Vanishing da Vinci: New nondestructive way to gauge degradation of ancient paper art and docs the team developed an approach to nondestructively identify and quantify the concentration of light-absorbing molecules known as chromophores <http://phys.org/tags/chromophores/> in ancient paper, the culprit behind the "yellowing" of the cellulose within ancient documents and works of art. "During the centuries, the combined actions of light, heat, moisture, metallic and acidic impurities, and pollutant gases modify the white color of ancient paper's main component: cellulose," explained Joanna Łojewska, a professor in the Department of Chemistry at Jagiellonian University in Krakow, Poland. "This phenomenon is known as 'yellowing,' which causes severe damage and negatively affects the aesthetic enjoyment of ancient art works on paper." http://bit.ly/1mXwV1D Source: http://phys.org/news/2014-06-da-vinci-nondestructive-gauge-degradation.html See if people are clicking on this link: http://bit.ly/1mXwV1D+ Try the bitly.com sidebar to see who is talking about a page on the web: https://bitly.com/pages/sidebar -- Peter Kurilecz CRM CA IGP [log in to unmask] Dallas, Texas Save our in-boxes! http://emailcharter.org http://twitter.com/RAINbyte http://tech.groups.yahoo.com/group/RAINbyte/ http://paper.li/RAINbyte/rainbyte http://pinterest.com/pakurilecz/archives/ http://pinterest.com/pakurilecz/records-management/ http://www.linkedin.com/in/peterakurilecz Information not relevant for my reply has been deleted to reduce the electronic footprint and to save the sanity of digest subscribers List archives at http://lists.ufl.edu/archives/recmgmt-l.html Contact [log in to unmask] for assistance To unsubscribe from this list, click the below link. If not already present, place UNSUBSCRIBE RECMGMT-L or UNSUB RECMGMT-L in the body of the message. mailto:[log in to unmask]
