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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Powdered hide model for vegetable tanning  [2014]

Brown, Eleanor M.; Latona, Renee J.; Taylor, Maryann M.; Gehring, Andrew G.;

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Powdered hide samples for this initial study of vegetable tanning were prepared from hides that were dehaired by a typical sulfide or oxidative process, and carried through the delime/bate step of a tanning process. In this study, we report on interactions of the vegetable tannin, quebracho with these powdered hide samples. Prior to tanning, the powdered hide from oxidative dehairing was on average slightly more susceptible to attack by collagenase than was the powdered hide from sulfide dehairing. After tanning with as little as 20% quebracho, powdered hide from both processes was well protected against collagenase degradation. Apparent shrinkage temperatures ranged between 79 deg C and 87 deg C, increasing with increased quebracho offer. In contrast to chrome tanning, shrinkage temperatures for quebracho treated oxidatively powdered hides were generally 2 deg C lower than for sulfide dehaired samples. Comparison of micrographs of powdered hide treated wih crude and purified quebracho suggest that the tanning effect of quebracho is partly a function of quebracho/collagen interactions, and also a function of the filling effect of other components of the crude quebracho.
From the journal
Journal of the American Leather Chemists Association
ISSN : 0002-9726

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
109
Issue:
1
Start Page:
8
End Page:
13
All titles:
"Powdered hide model for vegetable tanning"@eng
Other:
"Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted."
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
109
Issue:
1
Start Page:
8
End Page:
13
All titles:
"Powdered hide model for vegetable tanning"@eng
Other:
"Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted."