Effect of sous-vide cooking conditions on the physicochemical, microbiological and microstructural properties of duck breast meat

Dong-Min Shin,Jong Hyeok Yune,Dong-Hyun Kim,Sung Gu Han Asian Australasian Association of Animal Productio 2023 Animal Bioscience Vol.36 No.10

Objective: Sous-vide cooking offers several advantages for poultry meat, including enhanced tenderness, reduced cooking loss, and improved product yield. However, in duck meat, there are challenges associated with using the sous-vide method. The prolonged cooking time at low temperatures can lead to unstable microbial and oxidative stabilities. Thus, we aimed to assess how varying sous-vide cooking temperatures and durations affect the physicochemical and microbial characteristics of duck breast meat, with the goal of identifying an optimal cooking condition. Methods: Duck breast meat (Anas platyrhynchos) aged 42 days and with an average weight of 1,400±50 g, underwent cooking under various conditions (ranging from 50℃ to 80℃) for either 60 or 180 min. Then, physicochemical, microbial, and microstructural properties of the cooked duck breast meat were assessed. Results: Different cooking conditions affected the quality attributes of the meat. The cooking loss, lightness, yellowness, Hue angle, whiteness, and thiobarbituric acid reactive substance (TBARS) values of the duck breast meat increased with the increase in cooking temperature and time. In contrast, the redness and chroma values decreased with the increase in cooking temperature and time. Cooking of samples higher than 60℃ increased the volatile basic nitrogen contents and TBARS. Microbial analysis revealed the presence of Escherichia coli and Coliform only in the samples cooked at 50℃ and raw meat. Cooking at lower temperature and shorter time increased the tenderness of the meat. Microstructure analysis showed that the contraction of myofibrils and meat density increased upon increasing the cooking temperature and time. Conclusion: Our data indicate that the optimal sous-vide method for duck breast meat was cooking at 60℃ for 60 min. This temperature and time conditions showed good texture properties and microbial stability, and low level of TBARS of the duck breast meat.

ART2를 이용한 세라믹 영상에서의 다양한 결함 검출

김주혁(Ju-Hyeok Kim),한민수(Min-Su Han),우영운(Young-Woon Woo),김광백(Kwang-Baek Kim) 한국컴퓨터정보학회 2013 한국컴퓨터정보학회 학술발표논문집 Vol.21 No.2

본 논문에서는 비파괴 검사를 통하여 얻은 세라믹 영상에 퍼지 기법과 ART2 기법을 적용하여 결함을 검출하는 방법을 제안한다. 제안된 방법은 세라믹 소재로 얻어진 영상에서 결함의 구간을 설정하기 위해 퍼지 스트레칭 기법을 적용하여 명암도를 대비시킨다. 명암 대비가 강조된 영상에서 퍼지 이진화 기법을 적용한 후, 상/하 경계선에 가장 많이 분포된 곳을 Max, Min으로 설정하고, Max+20, Min-20을 결함 구간으로 설정한다. 설정한 결함 구간 내의 비파괴 세라믹 영상에서 ART2 알고리즘 기법을 적용하여 세라믹 영상의 결함을 검출한다. 본 논문에서 제안된 방법을 비파괴 세라믹 영상을 대상으로 실험한 결과, 제안된 방법이 기존의 세라믹 결함 검출 방법보다 비파괴 세라믹 영상에서 다양한 형태의 결함이 검출되는 것을 확인하였다.

고압멸균 처리시간에 따른 닭 체내 조류인플루엔자와 뉴캐슬병 바이러스의 멸균효과

이진주 ( Jin Ju Lee ),김동혁 ( Dong Hyeok Kim ),임정주 ( Jeong Ju Lim ),김대근 ( Dae Geun Kim ),민원기 ( Won Gi Min ),이후장 ( Hu Jang Lee ),장홍희 ( Hong Hee Chang ),김석 ( Suk Kim ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.4

Avian influenza (AI) and Newcastle disease (ND) distress a variety of avian species, especially domestic poultry. Severe syndromes are caused by highly virulent specific virus strains termed highly pathogenic AI and velogenic ND viruses, which are potential agrobioterrorism agents. This outbreak emphasizes the need for continuing cooperation between public health and veterinary medical communities in controlling AI and ND when it has a zoonotic potential. Up to date, the stamping out and burying system were applied for controlling methods against these highly infectious diseases in the ordinary way, however these methods had many environmental problems, including leachat and effluvium. Thus, we assessed that sterilization effect of AI and ND virus dependent on several treatment conditions, such as autoclaving time and cutting types of chicken. As a result, we found that the cutting type of chicken meat revealed a reduced HA titer (20) against both of AI and ND virus after 10 min of autoclaving, while whole chicken showed same titer after 30 and 60 min. Therefore, we propose that the conditions of treatment on infected chicken should be developed for convenient, affordable, and effective prevention methods against for AI and ND.

