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Orientation Controlled Protein Nanocapsules by Enzymatic Removal of a Polymer Template
Lee, Chaeyeon,Hwang, Aran,Jose, Leeja,Park, Ji Hyun,Song, Jae Kwang,Shim, KyuHwan,An, Seong Soo A.,Paik, Hyun-jong American Chemical Society 2018 Biomacromolecules Vol.19 No.11
<P>Protein nanocapsules are potentially useful as functional nanocarriers because of their hollow structure and high biocompatibility and the intrinsic activity of their protein constituents. However, the development of a facile method for the preparation of oriented nanocapsules that retain their protein activity has been challenging. Here we describe the preparation of protein nanocapsules through the enzymatic removal of polymer templates. Nickel(II) nitrilotriacetic acid-end-functionalized poly(lactic acid) (Ni<SUP>2+</SUP>-NTA-PLA) was introduced as a polymeric template to immobilize hexa-histidine-tagged green fluorescence protein (His<SUB>6</SUB>-GFP) with consistent orientation. Following protein cross-linking and core-degradation, various measurements as a function of degradation time indicated the formation of hollow structures. We also demonstrated orientational control and activity preservation of the protein after capsule preparation. Protein nanocapsules prepared by this method can act as functional containers, taking advantage of the intrinsic function of their constituent proteins without additional modification.</P> [FIG OMISSION]</BR>
정무섭 ( Moosup Jung ),황승호 ( Seungho Hwang ),이다헌 ( Dahon Lee ),조아라 ( A-ra Jo ),이규환 ( Kyuhwan Lee ),전영태 ( Youngtae Jeon ),서환승 ( Hwanseung Suh ) 한국국제경영학회 2022 國際經營硏究 Vol.33 No.1
Unlike voluntary ethical management of companies such as CSR management and CSV management, ESG management can be said to be a major shift in the management paradigm in that it affects financial investment based on mandatory disclosure such as financial statements. In this situation, this study defined ESG management as “global ESG management” and divided it into global ESG management in overseas businesses centered on developing countries and global ESG management in global supply chain management. From the perspective of global ESG management, annual sustainability management reports and related data released by Korea Hydro & Nuclear Power were analyzed, and in-depth interviews were conducted with KHNP executives and employees to analyze Korea Hydro & Nuclear Power's global ESG management cases. As a result of the analysis, it was confirmed that Nepal's Chamehliya hydroelectric project provided infrastructure such as transportation, communication, and water to local residents and that efforts to improve the human rights and working environment of technical and functional personnel could be a model for global ESG management. In addition, Korea Hydro & Nuclear Power Co., Ltd., unlike domestic ESG management activities, is mainly concentrated in social fields (S) in overseas ESG activities, confirming the need to promote global management in all ESG fields, including environmental (E) and governance (G).
A Black Metal-dielectric Thin Film for High-contrast Displays
Sang-Hwan Cho,Min-Kyo Seo,강주형,Jin-Kyu Yang,Sung-Yong Kang,KyuHwan Hwang,ByoungDuk Lee,Joon-Gu Lee,Young-Woo Song,JongHyuk Lee,이용희 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
We demonstrate a thin metal-dielectric structure that delivers low reflection and high absorption over the entire visible spectrum. The thin black film consists of SiO2/Cr/SiO2/Al layers deposited on a glass substrate. The measured reflectance and absorptance of the black film are 0.7% and 99.3%, respectively, when averaged over the range 380 – 780 nm. The total thickness of the black film is only about 220 nm, and it can be used as a thin absorbing layer for displays that require both broadband antireflection and high-contrast characteristics.