Thermal Resistance Characteristics of Bacillus cereus, Escherichia coli O157:H7, and Listeria monocytogenes in a Multi-grain Soy Milk Product

김남희,구재명,이민석,Kim, Nam Hee,Koo, Jae Myung,Rhee, Min Suk Korean Society of Food Science and Technology 2015 한국식품과학회지 Vol.47 No.5

This study determined the thermal resistance of Bacillus cereus, Escherichia coli O157:H7, and Listeria monocytogenes in multi-grain soymilk and proposes processing conditions that meet the national standard for retort food products in Korea. D and z values were calculated from thermal inactivation kinetic curves after heating at 55, 60, and $65^{\circ}C$. The D value for B. cereus at $55^{\circ}C$ was the highest (22.8 min), followed by that for E. coli O157:H7 (18.8 min) and L. monocytogenes (17.6 min). At $60-65^{\circ}C$, the order was L. monocytogenes ($D_{60-65^{\circ}C}=3.4-0.9min$), E. coli O157:H7 (3.0-0.3 min), and B. cereus (1.2-0.3 min). The z values for these species were 5.2, 5.5, and $7.7^{\circ}C$, respectively. The Korean national standard for retort food products was achieved by thermal processing at $124{\pm}2^{\circ}C$ for 0.3-2.2 min. This study provides useful data for ensuring both the microbiological safety and product quality of multi-grain soymilk products.

고온가열처리에 의한 바다방석고둥 ( Omphalius pfeifferi capenteri ) 의 식품성분 변화

하진환(Jin Hwan Ha),송대진(Dae Jin Song),김풍호(Poong Ho Kim),허민수(Min Soo Heu),조문래(Moon Lae Cho),심효도(Hyo Do Sim),김혜숙(Hey Suk Kim),김진수(Jin Soo Kim) 한국수산과학회 2002 한국수산과학회지 Vol.35 No.2

바다방석고둥을 원료로 한 신제품 개발에 관한 일련의 기초 연구로 저장성 부여를 위하여 시도하는 고온가열처리 조건 (F_0 5분, F_0 10분, F_0 15분 및 F_0 20분)에 따른 바다방석고둥의 성분변화에 대하여 살펴보았다. 바다방석고둥 통조림은 살균을 5분 이상 처리하는 경우 저장 중 팽창관이 발생하지 않았고, 또한 생균수가 검출되지 않아 저장성이 있었다. 고온가열처리 정도가 증가할수록 바다방석고둥의 일반성분 중 수분함량은 감소하였고, 조단백질 함량은 증가하였으며, 조지방 및 조회분 함량은 거의 변화가 없었다. 또한 바다방석 통조림은 고온가열처리 정도가 증가할수록 이취에 관여하는 휘발성염기질소 함량, pH와 색조에 관여하는 갈변도는 증가하였고, 영양에 관여하는 구성아미노산, 무기질과 맛에 관여하는 유리아미노산, TMAO, total creatinine 및 수율 둥은 감소하였다. 이들을 색조, 조직감 및 맛에 대하여 관능검사한 결과 자숙 처리한 시료에 비하여 모든 항목에서 F_0 10분까지는 차이가 없었으나, 그 이상 가열처리한 경우 품질이 저하하였다고 인지되었다. 이상의 결과로 미루어 보아 바다방석고둥을 고온가열처리하여 신제품을 개발하고자 하는 경우 F_0 값이 10분 이상이면 바람직하지 않은 것으로 판단되었다. The top shell, Omphalius pfeifferi capenteri meat vacuum-packed in can (diameter× height, 74.1 ㎜ × 50.7 ㎜) were heated at 115℃ up to F_0 values of 5 min, 10 min, 15 min and 20 min, and the changes in food components were studied. After 14 days storage at 37℃ and 55℃, no growth of microorganism and panelling were recognized from the canned meats which were sterlized at 115℃ with F_0 value of 5 min and over. In the case of proximate composition of the canned meats, the moisture content decreased with the increase of F_0 value, while crude protein increased. The increase of volatile basic nitrogen content, pH and degree of browning and the decrease of mineral, total amino acid, free amino add, trimethylamine oxide, total creatinine contents and yields were observed during thermal processing. In sensory evaluation on color, texture and taste in the canned meats, no significant difference was observed among a boiled sample and the canned meats heated at F_0 value of 10 min and below. But, in the canned meats heated at F_0 value of over 15 min, its sensory scores decreased with the increase of F_0 value. From these results, the reasonable F_0 value for preparation of the heat-treated top shell meats was in the range of 5∼10 min.

