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Yehui Wu,Jing Li,Mengfan Qiao,Dan Meng,Qingling Meng,Jun Qiao,Xingxing Zhang,Lixia Wang,Kuojun Cai,Jinsheng Zhang,Zaichao Zhang,Weiwei Yu,Xuepeng Cai 대한수의학회 2019 Journal of Veterinary Science Vol.20 No.6
As an important zoonotic pathogen, Staphylococcus aureus (S. aureus) infection has led to serious mastitis and endometritis in infected dairy cows. HereIn this study, a total of 164 strains of S. aureus were isolated from dairy cows in Xinjiang Province, China, and subjected to assays to determine of drug susceptibility and biofilm (BF) formation ability. The eEnterotoxin-related genes were detected, and then the transcription levels of genes related to BF formation were also determined by using reverse transcription-quantitative polymerase chain reactionPCR. Moreover, the pathogenicity of these isolates with different BF formation abilities was determined via by measuring their hemolysis activity, half lethal dose (LD50) and organ bacterial load, respectively. The results showed that 83.4 % of S. aureus isolates could form BF. Among them, 40.8 % of the strains had weak BF formation ability, and most strains with a strong BF formation ability were ica gene carriers. The S. aureus isolates displayed multidrug resistance and their drug resistance was positively correlated with their BF formation ability. Moreover, 96.3 % of the S. aureus isolates carried enterotoxin genes. Among them, the detection rates of the novel enterotoxin genes were higher than thoseat of conventional enterotoxin genes. Furthermore, the isolates with a strong BF formation ability had higher LD50 but lower hemolysis ability and organ bacterial load than thoseat of the isolates with weak or no BF ability. However, those isolates without BF ability caused produced more severe pathological changes than thoseat of the isolates with strong BF formation ability. These findings suggested that higher frequencies of BF ability and presence of novel enterotoxin genes were are important characteristics of S. aureus isolates from dairy cows in Xinjiang Province, China, and such isolateswhich may posed potential threats to food safety.
Jinsheng Zhou,Yanming Lin,Lin Ye,Ling Wang,Li Zhou,Huiyuan Hu,Qilong Zhang,Hui Yang,Zhongkuan Luo 한국고분자학회 2019 Macromolecular Research Vol.27 No.11
To solve the biofouling problem of polyvinyl alcohol (PVA) hydrogel as the artificial cornea, glycidyl methacrylate (GMA) and 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) were grafted on the surface of PVA hydrogel via a new method of photoinduced electron transfer–reversible addition fragmentation chain transfer (PET-RAFT) polymerization and ring-open reaction. Both attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscope (SEM), and thermogravimetric analysis (TGA) confirmed that GMA and HACC were successfully grafted on the surface of PVA hydrogel. A series of experiments to test the hydrophilicity of PVA hydrogel showed that it became hydrophobic due to the introduction of hydrophobic groups after grafting with GMA and HACC. In addition, cytotoxicity in vitro of PVA-g-p(GMA-HACC) hydrogel could be considered as not cytotoxicity according to ISO 10993-5: 2009. The anti-fouling property of hydrogel decreased after grafting with GMA due to the hydrophobic surface, while increased after grafting with HACC due to the steric repulsion of p(GMA-HACC) polymer brush. It’s no doubt that PET-RAFT was a feasible and reliable surface modification method which could be used in many biomolecules due to the excellent advantages.
Yan Zhang,Lingqian Kong,Xuezhong Liu,Chunlei Wang,Jinsheng Zhao 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.8
Two monomers including 4,4′,4″-tris(3-methoxythiophene-2-yl)triphenylamine (M1) and 4,4′,4″-tris(3,4-dimethoxythiophene-2-yl)triphenylamine (M2) with triphenylamine as their core were synthesized and the corresponding polymers were obtained by electrochemical polymerization. Their electrochemical properties were investigated using scanning electron microscopy, UV–Vis, and cyclic voltammetry. It was found that the two polymers had reversible redox behavior with the different color change under the applied potentials. Both the polymers displayed high switching efficiency and optical contrast. Moreover, the corresponding electrochromic devices (ECDs) employing the synthesized polymers and poly(3,4-ethylenedioxythiophene) were constructed. The spectroelectrochemical experiments illustrated that the ECDs exhibited fast response time, reasonable optical contrast, favorable optical memories, and redox stability.
Light-weight Preservation of Access Pattern Privacy in Un-trusted Storage
Yang, Ka,Zhang, Jinsheng,Zhang, Wensheng,Qiao, Daji The Institute of Electronics and Information Engin 2013 IEIE Transactions on Smart Processing & Computing Vol.2 No.5
With the emergence of cloud computing, more and more sensitive user data are outsourced to remote storage servers. The privacy of users' access pattern to the data should be protected to prevent un-trusted storage servers from inferring users' private information or launching stealthy attacks. Meanwhile, the privacy protection schemes should be efficient as cloud users often use thin client devices to access the data. In this paper, we propose a lightweight scheme to protect the privacy of data access pattern. Comparing with existing state-of-the-art solutions, our scheme incurs less communication and computational overhead, requires significantly less storage space at the user side, while consuming similar storage space at the server. Rigorous proofs and extensive evaluations have been conducted to show that the proposed scheme can hide the data access pattern effectively in the long run after a reasonable number of accesses have been made.
A Scalable PKI Based on P2P Network
Zhiwei Gao,Jinsheng Fan,Yufeng Jia,Li Zhang 보안공학연구지원센터 2007 International Journal of Security and Its Applicat Vol.1 No.2
Public key infrastructure (PKI) is a powerful tool for protecting information. Currently a PKI system shows a trend toward an emerging global PKI which becomes more complicated. The global PKI has to handle an enormous number of queries for cryptographic certificates which attest the authenticity of public keys. So a decentralized organization of the PKI is advantageously. Therefore we developed a specialized Peer-to-Peer-PKI model realizing efficient search and transfer of certificates and trust-recommendations. Our model based on our own rigorous binary tree algorithm and has four advantages. First, there is no any bottleneck problem when establishing a certification path or authenticating. Second, the authentication path is short with two constant logic steps. Third, in our model the entities need to mutual authenticate don’t need to inquire or download the CRL. Fourth, it’s easy to extend and suitable for large-scale network.
Zhaojing Gao,Heng Zhang,Min Ji,Chenlong Zuo,Jinsheng Zhang 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.11 No.2
In recent years the global manufacturing industry has put forward the requirements of sustainable production, as well as a higher demand for product quality and productivity. The ever-increasing environmental requirements require cleaner and more environmentally friendly machining techniques to replace traditional immersion lubrication. Inconel 718 alloy has a wide range of applications in aerospace, chemical and power generation, but the difficult-to-cut nature of this alloy poses a great deal of difficulty in its machining. In this paper, supercritical carbon dioxide (scCO2) based cooling lubrication was used to mill Inconel 718 alloy. The scCO2 technology was combined with the minimal quantity lubrication (MQL) technology and the oil-on-water technology (OoW) technology to quantify the effect of different cooling lubrication by analyzing the milling force, milling temperature, surface roughness and tool wear. The experimental results showed that the use of scCO2-based cooling and lubrication conditions significantly reduced the milling forces and milling temperatures and resulted in better machined surface quality. Lower surface roughness values were obtained with scCO2 + OoW cooling compared to dry milling, only scCO2 cooling and scCO2 + MQL cooling.
Robust Consensus for Networked Mechanical Systems with Coupling Time Delay
Haibo Min,Shicheng Wang,Fuchun Sun,Jinsheng Zhang 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.2
This paper studies the state consensus for a class of networked nonlinear mechanical systems with coupling time delay. In particular, robust consensus protocols for both deterministic and uncertain systems with time delay are investigated. For deterministic systems, we develop a P-like protocol which allows for variable coupling time delay. We show that it is sufficient to have only the relative position information together with a damping control term, whereas the relative velocity information is not needed for state consensus. Then, an adaptive robust control protocol is proposed for uncertain sys-tems with unknown parameters in the system dynamics and arbitrary constant coupling time delays. By introducing the passivity-based framework, we demonstrate that state consensus is still reachable in this case. Finally, a numerical example is included to illustrate the obtained results.
Chi He,Zhengping Hao,Xinyan Zhang,Shaokai Gao,Jinsheng Chen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.5
Mesoporous silica supported catalysts with highly dispersed Pd particles located in their pore channels were synthesized via a novel and simple two-solvents approach. It is found that the support morphology has significant effect on active phase dispersion. Both the pore diameter and pore length of the silica hosts are critical for the catalytic performances of prepared catalysts. Catalyst with plateletlike morphology (Pd/S-P) shows the highest catalytic activity with 90% toluene conversion at 192 8C. The catalytic performances of the synthesized catalysts are closely correlated with Pd dispersion, CO2desorption capability, pore diameter and pore length of the host materials.
Xuesong Shang,Gongren Hu,Chi He,Jinping Zhao,Fuwang Zhang,Ya Xu,Yunfeng Zhang,Jianrong Li,Jinsheng Chen 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.1
An effective and applicable method for the regeneration of used commercial full-scale honeycomb monolith catalysts in China (V2O5–WO3/TiO2) is firstly reported. The de-ionized water and dilute sulfuric acid solution with a relatively low concentration (pH = 2) are potent reagent to regenerated the catalysts used for about 30,000 h in coal-fired power plant. All samples were systematically characterized by TEM,N2 adsorption/desorption, EDX, FT-IR and XPS techniques. The evaluation results reveal that the activity of the used catalysts can be obviously improved after regeneration processes. Moreover, the regenerated catalysts possess superior activity under different gas hourly space velocity (GHSV), and SO2 oxidation rate is lower than 1% in all cases. The regeneration method can remove the deposits, restore active sites and prevent nanoparticles aggregation as well as active phases leaching. Overall, these processes have promised as effective approaches for industrial V2O5–WO3/TiO2 catalysts regeneration.