The Inhibitory Effect of Ginseng Pectin on L-929 Cell Migration

Yuying Fan,Hairong Cheng,Dan Liu,Xu Zhang,Bo Wang,Lin Sun,Guihua Tai,Yifa Zhou 대한약학회 2010 Archives of Pharmacal Research Vol.33 No.5

We tested the effects of ginseng pectin prepared by enzymatic hydrolysis of ginseng polysaccharides on cell migration. Ginseng pectin impaired the migration of L-929 cells and reduced their migration speed by up to 50% of control in the presence or absence of serum, suggesting it worked on both serum-dependent and serum-independent migration pathways. Ginseng pectin impaired cell migration via decreased cell spreading. These findings represent a significant contribution towards understanding the bioactivities of ginseng polysaccharides and applying them to health food and medicine.

A Fluorescent Recombinase Aided Amplification Assay for Detection of Babesia microti

Lin, Hong,Zhao, Song,Ye, Yuying,Shao, Lei,Jiang, Nizhen,Yang, Kun The Korea Society for Parasitology and Tropical Me 2022 The Korean Journal of Parasitology Vol.60 No.3

Babesia microti is one of the most common causative agents of babesiosis. A sensitive and rapid detection is necessary for screening potentially infected individuals. In this study, B. microti cytochrome c oxidase subunit I (cox1) was selected as the target gene, multiple primers were designed, and optimized by a recombinase-aided amplification (RAA) assay. The optimal primers and probe were labeled with fluorescein. The sensitivity of fluorescent RAA (fRAA) was evaluated using gradient diluents of the cox1 recombinant plasmid and genomic DNA extracted from whole blood of B. microti infected mice. The specificity of fRAA was assessed by other transfusion transmitted parasites. The analytical sensitivity of the fRAA assay was 10 copies of recombinant plasmid per reaction and 10 fg/µl B. microti genomic DNA. No cross-reaction with any other blood-transmitted parasites was observed. Our results demonstrated that the fRAA assay would be rapid, sensitive, and specific for the detection of B. microti.

SYNTHESIS AND ELECTROCHEMICAL PROPERTIES OF GRAPHENE/MnO2/CONDUCTING POLYMER TERNARY COMPOSITE FOR SUPERCAPACITORS

JINXIAN LIN,YUYING ZHENG,QIFENG DU,MINGPING HE,ZHONGWEN DENG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.1

Graphene(RGO)/MnO2/[N-butyl-3,6-carbazolevinylene-alt-(2,5-dioctyloxy)-p-phenylenevinylene] (PPH–CAR) ternary nanocomposite is fabricated by a simple two-step method, which includes electrochemical reduction of graphene oxide (GO) and oxidation of Mn(CH3COO)2 simultaneously and an ultrathin PPH–CAR layer coated on the RGO/MnO2 surface. The structure of the composite is investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and field-emission scanning electron microscopy (FESEM). The results suggest that the composite is correctly synthesized and each component has good dispersion. Cycle voltammetry (CV), charge and discharge measurements and cycle stability test are used to evaluate its electrochemical performance. Because of the synergistic effect of each component, the composite exhibits excellent electrochemical properties with specific capacitance of 175 F/g, which is a 46% increase compared with RGO/MnO2. Moreover, it reveals outstanding cycling performance with more than 90% capacitance retention over 1000 cycles. Such ternary composite is a candidate for high performance supercapacitors with great promise.

PREPARATION AND CHARACTERIZATION OF A POLY(PYRROLYL METHANE)/MULTIWALLED CARBON NANOTUBES COMPOSITES

JINXIAN LIN,PAN WANG,YUYING ZHENG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.6

A poly(pyrrolyl methane) (Poly[pyrrole-2, 5-diyl(4-methoxybenzylidane)], PPDMOBA)/multiwalled carbon nanotubes (MWNTs) composites are fabricated by in situ chemical polycondensation of pyrrole and 4-methoxybenzaldehyde on MWNTs. The structure, morphology, thermal stability and electrical property of the resulting composites are investigated via fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and a four-probe method. The electrochemical performance of the composites is determined in a three-electrode system using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. FTIR, FESEM and TEM confirm that the composites have been successfully prepared, and PPDMOBA is uniformly dispersed in MWNTs. Electrical conductivity of PPDMOBA/MWNTs composites is 1.39 S cm-1, which is significantly larger than that of pristine PPDMOBA. The specific capacitance and charge transfer resistance of the composites is 56 F g-1 (1 mA cm-2) and 0.3Ω, respectively.

