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共轭亚油酸抗缺氧效果及其机制的探讨 总被引:5,自引:0,他引:5
为了探讨共轭亚油酸的抗缺氧效果,分别以浓度为1.5%,0.5%,0.1%和0%(对照)的共轭亚油酸给小鼠灌胃,连续10d,在常压缺氧条件下测定小鼠存活时间,并测定小鼠心肌和骨骼肌肌红蛋白含量,结果显示,在浓度为0.5%时,CLA能显著提高小鼠在缺氧条件下的生存时间,并显著提高小鼠心肌和骨骼肌肌红蛋白含量。 相似文献
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The alteration types of the large-scale Tsagaan Suvarga Cu-Mo porphyry deposit mostly comprise stockwork silicification, argillization, quartz-sericite alteration, K-silicate alteration, and propylitization. The mineralized and altered zones from hydrothermal metallogenic center to the outside successively are Cu-bearing stockwork silicification zone, Cu-beating argillized zone, Cu-Mo-bearing quartz-sericite alteration zone, Cu-Mo-bearing K-silicate alteration zone, and pro- pylitization zone. The K-silicate alteration occurred in the early phase, quartz-sericite alteration in the medium phase, and argillization and carbonatization (calcite) in the later phase. Ore-bearing-altered rocks are significantly controlled by the structure and fissure zones of different scales, and NE- and NW-trending fissure zones could probably be the migration pathways of the porphyry hydrothermal system. Results in this study indicated that the less the concentrations of REE, LREE, and HREE and the more the extensive fractionation between LREE and HREE, the closer it is to the center circulatory hydrothermal ore-forming and the more extensive silicification. The exponential relationship between the fractionation of LREE and HREE and the intensity of silicification and K-silicate alteration was found in the Cu-Mo deposit studied. The negative Eu anomaly, normal Eu, positive Eu anomaly and obviously positive Eu anomaly are coincident with the enhancement of Na2O and K2O concentrations gradually, which indicated that Eu anomaly would be significantly controlled by the alkaline metasomatism of the circulatory hydrothermal ore-forming system. Therefore, such characteristics as the positive Eu anomaly, the obvious fractionation between LREE and HREE and their related special alteration lithofacies are suggested to be metallogenic prognostic and exploration indications for Tsagaan Suvarga-style porphyry Cu-Mo deposits in Mongolia and China. 相似文献
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当代特殊钢发展动向是均质化,已成为世界范围内技术进步的标准和目标,从均质化出发,结合国内外工艺路线,生产模式和产品的实地调研,讨论了连铸一模铸的本质,探讨了技术改造的着力点。 相似文献
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星星峡岩群广泛分布于东天山卡瓦布拉克至星星峡一带,为一套变质程度不均匀的变质岩系。自1965年首次提出至今已50余年,虽历经多次厘定,但因其内部成分较为复杂,需进一步解体、划分,对其原岩性质以及形成的构造环境也有不同的认识。星星峡地区星星峡岩群变粒岩、片岩、千枚岩具有明显的Nb、Ta负异常,Cr/Zr小于1,轻、重稀土分馏较强。正斜长角闪岩稀土配分模式曲线右倾不明显(La_N/Yb_N=0.80~2.84,LREE/HREE=1.45~3.61),而副斜长角闪岩呈明显右倾(La_N/Yb_N=5.89,LREE/HREE=6.10),重稀土含量相对较低。星星峡岩群原岩为一套沉积-火山岩建造,变质程度为绿片岩相-角闪岩相,沉积岩源区物质主要为长英质岩石,有少量镁铁质贡献,火山岩多为酸性火山碎屑岩和基性火山岩。星星峡地区星星峡岩群可划分为3个岩组,解体出原属星星峡岩群的变质花岗岩和中性火山岩,分别划归新元古代花岗岩和泥盆纪花岗岩。星星峡岩群形成于活动大陆边缘,火山岩属陆缘弧岩浆岩,晚期沉积岩可能形成于较为低能的弧间盆地。 相似文献
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张宝琛 《卫星电视与宽带多媒体》2021,(3):150-151
随着新媒体时代的出现,传统的报纸新闻采编工作受到了比较大的冲击,这主要体现在工作落实流程上.基于新的时代发展背景,对纸质媒体体系未来的发展策略进行明确是非常必要的,能够保证不同类型的纸质媒体在运行与发展的过程中收获到最大的综合效益,从根本上发挥出巨大的潜在价值.基于此,本文就新媒体时代对报纸新闻采编工作的影响展开了分析,并且提出了针对性的应对措施. 相似文献
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