http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Magnetic Resonance Imaging: Historical Overview, Technical Developments, and Clinical Applications
Jahng, Geon-Ho,Park, Soonchan,Ryu, Chang-Woo,Cho, Zang-Hee Korean Society of Medical Physics 2020 의학물리 Vol.31 No.3
The authors congratulate the cerebrations for the 30 years of the Korean Society of Medical Physics (http://www.ksmp.or.kr/). The paper is published to recognize the anniversary. Geon-Ho Jahng invited Professor Z. H. Cho to join to submit this manuscript because he has been one of the leaders in the field of magnetic resonance imaging (MRI) during the last 40 years. In this review, we describe the development and clinical histories of MRI internationally and domestically. We also discuss diffusion and perfusion MRI, molecular imaging using MRI and MR spectroscopy (MRS), and the hybrid systems, such as positron emission tomography-MRI (PET-MRI), MR-guided focused ultrasound surgery (MRgFUS), and MRI-guided linear accelerators (MRI-LINACs). In each part, we discuss the historical evolution of the developments, technical developments, and clinical applications.
The reaction of (E)-2, 4-pentadienoic acid with aqueous bromine re-evaluation of the product
Jahng, Yurng-Dong,Kim, Jin-Il The Pharmaceutical Society of Korea 1989 Archives of Pharmacal Research Vol.12 No.3
The reaction of (E)-2, 4-pentadienoic acid with aqueous bromine was reinvestigated to affirm the formation of (E)-5-bromo-4-hydroxy-2-pentenoic acid, whose structure was confirmed by the spectroscopic methods as well as the chemical modification.
The X-ray Crystal Structure of 3, 3' ; 5', 3"-Bis(tetramethylene)-2, 2' ; 6' 2"-terpyridine
Jahng, Yurngdong 영남대학교 자원문제연구소 1994 資源問題硏究 Vol.13 No.-
To help better understand the conformational as well as structural features. a single crystal X-ray analysis of 3,3'; 5',3"-bis(tetrHmethylene)-2,2': 6',2"-terpyridine was undertaken to show this molecule retains Cn symmetry and exists in the monoclinic space group. P2lf.. with four molecules per unit cell, and a = 9.036(4) A, b = 16.741(8) A. c = 12.217(6) A, and☞ = 107.09(3) " as cell constants.
Jahng, Yurng-Dong,Kim, Jin-Il The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.2
trans-Ethyl 1, 2, 3, 4a, 5, 6, 8a-cotahydro-2-benzyl-4-hydroxy-6-methyl-5-isoquinoline-carboxylate was prepared by intramolecular Diels-Alder reaction as a precusor of newly designed aza-analogue of mevinolin.
Synthesis and Properties of Terdentatee with Extra Pyridine Ring and Their Ru(Ⅱ) Complexes
Jahng, Yurngdong,Moon, Seung Wook,Thummel, Randolph P. 영남대학교 약품개발연구소 1997 영남대학교 약품개발연구소 연구업적집 Vol.7 No.-
The synthesis and electronic as well as redox properties of four Ru(Ⅱ) complexes based on the ligand 4'-(4-pyridyl)-3.3';5',3"-bis-dimethylene-2,2‘;6’,2“-terpyridine are reported. Each new complex is of the type [Ru(L)₂]^(??+) and [Ru(tpy)(L)]^(??+), where L is the terdentate ligand with extra pyridine ring at 4¹-position or is a N-methylated ligand and n=2, 3, or 4. Cyclic voltammetry indicates that the first electron added to the complex enters the viologen-type acceptor in N-methylated ligand.
The α-subunit of a Saccharomyces cerevisiae G protein plays a role in mating pheromone signaling
Jahng, Kwang Yeop 한국균학회 1988 韓國菌學會誌 Vol.16 No.3
G proteins represent a group of highly homologous proteins involved in receptor mediated signal transduction. They apparently serve as informational transducers between a diverse group of cell surface receptors and an equally diverse assortment of second message effectors. In vertebrates, G proteins have been to be ubiquitous in terms of their tissue and phylogenetic distribution. Mutations which allowed conjugation by Saccharomyces cerevisiae cells lacking a mating pheromone receptor gene were selected. One of the genes defined by such mutations was isolated from a yeast genomic library by complementation of a is mutation and is identical to the gene GPA1 (also known as SCG1), recently shown to be highly homologous to genes encoding the subunits of mammalian G proteins. Physiological analysis of temperature sensitive gpal mutations suggests that the encoded G protein is involved in signalling in response to mating pheromones. Mutational disruption of G protein activity causes cell cycle arrest in G1, deposition of mating-specific cell surface agglutinins and induction of pheromone-specific mRNAs, all of which are responses to pheromone in wild type cells. In addition, mutants can conjugate without the benefit of mating pheromone or pheromone receptor.
Jahng, Yurngdong,Kim, Jin-Il 영남대학교 약품개발연구소 1994 영남대학교 약품개발연구소 연구업적집 Vol.4 No.-
trans-Ethyl 1, 2, 3, 4a, 5, 6, 8a-octahydro-2-benzyl-4-hydroxy-6-methyl-5-isoquinoline-carboxylate was prepared by intramolecular Diels-Alder reaction as a precursor of newly designed aza-analogue of mevinolin.
An Effect Synthetic Route to Chiral β-Hidroxy-δ- Lactone Moiety of Compactin
Jahng, Yurngdong,Kim, Jin-Il 영남대학교 약품개발연구소 1991 영남대학교 약품개발연구소 연구업적집 Vol.1 No.-
A new synthetic sequence for the chiral lactone moiety of compactin was developed from α-D-glucose in 9 steps via simultaneous reductive detosylation and epo-xide-ring opening of 2, 3-epoxy-4-tosylate using NaBH₄ to afford 2, 4-dideoxy sugar as a key intermediate.