마쇄고추를 첨가한 김치의 이화학적 성분 변화 및 관능적 특성

황성연,박소희,강근옥,이현자,복진흥 한국식생활문화학회 2005 韓國食生活文化學會誌 Vol.20 No.2

We investigated the physico-chemical and sensory characteristics of Kimchi made with red pepper that was washed and mashed. The pH of juice from Kimchi made with red pepper powder was the highest on the day of Kimchi preparation. In the case of Kimchi made with mashed red pepper, the pH of juice and liquid was lower than that of other samples. A similar decrease in pH of juice and liquid was observed up to the second week of fermentation, but the significant difference between both samples wasn't found. The total acidity of Kimchi with mashed red pepper was significantly increased during early fermentation, but was similar during the second week, compared with that of Kimchi with red pepper powder. From the third week of storage, both juice and liquid from Kimchi made with red pepper powder was relatively increased. L and a value of liquid was highest in the case of Kimchi made with mashed red pepper, but b value was lowest during fermentation. In the case of organic acids. acetic acid and lactic acid contents were increased in Kimchi made with mashed red pepper while fermentation progressed. In addition, citric acid content was constant up to the second week in Kimchi made with mashed red pepper but from the third week wasn't detected in both Kimchi made with mashed red pepper and Kimchi made with red pepper powder. In the case of QDA(Quantitative Descriptive Analysis) profiles, the values of Kimchi made with mashed red pepper were significantly higher than those of Kimchi made with red pepper powder in respect to redness, pungency and fresh flavor immediately after the preparation of Kimchi and during the second week of fermentation, but during the fifth week the values were higher in respect to redness and fresh flavor of Kimchi. Appearance and overall acceptability was remarkably increased in Kimchi made with mashed red pepper, compared with that of Kimchi made with red pepper powder immediately after pickling, during the second and the fifth week of fermentation. Therefore, these results indicate that mashed red pepper increased more citric acid content, L and a value of Kimchi in comparison with red pepper powder, resulting in the good effects on overall acceptability due to the significant increase of redness and fresh flover.

대구 및 인근지역의 도로먼지에 함유된 미량원소성분의 함량분포

황윤정,황승만,최진수,김무식,백성옥 嶺南大學校 環境問題硏究所 1998 環境硏究 Vol.17 No.2

요약문 본 연구는 각종 먼지 가운데서도 독성이 가장 큰 것으로 알려진 도로먼지에 함유된 미량원소 성분이 조성 및 특성을 파악하기 위해 1992년 1월에서 10월가지 주거지역, 상업지역, 공업지역, 교외지역, 전원지역 등에 위치한 도로에서 시료를 채취하였으며 채취된 시료는 산으로 추출한후 ICP로 분석하였다 . 그 결과 토사 및 황사현상과 같은 자연발생원과 연관지을 수 있는 Al, Ca, Mg, Ti, Si, Na, K의 농도가 지역에 따라서는 전원지역과 교외지역에서, 그리고 도로포장 형태에 따라서는 비포장 도로에서 높게 나타난 반면에, 각종 연소 및 차량과 같은 인위적인 발생원과 관련이 있는 As, Cr, Mn, Zn, Pb, Cu, Ni는 공업지역 및 상업지역, 그리고 아스팔트에서 비교적 높게 검출되어 이러한 미량원소성문들의 농도분포는 지역에 따라, 그리고 도로포장 형태에 따라 특징적인 양상을 나타내는 것으로 조사되었다. 또한 As, Pb, Al 등의 일부 미량원소성분들의 농도는 계절에 따른 차이를 나타내었으며, 농축계수에 의한 평가결과 농축계수가 낮게 나타난 Na, Si, Ti, K, Al 등은 자연발생원에 의해 상당한 영향을 받는 반면에 As, Pb, Zn 등은 농축계수가 매우 높게 나타나 이들 성분의 경우에는 인위적인 발생원에 의한 기여도가 큰 것으로 평가되었다. Abstract This study was carried out to characterize the trace elements in street dust known to contain several toxic elements. Street dust was collected in residential, commercial, industrial, suburban and rural area of Taegu and on the vicinity of Taegu from January to October, 1992. Total amount of 16 trace elements in street dust were analyzed by ICP spectrophotometer. While the levels of As, Cr, Mn, Zn, Pb, Cu and Ni were higher in industral and commercial area than any other area by sites and the highest levels appeared on asphalt and cement street by street conditions. Also the concentrations of some trace elements originated mainly from soil (e.g. Al, Ca, Mg, Si, Na) were higher in rural and suburban area by sites and the highest levels appeared in unpaved street by street conditions. The concentrations of several trace elements such as Aa, Pb, Al appeared seasonal differences. The estimated enrichment factors (EF) for Na, Si, Ti, K and Al components showed with soil compositions appeared to have low values, while As, Pb and Zn components showed relatively higher values. These results imply that the latter constituents were likely to be affected by dry and wet depositions of atmospheric particles orginated from anthropogenic sources such as fuel combustion and refuge burning.

