• 한국환경과학회지
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• 제9권5호
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• pp.437-441
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• 2000

A study on the removal of Pb ion from Pb-contaminated soil was carried out using ex-site extraction process. Tartaric acid (TA) and iminodiacetic acid sodium salt(IDA) as a washing agent were evaluated as a function of concentration reaction time mixing ratio of washing agent and recycling of washing agent. TA showed a better extraction performance than IDA. The optimum washing condition of TA and IDA were in the ratio of 1:15 and 1:20 between soil and acid solution during 1 hr reaction. The total concentrations of Pb ion by TA and IDA at three repeated extraction were 368.8 ppm and 267.5 ppm respectively. The recovery of Pb ion from washing solution was achieved by adding calcium hydroxide and sodium sulfide form the precipitation of lead hydroxide and lead sulfide and optimum amounts of sodium sulfide and calcium hydroxide were 7 g/$\ell$ for the TA washing solution and 4 g/$\ell$, 5g/$\ell$ for the IDA washing solution respectively. The efficiency of recycle for TA and IDA washing solution were 78.8% , 95.1%, and 89.2%, 96.6% at third extractions under $Na_2S$ and $Ca(OH)_2$, respectively.

• 한국의상디자인학회지
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• 제16권1호
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• pp.91-103
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• 2014

In this study, 70 national brands among men's wear brands were selected to examine linguistic characteristics of domestic national men's wear brand names. Linguistic factors which were used in national men's wear brand names were analyzed to understand their characteristics. Formative and semantic characteristics of each brand name were analyzed on the basis of the results from previous studies. It was found that long words with over four syllables are preferred than short words and single words in the form of noun are frequently used for domestic national men's wear brand names in terms of linguistic formality. English is most widely used in brand names, and European languages such as French, Spanish, and Italian are also used frequently under the influence of the country of origin. Next, the analysis result on the semantic characteristics of domestic national men's wear brand names showed that descriptive brand names are used to convey brand information directly and easily, or freestanding brand names which are absolutely irrelevant and newly coined words are chosen to create a characteristic image. In other words, brand names represent detailed business and product category of men's wear by forming a brand image of men's wear (ex. Man, Homme, Zio), and provide the information about properties and benefits related to the product such as dignity, masterpiece, and luxurious lifestyle to consumers by presenting the concept of the brand.

• 디자인학연구
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• 제13권2호
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• pp.111-121
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• 2000

탈구현상은 허구, 추상, 부재, 변형의 의미를 부각시키며 틀에 박힌 고정관념을 없애고 새로운 미의식을 추구하는 것이다. 이러한 현상은 1990년 이후 현대 패션에서 다양하게 전개되는데 마틴 마지엘라나 앤 드뮬리미스터, 레이 카와쿠보 등의 작품에서 잘 찾아 볼 수 있다. 이들의 작품은 변형과 왜곡, 부조화의 조화, 그리고 양면가치가 공존하는 미적인 특성을 지니고 있는데 이것은 미의 다양한 해석을 가능하게 하며 주관적인 미의식의 근거를 마련한다.

• Journal of Acupuncture Research
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• 제20권1호
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• pp.244-253
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• 2003

Objective : Interferon-alpha and Rivabirin are much used at the same time to treat Chronical C viral hepatitis. But interferon caused lots of unexpected side effects, Acupuncture Treatment for them will be an alternative plan. Methods : We first posed questions to a 4 year-old man who ha skin flare, fatigue, itching, insomnia, pronounced a diagnosis based on overall of symptoms and signs and then treated Acupuncture, Moxibustion and Electroacupuncture. We acupunctured a BL17, BL18, BL20 and removed it at once. We electroacupunctured at GV20, Yin tang(Ex-HN3) form 20 minutes, acupunctured at Bi yi(鼻翼, Extra-point), S36, P6. Pizhengge(脾定格) was acupunctured for 10 minutes. Results : The symptoms of fatigue, insomnia, itching are reduced after acupuncture treatments and they made a person keep interferon treatment on. Conclusions : We confirmed that acupuncture treatments make a patient of chronic C viral hepatitis reduce and improve side effects of interferon treatment. We should keep on studying the various and efficient method of acupuncture treatment to improve living quality and treatment efficiency of patients.

• 분석과학
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• 제11권6호
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• pp.429-435
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• 1998

유리 담즙산 및 담즙산의 글리신복합체를 dansyl cadaverine을 형광유도체화제로 사용하여 역상HPLC에서 분리하고 형광으로 검출할 수 있는 방법을 개발하였다. 8종류의 유리 및 복합체 담즙산을 dimethylformamide를 반응용매로 하여, amide결합 형성반응용 축합제로서 diethyl phosphorocyanidate를 사용하여 형광유도체화제인 dansyl cadaverine과 반응시켰다. 반응액중 일부를 20% methanol-water/acetonitrile을 기본 용리액으로한 직선 농도구배 조건의 HPLC에 의하여, 8가지 담즙산류를 완전히 분리할 수 있었다. 역상컬럼으로부터 용출된 담즙산의 형광유도체는 여기파장(${\lambda}ex.$) 340 nm, 형광파장 (${\lambda}em.$) 520 nm에서 측정하여 콜린산의 경우 약 10 pg(S/N 비=5)까지 측정할 수 있었다.

