원유의 미생물적 유화

차미선,손홍주,이건,고명선,이상준,이종근 부산대학교 환경문제연구소 1996 環境硏究報 Vol.14 No.1

Microorganisms producing bioemulsifier were isolated from the sea water in Pusan costal aera. The isolated strain which had the highest emulsification activity and stability was identified as the genus Acinetobacter from the results of morphological, cultural and biochemical tests and named Acinetobacter sp. EL-C6 for convinience. The compositions of optimum medium for emulsification of crude oil by Acinetobacter sp. EL-C6 were crude oil 2%, NH_4NO_3 0.2%, K_2HPO_4 0.01%, MgSO_4·7H_2O 1%, CaCl_2·2H_2O 0.1%, NaCl 3% and the initial pH 7.5. The cultivation for emulsification of crude oil was carried out in 500m1 shaking flask containing 100m1 of the optimum medium at 30℃. The highest emulsification was observed after 5 days. The utilization on the various hydrocarbon of the Acinetobacter sp. EL-C6 was showed that the utilization of n-alkane compounds were better than that of aromatic compounds. Among the petroleum compounds, by Acinetobacter sp. EL-06.

두경부 림프종에 대한 방사선과학적 접근: 충북대학교병원에서의 경험

차상훈,김주창,한기석,김성진,박길선,궁성수 충북대학교 의과대학 충북대학교 의학연구소 1999 忠北醫大學術誌 Vol.9 No.2

목적: 충북대학교병원에서 두경부의 림프종으로 진단된 증례들을 방사선학적으로 분석하여 임파절외 병변과 임파절 병변의 특징에 관하여 알아보고 이전의 문헌들과 비교하여 고찰하고자 하였다. 대상 및 방법: 병리학적으로 두경부의 림프종으로 진단된 31명을 대상으로 후향적 분석을 하였다. 조직검사로 확인된 병변 외에 다발성 병변에서는 조직 검사로 확인되지 않았더라도 치료 전 CT나 MRI 상 분명한 경우, 치료 후의 추적 CT 또는 MRI 상 명백한 호전이 있으면 병변으로 간주하였고 특히, 치료 전 림프절의 크기가 1-1.5cm보다 작아도 치료 전·후 분명한 차이를 나타내면 병변으로 간주하였다. 림프절외 병변의 부위, 림프절 병변의 위치와 크기, 전신 림프종 여부, 림프종의 병리학적 진단 등에 관해 분석하였다. 결과: 호지킨 림프종은 1명이고 림프절 병변만이 분명하였다. 나머지 30명은 비호지킨 림프종으로서 그중에는 혼합형 병변이 가장 많았으며(n=20) 림프절 외 병변만 있는 경우가 7명, 림프절 병변만 있는 경우가 3명이었다.림프절 외 병변은 Waldeyer's ring의 다발성 병변이 대부분이었는데 이중 인후부에 별도의 병변이 동반된 경우, lingual tonsil 만 침범된 경우가 각기 1례씩 있었다. 또한 Waldeyer's ring 병변이 mouth floor나 soft palate로 침범하기도 하였다. 비강 림프종이 진단된 7명 중에 최초 진단 시 또는 치료후 경과 추적 시 양측 비강이 침범된 각 1명씩이 있었고 3명에서는 비익과 주변조직으로의 침범이 있었으며 세포유형은 다양하였다.다형성 세망증으로 진단된 병변은 모두 4례로 비강에 2례, Waldeyer's ring 2례 등이었다.림프절 병변은 23명의 환자에서 모두 71개 림프절 군이 진단되었는데 20명은 2개 이상의 림프절군이 양성인 다발성 병변을 가졌고 이 중 36개 림프절 군에서 1cm이하의 림프절 병변이 진단되었다. 림프절과 림프절 외 병변이 동반된 혼합성 림프종(n=20)의 경우 림프절 외 병변과 동측에 림프절 병변이 있는 환자가 7명이고 양측의 림프절 병변은 13명이었으며 반대측에만 림프절 병변이 확인된 것은 없었다. 결론: 본 연구를 통하여 충북대병원에 내원하였던 두경부 림프종 증례들의 방사선학적 특성을 알 수 있었으며 림프절 외 병변과 림프절 병변이 동반된 경우가 많았는데 이는 치료 전후의 비교를 하여 기존의 연구들과 다른 기준을 설정하였기 때문인데 이에 관하여는 추후 별도의 연구가 필요하다고 여겨진다. Purpose: 31 cases were retrospectively assessed to analyse radiological features of nodal and extranodal lesions which were diagnosed at Chungbuk National University Hospital(CNUH) and literature review was focused to the previous Korean reports. Materials and Methods: Other than biopsy-proven lesions, nodal and extranodal lesions showing definite size reduction in the post-treatment CT and MRI were also analysed. Cervical lymph nodes smaller than 1-1.5cm in initial size were included when the treatment caused significant improvement. Case analysis was focused to size and location of the nodal and extranodal lesions, pathological types, presence of the systemic involvement. Results: Only one patient was HD with nodal disease. NHL patients(n=30) had both nodal and extranodal(combined) disease(n=20), extranodal disease only(n=7) and nodal only(n=3). Waldeyer's ring was the most common extranodal location. Among the seven nasal cavity NHLs', both sides were occupied by the tumor initially(n=1) or during the follow-up(n=1) and 3 cases showed the invasion to ala nasi and cheek, and cell types were various. 2 cases of PMR(n=4) involved nasal cavity and other 2 had diseased Waldeyer's ring. 23 patients revealed nodal disease in total of 71 cervical spaces, most of them(20/23) had more than 2 diseased L/N groups. Among 71 L/N groups, 36 showed node size smaller than 1cm initially. NHL patients with combined nodal and extranodal pathology(n=20) had nodal lesions ipsilateral to extranodal disease in 7, bilateral in 13. Conclusion: Combined nodal and extranodal disease was more prevalent in our study than in the previous literatures because the inclusion criteria for the nodal lesion was wider. We could note several differences that should be pursued in further studies.

