Results 21 to 30 of about 2,118 (196)
The ultraviolet habitable zone of exoplanets [PDF]
, 2023 The dozens of rocky exoplanets discovered in the Circumstellar Habitable Zone (CHZ) currently represent the most suitable places to host life as we know it outside the Solar System. However, the presumed presence of liquid water on the CHZ planets does not guarantee suitable environments for the emergence of life. According to experimental studies, the
Borsa, Francesco +4 more
arxiv +3 more sources
The Astrophysical Journal, 2023 We introduce a mathematical framework for statistical exoplanet population and astrobiology studies that may help direct future observational efforts and experiments.
Piero Madau
doaj +2 more sources
The origin of RNA precursors on exoplanets. [PDF]
Sci Adv, 2018 Given that the macromolecular building blocks of life were likely produced photochemically in the presence of ultraviolet (UV) light, we identify some general constraints on which stars produce sufficient UV for this photochemistry. We estimate how much light is needed for the UV photochemistry by experimentally measuring the rate constant for the UV ...
Rimmer PB +5 more
europepmc +2 more sources
The Implications of the Early Formation of Life on Earth [PDF]
arXiv, 2008 One of the most interesting unsolved questions in science today is the question of life on other planets. At the present time it is safe to say that we do not have much of an idea as to whether life is common or exceedingly rare in the universe, and this will probably not be solved for certain unless definitive evidence of extraterrestrial life is ...
Brewer, Brendon J.
arxiv +3 more sources
Ueber die Abiogenesis Huizinga's [PDF]
Pflüger, Archiv für die Gesammte Physiologie des Menschen und der Thiere, 1874 n ...
Richard Gscheidlen
+8 more sources
Pflüger, Archiv für die Gesammte Physiologie des Menschen und der Thiere, 1873 n ...
David Huizinga
openalex +4 more sources
Prebiotic formation of thioesters via cyclic anhydrides as a key step in the emergence of metabolism [PDF]
Scientific ReportsThioesters are high-energy derivatives of carboxylic acids that are essential in the functioning of today’s living cells. Their central role argues in favor of their early introduction in the abiotic reaction network which led to the emergence of life on
Abdelkarim El Qami +5 more
doaj +2 more sources
Undefining life's biochemistry: implications for abiogenesis. [PDF]
J R Soc Interface, 2022 In the mid-twentieth century, multiple Nobel Prizes rewarded discoveries of a seemingly universal set of molecules and interactions that collectively defined the chemical basis for life. Twenty-first-century science knows that every detail of this Central Dogma of Molecular Biology can vary through either biological evolution, human engineering ...
Freeland S.
europepmc +4 more sources
Is Tumorigenesis an Abiogenesis?
Open Access Journal of Cancer & Oncology, 2019 CLN-IgG (Pritumuab) was subjected to clinical trials aiming at regression of brain tumors. The mechanism underlying the dramatic recuperation of cancer patient was considered by means of augmentation of idiotypic antibody-mediated internal image transmission of the vimentin epitope-vipidam. Silencing of prionogenicity of vimentin by chaperonic antibody
Hugwil AV
openalex +2 more sources
New Experiments on Abiogenesis [PDF]
Nature, 1873 HAVING occupied myself for some time past with an experimental study of abiogenesis, I have followed with much interest the controversies on that question in recent numbers of NATURE, and beg leave therefore to state to the readers of this journal the results of my experiments, which form in my opinion a not unimportant contribution to the solution of ...
David Huizinga
openalex +4 more sources