이주노동자의 지역별 특성과 지역사회 적응: 대구시 달서구, 경북 경산시, 구미시를 사례로

권혁민 대구대학교 다문화사회정책연구소 2012 현대사회와 다문화 Vol.2 No.1

한국 내 유입된 이주노동자의 수는 2000년을 기점으로 급격히 증가하여, 2011년 현재 543,447명에 이르렀다. 이러한 분위기에서 이주노동자에 대한 논의는 이주과정, 직장과 지역사회에서의 적응 및 특성 등의 측면에서 진행되어 왔다. 하지 만 이러한 논의들은 주로 전국 단위 또는 특정지역에 국한되어 있고, 이들이 실제로 거주하고 있는 지역별 특성에 관한 연구는 제대로 이루어지지 않고 있다. 따라 서 도시규모에 따른 이주노동자의 지역별 특성과 지역사회 적응과정을 비교·분석 해볼 필요가 있다. 본 연구는 도시규모에 따라 대구시 달서구, 경산시, 구미시를 대도시, 대도시 근교도시, 지방중도시로 구분하여 이주노동자의 특성 및 적응을 비교하였다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 이주노동자의 이주요인 및 과정은 지역별로 매우 다양한 응답을 보였다. 둘째, 한국 입국 후 취업한 직장의 특성은 대구시 달서구와 경산지역 이주노동자가 대체로 유사하게 나타났다. 셋째, 지역사회 생활은 대구시 달서구와 구미지역 이주노동자들이 비슷하게 나타났는데, 특히 주거지 유형, 지역사회 정체성, 소비 및 지출에서 동일한 응답을 보였다. 본 연구 결과는 앞으로 지역별 이주노동자 정책수립에 필요한 기초자료를 제공해 줄 것으로 기대된다. The number of immigrant workers in Korea has increased sharply since 2000, and reached up to 528,812 in 2008. Recent discussions about immigrant workers have been mainly focused on the aspects such as immigrant course and adaptation and characteristics in workplace and regional community. Those discussions, however, have been biased to national level or specific regions and thus studies on characteristics at local level in which they actually reside have been limited, it can be argued that and hence we need to investigate characteristics and adaptation of each region by comparing immigrant worker’s regional units classified by sizes of cities. The purpose of this study, therefore is to compare characteristics and accommodation of immigrant workers in three of different size of cities, that is, large city, suburban city of large city, local small-medium city, which are represented by Dalseo-gu in city of Daegu, city of Gyeongsan, and city of Gumi. The findings of this study are as follows: - First, the respondents about immigrant factors and immigration courses were highly varied by regions. Second, It is found that characteristics in workplace in which they work after immigration to Korea were similar between them in city of Dalsu-gu and Gyeongsan, especially in size of company, job in home country, reason for employment, and work hours. Third, It is found that there were simi- larity in life in regional community between workers in the city of Daegu and Gumi, especially in the type of residence site, identity of regional community, and consumption and expense, especially there is no difference in reason selection of residence site and identity in workplace. It is expected that the results of this study will contribute to policy making about immigrant workers of each region in future by providing fundamental data.

기업문화 유형이 정보기술 도입에 미치는 영향

김종민,권혁기 동의공업대학 2000 論文集 Vol.26 No.1

The information technology should be introduced for firms to cope with the environment and in the introduction of information technology means that the infrastructure or ability for organizational change is established. But whether the firm is successful to the introduction of information technology or not depends on its specific corporate culture. Therefore. the success in the introduction of information technology is prerequisite for a firm to success in the organizational change, and there are corelationships among these three factors. The result of empirical test and the implication of managerial aspects are as follows, In case of the relationships between the type of corporate culture and the introduction of information technology, If we classify the corporate culture as 4 types (development, group, rational, hierarchical culture), control-oriented culture has a negative impact on the success, In the case of the relationship between the type of corporate culture and the resistance against organizational change, If we classify as 4 types, control-oriented culture has a positive impact on the resistance. Therefore, in order to improve the success in the introduction of information technology we should change rigid, multi-hierarchical, skyscraper organization to flexible, small-hierarchical, flat organization. The change lessens the degree of resistance and increases the degree of success in the introduction of information technology. As a result, flexibility-oriented culture is critical to the success in introduction of information technology. Korean firms should make an effort to establish the flexibility-oriented corporate culture. We must promote the decentralization, open communications, democratic decision-making and strategic management in the long-run perspectives. Further research regarding this topic will contribute to increase the competitive power of Korean firms by improving the corporate culture.

