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습식텍스쳐를 이용한 삼결정 실리콘 광학적.전기적 특성 연구
한규민(Han, Kyu-Min),유진수(Yoo, Jin-Su),유권종(Yoo, Kwon-Jong),이희덕(Lee, Hi-Deok),최성진(Choi, Sung-Jin),권준영(Kwon, Jun-Young),김기호(Kim, Ki-Ho),이준신(Yi, Jun-Sin) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
Two different wet etching solutions, NaOH 40% and Acid, were used for etching in tri-crystalline Silicon(Tri-Si) solar cell fabrication. The wafers etched in NaOH40% solution showed higher reflectance compared to the wafers etched in Acid solution after SiN_x deposition. In light current-voltage results, the cells etched in Acid solution exhibited higher short circuit current and open circuit voltage than those of the cells etched in NaOH 40% solution. We have obtained 16.70% conversion efficiency in large area(156cm²) Tri-Si solar cells etched in Acid solution.
Laparoscopic Partial Nephrectomy Using a Water (Hydro)-Jet System: A Case Report
Sin Woo Lee,Hyun Hwan Sung,Hwang Gyun Jeon,Byong Chang Jeong,Seong Soo Jeon,Hyun Moo Lee,Han-Yong Choi,Seong Il Seo 대한비뇨기종양학회 2015 대한비뇨기종양학회지 Vol.13 No.3
The water-jet system (WJS) can be used for selective dissection of kidney parenchyma without renal artery clamping in laparoscopic partial nephrectomy (LPN). We report our experiences regarding LPN with a WJS. The first case was a 59 year old male with a 1.8 cm solid mass in the Rt. mid-lateral area (R.E.N.A.L score: 5a). The second case was a 24 year old female with a 2.3cm solid mass in the Lt. mid-lateral area (R.E.N.A.L score: 7x). We successfully finished non-clamping LPN using a WJS without perioperative complications. Surgical margins were negative (7mm and 1mm for cases 1 and 2, respectively). Post-operative renal function was not decreased significantly. LPN using a WJS is a feasible and safe technique which can be performed for small renal masses without ischemic damage.
( Sung Hee Lim ),( Jong-mu Sun ),( Joohyun Hong ),( Dongryul Oh ),( Yong Chan Ahn ),( Man Ki Chung ),( Han-sin Jeong ),( Young-ik Son ),( Myung-ju Ahn ),( Chung-hwan Baek ),( Keunchil Park ) 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.0
Background/Aims: Clinical trials have not consistently supported the use of induction chemotherapy (IC) for locally advanced head and neck squamous cell cancer. Hypopharynx and base of tongue (BOT) cancer has shown relatively poor survival. We investigated the role of IC in improving outcome over current chemoradiotherapy (CRT) in patients with hypopharynx and BOT cancer. Methods: Treatment-naïve patients with stage III/IV (M0) hypopharynx or BOT cancer were randomly assigned to receive CRT alone (CRT arm: cisplatin 100 mg/m<sup>2</sup> on D1 3-weekly, two times plus radiotherapy 68.4 Gy/30 fractions on weekdays) versus two 21-day cycles of IC with TPF (docetaxel & cisplatin 75 mg/m<sup>2</sup> on D1, and fluorouracil 75 mg/m<sup>2</sup> on D1-4) followed by the same CRT regimen (IC arm). The primary endpoint was progression-free survival (PFS). Results: This study closed early after enrollment of 36 patients (19 in the CRT arm, 17 in the IC arm). After a median follow-up of 47.2 months, there was no significant difference in PFS: the median PFS was 26.8 months for the CRT arm and was not reached for the IC arm (p = 0.13). However, the survival curves were widely separated with a plateau after 3 years, suggesting a potential survival benefit from IC: 3-year PFS rates were 45% and 68%, and 3-year overall survival rates were 56% and 86%, in the CRT and IC arms, respectively. Conclusions: This study failed to demonstrate that induction TPF chemotherapy improves survival in patients with BOT and hypopharynx cancer. However, it suggested a favorable outcome with IC to this population.
Overexpression of PRAT1 protein is closely related to triple-negative breast cancer
Sang Eun Nam,Young-Sin Ko,Kyoung Sik Park,TongYi Jin,Young-Bum Yoo,Jung-Hyun Yang,Wook-Youn Kim,Hye-Seung Han,So-Dug Lim,Seung Eun Lee,Wan-Seop Kim 대한외과학회 2022 Annals of Surgical Treatment and Research(ASRT) Vol.103 No.2
Purpose: Triple-negative breast cancer (TNBC) is an aggressive subtype of breast cancer with a poor prognosis and a lack of targeted therapy. Overexpression of PRAT1 is thought to be associated with this aggressive subtype of cancer. Here, we performed a comprehensive analysis and assessed the association between overexpression of PRAT1 and TNBC. Methods: First, using different web-based bioinformatics platforms (TIMER 2.0, UALCAN, and GEPIA 2), the expression of was assessed. Then, the expression of the PRAT1 protein and hormone receptors and HER2 status were assessed by immunohistochemical analysis. For samples of tumors with equivocal immunoreactivity, we performed silver in situ hybridization of the HER2 gene to determine an accurate HER2 status. Next, we used the R package and bc-GenExMiner 4.8 to analyze the relationship between PRAT1 expression and clinicopathological parameters in breast cancer patients. Finally, we determined the relationship between PRAT1 overexpression and prognosis in patients. Results: The expression of PRAT1 in breast cancer tissues is significantly higher than in normal tissue. PRAT1 expression was significantly related to worse overall survival (P < 0.05) and was correlated with these clinicopathological features: T stage, N stage, age, high histologic grade, estrogen receptor status, progesterone receptor status, Her-2 status, TNBC status, basal-like status, CK5/6 status, and Ki67 status. Conclusion: PRAT1 was overexpressed in breast cancer compared to normal tissue, and it may be involved in the progression of breast cancer malignancy. This study provides suggestive evidence of the prognostic role of PRAT1 in breast cancer and the therapeutic target for TNBC.
