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주부의 인터넷 쇼핑의 유용성 인지가 활용도에 미치는 영향
박미석,이유리 숙명여자대학교 2000 生活科學硏究誌 Vol.15 No.-
This study analyzes the trend of the awareness of usefulness and usage frequency of Internet shopping and closely examines the influential factors of the trend. In addition, in this study the usage rate of Internet shopping are divided into that of search and purchase, so that the relationships of variables are easily derived through a process matrix. After all, the purpose of this methodology was to provide informatized housewives and household with fundamental data by finding a way to increase the awareness of usefulness and usage frequency of Internet shopping. The major findings are follows: (1) Those who are college-educated, married and employed, positive about information household, Internet-educated, highly capable of the Internet, and comfortable with an issue of an effluence of personal data showed high awareness of usefulness of Internet shopping. (2) Those who are young, college graduate or above, and employed showed the high usage rate of search. Those who are age 20 to 30, college graduate or above, employed, and at the early stage of family life style showed the high usage rate of purchase. In addition, those who are positive about information household, high in the tendency of innovation and the awareness of time constraints, exposed to the Internet education, high in the Internet capability, and low in a burden of the Internet bills and the effulence of personal data showed the high usage rate of search and purchase. (3) An awareness of time constraints and a concern for the effulence of personal data directly influence the usage rate of purchase and indirectly influence the usage awareness of internet shopping. And an attitude toward information household' and Internet capability directly influence the usage rate of search and purchase and indirectly influence the usage awareness of internet shopping. Therefore, according to the result of process matrix, an awareness of usefulness of Internet shopping, an attitude of information household, Internet capability are the variables that influence the usage rate of Internet shopping.
인체 췌장암세포주(Capan-1)의 증식에 미치는 amiloride의 억제효과
임대관,김신,김유리,노지훈,이지현,김지연,박무인,정근옥,박건영,구자영 고신대학교 의학부 2004 高神大學校 醫學部 論文集 Vol.19 No.1
Background/Aims Cytoplasmic alkalinization induced by activation of the Na+/H+anti porter which is stimulated upon the addition of growth-promoting agents, such as insulin, epidermal growth factor, phorbol ester, plays an essential role in the initiation on cell proliferation. In the present study the effects of amiloride, a specific and reversible inhibitor of Na+/H+antiporter, on the growth of human pancreatic carcinoma cell line, Capan-1 cells was examined and the effects of 5-fluorouracil (5-FU) were also studied. Cell cycle analysis was done to examine the mechanisms for the inhibitory effects of amiloride. Materials/Methods The growth of Capan-1 cells were examined by counting cell number on two and four days treatment with 1 μM, 5 μM, 10 μM, 20 μM, 40 μM, 80 μM, 160 μM amiloride, and 0.1 ㎍/㎖, 0.3 ㎍/㎖ 5-FU, after plating Capan-1 cells into 35-mm2 plastic dishes at d density of 10x104 cells/dish. The reversibility of the effects of amiloride was examined on two day to eight days treatment with 20 μM amiloride after seeding 2×104 cells/dish. Cell cycle analysis was done on the sells after four days treatment with 20 μM amiloride. Results Amiloride significantly inhibited the growth of Capan-1 cells in a dose-dependent fashion (p<0.05). The inhibitary effect of amiloride on the growth of Capan -1 cells was firstly shown at the concentration of 5 μM, which is not so higher than the concentration of 0.1-0.2 μM attainable by administration of usual dose of amiloride (5-10㎎). Forty-eight percent inhibition of growth was found at an amiloride concentration of 20μM after 4 days treatment, and ninety-three percent inhibition of growth was found at an amiloride concentration of 160μM after 4 days treatment. The inhibitory effect of amiloride on growth of Capan-1 cells was reversible since removal of amiloride by a media change after 48 hours treatment lead to significantly more growth than amiloride treated group (p<0.05). The reversibility of growth inhibition suggests that amiloride in not a non-specific cytotoxin for Capan-1 cells. Amiloride combined with 5-FU significantly inhibited the growth of Capan-1 cells in a dose-dependent fashion compared to an amiloride or a 5-FU alone (p<0.05). After four days treatment with 20 μM amiloride, the faction of cells in G0-G1 phase, S phase and G2-M phase was 47.3%, 35.8%, 16.9% respectively in the amiloride group (20 μM), and 44.3%, 37.1%, 18.6% in the control group. showing no significant differences between the two groups. Conclusions Amiloride significantly inhibited the growth of Capan-1 cells in a dose-dependent fashion, which was reversible. The reversibility of growth inhibition suggests that amiloride is not a non-specific cytotoxin for Capan-1 cells. The concentration of 5 μM, which is not so higher than the concentration of 0.1-0.2 μM attainable by administration of usual dose of amiloride (5-10㎎), which suggests amiloride or its analogues may be used alone or in conjunction with 5-FU for the treatment of pancreatic carcinoma. Further study is needed to clarify the effects of more potent analogues of amiloride on the growth of human pancreatic carcinoma cells.
Analysis of toxicity of tetrabutyltin: comparing with EDC chemicals
Yu Ri An,Seung Jun Kim,Hye-Won Park,So Yeon Yu,Jeong Han,Jung-Hwa Oh,Seok Joo Yoon,황승용 대한독성 유전단백체 학회 2011 Molecular & cellular toxicology Vol.7 No.1
Exposure to environmental chemicals has been implicated in a number of adverse health effects,including immunotoxic, neurotoxic, reproductive toxic effects, and, above all, cancers. In the present study,we investigated toxicity of three environmental chemicals-bisphenol A (BPA), nonylphenol (NP), and tetrabutyltin (TTBT) in a human breast cancer cell line by HazChem Human array. We then found toxicity markers of TTBT through comparison with BPA and NP. Fifty three genes were differentially expressed and seventeen genes showed similar expression patterns. Ontology analysis showed differential expression of genes related to aging and apoptosis and genes having similarities associated with pregnancy and insemination. In this paper, we revealed potential TTBT toxic markers and endotoxicity of TTBT. This study could be a foundation for additional studies of TTBT toxicity.
( Yu Ri Kim ),( Soo Young Kim ),( Nam Kyung Roh ),( Ho Jung Jung ),( Jae Wook Jung ),( Yu Na Lee ),( Hyung Jin Hahn ),( Hyun Jung Park ),( Yang Won Lee ),( Yong Beom Choi ),( Kyu Joong Ahn ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: There has been a report suggesting clinical effectiveness of phototherapy using a long-pulsed Nd:YAG laser as the alternative treatment of onychomycosis, but objective evaluation of the therapeutic effect and in-depth study of the mechanism of treatment are still insufficient. The authors performed an in-vitro study of Trichophyton rubrum, a pathogen which has been attributed in more than 80% of onychomycosis, and investigated antifungal effect of 1064 nm long-pulsed Nd:YAG laser. Objectives: To determine whether the growth of T. rubrum is inhibited by direct irradiation of 1064nm long-pulsed Nd:YAG laser. Methods: T. rubrum was collected from the nails of 5 onychomycosis patients, which were irradiated with the laser 200 shots each time at intervals of 3 to 5 days for 29 days. Colony diameter was compared directly with the control group to observe the difference in growth rate. Results: The growth rate was not different between the T. rubrum colony irradiated with 1064 nm long-pulsed Nd:YAG laser and the colony not irradiated with the laser. Conclusion: In this study, the laser did not seem to have a direct effect on T. rubrum. It can be speculated that the therapeutic effect of 1064 nm long-pulsed Nd:YAG laser on onychomycosis may be attributable to tissue changes of the lesion, rather than to damaging of the fungus itself.