نتایج جستجو برای: we can recognize ancient environmental
تعداد نتایج: 5973958 فیلتر نتایج به سال:
abstract part one: the electrode oxidation potentials of a series of eighteen n-hydroxy compounds in aqueous solution were calculated based on a proper thermodynamic cycle. the dft method at the level of b3lyp-6-31g(d,p) was used to calculate the gas-phase free energy differences ,and the polarizable continuum model (pcm) was applied to describe the solvent and its interaction with n-hydroxy ...
a prerequisite to seismic hazard assessment is to have knowledge of historical and prehistorical earthquakes. to obtain such data, researchers have already practiced different methods including historical seismology, paleoseismology, and recently archaeoseismology. archaeoseismology is a multidisciplinary approach which ideally tries to find the age, epicenter, and magnitude of past earthquakes...
This report provides a rationale for the advances in instrumentation and understanding needed to assess claims of ancient and extraterrestrial life made on the basis of morphological biosignatures. Morphological biosignatures consist of bona fide microbial fossils as well as microbially influenced sedimentary structures. To be recognized as evidence of life, microbial fossils must contain chemi...
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