Description of a new species of the whitefly genus Pealius Quaintance & Baker (Hemiptera: Aleyrodidae) from China

Ji‐Rui Wang,Yu-Zhou Du,Jon H. MARTIN,Zhi-Hong XU 한국곤충학회 2018 Entomological Research Vol.48 No.5

A new whitefly species, Pealius yunnanensis sp. nov., collected from Mengzi, Caoba village (Yunnan, China) on Ficus microcarpa Linn. f. (Urticales: Moraceae), is described with morphology, line illustrations, photographs and scanning electron microscope images. In addition, a checklist of Chinese species of Pealius is provided and all Pealius species recorded from Ficus around the world are listed. Specimens have been deposited in the Insect Collection of Zhejiang Agriculture & Forestry University (ZAFU), Lin'an, China.

Molecular cloning, chromosomal localization and expression profiling of porcine selenoprotein M gene

Ji-Chang Zhou,Hua Zhao,Jia-Yong Tang,Jun-Gang Li,Xiao-Li Liu,Yu-Mei Zhu 한국유전학회 2011 Genes & Genomics Vol.33 No.5

Selenoprotein M may regulate a myriad of biological processes through its redox function. In pigs, neither the nucleotide sequence nor the amino acid sequence is known. Furthermore,patterns of tissue expression and regulation by dietary selenium (Se) have not been examined. We determined the full coding sequence (CDS) and the chromosomal location of the porcine gene, SELM, and described its expression profile in vivo under different dietary Se concentrations. The cDNA sequence of porcine SELM from the start codon to the poly(A) tail was cloned by reverse transcription PCR. The CDS contained 429bases with a typical mammalian selenocysteine insertion sequence of form 2 (F2) located in the 3′-untranslated region. The gene was mapped to chromosome 14q21, where porcine SELM and its neighboring genes exhibited a similar organization to human homologues on chromosome 22q12.2. The expression pattern of SELM mRNA in muscle, thyroid, cerebral cortex, pituitary, testis, liver, and kidney was analyzed with real-time quantitative PCR in young male pigs fed a Se-deficient corn-soybean meal basal diet supplemented with 0.0, 0.3,or 3.0 mg Se/kg in the form of Se-rich yeast. Though the SELM mRNA abundance in each of the 7 tissues was not affected by the dietary Se concentrations, it was significantly higher in thyroid (P < 0.01) than in cerebral cortex, pituitary,testis, liver, and kidney at all of the 3 dietary Se concentrations.

Rhynchophylline Down-regulates NR2B Expression in Cortex and Hippocampal CA1 Area of Amphetamine-induced Conditioned Place Preference Rat

Ji-Yin Zhou,Zhi-Xian Mo,Shi-Wen Zhou 대한약학회 2010 Archives of Pharmacal Research Vol.33 No.4

N-methyl-D-aspartate receptor 2B subunit (NR2B) has an important role in the development of conditioned place preference (CPP) and psychostimulant abuse. Rhynchophylline is presently used to treat central nervous systems diseases and has a non-competitive antagonistic effect on NMDA receptors. In this study, amphetamine was administered in rats (2 mg/kg, s.c., once each day for 4 consecutive days), during which they were treated with rhynchophylline (60 mg/kg, i.p., once each day for the next 3 days). NR2B mRNA and protein expression were examined by in situ hybridization and immunohistochemistry. CPP was induced by amphetamine (2 mg/kg, s.c.) by 4th day in rats. Rhynchophylline effectively reversed the expression of amphetamine-induced CPP and itself did not produce a CPP. Amphetamine-CPP rats showed a significantly increased NR2B mRNA and protein expression in medial prefrontal cortex and hippocampal CA1 areas as compared to the control group. Rhynchophylline reversed NR2B mRNA and protein levels induced by amphetamine but rhynchophylline by itself had no effect on NR2B expression in control rats. These results indicate that rhynchophylline inhibits the expression of amphetamine-induced rewarding effect, and this action might be related to down-regulation of NR2B expression in medial prefrontal cortex and hippocampal CA1 area.

Static Shape Adjustment and Actuator Layered Optimization for Planar Phased Array Satellite Antenna

Ji-Yang Zhou,Guang-Yu Lu,Guo-Ping CAI,Guang-Qiang Fang,Liang-Liang Lv,Jun-Wei Shi 한국항공우주학회 2019 International Journal of Aeronautical and Space Sc Vol.20 No.4

Shape accuracy is of great importance in space antennas, especially in large-scale planar phased array antenna. To maintain the performance of the planar phased array antenna, shape accuracy must be strictly controlled. This paper proposes an optimization method using diagonal cables as actuators to achieve the shape adjustment. As for shape control, actuator placement has a significant impact on the controlled shape accuracy. Misplaced actuators always lead to control problems, and the desired performance may not be achieved with any choice of control forces, so the actuator placement optimization is needed. The optimization problem is challenging because of the mixed discrete–continuous nature of design variables: the actuator placement corresponds to discrete variables and the control forces are continuous variables. A layered optimization method is proposed in this paper to solve the optimal actuator placement and the corresponding control forces. A genetic algorithm is applied in the outside layer to achieve the optimization of the actuator placement, and the quadratic programming method is used in the inside layer to get the corresponding optimal control forces. The proposed layered optimization method is successfully applied to the large-scale planar phased array antenna. Using this method, the influence of the number of actuators on the controlled shape accuracy is also studied.