요관압 상승시 신혈류량 조절에 prostaglandin이 미치는 효과

민영기,양훈모,김종규,이석호 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Higher ureteral pressure than in normal condition causes increase in renal blood flow (RBF) and partial impairment of the autoregulation of RBF. Higher ureteral pressure increased renal prostaglandin production, it is not clear whether or not it is also responsible for partial impairment of the autoregulation of RBF. Therefore, we investigated the role which prostaglandin play in the autoregulation of RBF, studying the interaction between ureteral pressure and RBF autoregulation may reveal the role of prostaglandin in tubuloglomerular feedback. For the purpose of this experiment, six anesthetized mongrel dogs were prepared for the measurements of RBF, mean systemic and renal arterial pressure (RAP) and the manipulation of ureteral pressure to 0 cmH20, 20 cmH20 and 40 cmH20. The autoregulation curves were determined during both control and elevation of the ureteral pressure, before and after the pretreatment with indomethacin, a cyclooxygenase inhibitor. The desired ureteral pressure was achieved by vertically elevating the water-filled reservoir connected to the ureteral catheter to 20 cm and 40 cm above the kidney level. In response to the elevation of the ureteral pressure, RBF increased from 167±11 ml/min to 185±8 ml/min, 204±11 ml/min respectively and the renal arterial pressure and the systemic arterial pressure didn't change significantly. During 0 mmHg of ureteral presure threshold pressure of RBF autoregulation was 59±3 mmHg. On the other hand, during 20 cmH20, 40 cmH20 of ureteral pressure, the autoregulation curves shifted upward and rightward from control, threshold pressure is elevated by 74±3 mmHg. The pretreatment of the dogs with indomethacin failed to affect the lower limit of RBF autoregulation during both control (63±5 mmHg) and the elevated ureteral pressure (77±5 mmHg). Since RBF failed to increase in response to the elevated ureteral pressure, RBF autoregulation curves obtained during the elevated ureteral pressure shifted only rightward from indomethacin control. The results indicate that the increased intrarenal level of prostaglandin by increased ureteral pressure or prostaglandin-induced vasodilation does not appear to bear any relation to the reduction in the autoregulatore capacity during elevated ureteral pressure. It seems that the partial impairment of the autoregulation during acute ureteral obstruction is due to the consumption of tubuloglomerular feedback mechanism at 0 mmHg of ureteral pressure and that prostaglandin is neither mediator nor effector of tubuloglomerular feedback mechanism.

