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人与地球系统之间的相互作用已成为全球变化的重要驱动力,极地系统是感应全球变化的放大器和指示器极地系统科学进入了一个大科学研究时代。极地系统科学不但是一门研究极地系统对全球变化的响应与反馈作用中运转的机制、规律和控制这些变化的机理,并为区域复杂性及其对全球变化预测提供科学基础的科学,同时也是一门高新技术应用和人类认识自然活动并科学管理极地系统的系统工程学。20年来,中国科学家对极地系统复杂性有了深入的认识,对极地科学考察管理也进行了有益的探索。 相似文献
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Lipid Degradation During Salt‐Fermented Antarctic Krill Paste Processing and Their Relationship With Lipase and Phospholipase Activities
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基于1756Eweb模块的罗克韦尔PLC和计算机通信实现 总被引:1,自引:0,他引:1
介绍了1756Eweb模块的基本原理,设计实现了罗克韦尔PLC通过以太网模块1756Eweb与计算机进行数据通信,并通过在南极冰穹A科考支撑平台中的应用,验证该方法可以有效地对PLC进行实时管理和监控,对于进一步开发应用1756Eweb模块具有一定借鉴意义。 相似文献
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Yatong Wang Quanfu Wang Yanhua Hou Jianan Liu 《International journal of molecular sciences》2022,23(3)
Glutaredoxin (Grx) is an important oxidoreductase to maintain the redox homoeostasis of cells. In our previous study, cold-adapted Grx from Psychrobacter sp. ANT206 (PsGrx) has been characterized. Here, we constructed an in-frame deletion mutant of psgrx (Δpsgrx). Mutant Δpsgrx was more sensitive to low temperature, demonstrating that psgrx was conducive to the growth of ANT206. Mutant Δpsgrx also had more malondialdehyde (MDA) and protein carbonylation content, suggesting that PsGrx could play a part in the regulation of tolerance against low temperature. A yeast two-hybrid system was adopted to screen interacting proteins of 26 components. Furthermore, two target proteins, glutathione reductase (GR) and alkyl hydroperoxide reductase subunit C (AhpC), were regulated by PsGrx under low temperature, and the interactions were confirmed via bimolecular fluorescence complementation (BiFC) and co-immunoprecipitation (Co-IP). Moreover, PsGrx could enhance GR activity. trxR expression in Δpsgrx, Δahpc, and ANT206 were illustrated 3.7, 2.4, and 10-fold more than mutant Δpsgrx Δahpc, indicating that PsGrx might increase the expression of trxR by interacting with AhpC. In conclusion, PsGrx may participate in glutathione metabolism and ROS-scavenging by regulating GR and AhpC to protect the growth of ANT206. These findings preliminarily suggest the role of PsGrx in the regulation of oxidative stress, which could improve the low-temperature tolerance of ANT206. 相似文献
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目的 研究南极多种特殊环境因素对典型有机涂层失效产生的具体作用。方法 以在南极中山站现场暴露1 a的环氧树脂类、聚氨酯类涂层体系为研究对象,通过光泽度测试、色差测试、附着力测试、SEM、EIS、FTIR等方法系统地研究涂层的失效行为,以及中山站环境因素的作用机制。结果 在环氧树脂类涂层表面有肉眼可见的剥落、起泡、微裂纹和坑状损伤,表现出比聚氨酯类涂层更加明显的失光、色差、附着力损失、化学结构变化等;电化学测试结果表明,6种涂层的无划叉试样在暴露1 a后防护性能均有所下降,其低频阻抗模值(|Z|0.01Hz)下降了约1个数量级。其中,环氧树脂类涂层的划叉试样表现出更差的防护性能,其|Z|0.01Hz最大下降了5个数量级,最低达到4.02×104?·cm2,同时聚氨酯类涂层的|Z|0.01 Hz仍保持在1011?·cm2左右。红外测试结果表明,环氧类涂层的部分官能团发生了水解反应,而聚氨酯类涂层没有发生明显的化学结构变化。此外,环氧涂层的附着力损失率较高,最高... 相似文献