3篇
您的检索式：作者名="HU Shixiang"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Autotoxicity of Phthalate Esters in Tobacco Root Exudates:Effects on Seed Germination and Seedling Growth显示文摘Autotoxicity is one of the major factors that impede continuous cropping.It is defined as the toxic influence of chemicals released from one plant species on the germination and growth of individuals of the same species.Here, in order to exam the autotoxicity of tobacco root exudates, root exudates were collected from tobacco plants grown both in cultural solution and on natural soil.Using ultraperformance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry, main autotoxic chemical substances in the root exudates were identified.The autotoxic effects of suspected autotoxins on seed germination(including germination rate,germination potential, germination index, and vigor index) and seedling growth were analyzed.Dibutyl phthalate(or diisobutyl phthalate), dioctyl phthalate, and diisooctyl phthalate were identified in tobacco root exudates.It was observed that high concentrations(greater than 0.5 mmol L^(-1)) of each identified phthalate ester caused significant(P < 0.05) inhibition of tobacco seed germination and seedling growth.It can be concluded that phthalate esters such as dibutyl phthalate, diisobutyl phthalate, and diisooctyl phthalate in tobacco root exudates may play an important role in tobacco autotoxicity. | DENG Jiajun ZHANG Yanling HU Jiwei JIAO Jiaguo HU Feng LI Huixin ZHANG Shixiang | 2017 | Pedosphere2017，27，6： | 5 |
| 2 | Generation of ultrafast radially polarized pulses through chirp-assisted femtosecond optical parametric amplification显示文摘Radially polarized beams characterized by an axially symmetric polarization distribution can be sharply focused to produce strong longitudinal fields in the vicinity.Future applications of these beams will be facilitated by the availability of higher powers and shorter durations.Currently,the ultrafast radially polarized pulse is typically generated via wavefront reconstruction from conventional linearly polarized states.Achievable pulse duration and intensity limits are strictly dependent on extra-cavity optics.Herein,a chirp-assisted near-degenerate type-II parametric process is presented as a pulse-energy-scalable method of accessing ultrafast radially polarized pulses.In a proof-of-principle experiment,the broadband gain balance between the orthogonally polarized signal components was realized via controlling the chirp of the pump pulse.Through an analogous pulseduration transfer effect,the radially polarized signal inherited the temporal and spectral characteristics of the pump pulse and maintained the radial polarization state of each frequency component of the signal.With a shorter pump pulse,the generation of few-cycle radially polarized pulses should be achievable,which may facilitate a wide range of ultrafast applications such as vacuum electron acceleration and high-harmonic generation. | SaiSai Hu JieFeng Huang XinHao Ren ChangWen Xu ShiXiang Xu DianYuan Fan HaiZhe Zhong | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，5： | 0 |
| 3 | Application of Artificial Neural Network in Engineering显示文摘This paper mainly studies the dynamic direction of engineering valuation based on the artificial neural network methods,and seeks for a set of rapid,convenient and practical valuation models,for building construction projects. | ZHANG Fan WANG Lei ZHOU Zhou ZHAO Jiaxin ZHANG Sensen HU Shixiang MA Wengang | 2020 | International Journal of Plant Engineering and Management2020，25，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员