• Bulletin of the Korean Chemical Society
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• 제22권11호
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• pp.1177-1178
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• 2001

• Bulletin of the Korean Chemical Society
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• 제22권3호
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• pp.311-314
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• 2001

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 1998년도 한국우주과학회보 제7권1호
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• pp.22.1-22
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• 1998

No Abstract.See Full-text

• Journal of Advanced Marine Engineering and Technology
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• 제18권4호
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• pp.53-61
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• 1994

An experimental study on heat pump cycle systematizing characteristics for non-azeotropic refrigerant mixtures of R-22+R-114 was reported. Data were obtained under steady state condition at the ranges of parameters, 550- 2, 170kcal/h, 670-2, 990kcal/h, 24-71kg/h, and 0-1, for as cooling capacity, heating capacity, mass 25, 50, 75, and 100 per cent of R-22 by weight fraction for R-22+R-114 mixtures. The results shown that the C.O.P of the 50wt% of R-22 mixture was considerably larger than for pure R-22 and other weight fraction of R-22 mixtures, but the compression power of the 25wt% of R-22 was lower than that of the pure R-22 and the other weight fraction of R-22 mixtures. The hightest value of cooling capacity was obtained at the conditions of evaporating temperature 5.deg.C and R-22 50wt% mixture. In general, with an increase in the R-22 weight fraction for fixed values of the other parameter, the cooling capacity increased at first, obtained a maximum, and then decreasd. This verified the importance of accurate weight fractions od refrigerant mixtures in the heat pump cycle.

• 한국수정란이식학회지
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• 제27권3호
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• pp.163-169
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• 2012

The 3-isobutyl-1-methylxanthine (IBMX) is non-selective phosphodiesterase and is able to prevent resumption of meiosis by maintaining elevated cyclic AMP (cAMP) concentrations in the oocyte. The present study was conducted to analyze: (1) nuclear maturation (examined by the Hoechst staining), (2) whether cytoplasmic maturation (examined by the intracellular glutathione (GSH) concentration) of porcine oocytes is improved during meiotic arrest after prematuration (22 h) with IBMX. Before in vitro maturation (IVM), oocytes were treated with 1 mM IBMX for 22 h. After 22 h of pre-maturation, the higher rate of IBMX treated group oocytes were arrested at the germinal vesicle (GV) stage (42.3%) than control IVM oocytes (10.1%). It appears that the effect of IBMX on the resumption of meiosis has shown clearly. In the end of IVM, the reversibility of the IBMX effect on the nuclear maturation has been corroborated in this study by the high proportions of MII stage oocytes (72.5%) reached after 44 h of IVM following the 22 h of inhibition. However, intracellular GSH concentrations were lower in the oocytes treated with IBMX than the control oocytes (6.78 and 12.94 pmol/oocyte, respectively). These results demonstrate that cytoplasmic maturation in porcine oocytes pre-treated with IBMX for 22 h did not equal that of control oocytes in the current IVM system. These results indicate that pre-maturation with IBMX for 22 h may not be beneficial in porcine IVM system.

• 한국전기전자재료학회논문지
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• 제20권6호
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• pp.487-490
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• 2007

In this paper, the formation and thermal stability characteristics of Ni silicide using Ni-V alloy on Boron cluster ($B_{18}H_{22}$) implanted bulk and SOI substrate were examined in comparison with pure Ni for nano-scale CMOSFET. The Ni silicide using Ni-V alloy on $B_{18}H_{22}$ implanted SOI substrate after high temperature post-silicidation annealing showed the lower sheet resistance, no agglomeration interface image and lower surface roughness than that using pure Ni. The thermal stability of Ni silicide was improved by using Ni-V alloy on $B_{18}H_{22}$ implanted SOI substrate.

• 한국축산시설환경학회지
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• 제10권2호
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• pp.119-126
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• 2004

파인애플과 키위의 과피 추출물의 단백질분석과 이를 이용한 혈분, 파란분말 그리고 글루텐 분말의 가수분해 최적 조건을 조사하였다. 전기영동에 의하여 단백질을 분석한 결과 파인애플 과피 추출물에서는 분자량 22 kd의 단백질이 나타났으며 키위의 과피 추출물에서는 분자량 27 kd, 22.5 kd, 22 kd, 19kd 그리고 14.4 kd인 단백질 6종이 나타났다. 파인애플 과피 추출물에서 나타난 22 kd 단백질은 단백질 분해효소인 bromelain인 것으로 추정되며, 키위 과피 추출물에서 나타난 27 kd 단백질은 단백질 분해효소인 actinidin인 것으로 추정된다. 파인애플과 키위의 과피 추출물을 이용한 혈분, 파란 분말 그리고 글루텐 분말의 가수분해 최적 시간, 온도 및 pH는 각각 6에서 24시간, $60^{\circ}C$ 그리고 pH 4 에서 7의 범위인 것으로 나타났다.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제22권2호
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• pp.145-158
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• 2015

In this paper, we investigate h-stability and boundedness for solutions of the functional perturbed differential systems using the notion of t_∞-similarity.

• Bulletin of the Korean Chemical Society
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• 제22권7호
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• pp.782-784
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• 2001

• Bulletin of the Korean Chemical Society
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• 제22권8호
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• pp.791-792
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• 2001