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합성 염료 수용액에 대한 다공성 Ceramic의 흡착 특성
권이열,윤동준,지형하 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-
소수성으로 처리한 다공성 ceramic의 흡착특성을 연구하고자 합성 염료수용액을 회분식으로 실험하였다. 다공성 ceramic의 양(1,2,3,4,5g) 및 particle size(30∼50, 50∼100, 100∼200mesh), temperature(25,30,40℃) 및 흡착시간(0.5,1,2,3hr)의 변화에 따라 탈색율(decoloring efficiency)을 관찰한 결과, 염기성 염료(methyl violet 2B)가 99.6%로 가장 좋았으며, 직접 염료(congo red)가 95.3%, 각 염료의 혼합용액(acid orange Ⅱ, nylon fast blue R, congo red, dark green 2B, methy, violet 2B, cationic red 7BN의 동일비율 혼합)이 70.5%, 산성 염료 (acid orange Ⅱ)가 62.8%인 순서로 나타났다. 흡착제의 양 및 흡착시간, 온도증가에 비례하였으며, particle size가 작을 수록 증가하였다. 이들 조건중 pH의 영향이 가장 크며, pH가 높을수록 흡착효율이 증가하였다. 다공성 ceramic의 염료 조색단(auxochrome)에 대한 친화성은 술폰산기(-SO₃H)에 비해 아미노기(-NH₂)가 우수한 것으로 나타났다. 전반적인 흡착경향은 염기성염료와 직접염료는 Freundlich 등온흡착식에 적합하게 일치되었으며, 산성염료는 Henry형에, 혼합용액은 Langmuir형과 유사한 상관도를 보였다. 재생이 가능한 장점으로 보아 흡착제로 유용하게 사용할 수 있을 것으로 전망된다. The adsorptive properties of porous ceramics(made of sam-wha ceramic co.) in aqueous dyes solution was performed by batch test. The measured decoloring efficiencies were 99.6% for methyl violet 2B, 95.3% for congo red, 70.5% for mixed dyes, 62.8% for acid orange II under various reaction conditions-amounts of porous ceramic, paricle size, temperature and pH. The decoloring efficiency was severely affected by pH, and increased at higher pH. The adsorption rate improved by enhancing adsorption time, amounts of porous ceramic and temperature, increased as the particle size down. Porous ceramics had an affinity for nitro-radical(-NH₂), but not sulphonic-radical(-SO₃H). It was suggested that the porous ceramics was a useful adsorbent because of regenerable merit.
김천숙,박은정,강규식,김지은,안기량,권진형,유시현,주영철,권순정 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.1
Background: The OR(operating room) should provide an optimum environment that is safe for the patient and the working personnel. The air ventilation system of OR has been studied to decrease the contamination of air. We investigated the flow and contamination of the air in OR at our hospital. Method: Cultures in OR were made and the number of bacteria and fungi were calculated. A two-dimensional model for the cross-section of an operation room is developed for the CFD (computational fluid dynamics) analysis. The characteristics of air flow in the empty operation room and in the occupied operation room are calculated by using a CFD program. Results: The current air ventilation system of our hospital does not deliver the clean air to the operating site efficiently in occupied OR. Conclusions: We suggested a new location of air ventilation system which improves air venting with little increase of the cost of equipment.
요하지통 환자에서 두 개의 캐눌라를 이용한 박동성 고주파 신경근 응고술의 임상 연구
김천숙,배재영,배덕구,강규식,안기량,권진형,김지은,유시현 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1
Dorsal root ganglion(DRG) block by the local anesthetics and steroids which has done classically in low back pain(LBP) patients with radiculopathy has high incidence of recurrence rate and side effects of steroids. Recently a new technique of pulsed radiofrequency thermocoagulation(P-RFTC) was introduced and substituted for it because of the benefits such as relatively low recurrence rate, low risk of nerve injury and comfort during the procedure. We experienced 15 patients who had LBP with radiculopathy and no or little response to epidural steroid injection. When we performed DR ganglionotomy by P- RFTC under the C-arm guide in these patients, we tried to approach the exact DR ganglion using tow cannulas - the one for obtaining patient's subjective symptoms and injection of contrast dye, the other for making a RF lesioning after identifying the impedance of sensory and motor stimulation. In conclusion, DR ganglionotomy by P- RFTC using two cannulas in LBP patients is an easy and safe procedure with satisfactory results.
