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이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10
Solvent extraction experiments of Sm were performed from chloride solution with PC88A and saponified PC88A. Solvent extraction reaction of Sm with PC88A and the corresponding equilibrium constant were evaluated from the experimental and ionic equilibria data as follows Sm^(3+)_(aq)+ 1.5H₂A_(2,org)= SmA_(3,org)+ 3H^(+)_(aq) , K = 0.33. The predicted distribution coefficients of Sm agreed well with the experimental results. The distribution coefficients of Sm with saponified PC88A and the values of equilibrium pH depended on the initial extraction conditions. When the concentration of PC88A was in excess of that of Sm, saponification of PC88A greatly enhanced the extraction of Sm. (Received June 21, 2004)
염산용액에서 비누화 PC88A에 의한 용매추출로 Gd와 Sm의 분리
이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.5
Solvent extraction experiments have been performed to separate Gd and Sm from chloride solution with PC88A and saponified PC88A. The effects of extraction conditions on the distribution coefficients of Gd and Sm were investigated. The distribution coefficients of Gd were higher than those of Sm in the experimental ranges of experimental conditions of this study. A solvent extraction model was developed to predict the distribution coefficients of metals and separation factor between Gd and Sm from the initial extraction conditions. The measured distribution coefficients of Gd and Sm with PC88A and saponified PC88A showed good agreements with the predicted values. (Received March 3, 2005)
비누화 PC88A에 의한 NdCl₃와 SmCl₃용매추출의 화학모델
이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10
A chemical model was developed to estimate equilibrium constant for the solvent extraction of Nd and Sm from chloride solution with saponified PC88A. The model could be employed to predict the distribution coefficient of metal from the initial extraction conditions. The model consisted of chemical equilibria, mass balance, charge balance and solvent extraction reaction. By applying the model to the experimental conditions and data, equilibrium constants for the solvent extraction of Nd and Sm were obtained. The effect of the saponification of PC88A on the extraction of Nd was explained in terms of the equilibrium constant obtained in this study and the change of equilibrium pH. The predicted distribution coefficients of Nd and Sm agreed well with those measured. (Received July 14, 2004)
이만승,이광섭 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.8
Solvent extraction equilibria of FeCl_(3) from chloride solutions with TBP were analyzed by considering chemical reaction, mass balance, charge balance and extraction reaction. The activity coefficients of solutes in the aqueous phase were calculated by Bromley equation. Extraction reaction of FeCl_(3) with TBP in the experimental range of this study was determined from the dependence of the distribution coefficient of FeCl_(3) on the chloride ion concentration. By applying ionic equilibria to the results of solvent extraction, equilbrium constant of the extraction reaction was estimated to be 3.43×10^(2). The equilibrium concentrations of solutes in both phases after extraction could be calculated with the ionic equilibria developed in this study. The predicted concentrations of Fe in the aqueous phase after extraction agreed well with those experimentally measured.
