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Cellulose 계 혼화제와 고성능 감수제를 이용한 수중콘크리트의 경화특성
신동길,남궁연,김홍철,김현중,이철태 한국공업화학회 1998 응용화학 Vol.2 No.2
Characteristics of underwater concrete with non-segregation agent and superplastizer were measured. From the result it was found that the proper amount of added superplastizer and non-segregation for 300k/㎠ of compressive strength and 80% of compressive strength ratio were 0.8wt% of cement weight respectively. Compressive strength showed inversely when the amount of them increased.
선방패독탕(仙方敗毒湯)이 아토피 피부염 환자 단핵세포의 Cytokine 분비능에 미치는 영향
신동길,김우연,이진용,김덕곤,Shin, Dong-Gil,Kim, Woo-Yeon,Lee, Jin-Yong,Kim, Deog-Kon 대한한방소아과학회 2002 대한한방소아과학회지 Vol.16 No.1
Effect of Sunbangpaedoktang, which has been used for atopic dermatitis(AD), on the cytokine secretory function of monocyte, which was isolated and cultured from peripheral blood of AD patients, were evaluated. The results were as follows: 1. In AD patients, Sunbangpaedoktang exhibits statistically significant inhibitory effect on IL-4. 2. In AD patients, Sunbangpaedoktang exhibits statistically significant inhibitory effect on IL-5(p<0.05). 3. In AD patients, Sunbangpaedoktang exhibits statistically significant inhibitory effect on $IFN-{\gamma}$(p<0.01). 4. In sample group, comparing the cytokine concentration change rate of AD patients with that of NAD patients IL-4 AD patients exhibits statistically significant decrease(p<0.05).
Thermoelectric Properties of Partially Double-filled (Pr1−zYbz)yFe4−xCoxSb12 Skutterudites
신동길,김일호 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.6
(Pr1−zYbz)yFe4−xCoxSb12 (z = 0.25, 0.75, y = 0.8, and x = 0, 0.5, 1.0) skutterudites were prepared by using encapsulated melting, annealing, and hot pressing, and the effects of Pr/Yb partial double filling and Co charge compensation on the microstructure, charge transport and thermoelectric properties were investigated. All specimens were transformed to the skutterudite phase by using melting and annealing processes, and a few secondary phases such as marcasite FeSb2 formed together with the skutterudite phase. However, with Co substitution, the intensities of the FeSb2 peaks decreased, and proportion of the FeSb2 phase decreased with increasing Co content. Pr and Yb were confirmed to be partially double filled in the voids, and Co was substituted at Fe sites because for the Pr/Yb and Fe/Co substitution, the lattice constant changed with the filling ratio. All specimens exhibited degenerate semiconductor characteristics and p-type conduction at temperatures from 323 K to 823 K, and the charge transport properties showed a slight difference with changing filling fraction due to the difference in the valences of Pr and Yb. With increasing Pr and Co contents, the carrier concentration decreased. Consequently, the Seebeck coefficient increased, and the electrical conductivity decreased. The electronic thermal conductivity dominated the thermal conductivity, and the lattice thermal conductivity was decreased because the phonon scattering was enhanced by the Pr and Yb partial double-filling. Although the lattice thermal conductivity of partially double-filled specimens was lower than that of completely double-filled specimens, the partially double-filled specimens showed higher thermal conductivity because of the increase in electronic thermal conductivity caused by the high carrier concentration. The maximum dimensionless figure of merit, ZT = 0.85, was obtained at 723 K for (Pr0.75Yb0.25)0.8Fe3CoSb12.