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레토르트 및 감마선 조사에 의한 화닭 덮밥 소스의 미생물 제어 효과 비교
김영식,김현주,윤요한,신명곤,김천제,신미혜,이주운,Kim, Young-Sik,Kim, Hyun-Joo,Yoon, Yo-Han,Shin, Myung-Gon,Kim, Cheon-Jei,Shin, Mee-Hye,Lee, Ju-Woon 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.1
This study evaluated the antimicrobial effects of retort process and gamma irradiation on reduction of total bacterial populations in spicy chicken sauce, which is served on top of the steamed rice. Commercial spicy chicken sauce was treated with retort and gamma ray at 0, 1, 3, 5, and 10 kGy. Total aerobic bacterial populations were then enumerated on plate count agar and isolated bacteria from the test samples were identified using PCR analysis. Moreover, gamma ray sensitivity of identified bacteria was evaluated by $D_{10}$ values, and genotoxicity of gamma-irradiated samples was examined. Gamma irradiation at 3 kGy reduced total aerobic bacterial cell counts in spicy chicken sauce below detection limit, but total aerobic bacterial cell counts in test samples treated with retort were 2.1 log CFU/g. Identified bacteria from the samples were Bacillus subtilis, B. amyloiquefaciense, and B. pumils, and the $D_{10}$ values for B. subtilis and B. cereus were 0.39 ($R^2\;=\;0.921$) and 0.28 log CFU/g ($R^2\;=\;0.904$), respectively. The SOS chromotest showed that the gamma-irradiated spicy chicken sauce did not cause mutagenicity. These results indicate that gamma irradiation of spicy chicken sauce could be useful in ensuring microbial safety.
초내열합금분말에 의한 PTA 오버레이부의 연삭 마모 특성 연구
김영식,최영국,임창훈,김종도,Kim, Young-Sik,Choi, Young-Gook,Lim, Chang-Hoon,Kim, Jong-Do 대한용접접합학회 2009 대한용접·접합학회지 Vol.27 No.3
The Plasma Transferred Arc (PTA) overlay welding method is lately introduced as one of the most useful surface overlay method of the engine component. In this paper, the overlay welding on the SNCrW heat resisting alloy was conducted by the PTA overlay welding process using the super alloy powder. The characteristics of the overlay layers were investigated through the metallurgical and abrasive test. Experimental results showed that the overlay on the SNCrW heat resisting alloy surface was successfully made without hot cracking. The friction wear characteristics of the Co-base Stellite 6 overlayer were most superior. However the abrasive wear characteristics were most inferior in the Co-base Stellite 6 overlayer.
가정의학과 외래 우울증환자에서 moclobemide의 안전성 및 유효성 평가를 위한 시판후조사
김영식,이근미,김병성,신호철,성은주,이상엽,문유선,송상욱,김철환,선우성,Kim, Young-Sik,Lee, Keun-Mi,Kim, Byung-Sung,Shin, Ho-Cheol,Sung, Eun-Ju,Lee, Sang-Yeoup,Moon, Yoo-Sun,Song, Sang-Wook,Kim, Cheol-Hwan,Sunwoo, Sung 대한임상약리학회 2002 臨床藥理學會誌 Vol.10 No.1
Background : Depression is quite a common disease in primary care however, studies for the safety and effectiveness of antidepressants in primary care setting are rare in Korea. Objectives : This multi-centered post-marketing study was performed to evaluate the safety and effectiveness of Moclobemide and to find out the factors related to the adherence among patients with depression in family practice. Methods : A total of 386 patients were enrolled from July 1999 to January 2000 by twenty family doctors from fifteen family practice centers. They were prescribed Moclobemide and were reevaluated at the 4th, 8th, and l2th week. Evaluation of compliance, safety and effectiveness were performed with pre-made, structured self-reported questionnaires. Evaluation of effectiveness was also performed utilizing self-rating depression scale (SDS). Results : Among 386 patients, safety was evaluated in 310 patients and effectiveness was evaluated in 239 patients. During the first 12 weeks, the number of subjects continuing with Mocclobemide was 136(37.1%). 141 subjects (38.4%) discontinued taking the drug and 90 subjects (24.5%) dropped out at the 12th week. Considering drop-out patients as ineffective cases, overall effectiveness was estimated to be 84.5%. Symptoms improved with time in patients whose follow-up were completed (P<0.01). The SDS score decreased by an average of ${6.8{\pm}9.1(12.2{\pm}19.1%)}$ after 12 weeks(p<0.01). During the study, 33(10.6%) subjects reported adverse events. The most commonly reported adverse events, in descending order, were dizziness(2.3%), headache(1.6%), insomnia(1.3%), facial edema(1.3%), constipation(1.0%), nausea(1.0%) and tremor(1.0%). The main reasons for discontinuing antidepressants were attributed to improvement of symptoms and manifestation of adverse events. Conclusion : The percentage of adherence at 12th week of Moclobemire among patients suffering from depression in the family practice outpatient clinic was shown to be 49%. The antidepressant effect and safety of Moclobemide was relatively superior.
