Results 1 to 10 of about 1,651,814 (168)

Modelling the Chemical Evolution [PDF]

Proceedings 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   +4 more sources

CHEMICAL EVOLUTION IN VeLLOs [PDF]

Journal of The Korean Astronomical Society, 2007
A new type of object called "Very Low Luminosity Objects (VeLLOs)" has been discovered by the Spitzer Space Telescope. VeLLOs might be substellar objects forming by accretion. However, some VeLLOs are associated with strong outflows, indicating the previous existence of massive accretion.
Lee, Jeong-Eun
openaire   +5 more sources

Cosmic Chemical Evolution [PDF]

The Astrophysical Journal, 1999
ApJ(Letters) in press, 15 latex pages and 4 ...
Cen, Renyue, Ostriker, Jeremiah P.
openaire   +4 more sources

Differential Oligomerization of Alpha versus Beta Amino Acids and Hydroxy Acids in Abiotic Proto-Peptide Synthesis Reactions

Life, 2022
The origin of biopolymers is a central question in origins of life research. In extant life, proteins are coded linear polymers made of a fixed set of twenty alpha-L-amino acids.
Moran Frenkel-Pinter, Kaitlin C. Jacobson, Jonathan Eskew-Martin, Jay G. Forsythe, Martha A. Grover, Loren Dean Williams, Nicholas V. Hud   +6 more
doaj   +1 more source

Feeding Our Microbiota: Stimulation of the Immune/Semiochemical System and the Potential Amelioration of Non-Communicable Diseases

Life, 2022
Non-communicable diseases are those conditions to which causative infectious agents cannot readily be assigned. It is increasingly likely that at least some of these conditions are due to the breakdown of the previously mutualistic intestinal microbiota ...
David Smith, Sohan Jheeta, Hannya V. Fuentes, Miryam Palacios-Pérez   +3 more
doaj   +1 more source

Microbiome–Gut Dissociation in the Neonate: Autism-Related Developmental Brain Disease and the Origin of the Placebo Effect

Gastrointestinal Disorders, 2022
While the importance of the intestinal microbiome has been realised for a number of years, the significance of the phrase microbiota–gut–brain axis is only just beginning to be fully appreciated.
David Smith, Sohan Jheeta, Hannya V. Fuentes, Bernadette Street, Miryam Palacios-Pérez   +4 more
doaj   +1 more source

Microbiome–Gut Dissociation in the Neonate: Obesity and Coeliac Disease as Examples of Microbiome Function Deficiency Disorder

Gastrointestinal Disorders, 2022
The purpose of this article is to provide a direction for translational research based on an analysis of the nature of complex, immune-related conditions such as obesity and coeliac disease.
David Smith, Miryam Palacios-Pérez, Sohan Jheeta   +2 more
doaj   +1 more source

Thioesters provide a plausible prebiotic path to proto-peptides

Nature 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, Marcos Bouza, Facundo M. Fernández, Luke J. Leman, Loren Dean Williams, Nicholas V. Hud, Aikomari Guzman-Martinez   +6 more
doaj   +1 more source

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

Life, 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, Miryam Palacios-Pérez, Sohan Jheeta   +2 more
doaj   +1 more source

Microbiome–Gut Dissociation: Investigating the Origins of Obesity

Gastrointestinal 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