Results 331 to 340 of about 128,151 (370)
Some of the next articles are maybe not open access.
Prebiotic Syntheses of Noncanonical Nucleosides and Nucleotides.
Chemical Reviews, 2020The origin of nucleotides is a major question in origins-of-life research. Given the central importance of RNA in biology and the influential RNA World hypothesis, a great deal of this research has focused on finding possible prebiotic syntheses of the ...
David M Fialho, Tyler P. Roche, N. Hud
semanticscholar +1 more source
Prebiotic Activation Processes
Nature, 1973Questions regarding the combination of amino acids and ribonucleotides to polypeptides and polynucleotides are investigated. Each of the reactions considered occurs in the solid state in plausible prebiotic conditions. Together they provide the basis for a unified scheme of amino acid and nucleotide activation. Urea, imidazole and Mg(++) are essential
R, Lohrmann, L E, Orgel
openaire +2 more sources
Current Opinion in Biotechnology, 2012
A wealth of information has been gathered over the past 15 years on prebiotics through experimental, animal and human studies, with the aim to understand the mechanism of actions and elucidate their beneficial health effects to the human host. Significant amount of evidence exists for their ability to increase the bioavailability of minerals and ...
Dimitris, Charalampopoulos +1 more
openaire +2 more sources
A wealth of information has been gathered over the past 15 years on prebiotics through experimental, animal and human studies, with the aim to understand the mechanism of actions and elucidate their beneficial health effects to the human host. Significant amount of evidence exists for their ability to increase the bioavailability of minerals and ...
Dimitris, Charalampopoulos +1 more
openaire +2 more sources
Prebiotic photosynthetic reactions
Biosystems, 1981Historically, numerous attempts have been made to mimic - by means of inorganic model reactions - the photosynthetic fixation of CO2 by green plants. The literature in this field is strewn with claims and counter-claims. Two factors have led us to reexamine this subject: firstly; doubts concerning the highly reducing model for the atmosphere of the ...
G J, Chittenden, A W, Schwartz
openaire +2 more sources
Journal of Clinical Gastroenterology, 2004
The intestinal flora of breast-fed infants is an important physiologic factor in the function of the gut and in the development of the immune system. The current research is part of a group of studies performed to answer the question whether a bovine milk formula supplemented with a prebiotic mixture from galactooligosaccharides and ...
Boehm G +7 more
openaire +3 more sources
The intestinal flora of breast-fed infants is an important physiologic factor in the function of the gut and in the development of the immune system. The current research is part of a group of studies performed to answer the question whether a bovine milk formula supplemented with a prebiotic mixture from galactooligosaccharides and ...
Boehm G +7 more
openaire +3 more sources
2017
Recent advancements in food science have resulted in the extraction and synthesis of novel dietary fibers or prebiotics. Subsequently, great interest has emerged in developing strategies to improve metabolic conditions like osteoporosis by modulating the intestinal microbiome with fiber.
Corrie M, Whisner, Connie M, Weaver
openaire +2 more sources
Recent advancements in food science have resulted in the extraction and synthesis of novel dietary fibers or prebiotics. Subsequently, great interest has emerged in developing strategies to improve metabolic conditions like osteoporosis by modulating the intestinal microbiome with fiber.
Corrie M, Whisner, Connie M, Weaver
openaire +2 more sources
Thermodynamics of Prebiotic Phosphorylation.
Chemical Reviews, 2019The formation of organophosphate molecules by prebiotic processes relies on nonenzymatic synthesis. Given the centrality of phosphorylated biomolecules in metabolic, structural, and replicative processes, it is highly likely that such nonenzymatic ...
M. Pasek
semanticscholar +1 more source
Origins of life and evolution of the biosphere, 2002
Cyanoacetylene is an earlier intermediate in a proposed prebiotic synthesis of cytosine, while cyanoacetaldehyde is a later intermediate. There is no scientific basis for the claim that cyanoacetaldehyde is more plausibly prebiotic than cyanoacetylene in this context.
openaire +2 more sources
Cyanoacetylene is an earlier intermediate in a proposed prebiotic synthesis of cytosine, while cyanoacetaldehyde is a later intermediate. There is no scientific basis for the claim that cyanoacetaldehyde is more plausibly prebiotic than cyanoacetylene in this context.
openaire +2 more sources
2021
Meteorites contain organic compounds that occur in all known life. These compounds, commonly referred to as prebiotic compounds, include α-amino acids and are most prevalent on carbonaceous chondrites. As carbonaceous chondrites are pristine samples from early in the solar system that have not had living organisms on them, we can study the chemistry ...
openaire +1 more source
Meteorites contain organic compounds that occur in all known life. These compounds, commonly referred to as prebiotic compounds, include α-amino acids and are most prevalent on carbonaceous chondrites. As carbonaceous chondrites are pristine samples from early in the solar system that have not had living organisms on them, we can study the chemistry ...
openaire +1 more source
Paotianxiong polysaccharides potential prebiotics: Structural analysis and prebiotic properties
Food ChemistryPaotianxiong (PTX) is a processing product of Aconitum carmichaelii Debx., often used as a tonic food daily. However, the structure and activity of the polysaccharide component that plays a major role still need to be determined. In our work, two new polysaccharides were purified from PTX and named PTXP-1 and PTXP-2.
Qinwen, Fu +7 more
openaire +2 more sources