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Wang, Tongjiang,Ofman, Leon,Sun, Xudong,Solanki, Sami K.,Davila, Joseph M. American Astronomical Society 2018 The Astrophysical journal Vol.860 No.2
<P>Standing slow-mode waves have been recently observed in flaring loops by the Atmospheric Imaging Assembly of the Solar Dynamics Observatory. By means of the coronal seismology technique, transport coefficients in hot (similar to 10 MK) plasma were determined by Wang et al., revealing that thermal conductivity is nearly suppressed and compressive viscosity is enhanced by more than an order of magnitude. In this study, we use 1D nonlinear MHD simulations to validate the predicted results from the linear theory and investigate the standing slow-mode wave excitation mechanism. We first explore the wave trigger based on the magnetic field extrapolation and flare emission features. Using a flow pulse driven at one footpoint, we simulate the wave excitation in two types of loop models: Model 1 with the classical transport coefficients and Model 2 with the seismology-determined transport coefficients. We find that Model 2 can form the standing wave pattern (within about one period) from initial propagating disturbances much faster than Model 1, in better agreement with the observations. Simulations of the harmonic waves and the Fourier decomposition analysis show that the scaling law between damping time (tau) and wave period (P) follows tau proportional to P-2 in Model 2, while tau proportional to P in Model 1. This indicates that the largely enhanced viscosity efficiently increases the dissipation of higher harmonic components, favoring the quick formation of the fundamental standing mode. Our study suggests that observational constraints on the transport coefficients are important in understanding both the wave excitation and damping mechanisms.</P>
Ying-Wang,Yi-guo Chen,Wan-shuang Zhao,Di Li,Ya-han Xu,Meng-di Li,Jin Chen,Zhi-jun Kou,Qi-ge Wang,Nsoa dimitri Joseph 사단법인약침학회 2018 Journal of Acupuncture & Meridian Studies Vol.11 No.3
This study aims to investigate the possible mechanisms of electroacupuncture (EA) at PC6to improve myocardial ischemia (MI) by regulating the cardiac transient outward potassiumcurrent channel (Ito). According to the random number table, the mice were dividedinto six groups of six mice each: control group, MI group, PC6, LU7 (Lieque-point), ST36(Zusanli-point), and nonacupoint group. Mice in the control group were injected with saline(20 mg/kg, 24 hours interval), and the other ASIC3 / mice were injected subcutaneouslytwice with isoproterenol (ISO) (20 mg/kg, 24 hours interval). In thepreexperiment, 5 mg/kg, 10 mg/kg, 20 mg/kg, and 30 mg/kg of ISO were used, andthe results showed that 5 mg/kg and 10 mg/kg of ISO both could induce acute MI, butshorter duration of sustained MI. On the other hand, an injection of 30 mg/kg can makethe mice experience arrhythmia or die immediately, and EA was operated at PC6, LU7,ST36 acupoints, and nonacupoint in the mice of PC6, LU7, ST36, and nonacupoint groups,respectively, after injecting twice. Then Western blotting techniques (Western Blot) wereused to analyze the protein expressions of Kv1.4, Kv4.2, Kv4.3, and KchIP2. The results ofthis experiment showed that the protein expressions of Kv1.4, Kv4.2, Kv4.3, and KChIP2 inMI group were significantly lower than those in the control group (p < 0.01). Comparedwith MI group, the results of PC6, LU7, and ST36 groups obviously increased (p < 0.05). Furthermore, the expressions of PC6 group were higher than LU7 group and ST36 group(p < 0.05). And electrocardiogram’s T-waves showed obvious pathological changes inthe MI group compared to the control group (p < 0.01). After EA, the abnormal T-waves voltage of ECG in PC6, LU7, and ST36 groups was improved (p < 0.05). In addition, therate change of PC6 group was larger than that of both LU7 and ST36 groups (p < 0.05). But the T-waves voltage of the nonacupoint group was not significantly different than thatof the MI group (p > 0.05).
