<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-19T10:58:08Z</responseDate><request verb="GetRecord" identifier="oai:dspace.mit.edu:1721.1/57874" metadataPrefix="dim">https://dspace.mit.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:dspace.mit.edu:1721.1/57874</identifier><datestamp>2022-01-13T07:54:33Z</datestamp><setSpec>com_1721.1_7582</setSpec><setSpec>com_1721.1_7581</setSpec><setSpec>col_1721.1_131024</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">Myron Spector.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Simson, Jacob A</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="other" lang="en_US">Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department">Massachusetts Institute of Technology. Department of Materials Science and Engineering</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2010-08-31T16:18:07Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="available">2010-08-31T16:18:07Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2008</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/1721.1/57874</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="oclc" lang="en_US">630057509</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Cataloged from PDF version of thesis.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (p. 27-28).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">In this study biomaterial scaffolds for regeneration of nucleus pulposus were developed by freeze drying slurries with different proportions of collagen II (CII), chondroitin-6-sulfate (CS), and hyaluronic acid (HA). The scaffolds were analyzed using biochemical assays to determine final composition. Chemically cross-linked scaffolds were analyzed to determine pore size and cross-link density. It was determined that every material type contained large enough pore size (275 gm) to seed nucleus pulposus cells and mesenchymal stem cells. The addition of CS to the scaffold increased pore size. It was also found that increasing levels of CS and HA resulted in lower cross-link density. These materials will be used next in In Vitro studies to determine their viability as regenerative tissue engineering constructs.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Jacob A. Simson.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">S.B.</dim:field>
   <dim:field mdschema="dc" element="format" qualifier="extent" lang="en_US">28 p.</dim:field>
   <dim:field mdschema="dc" element="language" qualifier="iso" lang="en_US">eng</dim:field>
   <dim:field mdschema="dc" element="publisher" lang="en_US">Massachusetts Institute of Technology</dim:field>
   <dim:field mdschema="dc" element="rights" lang="en_US">M.I.T. theses are protected by 
copyright. They may be viewed from this source for any purpose, but 
reproduction or distribution in any format is prohibited without written 
permission. See provided URL for inquiries about permission.</dim:field>
   <dim:field mdschema="dc" element="rights" qualifier="uri" lang="en_US">http://dspace.mit.edu/handle/1721.1/7582</dim:field>
   <dim:field mdschema="dc" element="subject" lang="en_US">Materials Science and Engineering.</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">Physical analysis of collagen-GAG composite scaffolds for nucleus pulposus tissue regeneration</dim:field>
   <dim:field mdschema="dc" element="type" lang="en_US">Thesis</dim:field>
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	&lt;Language>eng&lt;/Language>
   	&lt;Title>Physical analysis of collagen-GAG composite scaffolds for nucleus pulposus tissue regeneration&lt;/Title>
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   	&lt;PublicationDate>2008&lt;/PublicationDate>
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        	&lt;DisplayName>Simson, Jacob A&lt;/DisplayName>
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            &lt;DisplayName>Massachusetts Institute of Technology&lt;/DisplayName>
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    &lt;License>http://dspace.mit.edu/handle/1721.1/7582&lt;/License>
    &lt;Keyword>Materials Science and Engineering.&lt;/Keyword>
   	&lt;Abstract>In this study biomaterial scaffolds for regeneration of nucleus pulposus were developed by freeze drying slurries with different proportions of collagen II (CII), chondroitin-6-sulfate (CS), and hyaluronic acid (HA). The scaffolds were analyzed using biochemical assays to determine final composition. Chemically cross-linked scaffolds were analyzed to determine pore size and cross-link density. It was determined that every material type contained large enough pore size (275 gm) to seed nucleus pulposus cells and mesenchymal stem cells. The addition of CS to the scaffold increased pore size. It was also found that increasing levels of CS and HA resulted in lower cross-link density. These materials will be used next in In Vitro studies to determine their viability as regenerative tissue engineering constructs.&lt;/Abstract>
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