HLA–DPB1 and DPB2 are genetic loci for systemic sclerosis: A genome-wide association study in Koreans with replication in North Americans

Zhou, Xiaodong,Lee, Jong Eun,Arnett, Frank C.,Xiong, Momiao,Park, Min Young,Yoo, Yeon Kyeong,Shin, Eun Soon,Reveille, John D.,Mayes, Maureen D.,Kim, Jin Hyun,Song, Ran,Choi, Ji Yong,Park, Ji Ah,Lee, Y Wiley Subscription Services, Inc., A Wiley Company 2009 Vol.60 No.12

<B>Objective</B><P>To identify systemic sclerosis (SSc) susceptibility loci via a genome-wide association study.</P><B>Methods</B><P>A genome-wide association study was performed in 137 patients with SSc and 564 controls from Korea using the Affymetrix Human SNP Array 5.0. After fine-mapping studies, the results were replicated in 1,107 SSc patients and 2,747 controls from a US Caucasian population.</P><B>Results</B><P>The single-nucleotide polymorphisms (SNPs) (rs3128930, rs7763822, rs7764491, rs3117230, and rs3128965) of HLA–DPB1 and DPB2 on chromosome 6 formed a distinctive peak with log P values for association with SSc susceptibility (P = 8.16 × 10<SUP>−13</SUP>). Subtyping analysis of HLA–DPB1 showed that DPB1*1301 (P = 7.61 × 10<SUP>−8</SUP>) and DPB1*0901 (P = 2.55 × 10<SUP>−5</SUP>) were the subtypes most susceptible to SSc in Korean subjects. In US Caucasians, 2 pairs of SNPs, rs7763822/rs7764491 and rs3117230/rs3128965, showed strong association with SSc patients who had either circulating anti–DNA topoisomerase I (P = 7.58 × 10<SUP>−17</SUP>/4.84 × 10<SUP>−16</SUP>) or anticentromere autoantibodies (P = 1.12 × 10<SUP>−3</SUP>/3.2 × 10<SUP>−5</SUP>), respectively.</P><B>Conclusion</B><P>The results of our genome-wide association study in Korean subjects indicate that the region of HLA–DPB1 and DPB2 contains the loci most susceptible to SSc in a Korean population. The confirmatory studies in US Caucasians indicate that specific SNPs of HLA–DPB1 and/or DPB2 are strongly associated with US Caucasian patients with SSc who are positive for anti–DNA topoisomerase I or anticentromere autoantibodies.</P>

Bond behavior between circular steel tube and high-strength concrete after elevated temperatures

Ji Zhou,Zongping Chen,Maogen Ban,Yunsheng Pang 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.84 No.5

In this paper, bond-slip behavior of high strength concrete filled circular steel tube (HSCFCST) after elevated temperatures treatment was studied. 17 specimens were designed for push-out test. The influence was discussed as following parameters: (a) concrete strength, (b) constant temperature, and (c) bond length. The results showed that (1) after elevated temperatures treatment, the bond strength of the HSCFCST specimens increased first and then decreased with temperature rising; (2) the bond strength increased with the increase of concrete strength at room temperature, while the influence subsided after elevated temperatures treatment; (3) the strain of the circular steel tube was distributed exponentially along its length, the stress changed from exponential distribution to uniform distribution with the increase of load; (4) the bond damage process was postponed with the increase of constant temperature; and (5) the energy consumption capacity of the bonding interface increased with the rise of concrete strength and constant temperature. Moreover, computational formulas of ultimate and residual bond strength were obtained by regression, and the bond-slip constitutive models of HSCFCSTs after elevated temperatures was established.

Boundary layer effect of light transmission through ionic liquid under electric field

Zhou Ji,Zheng Yi,Dong Shikui,He Zhihong,Liu Bao,Zhang Yanhu 한국물리학회 2023 Current Applied Physics Vol.52 No.-

The field strength distribution in the ionic liquid boundary layer under the action of an external electric field is non-uniform. Whether its transmittance (absorption coefficient) spatially varies arouses our interest in exploring the underlying laws. In this paper, with the help of an infrared microscope, a special experimental device was designed and established. The transmittance in the ionic liquid (methyl propyl imidazole iodide, C3MImI) at different distances from the electrodes (cathode, anode) was measured under electric voltages from 0 V to 0.5 V. Results showed that transmittances of ionic liquid at the boundary layer present nonlinear change with the nonlinear electronic strength under the different applied voltage, and there is a critical threshold (0.2 V) distinguishes the sensitive and non-sensitive responses to the electric field. Our study provides a physical basis for microscale electro-optic regulation and is significant, especially for precise regulation of light field transmittance in micro-nano channels/structures.

