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安秉旭,李相鎬,李柄榮,金志洙 한밭대학교 산업과학기술연구소 1994 논문집 Vol.2 No.-
Dummy-Bar Head is used for continuous casting equipment. It is heated up at high temperature and cooled down repeatedly in using. Then the thermal extension by thermal stress and high temperature oxidation occur to it. This easily results in heating damage because Head, contact with melting metal, appears in micro-crack and tension force. In other words, it is material that gives the greatest influence in endurance life. The method of study is to compare and evaluate present material and improved material by the new alloy design. In conclusion, the results are as follows : 1) I think that the following range is suitable to chemical component. ◁표 삽입▷(원문을 참조하세요) 2) Micro-crack occurs in repeated heating and cooling owing to decarburization and thermal extension. Adding carbide stability elements-Cr, Mn, and V-shows martensite and less micro-crack. 3) Dummy-Bar Head is a large cast steel, An effective heat treatment condition is to heat step by step and to cool by force at 880℃. After that, It is effective to cool at 600∼680℃. 4) Improved product maintains the even hardness value. And impact value is over three times higher than present product for repeated heating and cooling. 5) The transition range over the fracture toughness value has smaller in improved product than present product for repeated heating and cooling. Through the fracture toughness evaluation, the characteristics of change is evaluated in materials. And we can make the predictable criteria of life with Refrica method. According to the analysis and investigation of the real condition is use, the improved product is accomplished in optimal alloying design and product processing, and satifies the required condition. I think that it is widely used as proper materials to a higher temperature concerning the economy.
尹廷洹,趙孝相,金成柱 수원대학교 산업기술연구소 1992 산업기술연구소논문집 Vol.7 No.-
In other to investigate α-1, 3 glucanase from microorganisms for hydrolysis of dental caries, S. muatns was immobilized by cubes of 28% polycrylamide and coated with same polyacrylamide. The insoluble glucan obtained 1.13g per one liter in TH medium with 5% sucrose by PA immobilization of S. muatns, which was very pure by IR and TLC analysis. α-1, 3 glucanase produced by of the Strptomyces SW-522, was developed by treatment with 5% EMS. The new Sw-522 M1 strain obtained, which improved activity of α-1, 3 glucanase.
A New High-Quality, Moisture Tolerance Rehmannia glutinosa Cultivar, “Segang”
Sang Hoon Lee(이상훈),Chun Geon Park(박춘근),Jeong Hoon Lee(이정훈),Yeon Bok Kim(김연복),Young Guk Kim(김영국),Seon Woo Cha(차선우),Gwan Hou Kim(김관후),Hyo Jin Kim(김효진),Chang Suk Huh(허창석),Sang Won Lee(이상원) 한국약용작물학회 2016 한국약용작물학회 학술대회논문집 Vol.2016 No.1
High Performance PbS Quantum Dot/Graphene Hybrid Solar Cell with Efficient Charge Extraction
Kim, Byung-Sung,Neo, Darren C. J.,Hou, Bo,Park, Jong Bae,Cho, Yuljae,Zhang, Nanlin,Hong, John,Pak, Sangyeon,Lee, Sanghyo,Sohn, Jung Inn,Assender, Hazel E.,Watt, Andrew A. R.,Cha, SeungNam,Kim, Jong Mi American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.22
<P/><P>Hybrid colloidal quantum dot (CQD) solar cells are fabricated from multilayer stacks of lead sulfide (PbS) CQD and single layer graphene (SG). The inclusion of graphene interlayers is shown to increase power conversion efficiency by 9.18%. It is shown that the inclusion of conductive graphene enhances charge extraction in devices. Photoluminescence shows that graphene quenches emission from the quantum dot suggesting spontaneous charge transfer to graphene. CQD photodetectors exhibit increased photoresponse and improved transport properties. We propose that the CQD/SG hybrid structure is a route to make CQD thin films with improved charge extraction, therefore resulting in improved solar cell efficiency.</P>
Sang Hoon Lee,Chun Geon Park,Jeong Hoon Lee,Yeon Bok Kim,Young Guk Kim,Seon Woo Cha,Gwan Hou Kim,Hyo Jin Kim,Chang Suk Huh,Sang Won Lee 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.05
Background : This study was development of moisture tolerance and high-yielding Rehmannia glutinosa cultivar. Methods and Results : Segang is developed by the medicinal crop breeding team of National Institute of Horticulture and Herbal Science(NIHHS), Rural Development Administration(RDA), during the period from 2005 to 2015. The reproduction of Rehmannia glutinosa has been accomplished mainly by vegetative propagation with its seedlings have many variants. The cultivar was selected from seedling of Jihwang 1(check variety). The plant type of Segang is some rising from ground. Regional yield trials conducted at three site from 2014 to 2015. The root yield of Segang was 21.1ton per hectare, which was increased 12% compared with Jihwang 1. Also, Segang has higher catalpol content and dried root ratio compared with Jihwang 1. Conclusion : Segang is a moisture tolerance and high-yielding Rehmannia glutinosa cultivar.
Crystal Structure of ScpB from Chlorobium tepidum, a Protein Involved in Chromosome Partitioning
Kim, Jeong-Sun,Shin, Dong Hae,Pufan, Ramona,Huang, Candice,Yokota, Hisao,Kim, Rosalind,Kim, Sung-Hou 이화여자대학교 약학연구소 2008 藥學硏究論文集 Vol.- No.17
Structural maintenance of chromo- some (SMC) Proteins are essential in chromosome condensation and interact with non-SMC proteins in eukaryotes and with segregation and condensation proteins (ScpA and ScpB) in prokaryotes. The highly conserved gene in Chlorobium tepidum gi 21646405 encodes ScpB (ScpB_ChTe). The high resolution crystal structure of ScpB_ChTe shows that the monomeric structure consists of two similarly shaped globular domains composed of three helices sided by β-strands [a winged helix-turn-helix (HTH)], a motif observed in the C-terminal domain of Scc1, a functionally related eukaryotic ScpA homolog, as well as in many DNA binding proteins, Proteins 2006;62:322-328. ⓒ 2005 Wiley-Liss, Inc.
On the mechanism of chaperone activity of the small heat-shock protein of Methanococcus jannaschii
Kim, Rosalind,Luhua Lai,Lee, Hi-Hong,Cheong, Gang-Won,Kim, Kyeong-Kyu,Zheng Wu,Hisao Yokota,Susan Marqusee,Kim, Sung-Hou Plant molecular biology and biotechnology research 2003 Plant molecular biology and biotechnology research Vol.2003 No.-
The small heat-shock protein (sHSP) from Methanococcus jannaschii (Mj HSP16.5) forms a homomeric complex of 24 subunits and has an overall structure of a multiwindowed hollow sphere with an external diameter of ≈120 Å and an internal diameter of ≈65 Å with six square "windows" of ≈17 Å across and eight triangular windows of ≈30 Å across. This sHSP has been known to protect other proteins from thermal denaturation. Using purified single-chain monellin as a substrate and a series of methods such as protease digestion, antibody binding, and electron microscopy, we show that the substrates bind to Mj HSP16.5 at a high temperature (80℃) on the outside surface of the sphere and are prevented from forming insoluble substrate aggregates in vitro. Circular dichroism studies suggest that a very small, if any, conformational change occurs in sHSP even at 80℃, but substantial conformational changes of the substrate are required for complex formation at 80℃. Furthermore, deletion mutation studies of Mj HSP16.5 suggest that the N-terminal region of the protein has no structural role but may play an important kinetic role in the assembly of the sphere by "preassembly condensation" of multiple monomers before final assembly of the sphere.