서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)
김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2
Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.
Do-Hyeong Kwon,Jai-Dong Moon,Won-Ju Park,Won-Yang Kang,Soo-Hyeon Kim,Hyeong-Min Lim,Ji-Sung Ahn,Hong-Jae Chae 대한직업환경의학회 2016 대한직업환경의학회지 Vol.28 No.-
Background: An outbreak of eye diseases occurred among workers at a poultry abattoir in South Korea from December 2012 to June 2013. An epidemiological investigation of the causative agent was conducted. The workers were given a special health examination and workplace environmental monitoring was performed. Workers with ocular symptoms subsequently underwent an ophthalmic examination. Case Presentaion: From a total of 41 workers, 26 (63.4 %) were diagnosed with keratoepitheliopathy by ophthalmic examination. Environmental monitoring of the workplace revealed that the ultraviolet (UV) apron-disinfection lamp had not been turning off at the set times, and so the workers’ faces had been exposed to UV radiation. Effective radiation dose measurement showed a UV-B exposure of 7-30 ㎼/㎠, and a UV-C exposure of 40-200 ㎼/㎠; both values exceed the occupational exposure limits. The outbreak ceased after the lamp was repaired. Conclusions: This case shows that inappropriate use of the UV disinfection lamp can cause mass photokeratitis. In order to prevent this, the UV disinfection lamp must be checked regularly, workers must be educated on the health effects of UV radiation, and appropriate eye protection must be worn.
증례 : 급성 A형 간염 후 발생한 전격성 제1형 당뇨병 1예
권지연 ( Ji Yeon Kwon ),노미오 ( Mi Oh Roh ),송민수 ( Min Soo Song ),정찬희 ( Chan Hee Jung ),박형규 ( Hyeong Kyu Park ),김여주 ( Yeo Ju Kim ),목지오 ( Ji Oh Mok ),김상진 ( Sang Jin Kim ),김철희 ( Chul Hee Kim ),변동원 ( Dong Won 대한당뇨병학회 2009 임상당뇨병 Vol.10 No.2
전격성 제1형 당뇨병은 췌도에서 급격히 베타세포와 알파세포가 파괴되는 특징을 가진 당뇨병으로 그 기전은 명확하지 않으나 유전적 감수성이 있는 개체에서 바이러스 감염 등의 환경적인 인자와의 연관성이 가능한 병태생리로 제시되고 있으며 이에 대한 추가적인 연구가 필요하다. 저자들은 최근 급증하는 A형 간염 후에 발생한 전격성 제1형 당뇨병 1예를 경험하여 전격성 제1형 당뇨병과 바이러스 감염의 관련성에 대한 근거를 제시하고 이에 대해 보고하는 바이다. Fulminant type 1 diabetes mellitus is a novel subtype of type 1 diabetes, which is characterized by a remarkably abrupt onset, metabolic derangement such as diabetic ketoacidosis at diagnosis, low HbA1c level at onset and negative islet-related autoantibodies. The pathogenesis of this disease remains to be clarified, but the involvement of both genetic background and viruses have been suggested. We recently encountered a case of fulminant type 1 diabetes mellitus in 32-year-old male patient who was diagnosed with acute hepatitis A a month ago. Laboratory findings revealed high blood glucose level as well as evidence of diabetic ketoacidosis, but the HbA1c level was normal. The low level of plasma C-peptide indicated the loss of endogenous insulin secretion. This patient`s laboratory results met the criteria for the diagnosis of fulminant type 1 diabetes. We consider that this report can add to the body of evidence of a viral etiology of fulminant type 1 diabetes. Further study is needed to elucidate the exact pathogenesis. (Korean Clinical Diabetes J 10:118-122, 2009)