• Journal of Nutrition and Health
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• 제30권9호
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• pp.1045-1049
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• 1997

In order to study the content of selected elements in the organs of the mice, mice were fed with green juice of Angelica keiskei Koidz for 16 weeks. The results obtained from the experiments are summarized as follows : 1) The element contents(cr, Mn, Ni, Cu, Zn, Cd, Ba, Pb, and Fe) in the whole plant are generally the same as those the previous reports. 2) The element contents(Cr , Mn, Ni, Cu, Zn, Cd, Ba, Pb and Fe) in the green juice did not exceed those of the edible water standard. 3) The element contents (Cr, Mn, Ni, Cu, Zn, Cd, Ba, Pb and Fe) in the brain is slightly higher than those in the whole plants. 4) The element contents(Cr, Ni, Pb and Fe) in the organs of the mice fed green juice for 16 weeks are the same as those of the previous reports.

• Journal of Magnetics
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• 제19권2호
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• pp.101-105
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• 2014

In this work, Zinc ferrite nanoparticles have been prepared by various methods, conventional (ZC), mechanochemical processing (ZM) and Sol-Gel (ZS) method, to compare their structural and magnetic properties. The cation distribution obtained from XRD shows the degrees of inversions are 4%, 14.8%, and 16.4% from the normal $ZnFe_2O_4$ structure. Fourier transform infrared spectroscopy (FT-IR) confirms changes in cation distribution of $ZnFe_2O_4$ fabricated by sol-gel and mechanochemical processing. The $^{57}Fe$ M$\ddot{o}$ssbauer spectra of the samples were recorded at room temperature. The spectra exhibit a line broadening. The magnetic properties of the samples were studied by vibration sample magnetometer (VSM) at room temperature and the results show that the sample ZM has ferrimagnetic behaviour.

• 한국세라믹학회지
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• 제29권10호
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• pp.765-772
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• 1992

As the fundamental research of preparation of fine single crystalline ferroxplana by means of glass-crystallization methods using steel twin-roller the properties of ferroxplana extracted from cyrstallized glass were studied. Most of all the specimens quenched by twin-roller at about 1350$^{\circ}C$ were glass phase, the crystallization of these glass had multi-steps and ferroxplana phase was only stable untill 900$^{\circ}C$, began to be decomposed from about 950$^{\circ}C$ in glass. The morphology of particle could be controlled by the composition and crystallization condition, and Zn2+ was replaced by reduced Fe2+ which is 2∼3% contents of total Fe. Ferroxplana extracted had such magnetic properties as Ms=34 emu/g, mHc=10 Oe and Curie Temperature, Tc=425K.

• 한국세라믹학회지
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• 제39권12호
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• pp.1119-1123
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• 2002

Nanostructured spinel NiZn ferrites were prepared by the sol-gel method from metal nitrate raw materials. Analyses by X-ray diffraction and scanning electron microscopy showed the average particle size of NiZn ferrite was under 50 nm. The single phase of NiZn ferrites was obtained by firing at 250${\circ}C$, resulting in nanoparticles exhibiting normal ferrimagnetic behavior. The nanostructured $Ni_{1-X}Zn_XFe_2O_4$ (x=0.0∼1.0) were found to have the cubic spinel structure of which the lattice constants ${\alpha}_2$ increases linearly from 8.339 to 8.427 ${\AA}$ with increasing Zn content x, following Vegard's law, approximately. The saturation magnetization $M_s$ was 48 emu/g for x=0.4 and decreased to 8.0 emu/g for higher Zn contents suggesting the typical ferrimagnetism in mixed spinel ferrites. Pure NiZn ferrite phase substituted by Cu was observed before using the additive but hematite phase was partially appeared at $Ni_{0.2}Zn_{0.2}Cu_{0.6}Fe_2O_4$. On the other hand, the hematite phase in this NiZn Cu ferrite was disappeared after using the additive of acethyl aceton with small amount. The saturation magnetization Ms of $Ni_{0.2}Zn_{0.8-y}Cu_yFe_2O_4$(y=0.2∼0.6) as measured was about 51 emu/g at 77K and 19 emu/g at room temperature, respectively.

