DSpace Collection:https://pubs.kist.re.kr/handle/123456789/753632026-04-15T18:22:23Z2026-04-15T18:22:23ZChiral Phosphites Derived from Carboranes: Electronic Effect in Catalytic Asymmetric HydrogenationLyubimov, Sergey E.Kalinin, Valery N.Tyutyunov, Andrey A.Olshevskaya, Valentina A.Dutikova, Yulia V.Cheong, Chan SeongPetrovskii, Pavel V.Safronov, Anton S.Davankov, Vadim A.https://pubs.kist.re.kr/handle/201004/1328592024-04-25T20:30:05Z2009-01-01T00:00:00ZTitle: Chiral Phosphites Derived from Carboranes: Electronic Effect in Catalytic Asymmetric Hydrogenation
Authors: Lyubimov, Sergey E.; Kalinin, Valery N.; Tyutyunov, Andrey A.; Olshevskaya, Valentina A.; Dutikova, Yulia V.; Cheong, Chan Seong; Petrovskii, Pavel V.; Safronov, Anton S.; Davankov, Vadim A.
Abstract: A series of new fine-tunable monodentate phosphite and phosphoramidite ligands based on carboranes have been synthesized and used for asymmetric Rh-catalyzed hydrogenation of prochiral olefins with the result of up to 99.8% ee. Dependence of the enantio selectivity on the electron-withdrawing or electron-donating properties of the carboranyl substituent has been studied. Chirality 21:2-5, 2009. (C) 2008 Wiley-Liss, Inc.2009-01-01T00:00:00ZInsight into the antibacterial drug design and architectural mechanism of peptide recognition from the E. faecium peptide deformylase structureNam, Ki HyunIl Ham, JungPriyadarshi, AmitKim, Eunice EunkyeongChung, NamHyunHwang, Kwang Yeonhttps://pubs.kist.re.kr/handle/201004/1328582024-04-25T20:08:53Z2009-01-01T00:00:00ZTitle: Insight into the antibacterial drug design and architectural mechanism of peptide recognition from the E. faecium peptide deformylase structure
Authors: Nam, Ki Hyun; Il Ham, Jung; Priyadarshi, Amit; Kim, Eunice Eunkyeong; Chung, NamHyun; Hwang, Kwang Yeon2009-01-01T00:00:00ZFracture toughness study of new Zr-based Be-bearing bulk metallic glassesKim, C. PaulSuh, Jin-YooWiest, AaronLind, Mary LauraConner, R. DaleJohnson, William L.https://pubs.kist.re.kr/handle/201004/1328572024-04-25T20:08:50Z2009-01-01T00:00:00ZTitle: Fracture toughness study of new Zr-based Be-bearing bulk metallic glasses
Authors: Kim, C. Paul; Suh, Jin-Yoo; Wiest, Aaron; Lind, Mary Laura; Conner, R. Dale; Johnson, William L.
Abstract: Three new compositional variants of the Zr-Ti-Be-LTM (late transition metal) family of metallic glasses are discussed. Thermal stability Delta T=T-x-T-g, was increased from 82 degrees C for Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Viterloy 1) to 141 degrees C for Zr44Ti11Cu20Be25. It is found that fracture toughness is the most distinguishing parameter characterizing the alloys in contrast to other mechanical properties. Quaternary alloys consistently had fracture toughness values exceeding 80 MPa m(1/2), while for Vitreloy 1 K-Q = 48.5 MPa m(1/2) with a large amount of scatter. Adding iron reduced the fracture toughness to 25 MPa m(1/2). (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.2009-01-01T00:00:00ZResponse surface methodology for eicosanoic acid triboproperties in castor oilOssia, C. V.Han, H. G.Kong, H.https://pubs.kist.re.kr/handle/201004/1328562024-04-25T20:08:45Z2009-01-01T00:00:00ZTitle: Response surface methodology for eicosanoic acid triboproperties in castor oil
Authors: Ossia, C. V.; Han, H. G.; Kong, H.
Abstract: Response surface methodology with Box-Benhken (BB) design of experiment is utilized to study the antiwear (AW) and lubricity properties of eicosanoic acid in biodegradable castor oil base-stock and the results were compared with those of zinc dialkyldithiophosphate (ZDTP) and octadecanoic acid. The designs utilize load, additive concentration and temperature to develop models for the antiwear and lubricity response in a four-ball configuration. This was done by performing statistically designed experiments, estimating the coefficients in the mathematical models, predicting the response, checking for adequacy of the model and response optimization. Comparison of predicted and experimental response values outside the design conditions and for the optimal wear conditions showed good correspondence, implying that empirical models derived from response surface approach can be used to describe the tribological behavior of the additives in castor oil base-stock. Eicosanoic acid showed good tribological properties comparable to the popular octadecanoic acid and ZDTP lubricant additives, without acidic corrosion phenomenon as in ZDTP. (C) 2008 Elsevier Ltd. All rights reserved.2009-01-01T00:00:00Z