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Title: Modified carbohydrate-chitosan compounds, methods of making the same and methods of using the same

Abstract

Compositions of matter are provided that include chitosan and a modified carbohydrate. The modified carbohydrate includes a carbohydrate component and a cross linking agent. The modified carbohydrate has increased carboxyl content as compared to an unmodified counterpart carbohydrate. A carboxyl group of the modified carbohydrate is covalently bonded with an amino group of chitosan. The compositions of matter provided herein may include cross linked starch citrate-chitosan and cross linked hemicellulose citrate-chitosan, including foams thereof. These compositions yield excellent absorbency and metal chelation properties. Methods of making cross linked modified carbohydrate-chitosan compounds are also provided.

Inventors:
; ; ;
Issue Date:
Research Org.:
North Carolina State University, Raleigh, NC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1172147
Patent Number(s):
8975387
Application Number:
13/052,463
Assignee:
North Carolina State University (Raleigh, NC)
Patent Classifications (CPCs):
A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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DOE Contract Number:  
FG36-02GO12026
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 Mar 21
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Venditti, Richard A, Pawlak, Joel J, Salam, Abdus, and El-Tahlawy, Khaled Fathy. Modified carbohydrate-chitosan compounds, methods of making the same and methods of using the same. United States: N. p., 2015. Web.
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Venditti, Richard A, Pawlak, Joel J, Salam, Abdus, & El-Tahlawy, Khaled Fathy. Modified carbohydrate-chitosan compounds, methods of making the same and methods of using the same. United States.
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Venditti, Richard A, Pawlak, Joel J, Salam, Abdus, and El-Tahlawy, Khaled Fathy. Tue . "Modified carbohydrate-chitosan compounds, methods of making the same and methods of using the same". United States. https://www.osti.gov/servlets/purl/1172147.
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@article{osti_1172147,
title = {Modified carbohydrate-chitosan compounds, methods of making the same and methods of using the same},
author = {Venditti, Richard A and Pawlak, Joel J and Salam, Abdus and El-Tahlawy, Khaled Fathy},
abstractNote = {Compositions of matter are provided that include chitosan and a modified carbohydrate. The modified carbohydrate includes a carbohydrate component and a cross linking agent. The modified carbohydrate has increased carboxyl content as compared to an unmodified counterpart carbohydrate. A carboxyl group of the modified carbohydrate is covalently bonded with an amino group of chitosan. The compositions of matter provided herein may include cross linked starch citrate-chitosan and cross linked hemicellulose citrate-chitosan, including foams thereof. These compositions yield excellent absorbency and metal chelation properties. Methods of making cross linked modified carbohydrate-chitosan compounds are also provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 10 00:00:00 EDT 2015},
month = {Tue Mar 10 00:00:00 EDT 2015}
}
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Works referenced in this record:

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font-size:0.75rem;"><br/> <span class="type">patent</span>, <span class="date" data-date="1994-02-15">February 1994</span></small> </h2> <ul id="references-list" class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Ahmed, Iqbal</span> </li> <li> US Patent Document 5,286,827</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5286827" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5286827<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5314420" target="_blank" rel="noopener noreferrer" class="name">Superabsorbent polymer having improved absorption rate and absorption under pressure<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">patent</span>, <span class="date" data-date="1994-05-24">May 1994</span></small> </h2> <ul id="references-list" class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Smith, Scott J.; Lind, Eric J.</span> </li> <li> US Patent Document 5,314,420</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5314420" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5314420<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5451613" target="_blank" rel="noopener noreferrer" class="name">Superabsorbent polymer having improved absorption rate and absorption under pressure<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; 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font-size:0.75rem;"><br/> <span class="type">patent</span>, <span class="date" data-date="2010-11-16">November 2010</span></small> </h2> <ul id="references-list" class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Weerawarna, S. 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Ananda</span> </li> <li> US Patent Document 7,959,762</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7959762" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7959762<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8163309" target="_blank" rel="noopener noreferrer" class="name">Starch foam microparticles<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">patent</span>, <span class="date" data-date="2012-04-24">April 2012</span></small> </h2> <ul id="references-list" class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Glenn, Gregory M.; Klamczynski, Artur</span> </li> <li> US Patent Document 8,163,309</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8163309" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8163309<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8545691" target="_blank" rel="noopener noreferrer" class="name">Aqueous medium management via super absorbent materials<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">patent</span>, <span class="date" data-date="2013-10-01">October 2013</span></small> </h2> <ul id="references-list" class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Teymour, Fouad; Al-Hallaj, Said</span> </li> <li> US Patent Document 8,545,691</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8545691" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8545691<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <ul class="pagination"></ul> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*" style="color: #3174AF;"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="journal"><span class="fa fa-angle-right"></span> journal<small class="text-muted"> (37)</small></a></li> <li class="small" style="margin-left:.75em; 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margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#557B2D;"> Kirsch, Wolff M.; Hudson, Samuel M.</span> </li> <li> US Patent Document 9,226,988</li> <li> <span class="text-muted related-url">URL: <a href="https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9226988" class="text-muted" target="_blank" rel="noopener noreferrer">https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9226988<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <ul class="pagination"></ul> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All Cited By</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-filter="type" data-pattern="patent"><span class="fa fa-angle-right"></span> patent<small class="text-muted"> (3)</small></a></li> </ul> <div style="margin-top:2em;"> <form class="pure-form small text-muted citation-search"><label for="cit-search" class="hidden">Cit Search</label> <fieldset> <input id="cit-search" class="search form-control pure-input-1" placeholder="Search" style="margin-bottom:10px;"> <legend></legend> <label for="cit-sort-name" class="d-block" style="margin-left:1em; 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Karra, Srinivasa Rao [Columbia, MO]; Berning, Douglas E [Columbia, MO]; <span class="author">...</span> <span class="text-muted pubdata"></span> </span> </div> <div class="abstract">A compound and method of making a compound for use as a diagnostic or therapeutic pharmaceutical comprises at least one functionalized hydroxyalkyl phosphine donor group and one or more sulfur or nitrogen donor and a metal combined with the ligand.</div><div class="small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link" style="background-color:#f9f9f9;" href="https://www.osti.gov/servlets/purl/872073" title="Link to document media" target="_blank" rel="noopener noreferrer" data-ostiid="872073" data-category="downloads" data-action="full text click via search pages" data-product-type="Patent" data-product-subtype="">Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="2" /><div class="item-info"> <h2 class="title" itemprop="name headline"> <a href="/doepatents/biblio/1987079" itemprop="url">Energetic compound embodiments and methods of making and using the same</a> </h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Patent</small><span class="authors"> Chavez, David; 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