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Zhi-Bin Hu,He-An Luo,Xiao-Guang Wang,Ming-Zhi Huang,Lu Huang,Huai-Lin Pang,Chun-Hui Mao,Hui Pei,Chao-Qun Huang,Jiong Sun,Ping-Le Liu,Ai-Ping Liu 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
In attempt to lead compounds exhibiting both insecticidal and fungicidal activities, a series of O-benzyl oximeether derivatives were designed and synthesized by introducing β-methoxyacrylate pharmacophore into a scaffold. The insecticidal activity against Aphis fabae and the fungicidal activity against Erysiphe graminis were screened. The title compounds exhibited remarkable insecticidal and fungicidal activities. The most potent compound 6d was identified. Its insecticidal LC50 against A. fabae is 6.4 mg/L, which is lower than that of chlorfenapyr (19.4 mg/L) and even close to the level of imidacloprid (4.8 mg/L). Its fungicidal EC90 in preventive and curative treatment against E. graminis are 2.2 and 4.8 mg/L, respectively, which are lower than azoxystrobin (7.0 and 5.9 mg/L). These results indicate that compound 6d can be considered as a lead for further developing new O-benzyl oxime-ether typed candidates with both fungicidal and insecticidal activities.
Hu, Zhi-Bin,Luo, He-An,Wang, Xiao-Guang,Huang, Ming-Zhi,Huang, Lu,Pang, Huai-Lin,Mao, Chun-Hui,Pei, Hui,Huang, Chao-Qun,Sun, Jiong,Liu, Ping-Le,Liu, Ai-Ping Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
In attempt to lead compounds exhibiting both insecticidal and fungicidal activities, a series of O-benzyl oximeether derivatives were designed and synthesized by introducing ${\beta}$-methoxyacrylate pharmacophore into a scaffold. The insecticidal activity against Aphis fabae and the fungicidal activity against Erysiphe graminis were screened. The title compounds exhibited remarkable insecticidal and fungicidal activities. The most potent compound 6d was identified. Its insecticidal $LC_{50}$ against A. fabae is 6.4 mg/L, which is lower than that of chlorfenapyr (19.4 mg/L) and even close to the level of imidacloprid (4.8 mg/L). Its fungicidal $EC_{90}$ in preventive and curative treatment against E. graminis are 2.2 and 4.8 mg/L, respectively, which are lower than azoxystrobin (7.0 and 5.9 mg/L). These results indicate that compound 6d can be considered as a lead for further developing new O-benzyl oxime-ether typed candidates with both fungicidal and insecticidal activities.
Raman Spectral Band Oscillations in Large Graphene Bubbles
Huang, Yuan,Wang, Xiao,Zhang, Xu,Chen, Xianjue,Li, Baowen,Wang, Bin,Huang, Ming,Zhu, Chongyang,Zhang, Xuewei,Bacsa, Wolfgang S.,Ding, Feng,Ruoff, Rodney S. American Physical Society 2018 Physical Review Letters Vol.120 No.18
<P>Raman spectra of large graphene bubbles showed size-dependent oscillations in spectral intensity and frequency, which originate from optical standing waves formed in the vicinity of the graphene surface. At a high laser power, local heating can lead to oscillations in the Raman frequency and also create a temperature gradient in the bubble. Based on Raman data, the temperature distribution within the graphene bubble was calculated, and it is shown that the heating effect of the laser is reduced when moving from the center of a bubble to its edge. By studying graphene bubbles, both the thermal conductivity and chemical reactivity of graphene were assessed. When exposed to hydrogen plasma, areas with bubbles are found to be more reactive than flat graphene.</P>
Huang, Xiaoyong,Li, Bin,Du, Peng,Guo, Heng,Cao, Renping,Yu, Jae Su,Wang, Kai,Sun, Xiao Wei Elsevier 2018 Dyes and pigments Vol.151 No.-
