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Shujie Zhang,Lisong Fu,Zhaowei Yang,Mengke Jing,Ziwei Zhang,Shijian Xiang,Rui Wang 한국섬유공학회 2021 Fibers and polymers Vol.22 No.4
In view of the problems that traditional woven surgical gowns are prone to cross infection in blocking blood andliquid spillage, cellulose acetate (CA)/polylactic acid (PLA) nonwoven materials were prepared to improve the functionalrequirements of surgical materials in combination with the rapidly developing green fibers. Fiber mixing ratio, fiber webareal weight and water jet pressure were selected to optimize the preparation process of cellulose acetate/polylactic acid (CA/PLA) nonwoven materials with moisture permeability and filtration efficiency. The results showed that the fiber mixing ratiowas 49:51, and the fiber web areal weight was 130 g/m2, and the water jet pressure was 7 MPa. Under this process, moisturepermeability is 5240.86 g/(m2·h), and the filtration efficiency is 38.12 %, which is close to the theoretical value. It shows thatthe response surface method has practical application value, indicating that the response surface method has practicalapplication value, and can provide a theoretical basis for the preparation process parameters of barrier and comfort nonwovensurgical gowns at the same time.
Dynamics of a High‑voltage Switchgear System Excited by Earthquake
Tao Sun,Wei Wang,Shuji Yang,Ling Li 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.2
Mechanical failure of the high-voltage switchgear induced by vibration will cause the fault of electric system. It is necessary to evaluate the dynamic characteristics of switchgear in advance. In this paper, a numerical dynamic model of the whole switchgear system excited by earthquake is developed in Finite Element Method. Vibration characteristics are acquired by modal analysis. Structural deformation, under the seismic load, is also obtained in response spectrum analysis. Modal analysis indicates that resonance of system is not serious. While, results from response spectrum analysis show a largest deformation in rear cabinet wall, which is consistent with the deformation trend shown in modal shapes. The experiment data in the fnished Shaking Table Test show an agreement with simulation results as well. Analysis results show that the switchgear has a good aseismic performance
Trp-tRNA synthetase bridges DNA-PKcs to PARP-1 to link IFN-款 and p53 signaling
Sajish, Mathew,Zhou, Quansheng,Kishi, Shuji,Valdez Jr, Delgado M,Kapoor, Mili,Guo, Min,Lee, Sunhee,Kim, Sunghoon,Yang, Xiang-Lei,Schimmel, Paul Nature Publishing Group, a division of Macmillan P 2012 NATURE CHEMICAL BIOLOGY Vol.8 No.6
Interferon-款 (IFN-款) engenders strong antiproliferative responses, in part through activation of p53. However, the long-known IFN-款??dependent upregulation of human Trp-tRNA synthetase (TrpRS), a cytoplasmic enzyme that activates tryptophan to form Trp-AMP in the first step of protein synthesis, is unexplained. Here we report a nuclear complex of TrpRS with the catalytic subunit of DNA-dependent protein kinase (DNA-PKcs) and with poly(ADP-ribose) polymerase 1 (PARP-1), the major PARP in human cells. The IFN-款??dependent poly(ADP-ribosyl)ation of DNA-PKcs (which activates its kinase function) and concomitant activation of the tumor suppressor p53 were specifically prevented by Trp-SA, an analog of Trp-AMP that disrupted the TrpRS??DNA-PKcs??PARP-1 complex. The connection of TrpRS to p53 signaling in vivo was confirmed in a vertebrate system. These and further results suggest an unexpected evolutionary expansion of the protein synthesis apparatus to a nuclear role that links major signaling pathways.