Results 61 to 70 of about 27,504 (316)
Flavanol monomer-induced changes to the human faecal microflora [PDF]
, 2008 We have investigated the bacterial-dependent metabolism of ( − )-epicatechin and (+)-catechin using a pH-controlled, stirred, batch-culture fermentation system reflective of the distal region of the human large intestine.
Xenofon Tzounis +13 more
core +1 more source
Advanced Science, EarlyView.A solid‐state fermented probiotic (PYW) is developed using wheat bran as substrate, containing high viable Lacticaseibacillus paracasei and bioactive metabolites. PYW alleviates intestinal inflammation by gut microbiota composition, enriching indole derivatives, activating aryl hydrocarbon receptor signaling, and regulating macrophage polarization. PYW
Heng Zhang +11 more
wiley +1 more source
The Importance of Being Imperfect: Structure and Function of Bacterial Amyloid
Advanced Science, EarlyView.Functional bacterial amyloids such as CsgA and FapC have been widely studied to understand the relationship between aggregation and function. The recently solved structure of FapC reveals a Greek‐key motif in which extensive hydrogen bonding and packing interactions formed by residues in conserved imperfect repeats stabilize a β‐solenoid core.
Samuel Peña‐Díaz +12 more
wiley +1 more source
Chemical Diversity of Metal Sulfide Minerals and Its Implications for the Origin of Life
Life, 2018 Prebiotic organic synthesis catalyzed by Earth-abundant metal sulfides is a key process for understanding the evolution of biochemistry from inorganic molecules, yet the catalytic functions of sulfides have remained poorly explored in the context of the ...
Yamei Li, Norio Kitadai, Ryuhei Nakamura
doaj +1 more source
Molecular Precursors of the RNA-World in Space: New Nitriles in the G+0.693−0.027 Molecular Cloud
Frontiers in Astronomy and Space Sciences, 2022 Nitriles play a key role as molecular precursors in prebiotic experiments based on the RNA-world scenario for the origin of life. These chemical compounds could have been partially delivered to the young Earth from extraterrestrial objects, stressing the
Víctor M. Rivilla +15 more
doaj +1 more source
Nitrogen Incorporation in CH_4-N_2 Photochemical Aerosol Produced by Far Ultraviolet Irradiation [PDF]
, 2012 Nitrile incorporation into Titan aerosol accompanying hydrocarbon chemistry is thought to be driven by extreme UV wavelengths (λ120 nm is presently unaccounted for in atmospheric photochemical models.
Jimenez, Jose L. +4 more
core
A thermodynamic basis for prebiotic amino acid synthesis and the nature of the first genetic code
, 2009 Of the twenty amino acids used in proteins, ten were formed in Miller's atmospheric discharge experiments. The two other major proposed sources of prebiotic amino acid synthesis include formation in hydrothermal vents and delivery to Earth via meteorites.
Chakrabarti S. +2 more
core +1 more source
The Prevailing Catalytic Role of Meteorites in Formamide Prebiotic Processes
Life, 2018 Meteorites are consensually considered to be involved in the origin of life on this Planet for several functions and at different levels: (i) as providers of impact energy during their passage through the atmosphere; (ii) as agents of geodynamics ...
Raffaele Saladino +2 more
doaj +1 more source
The Influence of Galactic Cosmic Rays on Ion-Neutral Hydrocarbon Chemistry in the Upper Atmospheres of Free-Floating Exoplanets [PDF]
, 1989 Cosmic rays may be linked to the formation of volatiles necessary for prebiotic chemistry. We explore the effect of cosmic rays in a hydrogen-dominated atmosphere, as a proof-of-concept that ion-neutral chemistry may be important for modelling hydrogen ...
C. Bilger +5 more
core +3 more sources
Prebiotic Organic Microstructures [PDF]
, 2011 Micro- and sub-micrometer spheres, tubules and fiber-filament soft structures have been synthesized in our experiments conducted with 3 MeV proton irradiations of a mixture of simple inorganic constituents, CO, N2 and H2O.
A Yoshihara +26 more
core +2 more sources