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하치조 신경손상에 따른 하순 및 이부의 지각이상시 적외선 체열검사(DITI)의 진단적 효용
김예원(Yae-Won Kim),김명래(Myung-Rae Kim) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.1
Neurosensory dysfunction of the injured inferior alveolarnerve(IAN) is a common and distrssing consequence of traumatic or iatrogenic injury. Conventional neurosensory testing has been used to detect and monitor sensory impairments of the injured IAN. However, these tests had low reliability and are not qualitative at best because they are based on solely on the patient’s subjective assesment of symptoms. Consequently, there is need for more reliable, sensitive, and objective test measures to document and to monitor sensory dysfunction of the trigeminal nerve. This study was to investigate DITI’s (digital infrared thermographic imaging) potential as a diagnostic alternative for evaluating of the nerve injures and sensory disturbance. Subjects were 30 patients who had been referred to Ewha Medical Center due to sensory disturbance of the lower lip and chin followed after unobserved inferior alveolar nerve injuries. The patients were examined by clinical neurosensory tests as SLTD (static light touch discrimination), MDD (moving direction discrimination), PPN (pin prick nociception) and DITI (digital infrared thermographic imaging). The correlation between clinical sensory dysfunction scores(Sum of SLTD, MDD, PPN, NP, Tinel sign) and DITI were tested by Spearman nonparametric rank correlation anaylsis & Kruskal-Wallis test, Wilcoxon 2-sample test. This study resulted in as follows; ① The difference of thermal difference between normal side and affected side was as Δ-3.2±0.13. ② The DITI differences of the subjects presenting dysesthesia of the lip and chin were correlated significantly with the neurosensory dysfunction scores(r=0.419, p=0.021)and SLTD (r=0.429, p〈0.05). ③ The MDD, PPN, NP, Tinel sign, duration, gender were not correlated with DITI(p〉 0.05). Therefore, the DITI(digital infrared thermographic imaging) can be an option of the useful objective diagnostic methods to evaluate the injured inferior alveolar nerve and sensory dysfunction of trigerminal nerve.
폴리에틸렌이민 전처리와 황화구리 무전해 도금에 의한 전기전도성 면섬유의 제조
김예원(Yae Won Kim),양대혁(Dae Hyuk Yang),김영호(Young Ho Kim) 한국고분자학회 2020 폴리머 Vol.44 No.3
면섬유에 폴리에틸렌이민(PEI)을 처리하여 양이온화시키고, 이를 황산구리와 티오황산나트륨 혼합 용액으로 황화구리 무전해 도금함으로써 전기전도성 면섬유를 제조하였다. PEI 전처리 및 황화구리 도금에 따른 시료들의 표면저항, 마찰대전압, 전자파 차폐효율 변화 등을 분석하였다. 면섬유에 대한 PEI 전처리는 0.5% 이하의 낮은 농도로도 충분하였으며, PEI 전처리된 면직물에 4% 황화구리와 4% 티오황산나트륨 혼합 용액으로 80 °C에서 2시간 동안 황화구리 도금시키면 표면저항이 1~2 Ω/sq 이하인 우수한 전기전도성을 나타내었다. 0.1% PEI 용액으로 전처리한 후 황화구리로 무전해 도금함으로써 0.01 MHz~3 GHz의 주파수 대역에서 35~40 dB의 우수한 전자파 차폐효율을 갖는 전기전도성 면직물을 제조할 수 있었다. A method of preparing electroconductive cotton fabrics by cationization of cotton fibers with polyethyleneimine (PEI) treatment, followed by electroless plating of copper sulfide with a mixed solution of copper sulfate and sodium thiosulfate was studied. The changes in surface resistance, frictional static voltage, and electromagnetic shielding efficiency of samples according to PEI pretreatment and copper sulfide plating were analyzed. PEI pretreatment on cotton fibers was sufficient at low concentrations below 0.5%. Copper sulfide plating on PEI pretreated cotton fabric with 4% copper sulfate and 4% sodium thiosulfate mixed solution at 80 °C for 2 h showed good surface resistance of 1~2 Ω/sq or less. By electroless plating with copper sulfide after pretreatment with 0.1% PEI solution, an electrically conductive cotton fabric having an excellent electromagnetic shielding effect of 35~40 dB in the frequency band of 0.01 MHz to 3 GHz could be prepared.
폴리에틸렌이민 처리에 의한 면섬유의 양이온화 및 황화구리 도금에의 응용
김예원,오필록,김영호,Kim, Yae Won,Oh, Pilrok,Kim, Young Ho 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.3
Cotton fabrics were treated with polyethyleneimine (PEI), in order to cationize cellulose fibers and convert them into electro-conductive fibers by electroless plating of copper sulfide (CuS), using the introduced functional groups. As the PEI concentration increased and the treatment temperature decreased, the add-on (weight increase after treatment) of the PEI-treated fabric increased. However, treatment times of more than 30 minutes did not further affect the add-on. The PEI-treated cotton fabrics could be dyed with an acid dye, confirming that the fabrics were cationized. The apparent dye uptake according to the Mubelka-Munk equation (K/S value) of the dyed samples increased sharply with increasing PEI concentration, reached a maximum at 0.01 %(w/v), and then decreased with further increases in PEI concentration. These results indicate that a PEI concentration as low as 0.01% was sufficient for the cationization of cotton fibers. The PEI-pretreated cotton fabrics were electroless plated with CuS, using solutions containing both $CuSO_4$ and $Na_2S_2O_3$ and the electrical conductivity was compared by measuring the surface resistance. When a 4 % (w/v) $CuSO_4$ and 4 % (w/v) $Na_2S_2O_3$ solution was used for plating at $80^{\circ}C$, the CuS plated samples showed a very low surface resistance of $1-2{\Omega}/sq$. Although the maximum K/S value of the dyed fabric was obtained at 0.01% PEI concentration, the surface resistance of the samples decreased continuously, before reaching an almost constant value at the PEI concentration of 0.5%.