A thorough investigation on the constitution of Mn-Ga alloys has been made by means of X-rays incorporated with differential thermal analysis. The system appears to be important in that highly ferromagnetic alloys hav...A thorough investigation on the constitution of Mn-Ga alloys has been made by means of X-rays incorporated with differential thermal analysis. The system appears to be important in that highly ferromagnetic alloys have been found in the Mn-Al system near the equiatomic composition after special treatment, and Ga belongs to the same group as Al in the periodic table. Forty-three alloys were prepared in展开更多
基金supported by the Second Tibetan Plateau Scientific Expedition and Research Program(2022QZKK0101)the National Natural Science Foundation of China(41988101,42001104,and 41975140)+1 种基金the National Key Scientific and Technological Infrastructure Project“Earth System Science Numerical Simulator Facility”(Earth Lab,201715003471104355)the Innovation Program for Young Scholars of TPESER(TPESER-QNCX2022ZD-01)。
文摘A thorough investigation on the constitution of Mn-Ga alloys has been made by means of X-rays incorporated with differential thermal analysis. The system appears to be important in that highly ferromagnetic alloys have been found in the Mn-Al system near the equiatomic composition after special treatment, and Ga belongs to the same group as Al in the periodic table. Forty-three alloys were prepared in
文摘有关动物适应异质性海拔环境的研究,已在表型、解剖学、生理学、基因组学和转录组学等方面广泛开展,但是很少关注小RNA(micro RNAs或miRNAs)的生态适应性功能.草原毛虫是青藏高原高寒草地的重要害虫,并对不同海拔环境产生了良好的适应性.为此,本研究以两种栖息于青藏高原不同海拔环境的黄斑草原毛虫和门源草原毛虫为研究对象,基于Illumina Hi Seq技术对这两种草原毛虫的miRNA转录组进行了高通量测序.结果表明,两种草原毛虫中共鉴定到109个成熟miRNAs,其中47个为保守miRNAs.在所有miRNAs种,共有9个miRNAs的表达水平在两种草原毛虫间存在显著差异性.对这9个差异性表达的miRNAs采用实时荧光定量PCR进行验证,发现8个基因的表达水平与高通量测序结果完全一致.功能分析表明,差异性表达的miRNAs共预测到93个靶基因.这些靶基因主要富集到脂、核酸和维生素等代谢或衰老相关的GO条目,并与代谢、抗寒和低氧等KEGG通路相关(如AMPK信号通路、Wnt信号通路和m TOR信号通路).这些研究表明,miRNAs在草原毛虫对异质性海拔环境的适应性进化过程中具有重要作用.该研究加深了对青藏高原特有昆虫适应高海拔环境的遗传基础的理解.
