• Korean Journal of Pharmacognosy
• /
• v.8 no.2
• /
• pp.61-68
• /
• 1977

The content of micro inorganic compounds in the 145 kinds of crude drugs on market was determined with Model 207 Atomic Absorption Spectrophotometer and Model 306 Flameless A.A. Content of Fe, Cu, Ni, Mn, Cd, Cr, Sn, and Pb was examined and the results revealed that the crude drugs which are using as a hematics and emmenagogues contained high content of iron, and those which are using as a antiinflammatory and emmenagogues contained high content of copper. Aromatic stomachics contain manganese and zinc, and diuretics and antiinaflammatory agents do tin. High content of Ni was found in tonics, but chronium and cadmium were not detected in crude drugs. There were no differences of content of trace metals in the various site of plants used.

• Journal of environmental and Sanitary engineering
• /
• v.15 no.4
• /
• pp.27-27
• /
• 2000

In order to treat the dyeing wastewater, the UV/TiO₂/H₂O₂ system was investigated, and proper pretreatment methods were examined to reduce the load on the system considering economical and technical efficiency. The results of this study were as follows: 1.UV/TiO₂/H₂O₂ system with pretreatment process was adopted, the result of Chemical coagulation and pH control units was pH 11→ coagulation → pH 4 and the optimum dosage of FeCl₃ was 600㎎/ℓ 2. Proper dosage of TiO₂in the UV/TiO₂/H₂O₂ system with pretreatment process was 2g/ℓ and H₂O₂ was 1000㎎/ℓ, UV contact time was 20min to get below 200㎎/ℓ of $COD_{Cr}$

• Journal of environmental and Sanitary engineering
• /
• v.15 no.4
• /
• pp.26-34
• /
• 2000

In order to treat the dyeing wastewater, the $UV/TiO_2/H_2O_2$ system was investigated, and proper pretreatment methods were examined to reduce the load on the system considering economical and technical efficiency. The results of this study were as follows: 1. $UV/TiO_2/H_2O_2$ system with pretreatment process was adopted, the result of Chemical coagulation and pH control units was $pH{\;}11{\;}{\rightarrow}{\;}coagulation{\;}{\rightarrow}{\;}pH{\;}4$ and the optimum dosage of $FeCl_3$ was $600mg/{\ell}$. 2. Proper dosage of $TiO_2$ in the $UV/TiO_2/H_2O_2$ system with pretreatment process was $2g/{\ell}$ and $H_2O_2$ was $1000mg/{\ell}$, UV contact time was 20min to get $200mg/{\ell}$ of $COD_{Cr}$.

• Journal of environmental and Sanitary engineering
• /
• v.12 no.1
• /
• pp.9-13
• /
• 1997

This study was carried out to quantify 11 trace minerals including Ca in wild duck egg, focused on health-aid-food, with Inductively Coupled Argon Plasma Atomic Emission Spectrometry(ICAPS). It showed the highest levels of P, Fe, Zn and Cu in egg yolk compared with those of another constituents in wild duck egg. In egg white, the trace mineral levels were demonstrated K 1096 ppm, Na 1666 ppm, respectively. Therefore the levels of K, Na are considerably high. The contents of Ca and Mg are conspicuously high in egg shell respectively. The essential minerals such as Co, Cr and Mn were trace in all constituent of wild duck egg, respectively.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
• /
• 2002.09a
• /
• pp.291-295
• /
• 2002

We measured the concentrations of heavy metals and VOCs in groundwaters (N=38) in Seoul. The comparison of our data with U.S. Environmental Protection Agency's Maximum Contaminant Levels for Drinking Water and with the Korean Drinking Water Standards shows that most of the metals except for Fe and Mn do not exceed the levels. However, the concentrations of most heavy metals (esp., Zn, Cu, Cr, Ni) tend to increase in residential and industrialized areas. The examination of the metal speciation using Anodic Stripping Voltammetry (ASV) and TOC analyzer Indicates that large amounts of Zn occur as labile metal fraction, whereas Cu occurs as non- labile forms at many sites, possibly due to its tendency to be adsorbed onto inorganic colloidal particles to form electroinactive species in groundwater. The most frequently existed VOCs in Seoul groundwaters are trichloroethylene and tetrachloroethylene, especially in agricultural, industrial, and high traffic areas.