Solvent Extraction of Gd from Chloride Solution with PC88A
Lee, Man-Seung,Lee, Gwang-Seop,Lee, Jin-Young,Kim, Sung-Don,Ahn, Jae-Woo,Kim, Joon-Soo The Japan Institute of Metals 2005 MATERIALS TRANSACTIONS Vol.46 No.2
<P>Solvent extraction experiments of Gd from chloride solution with PC88A were conducted at different extraction conditions. Solvent extraction reaction was identified from the experimental results using a graphical method, and the corresponding effective equilibrium constant was determined by analyzing the ionic equlibria in a GdCl<SUB>3</SUB> solution. In the experimental ranges investigated in this study, <I>i.e.</I>, [GdCl<SUB>3</SUB>]≤0.3 kmol/m<SUP>3</SUP>, [PC88A]<SUB>org</SUB>≤3.0 kmol/m<SUP>3</SUP> and initial pH≤2.3, solvent extraction reaction of Gd with PC88A and the corresponding effective equilibrium constant were obtained as follows Gd<SUP>3+</SUP>+2H<SUB>2</SUB>A<SUB>2,org</SUB>=GdA<SUB>3</SUB>HA<SUB>org</SUB>+3H<SUP>+</SUP>, <I>K</I><SUB>ex,eff</SUB>=2.8×10<SUP>−1</SUP>.</P>
Solvent Extraction of Sm from Chloride Solution with PC88A and Saponified PC88A
Lee, Man-Seung,Lee, Gwang-Seop,Lee, Jin-Young,Kim, Sung-Don,Kim, Joon-Soo The Japan Institute of Metals 2005 MATERIALS TRANSACTIONS Vol.46 No.1
<P>In this study, solvent extraction experiments of Sm from a chloride solution with PC88A and with partially saponified PC88A were performed. The extraction reaction of Sm with PC88A was identified from the experimental data using a graphical method. A chemical model was then developed to predict the distribution coefficients of Sm for its extraction with the saponified PC88A. In the experimental ranges conducted in this study, the equilibrium constants for the solvent extraction of Sm with PC88A and with the saponified PC88A were estimated through an analysis of the ionic equilibria.</P>
섬다래, 댕댕이나무 및 넌출월귤 종자의 기내발아에 미치는 GA3 처리 효과
이수광 ( Su Gwang Lee ),김효연 ( Hyo Yeon Kim ),구자정 ( Ja Jung Ku ),김현준 ( Hyeon Jun Kim ),정회석 ( Hea Seok Jeong ),신운섭 ( Un Seop Shin ),이기철 ( Ki Cheol Lee ),김현진 ( Hyun Jin Kim ),김성식 ( Sung Sik Kim ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 희귀식물 섬다래(Actinidia rufa (Siebold & Zucc.) Planch. ex Miq.), 댕댕이나무(Lonicera caerulea var. edulis Turcz. ex Herder) 및 넌출월귤(Vaccinium oxycoccus L.)의 기내발아에 미치는 GA3 처리 효과를 살펴보고자 수행되었다. WPM 기본배지로 하여 GA3 농도별로 대조구, 0.1, 0.5, 1.0 mg/L를 첨가하여 제조한 배지를 사용하여 기내발아 실험을 수행하였다. 그 결과 섬다래 종자는 GA3 첨가 농도가 높아질수록 뚜렷한 종자발아 효과를 나타내어 1.0 mg/L GA3 첨가구에서 92% 높은 발아율을 보였으나 대조구에서는 전혀 발아하지 않았다. 댕댕이나무의 기내발아는 6.6∼36.6%의 발아율을 나타내었으며, 1.0 mg/L GA3 첨가구에서 최고 발아율 36.6%로 나타났다. 넌출월귤은 1.0 mg/L GA3 첨가구에서 94%의 가장 높은 발아율을 보였고 대조구 0.1, 0.5 mg/L GA3 첨가구에서 각각 42%, 77% 및 92%의 발아율을 보였다. 이상의 결과를 통해 섬다래와 넌출월귤의 기내발아에는 각각 1.0과 0.5 mg/L GA3 첨가가 적절한 것으로 판단되며, 댕댕이나무는 최고 기내발아율이 36%로 나타나 발아율을 높이기 위한 추가연구가 필요한 것으로 생각된다. The effect of gibberellic acid concentration was studied on the in vitro seed germination of Actinidia rufa, Lonicera caerulea var. edulis, Vaccinium oxycoccus. The WPM basal medium supplemented with various concentrations of GA3 (0.1, 0.5, 1.0 mg/L) were used for in vitro seed germination. In 1.0 mg/L GA3, 92% seed germination of A. rufa. However, there was any seed germination in control. The range of germination of L. caerulea var. edulis was 6.6∼36.6%, optimal condition when 1.0 mg/L GA3 in WPM medium. And in vitro seed germination of V. oxycoccus increased to 42%, 77%, 92%, or 94% in control, 0.1, 0.5 or 1.0 mg/L GA3, respectively. Therefore, in vitro seed germination of A. rufa, L. caerulea var. edulis, V. oxycoccus were enhanced in GA3 supplemented in WPM medium.