• 한국균학회지
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• 제21권4호
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• pp.273-278
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• 1993

한국에서 야생(野生)하는 6종 식용(食用)버석에 함유된 미량 금속원소의 함량순서는 다음과 같다. 뽕나무버섯은 K가 778.2 ppm으로 가장 많았고 그 다음이 Fe, Na, Zn, Mn, Cu 순이고 Ca은 검출되지 않았으며 뽕나무버섯부치는 K가 (972.9 ppm), Zn, Mn, Fe, Na, CU, Ca 순으로 K함량이 가장 많았다. 자주방망이버섯은 K(699.8 ppin), Zn, Fe, Na, Cu, Mn 순으로 K가 가장 많이 함유되어 있었고 Ca은 검출되지 않았으며 자주방망이버섯아재비는 K(945.2 ppm), Zn, Fe, Na, Cu, Mn, Ca 순으로 K이 가장많이 검출되었다. 벚꽃버섯은 K(878.6 ppm), Zn, Fe, Na, Cu, Ca, Mn 순으로 K가 최고치였고 붉은산무명버섯은 Zn(6637.3 ppm), Fe, K, Na, Ca 순으로 Zn이 특히 가장 많았고 Cu는 검출되지 않았다. 실험분석한 전(全)미량금속원소(Cd는 제외)가 가장 많이 함유된 버섯은 붉은산무명버섯이었고 그 다음이 자주방망이버섯아재비, 벚꽃버섯, 자주방망이버섯, 뽕나무버섯, 뽕나무버섯부치의 순이었다. 6종의 버섯중 가장 많이 함유된 미량금속원소는 Zn이었고 그 다음이 K, Fe, Na, Mn, Cu, Ca 순이었다. Cd는 채집장소인 서울산업대, 광릉, 동구릉, 설악산 순으로 설악산에서 채집한 벚꽃버섯, 붉은산무명버섯에 가장 적은 분석치(흔적량)을 얻었다.

• 한국광물학회지
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• 제6권2호
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• pp.80-93
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• 1993

Jido kaolin deposits developed in the rhyolitic tuff of Cretaceous are located in the western part of Sinan-gun, Jeonranam-do. Jido kaolin deposits is predominantly composed of pyrophyllite, kaolinite and illite. On the basis of mineral assemblage Jido kaolin deposits can be divided into three alteraion zone from the center of alteration to the margin; kaolinite, kaolinite-pyrophyillite and pyrophyillite zones. Discriminant analysis show that $Al_2O_3$, $K_2O$, $Na_2O$, CaO of major elements are discriminant elements classifying kaolinite, kaolinite-pyrophyllite and pyrophyllite zones, while in case of trace elements Cr, Ni, Sc, Zn, and Zr are discriminant elements. Kaolin deposits has been formed by the hydrothermal alterations of the volcano rocks such as rhyolitic tuff and lapilli tuff, in late cretaceous. On the basis of the results of X-ray diffraction analysis, the deposits can be classified into three types of minerals assemblages; kaolinite, kaolinite-pyrophyllite and pyrophyllite zones. All the assemblages contain quartz and muscovite, but the kaolinite zone contains kaolinite, illite and chlorite, the kaolinite-pyrophyllite zone contains kaolinite, pyrophyllite and the pyrophyllite zone contains illite and pyrite.

• 환경영향평가
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• 제15권6호
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• pp.425-433
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• 2006

Instrumental neutron activation analysis was used to measure the concentrations of 27 elements associated with respirable particulate matter (PM10) that were collected from the Third and Fourth Industrial Complex Area of Daejeon City. The distribution patterns of elements were clearly distinguished with their concentrations varying across more than four orders of magnitude. The mean for Al were recorded to be the highest value of 1,527 $ng/m^3$, while that for In showed the lowest value of 0.1 $ng/m^3$. If compared in terms of enrichment factors, it was found that certain elements (e.g., As, Br, Cl, Cr, I, In, Sb, Se, and Zn) are enriched in PM10 samples of the study site. The results of factor analysis indicated six factors with statistical significance, which may exert dominant controls on regulating the elemental concentration levels in the study area.

• 자원환경지질
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• 제33권3호
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• pp.205-215
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• 2000

The Anyang River runs through highly industrialized area and joins the lower part of the Han River. loading out large amounts of potential pollutants. Attempts were made to understand geochemical behavior of trace elements in the stream sedimens collected from the bottom of the river and the stream water. Bottom sediments, suspended solids and stream waters were collected and analysed for the chemical and mineralogical composition. Heavy metals including Cr, Zn, Ni, and Co in the sediments were enriched appeared to reflect anthropogenic input. Pb, Cu, As were also enriched between several to 10 times , compared to background levels. Although some heavy metals were derived from anthropogeic input, geochemical associations seem to implyh much of the elements are originated from natural sources as well, mainly from granitic rocks . This is also supported by the mineralogical composition of the suspended solids, which are mainly composed of quartz, feldspar and mica. Most of the elements are associated with total carbon and clay sized fractions, with high values of correlation coefficient. Most of the elements are associated with total carbon and clay sized fractions , with high values of correlation coefficient. It was noteworthy that Hg was detected between 2 and 4 ppb in the stream water.

• 자원환경지질
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• 제27권6호
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• pp.549-556
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• 1994

Geochemical studies on gold-bearing quartz veins and wallrocks from the Okgye mine were carried out in order to investigate the primary dispersion patterns of gold and associated elements and to quantify the dispersion width of elements with distance from the gold-bearing quartz veins. Gold-bearing quartz veins occur in basaltic trachyandesite of unknown age. Enrichment of $k_2O$, MnO, Au, As, Rb, Sb, Pb, Zn, Cu, Ag and Cd, and depletion of $Na_2O$ and Sr are found in altered wallrocks. The ratio of $k_2O(k_2O+Na_2O)$, alteration index for trace elements, and Rb/Sr in altered wallrocks are increased, whereas Sr/CaO ratio is decreased with approach to the gold-bearing quartz veins. The widths of primary dispersion range from 17 cm to 155 cm. The relative dispersion width increases in order Au=Cu=Zn=Ag=Cd$k_2O$=Rb and Ba< $Na_2O$ $Na_2O$, As, Sb, Sr, Pb, Au, Cu, Zn, Ag and Cd, and a quadratic function for $k_2O$, MnO, Rb and Ba.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제11권1호
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• pp.73-88
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• 2004

A punctured torus $\Sigma(1,1)$ is a building block of oriented surfaces. The goal of this paper is to formulate the matrix presentations of elements of the Teichmuller space of a punctured torus. Let $\cal{C}$ be a matrix presentation of the boundary component of $\Sigma(1,1)$.In the level of the matrix group $\mathbb{SL}$($\mathbb2,R$) we shall show that the trace of $\cal{C}$ is always negative.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2008년도 춘계학술대회 논문집
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• pp.361-362
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• 2008

• Bulletin of the Korean Chemical Society
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• 제32권6호
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• pp.2105-2108
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• 2011

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2008년도 추계학술대회 논문집
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• pp.290-291
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• 2008

• 대한수학회보
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• 제51권6호
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• pp.1655-1668
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• 2014

In this article, we propose and analyze a new nonconforming primal mixed finite element method for the stationary Stokes equations. The approximation is based on the pseudostress-velocity formulation. The incompressibility condition is used to eliminate the pressure variable in terms of trace-free pseudostress. The pressure is then computed from a simple post-processing technique. Unique solvability and optimal convergence are proved. Numerical examples are given to illustrate the performance of the method.