• Journal of Food Hygiene and Safety
• /
• v.19 no.2
• /
• pp.55-59
• /
• 2004

This study was performed to investigate 172 samples of fried food in fast food store. The free fatty acid value of 22 samples exceeded standard of fried-food. These samples were 10 fried chickens, 6 fried potatoes and 5 fried onions. Fatty acid composition differed from each company. The correlation between free fatty acid value and double bond index was very low. New standard of fried food in fast food store is needed for thorough hygiene management, because of being not existed standard. The fried potato containing many carbohydrate and fat appeared higher calory than fried chicken containing many protein. The fried food had high fat comparatively, so that attention in regard to excess intake is demanded. The trace materials were included Mg, Ca, Mn, Fe, Zn, Cu and Cr in order of quantity, and the harmful heavy metals-Pb, Hg and Cd- were included small quantity.

• The Bulletin of The Korean Astronomical Society
• /
• v.35 no.2
• /
• pp.78.1-78.1
• /
• 2010

We obtained the spectra of 93 Planet host stars and 73 normal field stars in F, G, K type using BOES at BOAO. We measured the equivalent width of Fe and 13 elements lines using the automatic EW measurement program, TAME(Tools for Automatic Measurement of Equivalent-widths) and estimated the abundances by synth and abfind driver of MOOG code. Since the absence of planets in the normal field stars cannot be "completely" proved, this work focused on the chemical abundances and planet properties of planet host stars, which have the massive planets close to the parent star relatively. We carried out an investigation for the difference of abundances between stars with "Hot Jupiter" and normal field stars with no known planets. We examined the chemical composition of 12 elements, such as Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Co, and Ni by EW measurements, and the S abundances were estimated using synthetic spectrum.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2005.05a
• /
• pp.186-187
• /
• 2005

본 연구는 대구 ${\cdot}$ 울산을 대상으로 토양 내의 중금속 함량이 서로 다를 것으로 예상되는 주택지역, 도로와 인접한 주거지역, 공단지역으로 구분한 후 지역별 농도분포를 분석하고, 중금속 오염도의 실태를 파악하여 오염된 토양에 대한 효율적인 관리에 그 목적이 있다. 분석항목으로는 인체에 유해한 중금속인 As, Cr, Hg, Zn, Cd, Pb, Cu항목을 선정 하였으며, 기타 일반금속으로는 Fe, Si, Mg, Ca, Al, Na, K항목에 대해 분석하였다. 분석을 토양오염공정시험법에 따라 시행하였고 ICP로 측정하였다. 분석결과 대구 ${\cdot}$ 울산의 지역별 중금속 함량은 공단지역이 가장 높으며, 도로와 인접한 주거지역 및 주택지역 순으로 나타났다. 2003년 전국평균오염도와의 비교 분석 결과 대구의 경우 모든 지역이 전국평균오염도보다 낮게 검출되었으나, 울산의 경우 Cd, As, Zn의 함량이 1.619mg/kg, 75.05mg/kg, 238.707mg/kg으로 기준치보다 초과하여 검출되었다.

• Journal of Environmental Science International
• /
• v.12 no.3
• /
• pp.275-279
• /
• 2003

A water quality analysis of rainwater collected from catchment equipment(2m${\times}$1m) was conducted to determine its suitability for domestic purposes, in this study. As the results of analysis, the pH of rainwater was 6.3${\pm}$0.3, and the turbidity of rainwater was over the 5 times than drinking water guidelines. For the usage of rainwater as the domestic and drinking water, the rainwater is need to treat. The analysis value of BOD was about 3 mg/L and the values of heavy metal as the Pb, Cd, Fe, Mn, Cr$\sub$6/$\^$+/and Cu was satisfied with drinking guidelines. Overall results of analysis support the possibility of rainwater as the domestic and drinking water.

• Transactions of the Korean hydrogen and new energy society
• /
• v.4 no.2
• /
• pp.17-22
• /
• 1993

$ErCo_2$화합물에서 Co를 천이원소로 10%만큼 치환한 $Er(Co_{0.9}M_{0.1})_2$화합물(M=Cr, Mn, Fe, Ni, Cu)의 비정질화 온도를 측정해서 수소유기 비정질화에 영향을 미치는 인자에 대해 살펴보았다. 비정질화 온도는 치환원소의 원자반경과 비례함을 알 수 있었다 그러므로 $ErCo_2$ Laves 화합물에서 수소유기 비정질화에 영향을 미치는 인자는 확산과 밀접한 연관이 있는 원자의 크기임을 알 수 있다.