• 센서학회지
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• 제10권1호
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• pp.80-85
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• 2001

$Hg_{1-x}Cd_xTe$(MCT)박막을 $CdSO_4$, $TeO_2$, 및 $HgCl_2$이 혼합된 수용액을 사용하여 음극 전착법으로 ITO 유리와 티타늄기판 위에 성장하였다. 주된 박막의 성장 조건 변수로 전착전위와 성장 온도를 고려하였다. 전착된 MCT 박막은 SEM사진과 XRD 및 EPMA측정을 통하여 박막의 성장 조건이 결정 구조와 성분 조성비에 미치는 영향을 분석 연구하였다. XRD 분석으로부터 전착된 MCT 박막은 cubic zinc blonde 구조임을 알 수 있었고, EPMA에 의한 성분조성비의 분석결과로부터 전착전위를 변화시키므로서 MCT의 성분 조성비를 조절할 수 있음을 알 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제18권4호
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• pp.584-589
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• 2005

This study was carried out to investigate the effects of different types of $\beta$-cyclodextrin ($\beta$-CD) treatments on chemical and sensory characteristics of cholesterol-reduced cream cheese. The cholesterol removal rates were 92.0% in cream cheese treated by powder $\beta$-CD, and 82.6% in cream cheese treated by crosslinked $\beta$-CD. Amounts of short-chain fatty acid and free amino acids were significantly lower in cream cheese made by crosslinked $\beta$-CD-treated milk, especially after 2 weeks storage, compared with those of no $\beta$-CD-treated control and cream cheese made by powder $\beta$-CD treated milk. Among rheological properties, cohesiveness was significantly higher, and gumminess in cream cheese made by crosslinked $\beta$-CD-treated milk was slightly lower than others. In sensory analysis, no difference was found in texture among treatments, while bitterness was lower in the early stage of storage, and overall quality was higher score, in cream cheese made by crosslinked $\beta$-CD-treated cream at 3 and 4 week storage, compared with those in control and powder $\beta$-CD-treated group. The present study indicated that crosslinked $\beta$-CD treatment resulted in an efficient cholesterol removal rate over 80% and a deceleration of ripening, which may provide a longer shelf life without significant adverse effects in chemical and sensory properties.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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• pp.427-428
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• 2008

New high efficiency green light emitting phosphorescent devices with emission layers of [TCTA/TCTA:TAZ/TAZ]:Ir$(ppy)_3$ have been fabricated and evaluated in this paper. Among the devices having different thicknesses of TCTA:TAZ mixed layer in the total 300$\AA$-thick host of TCTA(80$\AA$)/TCTA:TAZ (50~100$\AA$)/TAZ, the device with host of TCTA(80$\AA$)/TCTA:TAZ(90$\AA$)/TAZ(130$\AA$) showed the best electroluminescent characteristics with the current density of 95 mA/$cm^2$ and luminance of 25,000 cd/$m^2$ at an applied voltage of 10V. The maximum current efficiency was 52 cd/A under the luminance of 400 cd/$m^2$.

• Archives of Pharmacal Research
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• 제28권8호
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• pp.936-941
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• 2005

In this trial we assessed the effect of soluble alginates on murine cells. Mouse peritoneal monocytes were stimulated in vitro with a solution of alginate. The production of $TNF-\alpha$ and nitric oxide (NO), the expression of surface molecules CD80 and CD86, and the ability of monocytes to phagocyte bacteria were assessed, in order to evaluate the effect of alginate on cell functionality. We showed that mouse peritoneal monocytes stimulated with alginate produce NO and $TNF-\alpha$. In addition, alginate is able also to increase their phagocytic activity and to a lesser extent also to increase the expression of CD80. Even with different degrees, it implies that alginates per se act directly on immune response, being able to effectively stimulate proinflammatory activity. These findings corroborate the idea that alginates can represent interesting adjuvants to use to increase the efficacy of antigenic stimulation.