전립선암과 전립선비대증 환자에서 혈청 유리 및 총전립선특이항원 측정의 의의

서혁준,박형민,권태균,정성광,김법완,이재태 경북대학교 의학연구소 2000 경북대학교병원의학연구소논문집 Vol.4 No.1

Purpose: This study was peformed to investigate whether the free to total PSA ratio(F/T PSA ratio) offers a better discriminant for the detection of patient with prostatic cancer(CaP) and those with benign prostatic hyperplasia(BPH) than serum total PSA alone. Materials and Methods: From September 1996 to February 1999, free and total PSA levels were measured on frozen sera samples of 154 men with BPH and 46 with CaP using immunoradiometric assay. Results: In all subjects, the mean total PSA was significantly higher in CaP group(72.57±66.58ng/ml) than BPH group(3.12±4.10ng/ml). The mean PSAD was significantly higher in CaP group(1.64± 1.86) than BPH group(0.08±0.01). The mean F/T PSA ratio was significantly lower in CaP group(0.19± 0.07) than BPH group(0.30±0.13). Among 41 subjects whose total PSA were between 4-20ng/ml, the mean PSAD was significantly higher in CaP group(0.37±7.16) than BPH group(0.17± 0.07), but the mean F/T PSA ratio was not significantly different between CaP(0.19± 0.10) and BPH group(0.25±7.13). By comparing the sensitivity and specificity of total PSA alone, PSAD and F/T PSA ratio on receiver operating characterislic (ROC) Cutie in all subiects and subiects with total PSA between 4-20ng/ml, F/T PSA ratio had no superiority than total PSA alone and PSAD for discrimination between CaP and BPH. Conclusions: We suggest that the F/T PSA ratio is not superior to total PSA alone and FSAD in the detection of prostatic cancer, and further evaluation of the usefulness of F/T PSA ratio should be required.

組織變化에 대한 抵抗이 情報技術導入 成功에 미치는 影響에 관한 연구

김종민,권혁기 동의공업대학 1999 論文集 Vol.25 No.1

In modern organization, during process of change and crises in rapid changing environment, there're several barriers in managing strategic changes in organization to make successful information technology(IT). They are inadequate management technique lacking ability to communicate logically on change decision, vision in the member of on change process and lack of support and last the consequential resistance to change, from uncertainty and fear on the future. Therefore, We should focus on the fact that successful management of resistance is a prerequisite on successful information technology. In large view, the research is based on hypothesis. The resistance to organizational change will have negative effect on IT success. Research on the 23 small firms of information and communication industry showed that the resistance to organizational change influence the IT success. In this study, it is found that the resistance to organizational change was negatively related with IT success. In conclusion, if an organization copy quickly with motivate and stabilize itself through successful resistance management, it can have relative strong competitive edge to others. So, management of resistance in organizational change is the matter of IT success. The outcome of this study can provide some useful theoretical implications as well as practical ones.

