Results 311 to 320 of about 79,324 (336)
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Prebiotics and lipid metabolism
Current Opinion in Lipidology, 2002Prebiotics are defined as nondigestible food ingredients that beneficially affect the host by selectively stimulating the growth or the activity of one or a limited number of bacteria (bifidobacteria, lactobacilli) in the colon. Dietary fructans are nutritionally interesting oligosaccharides that strictly conform to the definition of prebiotics and (in
Nathalie M. Delzenne+1 more
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Prebiotic Synthesis on Minerals: Bridging the Prebiotic and RNA Worlds
The Biological Bulletin, 1999An array of experimental findings suggest that the simple molecules required for the origin of life may have been available on the primitive Earth. The well-known MillerUrey electric discharge experiment yields HCN, amino acids, and carboxylic acids (1). Carbonaceous meteorites contain over 70 amino acids, some heterocyclic compounds, including purines,
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2014
Most of our understanding of the human colonic microbiota is derived from studying the microbial contents of fecal samples, because it is impractical to access the human large intestine during normal digestion, and as an alternative, bacteria detected in feces are most representative of populations present in distal region of the intestine. The colonic
Helena M. R. T. Parracho+3 more
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Most of our understanding of the human colonic microbiota is derived from studying the microbial contents of fecal samples, because it is impractical to access the human large intestine during normal digestion, and as an alternative, bacteria detected in feces are most representative of populations present in distal region of the intestine. The colonic
Helena M. R. T. Parracho+3 more
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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 synthesis had to occur early in Earth's history.
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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, Leslie E. Orgel
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Astrobiology, 2001
Equilibrium adsorption isotherm data for the purine base adenine has been obtained on several prebiotically relevant minerals by frontal analysis using water as a mobile phase. Adenine is far displaced toward adsorption on pyrite (FeS2), quartz (SiO2), and pyrrhotite (FeS), but somewhat less for magnetite (Fe3O4) and forsterite (Mg2SiO4). The prebiotic
Corey A. Cohn+4 more
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Equilibrium adsorption isotherm data for the purine base adenine has been obtained on several prebiotically relevant minerals by frontal analysis using water as a mobile phase. Adenine is far displaced toward adsorption on pyrite (FeS2), quartz (SiO2), and pyrrhotite (FeS), but somewhat less for magnetite (Fe3O4) and forsterite (Mg2SiO4). The prebiotic
Corey A. Cohn+4 more
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Tolerance of Probiotics and Prebiotics
Journal of Clinical Gastroenterology, 2004The clinical efficacy of probiotics and prebiotics has been proved in several clinical settings. The authors review their proved or potential side effects. Probiotics as living microorganisms may theoretically be responsible for 4 types of side effects in susceptible individuals: infections, deleterious metabolic activities, excessive immune ...
Philippe Seksik, Philippe Marteau
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An overview of probiotics and prebiotics
Nursing Standard, 2007This article reviews the origins and background of probiotics. Evidence for the potential mechanisms of probiotics and prebiotics, and their interactions with the gastrointestinal tract and the immune system are discussed. Evidence is examined for the use of probiotics to treat infantile diarrhoea, irritable bowel syndrome, inflammatory bowel disease ...
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Panminerva medica, 2015
Obesity was probably rare in ancient times, with the current increase starting in the Industrial Revolution of the eighteenth century, and becoming much more widespread from about 1950, so concurrent with the increased consumption of carbohydrates from cereals in the Green Revolution.
Carnahan, Sharyn+3 more
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Obesity was probably rare in ancient times, with the current increase starting in the Industrial Revolution of the eighteenth century, and becoming much more widespread from about 1950, so concurrent with the increased consumption of carbohydrates from cereals in the Green Revolution.
Carnahan, Sharyn+3 more
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Struvite and Prebiotic Phosphorylation
Science, 1973Struvite, MgNH 4 PO 4 ⋅6H 2 O, rather than apatite or amorphous calcium phosphate is precipitated when phosphate is added to seawater containing more than 0.01 M NH 4 + ions.
G. J. Handschuh, Leslie E. Orgel
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