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Archive del 22 febbraio 2010

La composizione del veleno degli ofidici è molto varia, presentano un elevato tenore in proteine (circa il 90%) con attività enzimatica, molecole organiche non proteiche e sostanze inorganiche.

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  • Unusually elastic protein found by researchers; may have originated in cnidarian elastomer
    An unusually elastic protein has been discovered in one of the most ancient groups of animals, the over 600-million-year-old cnidarians. The protein is a part of the "weapons system" that the cnidarians use: a kind of harpoon launched from their body at extremely high speed. The discovery of the hitherto unknown protein in the freshwater polyp Hydr […]
  • Telomere extension turns back aging clock in cultured human cells, study finds
    A new procedure can quickly and efficiently increase the length of human telomeres, the protective caps on the ends of chromosomes that are linked to aging and disease, according to scientists.
  • Warming seas decrease sea turtle basking
    Green sea turtles may stop basking on beaches around the world within a century due to rising sea temperatures, a new study suggests. Basking helps the turtles regulate body temperature and may aid their immune system and digestion. By analyzing six years of turtle surveys and 24 years of satellite data, researchers have found the turtles bask more often whe […]
  • Bad reputation of crows demystified
    In literature, crows and ravens are a bad omen and are associated with witches. Most people believe they steal, eat other birds' eggs and reduce the populations of other birds. But a new study, which has brought together over 326 interactions between corvids and their prey, demonstrates that their notoriety is not entirely merited. The study analyzed th […]
  • Hidden infection shortens life in birds
    Mild infections without symptoms of illness can still lead to serious consequences by reducing the lifespan of the infected individuals, research shows. A new study has been carried out on malaria-infected migratory birds. The infection is thought to speed up the aging process by shortening the telomeres (i.e., the chromosomes ends) at a faster rate and ther […]
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