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Two Dimensional Transfer Modes in $CH_2$ Spin System
NamGoong Hyun Korean Magnetic Resonance Society 2006 Journal of the Korean Magnetic Resonance Society Vol.10 No.1
Spin-lattice relaxation pathway of $CH_2$ spin system by two dimensional NOESY sequence has been discussed. Two-dimensional spectra governed by dipolar relaxation mechanism were simulated in term of transfer mode, the generalization of conventionally used magnetization mode in one dimension. The transfer matrix directly related to the Redfield relaxation matrix can be constructed by the multiplet of transfer mode. The observable relaxation transfer modes causes to variation of the off-diagonal signal intensity of phase sensitive NOESY spectra from which variable spectral density can be extracted with simple group theoretical calculation. The variation of the J-coupling peak intensity as a function of the mixing time in 2-D spectra for $n-Undecane-5-^{13}C$ and Bromoacetic $2-^{13}C$ acid has been theoretically traced.
The Prolyl Isomerase Pin1 Induces LC-3 Expression and Mediates Tamoxifen Resistance in Breast Cancer
Namgoong, G.M.,Khanal, P.,Cho, H.-G.,Lim, S.-C.,Oh, Y.K.,Kang, B.S.,Shim, J.-H.,Yoo, J.-C.,Choi, H.S. The American Society for Biochemistry and Molecula 2010 The Journal of biological chemistry Vol.285 No.31
Analysis of the Traditional Setting-up as an Application for Spatial Composition
NamGoong, Sun,Lee, Yu-Ri Korea Furniture Society 2010 한국가구학회지 Vol.21 No.3
Recently, there is a new issue, among the contemporary people, for new life style, such as green design and well being. This trend brought up the necessity that there should be alternatives for interior spatial design. In order to catch up with these new issues, the new convenient and environment friendly methods are in need. Space composition using setting-up is skill that can express both the structural aspect and esthetic because it represents traditional beauty into the contemporary age through the structural rigidity and formal beauty. Also the lumber, as main materials for setting up, is in line with well being life style and environment friendliness. The construction of structure by setting-up has advantages in terms of the reuse and the convenience in that the construction of structure is adjustable according to environment. And setting-up has enough plasticity not only because of its own role as linking the objects but also because of being framed by itself. Therefore setting-up will be a design element, if it is expressed outward. Thus, this study aims to give a guide line about how to apply the result from the evaluating that "what is the most suitable setting-up" and "what is the most suitable detail setting-up", based on that structural rigidity, decorativeness and the ease of works. As a result of evaluation, the most excellent types of setting-up in terms of structural rigidity are "Jangbu" and "Panjae" and "Yeongui". The most excellent types of setting-up in terms of decorativeness are "Panjae" and "Yeongui", and the most excellent type of the ease of work is "Mat". And also the most applicable detail setting-up for the utilization of spatial composition is proposed.
Micro-Chemical Structure of Polyaniline Synthesized by Self-Stabilized Dispersion Polymerization
NamGoong, Hyun,Woo, Dong-Jin,Lee, Suck-Hyun The Polymer Society of Korea 2007 Macromolecular Research Vol.15 No.7
A variety of NMR techniques were applied to the micro-chemical structural characterization of polyanilines prepared via an efficient synthetic method in a self-stabilized dispersion medium in which the polymerization was conducted in a heterogeneous organic/aqueous biphasic system without any stabilizers. Here, the monomer and growing polymer chain were shown to function simultaneously as a stabilizer, imparting compatibility for the dispersion of the organic phase, and as a form of flexible template in an aqueous reaction medium. Polymerizations predicated on this concept generated polyanilines with a low defect content: solution state $^{13}C-NMR$ and solid $^{13}CDD/CP/MAS$ spectroscopy indicated that the synthesized HCPANi and its soluble derivative, HCPANi-t-BOC, evidenced distinctly different NMR spectra with fewer side peaks, as compared to conventionally prepared PANis, and the complete structural assignments of the observed NMR peaks could be determined via the combination of both 1D and 2D techniques. Ortho-linked defects in HCPANi were estimated to be as low as 7%, as shown by a comparison of the integration of the carbonyl carbon resonance peaks.
