesized new dye sensor based on indole compound. Through the UV-vis absorptions, we analyzed chemosensing properties to explain metal binding properties. The peak absorptions increased at 472 nm when added metal cations($Cd^{2+}$, $Cu^{2+}$, $Hg^{2+}$, $Fe^{2+}$, $Zn^{2+}$, $Ni^{2+}$ and $Cr^{3+}$) and gradually decreased the peak at 516 nm. Thus, this UV-Vis absorption behavior clearly showed the metal binding reaction. To measure energy level of used dye sensor, HOMO/LUMO energy value was calculated with cyclovaltagramm(CV) and using computational calculation method, in which we estimated the optimum structure of dye sensor. CV and computational calculation method, both compared to find suitable geometric structure. (with almost same energy values.) From the computational calculation, dye sensor has plane structure. So, Amine and ketone in the dye sensor faced each other and makes position to bind metal cations. In addition, these positions was supported pull-push electron system and generated MLCT process, when the dye sensor was bonded with the metal cations and resulted chemosensing properties. Through the electrochemical and computational calculation method analyze, we proposed the chemosensing principles that the dye sensor bind the metal cation between ketone and amine. Finally, the formation type of metal ion bindings was determined by Job's plot measurements.

• Journal of Fashion Business
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• v.9 no.2
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• pp.40-56
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• 2005

The purpose of this research is to analyze the patterns on consuming basic skin makeup products of female college students, and to provide basic information to understand the patterns of ordinary consumers. The survey was included 283 female students from 5 colleges located in metropolitan area of Seoul. The survey data were analyzed by one-way ANOVA, Duncan test, T-test, chi-scuare-test methods. The results are as follows : 1. 60% of the college students of metropolitan area are doing basic skin makeup for aesthetic reasons in most cases, eye makeup is regarded the most important part, so 92% students have experienced to buy imported cosmetic products because of it's better absorption to skin. 2. Significant correlations were found between the skin types and dissatisfaction about foundation after using. 3. According to demographic variables, significant correlations were found between grade and makeup extent, grade and the reasons why they use imported products. 4. According to demographic variables, significant correlations were found between grade and foundation types used, monthly average living expense and purchasing channels, grade and purchasing channels, price level of the currently using face powder and monthly average living expense, monthly average spending for cosmetic products and level of wealth, price level of the currently using foundation and monthly average living expense. 5. According to demographic variables, significant differences were found in monthly average living expense, monthly average spending for cosmetic product, mother's job, grade.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.370-379
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• 2020

This study examined the growth characteristics and competitive advantages of Korea's tourism industry compared to other Northeast Asian countries using the Balassa Indices and Shift-Share method. The analysis results showed that the growth of Korea's tourism industry over the past decade was due mainly to external factors, such as the growth of the global economy and the expansion of the tourism sector, while the role of growth momentum of the tourism industry itself was insignificant. Employment in Korea's tourism industry has shown relatively higher increasing rates compared to the rates of the total amount of sales and value-adding. This appears to be caused by the decreased absorption of the labor force in the tourism industry due to the overall capacity of job creation. (Ed note: This sentence was unclear. Please check the edits.)The competitive advantage of Korea's tourism industry has been strengthened over the past decade, but it is still inferior to other countries. The travel account balance showed that the economic size of the Chinese tourism sector had grown rapidly over the past decade, but the competitive advantage of the sector has been weakened. On the other hand, the economic size of the Japanese tourism sector has shown sluggish growth, while its competitive advantage has been strengthened significantly.

• Journal of Preventive Medicine and Public Health
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• v.14 no.1
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• pp.111-116
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• 1981

Economic development of Korea brought rapid progress and expansion of her industries. Accordingly, number of workers who have been exposed to hazardous metals are increasing. For better understanding the significance of on the job human metal pollution, a total of 22 solderers among autoworkers and 28 controls among medical students was purposively selected as samples of the study. From their blood, concentrations of cadmium and lead were measured with atomic absorption spectrophotometer, and to compare with statistical indices of controls those of solderers were sumarized as follows. 1. Each frequency distribution of cadmium and lead concentration in blood of solderers was more positively skewed showing non-Gausian distribution. 2. Interindividual variation of lead concentration in blood of solderers was markedly revealed. 3. Each mean of cadmium and lead concentration in blood of solderers was higher than that of controls(Cd;p<0.01, Pb;p<0.01). 4. Relative ratio of cadmium concentration in blood of solderers to that of controls was 1.36 by arithmatic mean and 1.39 by geometric mean. Relative ratio of lead concentration in blood of solderers to that of controls was 1.53 by arithmatic mean and 1.30 by geometric mean. 5. It was shown that concentration of lead is slightly correlated with that of cadmium both in solderers and controls(solderers; p<0.1, controls;p<0.1).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.4
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• pp.493-503
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• 2021

In this study aviation authority officials were classified into four cultural groups according to culture theory, and then questioned to determine the effects of cultural bias on their social acceptance of a new air traffic flow management system. Based on previous studies, cultural biases were categorized as egalitarianistic, individualistic, fatalistic, and hierarchical, and social acceptances were considered to be influenced by four variables, that is, perceptions of usefulness, work attitude, intention to use, and behavior (job absorption). Empirical analysis showed that hierarchy had a significant positive effect on social acceptance, and egalitarianism was found to have a significant positive effect on social acceptance with 95% credibility. We propose the organizational culture of Korean government be changed to accept the diverse opinions of government officials during the implementation phase of the new system recommended by ICAO.

• Journal of Yeungnam Medical Science
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• v.15 no.2
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• pp.224-236
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• 1998

A study was conducted to investigate the blood lead and zinc protoporphyrin(ZPP) concentrations of the underground parking lot workers who exposed to vehicular exhaust aerosols which contained lead. The blood samples were collected from 25 study subjects of underground parking lot and from 33 controls in Taegu, from July to October, 1997. And also the related factors to the blood lead and ZPP concentrations were investigated. Blood lead concentration and ZPP concentration were measured by flameless furnace atomic absorption spectrophotometer (1L.551) and hemetofluorometer, respectively. The mean blood lead concentrations of study subjects and controls were $23.10{\pm}20.77{\mu}g/dl$ and $12.99{\pm}12.71{\mu}g/dl$, respectively(p<0.05), and the mean blood ZPP concentrations of study subjects and controls were $40.72{\pm}9.46{\mu}g/dl$ and $38.21{\pm}10.97{\mu}g/dl$, respectively. No significant correlations were observed between the blood lead concentration of the study subjects and their job duration and between blood ZPP concentration of the study subjects and their job duration. There were no statistically significant differences in the blood lead concentration and the blood ZPP concentration of smokers and nonsmokers. In multiple regression analysis on blood lead concentration of the study subjects and controls, occupation was a only significant dependent variable. In case of bood ZPP concentration, age was a only significant dependent variable in the study subjects and controls.