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민순홍,표명윤 숙명여자대학교 약학연구소 2006 약학논문집-숙명여자대학교 Vol.23 No.-
We investigated the cytotoxicity of chitosan on cancer cell lines (P388, L1210, HCT-15, and SK-HepG-1) and mouse splenocytes as normal cells by MTT assay. Chitosan (37.5㎍/㎖, 75㎍/㎖, 112.5 ㎍/㎖, and 150㎍/㎖) showed dose-dependent cytotoxicity against the cancer cell lines. Particularly, chitosan showed lower cytotoxicity against the normal mouse splenocytes than against the cancer cell lines at high doses (112.5㎍/㎖ and 150㎍/㎖). These results indicate that chitosan may selectively induce growth inhibition in cancer cell lines.
민순홍,임수빈,Tatiana Kogan 한국마케팅학회 2014 ASIA MARKETING JOURNAL Vol.16 No.1
Despite heightened interest in and increased urgency surrounding the adoption of green business initiatives, firms seem to suffer from a limited understanding of the prerequisites and profit potentials of green strategies. Our proposed theoretical model suggests that green purchasing asa unique firm capability must be built on internal organizational characteristics (i.e., top management commitment to environmental management, inter-functional coordination, and performance evaluation and reward systems), and that it eventually helps a firm obtain positive financial performance. We offer some research propositions about potential causal relationships among key constructs that can be empirically tested in future research. We conclude the current study with implications for both managers and researchers.
충북과 충남 오이 재배지에서 채집한 오이흰가루병균 집단의 살균제 저항성 검정
민순홍,김흥태 한국농약과학회 2023 농약과학회지 Vol.27 No.4
Fungicide resistance test to pathogen populations of powdery mildew collected from 6 regions in Chungbuk and Chungnam was conducted on the cotyledons of cucumber seedlings grown in a greenhouse in 2020. The pathogen populations of powdery mildew in the 6 regions were thought to be highly resistant to most fungicides except for protective fungicides. Boscalid and penthiopyrad, as succinate dehydrogenase inhibiting fungicides (SDHI fingicides) belonging to the fungicide group C2, showed a control efficacy of less than 70% on each pathogen population collected in all regions. Fluxapyroxad showed more than 70% of control value against pathogen populations collected from Bunpyeong, Jincheon, and Byeongcheon – field 2, while its control value against them from Osong, Byeongcheon – field 1, and Ipjang was very low. Fluopyram showed control value of 63.2% and 54.2% against them in Bunpyeong and Byeongcheon – field 2, respectively, and a good efficacy of over 70% in the other regions. Pyraclostrobin, a strobilurin fungicide included into C3 group, showed little control value. Among the fungicides that inhibit ergosterol biosynthesis belonging to G1 group, the control values of difenoconazole and tetraconazole were very low, while prochloraz showed excellent control values ranging from 66.7% to 100% to each population in five fields. Among protective fungicides, as sulfur, iminoctadine tris-albesilate and propineb, had excellent control values to them in most regions. Therefore, preventive treatment with protective fungicides should be recommended to control cucumber powdery mildew. In addition, in order to increase the control efficiency and manage fungicide resistance, it is believed that a fungicide treatment system based on protective fungicide should be established and used.
In vitro에서 chitosan이 항암제의 세포독성에 미치는 영향
민순홍,표명윤,Min, Soon-Hong,Pyo, Myoung-Yun 환경독성보건학회 2007 환경독성보건학회지 Vol.22 No.3
Chitosan is a depolymerized and partially deacetylated derivative of chitin. We investigated the cytotoxicity of chitosan in cancer cell lines, such as P388, L1210, HCT-15, SK-HepG-1 and mouse splenocytes as a normal cell by MTT assay. To clarify whether chitosan enhances cytotoxicity of anticancer drugs, we also examined the cytotoxicity of combined treatment with chitosan and anticancer drugs, such as cisplatin, mitomycin C, and 5-fluorouracil in cancer cell lines in vitro. Chitosan ($37.5\;{\mu}g/mL,\;75\;{\mu}g/mL,\;112.5\;{\mu}g/mL,\;and\;150\;{\mu}g/mL$) showed concentration-dependent cytotoxicity in the cancer cell lines. In addition, chitosan showed relatively lower cytotoxicity in normal cells than in the cancer cell lines. Particularly, this trend was significant at high doses of chitosan, i.e. $112.5\;{\mu}g/mL,\;and\;150\;{\mu}g/mL$. Thus, these results suggest that chitosan may selectively induce the growth inhibition in cancer cell lines, compared to normal cells. Furthermore. the co-treatment of chitosan and anticancer drugs exhibited an apparant synergistic cytotoxicity in murine lymphoma cell lines, i.e. P388 and L1210 at $37.5\;{\mu}g/mL$ of chitosan rather than at $75\;{\mu}g/mL$ of chitosan, but such phenomenon could not be observed in solid tumor cell lines, i.e. HCT-15 and SK-HepG-1. However, chitosan did'nt reduced the cytotoxicity against normal mouse splenocytes induced by anticancer drugs. Therefore, it is concluded that the combination of chitosan and anticancer drugs might be useful for the cancer chemotherapy.