Results 71 to 80 of about 2,457 (208)

THE PROTOBIOLOGICAL THEORY OF CEILINGS AND FLOORS, OR CHEMICAL EVOLUTION AS A PLANETARY PROCESS [PDF]

Filozofia i Nauka
The article presents a modern protobiological theory based on the classical archetype. It connects the issues of origins of life with the theory of the hierarchy of matter and recognizes that error correction occurs within hierarchical and dynamic living
Alicja Kubica
doaj   +1 more source

Defined folding pattern of poly(rG) supports inherent ability to encode biological information

Biopolymers, Volume 115, Issue 6, November 2024.
Abstract The RNA World hypothesis posits that RNA can represent a primitive life form by reproducing itself and demonstrating catalytic activity. However, this hypothesis is incapable of addressing several major origin‐of‐life (OoL) questions. A recently described paradox‐free alternative OoL hypothesis, the Quadruplex (G4) World, is based on the ...
Nickolas Kankia, Levan Lomidze, Skylar Stevenson, Karin Musier‐Forsyth, Besik Kankia   +4 more
wiley   +1 more source

The evolution and history of Vinca alkaloids: From the Big Bang to the treatment of pediatric acute leukemia

Pediatric Blood &Cancer, Volume 71, Issue 11, November 2024.
Abstract An attractive flower from the island of Madagascar has in part saved the lives of thousands of children with acute lymphoblastic leukemia (ALL). Random mutations and alterations to the genome led to the evolution of genes encoding enzymes, which would provide the periwinkle flower an arsenal of secondary metabolites to survive within the ...
Jeffrey W. Taub, Steven A. Buck, Ana C. Xavier, Holly Edwards, Larry H. Matherly, Yubin Ge   +5 more
wiley   +1 more source

The remarkable cell: Intelligently designed or by evolutionary process?

Verbum et Ecclesia, 2013
The objective of this article was to deal with the challenging theme of the Origin of Life. Science has been arguing the when and how of the beginning of life for centuries.
Mark Pretorius
doaj   +1 more source

Toward homochiral protocells in noncatalytic peptide systems

, 2009
The activation-polymerization-epimerization-depolymerization (APED) model of Plasson et al. has recently been proposed as a mechanism for the evolution of homochirality on prebiotic Earth.
A Brack, A Brandenburg, A Brandenburg, A Commeyras, A Lazcano, B-M Rode, C Shen, C Viedma, CJ Welch, D Castelvecchi, D Deamer, D Deamer, D Deamer, D Segrè, D-G Blackmond, D-K Kondepudi, F-C Frank, G Wächtershäuser, G-F Joyce, G-F Joyce, H-J Morowitz, J-A Wattis, J-D Gunton, J-S Langer, J-W Szostak, JD Dunitz, K Soai, L Leman, M Fishkis, M Gleiser, M Gleiser, M Gleiser, M Huber, M Huber, M Reches, M Reches, M-P Robertson, Marcelo Gleiser, N Berclaz, N Berclaz, P-A Monnard, P-G-H Sandars, R Cotterill, R Lathe, R Lathe, R Plasson, R-M Smith, R-P Bywater, S Fox, S Fox, S Fox, S Lonchin, S Rasmussen, S Santoso, S Vauthey, S-L Miller, Sara Imari Walker, UJ Meierhenrich, V-A Avetisov, W-A Bonner, Y Saito, Y Saito   +61 more
core   +1 more source

Autonomous Development of Compositional Diversity in Self‐Spreading Flat Protocells

ChemSystemsChem, Volume 6, Issue 6, November 2024.
We present a feasible pathway leading to a rudimentary type of protocell diversity and speciation based on the fusion of flat giant unilamellar lipid vesicles on solid surfaces. Abstract An experimental pathway to the spontaneous generation of compositionally diverse synthetic protocells is presented.
İrep Gözen, Stephen Mann, Aldo Jesorka
wiley   +1 more source

Factoring Origin of Life Hypotheses into the Search for Life in the Solar System and Beyond

Life, 2020
Two widely-cited alternative hypotheses propose geological localities and biochemical mechanisms for life’s origins. The first states that chemical energy available in submarine hydrothermal vents supported the formation of organic compounds and ...
Alex Longo, Bruce Damer
doaj   +1 more source

IR SPECTRAL MAPPING OF THE MARTIAN SOUTH POLAR RESIDUAL CAP USING CRISM [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Polycyclic aromatic hydrocarbons (PAHs) are considered to be important in theories of abiogenesis (Allamandola, 2011) . There is evidence that PAHs have been detected on two icy Saturnian satellites using the Visual and Infrared Mapping Spectrometer ...
J. Campbell, J. Campbell, P. Sidiropoulos, J.-P. Muller   +3 more
doaj   +1 more source

The Roles of Possibility and Mechanism in Narrative Explanation [PDF]

, 2018
There is a fairly longstanding distinction between what are called the ideographic as opposed to nomothetic sciences. The nomothetic sciences, such as physics, offer up explanations in terms of the laws and regular operations of nature.
Swaim, Daniel G.
core  

Biophysical Approach to Understand Life and Cancer

Aging and Cancer, Volume 5, Issue 3, Page 70-90, September 2024.
ABSTRACT Background From the perspective of biology, the characteristics of life can be categorized as cellular organizations, homeostasis, metabolism, growth, reproduction and heredity, response to stimuli and adaptation to the environment. From the perspective of physics, living organisms are highly ordered, complex, thermodynamically open systems ...
Nuri Faruk Aykan
wiley   +1 more source