Mouse의 간과 신장에 흡수된 카드뮴 함량에 대한 differential pulse stripping polarography 분석

김일광,이종섭,최창진,유일수,정우일 圓光大學校 基礎自然科學硏究所 1989 基礎科學硏究誌 Vol.8 No.1

The effects of protein 3nd onion extracts or the absorbed cadmium concentration in kidney andliver of mouse was stvdied by differential poise stripping polarography. The obtained results were as follows, 1. The absorbed cadmium concentration was decreased as the protein diet was increased. 2. Where as the onion ertracts diet was increased, tile absorbed cadmium concentration was decreased. 3. As the coeffects of protein and onion extracts, absorbed cadmium concentration was drantaticallydecrcased. 4. Generally, the absorbed concentration In kidney in higher than in liver while the absorbed concentration in liver is peculiarly higher than kidney in above case.

Micelle 용액에서 Co(II)-tetraphenylporphyrin의 전기 화학적 환원에 관한 연구

金日光,金潤根 圓光大學校 基礎自然科學硏究所 1985 基礎科學硏究誌 Vol.4 No.1

The electrochemical reduction of Co(Ⅱ)-tetraphenylporphyrin at a static mercury drop electrode in micelle nonaqueous solution has been examined DC polarography, DP and cyclic voltammetry. The polarographic data shown to be three-electron transfer in three reduction steps. But, the cyclovoltammetric results shown to be four reduction steps in electrode reaction. The reduction waves shown to be three reversible electron transfer and one irreversible electron transfer reduction. The hight of reduction waves were eliminated in the cationic surfactant CTABr and nonionic surfactant triton x-100 solution. In anionic surfactant NaLS solution, the half-wave potential was shifted to the high negative potential and the height is increased.

마이셀용액에서 크롬(Ⅴ1)의 전기화학적 환원에 관한 연구

김일광,성낙도,천현자 圓光大學校 1984 論文集 Vol.18 No.2

The electrochemical reaction of chromium (Ⅵ at a static mercury electrode in micelle aqueous solution has been examined by DC polarography, DP polarography and cyclic voltammetry. The polarographic and cyclic voltammetric data shown to be chemical reactively irreversible process of chromium (Ⅵ) electrode reaction. the height of reduction waves and halfwave potentials were shifted to the more negative patential in the NaLS, CTABr solution. When chromium (Ⅵ) ion was reduced in basic solution, the following possible mechanism was portulated. ?? In acidic solution, the reduction of chromium (Ⅵ), dimer proceeds by a six-electron transfer to form chromium (Ⅲ). Therefore the following reduction was suggested. ??

신문방송학과 대학원 세미나에 관하여

김일광 漢陽大學校 社會科學大學 新聞放送學科 1987 크로노스 Vol.- No.20

본교 대학원에서는 정규 교과과정 외에 언론학세미나를 별도로 실시하고 있다. 이 세미나는 전국의 대학원 중 유일하게 한양대학교 신문방송학과만이 운영하는 독특한 프로그램으로서 학점과 관련은 없지만 반드시 이수해야하는 독특한 운영방식을 채택하고 있다. 이 세미나는 언론학 전반에 걸친 최신이론 등 시의 적절한 주제를 체택, 세미나 개최 전에 미리연구ㆍ분석한 후 발표자가 내용을 요약ㆍ발표 하면 추천교수가 발표내용을 강평하고 내용을 보완하는 동시에 발표된 내용을 토대로 참석자 상호간에 공개토론을 벌임으로써 좀 더 다양한 시각과 이론연구의 방법론을 조명해보는 계기로 삼고 이론과 현실의 접목을 시도하여 특정한 이론과 시각에 편중하는 오류를 방지하는 효과를 거둘 수 있다. 이 세미나를 통해 대학원생들은 자신의 학위논문을 작성하는데도 많은 도움을 받고 있는데, 우선 광범위한 연구분야를 접하여 논문작성에 필요한 정보를 얻을 수 있고 또한 학기말에는 이 세미나에서 자신의 학위논문을 발표하고 비판받는 기회를 마련해 좀더 수준높은 논문으로 발전시킬 수 있는 잇점이 있다. 이 세미나는 기존의 세미나방식을 개선, 좀더 내실을 기하기 위해 86년도부터 현재와 같은 방식으로 진행되고 있는데 이와 같은 세미나는 우리나라에서는 처음 시도되는 것으로 미국 아이오와 대학교 대학원 박사과정 세미나에서 그 형식을 도입한 것이다. 이 세미나는 우리나라 교육의 단점으로 지적되는 일방적인 주입식 교육을 탈피하여 공개토론을 통해 아이디어를 정리하고 토론능력을 함양하는 효과를 거둘뿐만 아니라 교수와 학생간에 자유로운 의견교환의 분위기를 만들어 새롭고 발전적인 학문연구풍토를 마련해 나간다는 점에서 커다란 의의를 찾아볼 수있겠다. 이 세미나는 한양대학교 신문방송 학과가 심혈을 기울여 발전시켜 나가는 핵심사업으로 초창기임에도 불구, 교수 및 대학생 전원이 참여해 날로 그 성과를 더해가고 있다.

