Amidoxime 에 의한 금속 추출 평형 및 추출 속도

신정호,민성기,정갑섭,김주석 ( Jeong Ho Shin,Seong Kee Min,Kap Seop Jeong,Joo Seok Kim ) 한국공업화학회 1994 공업화학 Vol.5 No.1

금속의 용매 추출에 amidoxime의 추출제로서의 특성을 검토하기 위하여 benzamidoxime 및 phenyla-cetamidoxime에 의한 금속 추출평형 및 추출속도에 관한 실험 및 이론적 고찰을 하였다. Cu, Pb, Zn 및 Cd등 단독 금속 계와 혼합 금속계에 대한 amidoxime-클로로포름에 의한 추출에서 추출비와 수소이온 농도 및 추출제 농도간의 상관관계로부터 추출기구와 추출성을 검토하고, 수상측 경막 내 확산 방정식으로부터 도출된 이론적 속도식과 실험적 속도식을 비교함으로써 초기 추출 속도식은 R_o=k(C)-_(HRD)(C_(MO)/C(HO))^(1/2)로 표시할 수 있었으며, 추출과정의 율속 단계를 고찰하였다. amidoxime에 의한 Cu의 추출 화학종은 (CuR)-_2의 형이었다. The kinetics and equilibrium of metal extraction by benzamidoxime and phenylacetamidoxime-chloroform were investigated to apply amidoxime to metal extraction as chelating agent. The overall extraction constant, extraction mechanism and selective extraction of copper were examined from the relation among extraction ratio, hydrogen ion concentration and extractant concentration. The experimental rate equation of copper extraction coincided with the theoretical rate equation and was expressed as R_o=k(C)-_(HRo)(C_(Mo)/C^(Ho))^(1/2). The chemical species extracted was found to the type of (CuR)-_2.

Salicyladoxime 에 의한 금속 추출에 관한 연구

신정호,박상욱,박대원,이경수,정갑섭 ( Jeong Ho Shin,Sang Wook Park,Dae Won Park,Kyung Soo Lee,Kap Seop Jeong ) 한국공업화학회 1993 공업화학 Vol.4 No.1

salicylaldoxime에 의한 Cu의 용매추출에 있어서 추출평형 및 추출속도 등을 고찰하였다. 흡광도 측정으로부터 oxime의 분배정수와 해리정수를 구하고, oxime-Cu착화합물의 안정도 상수와 분배정수, 분자흡광계수 및 추출평형정수를 결정하였다. chloroform 및 benzene 용매하에 salicylaldoxime에 의한 Cu의 추출 화학종은 1:2의 형태인 CuR_2였으며, 초기 추출속도실험으로부터 salicylaldoxime-chloroform에 의한 Cu의 총괄추출속도는 R=k[Cu^(2+)][HR]^(0.5)/[H^+]^(0.4)로 표시되었다. The kinetic and equilibrium characteristics of copper extraction by salicylaldoxime in chloroform and benzene were investigated. Equilibrium constants such as dissociation constant, distribution coefficient of salicylaldoxime and stability constant, distribution coefficient and molar extinction coefficient of oxime-Cu chelate were determined from absorbance. Extracted species of Cu-chelate were found to be CuR_2. Overall initial extraction rate of copper by salicylaldoxime in chloroform was expressed by the following equation : R=k[Cu^(2+)][HR]^(0.5)/[H^+]^(0.4).

β-ketohexanal에 의한 Cu(II)의 추출 특성

신정호,이상훈,정갑섭,박경기,전상우,Shin, Jeong-Ho,Lee, Sang-Hoon,Jeong, Kap-Seop,Park, Kyung-Kee,Jun, Sang-Woo 한국공업화학회 1996 공업화학 Vol.7 No.6

