Benzoate, m-Toluate, Phenol의 Pseudomonas putida에 의한 생분해

김장규,김석형,김태환,이대광,김남기 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

It this study, basic data were obtained for the treatment of industrial waste water which includes aromatic compounds. Substrate concentrations used were 100ppm, 500ppm, and 1,000pprn and initial pH's were pH6, pH7, and pH8 in order to obtain the optimum conditions for treating benzoate, m-toluate, and phenol by Pseudomonas putida(KCTC 1644). Durations were 20hrs for 100ppm, 40hrs for 500ppm, and 60hrs for 1,000ppm before the static growth of Pseudomonas putida. 100% of 100ppm benzoate(0.31g cell/1) was biodegraded at pH6, pH7, and pH8 before 20hrs, 52.8% of 500ppm at pH8 in 40hrs, and 27.9% of 1,000ppm at pH8 in 60hrs. The best initial pH was pH8 for the biodegradation and the growth of Pseudomonas putida in benzoate medium. For m-toluate, the best initial pH was also pH8. At this pH, 40.6% of 10Dppm(0.31 cell/1), 21.9% of 500ppm, and 14.1% of 1,000ppm m-toluate were biodegraded respectively in limited time. But for phenol, the best initial pH was pH7. At this point, 9.8% of 100ppm(0.218 cell/1), 7.1% of 500ppm, and 4.7% of 1,000ppm phenol were biodegraded respectively. Therefore, the best carbon source in this experiment was benzoate. Pseudomonas putida was also able to biodegrade m-cresol, p-hydroxybenzoic acid, and benzaldehyde.

Original Articles : Clinical significance of occult hepatitis B virus infection in chronic hepatitis C patients

( Jae Young Jang ),( Soung Won Jeong ),( Sung Ran Cheon1 ),( Sae Hwan Lee1 ),( Sang Gyune Kim ),( Young Koog Cheon ),( Young Seok Kim1 ),( Young Deok Cho1 ),( Hong Soo Kim ),( So Young Jin ),( Yun Soo 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.3

Background/Aims: We investigated the frequency of occult hepatitis B virus (HBV) infection in anti-hepatitis C virus (HCV)-positive individuals and the effects of occult HBV infection on the severity of liver disease. Methods: Seventy-one hepatitis B virus surface-antigen (HBsAg)-negative patients were divided according to their HBV serological status into groups A (anti-HBc positive, anti-HBs negative; n=18), B (anti-HBc positive, anti-HBs positive; n=34), and C (anti-HBc negative, anti-HBs positive/negative; n=19), and by anti-HCV positivity (anti-HCV positive; n=32 vs. anti-HCV negative; n=39). Liver biopsy samples were taken, and HBV DNA was quantified by real-time PCR. Results: Intrahepatic HBV DNA was detected in 32.4% (23/71) of the entire cohort, and HBV DNA levels were invariably low in the different groups. Occult HBV infection was detected more frequently in the anti-HBc-positive patients. Intrahepatic HBV DNA was detected in 28.1% (9/32) of the anti-HCV-positive and 35.9% (14/39) of the anti-HCV-negative subjects. The HCV genotype did not affect the detection rate of intrahepatic HBV DNA. In anti-HCV-positive cases, occult HBV infection did not affect liver disease severity. Conclusions: Low levels of intrahepatic HBV DNA were detected frequently in both HBsAg-negative and anti-HCV-positive cases. However, the frequency of occult HBV infection was not affected by the presence of hepatitis C, and occult HBV infection did not have a significant effect on the disease severity of hepatitis C. (Korean J Hepatol 2011;17:206-212)