P163 : A clinical study on scabies (2009-2013)
( Sin Wook Chun ),( Sang Yoon Lee ),( Hyun Ok Son ),( Suk Young Lee ),( Han Gyu Choi ),( Han Kyoung Cho ),( Byung In Ro ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.2
Background: Scabies is an ectoparasite caused by the mite Sarcoptes scabiei var. hominis. This very contagious dermatologic disease is not rare even today. In Goyang city, there are a lot of nursing home and the elderly. So scabies will not be rare disease and its prevalence could be increasing. Objectives: To evaluate the clinical characteristics of scabies patients and find out etiologic factors in transmission. Methods: We reviewed clinically 377 scabies patients diagnosed by microscopic examination in retrospective manner at the Myongji Hospital (2009-2013). Results: The mean age of the patients was 58.7 (male: 54.7/female: 62.8), and 75% of patients were over 50 years. Scabies was found to be most common in November and December. The suspected routes of transmission is nursing home (38.5%), caregivers (15.4%) and house(13.3%). 67.4% of scabies patients had underlying disease such as hypertension (33.7%), dementia (11.9%) and diabetes mellitus (11.9%). Conclusion: We report this clinical study to evaluate the clinical characteristics of scabies patients and find out etiologic factor in transmission.
Sung-Ryoul Kim,Jae-Woo Kwak,Sung-Ka Lee,Seung-Gon Jung,Man-Seung Han,Bang-Sin Kim,Min-Suk Kook,Hee-Kyun Oh,Hong-Ju Park 대한구강악안면외과학회 2012 대한구강악안면외과학회지 Vol.38 No.1
Introduction: This study was conducted to evaluate ssrA expression resulting from adaptation of Escherichia coli (E. coli) to oral pathogens through signal exchange. Materials and Methods: Human cell lines Hep2 and HT29, wild-type E. coli (WT K-12), ssrA knock-out E. coli (Δ K-12), and Scleropages aureus (S. aureus) were used. A single culture consisting of Hep2, HT29, WT K-12, and Δ K-12, and mixed cultures consisting of Hep2 and WT K-12, Hep2 and Δ K-12, WT K-12 and S. aureus, Δ K-12 and S. aureus, and Hep2, WT K-12, and S. aureus were prepared. For HT29, a mixed culture was prepared with WT K-12 and with WT K-12 and S. aureus. Total RNA was extracted from each culture with the resulting expression of ssrA, nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), and p53 was evaluated by Reverse transcription polymerase chain reaction (RT-PCR). Results: The expression of ssrA in a single culture of WT K-12 was lower than that observed in the mixed culture of WT K-12 with S. aureus. Greater ssrA expression was observed in the mixed culture of WT K-12 with Hep2 than in the single culture of WT K-12. The expression of NF-κB was higher in the mixed culture of Hep2 with Δ K-12 than that in the mixed culture of Hep2 with WT K-12, and was lowest in the single culture of Hep2. The expression of ssrA was higher in the mixed culture of WT K-12 with Hep2 and S. aureus than in the mixed culture of WT K-12 with Hep2. Conclusion: These results suggest that ssrA plays an important role in the mechanism of E. coli adaptation to a new environment.
Characteristics of minute T1 colorectal cancer in relevance to pathology and treatment
Sin Hye Park,Seon Ok Oh,Sung Sil Park,Seung Jae Roh,Kyung Su Han,Bun Kim,Chang Won Hong,Byung Chang Kim,Dae Kyung Sohn,Hee Jin Chang,Sung Chan Park,Jae Hwan Oh 대한외과학회 2020 Annals of Surgical Treatment and Research(ASRT) Vol.98 No.4
Purpose: Minute T1 colorectal cancer (CRC) lesions (≤5 mm) are rare; however, little is known about their characteristics and aggressiveness. In this study, we evaluated the characteristics of minute T1 CRC in relevance to pathology and treatment. Methods: This retrospective study included 849 patients with T1 CRC endoscopically or surgically treated between January 2001 and December 2016. The patients were stratified into 4 groups according to tumor size; minute group (≤5 mm), small group (6–10 mm), medium group (11–20 mm), and large group (≥21 mm). Clinicopathological variables were evaluated with respect to tumor size. Results: The incidence of the minute T1 CRC was 2.4% (20 of 849). Minute T1 CRC was significantly associated with flat type (minute, 25%; small, 12.6%; medium, 8.8%; large, 12.6%; P = 0.016), right-sided cancer (30%, 15.4%, 15.4%, 15.1%, P = 0.002) and the absence of background adenoma (BGA) (50%, 40.7%, 32.8%, 18.1%, P < 0.001). In patients who underwent surgery, lymph node metastasis (LNM) was significantly higher in the minute group (36.4%, 15.9%, 15.7%, 9.2%, P = 0.029). Conclusion: Minute T1 CRC is significantly associated with flat type, right-sided cancers, as well as with the absence of BGA and LNM. These results suggested the minute T1 CRC lesions are often aggressive and are likely to be missed during colonoscopy.