교차로에서의 좌회전 금지, U-turn, P-turn을 고려한 개선된 Dijkstra Algorithm에 관한 연구

김성수,전영주,차영민 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A

U-turn and P-turn as well as left-turn restriction exist in real traffic network. the optimal route should be selected for considering these using shortest path algorithms. But, the traditional algorithms have some limitations to use for considering there. The objective of this paper is to modify Dijkstra algorithm in order to find the optimal path in real traffic network. The continuous three nodes are used to check turn-restrictions and exclude these from and optimal path. A virtual connection is used to consider U-turn and P-turn

정신분열병 환자의 우울증에서 Paroxetine과 삼환계 항우울제 병용치료

심주철,공보금,박정환,윤영란,신재국,김정익,안동성,김용관,차인준,김영훈 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.4

저자들은 마산동서병원에 입원중인 우울증이 동반된 정신분열증 환자 10명을 대상으로 사용중인 항정신병약물에 paroxetine과 저용량의 삼환계 항우울제를 6주간 병용투여한 후 우울증상에 대한 효과와 치료의 안전성 및 약물상호작용을 알아보았다. Paroxetine은 고정량의 항정신병약물과 삼환계 항우울제에 부가하여 일일 20㎎을 6주간 병용하게 하였으며, 임상상태는 HDRS, HARS, UKU Side Effect Rating Scale등의 평가척도를 사용하여 평가하였다. 또한 약동학적 약물상호작용은 삼환계 항우울제들의 혈장농도를 HPLC로 측정하여 분석하였다. 결과는 다음과 같다. 1) 10명의 전체 대상환자에서의 HDRS 평균점수는 TCA와 paroxetine 병용투여 6주후에 통계적으로 유의하게 감소되었다. 이중 40%의 환자에서는 병용투여 6주후에 HDRS 점수상 50% 이상의 감소를 보여, 일부의 환자들에서는 정신분열병에 동반된 우울증상의 치료에 소량의 삼환계 항우울제와 paroxetine의 병용치료가 효과가 있음을 확인하였다. 2) 두 명의 환자에게서 심각한 약물독성이 발생하였다. 이중 한 명은 삼환계 항우울제의 높은 혈중농도로 인한 항콜린성 위기(anticholinergic crisis) 소견을 보였으며, 다른 한 명은 인지기능 및 의식수준은 명료하였으나 망상과 환각증상이 약화되는 소견을 보였다. 따라서 본 연구에서 시도된 복합적 약물치료의 경우, 삼환계 항우울제의 혈중농도의 측정을 포함한 세심한 임상적 추적이 필요하다고 생각된다. 3) 기저치의 amitriptyline과 그 대사물인 nortriptyline의 농도합. imipramine과 대사물인 desipramine의 농도합은 각각 47.8-226.5ng/㎖. 80.5-395.6ng/㎖였으며 일반적으로 이들 약물들의 단독사용시에 문헌에 보고된 혈중농도를 훨씬 상회하고 있었다. 이는 병용투여된 항정신병 약물 약시 강력한 CYP2D6 효소억제제로서 기저치의 삼환계 항우울제들의 혈장농도를 이미 상당히 증가시켰던 것으로 판단되며, 그러한 결과로 인해 본 연구에서는 paroxetine이 이전의 문헌보고들과는 달리 뚜렷하게 삼환계 항우울제들의 혈장농도를 증가시키지 못하였다. 본 연구는 SSRI와 삼환계 항우울제의 병합 투여가 우울증의 개선 효과를 빠르게 하고, 치료역을 넓히고, 약물상호작용의 결과 paroxetine이 삼환계 항우울제의 혈중농도를 증가시킨다는 기존의 연구결과를 이용하여 정신분열병 우울증상의 치료에 parotextine과 소량의 삼환계 항우울제를 병용하는 방법을 시도해 본 연구이다. 