• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.5
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• pp.615-625
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• 2023

This study evaluated the bacteriological safety of seawater and abalone produced in Uisin-myeon, Jindo-gun from September 2020 to December 2022 and calculated the effect of inland pollution sources on seawater and abalone. We surveyed 33 stations for seawater, 4 stations for abalone, and 7 stations for discharge water of major inland pollutants. We analyzed the coliform group, fecal coliform and Escherichia coli (E. coli) as bacteria indicators. In 924 seawater samples, the geometric mean of the coliform group and fecal coliform were <1.8-5.6 MPN/100 mL and <1.8-2.7 MPN/100 mL, respectively. The estimated 90^th percentile range for the coliform group and fecal coliform were <1.8-42 MPN/100 mL and <1.8-8.4 MPN/100 mL, respectively. The fecal coliform and E. coli levels for 107 abalone were <18-460 MPN/100 g and <18-78 MPN/100 g respectively. Moreover, the analyzed standard plate count was <30-7,700 CFU/g. The fecal coliform level and diffusion area in 7 inland pollutants were <1.8-3,300,000 MPN/100 mL and 2-2,500 m, respectively. The bacteriological safety of seawater and abalone in Uisin-myeon, Jindo-gun, was demonstrated to be a designated area according to Korean standards, a conditionally approved area per US standards, and Class A according to EU standards.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.04a
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• pp.76-77
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• 2009

In this paper, We have studied Electron Transport Layer(ETL) in the New Organics applied to Red phosphorescent organic light-emitting devices. The structure of ITO/2-TNATA(15nm)/CBP;$Ir(piq)_3$/DPVBi(30nm)/New ETL(60nm)/LiF(0.5nm)/Al(100nm) has been used, measured changing doping concentration of EML. The results of OLED turn-on voltage at 2.2V, and Maximum Luminance at 2.8V was $1000cd/m^2$. This high luminance at low voltage results from a high electron. conduction of the new electron transport layer.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.04a
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• pp.25-26
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• 2008

In this paper, the white organic light-emitting diode(OLED)was fabricated using the DPVBi of blue emitting material and a rubrene of orange color of fluorescent dye by vacuum evaporation processes. The device structure of OLED was Glass/ITO/2T-NATA(15nm)/NPB(3nm)/DPVBi(3nm)/DPVBi rubrene[2%](10nm)/DPVBi(25nm)/$Alq_3$ or New-ETL(60nm) /LiF(0.5nm)/ Al(100nm). The device with the $Alq_3$, layer shows orange color, and the luminance of 1000cd/$m^2$ at an applied voltage of 10.4V. On the other hand, the New-En layer results in white color, CIE coordinates of (0.327, 0.323), and the lowered driving voltage of 5V for achieving the same luminance value.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.258-261
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• 2006

The structure of small launch vehicle can be divided into engine section and payload section. This paper introduces modal test of the payload section of small launch vehicle which is composed to satellite, PLA (Payload Adapter), VEB (Vehicle Equipment Bay), KMS (Kick Motor Support) and KM (Kick Motor). From this test, dynamic properties of the 2nd stage structure of small launch vehicle can be obtained. In this test, to simulate free-free boundary condition, test object was hung by 4 bungee cords and excited by using impact hammer Modal test data are analyzed by using TDAS(Test Data Analysis Software). As the result, modal parameters and mode shapes below 100Hz of the 2nd stage of small launch vehicle were identified.

• Journal of the Korean Dietetic Association
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• v.20 no.3
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• pp.174-182
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• 2014

This study compared total sodium amounts in 'Healthy Restaurant for Sodium Reduction' menu items located in Seoul, Chungcheong, and Gyeongsang in 2011 and 2012. In addition, this study explored reduced sodium cooking methods in 'Healthy Restaurant for Sodium Reduction'. This study monitored and collected menu samples from a total of 103 restaurants participating in 'Healthy Restaurant for Sodium Reduction' in 2011 and 2012. We also surveyed restaurant employees to identify reduced sodium cooking methods in 2012. The results showed significant reductions in total amounts of sodium in menu items of restaurants located in Seoul, Chungcheong, and Gyeongsang between 2011 ($310.8{\pm}156.8mg/100g$) and 2012 ($211.6{\pm}110.3mg/100g$). Amounts of sodium in all seven foodgroups showed significant reductions between 2011 and 2012: 'Gook/Tang' (from $226.6{\pm}127.7mg/100g$ to $168.5{\pm}74.3mg/100g$), 'Jjigae/Jeongol' (from $385.8{\pm}111.7mg/100g$ to $257.1{\pm}82.53mg/100g$), 'Noodle/Dumpling' (from $263.8{\pm}116.9mg/100g$ to $194.1{\pm}55.6mg/100g$), 'Gui' (from $390.3{\pm}120.6mg/100g$ to $258.8{\pm}92.7mg/100g$), 'Steamed dish' (from $305.3{\pm}124.3mg/100g$ to $175.6{\pm}76.6mg/100g$), 'Bob' (from $273.7{\pm}162.5mg/100g$ to $167.1{\pm}93.1mg/100g$), and 'Stir-fried dish' (from $368.6{\pm}116.6mg/100g$ to $219.0{\pm}72.4mg/100g$). The survey results showed that responses for 'Reducing salt amount' were 75.7%, responses for 'Using enchovy stock, shrimp, radish, or fruit soup' were 64.1%, and responses for 'Liking the taste because it is bland' were 50%. This study indicates that 'Healthy Restaurant for Sodium Reduction' nutrition policy was successful for reducing sodium contents of restaurant menu items, and also consumers were satisfied with the tastes.

