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정인재,한기수,정성은 한국화학공학회 1985 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.23 No.4
PVC로부터 활성탄을 얻는데는 탈염화수소단계와 고온에서 활성화시켜 비표면적을 크게하는 단계로 구성된다. 후자의 단계에는 많은 에너지가 필요하고 수율도 낮으므로 본 연구에서는 이 단계를 거치지 않고 PVC를 탈염화수소시켜 얻은 char에 산성관능기를 부착시켜 이용해 보고자하였다. PVC를 탈염화수소 시키는 두가지 방법, 직접 열을 가하는 열분해 방법과 가성소다 용액을 이용하는 방법을 비교해 보았다. 전자의 방법이 후자의 방법보다 방향족 구조를 더 많이 갖긴 했으나, 어느 방법을 이용하든 PVC에서 얻어진 char는 기본적으로 polyene구조를 가졌다. 가성소다 용액을 이용한 탈염화수소 반응은 2차반응이였으며, 이 반응의 활성화 에너지는 21.8㎉/mole이었다. 탈염화수소된 PVC의 char를 질산으로 표면처리할 때 질산농도 3-7N에서는 3-4m-equivalnt HNO₃/g-char의 질산이 흡착되었다. 이 질산처리된 char의 비표면적은 8㎠/g을 넘지 않았으나, 납이온에 대한 흡착력은 질산처리된 비표면적이 큰 활성탄 못지않게 좋은 흡착력을 보였다. In the production of activated carbon from PVC, there may be two stage process : the first stage is the dehydrochlorination of PVC to obtain char rich in carbon and the second is the activation of char at high temperaturc to obtain high surface area. The latter process requires high energy consumption and the yield is very low. Therefore, instead of this process, the method to attach acidic functional groups on the surface of the char was used. Compared were two methods of dehydrochlorination of PVC : thermal decomposition by heating PVC directly and dehydrochlorination by using sodium hydroxide solution. While the former method gave more aromatic structures to the char than the latter, the char obtained by either method had basically polyene structures. Dehydrochlorination by using NaOH solution showed second order reaction and the activation energy of 21.8 ㎉/mole. The PVC char was oxidated with HNO₃ solution of 3N -7N concentrations and showed the ion exchange capacity of 3-4 m-equivalent HNO₃/ g-char. Although the surface area of the char was not over 8 ㎡/g-char, its adsorption capacity of lead ion was nearly the same as that of activated carbon with large surface area treated with HNO₃ solution.
2P-373 Enhancement of Biomass Productivity in Ocean Floating Ponds with Various Designs
정인재,박재훈,박한울,김지훈,임상민,이철균 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Biofuels from microalgae are considered as one of the potential renewable and sustainable energy sources. However, high costs for construction and operation of culture systems and supplying nutrients have in conventional land-based culture systems. Ocean floating ponds are exposed to restless waves that could be utilized for culture agitation could help reduce costs in algal cultivation. In this study, various designs of floating ponds were used for cultivation of Tetraselmis sp. MBEyh04Gc to evaluate their performances in terms of algal biomass productivity. Compared with a basic design, alternative designs led to more uniform culture distribution in the floating ponds. Furthermore, some design also improved light utilization efficiency by 132%, which led to a 195% -higher biomass productivity than in the basic design. Further optimization with better geometry could enhance algal biomass productivity in the ocean floating ponds.
中樞神經興舊性 藥物이 Aspirin의 藥物動力學的 效果에 미치는 影響에 關한 硏究
정인재 德成女子大學校 藥學硏究所 1990 藥學論文誌 Vol.1 No.1
Studies were made on the biopharmacokinetics of aspirin and concurrent administration of CNS stimulants (ephedrine, caffeine) by examing the blood concentration of rabbits which had been administered them orally. Simultaneous administration of aspirin and CNS stimulants resulted in an increased absorption rate of aspirin as follows. The absorption rate percentage at the time of peak concentration, aspirin was 79.45% at 2hr, with epedrine was 91.2% at 2hr, and with caffeine was 81.30% at 1.5hr. And also the absorption rate constant (Ka) of aspirin was altered by CNS stimulants: the Ka of aspirin was 0.518hr, with ephedrne was 1.320hr, and with caffeine was 0.230hr. The elimination of aspirin was reduced by ephedrine and accelerated by caffeine. The elimination rate constant(Kel) of aspirin was 0.115hr, with ephedrine was 0.046hr, and with caffeine was 0.138hr. Peak concentrations in blood were achived more quickly by caffeine. The biological half-life of aspirin was 6.02 hours. It was prolonged by ephedrine to 15.06 hours and reduced by caffeine to 5.02 hours. The apparent volumes of distribution (Vd) of aspirin were 73.64ml. When aspirin administered with ephedrine, the Vd values were changed to 93.17ml, and with cafferine to 78.87ml. The area under the curve(AUC) of aspirin was increased by concurrent administration of ephedrine from 42.8 mg/ml · hr to 105.04 mg/ml · hr, and decreased by caffeine to 33.87 mg/ml · hr. The values of AUC accorded with the inhibition % of analgesic effect on acetic acid induced writhing ayndromes.