조선초기 禮治社會를 향한 수도 한성 건설계획

임민혁 서울시립대학교 서울학연구소 2006 서울학연구 Vol.- No.27

The main family which established Joseon dynasty tried to rule the country with ritual using it as an instrument in different ways. The political and social relationship between the ruler and the ruled reproduced and maintained the artificial rank system through systemized national etiquette and shrines. It was, as Jeong Do-Jeon mentioned, a means to observe order according to social position. The Hansung castle walls which were built under Ritual Governance (Yechi) system and the standards were significant as a symbolic construction to structuralize order between the ruler and the ruled. Thus, the capital city of HanSung was built based on the decorum system. The 'Shrine-Prior Construction' theory was one of them. Shrines and the royal palace symbolized filial Piety, respect and dignity, and the castle walls were more like a fortress to protect the capital city. In particular, the former was the political and moral principle for Chin-chin (intimate with kindred people) and Jon-jon(respect someone who deserves to be respected though the person is not kindred), which was the essence of decorum. We Can see that they respected the dignity of the royal palace from their efforts to build the capital city in the heart of the country. The location of Hansung was decided based on 'Taekjoong'(choosing the center of the territory) theory. The center, the most remarkable part, means dignity of a King. I suppose that private houses around the palace should have been restricted depending on their ranks. The royal palace, which was the most dignified place of the dynasty, had to be built in an appropriate size and Structure. Jeong Do-Jeon explained that the decorum system is to demonstrate the ranks and to define the upper and lower classes. Therefore, it was natural that the castle town was built according to the basic construction principles such as Zuamyowoosa(building a shrine on the left while building an altar to the State deities on the right), Samzosammun(three courts and three doors), Jeonzohuchim(a court in the front and the King's bedroom in the back) and Jeonzohusi(a court in the front and a market in the back). Since Ohmunsamzo(five doors and three courts) was the Chinese way to construct a palace, Joseon, which was a subordinate country of China, could not employ this method. We can see that a shrine was built on the left side while an altar was built on the right side, out of the palace, and there were three doors. We also can see the features of the buildings which were erected in accordance with the decorum system in each building. The number of antefixes varied depending on the status(position) of the building, as well as the number of stairs of a stairway. The number of convexes on a long log, the number of short logs, the height of Wol-dae and size can also be explained in the same way. Thus, the distinction between upper and lower class which was expressed by the number of interior facilities even in a small building at the palace, was a revelation of their active will to establish Yechi society.

냉동보관한 동종혈관이식에 대한 실험적 연구

탁민성,오혁수 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Autologous vein transplantation is a common microsurgical procedure for correcting vascular defects but requires the availability and harvesting of the vein. Use of stored allogenic grafts would deliminate these requirements, but tissue antigenicity remains a problem. It Is well-known that the antigenicity of allogenic tissues can be reduced after storage at very low temperatures. With this in mind, Cryopreserved allogenic vessel transplantation was performed in the rat model to determine the possible clinical potential of allogenic vessel transplantation without immunosuppression. METHOD : Sprague Dawley rats were used, anesthetized with pentobarbital at a dose of 2mg/100gm, administered intraperitoneally. About 8mm of left femoral artery was harvested. The vessels were immersed in 10% DMSO for 30minutes. The Temperature in the freezer was dropped in a stepwise fashion from 20°C to -70°C, according to the freezing plan. Then the vessel were preserved in liquid nitrogen at -196°C for 2months. For the thawing method, the vessels were thawed at 37°C for Iminutes. the donor arteries were transplantated into another rat's femoral artery. At various times from the first to the twelfth week after surgery, gloss and histopathological study were carried out. CONCLUSION : The vessel were found to be in good condition at the end of the 8week observation period. The cryopreserved specimens showed no sign of infiltration by inflammatory cell and retained a normal three-layer structure of intima, media and adventitia. and sufficient intimal regeneration was observed over the entire graft. These results suggest that prolonged cryopreservation of vessels makes allotransplantation without immunosuppression possible.

Study of the Fuel Characteristics of Torrefied Spent Coffee Ground

Rabin Nepal,Hyeok Jin Kim(김혁진),Chan Park(박찬),Min Jeong Song(송민정),Sea Cheon Oh(오세천) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7

Energy deficiency and global warming has become a serious issue in the world. Excessive dependency on fossil fuel is one of the major reasons for this so the alternative sources of energy need to be promoted and developed. Biomass to energy could be a better option where the conversion of the waste biomass to fuel could be a prominent solution for energy and environmental point of view. Thus, this study used torrefaction to improve the fuel characteristics of spent coffee ground (SCG). Spent coffee grounds are the waste (residue) generated during the brewing process of coffee. Torrefaction is an emerging thermal biomass pretreatment method that helps in increasing the fuel characteristics of biomass. The torrefaction of SCG was investigated in a horizontal tubular reactor at a temperature of 250, 270, 290, 310, 330 & 350℃, for the residence time of 0, 10, 20 & 30 mins. The torrefied products were characterized and analyzed in terms of their energy yield, mass yield, calorific value, elemental composition, cell structure, etc. The gaseous products from the torrefaction of SCG were also analyzed. Furthermore, the study reveals that the carbon content increases &oxygen content with an increasing torrefaction temperature which helps in increasing the fuel characteristics of SCG.