클로로필의 에너지 억제에 대한 용매 특성

朴冕用 건국대학교 1982 學術誌 Vol.26 No.2

The state of aggregation and segregation of chlorophyll-a has been deduced from absorbance and fluorescence spectrophotometry. The aggregated and segregated chl-a were identified by critical point which were appeared on absorbance curves of each λmax. verse the concentration of nucleophilic n-propyl alcohol added into non-polar iso-octane. The fluorescence excitation and emission yields were increased on the increasing of aggregation and decreased on the increasing of segregation.

Silicone-pyridine에 대한 Chlorophyll-a와 -b의 혼합착물의 형광연구(Ⅳ)

박면용,박택규,정구춘 建國大學校基礎科學硏究所 1987 理學論集 Vol.12 No.-

클로필-a와 -b를 혼합물의 상태로 1:2, 1:4, 1:6의 polydimethylethylsilane(0-2 -pyridylethyl methylsilane)에 Mg-pyridine 착물로 디에틸에테르중에서 결합시키고 중합체 사슬을 통한 에너지 이동을 연구하였다. Chl-b에 대한 Chl-a의 첨가량이 증가할수록 Chl-a의 혼합비(5:1, 3:1, 1:1)에 따라 형광수득율이 증가하였다. 반대로 Chl-b가 Chl-a에 비하여 첨가량이 증가할수록 형광수득율이 감소하였다. 최대 형광세기는 Chl-a와 Chl-b에 대하여 결합한 pyridine의 당량농도에서 나타났다. Chl-a에 의하여 흡수된 에너지는 중합체의 사슬을 통하여 Chl-b로 이동하였고 그 이동경향은 dimer>tetramer>hexamer의 순서로 증가하였다. The chlorophyll-a and -b have been bound 1:2, 1:4 and 1:6 polydimethyl ethyl silane(0-2-pyridylehylmethylsilane) as the mixed state to form the complex compound of Mg atom on chlorophyll and pyridine on the polymer in diethyl ether, and studied about the energy migration through the polymer chain in the same solvent. The more chl-a were added to chl-b the more increased fluorescence yields of chl-b were shown it to match for the mixed ratios of chl-a: chl-b in the order of 5:1, 3:1 and 1:1, while chl-a was shown the more decreased fluorescence yields according as the more chl-b were added. The maximum fluorescence intensity were appeared at equivalent pyridine concentration bound to the chl-a and -b. The absorbed energy by chl-a were transfered to chl-b through the chain, and the migration tendencies were on the increase of dimer>tetramer>hexamer.

이산화티탄의 세라믹 이온-선택성 막전극

박면용 建國大學校基礎科學硏究所 1991 理學論集 Vol.16 No.-

이산화티탄계의 화합물을 이용한 이온 선택성 막전극을 개발하기 위한 첫단계의 실험으로서 이산화티탄만을 이용한 소결 막전극을 재료로 이용하여 연구하였다. 이산화 티탄으로 만든 막을 2,614∼2,700℃에서 소결하여 수용액중의 이온에 대하여 감응도를 측정한 결과는 Ag(l) ??, ??, ??, ?? ?? 까지 각기 이온 선택성을 나타냈다. Ion-selective electrode made from titanium dioxide have been studied for development of metal-titanium dioxide system electrode. The titanium dioxide selectrode sintered at 2,614∼2,700℃was responded selectively to silver(??), phosphate(??) and monohydrogen phosphate (??) in aqueous solution. According to experimental results metal-titanium oxide compounds were expected to be usable for materials of ion-selective electrode.

양이온 교환수지에 의한 구리의 지금 및 합금의 분리정량

박면용,이병조 건국대학교 1971 學術誌 Vol.12 No.1

The mixed sample containing 0.1 m.mole of following metals, Fe(III), Bi(III), Cu(II), Pb (II), Zn (II), and Ag (I), are separated into its components with the exception of Fe (III) and Bi(III), through cation exchange resin, Dowex 50w×8(100∼200mesh), 10cm column, with the mixed solution of HAc and NaAc as the eluent. The recoveries of cations eluted, are more than 99%. The elution curves of Fe (III) and Bi (III) overlap each other and are difficult to separate. The determination of Fe (III) and Bi (III) in this effluents, however, can be carried out without any interference by sepectrophotometry. For a sample containing large quantity of copper, a longer column has to be used for separation, that is, 30cm column are used for the impurities of Fe (III), Bi (III), Pb (II), Zn (II) and Ag(I), in copper metal, and 20cm column for the components of Cu(II), Pb(II), Zn (II) and Sn (IV) in bronze alloy.

착물의 생성과 안정도상수 계산 방법에 대한 이론적 고찰

박면용,이종만 건국대학교 1975 文理論叢 Vol.4 No.1

During the last two decades an enormous amount of information concerning complex equilibria has been published and calculation methods have been developed for the evaluation of stability constants from such data In this paper, a much stronger emphasis is laid on mixed liqand, protonated, polynuclear and outer sphere type complexes which are treated in some detail, and seemed appropriate to give first of all a survey of complex equilibria and to treat some fundamental concepts in connection with equilibria constants, and some related general problems are discussed.

