Using lightly polluted water of WenYu River in Beijing as the research object and making use of electrochemistry method to treat it,the effects of the changes of the chloride concentration in the water and cell voltag...
Using lightly polluted water of WenYu River in Beijing as the research object and making use of electrochemistry method to treat it,the effects of the changes of the chloride concentration in the water and cell voltage on removing pollutants were *** results revealed that electrochemical oxidation method could partly remove ammonia NH-N,TN and COD,the highest removal rate of the NH-N,TN and COD were able to achieve 95%,89%and 68%*** the higher the chloride concentration in the water,the higher the removal rate to pollutants,along with the increase of cell voltage,the removal rates of pollutants increased *** the addition of the chloride concentration and the increase of cell voltage both have their limitations,in this way,the removal rates of the pollutants could be guaranteed. Considering the power consumption and other factors,the optimal running conditions of this experiment were the electrolysis time 20 min,the cell voltage 7 V,the chloride solution concentration of the addition 5.0mol/L and the dosing amount 2 L/*** the course of chemical reaction of electrochemical process was expressed too.
The root-associated microbiota plays an important role in the response to environmental stress. However, the underlying mechanisms controlling the interaction between salt-stressed plants and microbiota are poorly und...
The root-associated microbiota plays an important role in the response to environmental stress. However, the underlying mechanisms controlling the interaction between salt-stressed plants and microbiota are poorly understood. Here, by focusing on a salt-tolerant plant wild soybean (Glycine soja), we demonstrate that highly conserved microbes dominated by Pseudomonas are enriched in the root and rhizosphere microbiota of salt-stressed plant. Two corresponding Pseudomonas isolates are confirmed to enhance the salt tolerance of wild soybean. Shotgun metagenomic and metatranscriptomic sequencing reveal that motility-associated genes, mainly chemotaxis and flagellar assembly, are significantly enriched and expressed in salt-treated samples. We further find that roots of salt stressed plants secreted purines, especially xanthine, which induce motility of the Pseudomonas isolates. Moreover, exogenous application for xanthine to non-stressed plants results in Pseudomonas enrichment, reproducing the microbiota shift in salt-stressed root. Finally, Pseudomonas mutant analysis shows that the motility related gene cheW is required for chemotaxis toward xanthine and for enhancing plant salt tolerance. Our study proposes that wild soybean recruits beneficial Pseudomonas species by exudating key metabolites (i.e., purine) against salt stress.
Two-terminal optoelectronic synaptic devices have attracted increasing attention owing to their simplicity of structures, which facilitate the device integration in neuromorphic computing systems. However, synaptic-we...
详细信息
Two-terminal optoelectronic synaptic devices have attracted increasing attention owing to their simplicity of structures, which facilitate the device integration in neuromorphic computing systems. However, synaptic-weight updates and self-rectifying properties in two-terminal optoelectronic synaptic devices are inferior. Here, we fabricate two-terminal optoelectronic synaptic devices in accordance with the hybrid structure of optically active layers MAPbI(3) and electron transport layers (ETLs) SnO2 in an n-i-p planar system, where MAPbI3 and SnO2 are used for generating and trapping carriers, respectively. Synaptic functionalities such as excitatory post-synaptic current (EPSC), paired-pulse facilitation (PPF), spike-number dependent plasticity (SNDP), and spike-rate dependent plasticity (SRDP) are all successfully mimicked without external bias. These synaptic devices possess self-rectifying properties with a highest ratio of similar to 0.3 x 10(3) and their synaptic weight exhibits largest-dynamic-range updates of 14.3 within 14 seconds among the reported two-terminal optoelectronic synaptic devices. Furthermore, the spike-number tunability of EPSC in the synaptic devices leads to the realization of straight running of agrimotor driverless technology. Results dramatically promote the development of two-terminal optoelectronic synaptic devices in neuromorphic computing.
暂无评论