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김병권,백운이,박진웅,김시오,홍정길 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.1
Spinal anesthesia employing 0.5% plain bupivacaine was administered to 40 patients scheduled for lower limb or perineum surgery at kyungpook National University Hospital. Two different volumes(3 and 4 ml) and 2 different injection sites (lumbar interspaces L2/3 and L3/4) were used and their effects were compared. The patients were divided into four groups of 10; group A received 3 ml of bupivacaine at L3/4, group B 3ml at L2/3, group C 4 ml at L3/4 and group D 4 ml at L2/3. The results were as follows. No significant differenct were found between the 4 groups of patients in relation to age, height, weight and length of surgery. The time for maximal sensory spread was 18.0±7.15 and 18.5±7.84 minutes in groups B, and C(p<0.05) and 20.0±7.84 minutes in group D(p<0.01) which showed a significant increase compared with 11.0±5.6 minutes in group A. Singificant differences(p<0.05) in maximal sensory spread levels were observed between groups A, B(T_9) and group C, D(T_7) No significant differences were found among the four groups in relation to the time of maximal motor blockade. Complete motor block was observed in all groups 20 minutes after spinal injection. Changes in blood pressure and pulse rate showed a significant(p<0.05) decrease in 10∼15 minutes, and a very significant(p<0.01) decrease 20∼30 minutes after spinal injection. Four patients experienced hypotension or bradycardia and two patients developed nausea or vomiting, but none of the patients developed a postspinal headache or micturition difficulty.
Application of ionic liquids for metal dissolution and extraction
김병권,이의주,강예지,이재준 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
This review summarizes the results of studies on the selective dissolution and extraction of Fe, Cr, Cu, and Zn by ionic liquids, as an alternative to the use of conventional molten salts or pickling agents, for various types of steel. Ionic liquids are classified according to the metals, metal ions, and metal oxides by which they can be extracted or dissolved. The results of the metal extraction efficiency per unit time presented in the literature are summarized in a simple unified graphic format. This provides a comparative understanding of the most efficient ionic liquid for the extraction of specific metals.
김병권,배우용,고태경,서지원,홍영습,김유미 대한이비인후과학회 2015 대한이비인후과학회지 두경부외과학 Vol.58 No.6
Background and Objectives There are no reported studies of olfactory function of Korean children, and the existing tests of olfactory function for Korean adults may not be suitable for very young children. This study assessed the applicability of the Butanol Threshold Test (BTT) and Cross-Cultural Smell Identification Test (CC-SIT) to children. Subjects and Method A total of 79 children were included in the study: they were between 6-12 years of age, and had visited University Hospital Health Care Center between January 2012 and December 2013. All children were administered the BTT and CC-SIT. Results Using BTT, 69.62% of the sample was classified as moderate hyposmia. On the other hand, when CC-SIT was used, 45.57% of the sample was classified as moderate and 43.04% as mild hyposmia. CC-SIT and BTT scores were not correlated. Although gender and age were not taken into account in the test results, the CC-SIT could measure age-specific olfactory development. Conclusion Our study provides fundamental data on the clinical use of the CC-SIT and BTT in healthy Korean children. Korean J Otorhinolaryngol-Head Neck Surg 2015;58(6):402-6