Yihui Wang,Joseph P. Hoffmann,Chau-Wen Chou,Kerstin Höner zu Bentrup,Joseph A. Fuselier,Jacob P. Bitoun,William C. Wimley,Lisa A. Morici 한국미생물학회 2020 The journal of microbiology Vol.58 No.7
Gram-negative bacteria secrete outer membrane vesicles (OMVs) that play critical roles in intraspecies, interspecies, and bacteria-environment interactions. Some OMVs, such as those produced by Pseudomonas aeruginosa, have previously been shown to possess antimicrobial activity against competitor species. In the current study, we demonstrate that OMVs from Burkholderia thailandensis inhibit the growth of drug-sensitive and drug-resistant bacteria and fungi. We show that a number of antimicrobial compounds, including peptidoglycan hydrolases, 4-hydroxy-3-methyl-2-(2-nonenyl)- quinoline (HMNQ) and long-chain rhamnolipid are present in or tightly associate with B. thailandensis OMVs. Furthermore, we demonstrate that HMNQ and rhamnolipid possess antimicrobial and antibiofilm properties against methicillin- resistant Staphylococcus aureus (MRSA). These findings indicate that B. thailandensis secretes antimicrobial OMVs that may impart a survival advantage by eliminating competition. In addition, bacterial OMVs may represent an untapped resource of novel therapeutics effective against biofilm- forming and multidrug-resistant organisms.
Hong Kong Chinese Women's Lay Beliefs about Cervical Cancer Causation and Prevention
Wang, Linda Dong-Ling,Lam, Wendy Wing Tak,Wu, Joseph,Fielding, Richard Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.18
Background: This study aimed to seek insights into Chinese women's lay beliefs about cervical cancer causal attributions and prevention. Materials and Methods: Twenty-three new immigrant adult women from Mainland China and thirty-five Hong Kong adult women underwent semi-structured in-depth interviews. Interviews were audio taped, transcribed and analyzed using a Grounded Theory approach. Results: This study generated three foci: causal beliefs about cervical cancer, perceived risk of cervical cancer, and beliefs about cervical cancer prevention. Personal risky practices, contaminated food and environment pollution were perceived as the primary causes of cervical cancer. New immigrant women more likely attributed cervical cancer to external factors. Most participants perceived cervical cancer as an important common fatal female cancer with increased risk/prevalence. Many participants, particularly new immigrant women participants, expressed helplessness about cervical cancer prevention due to lack of knowledge of prevention, it being perceived as beyond individual control. Many new immigrant participants had never undergone regular cervical screening while almost all Hong Kong participants had done so. Conclusions: Some Chinese women hold pessimistic beliefs about cervical cancer prevention with inadequate knowledge about risk factors. Future cervical cancer prevention programs should provide more information and include capacity building to increase Chinese women's knowledge and self-efficacy towards cervical cancer prevention.
( Joseph D. Alba ),( Peiming Wang ),( Woon Yee Ho ) 세종대학교 경제통합연구소 2007 Journal of Economic Integration Vol.22 No.2
We use data on 317 Japanese firms to examine the effect of relative access to credit and relative wealth on the Japanese firm`s rate of foreign direct investment (FDI) in the United States. Using the zero-inflated negative binomial model, we find that multiple rating downgrades of a firm`s main bank significantly affected the Japanese firm`s rate of FDI in the United States. This result holds for firms with the highest 20% of bonds-to-liabilities ratio indicating that banking problems in Japan affected even firms who could have financed their FDI with bonds. We also find that the firm`s rate of FDI is affected by the firm`s relative wealth.
Xavier Benadict Joseph,Megha Maria Stanley,Sea-Fue Wang,Mary George 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
The potential impact of antibiotics in water environments affects aquatic organisms, microbial communitystructure, and resistance genes. In this work, we report the hydrothermal synthesis of twodimensional(2D) tungsten carbide (WC) nanoparticles on CO32- anion intercalated three-dimensional(3D) self-assembled nickel–cobalt layered double hydroxide (NiCo-LDH) nanorods, for the electrochemicaldetermination of norfloxacin (NRF). The synergistic impact between the dual active components ofthe prepared electrode offered increased active surface area, high electrical conductivity, and promptmass and ion diffusion, resulting in improved electrochemical performance for NRF monitoring. In idealconditions, WC@NiCo-LDH modified electrode exhibited enhanced electrochemical characteristics, widelinear response (DPV = 0.02–83.4 lM and in i-t = 0.002–346 lM), and lowdetection limit (LOD) (DPV = 0. 005 lM and i-t = 0.002 lM). Furthermore, good reproducibility, virtuous operational and cycle stabilities,were obtained. The practical applications in real-world samples with acceptable recovery ranges wereverified the interference-free sensing of NRF.