排序方式: 共有37条查询结果,搜索用时 31 毫秒
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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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冻干银鱼的营养价值与初步的感官评价 总被引:1,自引:0,他引:1
将新鲜银鱼-70℃速冻后冷冻干燥处理48 h,研究冻干过程中银鱼含水量的变化、冻干银鱼的外观及复水时间,比较冻干银鱼与烘干银鱼的氨基酸组成、粗多糖和4种微量元素的含量.结果显示:冻干银鱼的平均含水量为8.61%,外形、颜色与新鲜银鱼相近,复水性能比烘干银鱼好.冻干银鱼的总必需氨基酸、总氨基酸含量和必需氨基酸指数高于烘干银鱼.冻干银鱼的粗多糖得率低于烘干银鱼,但纯度较高.Fe、Cu、Mn、Zn 4种微量元素的含量没有明显差别.上述结果表明:冷冻干燥法加工的银鱼营养成分与烘干银鱼没有显著差别,但外形、颜色和复水性能明显优于烘干法加工的银鱼,是一种值得深入研究和推广的银鱼加工方法. 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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