Qingshuang Zhang

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Iso-suillin, an isomer of suillin that belongs to the prenylphenol class of fungal derivatives, was isolated from petroleum ether extracts of Suillus flavus. The IC50 value of iso-suillin in K562 cells was 0.87 μM, which was lower than the positive control cisplatin (19.33 μM). Iso-suillin-treated K562 cells exhibited an increased rate of apoptosis,(More)
Faster-than-Nyquist signaling is a promising waveform scheme in the fifth generation mobile communications for achieving higher spectrum efficiency. However, the FTN-caused intentional intersymbol interference will make the dectection process more complex. In this paper, a new precoding scheme is proposed for faster-than-Nyquist (FTN) signaling system(More)
In this paper, we propose a design method for short block length low-density parity-check (LDPC) codes which use the structure of semi-random parity-check matrix and the optimal degree distribution pairs derived from density evolution algorithm. Simulation results show that the bit error performance of the designed code is better than Turbo codes with the(More)
In this paper, we propose a selectively polarized concatenation structure for polar codes. We first divide the polarized bit-channels into three types, i.e., good, intermediate and bad bit-channels according to their Bhattacharyya parameter. Then, through combining several information blocks, the intermediate bit-channels are further polarized to enhance(More)
We present a metal-free [2 + 2 + 2] cycloaddition of ynamides with nitriles that enables highly efficient access to 2,4-diaminopyridines. This catalytic protocol is more environmentally friendly and allows for a concomitant construction of C-C and C-N bonds between ynamides and nitriles, exhibiting excellent chemoselectivity, regioselectivity, and wide(More)
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