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치과용 임플란트 적용을 위한 항균력을 가진 티타늄 표면의 평가
강민경 ( Min Kyung Kang ),문승균 ( Seung Kyun Moon ),김경남 ( Kyoung Nam Kim ) 한국치위생과학회 2011 치위생과학회지 Vol.11 No.5
The aim of this study was to evaluate antibacterial effect of Cl coated titanium. To coat the Cl on the titanium, first, the titanium was modified by blasting treatment with hydroxyapatite and alumina powder. Anodization process was completed using electrolyte solution of 0.04 M β-glycerol phosphate disodium salt n-hydrate, 0.4 M calcium acetate n-hydrate and 1 M NaCl on the condition of 250 voltages for 3 min. Surface morphology and elements` observation were performed with scanning electron microscopy and energy dispersive spectroscopy and surface profiler was used to analyze the surface roughness. Antibacterial effect was evaluated by film adhesion method. The anodized titanium after blasting showed dimpled surface contained the Cl. Surface average roughness of these surfaces had significantly higher compared to polished titanium. Result of antibacterial test showed that anodized titanium after blasting had an enhanced antibacterial effect compared to the polished titanium. Therefore, these results suggested that titanium contained Cl by anodization after blasting had a rough surface as well as antibacterial effect.
강민경,이명예,홍경표,유선균,장경호,Kang Min-Kyoung,Lee Myung-Ye,Hong Kyung-Pyo,Yoo Sun-Kyun,Chang Kyung-Ho 동아시아식생활학회 2005 동아시아식생활학회지 Vol.15 No.6
The purpose of this study was to evaluate the selective marinates, red win, ginger, ginseng, and green tea, for improving the sensory characteristics of pork hind legs. The marinated samples of pork hind legs were analyzed for their physicochemical propenies and sensory characteristics. Especially, overall acceptabilities of them were compared with bacon the most palatable pork meat to Koreans. After marinating, all the meats except the red wine marinated meat showed pH increase. After cooking, all the marinated meat including red wine marinated meat recorded further pH increase. The water holding capacities(WHC's) of the marinated meats except the ginger one showed a tendency of decrease. however, who's or all the cooked meats were increased greatly. Only the L-value or the green tea marinated meat increased After cooking, the L-values of the red wine and ginseng marinated meats were lower than that of the unheated cooked meat The a-value of the green tea marinated meat recorded the lowest In the hardness and gumminess test all the marinate treatments showed lower values than the control did. the brittleness of all the marinated meats except the ginger one decreased The flavor of the cooked ginger marinated meat was improved to the similar level of bacon. The textures of all the treatments except the green tea marinated meat were improved the overall acceptability of the ginger or ginseng marinated meat improved greatly to $87.6\%$ of bacon$(100\%)$.
대장 종양의 진단에서 F18-FDG PET/CT의 유용성
강민경 ( Min Kyung Kang ),홍성표 ( Sung Pyo Hong ),이지은 ( Ji Eun Lee ),전태주 ( Tae Joo Jeon ),김종우 ( Jong Woo Kim ),권창일 ( Chang Il Kwon ),고광현 ( Kwang Hyun Ko ),황성규 ( Seong Gyu Hwang ),박필원 ( Pil Won Park ),임규성 ( 대한장연구학회 2010 Intestinal Research Vol.8 No.1
Background/Aims: The diagnostic value of 2-18F-fluoro-2-deoxy-D-glucose positron emission tomography (FDG PET)/CT in the detection of colon carcinoma and adenoma was evaluated retrospectively. Methods: Between May 2007 and June 2008, 102 patients (42 males and 60 females: age range, 28-89 years) underwent both FDG PET/CT and colonoscopy in < a 3 month interval. FDG uptake on PET/CT was divided into physiologic and pathologic uptake by a nuclear medicine specialist. Pathologic confirmation was obtained in all patients. Results: Forty-three patients had no abnormal findings on both FDG PET/CT and colonoscopy. One hundred five and 59 colonic lesions were detected on FDG PET/CT and colonoscopy, respectively. Eleven of 24 lesions with pathologic FDG uptake were histologically-confirmed to be malignancies. Among 18 lesions with physiologic FDG uptake, 1 carcinoma and 1 adenoma were revealed. One carcinoma, 25 adenomas, and 11 hyperplastic polyps did not reveal FDG uptake. Interpretation of pathologic FDG uptake in the colon had a sensitivity of 84.6% and 28.2%, a specificity of 90.4% and 88.1%, a positive predictive value of 45.8% and 45.8%, and a negative predictive value of 98.4% and 77.8% for carcinomas and adenomas, respectively. Conclusions: FDG PET/CT is a very useful diagnostic method for the detection of colon cancer, but the sensitivity is low for adenomas, which may need further evaluation, such as a screening endoscopy. (Intest Res 2010;8:18-23)
시각적 자료를 이용한 영어 강세 지도 방법의 효과성 고찰
강민경(Kang, Min-Kyung),전지현(Jeon, Jihyun) 새한영어영문학회 2013 새한영어영문학 Vol.55 No.4
This study aimed to investigate the effect of English word stress instruction on Korean college students’ English improvement. 40 college students participated in this study and all participants’ speeches were recorded by a visual and auditory tool, Praat. The main results are as follows: (1) Both control and experimental groups didn’t pronounce the English word stress correctly in their pre-test. (2) There was a certain difference between the control group and the experimental group in their post-test results. The experimental group’s mean for accentedness was highly increased while the control group’s mean remained almost the same. (3) It was evident that shorter syllable words had the highest mean score for both pre- and post-tests. (4) The characteristics of Korean college learners’ English word speech were that they tended to place the stress on the first syllable and to give the same amount of stress on each syllable. In conclusion, Korean college learners could improve native-like accentedness by learning the English word stress with a visual and auditory tool. Moreover, learning English stress is not necessarily affected by learner’s age, rather affected by individual differences.