하퇴 의지 사용자의 족저압 분포 특성에 관한 연구

김장환,신헌석 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.3

The purpose of this study was to compare the static pressure, dynamic pressure, dynamic pressure-time integral, relative impulse, and contact time between the sound lower limb and amputated lower limb in trans-tibial amputee subjects using Parotec system. Seventeen trans-tibial amputee subjects wearing endoskeletal trans-tibial prosthesis voluntarily participated in this study. The results were as follows: 1) In static standing condition, there were significantly higher static pressure in sound lower limb insole sensor of 10, 14, 15, 18, 19, 23, and 24 and in amputated lower limb insole sensor of 9, 12, and 16 (p<.05). 2) In dynamic gait condition, there were significantly higher dynamic pressure in sound lower limb insole sensor of 2, 18, 22, 23, and 24 and in amputated lower limb insole sensor of 5, 9, 10, 11, 12, 14, 15, and 16 (p<.05), 3) In dynamic gait condition, there were significantly higher pressure-time integral in sound lower limb insole sensor of 2, 4, 18, 19, 20, 21, 23, and 24 and in amputated lower limb insole sensor of 5, 11, 12, and 15 (p<.05). 4) In dynamic gait condition, there were significantly higher relative impulse in sound lower limb insole sensor of 18, 19, 20, 22, 23, and 24 and in amputated lower limb insole sensor of 5, 9, 10, 11, 12, and 15 (p<.05). 5) In dynamic gait condition, there was significantly higher percentage of contact time in push off phase of sound lower limb and in support phase of amputated lower limb (p<.05). These results suggest that trans-tibial amputee subjects had characteristics of shortened push off phase due to unutilized forefoot and of lengthened support Phase with higher pressure in the midfoot.

새열기형의 임상적 고찰

김장묵,김대식,백승혁,한동렬,김희중,백병준,오천환 순천향의학연구소 2000 Journal of Soonchunhyang Medical Science Vol.6 No.2

Background and Objectives : Branchial cleft anomalies are encountered rarely in clinical practice. We reviewed medical records of branchial cleft anomalies according to age and sex distribution, site distribution, characteristics of mass on physical examination, location of mass, preoperative diagnosis, type of branchial cleft cyst and report our experience with 25 cases of branchial cleft anomalies. Materials and Methods : A review of medical records was performed on 25 cases of branchial cleft anomalies diagnosed in pathologic report from January, 1990 to March, 2000. Result : Sex distribution was 11 male and 14 female, age distribution was most common in third decade which was 8 cases(32%). Site distribution was predominant in left side(13 cases), and in physical examination, the characteristics of the mass was nontender(76%), mobile(60%), soft(80%). The lesion site was submandibular area in 2 cases, upper 1/3 portion of sternocleidomastoid muscle(SCM) in 2 cases, middle 1/3 portion of SCM in 20 cases and parotid area in 1 case. The preoperative diagnosis was branchial cleft cyst in 16 cases, cervical lymphadenitis in 3 cases, tuberculous lymphadenitis in 3 cases, branchial cleft fistula in 1 case, dermoid cyst in 1 case and parotid mass in 1 case. Among 25 cases, first branchial cleft cyst was seen in 4 cases, second branchial cleft cyst in 20 cases and second branchial cleft fistula in 1 case. Conclusion : The clinical history of recurrent neck inflammatory episodes in young patients and nontender, mobile, soft neck mass should raise the suspicion of this entity. Investigation using CT scanning in combination with aspiration is useful. Treatment of all branchial cleft anomalies is complete surgical excision because there is lack of spontaneous regression, a high rate of recurrent infection, the possibility of other diagnosis, and rare malignant degeneration. Complete removal without complications depends on a good understanding of regional embryogenesis, a knowledge of the surrounding structure, and awareness of the different anatomical presentation.

환경보고서의 유용성에 대한 이용자의 인식에 관한 설문조사연구

장지인,김장환,정혜정 대한경영학회 2003 大韓經營學會誌 Vol.16 No.7

This study will develop the way of working out the more useful environmental report based on the result of the survey which was carried out in the companies currently publishing the report(publisher) and stakeholder(report user). At present, the number of domestic company which publishers the environmental report is quite few, however, its number will be expected to reach high in near future in the light of its importance. In the survey of usefulness of those environmental reports, 24 out of 25 report publishers and 18 out of 22 report users answered "useful". However, both of publishers and users pointed out the various points at issue of their points of views when they wrote and used the reports. First of all, the publishers usually make out the environmental reports based on the guideline out of the Ministry of Environment which is official recognized standard to help the publishers the consistency of the report and easiness of making out. However, the publishers also indicate controversial points of impeding the publisher's creativity due to its too much generalization. The users of those environmental reports present the problems of the impossibility of making comparison between entities due to the difficulties of the substance of the report, credibility of its objectivity and confidence, and lack of unified formation of report. The result of this survey is expected to be good reference for the development of the environmental report.