베타락탐계 항생제 합성과 항균성

고옥현,강형룡,유진철,김경수,홍석순,김영수,황화영,하재천 조선대학교 약학연구소 1992 藥學硏究誌 Vol.14 No.1

7β[5-(Substituted) phenyl-2H-tetrazol-2-yl]acetamidocephalospranic acid, 7β-(5-Diphnenyl-methyl-2H-tetrazol-2-yl) acetamidocephalosporanic acid and 7β-[5-(Substituted)-4-phenyl-1.2.4-triazol2-yl]thioacetamidocephalosporanic acid were synthesized and tested in vitro antimicrobial activity. These compounds exhibited good antimicrobial activity against Gram-positive bacteria whereas most compounds showed decreased antimicrobial activity against Gram-negative bacteria

대구지역의 대기오염도 특성평가(Ⅱ) : 대기질 변수의 시간별 변동을 중심으로 Hourly variations of air quality parameters

백성옥,최진수,황승만 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1

요약문본 연구에서는 과거 7년간의 실측자료를 이용하여 대구지역 주요 대기오염물질에 대 한 대기오염도 분석 및 광화학스모그 기간중의 대기질 평가는 물론 대기오염도 해석에 지배 적인 영향을 미치는 기상자료를 이용하여 대구지역의 시정감쇄 요인분석 및 풍향, 풍속과 대기안정도를 분석하였다. 주요 대기오염물질의 일주 시간대별 농도변화는 아황산가스와 분 진의 경우 오전 8~10시경과 오후 4시경에 각각 최고, 최저농도를 나타내였고 이산화질소는 오전·오후의 교통량증가와 기상인자의 복합적인 영향으로 두차례의 최고농도를 나타냈다. 일산화탄소는 시간 환경기준치에 크게 못미치는 수준으로 동절기와 하절기의 시간별 농도변 화 양상이 서로 상이하게 나타났으며 오존은 일사량이 증가하기 시작하는 오전 10시경으로 나타났다. 또한 대구지역 오존농도의 발생빈도는 최근(1993~1994)으로 올수록 증가하는 경향 을 보였으며 오존농도와 그 영향인자와의 상관성 역시 일사량과 이산화질소가 가장 중요변 수임이 증명되었다. 최근 6년간의 기상자료를 분석한 결과 시정거리는 가을철이 월편균 17~20km 정도로 가장 좋았으며 풍향, 풍속 및 대기안정도는 서북서풍이 연중 14.0%, 2m/sec 이하의 저풍속이 전체의 36.5%, 중립조건인 D등급이 전체의 48.1%로 각각 나타나 대구지역이 대기오염의 확산에 불리한 조건임을 시사하고 있다.AbstractWith empirical data obtained for last 7 years, this study was conducted to analyze major pollutants and to evaluate the air quality of Taegu during the period of photochemical smog. In addition to this, causes of visibility reduction in Taegu, wind speed, wind direction and atmospheric stability were also analyzed. In terms of the variation of concentration for each pollutant by time during daytime, the highest concentration of SOz and partic ulates was measured at around 8~10 o'clock, and the lowest concentration of those pollutants was found at approximately 15~16 o'clock.In the case of NO;, due to the traffic and complex atmospheric conditions, the highest concentration was measured twice a day. The concentration of CO was much less than the atmospheric standard. The difference in the variation of CO concentration with respect to time was found between summer and winter. Ozone concentration increased with surging amount of insolation and the highest level of ozone was presented at between 15 and 16 o'clock with no respect to season. High concentration of ozone was observed much more requently in last 2 years (1993~1994) and it is verified that the insolation and NOz were main sources to be highly related to ozone concentration. As the result of investigation of meteorological data obtained for last 7 years, the highest visibility (17~20 km) was found in autumn as the monthly average value. As conclusion, the analyzed data-base indicated that it is difficult to spread air pollutants out of metropolitan Taegu city because of low wind speed (lower than 2 m/s), wind direction (Northwest), and atmospheric stability (D).

