• Preventive Nutrition and Food Science
• /
• 제16권1호
• /
• pp.89-94
• /
• 2011

The potential biological activities of water and ethanol extracts from two varieties of Rubus coreanus Miquel fruits produced in the Gochang-gun (GR) and Hoengseong-gun (HR) regions of Korea were examined. The hydroxyl radical ($\cdot$OH) scavenging activity, reducing power, lipid peroxidation inhibitory activity, and antiproliferative activity on cancer cells by these extracts were examined, and $\alpha$-amylase and $\alpha$-glucosidase inhibition assays were also performed. The EtOH extract from GR showed high hydroxyl radical scavenging activity ($EC_{50}=119.47{\pm}5.13\;{\mu}g/mL$), lipid peroxidation inhibitory activity ($EC_{50}=213.45{\pm}3.14\;{\mu}g/mL$) and a concentration dependence, with OD values ranging from 0.15 to 0.56 (50 to 200 ${\mu}g/mL$), for reducing power. The EtOH extract from GR has the highest antiproliferative activities on MDA-MB-231 and HepG2 cancer cells among four extracts. Meanwhile, all extracts showed certain $\alpha$-amylase and $\alpha$-glucosidase inhibition activities. These results indicate that extracts from two varieties of R. coreanus fruits have significant antioxidant, anti-diabetic and anti-tumorigenic activities, which suggest these extracts could be a potential source for pharmaceutical.

• Applied Biological Chemistry
• /
• 제39권6호
• /
• pp.419-423
• /
• 1996

SOS chromotest 방법을 이용하여 천연물에 포함된 항변이원성 물질의 활성을 정량화 할 수 있는 항변이원 활성단위 측정법을 개발하였다. 이 방법에 의하여 시료의 항변이원 활성을 특정 화학적 변이원이 유도하는 변이원성이 표준측정 조건하에서 50% 억제되는 시료의 양으로 수치화하는 것이 가능하게 되었다. 확립된 방법으로 쌀의 품종별 항변이원 활성 및 기타 곡류의 항변이원 활성을 조사하였다. 그 결과 변이품종 쌀인 자도와 향도가 취반용으로 사용되는 추청보다 항변이원 활성이 높았고, 일반적으로 검정콩이나 팥과 같은 잡곡의 항변이원 활성이 현미보다 높았다.

• Journal of Korean Biological Nursing Science
• /
• 제10권1호
• /
• pp.1-10
• /
• 2008

Purpose: The purpose of this study was to investigate the cerebral infarction size, antioxidant enzyme activities and lipid peroxidation changes after 6 weeks of dietary soybean protein intake in a rat focal brain ischemia model. Method: Weaning Sprague-Dawley rats were fed with either modified AIN-93G diet containing casein 20% (control), 20% soybean protein isolate-based diet (S20), or 40% of soybean protein isolate-based diet (S40) for 6 weeks. The animals were subject to right middle cerebral artery occlusion for 2 hr. After 24 hr of recirculation, the rats were sacrificed. Antioxidant enzymes activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) and thiobarbituric acid reactive substance (TBARS) level in the right brain were also measured. Result: There were no significant differences in the right cortical infarction volume, TBARS level, SOD and CAT activities among the three groups whereas the GPx activities of the S20 group were significantly higher than those of the control group (p=.02). Conclusion: Our results suggest that 20% of soybean protein may have a modulating effect on GPx and possibly have some protective effect against oxidative stress although it may enough to decrease cerebral infarction volume in rat focal brain ischemia model.