임플란트 적용을 위한 하이드록시아파타이트,이산화티탄 표면의 생체적합성 평가
강민경 ( Min Kyung Kang ),배성숙 ( Sung Suk Bae ) 한국치위생과학회 2016 치위생과학회지 Vol.16 No.1
The objective of this study was to fabricate hydroxyapatite (HA) containing titania layer by HA blasting and anodization method to obtain advantages of both methods and evaluated biocompatibility. To fabricate the HA containing titania layer on titanium, HA blasting treatment was performed followed by microarc oxidation (MAO) using the electrolyte solution of 0.04 M β-glycerol phosphate disodium salt n-hydrate and 0.4 M calcium acetate n-hydrate on the condition of various applied voltages (100, 150, 200, 250 V) for 3 minutes. The experimental group was divided according to the surface treatment procedure: SM (simple machined polishing treatment), HA, MAO, HA+MAO 100, HA+MAO 150, HA+MAO 200, HA+ MAO 250. The wettability of surface was observed by contact angle measurement. Biocompatibility was evaluated by cell adhesion, and cell differentiation including alkaline phosphatase activity and calcium concentration with MC3T3-E1 cells. The porous titanium oxide containing HA was formed at 150 and 200 V. These surfaces had a more hydrophilic characteristic. Biocompatibility was demonstrated that HA·titania composite layer on titanium showed enhanced cell adhesion, and cell differentiation. Therefore, these results suggested that HA containing titania layer on titanium was improved biological properties that could be applied as material for dental implant system.
강민경 ( Min Kyung Kang ),김민아 ( Mi Nah Kim ),유보완 ( Bo Wan Yu ),박중곤 ( Joong Kon Park ) 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.6
맥주 폐 효모액(waste from beer fermentation broth, WBFB)은 바이오 에탄올 생산을 위한 우수하고 저렴한 원료이다. 본 연구에서는 바이오 에탄올 생산을 위해 WBFB의 당화능과 발효능을 확인하는 실험을 진행하였다. 당화능은 온도를 30, 40, 50, 60, 70 oC로 다르게 하여 실험했는데 온도가 올라감에 따라 당화능은 증가하였고 4시간 후 60 oC와 70 oC에서 많은 양의 glucose가 생산되었다. WBFB와 chemically defined media (CDM) 혼합물에서는 어떠한 미생물의 첨가 없이도 발효가 되어 에탄올이 생산되었다. 동시당화발효능을 30, 40, 50, 60 oC의 다양한 온도에서 실험해본결과 30 oC에서 에탄올이 가장 많이 생산되었다. 또 이 실험은 WBFB, starch 용액 그리고 CDM을 이용하여 수행하였는데 WBFB에 있는 당화 효소와 효모가 어떠한 추가적 미생물 첨가 없이 당화와 발효를 가능케 하는 요인이었다. The waste from beer fermentation broth (WBFB) has been found an excellent and inexpensive resource for bioethanol production. We tried to evaluate the saccharification and fermentation capabilities of WBFB to confirm its effectiveness for bioethanol production. The saccharification potentials of the WBFB were evaluated at various temperatures (30, 40, 50, 60and 70 ℃). It was found that the saccharification capabilities increased with temperature and highest reached maximum at 60 ℃ and 70 ℃ after 4h. Ethanol production from a mixture of WBFB and chemically defined media (CDM) without addition of any microbial species confirmed the fermentation capabilities of WBFB. Simultaneous saccharification and fermentation were performed using WBFB, starch solution and CDM as culturing media. The maximum yield of bioethanol production was obtained at 30 ℃. The saccharifying enzymes and the yeast cells present in WBFB were essential factors for the production of bioethanol from WBFB without any additional enzymes or microbial cells.