Human telomeric DNA consists of a tandem array of the G-rich repeat unit d(GGGTTA). A four-stranded helical structure adopted by G-rich sequences was named G-quadruplex (GQ) under physiological condition. The final 3'-terminal residue of the telomeric DNA G-overhang is inherently less precise.
China's 12th Arctic scientific expedition, organized by the Ministry of Natural Resources, returned to Shanghai on Sept. 28 on board XueLong 2. The team set sail from Shanghai on July 12, covering a total distance of 14,000 sea miles in 79 days.
The improvement of high-repetition-rate Nd:YAG laser performances is still a long-standing challenge, although many novel architectures of the laser have been developed. High concentrations of Nd3+ crystals will bring serious thermal effects, possible concentration quenching at strong pump power. However, the high conversion efficiency is difficult to obtain for crystals with low concentrations of Nd3+.
Poloidal field coil #5 (PF5), 17 metres in diameter and close to 350 tonnes, was successfully installed on Sept. 16 on the ITER construction site. According to the TAC1 mission contract with ITER, Institute of Plasma Physics(ASIPP), HFIPS should ensure PF5 coil in the right place of Tokamak pit.
A joint venture with an aim to independently develop, manufacture and sell integrated and cost-competitive helium cryogenic systems and offer related services, was set up on Science Island, Hefei.