We describe in detail how we deduce the D/H ratio from absorption lines in the spectra of quasars, and we present our first two measurements o... SB D. Tytler 被引量: 100发表: 2003年 加载更多来源期刊 Nature Physical Science 研究点推荐 helium 3 引用走势 1973 被引量:4 站内活动 ...
They were then classified according to the chemical nature of their chromophores and the spectral properties of the native proteins (Bogorad, 1975; Glazer & Hixson, 1975). Hence, prefixes were introduced to distinguish the phycobiliprotein subclasses: C for Cyanobacteria species, R for Rhodophyta ...
airports with increasingly massive security lines. 2017年考研真题(英语一)阅读理解 Section Ⅱ first, scientific work tends to focus on some aspect of prevailing knowledge that is viewed as incomplete or incorrect. 2012年考研真题(英语一)阅读理解 Section Ⅱ Furthermore, the highest CEO salaries are ...
In both sections T2 and T3a some layers show surfaces which dip up-slope (i.e. to the right). Normal deposition of sediment on slopes is with sediment layering dipping down the slope (as shown by almost all the black lines on the sections). Surfaces which dip up-slope can be for fou...
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Natural bond orbital (NBO) analysis method was performed for the investigation of the relative stability and the nature of the highly strained central bond in [1.1.1]propellane and some [1.1.1]heteropropellane compounds. The results explained that how the p character of natural atomic hybrid orbi...
Lines h... C A,Hills,L R,... - 《British Journal of Cancer》 被引量: 193发表: 1989年 Quantitative characterization of two types of line-spread function near the fovea One of these linespread functions is relatively sustained, while the other has a more transient nature. The properties ...
Nature Nature (全网免费下载) 国家科技图书文献中心 (权威机构) Semantic Scholar dx.doi.org 查看更多 相似文献 参考文献 引证文献Strengthening of moment-resisting frame structures against near-fault ground motion effects Several lines of evidence indicate that diet and dietary behaviors can contribute to hu...
2h, and bilin distances were calculated based on the positions of dots. a Four identified pathways originated from PC are colored orange, brown, cyan, and green, respectively. The pathways in the core are shown as black lines. The bilins with the corresponding proteins and distances are ...
On some statistical aspects of assessing sensitivity of crop varieties X radiation was used to produce mutant lines in rice such as erectoides, early-nraturing, rice-blast-resistant, and other types in 1957. Varying dosages of... BMK Raju 被引量: 3发表: 2002年 ...