微量分析의 取扱法

朴冕用 건국대학교 1973 文理論叢 Vol.2 No.1

ppm∼ppb 범위의 무기 혹은 유기분석에서 용액의 취급방법은 보정과 검출한계성에 중요한 역활을 한다. 몇개의 참고 문헌을 이용하여 미량분석에 수반되는 오차와 시료(試料)의 녹임에 대하여 검토하였다. L'auteur passe en revue, quelques publications traitant de me´thodes de pre´paration et de dissolution d'e´chantillons a l'etat de traces avant leur dosage. Les erreurs dans ces me´thodes, rendues plus difficiles a´ re´duire a´ cause des operations supplementaires exige´es, sont compare´es a´ celles associe´es aux methodes plus directes. Dans le dosage d'e´lements au niveau de la ppb dens les matrices mine´rales et organigues, les techniques en solution sont utiles parce qu'elles simplifient les proble´mes d'etalonnage et ame´liorent la limite de de´tection.

산화제이철 및 칼슘페라아트 이온 선택성 막전극

박면용,이명재,조동희,원충택 建國大學校基礎科學硏究所 1992 理學論集 Vol.17 No.-

The ion-selective electrode based on ferric oxide and calcium ferric have been studied to ionic sensitivities, selectivities and response behaviors in aqueous solution. The membrane selectrode of ferric oxide was prepared by using α-ferric hydroxide from ferric nitrate solution at pH 4.5∼6.0 . The membrane were sintered at 1,200℃ and 1,350℃. Calcium ferrite was prepared by mixing ferric oxide with calcium oxide on molar ratio of 0.8 : 0.2 and the selectrode membrane based on calcium ferrite was sintered at 1,100℃ Membrane seletrode of ferric oxide was responded without any selectivity to Ag? Ni?, Ca?, Bi?, Ci?, HCO₃?, CIO₄? and NO₃? ion. Membrane seletrode of calcium ferric responded except sensitivity to Ag?, Be?, Cu?, Cr?, Bi?, HCO₃?, CO??, and S??, but their sensitivities were agreed with Nernstain solpe. The selectrode of calcium ferrite was shown reproducible potential response to ions in the solution for six months

양이온 교환 수지에 의한 아연의 지금 및 혼합물의 분리 정량

박면용 건국대학교 1970 學術誌 Vol.11 No.1

The impurities of Fe(III), Bi(III), Cu(II), Pb(II), Cd(II), and Ag(I) in zine metal are separated by the elution through 3.14cm2×25cm cation exchange resin, Dowex 50w×8(100∼200mesh), column with the mixed eluents of HAc and NaAc as eluents. The recoveries of all the ions are more than 99% and Fe(III) has a long tailing. The mixtures composed of Fe(III), Bi(III), Cu(II), Pb(II), Cd(II), Zn(II), and Ag(I) nitrate are dissolved in Nitric pH 1 solution and separated into its component through 3.14cm2×10cm column with the same eluents. Its recoveries are also found to be more than 99%.

페놀수지의 열처리 영향에 대하여

朴冕用,李文壽,鄭求春 建國大學校附設 應用科學硏究所 1978 理學論集 Vol.4 No.-

An infra-red absorption which is characteristics to the novolac resin is occurred at 1,000 ??, and this peak is useful for the identification of novolac phenol resin from resolic phenol resin. The relative intensities of infra-red absorption peaks at 813.01 and 751.88 ?? of novolac and resolic phenol resin samples did not show the significant changes for 60 min. at 140℃ and 120℃, but they were changed as a function of heat-treated time from 60 min. thereafter.

우리나라 鍾乳窟의 特性과 環境汚染에 關한 硏究

洪始煥,朴冕用 건국대학교 1979 學術誌 Vol.23 No.2

This paper reviews the general status of stalactite caves which were found and are utilized for sight-seeing in Korea, and also summarizes the results of investigations on properties of natural stalactite caves. The cavernous phenomena such as the water quality, atmospheric phenomena, secondary grown products, ecological adaptation, environmental pollution and the breakage of stalactite are compared between those of cave a which are opened already sight-seeing and unresults are discussed and also compared with the caves in other countries. Environmental pollutions in Korean stalactite caves are as the following : The animate matters in caves are disappeared gradually from the time of exposure for sight-seeing. The kinds and abundance of the animate matters favoring the cavernous life or coming from the outside of caves have relativity to temperature, moisture and atmospheric conditions in caves. The water quality is consistent throughout the entire flow passage in a cave, but calcium content were less with the increase of flowing water volume in a cave. Atmospheric phenomena at entrance of a cave show a slight difference from the inner atmosphere, and the moisture content in cavernous atmosphere are increased with the cave depth. The secondary growth of stalactite are not taken place at the entry, because of low moesture content in air. However, stalactite secondary growth were prominent at inner cave where the moisture content is more than 90%. The temperature variation in the caves are negligible through all seasones in a year. The following conditions are critical to conserve the cavernous environmental pollution and the original form of caves. Some caves should not be exposed to the sight-seeing for academic studies. If the caves are open for sight-seeing, the entrance should be restricted with an adequate to limit the changes of atmospheric phenomena. In rainy season, the surface water flowing outside of cave should be protected from entering into the caves and water pool should be drained out to outside of cave. Proper number of waste cans should be provided along the pathway in the caves.