포장재질에 따른 김치의 저장성Ⅰ

강미정,윤경영,이광희,윤광섭,김광수 대구효성가톨릭대학교 식품과학연구소 1997 식품과학지 Vol.9 No.-

수출용 김치에 주로 사용되고 있는 유리병을 대상으로 유통과정 중 상품성 유지와 더불어 저장성 향상을 도모하고자 포장방법에 따른 저장성 효과를 비교ㆍ실험하였다. 포장방법은 유리병을 이용하여 밀폐포장과 투과성 포장을 하였으며 내부 포장재로 사용한 PE film 두께별(0.01, 0.06, 0.08, 0.1㎜) 저장성 향상능력을 비교하였다. 포장김치는 10℃에서 28일간 저장하면서 pH 및 산도, 색도의 변화와 관능적 품질변호를 측정하였다. 저장기간에 따른 pH와 산도의 변화에서 포장방법간에 큰 차이는 없었으나 밀폐 포장의 경우 film 두께가 다소 얇은 0.06, 0.01㎜ 처리구에서, 투과성 포장의 경우 film 두께가 다소 두꺼운 0.06, 0.08㎜ 처리구에서 높은 pH와 낮은 산도를 나타내었다. 특히 0.06㎜ 처리구의 경우 포장방법에 관계없이 control이나 타처리구에 비해 완만한 pH와 산도변화를 나타내었고, 상미한계점이 연장될 뿐만 아니라 효모에 의한 연부현상이나 탄산가스에 의한 뚜껑의 개봉이나 폭발음 등의 현상이 나타나지 않았다. 색도 측정시 저장 14일을 전후로 증가하던 L, a, b값이 감소하는 경향이었으며 이는 밀폐 포장과 투과성 포장에서 동일하게 나타났다. 관능적 품질평가에서 포장방법간에 큰 차이는 없었으나 신맛과 조직김이 유의적인 관계가 있는 것으로 보였고, 상미한계점을 경과할수록 조직감이 기호도를 좌우하는 것으로 나타났다. 또한 0.06㎜ 투과성 포장시 밀폐 포장보다 신맛이 좋은 것으로 나타났다. 저장 14일 이후부터는 0.06㎜ film 처리시 관능적 품질평가 전반에 걸쳐 우수한 것으로 인정(5%의 범위)되었다. 이상의 결과로 유리병포장의 경우 기체투과성이 높은 PE film으로 내부포장하는 것이 저장성 연장효과를 기대할 수 있으며, 특히 0.06㎜ film으로 밀폐 포장 또는 투과성 포장시 높은 저장성 연장효과와 더불어 탄산가스에 의한 팽창방지를 완화시킬 것으로 기대된다. The effect of various packaging methods on kimchi quality was investigated in order to develop the packaging techniques for preventing bottled kimchi products from inflation and expolsing, due to fermentative gas evolved during storage and distribution. Kimchi was packaged in bottle(400g) under atomosphere different methods; 1) control, 2) airtight packaging, 3) permeable packaging, Kimchi packaged with polyethylene(PE) film was stored at 10℃ and film thickness were used 0.01, 0.06, 0.08, and 0.1㎜. To evaluated quality change of kimchi, pH, acidity, color, and sensory score were measured periodically. Although pH and acidity change was not significant depending on the packaging method, airtight packaging with 0.06, 0.01㎜ film and permeable packaging with 0.06, 0.08㎜ film showed higher pH value and lower acidity then those of the others. Color change at kimchi as L, a, b value increased until 14 days and the decreased in airtight and permeable packaging. Sensory evaluation were not significant among packaging method during storage, but sour taste and texture scores were significant. Also, sour tast of permeable packaging with 0.06㎜ film showed higher than airtight packaging. After 14 days of storage, total sensory evaluation was excellent of packaging with 0.06㎜ film. Therefore, 0.06㎜ was found to be the most effective packaging method, although airtight and permeable packaging were not significant for storage properties.