대구지역 실내 외 공기중 주요 대기오염물질의 농도조사에 관한 연구

최진수,백성옥,김영민,박상곤,정점희,황승만 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1

최근 현대인의 실내거주시간이 일상생활시간의 80% 이상을 차지할 정도로 크게 증가하면서 보건·위생학적 측면에서 실내공기질은 매우 중요한 관심사로 등장하게 되었다. 본 연구는 1994년 8월의 여름철과 1994년 12월 ∼1995년 1월의 겨울철에 대구를 중심으로 가정집, 사무실, 식당과 같은 3가지 유형의 일반주거환경 중 실내·외 공기를 대상으로 실행되었다. 측정항목으로는 RSP, CO, CO₂, NO₂등의 주요 기준성 오염물질과 Bioaerosol을 선정하였다. 본 연구의 결과, 각 성분대상물질의 실내·외 농도는 실내거주환경 및 여름과 겨울, 두 계절에 따라 영향을 받는 것으로 나타났으며 실내·외 농도비교에서 RSP, CO, CO₂의 실내농도는 대부분의 지역에서 실외에 비하여 높은 농도를 나타냈다. 각 실내거주환경에 따른 실내·외의 농도는 가정, 사무실에 비하여 식당에서 상대적으로 높은 농도를 나타냈으며 실내·외 농도비 또한 식당에서 상대적으로 큰 값을 나타냈다. 여름과 겨울의 두 계절에 따른 RSP, CO, CO₂의 실내·외 농도는 여름철에 비하여 겨울철에 더욱 높은 농도를 나타냈으나 Bioaerosol의 실내·외 colony/plate는 여름철에 더욱 높은 수치를 나타냈다. The study was carried out to investigate the concentrations of indoor air pollutants such as respirable suspended particulate (RSP), carbon monoxide (CO), carbon dioxide (CO₂), nitrogen dioxide (NO₂) and bioaerosol at homes, offices and restaurants in Taegu city. Indoor and outdoor concentrations of these pollutants were observed simultaneously from August 1994 for summer to January 1995 for winter. The results were summarized as follows : 1. Both in summer and in winter, the indoor concentrations of RSP, CO, and CO₂; were higher than the outdoor concentrations, the indoor concentrations of major air pollutants (RSP, CO, CO₂, NO₂) in restaurants were higher than those in homes and offices. 2. The indoor and outdoor concentrations of RSP, CO, and CO₂; in winter were significantly higher than those in summer, on the other hand. The CFU/plate of bioaerosol in winter was lower than that in summer. These results suggested that indoor levels of air pollutants were affected by various indoor characteristics such as smoking, cooking, ventilation rate, winter heating systems, and behavioral activity of occupants.

복수 해상도 구순문 인식에 관한 연구

김진옥,황대준 成均館大學校 科學技術硏究所 2001 論文集 Vol.52 No.2

This paper presents a lip print recognition by pattern kernels for a person identification. A lip print recognition has been developed less than the other human physical attributes of a fingerprint, a voice pattern, a retinal blood/vessel pattern, or a facial recognition. The merit of a lip print recognition by CCTV camera is linked with other recognition systems such as retinal/iris eye and face. A new method with multi-resolution architecture is proposed to recognize a lip print by the pattern kernels. A set of the pattern kernels is a function of some local lip print pattern masks. This function converts the information on a lip print into the digital data. The recognition in the multi-resolution system is more reliable than recognition in the single resolution system. The results show that the proposed algorithm by the multi-resolution architecture can be efficiently realized.