• 환경생물
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• 제20권4호
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• pp.303-308
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• 2002

3-weeks old Commelina was transferred to and grown in Hoagland solution ($\pm$ 100 $\mu{M}$ $Cd^{2+}$, 100 $\mu{M}$ $Cd^{2+}$ ＋ 100$\mu{M}$ $Ca^{2+}$, 100 $\mu{M}$ $Cd^{2+}$ ＋ 200 $\mu{M}$ EGTA) for two weeks and then a number of physiological activities was investigated. $Cd^{2+}$ reduced total chlorophyll content up to 29% at a week and 75% at two weeks. In the treatment of $Cd^{2+}$ ＋ $Ca^{2+}$, the total chlorophyll content was reduced to 29% at a week and 80% at two weeks. $Cd^{2+}$ reduced 24% of Fv/Fm after two weeks. In case of $Cd^{2+}$ ＋ $Ca^{2+}$, Fv/Fm was reduced 55% at a week, but after two weeks, the plants were almost dead and Fv/Fm could not be measured. When EGTA was treated with $Cd^{2+}$, the value of Fv/Fm was not affected. There were no differences of water potential between the control and the treatment of $Cd^{2+}$+EGTA toy a week, but in other treatments. water potential was reduced. $Cd^{2+}$ reduced about 21% of water potential and $Cd^{2+}$ ＋ $Ca^{2+}$ reduced 43% of water potential after two weeks. $Cd^{2+}$ inhibited 21% of photosynthetic activity at a week and 32% at two weeks. In case of photosynthetic activity, $Cd^{2+}$ ＋ $Ca^{2+}$ inhibited 58% at a week and 73% at two weeks. $Cd^{2+}$+EGTA inhibited 15% of photosynthetic activity at a week and 21% at two weeks. Similar results were found in stomatal conductance. From the above results, it was observed that the treatment of $Ca^{2+}$ with $Cd^{2+}$ induced more reduction of a series of physiological responses than those of the treatment of $Cd^{2+}$ alone. Therefore, it could be concluded that $Ca^{2+}$ did not reduce the toxicity of $Cd^{2+}$, but enhanced $Cd^{2+}$ -induced physiological toxicities, but EGTA induced an decrease of $Cd^{2+}$ -induced physiological toxicities.

• 한국산림과학회지
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• 제90권4호
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• pp.495-504
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• 2001

본 연구는 포플러 4개 수종의 체내 부위별 Cd과 Pb 축적 특성을 이해하고, 균근 형성이 중금속 흡수에 미치는 영향을 밝히고자 수행하였다. 외생균근균인 모래밭버섯균(Pisolithus tinctorius)을 현사시나무(Populus alba${\times}$glandulosa), 수원포플러(P. koreana${\times}$nigra var. italica), 양황철(P. nigra${\times}$maximowiczii), 이태리포플러(P. euramericana)의 삽수에 접종하여 화분에서 생장시켰다. 화분은 균근균 접종구와 비접종구로 구분하였으며, Cd은 토양에 0, 30, 80ppm으로, 그리고 Pb은 0, 50, 300ppm으로 처리하였다. 가을까지 야외에서 생육시킨 다음, 수확 후 총 생체량, Shoot/Root율, Cd과 Pb의 농도를 부위별로 측정하였다. 모래밭버섯균을 접종한 이태리포플러는 Cd과 Pb 처리 모두에서 비접종구보다 총 생체량이 증가하였으나, 나머지 세 수종에서는 접종 효과가 없었다. 균근균 접종으로 수원포플러와 이태리포플러의 S/R율은 증가하였다. 현사시나무는 포플러 4개 수종 중 Cd을 가장 높은 농도로 축적하였으며, 균근균 접종은 Cd 축적 농도를 4배정도 증가시켰다. 현사시나무는 잎, 줄기, 뿌리 중에서 잎에 가장 높은 농도로 Cd을 축적한 반면 다른 세 수종은 뿌리에 가장 높은 농도로 축적하였다. 그러나 Pb 축적 농도는 4개 수종 중에서 현사시나무가 가장 낮았다. Pb의 축적은 포플러 4개 수종모두뿌리에서 가장 높았으나 수원포플러는 잎에도 뿌리만큼 축적하였다. 균근균을 접종하지 않은 경우 Pb의 축적은 이태리포플러에서 가장 높았으나, 균근균을 접종할 경우 수원포플러에서 Pb 축적이 2배 이상 증가하였다. 결론적으로 현사시나무는 토양으로부터 Cd을 흡수하는데 효과적인 수종이며 이태리포플러는 Pb을 효과적으로 흡수한다. 균근균을 접종하면 현사시나무의 경우 Cd을 4배, 수원포플러의 경우 Pb을 2배 이상 더 흡수할 수 있고, 이 두 수종은 잎에 중금속을 축적하므로, 낙엽을 수거한다면 중금속 오염 토양의 생물 정화용으로 이용이 가능하다고 결론 짓는다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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• pp.245-248
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• 1998