농촌병원과 도시 종합병원 외래환자의 수진행동에 관한 비교연구

민현옥,이종숙 中央醫學社 1993 中央醫學 Vol.58 No.11

In order to know the sick role behavior of outpatients who visiting the Hospitals in City and Rural, this questionnaire survey was conducted from Dec, 1990 to Feb, 1991 in the five selected hospitals; 3 general hospitals in Taejeon City al d 2 general hospitals in Chungnam provincial for 876 outpatients. The major findings of this survey were as follows: 1. A total of 49.3 % of the study population were male and female were 50.7 % and average age were 40.14 years old. 2. The average time spent on diagnosis and treatment in hospitals was 138.6 minutes, the spent times were longer in hospitals in city than one in Rural area. 3. The average time spent on diagnosis and treatments by departments was 168.7 min. in internal medicine, 136.1 min. in orthopedic surgery, 104.4 min. in obstetrics and gynecology, 86.8 min. in general surgery, 81.4 min. in pediatrics. 4. The previous medical facility from which patients were transport were 37.2 % in clinic, 16.4 % in hospital, 4.2 % in health center and subcenter and 38.8 % in no transfarted medical facility. 5. The Routes of hospital choice were 30.9 % in patients' own first choice, 35.8 in transferred from other facility on patients' own decision, 26.5 % in recommended by other medical facility. 6. The reasons of hospital choice were 32.1 % in previous experience and familiarity, 26.6 % in bad treatments in previous hospitals, 28.0 % in good facility and equipment. 7. The dissatisfaction against currently treating hospital were 58.9 % in long waiting time, 16.4 % in insufficient explanation of disease, 16.5 % in unkindness, 13.4 % in diagnosis time is too short, 26.6 % in no dissatisfaction. 8. The attitude on medical care delivery system were 34.8 % in acceptable, 23.4 % in not acceptable, 36.5 % in don't know.

NURB 곡선을 이용한 GIS 도체표면의 전계최적화

민석원,박은서 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.2

This paper aims at the design of 170 kV GIS conductor surface under a certain specified field condition by using NURB curves. We used 170 kV GIS model as initial shape and selected the reference electric field on the GIS conductor surface as 1.2 kV/min which was middle between average value and maximum value on it. We found the maximum electric field on conductor surface was 1.25kV/min and other parts was converged in 1.2 kV/min when we optimized the total part of 170 kV GIS conductor surface by using two shape variables.

A Colorimetric Microplate Assay Method for High Throughput Analysis of Lipase Activity

Choi, Suk-Jung,Hwang, Jung Min,Kim, Sung Il 한국생화학분자생물학회 2003 BMB Reports Vol.36 No.4

The present work describes a colorimetric microplate assay for lipase activity based on the reaction between 5,5'-dithiobis(2-mitro benzoic acid)(DTNB) and the hydrolysis product of 2,3-dimercapto-1-propanol tributyrate (DMPTB). Reaction mixtures containing DTNB, DMPTB, and lipase were prepared in microplate wells, and the absorbance at 405nm was recorded after incubation at 37℃ for 30 min. A linear relationship was obtained in the range of 0.1-1 U of lipase activity by this method. The reaction conditions were also optimized for the range of 0.01-0.1 U or 1-10 U. When assaying crude tissue extracts, the reaction of DTNB with non-specific reducing agents created a major source of error. However, this error was corrected by the use of blank samples that did not contain DMPTB.

A Colorimetric Microplate Assay Method for High Throughput Analysis of Lipase Activity

Choi, Suk-Jung,Hwang, Jung-Min,Kim, Sung-Il Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.4

The present work describes a colorimetric microplate assay for lipase activity based on the reaction between 5,5'-dithiobis(2-nitro benzoic acid) (DTNB) and the hydrolysis product of 2,3-dimercapto-1-propanol tributyrate (DMPTB). Reaction mixtures containing DTNB, DMPTB, and lipase were prepared in microplate wells, and the absorbance at 405nm was recorded after incubation at $37^{\circ}C$ for 30 min. A linear relationship was obtained in the range of 0.1-1 U of lipase activity by this method. The reaction conditions were also optimized for the range of 0.01-0.1 U or 1-10 U. When assaying crude tissue extracts, the reaction of DTNB with non-specific reducing agents created a major source of error. However, this error was corrected by the use of blank samples that did not contain DMPTB.