일차적 관동맥 중재술 시 관동맥 조영술상 혈전이 많은 병변에서의 원위부 색전증 방어에 대한 PercuSurge GuardWire 시술의 유용성

김장영,윤정한,이승환,유병수,정현숙,김우재,주헌수,황성오,최경훈 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.12

관동맥 우회로술 중 경식도 심초음파도로 관찰한 도부타민 투여후와 우회로술후의 좌심실 국소벽운동

김희열,김종진,윤호중,유기동,박지원,이길환,노태호,채장성,김재형,홍순조,최규보 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.8

고대 韓民族의 생물 이용과 음양오행론 : BC 8,000년부터 AD 100년경까지 from BC 8000 to AD 100

金玄,申桓浩,宋美長 한국정신과학학회 2001 韓國精神科學學會誌 Vol.5 No.2

Investigation fields of tins study has mainly focused on diversity of bio-organisms and principle of bio-organism utilization practiced by the inhabitants of Far Eastern Asia from BC 8000 to AD 100. The investigation shows that Korean ancestors before 6000 years utilized various bio-organisms similar to modem Koreans. We also learned from the study that utilization of various bio-organism induced anginal principle In their applications. It was confirmed that applications of this principle were practically used by Korean ancestors after BC 4000. Upon review carried out on the food, clothing and shelter with bio-organism application at that time, we could find out that principle of bio-organism utilization was based on theory of the cosmic dual forces and five elements.

손가락 끝 점을 이용한 손 형상 인식

김종민,이웅기,장근실,양환석,허진경,박승규 朝鮮大學校 統計硏究所 2007 統計硏究所論文誌 Vol.9 No.1

최근 사용자 친화형 유저 인터페이스 구현을 위해 인간의 손 형상을 실시간으로 인식하는 연구의 중요성이 부각되고 있다. 그러나 인간의 손은 자유도가 크기 때문에 손 형상을 정확히 인식하기란 매우 어렵고 또한 피부색과 유사한 색을 가지는 복잡한 배경에서는 더욱 곤란하다. 본 논문에서는 별도의 센서를 부착하지 않고 카메라를 사용하여 피부색 정보에 의한 손 형상을 분할한 후 손가락 끝 점을 찾는다. 찾은 손가락 끝 점을 이용하여 방향을 탐지하는 알고리즘에 대해 기술한다. 이 방법은 템플리트 매칭을 이용하여 손가락 끝 점을 탐색한 후 찾은 손가락 끝 점과 손목의 중심을 이용하여 전, 후, 좌, 우 방향을 탐지한다. 제안하는 방법을 이용하여 3D 가상현실 공간에서의 네비게이션(Navigation)에 응용하였으며, 실험결과 전진, 후진 및 좌측, 우측의 방향전환도 매우 좋은 결과를 보였다. 또한 본 논문에서 제안하는 방법은 마우스, 키보드, 조이스틱 등의 조작 없이 전, 후, 좌, 우 방향전환을 사용자가 직관적으로 지시함으로써 보다 자연스러운 인간과 컴퓨터의 상호작용을 제공할 수 있을 것이다.

골프 라운딩 환경이 스포츠 몰입과 경기결과에 미치는 영향

김장환,임대욱,박진기 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The present study analyzed change in golf players' performance and their immersion in sports according to golf rounding environment and change in golf players' performance according to their immersion in sports, with the object of providing basic materials for improving the quality of golf participants' golf activities. The subjects of this study were golfers who had just finished their golf rounding, A total of 250 golfers were selected through random sampling. Data were analyzed statistically through factor analysis, t-test, one-way ANOVA and regression. First, the condition of golf course and fairway and the manner of companions affect the player's psychological expectation in the golf rounding, preference for golf, desire to play golf, and perception on golf. Second, weather, the condition of golf course and fairway, the difficulty of golf course and the manner of companions affect the player's psychologcal expectation in the golf rounding, preference for golf, desire to play golf, perception on golf, information about golf, and interest in golf related imaginary acts. Third, immersion in acts according to the type of golf rounding was higher in competition than in leisure, This suggests that golf players who play golf for competition is more interested in golf acts than those who play for leisure. Fourth, golfers' performance is expected to be higher ft they have a good sleep on the previous night, if the condition of golf course and tee ground is satisfactory, and if they play with well-mannered companions. Fourth, golfers' performance is expected to be higher ft they have a good sleep on the previous night, if the condition of golf course and tee ground is satisfactory, and if they play with well-mannered companions. Fifth, golfers' performance is expected to be higher if they have high psychological expectation in the golf rounding, strong preference for golf, strong desire to play golf, and high immersion in golf competition.