上海各高校积极发挥人才、科技、资源等优势，带动被帮扶地区产业发展 eastday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eastday.com Daily Mail and Mail on Sunday newspapers.
By Reuters Staff
13 Min Read
A Facebook post suggesting that pharmaceutical companies, global investment groups and billionaire philanthropists conspired to bring about the COVID-19 pandemic has been shared online.
Reuters Fact Check. REUTERS
The post claims there are links between the organisations and invites readers to consider that they are proof of a conspiracy. It ends with the sentence: “Now you understand how a dead bat sold in a wet market in China infected the ENTIRE PLANET” (here, here, here, here).
Many of the claims have appeared in similar posts debunked by Reuters (here) and other fact checkers (here and here) in December 2020.
上海一学校期末考砸，让对口学区房跌价300万？假的 eastday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eastday.com Daily Mail and Mail on Sunday newspapers.
Credit: SPIE
Laser-induced breakdown spectroscopy (LIBS) is a rapid chemical analysis tool. A powerful laser pulse is focused on a sample to create a microplasma. The elemental or molecular emission spectra from that microplasma can be used to determine the elemental composition of the sample.
Compared with more traditional technology, like atomic absorption spectroscopy and inductively coupled plasma optical emission spectroscopy (ICP-OES), LIBS has some unique advantages: no sample pretreatment, simultaneous multi-element detection, and real-time noncontact measurements. These advantages make it suitable for practical analysis of solids, gases, and liquids.
Traditional LIBS and extensions
Traditional LIBS systems based on a nanosecond pulse laser (ns-LIBS) have some disadvantages due to laser power intensity, long pulse duration, and the plasma shielding effect. These issues adversely affect its reproducibility and signal-to-noise ratio. Femtosecond LIBS (fs-LIBS) can exclude t
上海一学校期末考砸，让对口学区房跌价300万？假的 163.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from 163.com Daily Mail and Mail on Sunday newspapers.