Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A polyamine compound, C7H19N3, found in ribosomes and living tissues and having various metabolic functions. It was originally isolated from semen.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry The
triamine N-(3-aminopropyl)butane-1,4-diamine, originally obtained fromsemen , that is involved in cellmetabolism .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Handa and Autar Mattoo, a research plant physiologist with the U.S. Department of Agriculture's Agricultural Research Service and collaborator in the research, had shown earlier that polyamines such as spermidine and spermine enhance nutritional and processing quality of tomato fruits.
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According to a researcher at Graz University, spermidine, a compound that is found in sperm, guards the cells in flies, worms, yeast, mice and even human blood against damage, thereby slowing the aging process.
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Worms treated with spermidine lived 15 per cent longer, while fruit flies given the compound outlasted their untreated counterparts by a margin of 30 per cent.
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The stench is from the breakdown of amino acids into amines, which include the evocatively named cadaverine, putrescine, and spermidine.
Boing Boing Mark Frauenfelder 2011
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The pelleted nuclei were re-suspended in 1 mL of homogenization buffer (10 mM Tris base; 80 mM KCl; 0.1 M EDTA; 10 mM spermidine; 10 mM spermine; 0.5 M sucrose; pH 9.3) and warmed to 45°C for 5 min.
PLoS ONE Alerts: New Articles Giang T. H. Vu et al. 2010
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Savithri Nambeesan, who was a graduate student in Handa's laboratory, introduced the yeast spermidine synthase gene, which led to increased production of spermidine in the tomatoes.
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Image 2: The tomato with increased spermidine (top) stays fresh longer than those that do not have an increased level of the natural organic compound.
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The organic compound spermidine is a polyamine and is found in all living cells.
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Adding spermidine suppressed various processes associated with ageing, as well as reducing free radicals and increasing lifespan.
Telegraph.co.uk: news business sport the Daily Telegraph newspaper Sunday Telegraph 2009
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Adding spermidine suppressed various processes associated with ageing, as well as reducing free radicals and increasing lifespan.
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