Host performance of Trichogramma species on Opisina arenosella, and evaluation of their biological control efficacy

Tao Jin,Yuying Lin,Shichou Han,Guangchang Ma,Haibo Wen,Zhengqiang Peng 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.3

Five candidate species for biocontrol of Opisina arenosella Walker, a destructive pest of palm trees, were evaluated. To compare host performance, 5 Trichogramma species were allowed to parasitize O. arenosella eggs of different ages and egg densities. The parasitization capacity of two species, T. embryophagum and T. japonicum, were evaluated with respect to adult age. Treatments consisted of field with releases of T. embryophagum or T. japonicum set up in Danzhou, Hainan, and the pest densities was recorded periodically. The results showed that T. embryophagum, T. chilonis, and T. dendrolimi had a strong parasitic ability on 0-day-old O. arenosella eggs. In species comparisons, the parasitism rates of T. embryophagum on 1-day-old and 4-day-old eggs, and T. japonicum on 2-day-old, 3-day-old, and 5-day-old eggs of O. arenosella were significantly higher than those of other Trichogramma species. At densities of 40 and 35 eggs/tube (84.8 cm 3 ), the numbers of eggs parasitized by T. embryophagum and T. japonicum were the highest, at 29.9 and 24.6, respectively. During the first 24-h, the numbers of eggs parasitized by T. embryophagum and T. japonicum were 110.6 and 82.2, accounting for 84.7% and 59.5%, respectively, of the total parasitized eggs. After 2 months releases, the larvae and pupa density of O. arenosella under T. embryophagum and T. japonicun treatment were 0.95 and 0.94 individuals/leaflet, respectively, were significantly lower than untreated control (1.6 individuals/leaflet). These findings encouraged that T. embryophagum and T. japonicun are able to be used for biological control for O. arenosella.

A Reliability Model of Wind Farm Considering the Complex Terrain and Cable Failure Based on Clustering Algorithm

Wenxia Liu,Qi Chen,Yuying Zhang,Guobing Qiu,Chenghui Lin 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

A reliability model of wind farm located in mountainous land with complex terrain, which considers the cable and wind turbine (WT) failures, is proposed in this paper. Simple wake effect has been developed to be applied to the wind farm in mountainous land. The component failures in the wind farm like the cable and WT failures which contribute to the wind farm power output (WFPO) and reliability is investigated. Combing the wind speed distribution and the characteristic of wind turbine power output (WTPO), Monte Carlo simulation (MCS) is used to obtain the WFPO. Based on clustering algorithm the multi-state model of a wind farm is proposed. The accuracy of the model is analyzed and then applied to IEEE-RTS 79 for adequacy assessment.

A Reliability Model of Wind Farm Considering the Complex Terrain and Cable Failure Based on Clustering Algorithm

Liu, Wenxia,Chen, Qi,Zhang, Yuying,Qiu, Guobing,Lin, Chenghui The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

A reliability model of wind farm located in mountainous land with complex terrain, which considers the cable and wind turbine (WT) failures, is proposed in this paper. Simple wake effect has been developed to be applied to the wind farm in mountainous land. The component failures in the wind farm like the cable and WT failures which contribute to the wind farm power output (WFPO) and reliability is investigated. Combing the wind speed distribution and the characteristic of wind turbine power output (WTPO), Monte Carlo simulation (MCS) is used to obtain the WFPO. Based on clustering algorithm the multi-state model of a wind farm is proposed. The accuracy of the model is analyzed and then applied to IEEE-RTS 79 for adequacy assessment.