TY  - JOUR
A1  - Cheng, Xin
A1  - Kliem, Bernhard
A1  - Ding, Mingde
T1  - Unambiguous evidence of filament splitting-induced partial eruptions
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - Coronal mass ejections are often considered to result from the full eruption of a magnetic flux rope (MFR). However, it is recognized that, in some events, the MFR may release only part of its flux, with the details of the implied splitting not completely established due to limitations in observations. Here, we investigate two partial eruption events including a confined and a successful one. Both partial eruptions are a consequence of the vertical splitting of a filament-hosting MFR involving internal reconnection. A loss of equilibrium in the rising part of the magnetic flux is suggested by the impulsive onset of both events and by the delayed onset of reconnection in the confined event. The remaining part of the flux might be line-tied to the photosphere in a bald patch (BP) separatrix surface, and we confirm the existence of extended BP sections for the successful eruption. The internal reconnection is signified by brightenings in the body of one filament and between the rising and remaining parts of both filaments. It evolves quickly into the standard current sheet reconnection in the wake of the eruption. As a result, regardless of being confined or successful, both eruptions produce hard X-ray sources and flare loops below the erupting but above the surviving flux, as well as a pair of flare ribbons enclosing the latter.
KW  - Sun: magnetic fields
KW  - Sun: corona
KW  - Sun: coronal mass ejections (CMEs)
KW  - Sun: flares
Y1  - 2018
U6  - https://doi.org/10.3847/1538-4357/aab08d
SN  - 0004-637X
SN  - 1538-4357
VL  - 856
IS  - 1
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Wang, Guang
A1  - Li, Pei-zhi
A1  - Zhang, Shi-yao
A1  - Zhong, Shan
A1  - Chu, Chang
A1  - Zeng, Shufei
A1  - Yan, Yu
A1  - Cheng, Xin
A1  - Chuai, Manli
A1  - Hocher, Berthold
A1  - Yang, Xuesong
T1  - Lipopolysaccharides (LPS) Induced Angiogenesis During Chicken Embryogenesis is Abolished by Combined ETA/ETB Receptor Blockade
JF  - Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry and pharmacology
N2  - Background/Aims: Angiogenesis plays a key role during embryonic development. The vascular endothelin (ET) system is involved in the regulation of angiogenesis. Lipopolysaccharides (LPS) could induce angiogenesis. The effects of ET blockers on baseline and LPS-stimulated angiogenesis during embryonic development remain unknown so far. Methods: The blood vessel density (BVD) of chorioallantoic membranes (CAMs), which were treated with saline (control), LPS, and/or BQ123 and the ETB blocker BQ788, were quantified and analyzed using an IPP 6.0 image analysis program. Moreover, the expressions of ET-1, ET-2, ET3, ET receptor A (ETRA), ET receptor B (ETRB) and VEGFR2 mRNA during embryogenesis were analyzed by semi-quantitative RT-PCR. Results: All components of the ET system are detectable during chicken embryogenesis. LPS increased angiogenesis substantially. This process was completely blocked by the treatment of a combination of the ETA receptor blockers-BQ123 and the ETB receptor blocker BQ788. This effect was accompanied by a decrease in ETRA, ETRB, and VEGFR2 gene expression. However, the baseline angiogenesis was not affected by combined ETA/ETB receptor blockade. Conclusion: During chicken embryogenesis, the LPS-stimulated angiogenesis, but not baseline angiogenesis, is sensitive to combined ETA/ETB receptor blockade.
KW  - Lipopolysaccharides (LPS)
KW  - Angiogenesis
KW  - Chicken chorioallantoic membrane (CAM)
KW  - Endothelin (ET)
Y1  - 2018
U6  - https://doi.org/10.1159/000492547
SN  - 1015-8987
SN  - 1421-9778
VL  - 48
IS  - 5
SP  - 2084
EP  - 2090
PB  - Karger
CY  - Basel
ER  -