Fluorene is a polycyclic aromatic hydrocarbon,which is a hazardous toxic chemical in the environment.The measurement of low concentrations of fluorene is a subj
We study evolutionary games in two-layer networks by introducing the correlation between two layers through the C2dominance or the D-dominance.We assume that in
本试验以黑果枸杞组培苗顶端叶片、组培苗茎尖为试材,以秋水仙素为诱导剂,采用施入法,对黑果枸杞进行多倍体诱导,初步摸索出适合黑果枸杞的多倍体诱导及鉴定方法,并获得了一些多倍体植株,为进一步规模化繁殖及推广奠定了基础。结果如下:1、采用施入法分别处理黑果枸杞组培苗顶端叶片、组培苗茎尖两种材料,其中两种处理材料在秋水仙素溶液浓度为500 mg·L-1,处理7d的存活率均较接近半致死剂量,此为秋水仙素溶液
The simple surface current model is extended to study the generation of high-order harmonics for a relativistic circularly polarized laser pulse interacting wit
A high intrinsic quality factor (Qo) of a superconducting radio-frequency cavity is beneficial to reducing the operation costs of superconducting accelerators.N
The above-threshold detachment of F-ions induced by a linearly polarized few-cycle laser pulse is investigated theoretically using the strong-field approximatio
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The gauge extension of the standard model with the U(1)B-L+xY symmetry predicts the existence of a light gauge boson Z’with small couplings to ordinary fermion
<正> 电视新闻是通过电子手段对新近发生或发现的事实所进行的报道。电视新闻作为一种新闻传播手段比其他新闻媒介有无可比拟的优越性。它运用现代电子技术,通过电视屏幕,形象地向观众传达新闻信息。这种视听结合、声画并茂的特点,大大强化了新闻形象,使观众从耳闻目睹中找到新的满足。
由灰葡萄孢菌侵染引起的番茄灰霉病是当前番茄生产上重要的世界性病害,尤以设施栽培条件下发生较重。番茄灰霉菌的寄主很广,已报道的寄主至少有235种,它能危害多种粮食作物、