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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.
Synthesis and Biological Properties of Unsymmetrical N,N,N-Terdentates and Their Ru(Ⅲ) Complexes
Jahng, Yurngdong,Park, Jae Gyu,Kim, Hyun Hee 영남대학교 약품개발연구소 1998 영남대학교 약품개발연구소 연구업적집 Vol.8 No.-
Three unsymmetrical terdentates were converted to mono ruthenated complexes, Ru(L-N, N', N")Cl₃, where L. is 2-(2'-pyridyl)-1, 10-phenanthroline, 2-(2'-quinolyl)-1, 10-phenanthroline and 2-(2'-benzo[g]quinolyl)-1, 10-phenanthroline, and their in vitro cytotoxicities were tested.
Dietary Salt Modulates the Adrenocortical Expression of P450 11Beta-hydroxylase in Mice
Jahng, Jeong-Won,Youn, Bu-Hyun,Choi, Si-Ho,Moon, Young-Wha The Korean Society for Integrative Biology 2005 Integrative biosciences Vol.9 No.1
This study was conducted to determine the effect of dietary salt on the synthesis of glucocorticoids in the adrenal cortex of mice. Mice had ad libitum access to 3% sodium chloride as the only drinking fluid (high salt diet) for either 4 days or 4 weeks. Adrenocortical expression of cytochrome P450 11beta-hydroxylase, a major regulatory enzyme in the biosynthesis of glucocorticoids, was examined by immunohistochemistry and western blot analysis. Ultrastructure of adrenocortical cell and plasma level of corticosterone were analyzed as well. Size and density of lipid droplets in the cortical cell were increased by high salt diet. Four days of high salt diet decreased P450 11beta-hydroxylase in the adrenal cortex, but 4 weeks increased it. Plasma level of corticosterone changed in parallel with the Cortical level of P450 11 beta-hydroxylase. These results suggest that high salt diet may modulate the biosynthesis of glucocorticoids, at least partly, via regulating the expression of P450 11beta-hydroxylase in adrenocortical cells.