نتایج جستجو برای: meteoritic iron
تعداد نتایج: 143039 فیلتر نتایج به سال:
Life beyond Earth may be based on RNA or DNA if such life is related to life on Earth through shared ancestry due to meteoritic exchange, such as may be the case for Mars, or if delivery of similar building blocks to habitable environments has biased the evolution of life toward utilizing nucleic acids. In this case, in situ sequencing is a powerful approach to identify and characterize such li...
We present a study of the reactions of the meteoritic mineral schreibersite (Fe,Ni)3P, focusing primarily on surface chemistry and prebiotic phosphorylation. In this work, a synthetic analogue of the mineral was synthesized by mixing stoichiometric proportions of elemental iron, nickel and phosphorus and heating in a tube furnace at 820 °C for approximately 235 hours under argon or under vacuum...
The possibility of unaccounted for opacity sources in the UV for late-type stars has often been invoked to explain discrepancies between predicted and observed flux distributions and spectral line strengths. Such missing UV-opacity could among other things have a significant impact on abundance determination for elements whose only relevant spectral features are accessible in this wavelength re...
Visual-to-infrared (VIS-IR) remote sensing observations of different classes outer solar system objects indicate the presence water ice and organics. Here, we present laboratory reflectance spectra in 0.5–4.2 μm spectral range binary particulate mixtures ice, organics analogue (kerite), an opaque iron sulphide phase (pyrrhotite) to investigate effects varying mixing ratios, endmember grain size...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید