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您的检索式：作者名="Zhenxiang Hong"
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| 1 | Magneto-acoustic oscillations observed in a solar plage region显示文摘We gave an extensive study for the quasi-periodic perturbations on the time profiles of the line of sight(LOS) magnetic field in 10 × 10 sub-areas in a solar plage region(corresponds to a facula on the photosphere).The perturbations are found to be associated with the enhancement of He I 10830 A absorption in a moss region,which is connected to loops with million-degree plasma.FFT analysis to the perturbations gives a kind of spectrum similar to that of Doppler velocity:a number of discrete periods around 5 minutes.The amplitudes of the magnetic perturbations are found to be proportional to magnetic field strength over these sub-areas.In addition,magnetic perturbations lag behind a quarter of the cycle in the phase with respect to the p-mode Doppler velocity.We show that the relationships can be well explained with an MHD solution for the magneto-acoustic oscillations in high-β plasma.Observational analysis also shows that,for the two regions with the stronger and weaker magnetic field,the perturbations are always anti-phased.All findings show that the magnetic perturbations are actually magneto-acoustic oscillations on the solar surface,the photosphere,powered by p-mode oscillations.The findings may provide a new diagnostic tool for exploring the relationship between magneto-acoustic oscillations and the heating of the solar upper atmosphere,as well as their role in helioseismology. | Haisheng Ji Parida Hashim Zhenxiang Hong Zhe Xu Jinhua Shen Kaifan Ji Wenda Cao | 2021 | Research in Astronomy and Astrophysics2021，21，7： | 0 |
| 2 | Porcine epidemic diarrhea virus nsp14 inhibits NF-κB pathway activation by targeting the IKK complex and p65显示文摘Coronaviruses(CoVs)are a group of related enveloped RNA viruses that have severe consequences in a wide variety of animals by causing respiratory,enteric or systemic diseases.Porcine epidemic diarrhea virus(PEDV)is an economically important CoV distributed worldwide that causes diarrhea in pigs.nsp14 is a nonstructural protein of PEDV that is involved in regulation of innate immunity and viral replication.However,the function and mechanism by which nsp14 modulates and manipulates host immune responses remain largely unknown.Here,we report that PEDV nsp14 is an NF-κB pathway antagonist.Overexpression PEDV nsp14 protein remarkably decreases SeV-,poly(I:C)-and TNF-α-induced NF-κB activation.Meanwhile,expression of proinflammatory cytokines is suppressed by nspl4.nsp14 inhibits the phosphorylation of IKKs by interacting with IKKs and p65.Furthermore,nsp14 suppresses TNF-α-induced phosphorylation and nuclear import of p65.Overexpression nsp14 considerably increases PEDV replication.These results suggest a novel mechanism employed by PEDV to suppress the host antiviral response,providing insights that can guide the development of antivirals against CoVs. | Shasha Li Fan Yang Caina Ma Weijun Cao Jinping Yang Zhenxiang Zhao Hong Tian Zixiang Zhu Haixue Zheng | 2021 | Animal Diseases2021，1，3： | 0 |
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