Screening of the Antigen Epitopes of Basic Fibroblast Growth Factor by Phage Display

Jun Jian Xiang,Zhen Yu Zhong,Ning Deng,Zhen Dong Zhong,Hong Yu Yang 한국생활환경학회 2005 BMB Reports Vol.38 No.3

Kinematic Stability of Tunnel Face in Non-uniform Soils

Jun-Hao Zhong,Xiao-li Yang 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.2

In the paper, the kinematic analysis is carried out to evaluate the face stability of shallow tunnel in the framework of plasticity theory. In view of the non-uniformity of soil strength parameters, a discretization technique is introduced to generate possible failure mechanisms which respect the associative flow rule and requirement of the non-uniformity of soil strength parameters. As an earthquake situation is considered, a pseudo-dynamic method is adopted to portray the distribution of seismic acceleration. Some comparisons are made to the conventional analysis, including discretization-based pseudo-static analysis and log-spiral-based pseudo-static analysis, to prove the validity of the programming code and accuracy of the proposed method. The soil strength parameters are considered varying in the vertical direction. The effect of distribution of strength parameters is discussed, and distribution form is initially assumed to be linear profile and, then, to be other nonlinear functional profile, including power profile, constant profile and quadratic profile. The results derived from further parametric study show that although the influence of horizontal seismic coefficient is more significant than the vertical one, the vertical effect cannot be ignored in most circumstances, and some factors affect the stability cyclically. In addition, in the linear profile of soil strength parameters, the influence of gradient on supporting pressure is rather small comparing to the average. The influence of non-uniformity of soil strength parameters and seismic parameters on the shape and collapsed area of the failure mechanism is successively studied in this paper. All the optimized solutions are presented in the figures and tables for practical application.

Stability Analysis of 3D Deep Tunnel Face under Steady Seepage Flow Condition

Jun-Hao Zhong,Hong Liao 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.5

The instabilities of tunnel face may occur while shields advance through the rivers or region rich in water. It is of significance to attach the importance to the estimation of face stability during the tunnel excavation. Thus, this paper adopted a three-dimensional (3D) rotational mechanism to analyze the face stability under steady seepage flow field with the aid of the kinematic method in the context of limit analysis. The hydraulic head that derived by fitting the results of trial and error is employed herein to portray the steady seepage flow field. With the aid of a double integration method, the work rate induced by seepage forces acting on the soil skeleton is calculated and accordingly a closed-form solution of support pressure is derived based on the work balance equation. By comparing with the literature, one can validate the rationality and correctness of the present results. The research shows that the proposed method based on rotational mechanism provides a better upper bound estimation, when under seepage condition, the influence of internal frictional angle on the stability of the excavation face is not always monotonic and the influence of head difference on the support pressure is significant. Finally, the normalized stability charts are provided for a quick assessment for practical use during tunnel excavation in water-rich stratum.

Improved photocatalytic performance of Pd-doped ZnO

Jun bo Zhong,Jian zhang Li,Xi yang He,Jun Zeng,Yan Lu,Wei Hu,Kun Lin 한국물리학회 2012 Current Applied Physics Vol.12 No.3

ZnO and Pd-doped ZnO photocatalysts with different molar ratio of Pd/Zn (1/100, 2/100, 3/100 and 4/100) were prepared by a solegel method. The photocatalysts prepared were characterized by BET surface area, X-ray diffraction (XRD), UV/vis diffuse reflectance (DRS) and surface photovoltage spectroscopy (SPS), respectively. The results show that doping Pd into ZnO decreases the BET surface area. The XRD spectra of the Pd-doped ZnO catalysts calcined at 773 K show only the characteristic peaks of wurtzite-type. Doping Pd into ZnO increases the absorbance of ZnO in visible region and enhances the photoinduced charge separation rate. The photocatalytic activity of Pd-doped ZnO photocatalysts for decolorization of methyl orange (MO) solution was evaluated, of all the photocatalysts prepared, the Pddoped ZnO with 3/100 possesses the best photocatalytic activity. The results of further experiments show that increased adsorption ability of light and high separation rate of photoinduced charge carriers all play an important role in promotion of photocatalytic activity of Pd-doped ZnO nanostructure.

Study on Degradation Mechanism of Carbon Fiber-reinforced Anhydride-cured Resin-based Matrix Composites by a Benzyl Alcohol/NaOH System

Zhong-yu Si,Zhong-xiao Sun,Lianwei Ye,Ai-jun Gao,Yu Wang 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11

