• 한국가금학회:학술대회논문집
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• 한국가금학회 2004년도 제21차 정기총회 및 학술발표회
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• pp.99-100
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• 2004

한국 재래닭의 각 계통별 세대간 계란의 장경, 단경 및 난형지수는 각각 53.0$\pm$0.6~55.6$\pm$0.8 mm, 39.1$\pm$0.8~40.9$\pm$0.2 mm 및 72.7$\pm$1.5~75.9$\pm$0.5이었고 회귀방정식에 의한 회귀계수로 표현된 능력변화 추세를 보면 적갈색, 황갈색, 회갈색, 흑색 및 백색 계통의 계란 장경은 각각 -0.01, 0.20, -0.02, -0.01 및 0.03 mm, 단경은 각각 0.10, 0.48, 0.52, 0.25 및 0.25 mm, 난형지수는 0.19, 0.62, 1.00, 0.32 및 0.33이었다.

• Journal of Microbiology
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• 제38권3호
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• pp.137-144
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• 2000

The genetic relationship of six Lactobacillus strains and five laboratory isolated form fermented milk were determined by a random amplified polymorphic DNA(RAPD)-Polymease chan reaction (PCR) method. With 42 random primers. the result were analyzed by using the NTSYS-PC software for phenetic analysis. it revealed that all tested bacteria were divided into three distinct clusters. The clusters implied three subgenuses existed for the genus Lactobacillus, which were previously proposed by Rogosa and Sharpe. From the results, it was also possible to determine that the isolated Lactobacillus strains from fermented milk were grouped into L. acidophilus or L. bulgaricus. Interestingly. the three tested L. casei strains were divided into different clusters implying different subgenuses, i.e., Thermobacterium (L. casei YIT 9018) and Streptobacterium(L. casei CHR. Hansen and L.casei ATCC 4646). According to the distance matrix generated by an UPGMA program, the isolated bacteria LT01 and LT02 were determined as a subspecies of L. bulgaricus. The HK01, HK02 and HK03 were very closely related to either L. acidophilus or L. case YIT 9018. Hence, RAPD-PCR appears to be a very practical method to determine the genetic relationships of the Lactobacillus species and to characterize the unknown Lactobacillus strains at the subspecies level.

• Environmental Engineering Research
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• 제23권2호
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• pp.223-227
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• 2018

This study reports a cyanide resistant and/or tolerant fungus, isolated from the rhizosphere of Zea mays contaminated with cyanide-based pesticides. The isolate was characterised using molecular biology. The effect of free cyanide and heavy metals on the growth of isolate in a synthetic gold mine wastewater was examined. The molecular analyses identified the isolate as Fusarium oxysporum EKT01/02 (KU985430/KU985431). The isolate had a free cyanide degradation efficiency of 77.6%. The results indicated greater growth impairment in culture containing Arsenic (optical density 1.28 and 1.458) and cyanide (optical density 1.315 and 1.385). Higher growth was observed in all cultures supplemented with extracellular polymeric substance. This study showed that the isolate possesses wide substrate utilisation mechanism that could be deployed in environmental engineering applications.

• 분석과학
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• 제12권1호
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• pp.22-27
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• 1999

Quinolone계 항균제의 일종인 pefloxacin을 넙치에 투여한 후, HPLC를 이용하여 약물의 분포도를 살펴보았다. 100 mg/kg의 pefloxacin을 넙치에 이틀 연속 경구투여한 후, 넙치의 혈액, 근육 및 간을 포함한 8개의 장기를 분석한 결과, pefloxacin은 장을 통하여 흡수되며 담낭에 축적됨을 알았다. 약물 투여 후 45분에 $4.70{\mu}g/ml$로 혈액내 농도가 최대치를 나타냈으며, 11일째에는 $0.31{\pm}0.01{\mu}g/ml$이 검출되었다. 근육조직에서는 10일째까지 $0.29{\pm}0.02{\mu}g/g$ tissue가 잔류하였다.

• 한국결정성장학회:학술대회논문집
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• 한국결정성장학회 1999년도 PROCEEDINGS OF 99 INTERNATIONAL CONFERENCE OF THE KACG AND 6TH KOREA·JAPAN EMG SYMPOSIUM (ELECTRONIC MATERIALS GROWTH SYMPOSIUM), HANYANG UNIVERSITY, SEOUL, 06월 09일 JUNE 1999
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• pp.389-402
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• 1999

Single crystal of Li2Cu1-xMxO4 (M=Ni, Zn) are promising as a substrate to realize superconducting electronic devices. The distribution coefficients of Ni and Zn to the Cu site in La2CuO4 (LCO) were estimated by the zone melting technique to grow high quality single crystals of La2Cu1-xMxO4(M=Ni, Zn). The distribution coefficient value of Ni was estimated to be 4.2 and that of Zn was estimated to be 0.66, respectively. Suitable solvent compositions were determined using these values to grow single crystals by he traveling floating zone (TSFZ) method. Single crystal of LCO, La2Cu1-xMxO4(M=Ni(x=0.01, 0.02, 0.03, 0.04), Zn(x=0.01, 0.02, 0.03) of high homogeneity were grown. The behaviors of the magnetization of these as-grown crystals do not indicate superconductivity except LCO. Ni or Zn substitution can make LCO non superconductor. This fact suggest that single crystals substituted by Ni or Zn are useful as substrate crystals.

