Results 131 to 140 of about 1,043,960 (288)
The Astrophysical JournalHydrogen cyanide (HCN) is crucial for the RNA World hypothesis, forming biomolecules essential for early life. Life likely emerged around 4 billion yr ago during the early Archean Eon, a period on Earth with a fainter Sun, frequent impacts, and a weakly ...
Gergely Friss +3 more
doaj +1 more source
Fundamental Molecules of Life are Pigments which Arose and Evolved to Dissipate the Solar Spectrum
, 2014 The driving force behind the origin and evolution of life has been the thermodynamic imperative of increasing the entropy production of the biosphere through increasing the global solar photon dissipation rate.
Michaelian, Karo, Simeonov, Aleksandar
core +2 more sources
Prebiotic Chemistry within a Simple Impacting Icy Mixture
The Journal of Physical Chemistry A, 2013 We present results of prebiotic organic synthesis in shock compressed mixtures of simple ices from quantum molecular dynamics (MD) simulations extended to close to equilibrium time scales. Given the likelihood of an inhospitable prebiotic atmosphere on early Earth, it is possible that impact processes of comets or other icy bodies were a source of ...
Goldman, Nir, Tamblyn, Isaac
openaire +4 more sources
iMetaOmics, EarlyView.The “efficacy paradox” of phytochemicals, low bioavailability yet significant health benefits, is associated with gut microbiota, which biotransforms dietary precursors into bioactive metabolites, enabling systemic effects. Thus, health outcomes of diet depend not just on intake “the rainbow”, but on gut microbial metabolism, redefining “you are what ...
Peng Yang, Ren‐You Gan
wiley +1 more source
, 2012 We analyze limited enantioselective (LES) autocatalysis in a temperature gradient and with internal flow/recycling of hot and cold material. Microreversibility forbids broken mirror symmetry for LES in the presence of a temperature gradient alone.
Blanco, Celia +5 more
core +1 more source
Journal of Periodontology, EarlyView.Abstract Background Bifidobacterium animalis subsp. lactis HN019 (B. lactis HN019) is a probiotic bacterial strain with immunomodulatory properties. Its benefits have been observed in healthy and systemically compromised animals with periodontitis (PD). Our objective was to investigate the local and systemic effects of the systemic administration of B.
Átila V. V. Nobre +10 more
wiley +1 more source
The future of periodontology: Emerging technologies and conceptual shifts
Journal of Periodontology, EarlyView.Abstract Periodontology is entering a transformative era driven by advances in diagnostics, therapeutics, and digital integration. Emerging technologies and conceptual shifts are currently reshaping the specialty, with a focus on predictive, preventive, and personalized care.
Michael S. Reddy
wiley +1 more source
Oligoglyceric acid synthesis by autocondensation of glyceroyl thioester [PDF]
The autocondensation of the glyceroyl thioester, S-glyceroyl-ethane-thiol, yielded olioglyceric acid. The rates of autocondensation and hydrolysis of the thioester increased from pH 6.5 to pH 7.5 in 2,6-lutidine and imidazole buffers.
Weber, A. L.
core +1 more source
Formation of hydroxylamine on dust grains via ammonia oxidation
, 2015 The quest to detect prebiotic molecules in space, notably amino acids, requires an understanding of the chemistry involving nitrogen atoms. Hydroxylamine (NH$_2$OH) is considered a precursor to the amino acid glycine.
Garrod, Robin T. +3 more
core +3 more sources
Journal of Periodontology, EarlyView.Abstract Background Gingivitis is a prevalent and reversible inflammatory condition driven by microbial dysbiosis. Beyond plaque control, interest has grown in oral hygiene formulations capable of modulating inflammation while preserving key microbial functions. Extra virgin olive oil (EVOO), together with xylitol and betaine, has demonstrated clinical
Francisco Mesa +5 more
wiley +1 more source