대구지역의 대기오염도 특성평가(I) : 지역별 및 계절별 농도변동을 중심으로 Locational and Seasonal variations

백성옥,최진수,황승만,김광은 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.15 No.2

본 연구는 대구지방환경관리청과 유관기관 등에서 과거 7년간(1988~1994년) 측정한 대기질 관련자료중 아황산가스, 분진, 일산화탄소, 질소산화물 및 오존을 대상으로 통계분석하여 각기 배출강도가 다른 지역별 농도분포 특성을 평가하였고 대구지역의 전반적인 대기질 변화추이를 파악하였다. 그 결과 각 지점별 아황산가스의 농도는 전형적인 동고하저형을 나타내었으며, 도시가스공급과 황함량규제등 연료변환 정책의 효과로 인해 점차적으로 감소하고 있는 추세를 보이고 있다. 부유분진은 결측치가 많아 장기적인 농도변화추이를 판단하기는 어려웠으나 아황산가스와 같이 큰 계절적인 변동은 보이지 않았다. 질소산화물의 전반적인 농도분포는 장기 환경기준치 50ppb를 초과하지 않는 수준이었으나 최근엔 이동배출원의 영향이 가중되어 그 농도가 꾸준히 증가하는 추세인 반면 동고하저형의 계절적인 변동을 나타내는 일산화탄소는 가정용 무연탄 사용량의 감소로 대기중 일산화탄소의 농도는 점점 감소하고 있는 추세이다. 오존은 전반적으로 일사량이 많은 하절기에 농도가 높았고 동절기에는 농도가 낮은 경향을 보였다. 한편 주요 대기오염물질의 장·단기 기준달성도를 비교분석한 결과 대구지역의 대기오염물질중 아황산가스의 고농도 발생빈도는 공업지역에 집중되어 있었으며 질소산화물과 일산화탄소는 아직은 장·단기 환경기준을 초과하지 않는 수준으로 나타났고, 분진과 오존의 경우는 공업지역 뿐만 아니라 전지역에서 그 발생빈도가 유사하게 나타났다. In this study, characteristics and distributional patterns of the concentrations of air pollutants in Taegu area were evaluated using a data-base established from the ambient air quality monitoring stations for the period of 1989 to 1994. The result of this study demonstrated that in each sampling site, the SO_2 concentrations were much higher in winter than those in summer. However, a decreasing tendency was clearly shown in the annual variation of SO_2 concentrations, largely due to the use of LPG instead of anthracite coal for local heating systems and to the fuel policy of using lower sulfur content fuel in industrial sectors. Unlike SO_2, there was no distinct seasonal variation in the concentrations of suspended particulate matter. Concentrations of NO_x were found to be generally lower than the long term ambient air quality standard (50 ppb). The NO_x concentration has been gradually increased, reflecting the rapidly increased number of vehicles In this area, while the CO levels In ambient air were declind because of the reduced use of coal for domestic purposes. The Ozone concentrations in Taegu area exhibited that there has been already photochemical smog phenomena during the summer season when the insolation is strong.

멀티미디어 데이터 전송 시 강건한 오류 내성 기법을 적용한 오류 은닉

김진옥,황대준 成均館大學校 科學技術硏究所 2002 論文集 Vol.53 No.2

In network delivery of compressed video, packets may be lost if the channel is unreliable. Such losses tend to occur in burst. In this paper, a temporal and spatial error resilient video encoding approach is developed to facilitate the error concealment at the decoder against burst errors. Block interleaving scheme is introduced to isolate erroneous blocks caused by packet losses for spatial area of error concealment. Data hiding is applied to add protection parity bits for motion vectors between intra frames or continuous inter frames for temporal area of error concealment. Since bidirection interpolation for error concealment is adapted to error blocks at decoder, error occurred during the transmission are concealed fast and properly. In this study, data hiding is used to reduce a complexity of error concealment at the decoder. A set of feature are extracted at the encoder and embedded imperceptibly into the host media. If some part of the media data is damaged during transmission, the embedded features can be extracted and used for recovery of lost data. Experimental results suggest that our approach can achieve a reasonable quality for packet loss up to 30% over a wide range of video materials.

