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이승범,장익,현도윤,이정로,김성훈,유은애,이수경,조규택,이경준,Lee, Seungbum,Jang, Ik,Hyun, Do Yoon,Lee, Jung-Ro,Kim, Seong-Hoon,Yoo, Eunae,Lee, Sookyeong,Cho, Gyu-Taek,Lee, Kyung Jun 한국작물학회 2020 한국작물학회지 Vol.65 No.4
Melon (Cucumis melo L.), one of the most important fruit crop species, is cultivated worldwide. In this study, a total of 206 melon accessions conserved at the National Agrobiodiversity Center (NAC) in RDA were characterized for nine morphological characteristics according to the NAC descriptor list. In addition, to confirm the genetic composition of each melon accession, genetic profiling was performed using 20 SSR markers. Among the 206 melon accessions, 159 (77.2%) were collected from Asia. The color of fruit flesh and skin were mostly 'white' (56.0%) and 'green' (49%), respectively. Days to female flowering (FD) and maturity (MD) of the accessions ranged from 58 to 72 and 17 to 63, respectively. The fruit length and width of the accessions ranged from 6.0 to 29.3 and 3.6 to 17.2 cm, respectively. The sugar content (SU) ranged from 2.5% to 13.2% with an average of 7.0%. In correlation analysis, SU showed positive and negative correlations with MD and FD, respectively. The accessions were classified into four clusters by cluster analysis. From the results of genetic profiling using 20 SSR markers, three accessions (K189118, K100486, and K190292) were expected to be inbred lines among 206 melon accessions. These results could expand the knowledge of the melon germplasm, providing valuable material for the development of new melon varieties to suit consumer tastes.
진행성 위암에서 종양 연관성 대식세포, 비만세포, 가지세포의 침윤과 임상-병리학적 인자와의 연관성
이승범,지경천,Lee, Seung-Bum,Chi, Kyong-Chon 대한위암학회 2005 대한위암학회지 Vol.5 No.3
목적: 신생혈관형성은 암의 증식, 침습, 전이에 있어 중요한 과정이며 위선암에서 대식세포, 비만세포는 혈관내피세포성장인자를 통한 신생혈관형성 작용을 보이고 가지세포는 혈관내피세포성장인자에 의해 기능이 억제된다. 이들 세포의 조직 침습이 조직병리 및 임상예후와 어떤 상관관계를 가지는지 알아보고자 한다. 대상 및 방법: 1999년 1월부터 2002년 12월까지 진행성 위암으로 위절제술을 받은 환자 중 79명을 대상으로 하여 파라핀 포매 조직을 이용하여 대식세포, 비만세포, 가지세포 및 미세혈관에 대한 면역조직화학 염색을 실시하고, 이들의 발현과 임상병기 및 생존율에 대한 분석을 실시하였다. 결과: 대식세포의 수는 분화도가 낮을수록, 조직침습이 깊을수록, 림프절전이가 많을수록 유의하게 감소하였으나(P<0.05), 미세혈관 밀도 및 생존기간의 차이는 보이지 않았다. 비만세포와 가지세포의 침윤정도는 조직병리 및 생존율과의 연관성을 보이지 않았다. 결론: 종양연관성 대식세포가 위암환자에 있어 예후인자로 가치를 가질 수 있을 것 인지와 대식세포의 침습부위에 따른 임상적 관련성에 대해 좀 더 세부적인 연구가 필요할 것으로 사료된다. Purpose: Angiogenesis has a critical role in tumor proliferation, invasion, and metastasis. In gastric cancer, tumor-associated macrophages and mast cells produce angiogenic factors such as VEGF, that inhibit the functional maturation of dendritic cells. The aim of this study is to identify tumor-associated macrophages, mast cells, dendritic cell infiltrations, and microvessel densities (MVD) to investigate the relationship between them and the prognosis for gastric-cancer patients. Materials and Methods: The subjects were 79 patients selected from those who had undergone a curative gastric resection for stomach cancer. With them, Immune-histochemical staining was done using CD34 for the MVD, CD68 antigen for macrophages, and S-100 protein for dendritic cells, and toluidine blue staining was done for mast cells. Results: Macrophage infiltration showed a statistically significant positive correlation with histologic differentiation and a negative correlation with invasion depth, nodal metastasis, and stage. S-100 (+) dendritic cells and mast cells had no significant correlations with histologic differentiation, invasion depth, nodal metastasis, distant metastasis, stage, and MVD. As survival, no statistically significant differences were seen between the variables. Conclusion: Tumor-associated macrophages should be evaluated as possible prognostic markers in gastric-cancer patients.
