Manufacture and antibacterial characteristics of Eucommia ulmoides leaves vinegar

Chun-Feng Jia,Wang-Ning Yu,Bo-Lin Zhang 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.5

In this work, the fermentation conditions and theantibacterial characteristics of Eucommia ulmoides leavesvinegar (EV) were studied. By single factor orthogonaltest, it was found that under optimal fermentation conditions(bran addition 10%, sugar addition 8%, leaven addition0.3% and acetic acid bacteria solution 12%), the aceticacid content and CA content of EV were 45.5 ± 2.8 mg/mL and 0.98 ± 0.08 mg/mL, respectively. Then, by thedisc diffusion method, it was concluded that the antibacterialeffect of EV was significantly higher than that ofEucommia ulmoides leaves enzymatic hydrolysate andZhenjiang aromatic vinegar (P\0.05). An investigationinto action mode of EV against Bacillus subtilis indicatedthat, under the combined action of CA and acetic acid, EVexerted its antibacterial effect by damaging bacterial cellwall and cell membrane, increasing the cell permeabilitywhich resulted in the structural lesions and release of cellcomponents, thus led to cell death.

Study of Delay-Independent Decentralized Guaranteed Cost Control for Large Scale Systems

Chun-Xia Dou,Zhi-Sheng Duan,Xing-Bei Jia,Pei-Feng Niu 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.3

This study introduces delay independent decentralized guaranteed cost control design method based on two controller structures for nonlinear uncertain interconnected large scale systems with time delays. First, a set of equivalent Takagi-Sugeno (T-S) fuzzy models are extended to represent the systems. Then a decentralized state-feedback guaranteed cost performance controller is proposed for the fuzzy systems. Based on delay independent Lyapunov functional approach, some sufficient conditions for the existence of the controller can be cast into the feasible problem of LMIs irrespective of the sizes of the time delays so that the system can be asymptotically stabilized for all considered uncertainties whose sizes are not larger than their bounds. Finally, the minimizing approach is proposed to search the suboptimal upper bound value of guaranteed cost function. Moreover, the corresponding conditions are extended into the generalized dynamic output-feedback close-loop system. Finally, the better control performances of the proposed methods are shown by the simulation examples.

Multi-walled Carbon Nanotubes/Polypropylene-based Coating Layer on the Composite Metal Filaments: Characteristic Evaluations and Radiation-shielded Fabric

Mei-Feng Lai,Chen-Hung Huang,Ching-Wen Lou,Yu-Chun Chuang,Cyun-Yu Wei,Jia-Horng Lin 한국섬유공학회 2022 Fibers and polymers Vol.23 No.3

In this study, polypropylene (PP) and multi-walled carbon nanotubes (MWCNTs) are used to coat stainless steel(SS) wrapped yarns, the product of which is then fabricated into conductive textiles. Afterwards, the tensile properties,surface resistivity, and electromagnetic shielding effectiveness (EMSE) of conductive textiles are evaluated, therebydetermining the influences of the MWCNTs content. The test results show that using MWCNT can effectively improve themechanical properties of the coated yarns and conductive woven fabrics. In addition, 5 wt % of MWCNT provides the wovenfabrics with a lower surface resistivity and higher EMSE. The influences of the lamination angle and number of laminationlayers on EMSE are investigated, and the maximum EMSE of -49.89 dB occurs when the lamination angle is 0 °/90 °/0 °.

Polypropylene/Carbon Fiber Composite Layered Materials: Electromagnetic Interference Shielding Effect and Mechanical Performance

Mei-Feng Lai,Chen-Hung Huang,Jia-Horng Lin,Yu-Chun Chuang,Ching-Hua Wang,Ching-Wen Lou 한국섬유공학회 2021 Fibers and polymers Vol.22 No.9

In this study, conductive polymer composites and conductive functional fabrics are combined to serve aselectromagnetic shielding planks. Polypropylene (PP), carbon black (CB), and short carbon fibers (SCF) are blended atdifferent ratios to form conductive polymer composites (i.e. PCS series). The mechanical property, electrical property,morphology, and electromagnetic interference shielding effectiveness (EMI SE) of the PCS series are evaluated. The testresults show that with 20 wt% of conductive fillers (i.e. CB and SCF), PCS20 exhibits the optimal tensile strength, flexuralstrength, and electrical property that is 7 order of magnitude higher than that of pure PP plates. Moreover, the EMI SE of thisgroup also reaches -30 dB, which meets level one of civil EMI SE standard. Therefore, PCS20 is used to combine with fourconductive sandwiches. The resulting multilayered functional PCS-sandwich planks are tested in terms of mechanicalproperty, morphology, and EMI SE. The test results show that the planks composed of a pure conductive woven sandwichhave the maximum tensile property and significantly improved impact resistance. All of the multilayered functional plankshave EMI SE that is higher than -50 dB and are qualified for the protection level of standard EMI SE electronic devices.