Sodium amide에 의한 methyl propyl ketone과 ethyl formate의 반응으로 킬레이트 추출제의 하나인 $\beta$-ketohexanal(이하 KHA)를 합성하고, KHA-클로로포름에 의한 구리의 추출평형 실험을 통하여 추출특성을 고찰하였다. 흡광도를 측정하여 추출제 KHA의 상간 분배계수와 해리상수, KHA와 구리간 킬레이트의 안정도 상수와 분배계수 및 총괄 추출 평형상수등을 구하고, 추출기구를 구명하였다 합성한 추출제에 의한 구리의 추출율은 pH 5 이상에서 거의 100%이었고, Cu-Zn-Cd 혼합 금속으로부터 구리의 선택적 추출이 가능하였다. KHA-클로로포름에 의한 구리의 추출 화학종은 $CuR_2$였으며 추출 평형 식은 $Cu^{2+}+2{\overline{HR}}{\rightarrow}{\overline{CuR{_2}}}+2H^+$로 표시되었다. $\beta$-ketohexanal as a chelating extractant was synthesized from the reaction of ethyl formate and methyl propyl ketone in the presence of sodium amide, and the equilibrium characteristics in the extraction of copper by $\beta$-ketohexanal-chloroform were investigated. The equilibrium constants such as the dissociation constant and the partition coefficients of $\beta$-ketohexanal, the stability constant and the partition coefficient of copper chelating complex, and the overall equilibrium constant in the extraction of copper were determined by spectrophotometric measurements, and the mechanism of extraction was proposed. The percent of extracted copper by $\beta$-ketohexanal-chloroform was near 100%, and the selective extraction of copper from Cu-Zn-Cd mixture was possible. Copper was found to be extracted as $CuR_2$ and the equilibrium reaction was expressed as $Cu^{2+}+2{\overline{HR}}{\rightleftarrows}{\overline{CuR{_2}}}+2H^+$.

β- ketohexanal 에 의한 Cu (Ⅱ) 의 추출 특성

신정호,이상훈,정갑섭,박경기,전상우 ( Jeong Ho Shin,Sang Hoon Lee,Kap Seop Jeong,Kyung Kee Park,Sang Woo Jun ) 한국공업화학회 1996 공업화학 Vol.7 No.6

Sodium amide에 의한 methyl propyl ketone과 ethyl formate의 반응으로 킬레이트 추출제의 하나인 β-ketohexanal(이하 KHA)를 합성하고, KHA-클로로포륨에 의한 구리의 추출평형 실험을 통하여 추출특성을 고찰하였다. 흡광도를 측정하여 추출제 KHA의 상간 분배계수와 해리상수, KHA와 구리간 킬레이트의 안정도 상수와 분배계수 및 총괄 추출 평형상수등을 구하고, 추출기구를 구명하였다. 합성한 추출제에 의한 구리의 추출율은 pH 5 이상에서 거의 100%이었고, Cu-Zn-Cd 혼합 금속으로부터 구리의 선택적 추출이 가능하였다. KHA-클로로포름에 의한 구리의 추출 화학종은 CuR₂였으며 추출 평형식은 Cu^(2+) + 2HR → CuR₂+ 2H^+로 표시되었다. β-ketohexanal as a chelating extractant was synthesized from the reaction of ethyl formate and methyl propyl ketone in the presence of sodium amide, and the equilibrium characteristics in the extraction of copper by β-ketohexanal-chloroform were investigated. The equilibrium constants such as the dissociation constant and the partition coefficient of β-ketohexanal, the stability constant and the partition coefficient of copper chelating complex, and the overall equilibrium constant in the extraction of copper were determined by spectrophotometric measurements, and the mechanism of extraction was proposed. The percent of extracted copper by β-ketohexanalchloroform was near 100%, and the selective extraction of copper from Cu-Zn-Cd mixture was possible. Copper was found to be extracted as CuR₂and the equilibrium reaction was expressed as Cu^(2+) + 2HR ↔ CuR₂+ 2H^+.

2, 4-Heptadione에 의한 Cu(II)의 용매추출특성

신정호,정갑섭,이상훈,박상욱,박대원,Shin, Jeong-Ho,Jeong, Kap-Seop,Lee, Sang-Hoon,Park, Sang-Wook,Park, Dae-Weon 한국공업화학회 1993 공업화학 Vol.4 No.4

2, 4-Heptadione(abbreviated to 24HTD) was synthesized from methylpropyl ketone and ethyl acetate with sodium amide, and the equilibrium and the kinetic characteristics of copper extraction by 24HTD-chloroform were investigated. Equilibrium constants such as the dissociation constant and the distribution coefficient of 24HTD and the stability constant of the 24HTD-Cu chelate were evaluated from the spectrophotometry, and the overall equilibrium constant of the extraction was also determined. The extracted species of the 24HTD-Cu chelate was found to be $CuR_2$ and the initial rate of the extraction of coupper by 24HTD in chloroform was expressed by $R_0=k[\bar{HR}]([Cu^{2+}]/[H^+])^{0.5}$. sodium amide에 의한 methylpropyl ketone과 ethyl acetate의 반응으로 2, 4-heptadione(이하 24HTD)을 합성하고, 클로로포름 용매하에 Cu(II)의 용매추출 실험으로부터 추출평형 및 추출속도 특성을 고찰하였다. 흡광도와 Cu(II)의 농도변화 측정으로부터 24HTD의 분배계수와 해리정수, 24HTD와 Cu 착화합물의 안정도 상수, 분배계수 및 총괄추출 평형정수 등을 구하고 추출기구를 구명하였다. 24HTD에 의한 Cu(II)의 추출 화학종은 1:2의 형태인 $CuR_2$였으며, 24HTD-클로로포름에 의한 Cu(II)의 총괄 초기 추출속도는 $R_0=k[\bar{HR}]([Cu^{2+}]/[H^+])^{0.5}$로 표시되었다.

