不同镁浓度对烟叶氮代谢关键酶活性的影响

为了研究镁对烤烟叶片氮代谢关键酶的影响,以烤烟品种K326为试验材料,采用水培方式,设置不同Mg2+浓度处理,测定了与氮代谢中相关的硝酸还原酶(NR)、谷氨酰胺合成酶(GS)、谷氨酸合成酶(GOGAT)活性。结果表明:在烤烟的生长的不同时期,NR活性呈先降低后升高再降低的趋势,GS活性呈先降低后升高的变化趋势,GOGAT活性呈逐渐减弱的趋势;在同一时期,不同Mg^2+浓度处理下烟叶NR活性有显著差异,Mg^2+浓度为6mmol/L时NR活性和GS活性最强,镁浓度的升高有利于GOGAT活性增强。结果表明Mg2+浓度为6mmol/L时,可提高烟草植株氮代谢关键酶的活性,促进无机氮向有机氮的转化。

Developing a modernized economy from the perspective of ecological civilization

The construction of ecological civilization is to firmly grasp the core purpose of harmonious coexistence between human and nature, and realize the sustainable coexistence and development of human and nature. In the new era of socialism with Chinese characteristics, first, we should put the ecological civilization in a prominent position while building a modernized economy facing the deteriorating ecological environment. Second, we should correctly understand the dialectical relationship between the ecological civilization and the modernized economy. On the one hand, there is a contradictory relationship between the ecological civilization and the modernized economy. On the other hand, they are mutually unified. Therefore,we should put the ecological civilization construction in a prominent position, build a modernized economy under the guidance of the concept of ecological civilization, and alleviate the impact of economic development on the balance of ecosystems. Thus, it can promote a new leap in the harmonious development of human and nature. Third, if the economic development is not coordinated with ecological protection, there must be an unknown human crisis behind the prosperity of economy. Therefore, we should integrate the ecological civilization into the modernized economy and develop the economy on the premise of protecting ecological environment. What's more, there are three aspects needed to pay attention to. First, the establishment and improvement of eco-economic system with modern green development should be accelerated to provide a green development impetus for modernized economy. Next, the establishment and improvement of sci-tech innovation system with modern green development should be accelerated to provide scientific and technological support for the modern green economy system. Finally, the establishment and improvement of institutional constraint system with modern green development should be accelerated to provide institutional guarantee for the modernized economy.

多臂碳纳米管/SBS复合改性沥青高低温性能研究

为探究碳纳米管复配SBS对沥青高温性能改善效果,基于碳纳米管改性沥青特性,掺入一定量SBS复配。以延度、软化点、针入度为指标,结合动态剪切流变试验(DSR),综合分析碳纳米管和SBS掺量对于复合改性沥青高、低温性能的改善效果。试验结果表明:3%SBS与掺量0.6%碳纳米管复配改性沥青,可表现出较好的低温延展性;动态剪切流变试验表明碳纳米管与SBS复配能有效改善沥青的高温流变性能,SBS掺量为3%时,碳纳米管SBS复合沥青高温抗变形能力得到显著提高。

Impacts of environmental problems on the innovation of enterprises

Entering an industrial civilized society,environmental problems have become increasingly prominent.Not only have the number of disasters increased,but the types of disasters have also increased,and the overall losses caused by human disasters have increased significantly.Will the increasingly prominent environmental problems affect the innovation of enterprises?To answer this question,this paper analyzes the impact of environmental problems on the innovation of enterprises from two aspects of technological innovation and management innovation,and puts forward the cost reallocation effect,technology innovation effect,reallocation effect of human resource,and management innovation effect.

试析习近平人与自然和谐共生的思想意蕴

习近平生态文明思想的基础与核心就是人与自然和谐共生的理念。它主要包括尊重自然的生态和谐观、在遵循自然规律的前提下改造自然的生态共生观、系统保护并治理自然的生态系统观、维护人与自然的生命共同体观、构建人与自然的命运共同体观。