김치의 제조 및 유통중 가스발생 방지에 관한 연구

윤경영,강미정,이광희,윤광섭,김광수 대구효성가톨릭대학교 식품과학연구소 1997 식품과학지 Vol.9 No.-

대량생산을 위한 김치의 산업화에 있어서 가장 큰 문제점인 유통시의 산패현장과 포장팽대 및 파손을 지연시켜 김치의 저장기간을 연장하고자 이산화탄소 흡수능력을 가진 물질을 가스흡수제로 처리하여 저장중 김치의 품질을 검토하였다. 품질평가를 위한 측정항목은 pH, 산도, 색상, 이산화탄소 함량 및 젖산균수 그리고 총균수를 측정하였다. 수산화칼륨, 수산화칼슘, 수산화나트륨과 같은 알칼리물질과 연화마그네슘, 염화칼슘과 같은 염화합물을 가스흡수제로 사용한 결과, 수산화칼륨과 수산화나트륨처리구가 타처리구에 비해 pH의 감소가 적었으며, 또한 산도의 증가가 다소 낮았다. 수산화칼륨과 수산화나트륨을 각각 0.25%, 0.5%, 0.75% 세단계의 농도로 처리한 결과 pH와 산도에 있어서 수산화칼륨처리구가 수산화나트륨처리구에 비해 높은 pH와 낮은 산도를 나타내었다. 또한 각 처리구의 농도에 따라 큰 차이가 나타나지 않아 간편성과 경제적인 면, 그리고 시각적인 면을 고려해 볼 때 0.25% 수산화칼륨처리구가 탄산가스흡수에 의해 김치의 저장기간을 연장하는데 다소 효과를 보였다. PE bag으로 포장된 수산화칼슘과 PE flim(0.02㎜)으로 포장한 0.25% 수산화칼륨을 가스흡수제로 사용하여 무처리구와 비교하여 저장중 김치의 품질을 검토하였다. 저장중 0.25% 수산화칼륨처리구와 시판용 김치의 가스흡수제인 수산화칼슘처리구를 비교할 때, 수산화칼륨처리구가 무처리구에 비해 pH 및 산도의 차이가 컸으며, 김치의 조직과 국물속에 용해되어 있는 이산화탄소의 함량도 적었다. 그리고 총균수에 있어서 타처리구에 비해 수산화칼륨처리구가 높은 값을 나타내었다. When kimchi was manufactured and circulated, largest question is rancidity phenomenon and packing swelling. This study was conducted to prevent these phenomenon and prolong the shelf-life of kimchi. KOH, NaOH, Ca(OH)_2, MgCl_(2), and CaCl_(2) were used to gas-absorbent. The pH of kimchi used KOH, NaOH was higher than the others. The acidity of kimchi used KOH, NaOH was lower than the others. The concentration of KOH, NaOH was 0.25%, 0.50%, 0.75%. The decrease of pH and increase of acidity that kimchi dealt with KOH were lower than kimchi used NaOH. There in no significant difference in concentration of gas-absorbent. Comparision of kimchi used 0.25% KOH and Ca(OH)_2. Ca(OH)_2 packaged PE bag and 0.25% KOH packaged PE film(0.02㎜) were used to gas-absorbent. On comparision to control, kimchi dealt with 0.25% KOH was higher than kimchi used Ca(OH)_2 at pH and acidity. The CO_(2) contents of kimchi dealt with 0.25% KOH was lowest. The number of total microbe kimchi dealt with 0.25% KOH was highest.

새로운 腸內細菌培地製造에 關한 硏究

윤영래,고광균 순천향대학교 1990 논문집 Vol.13 No.1

This study was performed to develope culture medium from the extract of Anadara granosa which favored the growth of Shigella flexneri and Salmonella typhi for the detection of the carriers of Shigella and Salmonella. The new medium was tested for the growth of the bacteria and the ability to form bacterial colonies, and compared with other various media. The following results were obtained 1. The Anadara agar medium were better than Brain Heart Infusion, MacConkey Nutrient and Salmonella-Shigella agar for the isolation of Shigella flexneri and Salmonella typhi. 2. The Anadara agar was the best media to recover Shigella flexneri even with diluted inoculation but the Salmonella-Shigella agar was the worst. 3. The Anadara and the Nutrient agar were the best media to recover Salmonella typhi even with diluted inoculation but the MacConkey agar was worst.

청국장 타블렛의 제조와 품질 특성

윤광섭 동아시아식생활학회 2004 동아시아식생활학회지 Vol.14 No.5

This study was carried out to develop a new product using Cheonggukjang (fermented soybean product) and sub-ingredients(lactic acid bacillus powder, chlorella, lactose, green tea). Fresh Cheonggukjang was dried by a infrared drying (50℃, 36hr) and powdered by a roll mill. The powder was mixed with sub- ingredients and then moulded as tablet type by a press moulder. The pH of tablet was low with the addition of lactobacillus and total sugar content was high with the addition of lactose. Disintegration, absorption capacity and textural properties of tablet were not affected by the addition of any sub-ingredient. Color of non-added tablet was yellow to red, but changed to green when chlorella was added. Sensory properties(color, taste, flavor, chewiness, hardness, acceptability) were not affected by the addition of sub-ingredients. The results indicate that functional healthy tablet could be made from Cheonggukjang powder and various sub-ingredients.

