Nitric Oxide Metabolic Pathway in Drought-Stressed Nodules of Faba Bean (Vicia faba L.)

Drought is an environmental stress that strongly impacts plants. It affects all stages of growth and induces profound disturbances that influence all cellular functions. Legumes can establish a symbiosis with Rhizobium-type bacteria, whose function is to fix atmospheric nitrogen in organs called nodules and to meet plant nitrogen needs. Symbiotic nitrogen fixation (SNF) is particularly sensitive to drought. We raised the hypothesis that, in drought-stressed nodules, SNF inhibition is partly correlated to hypoxia resulting from nodule structure compaction and an increased O₂ diffusion barrier, and that the nodule energy regeneration involves phytoglobin–nitric oxide (Pgb–NO) respiration. To test this hypothesis, we subjected faba bean (Vicia faba L.) plants nodulated with a Rhizobium laguerreae strain to either drought or osmotic stress. We monitored the N₂-fixation activity, the energy state (ATP/ADP ratio), the expression of hypoxia marker genes (alcohol dehydrogenase and alanine aminotransferase), and the functioning of the Pgb–NO respiration in the nodules. The collected data confirmed our hypothesis and showed that (1) drought-stressed nodules were subject to more intense hypoxia than control nodules and (2) NO production increased and contributed via Pgb–NO respiration to the maintenance of the energy state of drought-stressed nodules.     

Closing Water‐Related Loops in High‐tech Polymer Production – Status,Perspectives and Limitations

Chemical production is inherently associated with the use of a significant amount of water. The closure of water‐related loops to recover materials and reuse water has been established in chemical parks for a long time. Circuits can be realized process‐integrated, across legal entities, or even cross‐sectoral. Incentives can be the lack of natural water resources, to use a high water quality or the recovery of valuables. One example is the recovery of NaCl from salt‐containing process water streams to produce chlorine and caustic soda in the chlor‐alkali electrolysis. However, such reuse schemes exhibit technical, economic and ecological challenges. Taking these into account, industry is taking action to research and develop new, environmentally friendly and economically viable processes.     

Ressourcenschonung und Kreislaufführung in der Prozessindustrie

Efficient use of material and energy flows increases the competitiveness of manufacturing companies and saves the environment at the same time. In order to significantly reduce the use of non-renewable materials and energy, a change from a linear to a closed-loop production process is necessary. In recent years, various closed-loop strategies have been developed, implemented or are in the process of being implemented. In this paper, a brief overview of approaches for a circular economy in the process industry is given.     

博兴洼陷西部沙三段底部地层沉积相划分

博兴洼陷西部花沟地区井资料少，地层的波阻抗差异小，利用常规地震属性分析技术进行沉积相划分，效果不是很好。为此，探讨了利用高精度古地形恢复技术和地震共生体素聚类技术划分沉积相的方法。在古地形恢复技术研究中，重点讨论了关于古地形恢复可靠程度的各种校正及校正界定问题；在地震相分析中，引入了图像处理中的共生体素技术，探讨了地震属性共生体素聚类分析地震相划分技术；最后，综合利用古地形恢复结果和地震属性共生体素地震相分析结果，对研究区的目的层沙三段进行了沉积相划分。     

多元教学模式在高职人力资源管理课程教学中的运用探究

很多高职教师在进行人力资源管理课程教学时,教学方法单一,理论和实践相脱节,致使学生学习兴趣低,"被逃课"率高。针对这些问题,本文提出了基于能力培养的多元教学模式。通过多元教学模式的应用,在传授知识的同时,提高学生自主学习的能力,激发学生的学习兴趣,从而培养学生的基本技能。     

以职业活动为导向的项目课程评价体系的构建与应用

论述构建以职业活动为导向的项目课程评价体系的重要性及其实施方案,提出多元化考核方式的内容及实施措施,以此提高评价质量和促进学生全面发展与个性发展。     

采用多样性选择的量子粒子群双向聚类算法

双向聚类已成为分析基因表达数据的一种重要工具,可以同时从基因和条件两个方向寻找具有相同表达波动的簇。但双向聚类是一种多目标优化的局部搜索算法,处理繁杂的基因数据时容易陷入局部最优。为提高算法的全局搜索能力,提出了一种多样性选择的量子粒子群双向聚类算法（Diversify-Optional QPSO,DOQPSO）。算法首先采用DOQPSO处理基因数据,然后用改进的FLOC算法进行贪心迭代寻找双向聚类,以求得更为理想的结果。算法通过实验仿真,并与FLOC算法和QPSO算法进行比较,结果证明DOQPSO双向聚类算法具有更好的全局寻优能力,且聚类效果更佳。     

多样化实时刚体破碎模拟

目的 现有刚体破碎仿真模拟中,基于物理受力分析的方法往往难以应用在对实时性要求较高的场景中;而基于非物理方法的破碎模拟,破碎效果大多缺乏多样性。为了使得破碎模拟同时满足实时性和破碎效果多样化,提出了一种多样化实时刚体破碎模拟方法。方法 进行破碎模拟时首先由选定的种子点生成类型得到种子点集,采用Sweep Plane算法生成Voronoi图后基于Voronoi图信息对模型进行空间剖分;然后选择破碎时行为模拟方式,对物体破碎时所受外力进行模拟;最后对破碎时碰撞检测及碰撞后碎片的运动过程进行模拟并渲染显示。结果 通过组合不同的种子点生成类型和破碎时行为模拟方式,得到了多样化的刚体破碎效果。对单个刚体进行破碎模拟时,碎片数目不超过200个时帧率可以达到75帧/s,满足实时性的需求;对多个可破碎目标同时存在的复杂场景,破碎仿真模拟的平均帧率可以达到50帧/s,同样满足实时性要求;与现有方法对比的结果也验证了本文方法在计算效率和破碎效果多样性两方面达到了较好的平衡。结论 本文方法在满足实时性要求的同时,丰富了刚体破碎的效果,不同种子点生成类型和破碎时行为模拟方式的组合可以实现破碎效果多样性。     

谈中学英语教学的新思想

针对目前我国基础教育现状,浅析我国中学英语教学中存在的问题,明确全面推进素质教育进程中,教师教学的引导作用和学生自主学习的地位,提出了提高中学英语教学成果的新途径,主张个性化、多元化教学,提倡培养学生的自主、合作的学习能力,体现我国中学英语教学的主体性和发展性。     

高效藻类塘藻菌共生系统的培养

采用生活污水对高效藻类塘进行藻类培养驯化，在水深为0．5m、流速为0．35m／s以及气候适宜的条件下约4d可培养成功。培养完成时优势藻为四尾栅藻（Scenedesmus quadricauda），叶绿素a浓度为0．28mg／L。通过分析塘内NO3^--N和NO2^--N浓度的变化规律发现，在藻、菌培养过程中存在藻类、亚硝酸菌、硝酸菌依次生长过程。高效藻类塘培养简单、启动快，有利于其在农村地区的推广应用。