• 한국전기전자재료학회논문지
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• 제13권4호
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• pp.318-325
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• 2000

Dynamic behaviors of saturated-fatty acids $C_{16}$, $C_{18}$, $C_{20}$ and 8A5H with azobenzene were measured by displacement current method when the molecules are stimulated by pressure light and heat. When a barrier was compressed I-A, $\pi$-A isotherms of $C_{16}$, $C_{18}$, and $C_{20}$ were similar to each other but the displacement current of $C_{20}$ which has a long alkyl chain was relatively low. 8A5H showed the form of double liquid films and had a reversible reaction when a barrier was compressed and then expanded. When the molecules of 8A5H were stimulated by 365[nm] light the positive currents which were generated by the structural changes from trans to cis were measured. But the negative currents of the structural changes from cis to trans by 450[nm] light were too weak to detect. When the temperature of the water subphase was increased the surface pressures of the monolayers were increased early because of the thermal activations of the molecules and the double liquid films of 8A5H were disappeared above 40[$^{\circ}C$]EX>].

• 대한기계학회논문집
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• 제18권12호
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• pp.3377-3385
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• 1994

This paper introduces empirical correlations to obtain the gas/liquid flow rates and the spray drop size of low viscosity liquid injected by Y-jet twin-fluid atomizers. The gas flow rate is well correlated with the gas injection pressure and the mixing point pressure, based on the compressible flow theory. Similarly, the liquid flow rate is determined by the liquid injection pressure and the mixing point pressure, and a simple correlation for the liquid discharge coefficient at the liquid port was deduced from the experimental results. The mixing point pressure, which is one of the essential parameters, was expressed in terms of the gas/liquid flow rate ratio and the mixing port length. Disintegration and atomization mechanisms both within the mixing port and outside the atomizer were carefully re-examined, and a "basic" correlation form representing the mean diameter of drops was proposed. The "basic" correlation was expressed in terms of the mean gas density within the mixing port, gas/liquid mass flow rate ratio and the Weber number. Though the correlation is somewhat complicated, it represents the experimental data within an accuracy of ${\pm}15%$.EX>${\pm}15%$.

• Bulletin of the Korean Chemical Society
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• 제31권4호
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• pp.989-998
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• 2010

The titled dye of DBPI gives amplified spontaneous emission (ASE) with maximum at 580 nm upon pumping by nitrogen laser (${\lambda}_{ex}\;=\;337.1\;nm$). The ground state absorption cross section (${\sigma}_A$) and emission cross section (${\sigma}_E$) as well as effective emission cross section(${\sigma}^*_E$) have been determined. The electronic absorption spectra of DBPI were measured in ethanol and tetrahydrofuran at room and low temperature. DBPI displays molecular aggregation in water. The photochemical reactivity of DBPI was also studied in carbon tetrachloride upon irradiation with 525 nm light. The electrochemical investigation of DBPI dye has been carried out using cyclic voltammetry and convolution deconvolution voltammetry combined with digital simulation technique at a platinum electrode in 0.1 mol/L tetrabutyl ammonium perchlorate (TBAP) in two different solvents acetonitrile ($CH_3CN$) and dimethylformamide (DMF). The species were reduced via consumption of two sequential electrons to form radical anion and dianion (EE mechanism). In switching the potential to positive direction, the compound was oxidized by loss of two sequential electrons, which were followed by a fast dimerization and/or aggregation process i.e $EC_{dim1}EC_{dim2}$ mechanism. The electrode reaction pathway and the chemical and electrochemical parameters of the investigated compound were determined using cyclic and convolutive voltammetry. The extracted electrochemical parameters were verified and confirmed via digital simulation method.

• Journal of Forest and Environmental Science
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• 제32권3호
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• pp.311-322
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• 2016

Since forest trees form the basis of forest ecosystem, their prolong subsistence is crucial for various flora and fauna. The foremost challenges to sustain the forest ecosystem comprise of the declining forest tree population accompanied with structural changes due to afforestation and exploitation of forest area, environment changes, pests, pollution, and introgressive hybridization. For ex situ conservation approach, in vitro techniques encompass basic role for conserving tree genetic resources, predominantly where natural propagules like recalcitrant seed might not be appropriate for long-term conservation. The practice includes restricted growth techniques, conventional micropropagation, production and storage of synthetic seeds, and cryopreservation. Even though these practices have been applied chiefly to herbaceous species, but recently, woody species were also focused upon. Key conceptions, challenges and techniques for forest tree seed conservation are discussed briefly in this review with special emphasis on some successful cryopreservation approaches for long-term storage.

• 한국전기전자재료학회논문지
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• 제13권3호
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• pp.193-199
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• 2000

As an energetic focused-ion beam(FIB) is irradiated on an inorganic amorphous thin film a majority of ions without a reflection at surface, is randomly collided with constituent atoms in thin film. but their distribution exhibits generally a systematic form of distribution. In our previous paper we reported the concentration distribution and the transmission per unit depth of Ga$^{+}$ ions penetrated int a-Se$_{75}$ /Ge$_{25}$ thin film using the LSS-based calculation. In this paper these simulated results are compared with those obtained by a conventional profile code(ISC) and a practical SIMS profile. Then the results of LSS-based calculation have only a small difference with those of code and SIMS Especially. in the case of Ga$^{+}$-FIB with an accelerating energy of 15keV. the depth of the maximum ion concentration is coincident with each other in an error range of $\pm$5$\AA$.EX>.