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Kang, Sera,Suh, Sang Jae The Korean Society of Systematic Zoology 2017 Animal Systematics, Evolution and Diversity Vol.33 No.4
Flies of the genus Scatella are small and dark-gray, and many species have distinctive whitish spots on their gray wings. Most species are found in damp environment, such as the borders of marshes, seashore areas, swamps, lakes, ponds, streams, and paddy fields. The Korean shore fly genus Scatella Robineau-Desvoidy has been taxonomically noted. A total of five species have been identified: S. calida Matsumura, 1915, S. nipponica Miyagi, 1977, S. obsoleta Loew, 1861, S. paludum (Meigen, 1830), and S. tenuicosta Collin, 1930. This is the first report of S. calida Matsumura, 1915 from Korea. A key to the Korean Scatella species and photographs of the external features have been provided.
Kang, Seunghun,Jeon, Sera,Kim, Sera,Seol, Daehee,Yang, Heejun,Lee, Jaekwang,Kim, Yunseok American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.32
<P>Piezoelectricity crystallographically exists only in the in-plane direction in two-dimensional transition metal dichalcogenides. Here, we demonstrated flexoelectricity-tunable out-of-plane piezoelectricity in semiconducting 2H-MoTe<SUB>2</SUB> flakes by creating surface corrugation. In particular, the strong out-of-plane piezoelectricity and its spatial variation depending on local flexoelectricity was observed even though crystallographically there exists only in-plane piezoelectricity. Surface corrugation-mediated flexoelectricity tuning can be applied to other two-dimensional or thin-layered materials and, furthermore, the results could provide useful information on the interweaving nature between mechanical stimulus and electric dipole in low-dimensional materials.</P> [FIG OMISSION]</BR>
Kang, Seunghun,Kim, Sera,Jeon, Sera,Jang, Woo-Sung,Seol, Daehee,Kim, Young-Min,Lee, Jaekwang,Yang, Heejun,Kim, Yunseok Elsevier 2019 Nano energy Vol.58 No.-
<P><B>Abstract</B></P> <P>It is known that only in-plane piezoelectricity exists in pristine two dimensional (2D) transition metal dichalcogenides (TMDs). In this study, we demonstrate the creation of strong out-of-plane piezoelectricity in semiconducting 2H-MoTe<SUB>2</SUB> flakes by an artificial atomic-scale symmetry breaking. The atomic-scale symmetry breaking associated with flexoelectricity was realized through Te vacancy formation by a simple thermal annealing of the 2D TMDs. The strong out-of-plane piezoelectricity was experimentally measured and confirmed by theoretical calculations. This strategy of atomic-scale symmetry modulation for out-of-plane piezoelectricity can be easily applied to a broader class of 2D TMD materials that have not been used for applications with out-of-plane piezoelectricity. Accordingly, it can stimulate the expansion of practical energy device applications with 2D TMD materials.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Achievement of strong out-of-plane piezoelectricity. </LI> <LI> Atomic-scale symmetry breaking via Te vacancy formation. </LI> <LI> Simple strategy for inducing out-of-plane piezoelectricity by thermal annealing. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Sera Kang,Sang Jae Suh 한국동물분류학회 2017 Animal Systematics, Evolution and Diversity Vol.33 No.4
Flies of the genus Scatella are small and dark-gray, and many species have distinctive whitish spots on their gray wings. Most species are found in damp environment, such as the borders of marshes, seashore areas, swamps, lakes, ponds, streams, and paddy fields. The Korean shore fly genus Scatella Robineau-Desvoidy has been taxonomically noted. A total of five species have been identified: S. calida Matsumura, 1915, S. nipponica Miyagi, 1977, S. obsoleta Loew, 1861, S. paludum (Meigen, 1830), and S. tenuicosta Collin, 1930. This is the first report of S. calida Matsumura, 1915 from Korea. A key to the Korean Scatella species and photographs of the external features have been provided.
( Wonseok Kang ),( Sera Yang ),( Sohee Kang ),( Ji-young Kim ),( Yong-han Paik ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide. Recently, PD-1 blockade has shown promising results in the treatment of advanced HCC. However, only 15-20% of patients showed objective response, suggesting the need for development of an effective combination therapy. CD47 is an innate immune checkpoint molecule known as ‘don’t-eat me’ signal, which plays a critical role in macrophage activation and phagocytosis. In the current study, we investigated the effects of anti-CD47 inhibition in combination with PD-1 blockade in a syngeneic preclinical model of HCC. Methods: The effect of anti-CD47 and/or anti-PD-1 treatment was studied in vitro and in vivo using a syngeneic preclinical model of HCC. Flow cytometry was used to assess the phagocytic activity of macrophages. Results: Phagocytosis of HCC cells by macrophages was increased after treatment with anti-CD47 and/or anti-PD-1 treatment. Further, combinatory treatment of anti-CD47 and anti-PD-1 blockade significantly suppressed tumor growth and improved survival in the syngeneic preclinical model of HCC. Conclusions: Targeting CD47 in combination with anti-PD-1 immune checkpoint blockade has a potential immunotherapeutic efficacy in HCC.
국내 유통 다소비 농산물의 잔류농약 모니터링 및 노출평가
강남숙(Namsuk Kang),김성철(Seongcheol Kim),강윤정(Yoonjung Kang),김도형(Dohyeong Kim),장진욱(Jinwook Jang),원세라(Sera Won),현재희(Jaehee Hyun),김동언(Dongeon Kim),정일용(Il Yong Jung),이규식(Gyuseek Rhee),신영민(Yeongmin Shin),정동윤(D 한국농약과학회 2015 농약과학회지 Vol.19 No.1
This study was implemented to evaluate food safety on residual pesticides in agricultural products of Korea and to use as a data base for the establishment of food policy. A total of 196 pesticide upon these products were analyzed using multi class pesticide multiresidue methods of Korean Food Code, and 232 samples of 15 agricultural products collected from 9 regions were supplied for this study. In the results, 64 kinds of pesticides were detected in 53 samples, chlorpyrifos and procymidone of them were shown a high frequency of detection in the analyzed pesticides. Among them, two samples (chlorpyrifos in perilla leaves and picoxystrobin in peach) were detected over Maximum Residue Limits (MRLs). The levels of the detected pesticide residues were within safe levels. Also, the intake assessment for pesticide residues including chlorpyrifos at multi pesticide residue monitoring were carried out. The result showed that the ratio of EDI (estimated daily intake) to ADI (acceptable daily intake) was 0.001~0.902% which means that the detected pesticide residues were in a safe range so that residual pesticides in the agricultural products in Korea are properly controlled.