• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.185-187
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• 2001

해조류는 다른 수산생물에 비해 그 용도가 상대적으로 낮고 과학적인 연구가 부족한 실정이다. 그러나 최근 구미선진국 및 일본 둥지에서는 해조류가 건강식품 생리활성 물질의 원료로서도 각광을 받고 있으며, 식량자원으로서도 재평가되고 있다. 이 같은 해조류는 비타민 A, B$_1$, B$_2$, C, D, E와 많은 미네랄이 함유되어 있으며 특히, 칼슘, 요오드, 철, 아연 등과 같은 필수 미량 원소의 함량이 높고, 특징적인 생리활성을 나타내는 성분들을 포함하고 있다. 이들 중 김(Laver)은 알래스카만에서 캘리포니아주까지 북동부에 자라고 전 세계 50여종 정도 분포하며, 그 중 한국의 남해안 일대에는 10여종 정도가 분포하교 있다. (중략)

• Analytical Science and Technology
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• v.16 no.1
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• pp.25-31
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• 2003

Chromium(III) picolinate, a highly bioavailable compound, is known to be used for supplementing essential chromium(III) to human beings and animals. Two different methods were used to synthesize chromium(III) picolinate. The synthetic products were characterized by elemental analysis, FTI-IR, high performance liquid chromatography (HPLC) and MALDI-MS.

• Journal of Korean Society of Forest Science
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• v.80 no.2
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• pp.177-186
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• 1991

The heavy metal contents accumulated in the birds organ were analyzed by use of 10 species of birds to investigate the environmental pollution of the birds inhabited in Mt. Chiri. Heavy metal concentrations in bird organs, e.g. muscle, liver, kidney, lung and heart were analyzed for 10 species of the birds. 1. Contents of some heavy metal elements such as Fe, Zn, Cu and Mn were similar level compared with any other district. But contents of some heavy metal elements shch as Pb, Cd and Hg were comparatively lower level than those in any other district. 2. The contents of heavy metal accumulation in the muscle of the bird organs were detected much more from the migrants than the resident birds ; the resident bird, Phasianus colchicus were detected to contain $0.01{\mu}g/g$ og Hg and $0.05{\mu}g/g$ of Cd, but in the migrant bird, Turdus dauma they were detected to contain $0.17{\mu}g/g$ of Hg and $0.08{\mu}g/g$ of Cd. 3. The contents of lead were scarcely detected in the muscle of 10 species of birds, but it was highly detected from the hunting (meat-eating) birds such as Phasianus colchicus ($0.17{\mu}g/g$) and Streptopelia orientalis ($0.11{\mu}g/g$). Generally, the concentration of heavy metals of the analyzed birds was more mercury than Cadmium.

• Journal of Korean Society of Forest Science
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• v.83 no.1
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• pp.6-11
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• 1994

Three different types of tissue taken from three game birds such as Ring-necked Pheasant, Rufous Turtle Dove, Mallard and a mammal, Korean Water Deer were analyzed for five heavy metals such as iron, zinc, copper, lead and cadmium. The main purpose of this study was to make clear the background levels of the metal concentrations in the tissues of these game species. The metal levels were generally low and could be considered as the background levels. But some markedly high levels of lead were recorded in the muscles of birds shot by the shotgun. The implications of these results were discussed with respect to the health of people.

• Proceedings of the Materials Research Society of Korea Conference
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• 2011.10a
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• pp.42.1-42.1
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• 2011

박막형 디스플레이구서에 있어서 투명전극은 필수적이다. 투명전극은 정보를 표시하기 위해 빛을 외부로 방출시키거나 태양광 등을 소자 내부로 입사시켜야 한다. 또한 전극을 형성하는 박막은 높은 광투과율과 ${\sim}10-4{\Omega}cm$ 정도의 낮은 전기비저항을 가져야 한다. 가장 널리 사용되는 투명전극으로 ITO (Indium Tin Oxide)는 인듐의 독성, 저온증착의 어려움, 스퍼터링시 음이온 충격에 의한 막 손상으로 저항의 증가 및 액정디스플레이의 투명전극으로 사용될 경우 $400^{\circ}C$정도의 높은 온도와 수소플라즈마 분위기에서 장시간 노출시 열화로 인한 광학적 특성변화가 문제로 지적된다. 이러한 문제 해결의 대안으로 ZnO 산화물 반도체가 있는데 ITO 박막에 비해 비저항이 높기 때문에 도핑을 이용한 비저항을 ${\sim}10-4{\Omega}cm$ 정도로 낮추어야 한다. 투명전도막으로는 ITO, FTO 등과 더블어 체적 저항율은 다소 높으나 환원성 분위기에 대한 내성, 가시광 영역에서의 높은 광투과율과 저렴한 가격 등의 장점 등으로 AZO 박막이 주목 받고 있다. ZnO는 ITO 나 FTO에 비해서 700 kJ/mol의 큰 분해에너지를 가지므로 코팅 때 발생하는 전도도 및 투과율이 나빠지는 현상이 발생하지 않는 특징이 있으며, 위의 두 재료에 비해 밴드갭도 가장 낮아서 자외선 투과율이 낮다. 그러나 내습성이 약하기 때문에 이를 보완하기 위하여 내습성향상과 전도성 향상을 위해서 3족 원소인 B, In, Al, Ga 등을 도핑한 ZnO 투명전도막의 연구가 진행되고 있다. 이러한 원소들 중에서 Al로 도핑했을 때 가장 낮은 비저항을 얻을 수 있다고 알려져 있다. 본 연구에서는 SiOC 박막위에 AZO 박막을 제조하기 위하여 RF 마그네트론 스퍼터링법을 이용하여 박막을 성장시켰으며, 박막의 전기적 및 광학적 특성을 조사하였다. AZO 박막은 rf power가 5~200 W인 RF 마그네트론 스퍼터 방법에 의해서 제작되었다. SiOC 박막은 산소와 DMDMOS 전구체의 유량비를 다르게 하여 플라즈마 발생 화학적 기상 증착방법으로 증착되었다. 증착된 SiOC박막은 UV visible spectroscopy에 의해서 분석하였다. 투명전극의 비저항은 rf 전력이 작을 수록 낮았으며, SiOC 절연막 위에 AZO를 증착시킨 후 반사률은 반대로 바뀌는 것을 확인하였다.