Effect of energy drink dose on exercise capacity, heart rate recovery and heart rate variability after high-intensity exercise

( Sang Min An ),( Jong Suk Park ),( Sang Ho Kim ) 한국운동영양학회 2014 Physical Activity and Nutrition (Phys Act Nutr) Vol.18 No.1

[Purpose] The purpose of this research was to investigate the effects of exercise capacity, heart rate recovery and heart rate variability after high-intensity exercise on caffeine concentration of energy drink. [Methods] The volunteers for this study were 15 male university student. 15 subjects were taken basic physical examinations such as height, weight and BMI before the experiment. Primary tests were examined of V˙ O2max per weight of each subjects by graded exercise test using Bruce protocol. Each of five subject was divided 3 groups (CON, ECGⅠ, ECGⅡ) by matched method based on weight and V˙ O2max per weight what gained of primary test for minimize the differences of exercise capacity and ingestion of each groups. For the secondary tests, the groups of subjects were taken their materials before and after exercise as a blind test. After the ingestion, subjects were experimented on exercise test of V˙ O2max 80% by treadmill until the all-out. Heart rate was measured by 1minute interval, and respiratory variables were analyzed VO2, VE, VT, RR and so on by automatic respiratory analyzer. And exercise exhaustion time was determined by stopwatch. Moreover, HRV was measured after exercise and recovery 3 min. [Results] Among the intake groups, ECGⅡ was showed the longest of exercise exhaustion time more than CON group (p = .05). Result of heart rate during exercise according to intake groups, there was significant differences of each time (p < .001), however, not significant differences of each groups and group verse time (p > .05). Result of RPE during exercise according to intake groups, there was significant differences of each time (p < .001), however, not significant differences of each groups and group verse time (p > .05). [Conclusion] In conclusion, EDGⅡ showed the significant increase of exercise exhaustion time more than CON group (p=.05) and not significant differences in HR, RPE, RER, HRV, HRR, blood pressure (p > .05). Therefore, 2.5 mg/kg-1 ingestion of energy drink might be positive effect to increase exercise performance capacity without side-effect in cardiovascular disease.

Antibacterial Effect and Deodorization Effect of Extracts from Different Parts of Zingiber officinale

