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1. chinaXiv:202107.00013 [pdf]

On the origin of SARS-CoV-2–The blind watchmaker argument

Chung-I Wu; Haijun Wen; Jian Lu; Xiao-dong Su; Alice C. Hughes; Weiwei Zhai; Chen Chen; Hua Chen; Mingkun Li; Shuhui Song; Zhaohui Qian; Qihui Wang; Bingjie Chen; Zixiao Guo; Yongsen Ruan; Xuemei Lu; Fuwen Wei; Li Jin; Le Kang; Yongbiao Xue
Subjects: Biology >> Virology

In the comparison with SARS-CoV of 2003, SARS-CoV-2 is extremely well adapted to the human populations and its adaptive shift from the animal host to humans must have been even more extensive. By the blind watchmaker argument, such an adaptive shift can only happen prior to the onset of the current pandemic and with the aid of step-by-step selection. In this view, SARS-CoV-2 could not have possibly evolved in an animal market in a big city and even less likely in a laboratory. Discussions of the origin of SARS-CoV-2 need to factor in the long process of adaptive shift and some models have indeed advanced in that direction.

submitted time 2021-07-17 Hits15459Downloads1454 Comment 0

2. chinaXiv:201705.00357 [pdf]

Structure and mechanical properties of thick Cr/Cr2N/CrN multilayer coating deposited by multi-arc ion plating

Shan, L [Shan, Lei][ 1,2 ]; Wang, YX [Wang, Yong-xin][ 1 ]; Li, JL [Li, Jin-long][ 1 ]; Li, H [Li, He][ 1 ]; Lu, X [Lu, Xia][ 1 ]; Chen, JM [Chen, Jian-min][ 1 ]

A Cr/Cr2N/CrN multilayer coating with a thickness of 24.4 mu m was deposited by multi-arc ion plating. The coating was systematically characterized by field emission scanning electron microscopy [FESEM], X-ray photoelectron spectrometry [XPS], energy disp

submitted time 2017-05-02 Hits1148Downloads786 Comment 0

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