Document Detail


Elemental mapping in natural rubber latex films by electron energy loss spectroscopy associated with transmission electron microscopy.
MedLine Citation:
PMID:  12069235     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Element distribution maps from Hevea brasiliensis natural rubber latex thin films were obtained, by electron energy-loss spectroscopic imaging in a low-energy (80 kV) transmission electron microscope. C, N, O, P, Na, Ca, Mg, Al, Si, and S maps are presented for latex fractionated by centrifugation, either followed by dialysis or not. Most elements forming non-carbon compounds are concentrated in small, electron-dense spots surrounded by a carbon-rich matrix of polymer, thus showing that the rubber is filled with small particles compatible with the polyisoprene matrix. Ca distribution is unique, since it closely parallels the C distribution, evidencing an important role for -COO(-)-Ca2+-COO- ionic bridges in the structure of natural rubber.
Authors:
Márcia Maria Rippel; Carlos Alberto Paula Leite; Fernando Galembeck
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Analytical chemistry     Volume:  74     ISSN:  0003-2700     ISO Abbreviation:  Anal. Chem.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-18     Completed Date:  2002-07-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2541-6     Citation Subset:  IM    
Affiliation:
Instituto de Química, Universidade Estadual de Campinas, SP, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Dialysis
Elements
Latex / analysis*
Membranes, Artificial
Microscopy, Electron
Plants / chemistry*
Spectrometry, Mass, Electrospray Ionization
Chemical
Reg. No./Substance:
0/Elements; 0/Latex; 0/Membranes, Artificial

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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