• Journal of the Korea Organic Resources Recycling Association
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• v.14 no.3
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• pp.138-147
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• 2006

In this study, the composition and physico-chemical characteristics of municipal solid waste (MWS) which was treated in national park area kyungnam-do landfill were investigated. It is necessary to measure the characteristics of MSW and sludge to build a waste treatment facility, the data-base and total managing of the landfill. This MSW was composed of 34.62% of food wastes, 36.05% of papers, 15.37% of plastics & vinyls, 2.28% of textiles, 3.33% of wood, 0.49% of rubber & leathers and others, respectively. Most of MSW are composed of food, paper and plastic waste and more than 90% was combustible waste. For three components, moisture is 29.84%, combustible component is 62.30% and ash is 7.86%. The chemical element has the high order of carbon, oxygen, hydrogen on the dry basis of wastes. Also, the low heating value of the MSW which is measured by calorimeter is calculated as 2377.8kcal/kg. low heating value of the sludge is calculated as 338.06kcal/kg.

• Proceedings of the Korean Vacuum Society Conference
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• 1992.02a
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• pp.17-18
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• 1992

SIMS is an indispensable surface analysis instrument in trace element depth p profiling because of high detection sensitivity and excellent depth r resolution, however, it requires standard sample to do quantitative analysis d due to matrix effect depending on the species of impurities and sample m matricies and on the sputtering rates. A Among the SNMS technology developed to supply the deficiency, we researched i into CsX+ SNMS which improved the resul t quanti tati vely wi thout any extra epuipments. So basic SNMS functions were confirmed through matrix element composition rate a analysis using Si02 layer etc. and adaptability to trace element c concentration analysis was tried. For that purpose we compared SIMS depth profile data for Boron which presented s strong matrix effect on account of Fluorin existence after BF2 ion implantation on silicon substrate with SNMS data. d dynamic range were investigated. A After these experements we concluded that CsX+ SNMS reduced matrix effect and we could apply it to profile impurity elements.

• Journal of the Korean Vacuum Society
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• v.1 no.1
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• pp.115-120
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• 1992

SIMS is an indispensable surface analysis instrument in trace element depth profiling because of high detection sensitivity and excellent depth resolution, however, it requires a standard sample to do quantitative analysis due to matrix effect depending on the species of impurities and sample matricies and on the sputtering rates. Among the SNMS technology developed to supply the deficiency, we researched into CsX+ SNMS which improved the result quantitatively without any extra epuipments. So basic SNMS functions were confirmed through matrix element composition rate analysis using Siq layer etc., and adaptability to trace element concentration alaysis was tried. For that purpose we compared SIMS depth profile data for Boron which presented strong matrix effect on account of Fluorin existence after BF2 ion implantation on silicon substrate with SNMS data. Also detection limit and dynamic range were investigated. After these experements we concluded that CsX+ SNMS reduced matrix effect and we could apply it to profile impurity elements.

• Analytical Science and Technology
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• v.13 no.4
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• pp.440-445
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• 2000

The techniques for manipulation of various micro-tools were essential for particle isolation and chemical analysis of micro-size particles. This report described the detailed techniques for the preparation and handling of several micro-tools. Presence of uranium particles in smeared filter paper were identified by using the solid track detector. The uranium particles were isolated using the micro-tools under the stereomicroscope and then transferred to the filament of TIMS for the determination of isotope ratios.

• Korean Journal of Organic Agriculture
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• v.7 no.2
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• pp.163-167
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• 1999

To study the effects of chemical and organic fertilizer within the contents of essential elements in the lettuce, in the absence or presence of wood extraction, an experiment was conducted for a period of 10 weeks. The results obtained from the experiment are summarized as follows: 1. The iron contents in the lettuce grown in the chemical fertilized group, were different from those in the organic fertilized group, when the wood extraction was treated. The iron contents in the lettuce increased, due to the wood vinegar treatments, but the modes and degrees were not consistent the various kinds of lettuce. 2. Calcium contents in the lettuce were also increased by wood vinegar treatments, but the modes and degrees were not consistent with the various kinds of lettuce. On the other hand, the Calcium contents in the lettuce grown in the organic fertilized group were reduced by the wood vinegar treatments. 3. The mineral contents within other elements(Manganese, Copper, Zinc) in lettuce, is not variable according to the treatments, or the species of the lettuce.