• The Korean Journal of Mycology
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• v.9 no.1
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• pp.1-6
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• 1981

The effect of gamma irradiation on production and accumulation of aflatoxin on natural substrate (barley) by Aspergillus parasiticus NRRL 2999 has been studied in some detail. Gamma irradiation at five doses, 0, 50, 100, 200 and 400 Krad was applied to the grain either soon after moisture equilibration (3 days after inoculation) or 10 days later (13 days after inoculation). And the results were as in the followings. 1. Increase in moisture content from 17% to 25% greatly increased the aflatoxin concentration, especially at zero irradiation dose. 2. Prolongation of the incubation period prior to irradiation from 3 to 13 days resulted in greater accumulation of aflatoxin. 3. Two hundreds Krad applied 13 days after inoculation on barley stored at 25% moisture (100% RH) and $25^{\circ}C$ led to higher aflatoxin production than 100 Krad or even 50 Krad. 4. The relative proportion of the principal aflatoxins in relation to irradiation showed that aflatoxin G was elaborated at a significantly higher rate than aflatoxin B.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.53 no.3
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• pp.417-422
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• 2020

We developed a seasoning sauce using hot water extracts from anchovy Engraulis japonica fish sauce processing by-products. A temperature of 121℃ was maintained for 120 min and the resulting amino acid content, salinity, and pH were 183.6 mg/100 g, 6.86, and 17.4 g/100 g, respectively. Radish juice, sea tangle Saccharina japonica extract, and mushroom Lentinula edodes were added to improve the flavor. The glutamic acid content of the extract mixed with 10% sea tangle extract was 88.87 mg/100 g and the 5'-GMP (guanine 5'-monophosphate) content of the extract mixed with 10% mushroom extract was 9.67 mg/ g. This study was conducted to determine optimal processing conditions for seasoned products using response surface methodology (RSM). The optimal conditions for X₁ (sea tangle extract concentration) and X₂ (mushroom extract concentration) were 15.0% and 5.0%, respectively, and the predicted values of the multiple response optimal conditions were Y₁ (5'-GMP: 17.36 mg/100 g) and Y₂ (glutamic acid: 157.35 mg/100 g). Under the optimal conditions, the experimental values of Y₁ and Y₂ were 17.32 mg/g and 155.36 mg/100 g, respectively, which are similar to the predicted values. We confirmed the feasibility of developing a seasoning sauce using hot water extract from anchovy fish sauce processing by-products and additives.

• Applied Chemistry for Engineering
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• v.8 no.4
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• pp.589-594
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• 1997

Superconducting $YBa_2Cu_3O_y$ thin films were prepared at the deposition temperature of $650^{\circ}C$ under oxygen partial pressure of 0.0126 Torr on Si(111) and SrTiO3(100) substrates by chemical vapor deposition technique using $\beta$-diketonates of Y, Ba and Cu as source materials. The thin film fabricated on $SrTiO_3(100)$ had a $T_{c,onset}$ of 91K and $T_{c.0}$ of 87K. The thin film prepared on Si(111) had a $T_{c,onset}$ of 91K but didn't have a $T_{c.0}$ at liquid nitrogen boiling point(77.3K). Dense and two-dimensionally well alligned microstructure was developed for the film deposited on $SrTiO_3(100)$ substrate whereas a relatively porous and randomly distributed microstructure was developed for the film prepared on Si(111) substrate.

• Applied Chemistry for Engineering
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• v.27 no.3
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• pp.330-334
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• 2016

Because several wood barks are massively produced in the forest area of Chungbuk province, it is required to develop technologies for their effective utilization. In this study, three kinds of barks from Robina pseudoacacie, Pinus densiflora, and Castanea crenata were used to remove water-soluble cadmium ions having 10, 20, 50, and 100 mg/L concentrations in each batch experiments, and R. pseudoacacie bark was selected as the most excellent biosorbent. Also, treatments with various acids and bases were performed to increase the removal efficiency of 100 mg/L cadmium ions using R. pseudoacacie bark as a biosorbent. When R. pseudoacacie bark was modified with 0.5 M KOH, the relatively high removal efficiency and adsorption amount of cadmium ions were obtained. In addition, when 9 M KOH-treated R. pseudoacacie bark was used for 30 min, the highest removal efficiency of 100 mg/L cadmium ions was 84.3%. Therefore, this experimental result can be effectively used as an environmental-friendly bioremediation technology to remove cadmium ions existed with various concentrations in water bodies and soils.

• Journal of Korean Society of Steel Construction
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• v.10 no.2 s.35
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• pp.153-160
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• 1998

The sectional dimensions and initial crookedness of the RHS(rectangular hollow section, ${\boxe}-75{\times}75{\times}3.2,\;{\boxe}-100{\times}100{\times}4.2,\;{\boxe}-125{\times}125{\times}6.0$) were measured. The axial compressive strength tests for columns with slenderness $46{\sim}84$ were performed as well as stub tests and tensile tests. FEM analysis was also used. The measurement shows that the errors of sectional dimensions are negligible. For the column length corresponding to ${\lambda}=100$, the initial crookedness with the 2.5% probability estimated from the measured results is 1/490, 1/1121 1/1395 for each section respectively. The yield strengths obtained from tensile test are higher than the specified minimum value by more than 30%. The column test shows that the maximum axial resistances are almost same as, or a little higher than the FEM results and the specified strength curves of AISC Specification and Eurocode, when the maximum strengths from the stub tests are used as the yield strength of the steel. But the test results show much higher column strength than those specified in the Standard and Code, when the specified minimum yield strength of the steel is used.