Results 341 to 350 of about 73,384 (360)
Some of the next articles are maybe not open access.
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 ...
openaire +3 more sources
Probiotics, Prebiotics, and Synbiotics
2008According to the German definition, probiotics are defined viable microorganisms, sufficient amounts of which reach the intestine in an active state and thus exert positive health effects. Numerous probiotic microorganisms (e.g. Lactobacillus rhamnosus GG, L. reuteri, bifidobacteria and certain strains of L. casei or the L.
Michael de Vrese, Jürgen Schrezenmeir
openaire +4 more sources
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
openaire +1 more source
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
openaire +1 more source
Prebiotic Synthesis of Methionine
Science, 1972Methionine has been shown to be a product of the action of a spark discharge on a simulated primitive earth atmosphere containing CH 4 , N 2 , NH 3 , H 2 O, and H 2 S or CH 3 SH.
Stanley L. Miller, James E. Van Trump
openaire +3 more sources
The prebiotic chemistry of nucleotides
Origins of Life, 1984Diiminosuccinonitrile (DISN), formed by the oxidation of diaminomaleonitrile (DAMN), has been investigated as a potential prebiotic phosphorylating agent. DISN effects the cyclization of 3'-adenosine monophosphate to adenosine 2', 3'-cyclic phosphate in up to 39% yield. The mechanism of this reaction was investigated.
William J. Hagan +2 more
openaire +3 more sources
The evolution of the prebiotic atmosphere
Origins of Life, 1984One-dimensional radiative convective and photochemical models are used to estimate the vertical temperature structure and composition of the earth's prebiotic atmosphere. Greatly enhanced CO2 levels (100-1000 times present) are required to keep the mean surface temperature above freezing in the face of decreased solar luminosity during the earth's ...
openaire +3 more sources
Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life, 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 +3 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 +3 more sources
2006
Based on modern geochemistry's view of the atmospheric and geological conditions on the primordial Earth ∼3.8–4 billion years ago, the most realistic scenario for the formation of amino acids and peptides in chemical evolution is discussed, including possible reasons for sequence preferences in early proteins and for biohomochirality.
Bernd M. Rode, Kristof Plankensteiner
openaire +3 more sources
Based on modern geochemistry's view of the atmospheric and geological conditions on the primordial Earth ∼3.8–4 billion years ago, the most realistic scenario for the formation of amino acids and peptides in chemical evolution is discussed, including possible reasons for sequence preferences in early proteins and for biohomochirality.
Bernd M. Rode, Kristof Plankensteiner
openaire +3 more sources
2014
Dietary fiber and prebiotics exert a great impact on health-promoting food for mankind. Under this aspect a general overview is given about the bioavailability of carbohydrates and their influence on dietary fiber intake and about the developing of the prebiotic concept and specific functional foods. Moreover, the occurrence and chemical composition of
Renate Loeppert +4 more
openaire +2 more sources
Dietary fiber and prebiotics exert a great impact on health-promoting food for mankind. Under this aspect a general overview is given about the bioavailability of carbohydrates and their influence on dietary fiber intake and about the developing of the prebiotic concept and specific functional foods. Moreover, the occurrence and chemical composition of
Renate Loeppert +4 more
openaire +2 more sources