저자들은 이러한 약물치료가 일부의 환자들에게서 효과가 있음을 관찰하였으나, 항정신병약물과 삼환계 항우울제를 병용투여 할 경우는 물론 이에 paroxetine과 같은 선택적 세로토닌 재흡수 억제제를 병용할 경우 복합약물상호작용의 결과로 약물독성의 위험성이 크며 세심한 주의가 필요함을 경험하였다. Depression is well-known to comorbid with several psychiatric disorders. Many schizophrenics also suffer from depression in the course of their illness. Combined therapy of SSRI and tricyclic antidepressants were reported to have benefits in some depressed patients. Paroxetine, a potent CYP2D6 inhibitor, increases the blood levels of tricyclic antidepressant markedly. Using paroxetine, we tried this combined therapy in the treatment of depressive symptoms in 10 chronic schizophrenic inpatients and evaluated its efficacy and drug interactions between paroxetine and tricyclic antidepressants. The following results were obtained : 1) The mean score of Hamilton's Depression Rating Scale(HDRS) was reduced significantly after 6 weeks-trials of this combined therapy for the mild depressive symptoms in 10 chronic schizophrenics. In four patients, 50% or more reductions in the scores of HDRS were noticed at final evaluation. 2) Two among our 10 subjects experienced severe toxic behavioral problems. Anticholinergic crisis with toxic confusion due to high blood levels of tricyclics was found in one patient and the other showed rapid clinical deterioration in his psychotic symptoms such as delusion and hallucination without any consciousness alternation. 3) Baseline plasma levels of tricyclics before adding paroxetine were higher than expected in our chronic schizophrenic subjects maintained with their antipsychotic medications. Several antipsychotics were also known as a potent CYP2D6 inhibitors and to increase the blood levels of tricyclics. Because the blood levels of tricyclics had already increased significantly by the use of antipsychotics, adding paroxetine to antipsychotics and tricyclic antidepressant in our subjects could increase the blood levels of tricyclics not so much as previously reported in the literatures.

가덕도주변 해역 해수의 중금속 함량

노미경,차미선,박근태,손홍주,문두호,이상준 부산대학교 환경문제연구소 2000 環境硏究報 Vol.18 No.-

The quantitative analysis of heavy metals(As, Cd, Cr, Hg, Pb, Cu) in the sea water around Kaduck island was conducted during the period of March, 1998 to September, 1998. The sea water in the four regions was sampled four times and the heavy metals were analyzed. The Heavy metal concentration of the sea water around Kaduck island was As 127.7㎍/ℓ , Cd 49.28㎍/ℓ , Cr 0.462㎍/ℓ, Hg 0.111㎍/ℓ, Pb 1.713㎍/ℓ, Cu 2.716㎍/ℓ in the average value, respectively.