플라즈마 표면 처리가 $BaTa_2O_6$박막의 전기적 특성에 미치는 효과에 관한 연구
김영식,이윤희,주병권,성만영,오명환,Kim, Young-Sik,Lee, Yun-Hi,Ju, Byeong-Kwon,Sung, Mang-Young,Oh, Myung-Hwan 대한전기학회 1999 전기학회논문지C Vol.48 No.5
Direct current(d.c.)leakage current voltage characteristics of radio-frequencymagnetron sputtered BaTa\sub 2\O\sub 6\ film capacitors with aluminum(A1) top and indium tin oxide (ITO) bottom electrodes have been investigatedas a function of applied field and temperature. In order to study surfacetreatment effect on the electrical characteristics of as-deposited film weperformed exposure of oxygen plasma on $BaTa_2O_6$ surface. d. c.current-voltage (I-V), bipolar pulse charge-voltage (Q-V), d. c. current-time (I-t) andcapacitance-frequency (C-f) analysis were performed on films. All ofthe films exhibita low leakage current, a high breakdown field strength (3MV/cm-4.5MV/cm), and high dielectric constant (20-30). From the temperature dependence of leakage current,we can conclude that the dominant conduction mechanism is ascribed toSchottky emission at high electric field (>1MV/cm) and hopping conduction at lowelectric field (<1MV/cm). According to our results, the oxide plasma surfacetreatmenton as-deposited $BaTa_2O_6$ resulted in lowering interfacebarrier height and thus, leakage current when a negative voltage applied to the A1 electrode. This can be explained by reduction of surface contamination via etching surface and filling defects such as oxygen vacancies.
김영식,주영승,Kim, Young-Sik,Ju, Young-Sung 대한본초학회 2016 大韓本草學會誌 Vol.31 No.4
Objectives : This study is to propose discriminative keys with stereoscope for minute seed herbs easily mixed up, but hard to discriminate by naked eyes: Alli Tuberosi Semen(ATS)?Alli Fistulosi Semen(AFS), Malvae Semen(MS)? Abutili Semen(AS), Plantaginis Semen(PS)?Schizonepetae Semen(SS).Objectives : We reviewed the description of original plants and medicinal herbs from literature. The specimen of original plant were collected, determinated and compared to samples in the market. Primary classification was performed with naked eyes. and we found out other discrimination keys for non-distinctive herbs with stereoscope. Discrimination keys were set as the morphological criteria of authentic herbs, percentage of adulteration, and standards for discriminating genuine herbs from adulteration.Results : 1) ATS is bigger, has reticulate pattern on protuberant side and unique garlic chives taste. AFS which is usually mixed up, is smaller, has 1~2 ridges and unique welsh onion taste. 2) MS is smaller, has no villus, but its length of bumps are similar. AS easily mixed up, is bigger and has white villus. Its upper side bump is longer and more sharp. 3) PS has dent at middle of the back side. It becomes very sticky when it is put or boiled in water. SS which can be mixed up has no dent and low viscosity compared to PS.Conclusions : With this result, we propose discriminative keys which can identify the original plants and processed herbal state of six herbs. Because minute medicinal herbs are hardly distinguishable by sensory test, It is essential to differentiate by using stereoscope.