Research Articles : Modeling Knot Properties for Mongolian Pine in Northeast China

( Wei Wei Jia ),( Feng Ri Li ),( Li Chun Jiang ) 한국임학회 2008 한국산림과학회지 Vol.97 No.5

Low Counts of γδ T Cells in Peritumoral Liver Tissue are Related to More Frequent Recurrence in Patients with Hepatocellular Carcinoma after Curative Resection

Cai, Xiao-Yan,Wang, Jia-Xing,Yi, Yong,He, Hong-Wei,Ni, Xiao-Chun,Zhou, Jian,Cheng, Yun-Feng,Jin, Jian-Jun,Fan, Jia,Qiu, Shuang-Jian Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.2

Objectives: TCR-gamma-delta+T cells (${\gamma}{\delta}$ T cells) are non-conventional T lymphocytes that can recognize and eradicate tumor cells. Our previous studies showed that infiltration and function of ${\gamma}{\delta}$ T cells were substantially attenuated in hepatocellular carcinoma (HCC). However, their prognostic value was not clarified. Methods: The association between ${\gamma}{\delta}$ T cells and the clinical outcomes was determined by immunohistochemistry (IHC) in a HCC patient cohort (n = 342). Results:Immunohistochemistry showed decreased infiltration of ${\gamma}{\delta}$ T cells in tumoral tissues compared with paired peritumoral tissues. The counts of ${\gamma}{\delta}$ T cells in peritumoral tissues were negatively correlated with tumor size (P = 0.005). Survival analysis showed that the levels of peritumoral ${\gamma}{\delta}$T cells were related to both time to recurrence (TTR) and overall survival (OS) (P = 0.010 and P = 0.036, respectively) in univariate analysis, and related to TTR in multivariate analysis (P = 0.014, H.R. [95% CI] = 0.682 [0.502-0.927]). Furthermore, the level of peritumoral ${\gamma}{\delta}$ T cells showed independent prognostic value for TTR in Barcelona Clinic Liver Cancer (BCLC) stage A patients (P = 0.038, H.R. [95% CI] = 0.727 [0.537-0.984]). However, tumoral ${\gamma}{\delta}$ T cells did not show independent prognostic value for either TTR or OS in HCC patients. Conclusions: Low counts of ${\gamma}{\delta}$ T cells in peritumoral liver tissue are related to a higher incidence of recurrence in HCC and can predict postoperative recurrence, especially in those with early-stage HCC.

Experimental and Numerical Research on Process Formability in Magnetic Pulse Forming of AZ31 Magnesium Alloy Sheets

Jun-Rui Xu,Jun-Jia Cui,Guangyong Sun,Yan-Rong Li,Chun-Feng Li 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.

The plain strain of AZ31 magnesium alloy sheet in magnetic pulse forming was investigated by numerical simulation and experimental method. Combination of uniform pressure coil and Holmberg's specimen was employed to evaluate the plain strain of AZ31 sheet. The numerical simulation for magnetic pulse plain strain of AZ31 sheet is performed by means of ANSYS FEA software. The magnetic flux density of uniform pressure coil was distributed uniformly, especially at the center of gauged area of AZ31 sheet directly in relation to the deformation behavior of AZ31 sheet. The velocity of typical point increases as increasing energy, and the more position closes to the center of sheet the higher velocity achieves. The forming height is increased with increasing discharge voltage. Compared with C=768 μF and C=1536 μF, the capacitance of 1152 μF is more effective for forming, which is confirmed by experiments. The peak velocity at the center of sheet is about 105 m/s. The major strains of magnetic pulse plane strain lie approximately in the strain ranges of 5.83-6.45%. However, the 3.22-3.82% (major strain) are the limit strains in quasi-static condition. The experimental results indicate that the major strain of AZ31 sheet improves about 75% compared with the quasi-static case.