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Oil Contents and Fatty Acid Composition of Korean Perilla (Perilla ocimoides L.) Collections
Hong,Seong-Taek,Son,Suk-Yeong,Jong,Seung-keun,Rho,Chang-Woo,Yun,Jong-Sun 한국자원식물학회 2003 Plant Resources Vol.6 No.3
This study was carried out to obtain informations on the variations of oil content and fatty acid composition among 90 Korean perilla collections. Average oil content of 90 perilla collections was 44.2% with a range from 29.7% to 61.9%. Perilla collections with late-maturing, super-large seed and gray seed coat showed higher oil content than other types in general. Average saturated fatty acid content in perilla oil was 9.0% with a range from 8.2% to 10.7%, while average unsaturated fatty acid content varied from 89.3% to 91.8% with a mean of 91.0%. Contents of saturated and unsaturated fatty acids were not related to maturity. There were no differences in the contents of saturated and unsaturated fatty acids according to maturity. Linoleic acid and linolenic acid contents were the highest in the super large-sized group(15.5%) and in the large-sized seed group(61.4%), respectively, while contents of fatty acids among the perilla collections were variable with different seed coat colors. Most of the traits studied were not significantly correlated with oil content, but linoleic acid($\omega$ 수식 이미지-6) content was negatively correlated (r=-0.217*) with linolenic acid(ω-3) content.
홍석진,손재범,박근형 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.2
Since plant extracts have shown antibacterial activities, we hypothesized that herbal plant extracts would further increase cariostatic efficacies of the fluoride dentifrices.OBJECTIVE: The purposes of this study were to determine the minimum inhibitory concentration(MIC) of 9 different Korean herbal plants extracts on the S.sobrinus KCTC3308 and the efficacy of NaF-Silica dentifrices with or without the extracts. METHODS; The MIC of the methanol-extracts on the growth of S.sobrinus was determined. Subsurface caries lesions were prepared as previously described (Hong et al.J Dent Res. 77:843, 1998). After Vickers hardness number(VHN) were determined, the specimens were assigned to 9 test groups of 12 each by randornized blocks with VHN stratification. The specimens were tested for remineralization In vitro subsurface enamel lesion under cyclic microbial dynamic condition simulating in vivo carious fomation. The statistical significance of delta VHNs was determined by Students t-test and one-way ANOVA. RESULTS: The MIC of the Angelica gigas extract was 3 ㎎/㎖, as same as Akebia quinata and Camellia sinensis was 4 ㎎/㎖. However, all 9 extracts tested in the study demonstrated the synergistic cariostatic potential with known fluoride dentifrices. CONCLUSION: The NaF-herbal extract in silica base dentifrice significantly increased the cariostatic effect of NaF-Silica base dentifrice.
소비자의 인터넷쇼핑 구매경험과 기술준비성이 인터넷 의류쇼핑시 위험지각과 만족도에 미치는 영향
홍금희 한국의류산업학회 2004 한국의류산업학회지 Vol.6 No.1
The purpose of this study is to examine consumers' risk perception in internet clothing shopping and its relation with technology readiness and the frequency of purchase. Thereafter, this study examines how consumers' risk perception affect service quality and satisfaction at the apparel shopping sites, An on-line survey was made to collect data, and the replies from 785 people, who had an experience of apparel shopping on line, were used in data analysis. From factor analyses, risk perception comprised 3 factors of product related risk, delivery related risk, and security related risk, and technology readiness comprised 4 factors of optimism, innovativeness, discomfort, and insecurity. Based on cluster analysis, consumers were classified into 3 types in terms of the internet risk perception: low risk group, medium risk group, and high risk group. From path analysis, risk perception was decreased with high frequency of purchase and low discomfort and insecurity of technology readiness, and risk perception and service quality had an influence on consumers' satisfaction with the shopping sites.