In recent years, with the increasing demand for carbon fiber-reinforced polymer (CFRP), the recycling of its wastehas become a serious problem that restricts the wider application of CFRP. This study used a benzyl alcohol/NaOH system atatmospheric pressure to degrade the CFRP of epoxy-resin matrix cured by anhydride, and the influence of NaOH dosage ondegradation rate was investigated. The degradation mechanism of the resin was analyzed using Fourier transform infraredspectroscopy, gas chromatography-mass spectrometry and Electro-Spray Ionization-Mass Spectroscopy. The structure andproperties of the recycled carbon fibers were characterized using scanning electron microscopy, X-ray photoelectronspectroscopy and a monofilament tensile strength test. The experimental results indicated that the benzyloxy nucleophilicgroup produced by benzyl alcohol in alkaline conditions selectively attacked the cross-linking ester bond of the resin andbroke the c ross-linking point. Finally, the resin was degraded by removing the curing agent. When the m ass ratio of NaOH toCFRP (w(NaOH):w(CFRP)) was not under 1:1 and the reaction conditions were 190 °C, 1 h and atmospheric pressure, thedegradation rate of the resin reached 98.4 %. The degradation products of the resin were insoluble in benzyl alcohol andprecipitated, which was conducive to the recovery and reuse of the benzyl alcohol. The surface oxygen content of therecycled carbon fiber was similar to that of the original carbon fiber, and the tensile strength of recycled carbon fibermonofilament remained above 95 % of the original.

In vitro Removal of Deoxynivalenol and T-2 Toxin by Lactic Acid Bacteria

Zhong-Yi Zou,Zhi-Fei He,Hong-Jun Li,Peng-Fei Han,Xiao Meng,Yu Zhang,Fang Zhou,Ke-Pei Ouyang,Xi-Yue Chen,Jun Tang 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.6

Five strains of lactic acid bacteria were tested for their ability to remove deoxynivalenol (DON) and T-2toxin from MRS broth. The ability of Lactobacillus plantarum strain 102 (LP102) was the strongest among 5strains after incubation at 37oC for 72 h. The mode of removal was physical binding, rather than biotransformation. The abilities were not significantly different between when removing single toxin and when removing mixed toxins by viable cells of LP102. DON and T-2 toxin released from LP102 viable cell-toxin complexes were 28.22±1.55 and 35.42±2.02% of total bound toxins respectively after 3times of wash with posphate buffered saline, respectively,those were 4.59±0.86 and 5.59±1.47% after incubation with simulated gastric fluid (SGF) at 37oC for 4 h, and 6.86±0.81 and 9.04±1.13% after incubation with simulated intestinal fluid (SIF) at 37oC for 4 h, respectively.

The Action Research of Game Sense on Elementary School Soccer Team Training

Jun-Feng Zhong,Yuh-Chih Chen 한국스포츠교육학회 2011 한국스포츠교육학회 국제학술대회 자료집 Vol.2011 No.12

Two New Phenolic Glycosides from Hypoxis aurea Lour

Zhong-Quan Cheng,Dan Yang,Yu-Qing Liu,Jiang-Miao Hu,He-Zhong Jiang,Peng-Cheng Wang,Jun Zhou,You-Xing Zhao,Ning Li 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.10

Prediction of Ultimate Bearing Capacity and Structural Optimization of Aluminum Alloy Plate Joints Based on Artificial Neural Network

Chang-jun Zhong,Ruo-qiang Feng,Zhijie Zhang 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.5

An artifi cial neural network model was established to predict the ultimate bearing capacity of aluminum alloy plate joints under compression-bending state. The input parameters of the network are composed of bolt diameter (R), fl ange plate thickness (T) and connecting plate thickness (L). The output parameter is ultimate bearing capacity. In this paper, fi rstly the fi nite element calculation results are compared with the experimental results to verify the accuracy of fi nite element simulation. Then 216 sets of data were obtained using the fi nite element program ABAQUS, which were used for training, verifi cation and testing of the neural network model. In addition, the infl uence of sample size on the prediction accuracy of neural network is analyzed, and a structural optimization method combining fi nite element calculation and neural network prediction is proposed. The results show that the neural network model is accurate and eff ective in predicting ultimate bearing capacity, and the linear regression correlation coeffi cient is 0.98438. The data sample can be reduced to a certain extent to save the time costs and computing resources; It is reasonable and effi cient to use the method of fi nite element parameter analysis and artifi cial neural network prediction to optimize the structure, which broadens the thinking of structure optimization.

Effects of chelated Zn/Cu/Mn on redox status, immune responses and hoof health in lactating Holstein cows

Xue-Jun Zhao,Zhong-Peng Li,Jun-Hong Wang,Xiang-Ming Xing,Zhenyong Wang,Lin Wang,Zhong-Hua Wang 대한수의학회 2015 Journal of Veterinary Science Vol.16 No.4

To evaluate the effects of chelated Zn/Cu/Mn on redox status, immune responses and hoof health in lactating Holstein cows, 48 head in early lactation were divided into healthy or lame groups according to their gait score. Cows were fed the same amount of Zn/Cu/Mn as sulfate salts or in chelated forms for 180 days, and foot-and-mouth disease (FMD) vaccine was injected at day 90. The results showed that lame cows had lower antioxidant function, serum Zn/Mn levels, hair Cu levels, and hoof hardness. Moreover, increased antioxidant status, FMD antibody titers, serum and hair levels of Zn/Cu/Mn, and hoof hardness and decreased milk fat percent and arthritis biomarkers were observed in cows fed chelated Zn/Cu/Mn. In summary, supplementation with chelated Zn/Cu/Mn improved antioxidant status and immune responses, reduced arthritis biomarkers, and increased accumulation of Zn/Cu/Mn in the body and hoof hardness in dairy cows.