Results 321 to 330 of about 79,324 (336)
Some of the next articles are maybe not open access.
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
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
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
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
Probiotics, prebiotics or `conbiotics'?
Trends in Microbiology, 1998Recent advances in genetic engineering promise the generation of modified probiotics to deliver specific health benefits[3xTannock, G.W. Trends Biotechnol. 1997; 15: 270–274Abstract | Full Text | Full Text PDF | PubMed | Scopus (118)See all References, 11xWagner, R.D. et al. Infect. Immun.
openaire +3 more sources