<P><B>Abstract</B></P> <P>In this paper, we reported on multicolor emission tuning in Tb<SUP>3+</SUP> and Eu<SUP>3+</SUP> co-doped CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB> phosphors prepared by a traditional high-temperature solid-state reaction. Upon 380 nm ultraviolet excitation, the emission color of CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB>:Tb<SUP>3+</SUP>,Eu<SUP>3+</SUP> phosphors can be readily tuned from green to yellow, orange and finally to pure red through varying the concentration ratio of Eu<SUP>3+</SUP> and Tb<SUP>3+</SUP> ions. The energy transfer mechanism from Tb<SUP>3+</SUP> to Eu<SUP>3+</SUP> was systematically investigated by photoluminescence spectra, luminescence decay times, and time-resolved spectra. The internal quantum efficiencies of these phosphors were measured, and their thermal stability was also studied. A prototype white light-emitting diode (LED) device was fabricated by using an ultraviolet chip combined with a blend of blue-emitting BaMgAl<SUB>10</SUB>O<SUB>l7</SUB>:Eu<SUP>2+</SUP> phosphors, green-emitting BaSrSiO<SUB>4</SUB>:Eu<SUP>2+</SUP> phosphors, and red-emitting CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB>:50%Tb<SUP>3+</SUP>,50%Eu<SUP>3+</SUP> phosphors. All the results indicate that the CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB>:Tb<SUP>3+</SUP>,Eu<SUP>3+</SUP> has great potential application in lighting and displays.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB>:Tb<SUP>3+</SUP>,Eu<SUP>3+</SUP> showed efficient energy-transfer from Tb<SUP>3+</SUP> to Eu<SUP>3+</SUP>. </LI> <LI> CaGd<SUB>2</SUB>(WO<SUB>4</SUB>)<SUB>4</SUB>:Tb<SUP>3+</SUP>,Eu<SUP>3+</SUP> exhibited tunable color emission under 380 nm excitation. </LI> <LI> The energy-transfer mechanism was studied in detail. </LI> <LI> Quantum efficiency and thermal stability were investigated. </LI> <LI> The proof-of-concept LED lamps were fabricated by employing phosphors and UV LEDs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Ding, Xiao-Yu,Xu, Qiu,Zhu, Xiao-yong,Luo, Lai-Ma,Huang, Jian-Jun,Yu, Bin,Gao, Xiang,Li, Jian-Gang,Wu, Yu-Cheng Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12
Oxide dispersion-strengthened materials W-1wt%Pr<sub>2</sub>O<sub>3</sub> and W-1wt%La<sub>2</sub>O<sub>3</sub> were synthesized by wet chemical method and spark plasma sintering. The field emission scanning electron microscopy (FE-SEM) analysis, XRD and Vickers microhardness measurements were conducted to characterize the samples. The irradiations were carried out with a 5 keV helium ion beam to fluences up to 5.0 × 10<sup>21</sup> ions/m<sup>2</sup> under 600 ℃ using the low-energy ion irradiation system. Transmission electron microscopy (TEM) study was performed to investigate the microstructural evolution in W-1wt%Pr<sub>2</sub>O<sub>3</sub> and W-1wt%La<sub>2</sub>O<sub>3</sub>. At 1.0 × 10<sup>20</sup> He<sup>+</sup>/m<sup>2</sup>, the average loops size of the W-1wt%Pr<sub>2</sub>O<sub>3</sub> was 4.3 nm, much lower than W-1wt% La<sub>2</sub>O<sub>3</sub> of 8.5 nm. However, helium bubbles were not observed throughout in both doped W materials. The effects of pre-irradiation with 1.0 × 10<sup>21</sup> He<sup>+</sup>/m<sup>2</sup> on trapping of injected deuterium in doped W was studied by thermal desorption spectrometry (TDS) technique using quadrupole mass spectrometer. Compared with the samples without He<sup>+</sup> pre-irradiation, deuterium (D) retention of doped W materials increased after He<sup>+</sup> irradiation, whose retention was unsaturated at the damage level of 1.0 × 10<sup>22</sup>D<sub>2</sub><sup>+</sup>/m<sup>2</sup>. The present results implied that irradiation effect of He<sup>+</sup> ions must be taken into account to evaluate the deuterium retention in fusion material applications.
Stability of Hybrid Impulsive and Switching Stochastic Systems with Time-delay
Xuegang Tan,Bin Hu,Zhi-Hong Guan,Rui-Quan Liao,Jiang-Wen Xiao,Yuehua Huang 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.4
This paper investigates a model of hybrid impulsive and switching stochastic systems (HISSS) with time-delay. Several stability criteria, including the globally asymptotical and exponential stability criteria in the pth moment and mean square, are established by using Itô formula, a generalized switching Lyapunov functions and some relating techniques. Especially, a more general Lyapunov-Krasivskii functional is constructed, and it is observed that the mean square asymptotic and exponential stability conditions of HISSS are delay-dependent. A numerical example shows that the obtained stability results can reduce the conservativeness.
