Results 11 to 20 of about 477,042 (311)

Thioesters provide a plausible prebiotic path to proto-peptides

open access: yesNature Communications, 2022
One of the early processes enabling the origins of life is thought to be the condensation of building blocks into oligomers and polymers. In this article, the authors report the synthesis of thiodepsipeptides and HS-peptides under mild temperatures and ...
Moran Frenkel-Pinter   +6 more
doaj   +1 more source

The Enclosed Intestinal Microbiome: Semiochemical Signals from the Precambrian and Their Disruption by Heavy Metal Pollution

open access: yesLife, 2022
It is increasingly likely that many non-communicable diseases of humans and associated animals are due to the degradation of their intestinal microbiomes, a situation often referred to as dysbiosis.
David Smith   +2 more
doaj   +1 more source

Microbiome–Gut Dissociation: Investigating the Origins of Obesity

open access: yesGastrointestinal Disorders, 2021
The reduction of excessive weight remains a major public health challenge, with control currently limited to a calorie reduction strategy. Currently, attempts are being made at revisiting the fibre hypothesis based on the African studies of Denis Burkitt,
David Smith, Sohan Jheeta
doaj   +1 more source

Prevalent emergence of reciprocity among cross-feeding bacteria

open access: yesISME Communications, 2022
Explaining the de novo evolution of obligate cooperative cross-feeding interactions among bacteria is a fundamental problem. A critical step during this process is the emergence of reciprocity among two interaction partners, because a mutually beneficial
Samir Giri   +4 more
doaj   +1 more source

Mutually stabilizing interactions between proto-peptides and RNA

open access: yesNature Communications, 2020
Cooperative relationships are widespread among different classes of biopolymers and are predicted to have existed during emergence of life. This study shows that proto-peptides engage in mutually stabilizing interactions with RNA, providing support for ...
Moran Frenkel-Pinter   +9 more
doaj   +1 more source

Physiological characterization of a new thermotolerant yeast strain isolated during Brazilian ethanol production, and its application in high-temperature fermentation

open access: yesBiotechnology for Biofuels, 2020
Background The use of thermotolerant yeast strains can improve the efficiency of ethanol fermentation, allowing fermentation to occur at temperatures higher than 40 °C.
Cleiton D. Prado   +13 more
doaj   +1 more source

Modelling the Chemical Evolution [PDF]

open access: yesProceedings of the International Astronomical Union, 2009
AbstractAdvanced observational facilities allow to trace back the chemical evolution of the Universe, on the one hand, from local objects of different ages and, secondly, by direct observations of redshifted objects. The chemical enrichment serves as one of the cornerstones of cosmological evolution.
Recchi, Simone, Hensler, Gerhard
openaire   +3 more sources

Evolution of Complex Chemical Mixtures Reveals Combinatorial Compression and Population Synchronicity

open access: yes, 2023
Some of the most interesting open questions about the origins of life and molecular sciences center on chemical evolution and the spontaneous generation of complex and functional chemical species.
Adelaide , Robertson   +9 more
core   +1 more source

The methylome of the model arbuscular mycorrhizal fungus, Rhizophagus irregularis, shares characteristics with early diverging fungi and Dikarya

open access: yesCommunications Biology, 2021
Anurag Chaturvedi et al. use long-read PacBio sequencing and LC-MS to profile 5mC and 6mA DNA methylation in the model arbuscular mycorrhizal fungus, Rhizophagus irregularis. Their results suggest that R.
Anurag Chaturvedi   +8 more
doaj   +1 more source

THE CHEMICAL EVOLUTION OF PHOSPHORUS [PDF]

open access: yesThe Astrophysical Journal, 2014
Phosphorus is one of the few remaining light elements for which little is known about its nucleosynthetic origin and chemical evolution, given the lack of optical absorption lines in the spectra of long-lived FGK-type stars. We have identified a P I doublet in the near-ultraviolet (2135/2136 A) that is measurable in stars of low metallicity.
Heather R. Jacobson   +5 more
openaire   +5 more sources

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