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지유(地楡) 부탄올 분획물의 Streptococcus mutans 항균활성 및 항산화 효과
박근혜 ( Geim Hye Park ),이진태 ( Jin Tae Lee ),안봉전 ( Bong Jeun An ) 대한본초학회 2012 大韓本草學會誌 Vol.27 No.3
Objective: Sanguisorbae Radix(SO), that belong to Rosaceae is widely distributed in Asia including Korea, Japan and China. It has been used as traditional medicine from old times as a treatment for anti-inflammatory drugs. This study was designed to investigate the effects of n-BuOH fractions of SO on anti-oxidant effect and anti-microbial effect on Streptococcus mutans (S. mutans). Methods: The anti-microbial effect of n-BuOH fractions of SO. was assessed by the paper disk diffusion method and anti-oxidant effect was assessed by the DPPH radical scavenging effect, Superoxide anion radical scavenging effect and SOD like ability. Results : DPPH radical scavenging of the n-BuOH fraction from SO in 50 ug/mL was shown to be Fr-2 (89.9%), Fr-3 (88.7%), Fr-4 (76.3%), Fr-1 (59.4%), Fr-5 (56.2%), Superoxside anion radical scavenging activity of the n-BuOH fraction from SO, in 50 ug/mL for Fr-3 was shown to be 78%. SOD-like activity of n-BuOH fraction from the SO in 1000 ug/mL for Fr-3 were shown to be 76.1% respectively, The n-BuOH fraction from the SO had high anti-microbial effect on S, mutans. Conclusion: As a result, the n-BuOH fraction from SO. has good anti-microbial and anti-oxidant effects in a concentration-dependent manner.
Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films
Britnell, L.,Ribeiro, R. M.,Eckmann, A.,Jalil, R.,Belle, B. D.,Mishchenko, A.,Kim, Y.-J.,Gorbachev, R. V.,Georgiou, T.,Morozov, S. V.,Grigorenko, A. N.,Geim, A. K.,Casiraghi, C.,Neto, A. H. Castro,Nov American Association for the Advancement of Scienc 2013 Science Vol.340 No.6138
<P><B>Atomic Layer Heterostructures—More Is More</B></P><P>The isolation of stable layers of various materials, only an atom or several atoms thick, has provided the opportunity to fabricate devices with novel functionality and to probe fundamental physics. <B>Britnell <I>et al.</I></B> (p. 1311, published online 2 May; see the Perspective by <B>Hamm and Hess</B>) sandwiched a single layer of the transition metal dichalcogenide WS<SUB>2</SUB> between two sheets of graphene. The photocurrent response of the heterostructure device was enhanced, compared to that of the bare layer of WS<SUB>2</SUB>. The prospect of combining single or several-atom-thick layers into heterostructures should help to develop materials with a wide range of properties.</P>
Scanning nano-SQUID nanoscale thermal imaging of dissipation in quantum systems
Dorri HALBERTAL,Jo CUPPENS,Moshe BEN-SHALOM,Lior EMBON,Nitzan SHADMI,Yonathan ANAHORY,Hr NAREN,Jayanta SARKAR,Aviram URI,Yuval RONEN,Yuri MYASOEDOV,Leonid LEVITOV,Ernesto JOSELEVICH,Andre GEIM,Eli ZEL 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8