4-Nitro-N-(triethoxy phosphoranylidene)의 전기화학적 환원에 관한 연구

金日光,李英行,崔昌鎭 圓光大學校 基礎自然科學硏究所 1985 基礎科學硏究誌 Vol.4 No.1

The electrochemical reduction of 4-nitro-N-(triethoxy phosphoranylidene) has been examined by polarography, cyclic voltammetry, controlled potential coulometry in acetonitrille and micelle solution. The reduction of 4-nitro-N-(triethoxy phosphoranylidene) proceeds by a one electron-transfer to form anion radical which undergoes both protonation and a second one electron reduction followed by cleavage of the phosphorus-nitrogen double bond. p-Nitroaniline and triethoxy phosphine are the major products. The polarographic half-wave potential shown to be more negative potential shift in the micelle solutions.

Coumarin 유도체의 전기화학적 분석

김일광,한현호 圓光大學校 基礎自然科學硏究所 1989 基礎科學硏究誌 Vol.8 No.1

The extract and a electrochelnical analysis for coumarin and 7-acetoxy-4-(bromomethyl) coumarinin serum have been investigated. The simultaneous analysis of coumarin and 7-acetoxy-4-(bromomethyl) coumarin by differential pulse polarographic method was conducted using 0.1M tetraethyl ammonium perchlorate supporting electrolyte and Ag-AgCl reference electrode in acetonitrile after extractionon C_18 Sep-Pak columm. The cathodic halfwave potential for coumarin and 7-acetoxy-4-(bromomethyl) coumarin were about -1.63vo1ts and -0.36vo1ts respectively. The recoveries for coumarin and7-acetoxy-4-(bromoethyl) coumarin on C_18 Sep-Pak column with acetonitrile were more than92% in serum.

한국과 우즈베키스탄 교역 활성화 방안에 관한 연구

김일광 한국해양비즈니스학회 2022 해양비즈니스 Vol.- No.53

Trade between Korea and Uzbekistan has been steadily increasing since the establishment of diplomatic ties. The two countries have a high degree of concentration on export items and target countries. For stable economic growth, it is necessary to alleviate this phenomenon. Therefore, in this paper, the export concentration phenomenon of both countries is analyzed and export diversification strategies are presented. It is effective for Korea to increase exports in automobiles and parts, rubber, plastics and electrical equipment. Uzbekistan needs to export silk, cotton, wood/pulp, grain, etc. in an additionally processed form to expand exports and increase added value. It has presented export-promising items for revitalizing trade between the two countries, and it is expected that export growth and export diversification can be achieved if the methodology is expanded to more detailed items and applied to all countries. As the next research topic, export diversification strategies by item unit and service industry export expansion are needed.