Young Suk Lee,Young Ju Kang,Min Jeong Ryu 한국피부과학연구원 2020 아시안뷰티화장품학술지 Vol.18 No.4

목적: 생강 부위별 추출물의 피부 상재균에 대한 항균효과 및 암모니아에 대하 소취능을 평가하여 항균소재 및 기능성 향장품 소재 로서의 가능성을 예측하고자 한다. 방법: 피부 상재균에 대한 항균효과는 paper disc 방법으로 측정하였다. 소취효과 측정은 암모 니아 가스 제거 실험을 하였다. 결과: 생강 부위별(잎, 줄기, 뿌리) 추출물 항균효과 측정 결과 S. aureus에 대한 항균효과는 5 mg/ mL 농도에서 각각 3 mm, 3 mm, 2 mm의 clear zone이 확인되었다. S. epidermidis에 대한 항균효과는 각각 8 mm, 5 mm, 4 mm 의 clear zone이 확인되었다. 여드름의 원인균인 P. acnes에서는 각각 4 mm, 3 mm, 1 mm의 clear zone이 확인되었다. P. ovale에 서는 각각 6 mm, 5 mm, 4 mm의 clear zone이 확인되었다. M. furfur에서는 각각 4 mm, 3 mm, 2 mm의 clear zone이 확인되었다. C. albicans에서는 각각 4 mm, 3 mm, 2 mm의 clear zone이 확인되었다. 마지막으로 T. mentagrophytes에 대한 항균효과를 측정 한 결과 5 mg/mL 농도에서 생강 잎 추출물은 6 mm, 줄기 추출물은 4 mm, 뿌리 추출물은 3 mm의 clear zone이 확인되었다. 암모 니아에 대한 소취효과를 측정한 결과 120 min에는 생강 잎 추출물은 98%, 줄기 추출물은 95%, 뿌리 추출물은 91%의 소취효과가 확인되었다. 결론: 생강 부위별 추출물 중 잎 추출물이 7종의 피부상재균에 대한 항균효과도 가장 우수하였으며, 소취효과도 생강 잎 추출물이 가장 높은 효과가 확인되어 항균소재 및 기능성 향장품 소재로서의 가능성을 확인하였다. Purpose: Using extracts from different parts of Zingiber officinale , we aimed to evaluate its antibacterial effect on skin flora and its deodorization effect on ammonia to determine its potential as an antimicrobial ingredient and functional herbal cosmetic ingredient. Methods: The antibacterial effect on skin flora was examined using the paper disc method and the deodorization effect on ammonia was examined by the gas detection method. Results: After evaluating the antibacterial effects of extracts from different parts (leaves, stems, and roots) of Zingiber officinale , antibacterial activity was observed against Staphylococcus aureus (S. aureus ) at a concentration of 5 mg/mL. The leaf, stem, and root extracts had 3 mm, 3 mm, and 2mm clear zones, respectively. For the antibacterial effect against Staphylococcus epidermidis (S. epidermidis ), there were 8 mm, 5 mm, and 4mm clear zones for the leaf, stem, and root extracts, respectively. For Propionibacterium acnes (P. acnes ), a bacterium that causes acne, there were 4 mm, 3 mm, and 1mm clear zones for the leaf, stem, and root extracts, respectively. The results for Pityrosporum ovale (P. ovale ) showed 6 mm, 5 mm, and 4 mm clear zones for the leaf, stem, and root extracts, respectively. For Malassezia furfur (M. furfu ), there were 4 mm, 3 mm, and 2 mm clear zones for the leaf, stem, and root extract, respectively. For Candida albicans (C. albicans ), there were 4 mm, 3 mm, and 2mm clear zones for the leaf, stem, and root extracts, respectively. Finally, after evaluating the antibacterial effect against Trichophyton mentagrophytes (T. mentagrophytes ) at a concentration of 5 mg/mL, we found 6 mm, 4 mm, and 3 mm clear zones for the leaf, stem, and root extracts, respectively. After evaluating the deodorization effects of Zingiber officinale extracts on ammonia, at 120 min, the deodorization effect was 98%, 95%, and 91% for the leaf, stem, and root extracts, respectively. Conclusion: Among the three extracts of Zingiber officinale , the leaf extract had the highest antibacterial effect against the seven types of skin flora as well as the highest deodorization effect, thus confirming its potential as an antibacterial ingredient and functional herbal cosmetic ingredient.

Effects of Supercritical Carbon Dioxide Treatment on Meat Quality and Sensory Evaluation in Soy Sauce and Hot-pepper Paste Marinated Pork

Young Min Choi,Sang Hoon Lee,Jee Hwan Choe,Kyoung Heon Kim,Min Suk Rhee,Byoung Chul Kim 한국축산식품학회 2013 한국축산식품학회지 Vol.33 No.5

The objective of this study was to investigate the effects of supercritical carbon dioxide (SC-CO2) treatment on meat quality and sensory evaluation of marinated pork. Meat marinated in two traditional Korean marinades, soy sauce and hot-pepper paste, and raw marinated meat were then treated with 7.4, 12.2, or 15.2 MPa CO2 at 31.1oC for 10 min. The SC-CO2 treatments had no effect on the meat pH (p>0.05) or Warner-Bratzler shear force (p>0.05). There was no significant difference (p>0.05) in the total loss (sum of treatment loss and cooking loss) between the control and SC-CO2 treated samples at 15.2 MPa (soy sauce marinated pork: 21.78 vs. 18.97%; hot-pepper marinated pork: 21.61 vs. 18.01%). After the SC-CO2 treatment, lighter surface colors were observed in the treatment samples compared to those of the control samples (p< 0.001). However, tasting panelists were unable to distinguish a difference in color or in overall acceptability of the control and treatment (p>0.05). In the case of soy sauce marinated pork, when SC-CO2 applied at 15.2 MPa and 31.1oC for 10 min, treatment samples showed a tenderer meat than the control samples. Therefore, the SC-CO2 treatment conditions had no adverse effects on the sensory quality characteristics of the marinated meat products.