2,4- Heptadione 에 의한 Cu (Ⅱ) 의 용매추출특성

신정호,정갑섭,이상훈,박상욱,박대원 ( Jeong Ho Shin,Kap Seop Jeong,Sang Hoon Lee,Sang Wook Park,Dae Weon Park ) 한국공업화학회 1993 공업화학 Vol.4 No.4

sodium amide에 의한 methylpropyl ketone과 ethyl acetate의 반응으로 2, 4-heptadione(이하 24HTD)을 합성하고, 클로로포름 용매하에 Cu(II)의 용매추출 실험으로부터 추출평형 및 추출속도 특성을 고찰하였다. 흡광도와 Cu(II)의 농도변화 측정으로부터 24HTD의 분배계수와 해리정수, 24HTD와 Cu 착화합물의 안정도 상수, 분배계수 및 총괄추출 평형정수 등을 구하고 추출기구를 구명하였다. 24HTD에 의한 Cu(II)의 추출 화학종은 1:2의 형태인 CuR_2였으며, 24HTD-클로로포름에 의한 Cu(II)의 총괄 초기 추출속도는 R_0= k(HR)( [Cu^(2+)]/[H^+])^(0.5)로 표시되었다. 2,4-Heptadione(abbreviated to 24HTD) was synthesized from methylpropyl ketone and ethyl acetate with sodium amide, and the equilibrium and the kinetic characteristics of copper extraction by 24HTD-chloroform were investigated. Equilibrium constants such as the dissociation constant and the distribution coefficient of 24HTD and the stability constant of the 24HTD-Cu chelate were evaluated from the spectrophotometry, and the overall equilibrium constant of the extraction was also determined. The extracted species of the 24HTD-Cu chelate was found to be CuR_2 and the initial rate of the extraction of copper by 24HTD in chloroform was expressed by R_0=k[HR]([Cu^(2+)]/[H^+])^(0.5).

정착화된 영상복원을 이용한 공간 적응적 영상보간

신정호,정정훈,백준기,Shin, Jeong-Ho,Jung, Jung-Hoon,Paik, Joon-Ki 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.11

We propose a spatially adaptive image interpolation algorithm, which can restore high frequency details in the original high resolution image. In order to apply the regularization approach to the interpolation procedure, we first present a two-dimensional separable image degradation model for a low resolution imaging system. According to the model, we propose a regularized spatially adaptive interpolation algorithm by using five different constraints. We also analyze convergence of the proposed algorithm, and provide some experimental results to compare the proposed algorithm with its nonadaptive version. 본 논문에서는 원영상이 가지고 있는 고주파 성분을 효율적으로 복원할 수 있는 공간 적응적 영상보간(image interpolation) 알고리듬을 제안한다. 영상이 갖고 있는 선험적 정보(a priori knowledge)를 보간 과정에 적용하기 위해서는, 우선 저해상도의 영상 시스템을 나타내는 분리 가능한(separable) 2차원 열화모델(degradation model)을 결정한다. 이렇게 결정된 열화 모델에 따라 다섯 가지의 서로 다른 제약 조건들을 사용하여 정칙화에 기반을 둔 공간 적응적 영상보간 알고리듬을 제안한다. 또한, 제안된 알고리듬의 수렴성을 분석하고, 실험 결과를 토대로 비적응적인 방법과 제안된 알고리듬의 성능을 비교한다.

디지털 캠코더용 영상확대 시스템의 VLSI 구현

신정호,정정훈,백준기,김효주,Shin, Jeong-Ho,Jung, Jung-Hoon,Paik, Joon-Ki,Kim, Hyo-Ju 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.9