좌각차단을 동반한 심부전증 환자에 실시한 양심실 심박조율기 치료 : 증례 보고

김찬욱,차태준,김성만,김민대,권성일,서수홍,최병주,주승재,이재우 고신대학교 의학부 2002 高神大學校 醫學部 論文集 Vol.17 No.1

Epidemiological studies suggest that 30-50% of patients diagnosed with symptomatic congestive heart failure(CHF) have electrocardiographic evidence of a major intraventricular conduction delay, which may worsen left ventricular systolic and diastolic dysfunction through asynchronous ventricular contraction and paradoxical interventricular septal wall motion. Biventricular pacing is an emerging therapy allowing simultaneous electrical stimulation of the both ventricles with an implantable pacing system and it improves hemodynamics and well-being of patient by reducing ventricular asynchrony. Recently, we underwent biventricular DDD pacemaker implantation in a patient with CHF and Left bundle branch block and was significantly improved exercise tolerance and quality of life in that patient.

피로와 의료이용, 업무상 사고 및 질병결근

장세진,고상백,강동묵,김성아,정진주,이철갑,강명근,현숙정,조정진,차봉석,박종구 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Objectives: This study examined the relationship of fatigue to medical utilization, occupational accident and sickness absence. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project, 2002~2004). A total of 30,146 employees categorized within the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were recruited. A structured-questionnaire was used to assess the participants' sociodemo-graphics, job-related factors, health-related behaviors, personality trait, self=perceived fatigue (MFS) and the frequency of medical utilization, occupational accident and sickness absence. Data on medical utilization and occupational accident were confirmed from company health records. Chi-square test and logistic regression analysis were used to elucidate the relationship of self-perceived fatigue to medical utilization, occupational accident and sickness absence. Results: In logistic regression analyses, self-perceived fatigue was associated with medical utilization (outpatient), occupational accident and sickness absence although the strength of the associations was higher in the blue collar workers except for medical utilization. For medical utilization, the white collar worker's adjusted odds ratios of outpatient utilization for workers scoring in the third quartile and the highest quartile, compared to workers scoring in the lowest quartile were 1.50 (95% CI: 1.20-1.87) and 2.16 (95% CI: 1.69-2.75), respectively. The blue collar workers' adjusted odds ratios of outpatient utilization for workers scoring in the second (OR: 1.23, 95% CI: 1.06-1.43), third (OR: 1.42, 95% CI: 1.22-1.66) and highest quartile (OR:1.83, 95% CI: 1.55-2.17), respectively, compared to workers scoring in the lowest quartile were statistically significant. However, no associations were found between fatigue and inpatient utilization for either the white or blue collar workers. The blue collar workers' adjusted odds ratios of being injured for workers scoring in the second, third and highest quartile were 1.41 (95% CI: 1.00-2.00), 1.57 (95% CI: 1.10-2.22) and 2.41 (95% CI: 1.69-3.44), respectively, compared to those scoring in the lowest quartile, but, those of the white collar workers were not significant. There was more likely to an increased risk of sickness absence in workers scoring in the second, third and highest quartile compared to those scoring in the lowest quartile in both white and blue collar workers, but the magnitudes of risk were higher in the blue collar workers than the white collars workers. Conclusion: This result suggests that fatigue is a determinant predictor of medical utilization, occupational accident and sickness absence, and that the pattern of risks for the three outcomes differs according to the occupational type. Some limitations of this study and considerations for future study were also discussed.

APX-115, a first-in-class pan-NADPH oxidase (Nox) inhibitor, protects db/db mice from renal injury

Cha, Jin Joo,Min, Hye Sook,Kim, Ki Tae,Kim, Jung Eun,Ghee, Jung Yeon,Kim, Hyun Wook,Lee, Ji Eun,Han, Jee Young,Lee, Gayoung,Ha, Hun Joo,Bae, Yun Soo,Lee, Sae Rom,Moon, Sung Hwan,Lee, Sung Chan,Kim, Ga Nature Publishing Group 2017 Laboratory investigation Vol.97 No.4

