• Korean Journal of Food Science and Technology
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• v.41 no.5
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• pp.566-571
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• 2009

The principal objective of this study was to use a fermentation and extrusion process in order to improve the antioxidant properties of original Sangmaksan (ES), containing maekmoondong, omija, and white ginseng. The antioxidant activities of fermented Sangmaksan prepared with different types of ginseng [white (FSW), red (FSR), and extruded white (FSE)], were investigated. The white ginseng powder was extruded at 20% moisture content and $120^{\circ}C$ of the maximum process temperature at the barrel. The antioxidant properties of Sangmaksan were increased after fermentation. Interestingly, the fermented Sangmaksan containing the extruded white ginseng evidenced more potent antioxidant properties than the fermented Sangmaksan containing white ginseng. The content of total phenolic compounds, DPPH-radical scavenging activity, acidic polysaccharide, reducing power, and total anthocyanin were highest with FSR, followed by FSE, FSW and ES, respectively. Additionally, superoxide dismutase-like activity and total flavonoid contents were highest in the fermented Sangmaksan containing extruded white ginseng. In conclusion, it can be asserted that the fermentation and extrusion process utilized in this study may prove to be an effective new process for the production of high-quality Sangmaksan.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.729-730
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.815-816
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.1115-1116
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.837-838
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1077-1078
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• 2013

• Proceedings of the KWS Conference
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• 2004.05a
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• pp.159-161
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• 2004

FSW공전은 특수하게 설계된 용접툴(tool)을 특정한 회전수로 회전시키면서 용접하고자하는 재료의 용접라인에 삽입하여 용접에 필요한 마찰열과 소성변형을 발생시키고, 그 후 용접라인을 따라 툴을 이동시킴으로써 용접이 이루어지는 매우 간단한 공정이다. (중략)

• Proceedings of the KWS Conference
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• 2006.05a
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• pp.103-105
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• 2006

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2007.05a
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• pp.258-261
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• 2007

Failure phenomena in uni-axial tension test were experimentally and numerically investigated for AA6111-T4, AA5083-H18 and DP-Steel, which were friction-stir welded with the same and different thicknesses. Forming limit diagram(FLD) was measured using hemispherical dome stretching tests for base materials and also predicted by Hill's bifurcation and M-K theories for welded areas. Finite element simulations well predicted hardening behaviors, failure locations as well as failure patterns for the uni-axial tension tests especially utilizing very fine meshes and FLD along with stress softening.

• Journal of Welding and Joining
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• v.22 no.5
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• pp.53-57
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• 2004

Friction stir weldability of AZ31B-H24, AZ61A-F and AZ91C-F Mg alloys were studied using microstructural observation and mechanical tests. The microstructure of stir zone(SZ) was coarse in AZ31B-H24 alloy whereas it was very fine both in AZ61A-F and AZ91C-F alloys. The hardness of SZ was remarkably increased by very fine recrystallized grains both in AZ61A-F and AZ91C-F alloys. On the other hand, the hardness of SZ was decreased in AZ31B-H24 due to the coarse microstructure. In SZ, AZ91C-F alloy showed very high hardness values because of dispersion hardening of $Mg_{17}$Al$_{12}$($\beta$ phase) and Al solid solution hardening. Because of more $Mg_{ 17}Al_{12}($\beta$ phase)$ intermetallic compounds, Mg alloy with high Al content showed poor mechanical properties.s.