Concentration time-histories of H2O were measured behind reflected shock waves during hydrogen combustion. Ex-periments were conducted at temperatures of 1117–
多酚类物质是茶树次生代谢的特征成分,同时也是茶叶有益人体健康的重要组成成分,影响着茶叶色泽、香气、滋味等感官品质的形成。茶树的多酚类物质及其衍生物种类复杂多样,其生物合成主要途径涉及莽草酸途径,苯丙烷代谢途径和类黄酮合成途径,同时还涉及一些衍生化途径,如甲基化、酰基化、糖苷化和羟基化等。本文重点研究酚类物质糖苷化和羟基化的相关基因及其功能,能够为深入了解茶树多酚类物质代谢调控提供基础,对于开展茶树
针对无土栽培存在的不足和延吉地区蔬菜产业发展现状,本试验通过研究不同基质配比对有机生态型无土栽培生菜、黄瓜、辣椒、番茄、草莓的影响,调查这几种蔬菜从植株生长到采后
Recently,theoretical and experimental nano-sized fundamental devices for optical circuits have been proposed at the single-photon level.The assembly of a realis
A novel flat-flat resonator consisting of two crystals(Nd:YAG+Nd:YVO4)is established for power scaling in a diode-end-pumped solid-state laser.We systematically
方案说明:将家中所有的电灯、电器通过电力线连成网络。用电力线做载体传输控制信号,用电力载波实现网络化控制。电力载波协议是一种“语言”,使用这种语言,所有的电器、电灯
With two-dimensional quantum electrodynamics (QED) particle-in-cell simulations, a dense electron–positron ( e?e+) pair generation from laser-solid interaction
Viscosities of pure Ga,Ga80Ni20,and Ga80Cr20 metallic melts under a horizontal magnetic field were investigated by a torsional oscillation viscometer.A mathemat
桃、李、杏及樱桃等核果类果树的许多种与品种原产我国,优异资源极为丰富。采用远缘杂交技术等创造核果类果树新种质,增加遗传多样性,对于核果类果树种质资源的保护和利用具