Residual behavior of SRRAC beam and column after exposure to high temperatures

Ji Zhou,Zongping Chen,Chunheng Zhou,Wei Zheng,Peihuan Ye 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.45 No.3

Composite effect between steel and recycled aggregate concrete (RAC) in steel reinforced-RAC (SRRAC) structures can effectively improve RAC’s adverse mechanical properties due to the natural defects of recycled coarse aggregate (RCA). However, the performance of SRRAC after thermal exposure will have a great impact on the safety of the structure. In this paper, firstly, the mechanical properties of SRRAC structures after high temperatures exposure were tested, including 24 SRRAC columns and 32 SRRAC beams. Then, the change rules of beams and columns performance with the maximum temperature and replacement percentage were compared. Finally, the formulas to evaluate the residual bearing capacity of SRRAC beams and columns after exposure to high temperatures were established. The experimental results show that the maximum exposure temperature can be judged by the apparent phenomenon and mass loss ratio of RAC. After high temperatures exposure, the mechanical properties of SRRAC beams and columns change significantly, where the degradation of bearing capacity and stiffness is the most obvious. Moreover, it is found that the degradation degree of compression member is more serious than that of flexural member. The formulas of residual bearing capacity established by introducing influence coefficient of material strength agree well with the experimental results.

Optimization of mix design of micro-concrete for shaking table test

Zhou, Ji,Gao, Xin,Liu, Chaofeng Techno-Press 2022 Advances in concrete construction Vol.13 No.3

Considering their similar mass densities, an attempt was made to optimize the mix design of micro-concrete that used barite sand as an aggregate by substituting marble powder (5%, 10%, 20%, 30%, 40%, 50%, 70%), clay brick powder (30%, 50%, 70%), and fly ash (30%, 50%, 70%) for the concrete (by mass) to form specimens for shaking table tests. The test results showed that for these three groups of materials, the substitutions had little effect on the density. The barite sand played a decisive role in the density, and the overall density of the specimens reached approximately 2.9 g/cm³. The compressive strength and elastic modulus decreased with an increase in the substitution rates for the three types of materials. Among them, the 28 day compressive strength values of the 40% and 50% marble powder groups were 11.73 MPa and 8.33 MPa, respectively, which were 58.7% and 70.7% lower than the control group, respectively. Their elastic modulus values were 1.33×10⁴ MPa and 1.42×10⁴ MPa, respectively, which were 39.1% and 35% lower than those of the control group, respectively. The 28 day compressive strength values of the 50% and 70% clay brick powder groups were 13.13 MPa and 5.8 MPa, respectively, which were 53.8% and 79.6% lower than the control group, respectively. Their elastic modulus values were 1.54×10⁴ MPa and 1.19×10⁴ MPa, respectively, which were 29.7% and 45.4% lower than those of the control group, respectively. The 28 day compressive strength values of the 50% and 70% fly ash groups were 13.5 MPa and 7.1 MPa, respectively, which were 52.5% and 75% lower than those of the control group, respectively. Their elastic modulus values were 1.36×10⁴ MPa and 0.95×10⁴ MPa, respectively, which were 37.9% and 56.6% lower than those of the control group, respectively. There was a linear relationship between the 28 day compressive strength and elastic modulus, with the correlation coefficient reaching a value higher than 0.88. The test results showed that the model materials met the high density, low compressive strength, and low elastic modulus requirements for shaking table tests, and the test data of the three groups of different alternative materials were compared and analyzed to provide references and assistance for relevant model testers.

Chaotic Dynamics of a Three-phase Clock-driven Oscillator with Dual Voltage Controllability

Ji Chao Zhou,송한정 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.8

In this work, we study a novel dual voltage controlled chaotic oscillator using a three-phase clock. The chaotic oscillator is based on two nonlinear functions which are needed for chaotic signal generation. The proposed chaotic circuit consists of non-overlapping clock driven three MOS (Metal Oxide Semiconductor) switches for S/H (sample and hold), a level shifter and two nonlinear functions for nonlinearity in the feedback. After optimizing of nonlinear functions for chaotic signal generation, the proposed circuit was simulated with SPICE (Simulation Program with Integrated Circuit Emphasis) program using a 0.6 um CMOS (complementary metal oxide semiconductor) process parameter. For various control voltages, its chaotic dynamics such as time waveform, bifurcation diagram and state transition diagram were analyzed. We confirmed that the circuit can generate discrete chaotic signals in specific control voltages. This circuit expected to be utilized for various chaos applications.