<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>11094</id>
    <completedYear/>
    <publishedYear>1996</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>587</pageFirst>
    <pageLast>593</pageLast>
    <pageNumber/>
    <edition/>
    <issue>5</issue>
    <volume>20</volume>
    <type>article</type>
    <publisherName>Taylor &amp; Francis</publisherName>
    <publisherPlace>London</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Phase Behaviour of Copolymers Containing Cholesterol and 4,4' Methoxybiphenyl as Mesogenic Group</title>
    <parentTitle language="eng">Liquid crystals</parentTitle>
    <identifier type="old">12725</identifier>
    <identifier type="issn">0267-8292</identifier>
    <identifier type="issn">1366-5855</identifier>
    <enrichment key="date_peer_review">04.11.2005</enrichment>
    <author>Steffen Weidner</author>
    <author>D. Wolff</author>
    <author>J. Springer</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Weder Datei noch physisches Exemplar vorhanden ("No Access")</collection>
  </doc>
  <doc>
    <id>11098</id>
    <completedYear/>
    <publishedYear>2000</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>11</pageFirst>
    <pageLast>17</pageLast>
    <pageNumber/>
    <edition/>
    <issue>6</issue>
    <volume/>
    <type>article</type>
    <publisherName>IM Publications</publisherName>
    <publisherPlace>Chichester</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of Electric Field Strength and Emitter Temperature on Field Desorption Mass Spectra of Polyethylene Oligomers</title>
    <abstract language="eng">The influence of electric field strength and emitter temperature on dehydrogenation and CC cleavage in field desorption (FD) mass spectrometry of polyethylene (PE) oligomers of average molecular weights ranging from 500 to 2000 is examined. Low mass oligomers yield molecular weight (MW) distributions that are basically in accordance with results from gel-permeation chromatography. For these materials, dehydrogenation can be greatly reduced by reduction of the emitter potential. Furthermore, the influence of emitter potential on MW distributions indicates the occurrence of field-induced CC cleavages. Reliable MW distributions are more difficult to obtain from higher mass oligomers by FD-MS because of the need for higher field strength and higher emitter temperatures to effect their desorption/ionization. Experiments reveal that the application of FD-MS to PE oligomers is limited not only by field-induced but also by thermally-induced fragmentations. Even then, FD mass spectra contain valuable information on mass range and homogeneity of PE samples up to about m/z 3600.</abstract>
    <parentTitle language="eng">European journal of mass spectrometry</parentTitle>
    <identifier type="old">12729</identifier>
    <identifier type="doi">10.1255/ejms.300</identifier>
    <identifier type="issn">1469-0667</identifier>
    <identifier type="issn">1356-1049</identifier>
    <identifier type="issn">1365-0718</identifier>
    <enrichment key="date_peer_review">04.11.2005</enrichment>
    <author>J.H. Gross</author>
    <author>Steffen Weidner</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Weder Datei noch physisches Exemplar vorhanden ("No Access")</collection>
  </doc>
</export-example>