• Natural Product Sciences
• /
• 제24권4호
• /
• pp.247-252
• /
• 2018

Halophytes are expected to possess abundant secondary metabolites and various biological activities because of habitat in extreme environments. In this study, we collected 14 halophytes (Asparagus oligoclonos, Calystegia soldanella, Carex pumila, Chenopodium glaucum, Elymus mollis, Glehnia littoralis, Limonium tetragonum, Messerschmidia sibirica, Rosa rugosa, Salsola komarovii, Spergularia marina, Suaeda glauca, Suaeda maritima, and Vitex rotundifolia) native to Korea and compared their total polyphenol contents, antioxidant and anti-inflammatory activities. The total polyphenol contents of R. rugosa (27.28%) and L. tetragonum (13.17%) were significantly higher than those of the other 12 halophytes and L. tetragonum, R. rugosa, and M. sibirica showed significantly greater antioxidant activities than the other 11 halophytes, as determined by DPPH (2,2-diphenyl-1-picrylhydrazyl). A. oligoclonos, E. mollis, and C. pumila showed significantly greater anti-inflammatory activities than the other 11, as determined by NO (Nitric oxide) and $PGE_2$ (Prostaglandin $E_2$) levels. In contrast, these three extracts had normal and low total polyphenol contents among the 14 halophytes. Consequently, the total polyphenol content in the 14 studied halophytes appeared to be related to antioxidant, but not anti-inflammatory activity levels.

• Journal of Korean Biological Nursing Science
• /
• 제26권1호
• /
• pp.60-69
• /
• 2024

Purpose: This descriptive research study attempted to determine how general hospital nurses' awareness of the importance of patient safety management and patient safety competency affected patient safety management activities. Methods: From September 13 to 26, 2022, a survey was administered to 230 ward nurses who provided direct care to patients at five non-accredited general hospitals being evaluated for accreditation located in metropolitan cities. The collected data were analyzed with descriptive statistics, the t-test, one-way analysis, the Scheffé test, Pearson correlation coefficients, and hierarchical regression using SPSS for Windows version 26.0. Results: In total, 221 (96.1%) respondents were female. The average age was 32.2 years, and the average clinical experience was 3.5 years; 196 participants (85.2%) were general nurses. Patient safety competency (β = .44, p < .001), awareness of the importance of safety management (β = .31, p < .001), and medication error experience (β = -.15, p = .002) all had statistically significant associations with patient safety management activities. The explanatory power of these variables for patient safety management activities was 50.7%. Conclusion: This study confirmed that patient safety competency, awareness of the importance of patient safety management, and experience with medication errors significantly influenced patient safety management activities.

• Journal of Korean Biological Nursing Science
• /
• 제26권2호
• /
• pp.154-162
• /
• 2024

Purpose: This study investigated the performance of patient safety activities among hospital nurses and aimed to identify the factors influencing their performance of these activities. Methods: It employed a descriptive survey design, targeting 131 nurses currently working in hospitals. The data collection involved posting a guide to the study on an online social network for nurses (NURSECAPE) and recruiting nurses who understood the content and agreed to participate in the survey. The survey was conducted through a self-reporting method via a URL provided to research participants, and the data collection period was from August 11 to September 11, 2019. Results: The results revealed that 46.6% of the participants had experienced patient safety incidents, with falls being the most common. The factors influencing the performance of patient safety nursing activities among the participants were found to be the type of medical institution, community orientation, and environmental suitability in organizational health. These factors explained 38.5% of the variance. Conclusion: Based on these findings, it appears crucial to explore strategies for improving organizational health tailored to the characteristics of each hospital to facilitate better performance of patient safety activities among hospital nurses. Furthermore, subsequent studies are needed to objectively evaluate the adequacy of patient safety activity performance according to the size of the hospital.

• Asian-Australasian Journal of Animal Sciences
• /
• 제6권2호
• /
• pp.281-290
• /
• 1993

This experiment was designed to evaluate the effect of degree of unsaturation (Experiment 1) and the chain length of constituent fatty acids of dietary fats (Experiment 2) on-3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activities in the liver and small intestine of chicks. Chicks were fed experimental diets for 10 days and then killed for the determination of the HMG-CoA reductase activities in the intestinal epithelial cell and hepatic microsomes. The hepatic HMG-CoA reductase activity showed the highest value in chicks fed the tallow-containing diet. Chicks fed diets containing safflower or coconut oil resulted in a significantly lower intestinal HMG-CoA reductase activity in comparison with those fed the olive oil-containing diet. The hepatic HMG-CoA reductase activity was significantly higher when fat-free and trilaurin were fed than when any other triglycerides were fed. This activity showed the lowest value in the chicks fed the diet containing tristearin. The HMG-CoA reductase activities in the jejunum and ileum were significantly or tended to be higher when trilaurin was fed than when any other triglycerides were fed. Except when trilaurin was fed, the presence of saturated fat in the diet did not have a significant effect on the intestinal HMG-CoA reductase activity, unlike the effect shown when a highly unsaturated fat was added to the diet. There was no significant correlation between the HMG-CoA reductase activities of the liver and intestinal, and the HMG-CoA reductase activity and cholesterol content of the intestinal epithelial cells.

