منابع مشابه
Prebiotic Organic Microstructures as Model Protocells
A variety of prebiotic syntheses starting from reduced and gas precursors, or small reactive organic intermediates produce a variety of micron and sub-micron sized organic microstructures, including spheres, filaments and toroids. Many of these structures are hollow, and they display dynamic and reversible self-assembly. We report here some of their physical characteristics that might be compat...
متن کاملAtmospheric Prebiotic Chemistry and Organic Hazes
Earth's atmospheric composition at the time of the origin of life is not known, but it has often been suggested that chemical transformation of reactive species in the atmosphere was a significant source of prebiotic organic molecules. Experimental and theoretical studies over the past half century have shown that atmospheric synthesis can yield molecules such as amino acids and nucleobases, bu...
متن کاملMapping metabolism onto the prebiotic organic chemistry of hydrothermal vents.
Deep-sea hydrothermal vents provide a chemical interface between Earth’s reducing core and its oxidizing oceans. Today these environments support diverse chemosynthetic ecosystems (1), and after being discovered, they were soon proposed as the original site for the emergence of life (2). These hypotheses have considerable appeal but have not been universally accepted, partly because many aspect...
متن کاملEffect of Dietary Organic Zinc and Prebiotic on Productive Performance and Immune Response of Growing Quails
The aim of the present study was to investigate the possibility of improvingproductive performance and immunity of growing Japanese quailreared during summer in Egypt by supplementing the diets with organic zinc (Bioplex zinc) and prebiotic (mannan oligosaccharides). Diets were a basal diet or the basal diet supplemented with 20 mg Bioplex zinc (3.0 mg Zn) (Zn1), 40 mg Bioplex zinc (6.0 mg Zn) ...
متن کاملPrebiotic developments
P rebiotics have been defined recently more as a concept then a functional ingredient group: ‘The selective stimulation of growth and/or activity(ies) of one or a limited number of microbial genus(era)/ species in the gut microbiota that confer(s) health benefits to the host’. This definition has in common with earlier definitions that modulation of microbiota composition and/or activity is its...
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ژورنال
عنوان ژورنال: Origins of Life and Evolution of Biospheres
سال: 2012
ISSN: 0169-6149,1573-0875
DOI: 10.1007/s11084-012-9290-5