본 논문에서는 캠코더용 디지털 영상 확대 시스템의 VLSI 구현 기술을 제안한다. 제안된 VLSI는 입력 신호로써 시스템 클럭(CLK), 수직 동기 신호(VD), 수평 동기 신호(HD), 블랭크(BLK), 필드 신호(FLD)등을 사용하여 출력으로 최대 256배까지, 256단계의 다양한 배율로 확대된 영상을 구현할 수 있다. 일반적으로 대부분의 캠코더는 앞서 언급한 입력 신호들을 CCD 구동 IC에서 발생시킨다. 본 논문에서 제안한 디지털 영상확대 VLSI는 줌 스텝의 변화에 따라서 256가지의 다양한 배율로 영상을 확대할 수 있으며, 응용 측면에 있어서는 거의 연속적인 단계의 확대를 수행할 수 있기 때문에, 디지털 캠코더에서 별도의 마이콤이나 범용 신호처리기 등과 같은 부가 회로 없이도 사용할 수 있다. In this paper we propose a VLSI implementation technique for camcorder's digital zooming system. The proposed VLSI includes the system clock(CLK), vertical drive(VD), horizontal drive(HD),blank(BLK), and field(FLD) signals as inputs, and produces magnified image as an output, with 256 different magnification ratios. In general, the above mentioned input signals are provided by the CCD driving IC in most camcorders. As a result, the proposed digital zooming VLSI can magnify a part of the input image by up to 256 times, where the magnification ratio can be chosen among 256 different steps. In the application point of view, the proposed VLSI can be used in any digital camcorder for realizing near continuous step digital zooming without any additional circuitry, such as micom or a general purpose digital signal processor.

CuS 침전의 기포흡착분리에 관한 연구

신정호,박경기,정갑섭,이근희 ( Jeong Ho Shin,Kyung Kee Park,Kap Seop Jeong,Geun Hee Lee ) 한국공업화학회 1998 공업화학 Vol.9 No.1

CTAB에 의한 CuS 침전 미립자의 응집과 기포 흡착특성을 고찰하였다. CTAB의 기포흡착은 Langmuir흡착식을 따르며, 포말간 본체액의 동반을 고려한 회분해석으로부터 구한 흡착열은 3700 cal/mol로 나타났다. CTAB에 의한 CuS미립자의 기포흡착은 기포-입자간 충돌흡착으로 설명되었고, 흡착분리에 대한 최적 농도비는 CuS의 최적 응집농도비와 일치하였으며, 그 값은 [CTAB] 대 [CuS]가 0.1로 얻어졌다. 기포에 의한 포집효율은 pH와 CTAB농도 등에 의존하나 공기의 유량에는 무관하였으며, 최대 포집효율은 최적 첨가농도에서 0.0002로 나타났다. 또한 Cu-Cd-Zn 황화물의 흔합계에서 CTAB를 사용한 기포흡착의 경우 ZnS의 선택적 분리가 가능하였다. The characteristics of the bubble adsorptive separation of CTAB(cetyltrimethylammonium bromide) and CuS precipitates was investigated. The Langmuir adsorption equation was adequate at very low concentration of CTAB, and the adsorption heat was determined from the batch analysis considering the bulk liquid accompanied between bubbles. The adsorption mechanism was explained with the collision adsorption between bubbles and precipitate particles. The optimum concentration ratio of [CTAB] to [CuS] for adsorptive separation was 0.1 and coincided with the ratio for the coagulation of particles. The collection efficiency was depended on pH and CTAB concentration but independent of the air flow rate, and the maximum efficiency was 0.0002. The selective separation of ZnS from the mixture of Cu-Cd-Zn sulfides was obtained by the bubble adsorption with CTAB.

타이완의 현대사 전개와 2,28문학

신정호 ( Jeong Ho Shin ) 성신여자대학교 인문과학연구소 2012 人文科學硏究 Vol.30 No.-

This paper has been written to review the status of the literary history of "February 28 literature" which was distorted in the magnetic field of the post colonial discourse including the spirit of exodus from China, so called Taiwan independence spirit, which has been actively put forward in Taiwanese literary world after martial law was released in 1987. According to the review, the spirit of exodus from China has seldom been found in the works such as Lv He-ruo`s short story "Winter Nights", Ou Tan-sheng`s "A Gosling", Qiu Tian-ping`s "Rural Self-Defense Forces", Ou Tan-sheng`s "Get Drunk", and Bo Zi`s "Blood and Regret of Taiwan Island" before and after "February 28 case" in 1947. These novels reflect well 1) Cheers for the termination of imperialist wars from China and 2) Expectations about establishing the constitutional laws of China and Taiwan`s law based governing. However, Japanese colonial would not allow Taiwanese to use the standard language of China, so called mandarin, resulting in the deepening conflicts due to communication difficulties between the Nationalist Party(KMT) rulers and local Taiwanese residents. Then, the relationship between local residents and immigrants from Mainland China grew into hostility after the February 28 case. Thereafter, during the martial law periods of between 1949 and 1987, Taiwan`s independence spirit deepened internally and new February 28 literature which has the spirit of the exodus of China emerged after ban-lifting. Based on these points, this paper emphasizes that the spirit of February 28 literature was based not on the post colonialism but on the anti colonialism at that time and presents the perspective that the post colonialism of Taiwanese literature must restart from the recovery of the anti colonialism.