以一株分离自小球藻培养体系中的IAA高产菌-农杆菌(Agrobacterium)为研究对象,从生物量积累-抗氧化系统响应-转录组学不同层次揭示了农杆菌对藻细胞生长代谢的影响机制.结果表明,农杆菌与相当浓度水平的外源IAA相比,对小球藻的生长具有更高的促进作用;农杆菌可提高小球藻可溶性糖和蛋白的含量,分别达到纯藻体系的1.34倍和1.43倍;农杆菌可显著提高小球藻SOD活性和降低MDA的含量.转录组
The effective control of the tip-leakage flow and loss is of great significance to improve the aerodynamic performance of the turbine.In this paper,the evolutio
To study the influencing factors of NOx emission in gas-fired heating and hot water combi-boilers,a boiler with the maximum heat input of 26.0 kW was selected,a
目的:建立一种基于DNA Assembly方法的重组腺病毒载体构建方法.方法:首先,通过设计合适的酶切位点及同源臂,采用了传统的限制性内切核酸酶连接方法和DNA Assembly方法获得63
As an effective method to influence end wall flow field,non-axisymmetric profiled end wall can improve the aerodynamic performance of compressor cascades.For a highly loaded low pressure compressor cascade,called V103,the study found the optimal non-axisy
As an efficient and energy-saving heat exchange technology, horizontal tube falling film evaporation has a great application prospect in refrigeration and air conditioning. The three-dimensional models of falling film flow evaporation outside horizontal s
美国西海岸地区ShakeAlert地震预警系统能够在破坏性地震波到达前发布地震警报,从而减轻地震造成的灾害.经过近十余年的发展,ShakeAlert系统研发已基本完成,2019年10月17日,ShakeAlert 2.0系统开始在加利福尼亚全州进行测试,正式向全州公众发布地震预警信息.本文回顾了ShakeAlert 2.0地震预警系统的发展历程,详细介绍了台站观测系统、数据传输系统、数据处理与警报
The utilization of powdery semi-coke as a power fuel in pulverized coal-fired power plants has become a new and potential technique to consume the excess powder
以单元设计为视角,进行专题学习中题组设计的策略研究,既要关注学生学习需求的差异性,又要体现不同层次要求下题组呈现的价值,从而促进学生的数学思考与内化,提升解决实际问
以番茄(Solanum lycopersicum L.)为实验材料,通过水培实验研究了镉(Cadmium,Cd)胁迫下外源喷施茉莉酸甲酯(Methyl jasmonate,MeJA)对番茄幼苗生长及镉抗性的影响.结果表明,与单一的Cd处理相比,2.5μmol/L的外源MeJA可有效提升番茄幼苗的生物量,其地上部与地下部的鲜重分别增加92.47%和89.27%,干重分别增加了82.89%和27.78%,对Cd的抗性指数提高了80.24%.此外,MeJA可调节幼苗抗氧化酶的活性及抗氧化物质含量,使得地下部谷胱