Roles of actin binding proteins in mammalian oocyte maturation and beyond
Namgoong, Suk,Kim, Nam-Hyung Informa UK (TaylorFrancis) 2016 Cell Cycle Vol.15 No.14
<P>Actin nucleation factors, which promote the formation of new actin filaments, have emerged in the last decade as key regulatory factors controlling asymmetric division in mammalian oocytes. Actin nucleators such as formin-2, spire, and the ARP2/3 complex have been found to be important regulators of actin remodeling during oocyte maturation. Another class of actin-binding proteins including cofilin, tropomyosin, myosin motors, capping proteins, tropomodulin, and Ezrin-Radixin-Moesin proteins are thought to control actin cytoskeleton dynamics at various steps of oocyte maturation. In addition, actin dynamics controlling asymmetric-symmetric transitions after fertilization is a new area of investigation. Taken together, defining the mechanisms by which actin-binding proteins regulate actin cytoskeletons is crucial for understanding the basic biology of mammalian gamete formation and pre-implantation development.</P>
Effects of Isoflavonoids on Mouse Lymphocyte Proliferation In Vitro
Namgoong, Soon-Young,Lee, Chang-Hee,Lim, Hyun-Pyo The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.4
The suppressive activity of isoflavonoids against lymphocyte proliferation in vitro was examined. Isoflabvonoid derivatives tested were isflavones isolated from Pueraia radix and synthesized 7-O-substituted biochanin A derivatives. The certain isoflavones such as biochanin A and 2-carbethoxybiochainin A were found to possess the suppressive activity against concanavaline A (Con A)-induced lymphocyte proliferation from mouse spleen. Against mixed lymphocyte culture reaction, biochanin A, 2-carbethoxybiochainin A, daidzein, formononetin, genistein and 7-O-isopropylbiochaninl A showed the suppressive activity at $10^{-5}$ M. However, all isoflavones tested did not show the suppressive activity against lymphocyte proliferation induced by B-cell mitogen, lipopolysaccharide (LPS). In general, isoflavones were revealed to be less active than flavones/flavonols.
Namgoong Jung-Man,Hwang Shin,Kim Dae-Yeon,Ha Tae-Yong,Song Gi-Won,Jung Dong-Hwan,Kim Kyung Mo,Oh Seak Hee 대한이식학회 2021 Korean Journal of Transplantation Vol.35 No.1
Congenital absence of the portal vein (CAPV) is a rare venous malformation in which mesenteric venous blood drains directly into systemic circulation. Herein, we report a case of pediatric deceased donor liver transplantation (DDLT) for symptomatic CAPV with whole liver graft from a hepatitis B surface antigen (HBsAg)-positive donor. A 4-year-old boy suffered from CAPV and secondary portal hypertension. He was also diagnosed with DiGeorge syndrome and heart anomalies. After waiting for 4 months, a 5-year-old donor weighing 19 kg with positive HBsAg was allocated to this 4-year-old patient weighing 15 kg. Recipient operation was performed according to the standard procedures of pediatric DDLT. Portal vein reconstruction was performed using interposition of a vascular homograft conduit to the superior mesenteric vein-splenic vein confluence. The patient recovered uneventfully from DDLT. He has been administered with lamivudine to prevent hepatitis B virus infection. This patient has been doing well for 5 years after DDLT without growth retardation. In conclusion, CAPV patients can have various vascular anomalies, thus combined vascular anomalies should be thoroughly assessed before and during liver transplantation operation. The most effective reconstruction techniques should be used to achieve satisfactory results following liver transplantation.
Namgoong, Jin Woong,Chung, Sei-Won,Jang, Hyeyoun,Kim, Young Hoon,Kwak, Moo Sun,Kim, Jae Pil Elsevier 2018 Journal of industrial and engineering chemistry Vol.58 No.-
<P><B>Abstract</B></P> <P>Four synergists were synthesized to enhance pigment nanoparticles dispersion and the contrast ratio. The interaction between the synergist and the dispersant was confirmed by infra-red (IR) spectrometry. We demonstrate that the hydrogen bonds forming between the synergist and the dispersant act as a key factor. To analyze the dispersion properties, dynamic light scattering (DLS), and electron microscopic analysis was examined. The spectral and color characteristics was also measured by UV–vis spectrometry and colorimetry, and the contrast ratio of color filters was evaluated. This study confirms that the prepared synergist can increase the contrast ratio of green color filter.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>