http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
New Constitutively Active Phytochromes Exhibit Light-Independent Signaling Activity
Jeong, A-Reum,Lee, Si-Seok,Han, Yun-Jeong,Shin, Ah-Young,Baek, Ayoung,Ahn, Taeho,Kim, Min-Gon,Kim, Young Soon,Lee, Keun Woo,Nagatani, Akira,Kim, Jeong-Il American Society of Plant Biologists 2016 PLANT PHYSIOLOGY - Vol.171 No.4
<P>Plant phytochromes are photoreceptors that mediate a variety of photomorphogenic responses. There are two spectral photoisomers, the red light-absorbing Pr and far-red light-absorbing Pfr forms, and the photoreversible transformation between the two forms is important for the functioning of phytochromes. In this study, we isolated a Tyr-268-to-Val mutant of Avena sativa phytochrome A (AsYVA) that displayed little photoconversion. Interestingly, transgenic plants of AsYVA showed light-independent phytochrome signaling with a constitutive photomorphogenic (cop) phenotype that is characterized by shortened hypocotyls and open cotyledons in the dark. In addition, the corresponding Tyr-303-to-Val mutant of Arabidopsis (Arabidopsis thaliana) phytochrome B (AtYVB) exhibited nuclear localization and interaction with phytochrome-interacting factor 3 (PIF3) independently of light, conferring a constitutive photomorphogenic development to its transgenic plants, which is comparable to the first constitutively active version of phytochrome B (YHB; Tyr-276-to-His mutant). We also found that chromophore ligation was required for the light-independent interaction of AtYVB with PIF3. Moreover, we demonstrated that AtYVB did not exhibit phytochrome B activity when it was localized in the cytosol by fusion with the nuclear export signal and that AsYVA exhibited the full activity of phytochrome A when localized in the nucleus by fusion with the nuclear localization signal. Furthermore, the corresponding Tyr-269-to-Val mutant of Arabidopsis phytochrome A (AtYVA) exhibited similar cop phenotypes in transgenic plants to AsYVA. Collectively, these results suggest that the conserved Tyr residues in the chromophore-binding pocket play an important role during the Pr-to-Pfr photoconversion of phytochromes, providing new constitutively active alleles of phytochromes by the Tyr-to-Val mutation.</P>
Jeong, Yun-Seong,Kim, Soon-Young,Jin, Geun-Woo,An, Song-Hie,Lee, Jae-Han,Jeong, A-Reum,Chio, Yeon-Soon,Hong, Jong-In,Park, Jong-Sang Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.9
The accurate determination of bisphosphonate levels in bone and biological fluids is important in both clinical and pharmacological/toxicological studies; however, the quantitative analysis of the bisphosphonate is difficult because its concentration is quite low in most of biological sample. A novel fluorescent chemosensor (FCS)-based measurement method of bisphosphaonate levels using Naphta-diDPA-$2Zn^{2+}$ (NadDPA-$2Zn^{2+}$, DPA = dipycolylamine), an excellent FCS previously used for detecting PPi, was developed. By the FCS method, the concentration of bisphosphonates having no fluorophores can be determined analyzed with sufficient sensitivity. The results of this study indicate that the FCS-based measurement can be a useful method to analyze bisphosphonates in biological samples.
Chemical Mechanical Planarization of Copper Bumps on Printed Circuit Board
Jeong, Moon-Ki,Jo, Seung-Jae,Lee, Hyun-Seop,Lee, Ah-Reum,Kang, Chung-Yun,Choi, Jin-Won,Kim, Jin-Ho,Jeong, Hae-Do 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.1
This paper deals with the planarization of copper bumps to improve the bonding performance and reliability of printed circuit board (PCB) manufacturing to improve by using flip chip during the fabrication process of the PCB. Authors tried to develop a novel planarization process using polishing techniques before the continuous process at the PCB fabrication. An experiment was implemented by mechanical polishing (MP) using alumina abrasives mixed with deionizer water (DIW), and by chemical mechanical polishing (CMP) added with oxidizer of HF. CMP showed superior results to MP with mirror surface less than Ra 3nm and minimum step height deviation of 1um, resulting in high bonding performance and reliability. Therefore, CMP is a strong tool for reserving a sufficient margin in the PCB manufacture process.
Jeong Yeon Im,Jeong-Sook Choe,Kyung-A Hwang,Pu Reum Im 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
In this study, the anti-inflammatory activity of ginger (Zingiber officinale Roscoe) leaves and stems, which were registered as food ingredients by Rural Development Administration (RDA) in 2017, were evaluated nitric oxide (NO) production decreased dose-dependently. It was especially decreased by 7.80% in ginger leaves (250 μg/mL). In addition, the expression of tumor necrosis factor-α (TNF-α) also decreased dose-dependently by 16.74% only with ginger leaves, indicating their enhanced anti-inflammatory effects. Extracts of ginger leaves (2.80%) and stems (1.75%) improved the anti-inflammatory response by decreasing the level of interleukin-6 (IL-6) in a dose-dependent manner. These results indicate that the ginger leaves and stems have anti-inflammatory effects. Therefore these agricultural products suggest their possible use as functional health food.
Psychological Aspects of Glaucoma
Jeong, Ah Reum,Kim, Chan Yun,Kang, Min Hee,Kim, Na Rae Wolters Kluwer Health, Inc. All rights reserved. 2016 The Journal of nervous and mental disease Vol.204 No.3
<P>Glaucoma is a group of optic neuropathies that is more prevalent among the elderly population and commonly associates with comorbidities, including mental disorders in that population. This article reviews the relationship between glaucoma and mental disorders. In it, we discuss the coexistence of glaucoma and mental illnesses, including Alzheimer's disease, depression, and personality disorder. We also focus on the proper treatment approaches for glaucoma patients with mental comorbidity and poor treatment adherence. We summarize some cautiously recommended psychotherapeutic medications, while also discussing the psychologically adverse effects of antiglaucoma medications.</P>
Jeong, Yeon ,Hee,Chung, Soo ,Yeon,Han, Ah-Reum,Sung, Min ,Kyung,Jang, Dae ,Sik,Lee, Jun,Kwon, Youngjoo,Lee, Hwa ,Jeong,Seo, Eun-Kyoung VERLAG HELVETICA CHIMICA ACTA AG 2007 Chemistry & Biodiversity Vol. No.
<P>(−)-Syringaresinol and tricin, isolated from the AcOEt-soluble extract of the whole plants of Sasa borealis (Gramineae), showed inhibitory effects on the P-glycoprotein in adriamycin-resistant human breast cancer cells, MCF-7/ADR.</P>