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Sung-Suk Lee,Su-Gwan Kim,Seong-Yong Moon,Ji-Su Oh,Jae-Seek You 대한구강악안면외과학회 2014 대한구강악안면외과학회지 Vol.40 No.2
The posttraumatic complications of jaw fractures related to jaw function and facial deformity include nonunion, malunion, malocclusion, temporomandibular joint dysfunction and facial asymmetry. This report presents cases referred to our department for revision of malunion and malocclusion following inadequate reduction of jaw fractures. Three patients with posttraumatic malocclusions caused by malunion were treated with a LeFort I osteotomy in one case and re-fracture in two cases. All of the patients exhibited stable results without further complications (e.g., malunion or malocclusion). Accurate preoperative diagnosis and proper anatomical reduction of the fracture segments are essential to preventing post-surgical malunion and malocclusion.
Lee, Sang-Mok,Kim, Jae-Young,Lee, Han-Jin,Chang, Moon-Ik,Chae, Young-Sik,Rhee, Gyu-Seek The Korean Society for Applied Biological Chemistr 2014 Applied Biological Chemistry (Appl Biol Chem) Vol.57 No.1
Improvement of an analytical method on 6-benzylaminopurine (BAP), a plant growth regulator, and a first-generation synthetic cytokinin for agricultural commodities was undertaken. Analytical method for BAP in the agricultural commodities by gas chromatography in cooperation with nitrogen-phosphorous detector (NPD) was adopted. BAP was extracted with acetone in all samples followed by the ion-associated partitioning method. Vapor pressure of BAP was increased by N-methylation with iodide methane [BAP${\rightarrow}$6-Benzylamino-N-methylpurine (BAMP)]. Finally, N-methylated BAMP was separated with ethylacetate. The quantitation was done by GC using Nitrogen Phosphorous Detector with DB-608, a moderate polarity column under the temperature-rising condition. The standard calibration curve presented the linearity of correlation coefficient ($r^2$)>0.9999, analyzed from 0.2 to 4mg/kg. The limit of quantitation in agricultural commodities showed 0.05 mg/kg. The average recoveries of intra- and inter-day experiments ranged from 70.4 to 103.5% and 70.3 to 105.6%, respectively. The repeatability and reproducibility for intra- and inter-day measurements expressed as a relative standard deviation (RSD) was less than 10.7 and 8.3%, respectively. Therefore, our newly established analytical method for BAP residue in agricultural commodities was applicable to the nation-wide pesticide residues monitoring program with the acceptable level of sensitivity, repeatability and reproducibility.
단파(HF)대역 RFID 리더안테나에 의한 인체유도전류의 등가 안테나 모형 연구
문상곤(Sang-Gon Moon),강원준(Won-June Kang),이종건(Jong-Gun Lee),변진규(Jin-Kyu Byun),최형도(Hyung-Do Choi),천창율(Chang-yul Cheon),이병제(Byungje Lee),정용식(Young-Seek Chung) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
전자파가 인체에 미치는 영향에 대한 연구중 SAR(Specific Absorption Ratio)에 관한연구는 매우 활발하게 이루어지고 있으나 단파 (High Frequency)대역에 의한 인체유도전류에 대한 연구는 미흡한 편이다. 본 연구에서는 근거리장에서 단파대역 RFID 리더 안테나에 의한 인체에 유도되는 전류를 측정하고 이를 등가화 할 수 있는 수직교차루프 형태의 인체등가 모형을 제시하여 인체의 유도전류량과 비교하였다.