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Li, Jinjie,Li, Yang,Yin, Zhigang,Jiang, Jihong,Zhang, Minghui,Guo, Xiao,Ye, Zhujia,Zhao, Yan,Xiong, Haiyan,Zhang, Zhanying,Shao, Yujie,Jiang, Conghui,Zhang, Hongliang,An, Gynheung,Paek, Namx2010,Cho John Wiley and Sons Inc. 2017 Plant biotechnology journal Vol.15 No.2
<P><B>Summary</B></P><P>Drought is one of the major abiotic stresses that directly implicate plant growth and crop productivity. Although many genes in response to drought stress have been identified, genetic improvement to drought resistance especially in food crops is showing relatively slow progress worldwide. Here, we reported the isolation of <I>abscisic acid</I>,<I> stress</I> and <I>ripening</I> (<I>ASR</I>) genes from upland rice variety, IRAT109 (<I>Oryza sativa</I> L. ssp. <I>japonica</I>), and demonstrated that overexpression of <I>OsASR5</I> enhanced osmotic tolerance in <I>Escherichia coli</I> and drought tolerance in <I>Arabidopsis</I> and rice by regulating leaf water status under drought stress conditions. Moreover, overexpression of <I>OsASR5</I> in rice increased endogenous ABA level and showed hypersensitive to exogenous ABA treatment at both germination and postgermination stages. The production of H<SUB>2</SUB>O<SUB>2</SUB>, a second messenger for the induction of stomatal closure in response to ABA, was activated in overexpression plants under drought stress conditions, consequently, increased stomatal closure and decreased stomatal conductance. In contrast, the loss‐of‐function mutant, <I>osasr5</I>, showed sensitivity to drought stress with lower relative water content under drought stress conditions. Further studies demonstrated that OsASR5 functioned as chaperone‐like protein and interacted with stress‐related HSP40 and 2OG‐Fe (II) oxygenase domain containing proteins in yeast and plants. Taken together, we suggest that <I>OsASR5</I> plays multiple roles in response to drought stress by regulating ABA biosynthesis, promoting stomatal closure, as well as acting as chaperone‐like protein that possibly prevents drought stress‐related proteins from inactivation.</P>
Decay constants of heavy meson of <sup>0−</sup> state in relativistic Salpeter method
Cvetix10d,, G.,Kim, C.S.,Wang, Guo-Li,Namgung, Wuk Elsevier 2004 Physics letters: B Vol.596 No.1
<P><B>Abstract</B></P><P>The decay constants of pseudoscalar heavy mesons of <SUP>0−</SUP> state are computed by means of the relativistic (instantaneous) Salpeter equation. We solved the full Salpeter equation without making any further approximation, such as ignoring the small component wave function. Therefore, our results for the decay constants include the complete relativistic contributions from the light and the heavy quarks. We obtain <SUB>F<SUB>Ds</SUB></SUB>≈248±27, <SUB>FD</SUB>≈230±25(<SUP>D0</SUP>,<SUP>D±</SUP>), <SUB>F<SUB>Bs</SUB></SUB>≈216±32, <SUB>FB</SUB>≈196±29(<SUP>B0</SUP>,<SUP>B±</SUP>), <SUB>F<SUB>Bc</SUB></SUB>≈322±42 and <SUB>F<SUB>ηc</SUB></SUB>≈292±25 MeV.</P>
Pham, Locx2010,Duyen D.,Hayakawa, Kazuhide,Seo, Ji Hae,Nguyen, Minhx2010,Nguyet,Som, Angel T.,Lee, Brian J.,Guo, Shuzhen,Kim, Kyux2010,Won,Lo, Eng H.,Arai, Ken Wiley Subscription Services, Inc., A Wiley Company 2012 GLIA Vol.60 No.6
