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Greenhouse gas emission has serious impacts on human societies, ecosystems and economies as a result of global climate change. In response to this challenge, the global community has set greenhouse gas reduction targets aimed at reducing emissions of greenhouse gases such as carbon dioxide (CO2). In terms of emission reduction technology, CO2 geological storage technology is considered to be an important and potential solution. The wide application of CO2 geological storage technology can help achieve greenhouse gas reduction targets and slow down the greenhouse effect of the earth. The research will explore the role of CO2 geological storage technologies for global greenhouse gas emission reduction targets. Through extensive collection of relevant information on CO2 geological storage technology around the world, comprehensive research and analysis of the principle, application cases, limiting challenges and environmental impact of this technology, to evaluate the prospects and prospects of CO2 geological storage technology in achieving global emission reduction goals challenge. The study found that the geological storage of CO2 can promote the reduction of global greenhouse gas emissions, and its long-term effect will be more obvious, and the advantages will be more obvious with the improvement of technology and the cooperation between international governments.

To survive, many pathogens extract heme from their host organism and break down the porphyrin scaffold to sequester the Fe2+ ion via a heme oxygenase. Recent studies have revealed that certain pathogens can anaerobically degrade heme. Our own research has shown that one such pathway proceeds via NADH-dependent heme degradation, which has been identified in a family of hemoproteins from a range of bacteria. HemS, from Yersinia enterocolitica, is the main focus of this work, along with HmuS (Yersinia pestis), ChuS (Escherichia coli) and ShuS (Shigella dysenteriae). We combine experiments, Energy Landscape Theory, and a bioinformatic investigation to place these homologues within a wider phylogenetic context. A subset of these hemoproteins are known to bind certain DNA promoter regions, suggesting not only that they can catalytically degrade heme, but that they are also involved in transcriptional modulation responding to heme flux. Many of the bacterial species responsible for these hemoproteins (including those that produce HemS, ChuS and ShuS) are known to specifically target oxygen-depleted regions of the gastrointestinal tract. A deeper understanding of anaerobic heme breakdown processes exploited by these pathogens could therefore prove useful in the development of future strategies for disease prevention. [ABSTRACT FROM AUTHOR]

Featured Application: The results of this work can be included in the design stage of interior permanent-magnet synchronous motors for aircraft drive applications. The torque performance of the interior permanent-magnet synchronous motor (IPMSM) must be further improved to satisfy the growing demand of aircraft drive application. To this end, this article focuses on the design optimization of the IPMSM structure in the aircraft drive systems to improve the torque density and reduce the torque ripple. A special fractional-slot winding and ∇-type magnetic-pole rotor topology are proposed as the optimized IPMSM structure compared with the structure of an existing motor. The simulations of the original and optimized structures at different current values reveal the variance of the torque in the average and ripple, mechanical and external characteristics, efficiency and steady-state temperature. The performance of an optimized prototype is analyzed by experimental testing, and the results show that an optimized motor has a higher torque density and lower torque ripple than the original one at the same speed and rated power, but it also has a higher temperature rise. However, the temperature rise value is acceptable in the experimental testing condition, so the validity of the design optimization method for the proposed structure is verified. [ABSTRACT FROM AUTHOR]