• 한국포장학회지
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• 제25권3호
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• pp.131-137
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• 2019

Carton clamps, one of forklift attachments, allow users to quickly handle shipping units such as unitized loads, large shipping cases, or crates without the requirement of pallets. As the use of palletless handling by clamp trucks increases, so does the need for simulation research on clamp truck handling. The frictional characteristics for various contact conditions of corrugated paperboards and their constituent boards were analyzed to obtain the data needed in the computer simulation for the handling of carton clamp truck. The overall mean of static-frictional coefficients between selected corrugated paperboards was 0.38 (±0.01), which was 1.3~1.6 times greater than 0.23~0.29 of the frictional coefficients between boards. The overall mean of static-frictional coefficients between the corrugated paperboards and the rubber contact pad was 0.82 (±0.02), which was about 1.1 to 2.8 times greater than 0.29~0.78 of the static-frictional coefficient between the linerboard and the rubber contact pad. The overall mean of kinetic-frictional coefficients between the corrugated paperboards was 0.35 (±0.01), and 0.76 (±0.02) between the corrugated paperboards and the rubber contact pad.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.182-182
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• 2014

Multiferroic materials have attracted much attention due to their own fascinating fundamental physical properties and potential technological applications to magnetic/ferroelectric data storage systems, quantum electromagnets, spintronics, and sensor devices. Among single-phase multiferroic materials, $BiFeO_3$, in particular, has received considerable attention because the enhanced ferromagnetism was found by the Fe-site ion substitution with magnetic ions. The structural, the magnetic and the ferroelectric properties of polycrystalline $BiFe_{1-x}Ni_xO_3$ (x=0, 0.01, 0.02, 0.03 and 0.05), which were prepared by the solid-state reaction and the rapid-sintering method, have been investigated. The x-ray diffraction patterns reveal that all the samples are in single phase and show rhombohedral structure with R3c space group. The magnetic properties are enhanced according to the doping content. The Ni-doped $BiFeO_3$ samples exhibit lossy P-E loop due to the oxygen vacancy. The leakage current density of Ni-doped samples (x=0.01 and 0.02) is increased by four orders of magnitude. On the other hand, the x=0.03 and 0.05 samples show the relative reduction of the leakage current.

• 분석과학
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• 제23권3호
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• pp.261-268
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• 2010

본 연구에서는 최근 제안된 PCBs 함유 고상폐기물 공정시험방법을 토대로 PCBs 함유 변압기에서 90건의 시료를 채취 분석하였으며, 제시한 분석방법의 폐기물 시료에 적정성 여부를 검토하였다. 채취한 변압기 절연유에서의 PCBs 농도범위는 7.6~23.8 mg/L로 나타났으며, 규소강판은 $0.02\sim0.54\;{\mu}g/100cm^2$의 농도범위로 검출되었다. 또한, 구리선 등의 비정형 폐기물은 0.01~0.071 mg/kg의 농도범위로 검출 되었다. 본 연구 결과, 폐기물공정시험방법의 새로운 분석방법과 규제기준은 기존의 용출시험방법으로 고상폐기물을 관리하는 경우에 비해 PCBs 함유 폐기물의 관리가 보다 강화된 것으로 판단된다.

• Journal of Magnetics
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• 제12권4호
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• pp.144-148
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• 2007

We report on the observation of p-type conductivity and ferromagnetism in diluted magnetic semiconductor $(Zn_{0.97}Mg_{0.01}Mn_{0.02})O:P$ films grown on $SiO_2/Si$ substrates by pulsed laser deposition. The p-type conduction with hole concentration over $10^{18}cm^{-3}$ is obtained by codoping of Mg and P followed by rapid thermal annealing in an $O_2$ atmosphere. Structural and compositional analyses for the p-type $(Zn_{0.97}Mg_{0.01}Mn_{0.02})O:P$ films annealed at $800^{\circ}C$ indicates that highly c-axis oriented homogeneous films were grown without any detectable formation of secondary phases. The films were found to be transparent in the visible range. The magnetic measurements clearly revealed an enhancement of room temperature ferromagnetism by p-type doping.

• 플랜트 저널
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• 제12권1호
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• pp.37-43
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• 2016

플랜트 하부 강파일 기초 주변 토양의 부식성을 평가하기 위해서 현장조사, 현장 보링작업을 통한 시료 채취 및 실험실 분석을 거친 결과를 검토하였다. 토양 분석 결과 강관파일이 타설된 토양은 여러 개의 특성이 다른 토양층으로 구성되어 있었으며, 각 지층의 화학적, 물리적 성질이 다르므로 강관파일의 타설깊이에 따른 부식성의 차이가 발생할 것을 예상할 수 있었다. 분석 결과를 토대로 정성적인 부식성 평가, 평균부식속도 및 최대부식속도를 예측한 결과, 일부 지층에서는 일반적으로 강관파일 설계시 적용되는 부식속도인 0.01-0.02mm/y 이상의 평균부식속도를 보이고 있었다 (0.33mm/y).