• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.254-255
• /
• 2007

This paper describes underwater discharge phenomena which are less studied than gas, solid and dielectric liquid. Since discharge phenomena were affected by various factors, we investigated the effect of water resistivity in point-plane gap by impulse voltage. In discharge photograph, it is hard to discover the streamer development in positive polarity at high reisistivity. On the other hand, the streamer originated at the tip of rod and developed toward the plane with increasing voltage. It is found that the breakdown voltage of both polarities in lower resistivity are lower than that of high resistivity. High current flowing in lower resistivity before the breakdown induce more streamer and enhance the probability of breakdown.

• Communications of the Korean Mathematical Society
• /
• v.8 no.2
• /
• pp.213-223
• /
• 1993

• Magazine of the Korean Society of Agricultural Engineers
• /
• v.55 no.1
• /
• pp.51-57
• /
• 2013

• Korean Journal of Plant Resources
• /
• v.34 no.3
• /
• pp.203-215
• /
• 2021

Bok choy is one of Brassica vegetables widely consumed worldwide. Brassica vegetables have been reported to exert various pharmacological activities such as antioxidant, anti-cancer and cardioprotective activity. However, studies on immunostimulatory activity of bok choy sprout have not been conducted properly. Thus, in this study, we investigated in vitro immunostimulatory activity of bok choy sprout extract (BCS) using mouse macrophage RAW264.7 cells. Our results showed that BCS increased the production of immunomodulators such as NO, iNOS, IL-1β, IL-6, IL-12, TNF-α and MCP-1, and phagocytic activity in RAW264.7 cells. BCS activated MAPK, NF-κB and PI3K/AKT signaling pathways. However, BCS-mediated production of immunomodulators was dependent on JNK, NF-κB and PI3K/AKT signaling pathways. the mRNA expression of TLR2 were significantly increased by BCS, TLR2 inhibition by anti-TLR2 dramatically suppressed the production of immunomodulators by BCS. In addition, TLR2 inhibition by anti-TLR2 significantly reduced BCS-mediated phosphorylation level of AKT, JNK and NF-κB. From these results, BCS may have immunostimulatory activity via TLR2-MAPK, NF-κB and PI3K/AKT signaling pathways. Therefore, BCS expected to be used as a potential immune-enhancing agent.

• Magazine of the Korean Society of Hazard Mitigation
• /
• v.3 no.2 s.9
• /
• pp.65-69
• /
• 2003

• Journal of the KSME
• /
• v.47 no.11
• /
• pp.39-44
• /
• 2007

• Journal of the Korean Institute of Educational Facilities
• /
• v.7 no.1
• /
• pp.102-111
• /
• 2000

• 한국사회복지학회:학술대회논문집
• /
• 2001.04a
• /
• pp.318-335
• /
• 2001

• 대한생식의학회:학술대회논문집
• /
• 2002.11a
• /
• pp.59-59
• /
• 2002

• 대한치과보철학회:학술대회논문집
• /
• 2004.04a
• /
• pp.62-62
• /
• 2004