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수정진동자를 이용한 프탈로시아닌 LB박막의 NO2 감지 특성
권현정,이영진,장용근,김종득 ( H . J . Kwon,Y . J . Lee,Y . K . Chang,J . D . Kim ) 한국센서학회 1998 센서학회지 Vol.7 No.4
Multilayer Langmuir-Blodgett (LB) films coated on quartz crystal microbalance (QCM) of octa-substituted metallophhtalocyanines (MPc(OEH)_8, M = Cu, Co, and Sn) and dihydrogen phthalocyanines (H₂Pc(OEH)_8) were used to quantify NO₂ concentrations. They were exposed to various concentrations of NO₂ in dry N₂. Among the four phthalocyanines we tested, the metal-free H₂Pc(OEH)_8 was observed to be m48t sensitive to NO₂. However, its LB film showed a partially irreversible behavior, that is part of the frequency change due to NO₂ adsorption could not be recovered even after purging with pure N₂ gas for an extended period. Examining the spectra of NMR and FTIR revealed fact that the irreversible portion of frequency change was due to ether groups in the linkage between side chains and the Pc unit. In order to remove the effect of such initial deactivation, on NOD quantification experiment, a freshly fabricated LB film was treated at a high concentration of NO₂ so that the ether sites were saturated. A pretreated LB film showed a reproducible performance for repeated uses. The CuPc(OEH)_8 LB film showed a satisfactory sensing performance down to as low as 4 ppm. For the H₂Pc(OEH)_8 LB film, the lower detection limit was found to be 35 ppb of N02. In order to make the experimental condition more realistic, the carrier gas, dry nitrogen, was replaced by air. It was observed that the presence of oxygen, a weak electron acceptor, reduced the sensitivity and thus increased the sensing limit to hundreds of ppb. Results of experiments with moisture added showed that the interference of moisture was quite severe.
Aminoglycoside계 항생제에 대한 약물사용검토 연구
심영희,권현정,신현택,최강원 대한화학요법학회 1988 대한화학요법학회지 Vol.6 No.1
A retrospective drug utilization review(DUR) study was conducted on commonly used aminoglycoside antibiotics(gentamicin, tobramycin, and amikacin) by reviewing patients charts. The audit criteria for the use of these antibiotics established by Henricks J.N. was selected, reviewed and utilized in DUR process. Total 218 charts of patients who treated with aminoglycosides in department of internal medicine from May 1 to July 30, 1987 were retropectively reviewed. As the results, 182 cases(83.5%) were met with the criteria for the justification of use, while remaining 36 cases(16.5%) were deviated from the criteria. In analysing process indicators, several criteria including body temperature monitoring, maintenance dosage and WBC monitoring were relatively well documented showing the accepted levels above 90%, while loading dose administration, serum drug level monitoring. dosage adjustment to avoid toxicity and other measurements for monitoring toxicity were infrequently documented showing low accepted levels below 30% of cases. In outcome analysis, blood cultures after discontinuing drug were rarely documented showing low accepted level of 24%. Overall, general measurements for drug indication and monitoring clinical responses were frequently performed, while other measurements for maintaining adequate serum drug levels to prevent toxicity and maximize clinical efficacy and detecting toxicity were infrequently performed.