휘발유 유기용제가 흡착된 흡착제의 초임계 이산화탄소를 이용한 재생특성
이승범,성대형,홍인권 ( Seung Bum Lee,Dae Hyung Seong,In Kwon Hong ) 한국공업화학회 1997 공업화학 Vol.8 No.5
휘발성 유기용제의 주된 제거방법은 흡착제를 이용한 흡착 공정이 추천된다. 본 연구에서는 입상활성탄과 활성탄소섬유에 휘발성 유기용제를 흡착시킨 후 폐흡착제를 탈착컬럼에 넣고 318.15K의 온도에서 압력을 변수(2000∼3000psi)로 하는 초임계 이산화탄소를 이용하여 재생하였다. 초임계 이산화탄소의 압력이 증가함에 따라 탈착율과 요오드 흡착가는 증가하였으며, 재생시간은 MEK와 benzene의 경우 각각 70분과 60분이었다. 최대 탈착율은 3000psi의 압력에서 MEK가 흡착된 입상활성탄과 활성탄소섬유의 경우 각각 초기 흡착량의 64.0%, 55.3%가 탈착되었으며, 벤젠이 흡착된 입상활성탄과 활성탄소섬유의 경우에는 각각 59.1%, 45.2%가 탈착되었다. 또한 Tan과 Liou의 모델로 출구농도를 예측할 수 있었다. 따라서 입상활성탄뿐만 아니라 활성탄소섬유의 재생공정에도 초임계유체 재생법의 적용 가능성을 확인할 수있었다. The typical removal method of volatile organic compounds is adsorption process. In this study, granular activated carbon and activated carbon fiber were used as adsorbents, and the adsorption behavior for the two types of adsorbent was compared. And they were regenerated by supercritical carbon dioxide extraction at a constant temperature, 318.15K, and 2000, 2500, 3000 psi respectively. The desorption percentage of initial adsorbates and iodine values were increased with pressure of supercritical carbon dioxide. The regeneration time was 70 and 60 minutes in adsorbents loaded with methyl ethyl ketone(MEK) and benzene, respectively. The desorption percentages were 64.0% for granular activated carbon and 55.3% for activated carbon fiber loaded with MEK, and 59.1% for granular activated carbon and 45.2% for activated carbon fiber loaded with benzene. The exit concentration could be evaluated by Tan and Liou model. Therefore, the granular activated carbon and the activated carbon fiber could be regenerated by supercritical fluid extraction process.
초임계 이산화탄소를 이용한 다공성 Silicone Rubber 의 제조
이승범,김형진,홍인권 ( Seung Bum Lee,Hyung Jin Kim,In Kwon Hong ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.4
Since supercritical fluid has the benefit that slight changes in the temperature and pressure in the critical region cause extremely large change in the solvent density and thus its dissolving power, its application has been enlarged. In this study, calcium carbonate(CaCO₃) particles impregnated in silicone rubber network were extracted by using supercritical carbon dioxide and pore distribution of silicone tubber-CaCO₃ was investigated with varying amount of extract. Silicone rubber has excellent mechanical properties such as heat-resistance, cold-resistance. Silicone rubber-CaCO₃ composite sheets were prepared by kneading processes. And then CaCO₃ particles become dispersed and impregnated in silicone rubber network. Supercritical carbon dioxide diffuse through composite sample, then sample is swollen. CaCO₃ in silicone rubber network is dissolved in supercritical carbon dioxide, and its sites become pores. Pore distribution and pore shape are observed by SEM(scanning electron microscope). Porous silicone rubber is suited for uses such as chromatographic devices, catalytic membranes, and adsorbents of organics.
백내장수술 후 발생한 안내염환자에서 최종시력과 연관된 여러 인자
이승범,한정원,정성근,백남호.Seung-Bum Lee. M.D.. Jung-Won Han. M.D.. Sung-Kun Chung. M.D.. Nam-Ho Baek. M.D. 대한안과학회 2005 대한안과학회지 Vol.46 No.10
Purpose: The most serious complication related to cataract surgery is endophthalmitis. Although its incidence is decreasing, it remains the great threat to the outcome of visual acuity in patients who received cataract surgery. Methods: Retrospective analysis was performed on 18 patients who were diagnosed with endophthalmitis. The following factors were investigated: method of cataract extraction, performance of anterior vitrectomy, presence of posterior capsule rupture, results of bacterial culture, existence of systemic disease, and the duration of time from initial cataract surgery to diagnosis of endophthalmitis and then to subsequent posterior vitrectomy. In addition, the differences in final visual acuity due to variations in these factors were analyzed. Results: Patients who were diagnosed with endophthalmitis and had been commenced on systemic antibiotics within a week of the cataract operation, showed better outcomes in final visual acuity (P=0.043). Conclusion: Occurrence of endophthalmitis and subsequent usage of systemic antibiotics within a one-week time frame of cataract surgery, led to statistically significant improvement in final visual acuity compared to cases in which these events occurred one week later.
이승범,김진형,주천기,Seung-Bum Lee,Jin-Hyoung Kim,Choun-Ki Joo 대한안과학회 2005 대한안과학회지 Vol.46 No.10
Purpose: To evaluate the reproducibility of the flap thickness in LASIK using Moria M2 microkeratome and to examine the safety and the complication rate intraoperatively and postoperatively. Methods: 92-Ninety-two consecutive eyes of 50 patients that received LASIK using the Moria M2 microkeratome were reviewed. The mean of the predictable corneal flap thickness was compared with the mean of the created corneal flap thickness, and intraoperative and postoperative complication and safety were evaluated. Results: The average corneal flap thicknesses were 140±15.16 μm with 130 μm head and 108.01±16.72 μm with 110 μm head. There was no statistically significant correlation between the predictable corneal flap thickness and the created corneal flap thickness with the 130 μm head (p=0.001, one-sample t-test), but there was a stastistically significant correlation with the 110 μm head (p=0.573, one-sample t-test). Conclusions: The M2 Moria microkeratome created a desirable thickness with the 110 μm head, and we can expect postoperative stability of the remaining corneal thickness. The complication rate both intraoperatively and postoperatively was very low.