• 한국약용작물학회지
• /
• 제7권4호
• /
• pp.257-262
• /
• 1999

건지황과 숙지황의 에탄올 추출물에 대해 생리활성 실험을 하였는데 돌연변이 유발 억제실험에서는 MNNG의 돌연변이원성을 평가한 결과, 숙지황이 높은 억제활성을 나타내었다. 암세포 성장저해에서 건지황과 숙지황 모두 1 g/ l 의 농도에서 50%이상의 억제율을 보였고 특히, 숙지황은 1 g/ l에서 간암세포(Hep3B)의 성장을 61%까지 억제하였다. 또한 혈당강하 및 혈압조절(ACE활성저해)에서도 숙지황이 건지황보다 우수한 생리활성을 나타내 최고 농도(1 g/ l )에서 각각 63.69%, 56.58%의 억제율을 보였다.

• 한국균학회지
• /
• 제24권1호통권76호
• /
• pp.17-24
• /
• 1996

목재부후성 담자균류의 배양 균사체의 생물활성을 조사하기 위하여 항균활성, 식물생장조절활성, 항암활성 및 그들이 생산하는 효소활성을 검정한 결과 Coriozus versicolor 5129와 C. pubescens 5131 균주는 그람양성세균에, Lenzites betulina 8029 균주는 그람음성세균에 저지 효과를 나타내었으며 L. betulina 8085 균주는 세균과 진균에 저지 효과를 나타내어 광범위한 항균 spectrum을 보였다. 대부분의 균주가 0.8ml/ml 농도 처리시 배추 및 무의 발아 및 생장을 억제하였으며, 특히 Fomitopsis pinicolor 8059와 Fomitella fraxinea 8084 균주의 경우 생육을 장하게 억제하였다. 그러나, Bjerkandera adusta 8054 균주는 0.4 및 0.2ml/ml농도에서 배추 및 무의 생육을 촉진하였다. 몇종의 목재부후균 다당체를 추출하여 암세포를 이식한 ICR mouse에 투여한 결과 거의 전 균주가 항종양 작용을 나타내었으나 버섯종류 간에 큰 차이를 보였고 그중 L. betulina 8029와 미분류된 8058 균주는 효과가 비교적 높았다. 목재부후균의 세룰로스와 리그닌 분해력은 거의 전 공시균주에서 나타났고 종류간에 역가가 다양하여 강력한 분해균의 선발 가능성을 보였다.

• Journal of Applied Biological Chemistry
• /
• 제58권3호
• /
• pp.253-258
• /
• 2015

Xanthomonas oryzae pv. oryzae (Xoo), X. campestris pv. vesicatoria (Xcv), and Pectobacterium carotovorum pv. carotovorum (Pcc) are the causative agents of bacterial blight in rice, bacterial spot in pepper, and bacterial soft rot in carrot and cabbage, respectively. To isolate novel microbial extracts with antimicrobial activities against these bacteria, approximately 5,300 different Streptomyces extracts were prepared and tested. Microbial cultures from various Streptomyces strains isolated from the Jeju Island, Baekam, Mankyoung river, Jiri mountain etc. in Korea were extracted into three different factions -secreted hydrophobic, secreted hydrophilic, and mycelia- using ethyl acetate, water, and methanol. Initially, 34, 29, and 10 extracts were selected as having antibacterial activities against Xoo, Xcv, and Pcc, respectively. Extracts 1169G4, 1172E9, and 1172E10 had the highest growth inhibition activities against both Xoo and Xcv, and extracts 1151H7 and 1152H7 showed the highest growth inhibition activities against Pcc.