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Human adipose tissue-derived mesenchymal stem cells inhibit melanoma growth in vitro and in vivo.
Ahn, Jin-Ok,Coh, Ye-Rin,Lee, Hee-Woo,Shin, Il-Seob,Kang, Sung-Keun,Youn, Hwa-Young Potamitis Press 2015 Anticancer research Vol.35 No.1
<P>The effects of adipose tissue-derived mesenchymal stem cells (AT-MSCs) on the growth of human malignancies, including melanoma, are controversial and the underlying mechanisms are not yet-well understood. The aim of the present study was to investigate the in vitro and in vivo anti-tumor effects of human AT-MSCs on human melanoma.</P>
Ahn, Chi-Yeong,Hwang, Wonchan,Lee, Hyunjoon,Kim, Sungjun,Park, Ji Eun,Kim, Ok-Hee,Her, Min,Cho, Yong-Hun,Sung, Yung-Eun Elsevier 2018 International journal of hydrogen energy Vol.43 No.21
<P><B>Abstract</B></P> <P>An ideal oxygen reduction catalyst for use in fuel cells should exhibit both long-term durability and high activity. In this study, to increase the durability of highly loaded platinum- and platinum-nickel alloy catalysts possessing different types of carbon supports, a nitrogen-doped carbon shell was introduced on the catalyst surface through dopamine coating. As the catalyst surfaces were altered following shell formation, the ionomer contents of the catalyst inks were adjusted to optimise the three-phase boundary formation. Single cell tests were then conducted on these inks by applying them in a membrane electrolyte assembly. Furthermore, to confirm the durability of the catalysts under accelerated conditions, the operation was continued for 200 h at 70 °C and at a relative humidity of 100%. Transmission electron microscopy and electrochemical analysis were conducted before and after the durability tests, and the observed phenomena were discussed for catalysts bearing different types of carbon supports.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nitrogen-doped carbon shell by dopamine coating is introduced to highly-loaded Pt and PtNi alloy catalysts. </LI> <LI> Pt and PtNi catalysts are supported on carbon black and heat-treated carbon, respectively. </LI> <LI> Performance and durability were improved by applying a Pt-alloy catalyst in combination with a N-doped carbon shell. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Ok, Soo-Min,Kim, Kyung-Hee,Heo, Jun-Young,Ahn, Yong-Woo,Jeong, Sung-Hee Korean Academy of Orofacial Pain and Oral Medicine 2015 Journal of Oral Medicine and Pain Vol.40 No.2
Purpose: This study was performed to investigate a correlation among oral hygiene habits, dryness of mouth, and self-perceived oral malodor and therefore to find out self-care methods which could be a help to reduce oral malodor. Methods: A survey of 296 dental undergraduate students of School of Dentistry, Pusan National University, who wrote consents voluntarily and participated in this study, was conducted using a questionnaire consisting of 17 questions and analyzed to investigate a correlation among oral hygiene habits (frequency of tooth brushing, water gargling, and drinking water, etc.), dryness of mouth indicating the amount of salivary secretion, and self-perceived oral malodor. Results: There was no significant correlation between mechanical cleaning factors and self-perceived oral malodor. The factor showing a strong correlation with severe self-perceived oral malodor was dryness of mouth (p=0.000). Conclusions: There was no correlation between mechanical cleaning habits and self-perceived oral malodor. Participants who felt self-perceived oral malodor more tended to have rather good mechanical cleaning habits. The factor showing a strong correlation with severe self-perceived oral malodor was dryness of mouth. Therefore trying to increase salivary secretion is considered to be a help to reduce self-perceived halitosis.