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Jia, Yuefa,Liu, Jia,Cha, Sangwon,Choi, Soobin,Park, Yun Chang,Liu, Chunli THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2017 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.47 No.-
<P><B>Abstract</B></P> <P>Magnetically recyclable Au-TiO<SUB>2</SUB>/nanocube ZnFe<SUB>2</SUB>O<SUB>4</SUB> (Au-TiO<SUB>2</SUB>/NC ZFO) composite photocatalysts have been successfully prepared by a hydrothermal method. It was revealed that Au-TiO<SUB>2</SUB>/NC ZFO composite with 25% mass percentage of Au-TiO<SUB>2</SUB> exhibited a significantly enhanced photocatalytic efficiency toward chlortetracycline (CTC) degradation as compared to the binary TiO<SUB>2</SUB>/NC ZFO composite. The enhanced performance can be attributed to the addition of Au nanoparticles, which act as electron traps aiding the electron-hole separation and increasing the light absorption through the surface plasmon resonance effect. The synthesized catalyst showed good stability after three cycles and could be easily separated by a magnet and reused.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A new type ternary Au-TiO<SUB>2</SUB>/nanocube ZnFe<SUB>2</SUB>O<SUB>4</SUB>. </LI> <LI> The Au-TiO<SUB>2</SUB>/nanocube ZnFe<SUB>2</SUB>O<SUB>4</SUB> shows superior photocatalytic activity. </LI> <LI> The chlortetracycline can be removed by Au-TiO<SUB>2</SUB>/nanocube ZnFe<SUB>2</SUB>O<SUB>4</SUB>. </LI> <LI> Cycle degradation tests show the catalyst was highly active, stable and recoverable. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Magnetically separable Au-TiO<SUB>2</SUB>/nanocube ZnFe<SUB>2</SUB>O<SUB>4</SUB> composite exhibit an outstanding photocatalytic activity in degradation of chlortetracycline (CTC) under visible light irradiation.</P> <P>[DISPLAY OMISSION]</P>
Jia, Lina,Lee, Hun Seok,Wu, Chun Fu,Kundu, Juthika,Park, Sang Gyu,Kim, Ryong Nam,Wang, Li-Hui,Erkin, Ö,zgü,r Cem,Choi, Jong-Sun,Chae, Seoung Wan,Yang, Ho Bin,Choi, Yoon-La,Shin, Young Kee American Association for Cancer Research 2014 Molecular Cancer Research Vol.12 No.12
<P>SMAD4 has been suggested to inhibit the activity of the WNT/β-catenin signaling pathway in cancer. However, the mechanism by which SMAD4 antagonizes WNT/β-catenin signaling in cancer remains largely unknown. Aurora A kinase (AURKA), which is frequently overexpressed in cancer, increases the transcriptional activity of β-catenin/T-cell factor (TCF) complex by stabilizing β-catenin through the inhibition of GSK-3β. Here, SMAD4 modulated AURKA in a TGFβ-independent manner. Overexpression of SMAD4 significantly suppressed AURKA function, including colony formation, migration, and invasion of cell lines. In addition, SMAD4 bound to AURKA induced degradation of AURKA by the proteasome. A luciferase activity assay revealed that the transcriptional activity of the β-catenin/TCF complex was elevated by AURKA, but decreased by SMAD4 overexpression. Moreover, target gene analysis showed that SMAD4 abrogated the AURKA-mediated increase of β-catenin target genes. However, this inhibitory effect of SMAD4 was abolished by overexpression of AURKA or silencing of AURKA in SMAD4-overexpressed cells. Meanwhile, the SMAD4-mediated repression of AURKA and β-catenin was independent of TGFβ signaling because blockage of TGFβR1 or restoration of TGFβ signaling did not prevent suppression of AURKA and β-catenin signaling by SMAD4. These results indicate that the tumor-suppressive function of SMAD4 is mediated by downregulation of β-catenin transcriptional activity via AURKA degradation in a TGFβ-independent manner.</P><P><B>Implications:</B> SMAD4 interacts with AURKA and antagonizes its tumor-promoting potential, thus demonstrating a novel mechanism of tumor suppression. <I>Mol Cancer Res; 12(12); 1779–95. ©2014 AACR</I>.</P>
Knowledge Management Needs on Sport in Korea
( Jia Choi ),( Yong Kyu Ahn ) 한국체육학회 2016 국제스포츠과학 학술대회 Vol.2016 No.1
The South Korean government has been very supportive in promoting sports in its country by sending large delegations to participate in international mega sporting events as well as hosting them, including the four most important international events: Summer and Winter Olympic Games, FIFA World Cup, and the IAAF World Championships. By 2018, the Republic of Korea will become the 6th country to have hosted all of them following France, Germany, Italy, Japan and Russia. Korea also hosted two Universiades, three Asian Games, a World Rowing Championship, CSIM World Games and plans to host more international events. In addition, the country’s top athletes have participated in all scales of mega sporting events and have produced great results. For example, Korea’s national team placed 5th in the medals stand at the 2012 London Summer Olympics. This significant achievement has transformed South Korea into a sporting powerhouse. There are numerous key factors behind South Korea’s emergence as a sporting powerhouse: efficient investment in sport science, continuous effort of hosting sporting events, striving to discover promising young athletes and training them efficiently by collaborating science and sports. Experts in diverse fields (scientists, analysts, psychologists, physiologists, coaches, dietitians, etc) of sport meticulously studied the optimal conditions needed for athletes to enhance performance and achieve the best possible results in competitions. The development and expansion of sport science studies, technology and equipment laid the foundation for the athletes needs and provided optimal conditions for athletes to train which ultimately led them to be successful and win medals. Knowledge management is imperative in building on these successes, findings and experiences. The fundamental role of knowledge management and its importance for competitive advantage are clear. Knowledge itself has become both a strategic property and a major source of competitiveness. Therefore, there needs to be a game plan for gathering needs assessment to develop knowledge management solely dedicated to sports science as well as a database to collect the vast wealth of experience gained from hosting games. The collected data or knowledge will be analyzed and interpreted to find appropriate motivations and solutions to further maximize factors necessary for South Korea to maintain its standing as a sporting powerhouse. Establishing a model or system of knowledge management can innovate, benefit, and further exploit the success of South Korea’s sporting landscape.
Neurological Complications Resulting from Non-Oral Occupational Methanol Poisoning
Choi, Ji-Hyun,Lee, Seung Keun,Gil, Young-Eun,Ryu, Jia,Jung-Choi, Kyunghee,Kim, Hyunjoo,Choi, Jun Young,Park, Sun Ah,Lee, Hyang Woon,Yun, Ji Young The Korean Academy of Medical Sciences 2017 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.32 No.2
<P>Methanol poisoning results in neurological complications including visual disturbances, bilateral putaminal hemorrhagic necrosis, parkinsonism, cerebral edema, coma, or seizures. Almost all reported cases of methanol poisoning are caused by oral ingestion of methanol. However, recently there was an outbreak of methanol poisoning via non-oral exposure that resulted in severe neurological complications to a few workers at industrial sites in Korea. We present 3 patients who had severe neurological complications resulting from non-oral occupational methanol poisoning. Even though initial metabolic acidosis and mental changes were improved with hemodialysis, all of the 3 patients presented optic atrophy and ataxia or parkinsonism as neurological complications resulting from methanol poisoning. In order to manage it adequately, as well as to prevent it, physicians should recognize that methanol poisoning by non-oral exposure can cause neurologic complications.</P>