Effect of Microstructure on Mechanical Property of Carbon Steel/Strainless Steel Rolling Clad Plate
Li Hai-bin,Zhou Cun-long,Fan Xiao-ning,Kong Yi-gang,Huang Qing-xue,Ma Qin 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.11
The bonding interface microstructure and mechanical property of clad plate with different hot rolling schedules were researched. The results show that the carbide layer thickness of bonding interface increases firstly and then decreases with increasing reduction ratio. The carbide layer of bonding interface is the major factor relating to tensile strength, so the experimental values of clad plate are slightly higher than the calculated ones. Moreover, the bending strength of clad plate is mainly influenced by the thickness ratio and the carbide quantity of SS, while the carbide layer thickness of bonding interface is an important factor affects the bending strength.
A class of differential inverse quasi-variational inequalities in finite dimensional spaces
Li, Wei,Xiao , Yi-Bin,Huang , Nan-Jing,Cho , Yeol Je International Scientific Research Publications MY 2017 The journal of nonlinear science and applications Vol.10 No.8
<P>In this paper, we introduce and study a class of differential inverse quasi-variational inequalities in finite dimensional Euclidean spaces, which are closely related to the differential variational inequalities. By using two important theorems on differential inclusions, we first prove some existence theorems for Caratheodory weak solutions of the differential inverse quasi-variational inequality considered. Then, with the Euler computation method, we construct an Euler time-dependent scheme for solving the differential inverse quasi-variational inequality and prove a convergence result on the Euler time-dependent scheme constructed. (C) 2017 All rights reserved.</P>
A New Rhodamine-based Fluorescent Probe for the Discrimination of Fe3+ from Fe2+
Qi-Hua You,Hua-Bin Huang,Zhi-Xia Zhuang,Xiao-Ru Wang,Wing-Hong Chan 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.11
A new rhodamine-based fluorescent probe for the discrimination of Fe3+ from Fe2+ has been designed and investigated. The probe shows an immediate visual color change in response to Fe3+ and Cu2+, while only Fe3+ triggers the fluorescent change of the probe. The existence of large amount of other metal ions shows negligible interference in the detection of Fe3+. The association constant Kass of 4.64 × 108 M−2 (R2 = 0.994) and 5.38 × 108 M−2 (R2 = 0.991) of the complex was derived from UV/Vis and fluorescence titration assuming 1:2 stoichiometry of probe–Fe3+ complex, respectively.
Li Mao-Ye,Huang Yan,Lei Xiao,Xu Chuan-Tao,Li Bin,Chen De-Xin,Liu Su 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
Heat shock proteins (HSPs) play essential roles in stress tolerance in insects, such as the cigarette beetle, Lasioderma serricorne, which is an important pest of stored products. However, the function of HSPs in envi ronmental stress response in L. serricorne is poorly understood. In this study, six cDNAs encoding putative HSP70s were identified in L. serricorne (LsHSP70-1 to LsHSP70-6). The LsHSP70 proteins identified have signature motifs of insect HSP70s and exhibit high amino-acid identity with their respective orthologs from other insect species. Phylogenetic analysis showed that these LsHSP70s fall into three major clans: HSP70 in the cytosol (four genes), endoplasmic reticulum (one gene), and mitochondria (one gene). LsHSP70 genes are differentially expressed in different developmental stages. LsHSP70-4 and LsHSP70-5 are mainly expressed at the larval stage, while LsHSP70-3 shows the highest level at the pupal stage. The other genes are ubiquitously expressed. Furthermore, the expression levels of LsHSP70-1 and LsHSP70-4 are significantly upregulated upon exposure to temperatures of both 0 and 15 ◦ C, while LsHSP70-3 is inducible at 15 ◦ C and LsHSP70-6 at 0 ◦ C. In addition, treatment at 0 ◦ C causes significant downregulation of LsHSP70-2 and LsHSP70-3. Exposure to a temperature of 30 ◦ C upregulates LsHSP70-1 expression, while 35 and 40 ◦ C treatments result in significantly enhanced transcription of all the LsHSP70 genes. To the best of the authors’ knowledge, this is the first report on the sequence characteristics, phylogenetic relationships, and expression profiles of HSP70 genes in L. serricorne. The cold- and heat-inducible regulation of LsHSP70s suggests that these genes are related to tolerance of abnormal temperatures.