α,β-Dibenzyl N-Benzylidene L-Aspartate의 Imino기에 대한 선택적 전해환원반응

金日光,金潤根,李英行,蔡奎允 圓光大學校 基礎自然科學硏究所 1989 基礎科學硏究誌 Vol.8 No.3

0.1M LiCl의 ethanol용액에서 α,β-dibenzyl N-benzylidene L-aspartate의 전기화학적환원을 direct current, differential pulse polarography, cyclic voltammetry 그리고 controlled potential coulometry 방법으로 연구하였다. α,β-dibenzyl N-benzylidene L-aspartate의 환원과정은 1단계(-0.92volts vs. Ag-AgCl)에서 양성자 첨가와 2전자 이동에 의한 완전 비가역의 CEC 혹은 CE 반응기구로 진행되었으며 α,β-dibenzyl N-benzyl L-aspartate가 생성되었다. 계면활성제가 포함된 용액에서 polarography 환원파는 전체적으로 약간 억제되었으며 Triton X-100의 농도가 진해질수록 비가역성을 증자시키는 것으로 나타났다. 생성물 분석과 pH변화에 따른 전극환원과정에 대한 고찰로 전기화학적 반응기구를 제안하였다. The electrochemical reduction of α,β-dibenzyl N-benzylidene L-aspartate in 0.1 MLiCl ethanol solution was investigated by direct current (DC), differential pulse (DP) polarography, cyclic voltammetry and controlled potential coulometry (CPC). The irreversible reductive amination of iminogroup proceeded to form α, β-dibenyl N-benzyl L-aspartate by CEC or CE electrochemical reaction mechanism at the first reduction step (-0.92 volts vs. Ag-AgCl). The polarographic reduction wave was slightly suppressed due to inhibitory effect of micelle, while the irreversibility was increased according to the increase of Triton X-100 concentration. Upon the basis of product analysis and polarogram interpretation with pH change, possible CE electrode reaction mechanism was suggested.

1-Benzyl-4-Iodomethyl-2-Azetidinone의 합성과 lodo기에 대한 전기화학적 환원반응

金日光,李英行,李寀浩,蔡奎允,金潤根 원광대학교기초자연과학연구소 1992 基礎科學硏究誌 Vol.11 No.3

1-Benzyl-4-iodomethyl-2-azetidinone(BIMA)을 합성하여 iodomethyl기에 대한 전기화학적 환원을 direct current, differential pulse polarography, cyclic voltammetry 그리고 controlled potential coulometry 방법으로 연구하였다. BIMA의 환원과정은 1단계(-1.35 volts vs. Ag-AgCl)에서 완전비가역과 2전자이동 후에 양성자가 첨가되는 EEC 반응기구로 진행되었으며 1-benzyl-4-methyl-2-azetidinone이 생성되었다. 양이온 계면활성제(cetyltrimethylammonium bromide)의 농도가 진하여질수록 양전위 이동이 있었으나 음이온 계면활성제(soduim lauryl sulfate)의 경우에는 2단계로 세분화되는 현상이 나타났다. pH변화에 따른 전극환원과정과 생성물 분석의 결과를 바탕으로 전기화학적 반응기구를 제안하였다. 1-Benzyl-4-iodomethyl-2-azetidinone(BIMA) was synthesized and its electrochemical reduction was investigated by direct current, differential pulse polarography, cyclic voltammetry and controlled potential coulometry. The irreversible two electron transfer on reductive dehalogenation of iodo group proceeded to form 1-benzyl-4-methyl-2-azetidinone by EEC electrode reaction mechanism at the first reduction step(-1.35 volts vs. Ag-AgCl). The polarographic reduction waves separated into two reduction steps due to anionic surfactant(soduim lauryl sulfate) effects, while the waves were shifted to the positive potential as the concentration of cationic surfactant(cetyltrimethylammonium bromide) increased. Upon the basis of results on the product analysis and interpretation of polarogram with pH variable, EEC electrochemical reaction mechanism was suggested.

6,6-Dibromopenicillanic acid 1,1-Dioxide 분자내 탄소 6-위치 브롬기의 전극촉매 수소화반응과 전극반응기구

金日光,李英行,李寀浩 원광대학교기초자연과학연구소 1992 基礎科學硏究誌 Vol.11 No.3

The electrochemical reduction of carbon-6-dibromo groups on 6,6-dibromo penicillanic acid 1,1-oxide(DBPA) was investigated by direct current, differential pulse polarography, cyclic voltammetry and controlled potential coulometry. The irreversible two electrons transfer on the reductive debromination of each bromo group proceeded by EC,EC mechanism at the two electrode reduction steps(-0.48, -1.62 volts). The 6-bromo-PA and 6,6-dihydro-PA was synthesized by controlled potential electrolysis. Upon the basis of results on the products analysis and interpretation of polarograms obtained at various pH, electrochemical reaction mechanism was suggested. 6,6-Dibromopenicillanic acid 1,1-dioxide(DBPA)의 6위치 dibromo기의 전기화학적 환원을 direct current, differential pulse polarography, cyclic voltammetry, 조절전위 전기량법으로 연구하였다. DBPA 환원과정은 2단계(-0.48, -1.62 volts)에서 모두 완전비가역으로 2전자씩 이동하는 EC, EC 반응기구로 진행하였다. 조절전위 전기분해를 이용하여 6-bromo-PA와 6,6-dihydro-PA를 단계적으로 합성하였으며, pH 변화에 따른 폴라로그램의 해석과 생성물 분석의 결과를 바탕으로 전기화학적 반응기구도 제안하였다.