FAN용 외전형 BLDC전동기 설계 및 특성해석

윤선기,박영일,이광호,조윤현 東亞大學校 1999 東亞論叢 Vol.36 No.-

Permanent magnet brushless motors are increasingly being used in high performance applications. The advantage of using a BLDC motor is that is can be controlled to have the speed-torque characteristics similar to that of a permanent magnet DC motor. In addition, the BLDC motor has low ineria, large power to volume ratio, and low noise as compared with the permanent magnet DC servo motor having the same output rating. This paper is proposed the design method of Outer Roter BLDC for a blower fan by the magnetic equivalent method. In order to compute and estimate the performance parameter of Outer type BLDC, the dynamic model and charateristics analysis of BLDC is simulated by Matlab.

새로운 腸內細菌培地製造에 關한 硏究

윤영래,고광균 순천향대학교 1990 Journal of Soonchunhyang Medical Science Vol.13 No.1

음성인식을 이용한 컴퓨터 게임의 구현에 관한 연구

윤재선,최광표,이두성,홍광석 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1

In this paper, we present a speech recognition game, "Voice Illust Magic". "Voice Illust Magic" is on-line windows game using speech recognition algorithm HMM. Because this game can be performed by not only the mouse and keyboard but also speech recognition, the users can use the computer easily. The speech recognition process of computer games detects the endpoint of input speech automatically which is received through the microphone and then extracts the feature parameter, Mel cepstrum. The VQ sequences of input speech are compared with the reference models of word unit and the optimal model is selected among reference HMMs. The puzzle games transfer the message of the recognized game command which performs the same operation as the keyboard and mouse into the windows interface. Since input speech is not compared with all reference patterns but the reference patterns of each state, this method can reduce the recognition time and can improve the recognition rate.

장애인근로자 유형에 따른 직무만족에 관한 연구

윤광식,이선규 금오공과대학교 산업기술개발연구원 2000 産業技術開發硏究 Vol.16 No.-

This study aims to assess suitable jobs to disabled workers according to the relationship between job satisfaction and type of disability and grade of disability. The surveys were conducted for the disabled employees in the Taegu and KyungBuk area Korea. Interest in the productivity and job satisfaction of the disabled, as a subgroup of socially alienated people, has strongly increased in modern society. Especially, congenital disability is increasing yearly at a rate higher than acquired disability. A number of people who become disabled rise by about 150,000 each year, and surprisingly 88% of the disabled were congenital. The results of this study can be used not only to increase the overall productivity of workers, but also to determine organizational strategy in terms of human resource management.

특수일 전력수요예측을 위한 신경회로망 시스템의 개발

윤형선,김광호,이철희 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

Conventional short-term load forecasting techniques have limitation in their use on holidays due to dissimilar load behaviors of holidays and insufficiency of pattern data. Thus, a new short-term load forecasting method for special days in anomalous load conditions is proposed in this paper. The proposed method uses two Artificial Neural Networks(ANN); one is for the estimation of load curve, and the other is for the estimation of minimum and maximum value of load. The forecasting procedure is as follows. First, the normalized load curve is estimated by ANN. At next step, minimum and maximum values of load in a special day is obtained by combining these two outputs of ANNs. The proposed method shows a good performance, and it may be effectively applied to the practical situations.

결함 허용 파일서버의 설계에 관한 연구

진광윤 三陟大學校 2001 論文集 Vol.34 No.1

This paper presents the design of fault-tolerant file servers, which operate on top of microlevel-based as high-level servers. In SPAX, superhigh Internet and so on, it is one of user's requirements to solve the problem of data integrity in data-processing servers with a larger capacity. Such data integrity can enhance the reliability on fault-tolerance by technically solving the breakdown recovery of fault-tolerance in the level of kernel rather then in the level of application. However, the techniques of fault-tolerance in the level of application are beyond the right of the media that store data. Hence, there are restrictions in some degree on the occurrence and recovery of faults. Accordingly, our future research is on guaranteeing the transparency on application by means of guaranteeing the integrity of the data on disk, important media composing general file systems, or servers in the level of kernel.