<P>Recent studies have suggested that renal Nox is important in the progression of diabetic nephropathy. Therefore, we investigated the effect of a novel pan-NOX-inhibitor, APX-115, on diabetic nephropathy in type 2 diabetic mice. Eight-week-old db/m and db/db mice were treated with APX-115 for 12 weeks. APX-115 was administered by oral gavage at a dose of 60 mg/kg per day. To compare the effects of APX-115 with a dual Nox1/Nox4 inhibitor, db/db mice were treated with GKT137831 according to the same protocol. APX-115 significantly improved insulin resistance in diabetic mice, similar to GKT137831. Oxidative stress as measured by plasma 8-isoprostane level was decreased in the APX-115 group compared with diabetic controls. All lipid profiles, both in plasma and tissues improved with Nox inhibition:APX-115 treatment decreased Nox1, Nox2, and Nox4 protein expression in the kidney. APX-115 decreased urinary albumin excretion and preserved creatinine level. In diabetic kidneys, APX-115 significantly improved mesangial expansion, but GKT137831 did not. In addition, F4/80 infiltration in the adipose tissue and kidney decreased with APX-115 treatment. We also found that TGF-beta stimulated ROS generation in primary mouse mesangial cells (pMMCs) from wild-type, Nox1 KO, and Duox1 KO mice, but did not induce Nox activity in pMMCs from Nox2 knockout (KO), Nox4 KO, or Duox2 KO mice. These results indicate that activating Nox2, Nox4, or Duox2 in pMMCs is essential for TGF-beta-mediated ROS generation. Our findings suggest that APX-115 may be as effective or may provide better protection than the dual Nox1/Nox4 inhibitor, and pan-Nox inhibition with APX-115 might be a promising therapy for diabetic nephropathy.</P>

RR Lyrae Stars in the Field of Sagittarius II

Joo, Seok-Joo,Kyeong, Jaemann,Yang, Soung-Chul,Han, Sang-Il,Sung, Eon-Chang,Rey, Soo-Chang,Jerjen, Helmut,Kim, Hak-Sub,Kim, Dongwon,Jeong, Hyunjin,Ree, Chang H.,Cha, Sang-Mok,Lee, Yongseok American Astronomical Society 2019 The Astrophysical journal Vol.875 No.2

RR Lyrae Variables in the Crater II Dwarf Galaxy

Joo, Seok-Joo,Kyeong, Jaemann,Yang, Soung-Chul,Han, Sang-Il,Sung, Eon-Chang,Kim, Dongwon,Jeong, Hyunjin,Ree, Chang H.,Rey, Soo-Chang,Jerjen, Helmut,Kim, Hak-Sub,Cha, Sang-Mok,Lee, Yongseok American Astronomical Society 2018 The Astrophysical journal Vol.861 No.1

<P>We report the detection of RR Lyrae variable stars in Crater. II, a recently discovered large and diffuse satellite dwarf galaxy of the Milky Way (MW). Based on B, V time-series photometry obtained with the Korea Microlensing Telescope Network 1.6 m telescope at Cerro Tololo Inter-American Observatory, we identified 83 ab-type and 13 c-type pulsators by fitting template light curves. The detected RR Lyrae stars are centrally concentrated, which ensures that most of them are members of Crater. II. In terms of the distribution of RRab stars in the period-amplitude diagram, Crater. II is clearly different from ultra-faint dwarf (UFD) galaxies, but very similar to the two classical MW dwarf spheroidal (dSph) galaxies Draco and Carina with Oosterhoff-intermediate (Oo-int) properties. Combined with the mean period of ab-type variables (< P-ab > = 0.631 +/- 0.004 days) and the c-type fraction (similar to 0.14) in Crater. II, this suggests an Oo-int classification for Crater. II and implies that its nature is more like a dSph rather than a UFD. We also estimated the mean metallicity, reddening, and distance of Crater. II, from the photometric and pulsation properties of the RR Lyrae stars. The stellar population model we have constructed indicates that Crater. II is dominated by an old population, but is relatively younger than the oldest globular clusters in the MW. With a lack of high-amplitude short-period RRab stars, Crater. II, like most of the other less massive dSphs, is probably not a surviving counterpart of the major building blocks of the MW halo.</P>