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응급실에 내원한 안면부 열상환자에게서 흉터를 최소화하기 위한 방법으로 적용한W-성형술의 효용성: 단기 추적관찰 결과
인용남,박정수,김훈,이석우,강준호,이지한,민진홍 대한응급의학회 2015 대한응급의학회지 Vol.26 No.4
Purpose: Facial scars are a main complaint of patients who had undergone suture in the emergency department. Therefore, effective techniques for minimizing scar formation are required. W-plasty, a widely used method of scar correction, has been performed to change the scar direction or divide it into multiple segmented scars. This method can be applied in the initial stage of wound repair in the emergency department. The aim of this study was to investigate the effectiveness of direct application of W-plasty to the wound in simultaneously accomplishing the aforementioned objectives. Methods: This was a prospective study, from June 2012 to June 2014. Either simple debridement or W-plasty for facial laceration was performed in 31 patients. In patients in the simple debridement group, the excision was made along the laceration margin. In patients in the W-plasty group, the excision was made within the W-form predesigned margin of the laceration. The prognosis was evaluated using the Stony Brook scar evaluation scale (SBSES). Results: Among 31 patients, 15 underwent simple debridement and 16 underwent W-plasty. In procedure time, there was no significant difference between the two groups. No complications were observed in either group. The median SBSES score was 4 (IQR, 3-4) in the simple debridement group and 5 (IQR, 5-5) in the W-plasty group, indicating a significant difference between the two groups (p<0.001). Conclusion: We achieved good results of direct W-plasty application to wound lacerations in terms of minimal scar formation. Thus, for patients with facial lacerations, we suggest that application of W-plasty to the wound debridement is more effective than the classic simple debridement.
나노유체의 임계열유속 및 비등특성에 미치는 나노입자 크기의 영향
조병남(Byeongnam Jo),강준원(Junone Kang),유재석(Jaisuk Yoo),김현정(Hyun-jung Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
The characteristics of boiling heat transfer and critical heat flux (CHF) behavior of nano-fluids were studied by using various sized silver and alumina nanoparticles. The diameter of nanoparticles was from 2 ㎚ to 250 ㎚ for silver and from 20㎚ to 40㎚ for alumina. Pool boiling characteristics and CHF enhancement of nano-fluids with different sized nanoparticles were compared with those of pure water and each nano-fluids. The experiment was performed at atmospheric pressure and the temperature of the pool was maintained constantly by using a flat immersed heater. The concentration of nano-fluids was uniform in all experiments as 0.01g/liter. The results showed that the measured boiling curves were shifted to the right. It demonstrated that the occurrence of nucleate boiling regime in nano-fluids retarded, compared with that of pure water. Also, in nano-fluids, the boiling curves showed that CHF of nano-fluids is significantly enhanced and represented the effect of particle size on boiling characteristics.
OH radical Monitoring Technologies for AOP(Advanced Oxidation Process)
Nam, Seong-Nam,Hwang, Tae-Mun,Kang, Joon-Gu,Han, Sang-Kuk,Kang, Joon-Wun 영남대학교 환경문제연구소 2000 環境硏究 Vol.20 No.1
This study has been conducted to investigate OH radical monitoring technologies far AOP (Advanced Oxidation Process). OH radicals can be measured directly or indirectly through EPR, Hydrogen peroxide method and probe compound such as pCBA which are well known as radical monitoring techniques. Among the various AOPs, we focused on the applicability of EPR technique for OH radical monitoring in Ultrasonic irradiation process. EPR method which is a valuable tool and has a high sensitivity far radical measuring. Our study was performed with 20 kHz ultrasonic processor in 20 ml DMPO (80 mM) solution. EPR spectrum in our experiment has peak height ratio of 1:2:2:1 and hyperfine constants aN = aN = 1.49 mT and g-value 2.0054.
불화수소산 노출 환자에서 동맥 내 글루콘 산 칼슘 주입 치료 후 조직 손상의 정도와 임상지표 간의 비교 분석
이지한,인용남,강준호,한규홍,민진홍,박정수,김훈,이석우 대한응급의학회 2014 대한응급의학회지 Vol.25 No.3
Purpose: Hydrofluoric acid (HFA) causes injury via tissuepenetration by the free fluoride ion. Methods for treatmentof HFA burns include continuous intra-arterial infusion ofcalcium gluconate, which is especially useful for patientswith dermal burns of the digits caused by HFA. However,no comparative study of tissue injury grade with clinical factorsamong patients with HFA burns treated with continuousintra-arterial infusion of calcium gluconate has been conductedin Korea. Methods: We conducted a prospective study at the emergencydepartment of a university teaching hospital betweenJanuary 2011 and June 2013. The subjects enrolled in thisstudy consisted of 33 patients with HFA burns. After completionof treatment, we divided the patients into threegroups according to the type of skin lesions. Patients requiringa skin graft or surgical flap were included in the pooroutcome group, those who had to undergo incision anddrainage in the moderate outcome group, and those whodid not require further treatment in the good outcome group. Results: After completion of all treatments, 22 of the 33patients were included in the good outcome group andseven in the moderate outcome group; the remaining fourpatients were included in the poor outcome group, as theymet the above-mentioned criteria, experienced longer-lastingpain, and were more frequently treated with injection incomparison with the other patients. Conclusion: Patients with HFA burns with long-term painwho need frequent arterial injections despite undergoingintra-arterial calcium gluconate treatment are likely to havepoor outcome; therefore, they require more proactive interventions.
월악산화강암(月岳山花崗岩)의 접촉변성(接觸變成)에 관(關)하여
이대성,강준남,Lee, Dai Sung,Kang, Jun Nam 대한자원환경지질학회 1978 자원환경지질 Vol.11 No.4
The Weolagsan area consists of four units; (1) Low grade meta-sediments of the upper members of Ogcheon age unknown group such as Changri (mainly black slate and phyllitic rock), Majeonri (mainly alternation of slate, limestone and chert) and Hwanggangri Formation (pebble bearing phyllitic sediments); (2) Samtaesan Formation of Chosun System of Ordovician; (3) So called meta-volcanics and (4) Weolagsan Granite and its associations which intruded above mentioned meta-sediments and meta-volcanics. This study was focused to know the Woelagsan granite and its metasomatic effects to the country rocks petrographically and petrochemically. According to the field survey, microscopic work and some chemical analysis, the granite is a "normal granite" based on the Streckeisen's classification and belongs to a mass of the Central-zone younger group in Ogcheon geosynclinal belt. The granite metasomatized the country rocks along its northern contact zone. Zone of calcareous and cherty rocks (Majeonri formation) was silicified partly and skarned locally at the contact with the granite. The chemical analysis of the zone show no difinite variations in contents of $SiO_2$ and CaO with the distance from the granite. It seems to be indicated that the silicification of this part was not so metasomatized by the granite body, but thermally affected as much as to be partially remelted in the specific parts of the formations. Meta-volcanic rock zone was slightly chloritized near contact with the granite. Limestone of Samtaesan Formation was silicified and skarned along the contact zone by the granite body. The chemical analysis of the zone show some noticiable changes in compositions of $SiO_2$ and CaO with distance from the granite boundary. It can be imagined that the silicification of this zone was metasomatically originated by Woelagsan Granite. According to chemical analysis on several trace elements, the ratio of Zn/Cr and Ni/Cr are relatively higher than that of Cu/Cr in the above mentioned silicified zones. Generally the variation of these metal elements in the zones tend to be regular with distance from the granite body.