Rebounder 運動負荷後 恢復期의 心肺機能의 變化

裵玉錫,黃樹寬,金亨鎭,朱永恩 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2

20∼22歲의 男子大學生 61名을 硏究對象으로 하여 選手群(21名)과 非選手群(40名)으로 區分하였다 運動負荷는 rebouner에 垂直뛰기를 一分間에 80回程度로 3分동안 實施했으며, 運動後 恢復期 1, 3, 5, 10 및 20分에서 心搏數, 血壓, 呼吸數의 恢復樣相을 觀察하였다. 이로써 체력단속이 恢復期의 心肺機能에 미치는 影響을 分析하고 나아가서 恢復期의 心肺反應이 體力을 評價하는 指標가 될 것인가를 알고자 試圖한 本 硏究結果를 要約하면 다음과 같다. 安靜狀態의 心搏數는 選手群이 非選手群에 比해서 有意하게 낮았으며 血壓 및 呼吸數는 別 差異가 없었다. 運動負荷後 心搏數의 恢復은 選手群은 恢復 1分에 86.4±3.22回로서 非選手群의 118.0±2.81回에 比해 有意하게 낮았고, 兩群 모두 恢復初期에는 急速한 恢復을 보였으며 選手群이 非選手群에 比해 繼續有意하게 낮은 값으로 빠른 速度로 恢復되었다. 運動負荷後 收縮期血壓의 恢復樣相은 選手群이 非選手群보다 繼續 낮은 값으로 恢復되었으며, 特히 恢復 1分에 選手群은 161.2±1.78mmHg로 非選手群의 174.1±3.41mmHg에 比해 有意하게 낮았다. 兩群 모두 恢復初期에 急速히 恢復하여 恢復10分에는 安靜狀態로 恢復되었다. 그리고, 擴張期血壓은 非選手群은 期動後 安靜狀態보다 有意하게 높았으며, 選手群은 오히려 安靜狀態보다 낮았다. 平均動脈壓은 恢復初期에 選手群이 非選手群보다 높은 값으로 恢復되었으나 恢復10分부터는 거의 같은 값으로 恢復되었다. 脈壓은 選手群이 非選手群에 比해 繼續 有意하게 낮은 값으로 恢復되었다. 運動負荷後 呼吸數는 恢復 1分에 選手群에서는 27.1±1.23回로 非選手群의 35.5±1.17回에 比해 有意하게 낮았고, 兩群 모두 恢復 1,3分에 急速히 恢復되었으며, 選手群이 非選手群에 比해 繼續 有意하게 낮은 값으로 恢復되었다. 本硏究結果를 綜合하면 rebounder 運動負荷後 選手群의 心搏數, 血壓 및 呼吸數가 非選手群에 比해 有意하게 낮았으며, 그 恢復速度도 빨랐다. 특히 心搏數는 選手群과 非選手群 사이에 恢復初期부터 恢復 20分까지 繼續 有意한 差異를 나타낸 점은 體力을 客觀的으로 評價하는 重要한 資料가 될 것으로 思料되는 바이다. Sixty-one male subjects aged between 20-22 years were divided into the athletic and non-athletic groups. Exercise was performed as vertical jump on a rebounder at 80 times per min for 3min. The heart rate, blood pressure, and respiratory rate were measured at 1, 3, 5, 10, and 20min after exercise in an effort to analyze the effect of the physical training on the cardiopulmonary function during the recovery period, and to find out if the cardiopulmonary responses during recovery period can be an index of physical fitness. The results are summarized as follows. In resting state, the heart rate was significantly lower in athletes than in non-athletes, while blood pressure and respiratory rate showed no significant difference between the two groups. The heart rate at 1min after the exercise was 86.4±3.22 in athletes which was significantly lower than 118.5±7.85 in non-athletes. The heart rate at the initial stage after exercise showed a rapid recovery in both groups. In athletes, it showed a rapid recovery to reach a significantly lower level than that of non-athletes. The systolic pressure was lower in athletes than in non-athletes throughout the recovery period. In particular, systolic pressure at 1min after the exercise was 161.2±1.78 mmHg in athletes which was significantly lower than 174.1±3.41mmHg in non-athletes. Systolic pressure at initial stage after the exercise showed a rapid recovery, and the resting value was retored in 10 min in both groups. Diastolic pressure during the recovery period was significantly higher in non-athletes and lower in athletes than the resting level.

클러스터 인덱싱 구조 기반의 이미지 데이타 검색 연구

김진옥,황대준 成均館大學校 科學技術硏究所 2002 論文集 Vol.53 No.1

As the method of searching multimedia data, similarity retrieval has been studied to retrieve automatically basic features of multimedia data and to make search among data with retrieved features because exact match is not adaptable to matrix or vector format presentation of features of multimedia. In this study, we propose data clustering and indexing approach as speedy similarity retrieval method of multimedia data. This approach clusters similar images on adjacent disk cylinders and then builds indexes to access the clusters made. To minimize the search cost, the hashing is adapted to index cluster of this approach. In addition, to reduce I/O time, the proposed searching takes just one I/O to look up the location of the cluster containing similar object and one sequential file I/O to read in this cluster. The proposed schema that uses clustering making algorithm and hashing index simultaneously is shown higher search efficiency than VQ that uses just clustering.