Definitions for prebiotic
This page provides all possible meanings and translations of the word prebiotic
occurring before the advent of life
non digestible but beneficial
Prebiotics are non-digestible food ingredients that stimulate the growth and/or activity of bacteria in the digestive system in ways claimed to be beneficial to health. They were first identified and named by Marcel Roberfroid in 1995. As a functional food component, prebiotics, like probiotics, are conceptually intermediate between foods and drugs. Depending on the jurisdiction, they typically receive an intermediate level of regulatory scrutiny, in particular of the health claims made concerning them. Roberfroid offered a refined definition in the 2007 Journal of Nutrition stating: A prebiotic is a selectively fermented ingredient that allows specific changes, both in the composition and/or activity in the gastrointestinal microflora that confers benefits upon host well-being and health" Additionally, in his 2007 revisit of Prebiotics, Roberfroid stated that only two particular prebiotics then fully met this definition: trans-galactooligosaccharide and inulin. Other authorities also classify fructooligosaccharide and lactulose as prebiotics. Mannan Oligosaccharides have been termed as prebiotics but would more correctly be termed immunosaccharides Researchers now also focus on the distinction between short-chain, long-chain, and full-spectrum prebiotics. "Short-chain" prebiotics, e.g. oligofructose, contain 2-8 links per saccharide molecule and are typically fermented more quickly in the right-side of the colon providing nourishment to the bacteria in that area. Longer-chain prebiotics, e.g. inulin, contain 9-64 links per saccharide molecule, and tend to be fermented more slowly, nourishing bacteria predominantly in the left-side colon. Full-spectrum prebiotics provide the full range of molecular link-lengths from 2-64 links per molecule, and nourish bacteria throughout the colon, e.g. Oligofructose-Enriched Inulin. The majority of research done on prebiotics is based on full-spectrum prebiotics, typically using OEI as the research substance.
Sample Sentences & Example Usage
The existence of such complex molecules in a comet, a relic of Solar System, imply that chemical processes at work during that time could have played a key role in fostering the formation of prebiotic material.
Mercury's polar regions thus serve as a witness plate to the delivery to the inner solar system of water and organic compounds from the outer solar system — a process that, much earlier, may have led to prebiotic chemical synthesis and the origin of life on Earth.
I don't think that there are many people who are trying to detect life in meteorites. Most of us are trying to detect prebiotic organics in meteorites — that is, molecules that may have played a role in helping life get started on Earth. While there are some folks that think they've detected signs of extinct life in meteorites, I have not so far found their arguments to be very compelling.
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