Electrokinetic tests are conducted on laver contaminated with heavy metals to investigate the efficiency of the process in removing Cd, Pb, and Zn. The tests were operated at constant current, and operating time were 0 - 24 hours. The removal efficiency in electro-osmosis with open electrodes is time-dependent. The absorbed Cd, Pb and Zn were removed 50.94-95.75%, 80.78-81.96%, and 48.10-83.83% by the process.

• Corrosion Science and Technology
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• 제14권4호
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• pp.172-176
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• 2015

Austenitic stainless steel was investigated under cyclic loading in electrolytes with different chloride contents and pH and at different temperatures. The testing solutions were 13.2 % NaCl (80,000 ppm $Cl^-$) at $80^{\circ}C$and 43 % $CaCl_2$ (275,000 ppm $Cl^-$) at $120^{\circ}C$. In addition to S-N curves in inert and corrosive media, the fracture surfaces were investigated with a scanning electron microscope (SEM) to analyse the type of attack. The experimental results showed that a sharp decrease in corrosion fatigue properties can be correlated with the occurrence of stress corrosion cracking. The correlation of occurring types of damage in different corrosion systems is described.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.636-645
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• 2006

본연구는 독성물질을 함유한 납축전지와 NiCd전지를 대체할 수 있는 NiMH전지를 이용하여 철도시스템 비상전원용으로 사용위해 80Ah 전지를 병렬로 연결하여 160Ah의 NiMH전지 제작하였다. 160Ah 전지에 적합한 전극을 개발하기 위하여 3성분계의 전해질의 고율방전에 대해 평가하였다. 160Ah급 전지는 철도시스템 비상전원용으로 사용하기 위한 여러 가지 실험을 하여 평가를 하였다.

• Journal of Microbiology and Biotechnology
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• 제30권3호
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• pp.439-447
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• 2020

We investigated the immune restoration activity of Undaria pinnatifida fucoidan-rich extract in cyclophosphamide-induced immunosuppressed mice. C57BL/6 mice were intraperitoneally injected with 80 mg/kg of cyclophosphamide (CP) and orally administered with either drinking water (DW), red ginseng extract (RG), or one of three different doses of Undaria pinnatifida fucoidan-rich extract (DSU02 50, 100, and 150 mg/kg). After 14 days, liver, spleen, and whole blood were isolated from each animal. The frequencies of NK and CD³⁺, CD⁴⁺, and CD⁸⁺ T cells were significantly increased in splenocytes isolated from the DSU02 100 mg/kg and DSU02 150 mg/kg groups (NK1.1+, 5.4% or 4.9% vs 3.8%; CD³⁺, 39.3% or 37.9% vs 32.3%; CD4+, 22% or 20.2% vs 17.4%; CD8+, 12.7% or 11.6% vs 10.1%). NK cytotoxicity was enhanced in the DSU02-fed groups at all doses (CP-treated DW, 93.4%; RG, 107.2%; DSU02 50, 107.3%; DSU02 100, 107.3%; DSU02 150, 107.1%), and the proliferation of T cells (CD³⁺, CD⁴⁺, and CD⁸⁺) was also greater in the DSU02 100 mg/kg and DSU02 150 mg/kg administered groups compared with the unfed group. Plasma concentrations of TNF-α, IgM, and total IgG from the DSU02 150 mg/kg group were also significantly higher compared with the other groups (TNF-α: CP-treated DW - 21.5 pg/ml, DSU02 150 - 47.1 pg/ml; IgM: CP-treated DW - 82.9 ng/ml, DSU02 150 - 110.8 ng/ml; total IgG: CP-treated DW - 114.4 ng/ml, DSU02 150 - 162.7 ng/ml). We suggest that Undaria pinnatifida fucoidan-rich extract could be a promising candidate for a marine natural immune stimulator.