<P><B>Abstract</B></P><P>After stroke and brain injury, cortical gray matter recovery involves mechanisms of neurovascular matrix remodeling. In white matter, however, the mechanisms of recovery remain unclear. In this study, we demonstrate that oligodendrocytes secrete matrix metalloproteinase‐9 (MMP‐9), which accelerates the angiogenic response after white matter injury. In primary oligodendrocyte cultures, treatment with the proinflammatory cytokine interleukin‐1β (IL‐1β) induced an upregulation and secretion of MMP‐9. Conditioned media from IL‐1β‐stimulated oligodendrocytes significantly amplified matrigel tube formation in brain endothelial cells, indicating that MMP‐9 from oligodendrocytes can promote angiogenesis <I>in vitro</I>. Next, we asked whether similar signals and substrates operate after white matter injury <I>in vivo</I>. Focal white matter injury and demyelination was induced in mice via stereotactic injection of lysophosphatidylcholine into corpus callosum. Western blot analysis showed that IL‐1β expression was increased in damaged white matter. Immunostaining demonstrated MMP‐9 signals in myelin‐associated oligodendrocytic basic protein‐positive oligodendrocytes. Treatment with an IL‐1β‐neutralizing antibody suppressed the MMP‐9 response in oligodendrocytes. Finally, we confirmed that the broad spectrum MMP inhibitor GM6001 inhibited angiogenesis around the injury area in this white matter injury model. In gray matter, a neurovascular niche promotes cortical recovery after brain injury. Our study suggests that an analogous oligovascular niche may mediate recovery in white matter. © 2012 Wiley Periodicals, Inc.</P>
Zhang, Z.H.,Fan, X.J.,Guo, H.X.,Zhang, W.,Zhang, C.Y.,Luo, F.Y. The Korean Vacuum Society 1998 Applied Science and Convergence Technology Vol.7 No.1
Amorphous ternary $Si_xC_yN-z$ thin films were obtained by plasma enhanced chemical vapor deposition(PECVD) using $N_2, SiH_4 \;and \;C_2H_4$ as the reaction sources. The chemical state were characterized by x-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy(FTIR). The optical properties of the thin films were investigated by UV-visible spectrophotometer and ellipsometer, and the optical band gaps of thin films were determined from corresponding transmittance spectra following Tauc equation.
Zhang, G.,Zhu, M.,Guo, J.,Ma, J.,Wang, X.,Lu, H.,Qiu, L. Elsevier Science 2014 ORGANIC ELECTRONICS Vol.15 No.10
A series of benzodithiophene (BDT) and benzotrithiophene (BTT)-based conjugated polymers (P1-P4), with/without conjugated- and acyl-side chain, have been synthesized by Stille cross-coupling reaction. Their thermal, photophysical, electrochemical properties, devices performances, and microstructure have been investigated. Conjugated-side chain can significantly raise the thermal stability and acyl-side chain can lower HOMO/LUMO energy levels. Organic thin-film transistors (OTFTs) based on conjugated polymers were fabricated and the transistor electrical characterization showed the device performance was sensitive to the conjugated- and acyl-side chain substituent of polymers. A maximum hole mobility of 1.70x10<SUP>-3</SUP>cm<SUP>2</SUP>V<SUP>-1</SUP>s<SUP>-1</SUP> was obtained for P1-based devices, which is an order of magnitude higher than those of P3 and P4-based devices. The corresponding microstructures were investigated by grazing-incidence X-ray diffraction (GIXD) to correlate with conjugated- and acyl-side chain dependent carrier mobility of P1-P4. The results showed that the conjugated- and acyl-side chain have an impact on the polymer packing models and device performances.
de Lorenzo, Ví,ctor,Prather, Kristala LJ,Chen, Guox2010,Qiang,O'Day, Elizabeth,von Kameke, Conrad,Oyarzú,n, Diego A,Hostax2010,Rigau, Leticia,Alsafar, Habiba,Cao, Cong,Ji, Weizhi,Okano John Wiley and Sons Inc. 2018 EMBO reports Vol.19 No.4
<P>The UN's Sustainable Development Goals present a challenge for biotechnology to develop new environmentally‐friendly and sustainable products and production processes. </P>