• 한국식품위생안전성학회지
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• 제27권2호
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• pp.133-140
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• 2012

본 연구는 중금속이 함유된 식이를 섭취 시 생체 내에서의 중금속 동태 및 함량을 구명하고자 Cd 오염 지역에서 생산된 현미를 첨가한 식이로 12주간 흰쥐를 사육하여 성장 특성과 혈액, 간 및 신장 조직의 Cd, Zn 및 Cu의 함량을 분석한 결과는 다음과 같다. 식이에 따른 일일 증가체중은 BR 및 PBR 100% 식이 군에서 0.22-0.26 g/day이었고, FE식이 군은 1.08-1.26 g/day로 식이 원에 따른 체중변화 차이가 뚜렷하였다. 식이 내 중금속 일일 섭취량은 BR+PBR 50% 및 PBR 100% 군은 10.77 및 22.36 ${\mu}g/rat$ 이고, FE+PBR 50% 군은 8.83 ${\mu}g/rat$로 식이 중 Cd 농도에 따라 일일 Cd 섭취량이 증가 되었다. 12주간 섭취한 중금속은 전체적으로 식이 중 Cd 함량이 높아지면 이들 총 섭취량도 증가되었다. BR+PBR 50% 군 및 FE+PBR 50% 군의 간과 신장의 무게는 FE 식이 군에서 2.64배 및 2.27배 높은 무게를 나타냈다. 혈액 중 Cd 함량은 BR 식이 섭취량이 많을수록 증가되었고, Zn 및 Cu 함량은 감소되었다. 동일 Cd 농도 식이 군에서 FE+PBR 50% 군은 BR+PBR 50%로 조제한 식이군보다 혈액 중 Cd 함량이 1.27배 높았다. 간에서 BR, BR+PBR 50% 및 PBR 100% 식이 군은 Cd 농도가 높으면 간 중 Cd 함량이 증가되는 현상이 뚜렷하였다. 동일 수준 농도에서 BR+PBR 50% 및 FE+PBR 50%의 Cd 축적은 BR 식이가 높았다. 신장 중 BR, BR+PBR 50% 및 PBR 100% 식이 군에서 Cd 함량의 축적이 높아지면 신장 중 Zn 및 Cu 함량이 증가하였고, 식이군의 Cd 농도가 같은 수준에서 FE와 BR 첨가 차이는 BR 첨가식이 군이 FE로 조제한 식이군보다 3.11배가 높은 Cd 함량을 나타냈다. 이와 같은 결과는 오염된 식이의 섭취량과 Cd 농도 수준에 의존한 결과로서 Zn 및 Cu 함량과도 깊은 관계가 있음을 확인하였다.

• 한국세라믹학회지
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• 제44권6호
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• pp.297-302
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• 2007

With aids of square wave voltammetry (SWV) the redox behavior for various combination of polyvalent ions (Sb+Fe, Sb+Zn, Sb+Ce+Ti+Zn) was investigated in alkali-alkaline earth-silica CRT (Cathode Ray Tube) glass melts. The current-potential curve so called voltammogram was produced at temperature range of 1400 to $1000^{\circ}C$ under the scanned potential between 0 and -800 mV at 100 Hz. In the case of the Sb+Fe and Sb+Zn doped melts, peak for $Sb^{3+}/Sb^0$ shown voltammogram was shifted to negative direction comparing to the only Sb doped melts. However, according to voltammogram of Sb+Ce+Ti+Zn doped melt, Ti and Ce except Zn had hardly any influence on the redox reaction of Sb. Based on the temperature dependence of the peak potential, standard enthalpy (${\Delta}H^0$) and standard entropy (${\Delta}S^0$) for the reduction of $Fe^{3+}$ to $Fe^{2+}$, $Sb^{3+}$ to $Sb^0$, $Zn^{2+}$ to $Zn^0$ and $Ti^{2+}$ to $Ti^0$ in each polyvalent ion combination of CRT glass melts were calculated.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2004년도 동계학술연구발표회 논문개요집
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• pp.105-106
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• 2004

• 한국재료학회:학술대회논문집
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• 한국재료학회 2007년도 추계학술발표대회 및
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• pp.128.1-128.1
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• 2007

• 한국재료학회:학술대회논문집
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• 한국재료학회 1993년도 추계 학술발표 강연 및 논문 개요집
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• pp.23-32
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• 1993

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2004년도 하계학술연구발표회 논문개요집
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• pp.78-79
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• 2004