3-Methylcholanthrene 투여와 성장과정이 흰쥐 간조직 microsomal cytochrome P-450 효소계에 미치는 영향
洪永淑,楊謹香 梨花女子大學校 韓國生活科學硏究院 1988 韓國生活科學硏究院 論叢 Vol.42 No.-
간조직 microsome내 약물대사 효소는 endoplasmic reticulum에 주로 존재하여 세포막과 결합되어 있고 여러 내인적(內因的) 물질과 외인적(外因的)물질 및 많은 다른 이물질 대사에 관여하는 전자전달계로서 작용한다. 또한 이 효소계에는 mixed function oxidase 또는 monooxygenase라 불리우는 중요한 효소군이 존재하며 이들 효소군에는 cytochrome P-450이라는 중요한 성분이 포함되어 있다. Cytochrome P-450은 이 효소계에서 기질과 산소의 결합장소이며 terminal oxidase로 작용한다. 본 실험에서는 3-Methylcholanthrene(3-MC)을 투여하였을 때와, 암컷과 숫컷의 신생, 미성숙 그리고 성숙 흰쥐에서 성별과 성장단계에 따른 micrsomal cytochrome P-450효소계의 활성도변화에 대하여 알고자 하였다. 암컷과 숫컷의 흰쥐 간조직에서 3-MC 투여와 성별 및 성장단계에 따른 cytochrome P-450, NADPH-cytochrome C reductase, cytochrome b_5, NADH-cytochrome C reductase, lipid peroxidation, p-nitroanisole-O-demethylase의 활성도 변화를 측정하여 다음과 같은 결론을 얻었다. 1. 3-MC를 흰쥐에 투여하였을 때 hepatic microsomal cytochrome P-450의 활성도가 모두 증가되었으며, 성장단계에 따른 활성도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 신생, 미성숙 흰쥐의 순서로 나타났고 숫컷의 경우에는 미성숙 흰쥐가 세단계중 높고 성숙, 신생 흰쥐의 순서로 나타났다. 2. 3-MC를 투여하였을 때 hepatic microsomal NADPH-cytochrome C reductase의 활성도는 모두 증가 되었으며 성장단계에 따른 활성도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 신생, 미성숙 흰쥐의 순서로 나타났고 숫컷의 경우에는 미성숙 흰쥐가 세단계중 높고 성숙, 신생 흰쥐의 순서로 나타났다. 3. 3-MC를 투여하였을 때 hepatic microsomal cytochrome b_5의 활성도는 암컷의 경우 미성숙 성숙 흰쥐에서, 숫컷의 경우 성숙 흰쥐에서 증가되었다. 성장단계에 따른 활성도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 신생, 미성숙 흰쥐의 순서로 나타났고 숫컷의 경우에는 미성숙 흰쥐가 세단계중 높고 성숙, 신생 흰쥐의 순서로 나타났다. 4.3-MC를 투여하였을 때 hepatic microsomal NADH-cytochrome C reductase의 활성도는 암컷의 경우 성숙 흰쥐에서, 숫컷의 경우 미성숙, 성숙 흰쥐에서, 증가되었다. 성장단계에 따른 활성도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 신생, 미성숙 흰쥐의 순서로 나타났고, 숫컷의 경우에는 성숙 흰쥐가 세단계중 높고 미성숙, 신생 흰쥐의 순서로 나타났다. 5. 3-MC를 투여하였을 때 hepatic microsomal lipid peroxide의 형성은 대부분 증가되었으며 성장단계에 따른 활성도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 미성숙, 신생 흰쥐의 순서로 나타났고 숫컷의 경우에는 성숙 흰쥐가 세단계중 높고 미성숙, 신생 흰쥐의 순서로 나타났다. 6. 3-MC를 투여하였을 때 hepatic microsomal p-nitroanisole-O-demethylase의 활성도는 모두 증가되었으며, 성장단계에 따른 활서도는 암컷의 경우에는 성숙 흰쥐가 세단계중 높고 신생, 미성숙 흰쥐의 순서로 나타났고 숫컷의 경우에는 미성숙 흰쥐가 세단계중 높고 신생, 성숙 흰쥐의 순서로 나타났다. The effects of 3-Methylcholanthrene (3-MC), sex, and developmental stage on the hepatic microsomal cytochrome P-450 enzyme system in rats were investigated. The result is as follows. 1. The contents of hepatic microsomal cytochrome P-450 were increased in 3-MC treated rats compared with control. In the three developmental stages of the female and male rats the contents of cytochrome P-450 were highest in the adult female rats followed by neonatal and immature male rats followed by adult and neonatal male rats. 2. The contents of hepatic microsomal NADPH-cytochrome C reductase were increased in 3-MC treated rats compared with control. In the three developmental stages of female and male rats the contents of NADPH-cytochrome C reductase were highest in the adult female rats followed by neonatal and immature female rats in that order and highest in the immature male rats followed by adult and neonatal male rats in that order. 3. The contents of hepatic microsomal cytochrome b_5 were increased in 3-MC treated immature female, adult female and male rats compared with control. In the three developmental stages of the female and male rats the contents of cytochrome b_5 were highest in the adult female rats followed by neonatal and immature female rats in that order and highest in the immature male rats followed by adult and neonatal male rats in that order. 4. The contents of hepatic microsomal NADH-cytochrome C reductase were increased in 3-MC treated adult female, immature male, and adult male rats compared with control. In the three developmental stages of NADH-cytochrome C reductase were highest in the adult female rats followed by neonatal and immature female rats in that order and highest in the adult male rats followed by immature and neonatal male rats in that order. 5. The formations of lipid peroxide were increased in 3-MC treated rats compared with control. In the three developmental stages of female and male rats the formations of lipid peroxide were highest in the adult female rats followed by the immature and neonatal female rats in that order and highest in the adult male rats followed by immature and neonatal male rats in that order. 6. The contents of hepatic microsomal p-nitroanisole-O-demethylase were increased in 3-MC treated rats compared with control. In the three developmental stages of the female and male rats the contents of p-nitroanisole-O-demethylase were highest in the adult female rats followed by the immature and neonatal female rats in that order and highest in the immature male rats followed by the neonatal and adult male rats in that order.
반응표면 분석을 이용한 Salmonella enteritidis의 증식 효능 평가
홍정미,정효준,이홍근 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12
This stidy was performed to investigate the single and combined effect of concentrations of garlic juice according to the pH and temperature on the growth of Salmonella enteritdis in brain heart infusion broth, and to develope Response surface model for the effect of concentrations of garlic extract. The results of electric conductibility of Salmonella enteritidis growing in the range of incubation temperature (25~42℃), PH(5.5~9.0) and concentration of garlic juice(0~0.8%) showed that a badge with high low D.T.value and concentration of garlic extract were significantly with D.T.value and concentration of garlic extract were significantly correlated with D.T.value (p<0.01). Growth of Salmonella enteritidis in the condition of 37℃ and pH7.0 presented the lowest D.T.value.