<p style="margin-top: 0.1pt; margin-right: 0cm; margin-bottom: 0.1pt; text-align: right;"><a href="index.php?option=com_content&amp;view=article&amp;id=3881:poll-dk&amp;catid=619:topics-feedback&amp;lang=da-DK&amp;Itemid=2670"><span style="color: #ff0000;"><strong><span id="result_box" class="short_text" lang="da"><span class="hps">Venligst</span> <span class="hps">kommentere denne artikel</span></span></strong></span></a></p>
<p style="margin-top: 0.1pt; margin-right: 0cm; margin-bottom: 0.1pt; text-align: right;">&nbsp;</p>
<p><strong>B-vitaminerne er en gruppe på 8 vandopløselige vitaminer som har en vigtig rolle i celler-nes omsætning. De kan ikke produceres af kroppen selv, men kan blive dannet af bakterier i fordøjelseskanalen og af planter. Hos hesten er mikroberne i hestens tarm (hovedsaglig blind- og tyktarm) i stand til at syntetisere B-vitaminer og hestens behov for B-vitaminer er kun opgivet for tiamin (B1) og riboflavin (B2). I denne artikkel skal vi se på funktion, kilder og behov for tiamin (vitamin B1).</strong></p>
<p><img style="vertical-align: middle;" src="images-joomla/stories/seasons/ax.jpg" alt="ax" /> <img style="vertical-align: middle;" src="images-joomla/stories/seasons/tiaminformel.png" alt="tiaminformel" /><br /><strong>Funktion</strong><br />Tiamin er et vitamin som har en vigtig rolle i energi metabolismen. Det er nødvendig når karbohydrater, fedt og proteiner omsættes i kroppen for at produsere høj-energi forbindelsen ATP og for produktion af pentose sukkeret (ribulose) som er nødvendigt for produktion av nuk-leinsyrene DNA og RNA.</p>
<p><strong>Kilder</strong><br />Tiamin finnes i relativt høje koncentrationer i korn og biprodukter af korn (se tabell).</p>
<table style="border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 20.25pt;">
<td style="width: 94.9pt; border: 1pt solid windowtext; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="95">Majs</td>
<td style="width: 117.1pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="117">3.5 mg/kg TS</td>
</tr>
<tr style="height: 19.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="95">Havre</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="117">5.2 mg/kg TS</td>
</tr>
<tr style="height: 20.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="95">Hvede</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="117">5.5 &nbsp; mg/kg TS</td>
</tr>
<tr style="height: 19.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="95">Byg</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="117">5.7 mg/kg TS</td>
</tr>
<tr style="height: 20.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="95">Hvedeklid</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="117">8.0 mg/kg TS</td>
</tr>
<tr style="height: 20.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="95">Hvedekim</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.25pt;" valign="top" width="117">12.0 mg/kg TS</td>
</tr>
<tr style="height: 19.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="95">Risklid</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="117">23.0 mg/kg TS</td>
</tr>
<tr style="height: 19.25pt;">
<td style="width: 94.9pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="95">Ølgær</td>
<td style="width: 117.1pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 19.25pt;" valign="top" width="117">95.2 mg/kg TS</td>
</tr>
</tbody>
</table>
<p><br />TS=Tørstoff<br />Disse koncentrationer af tiamin i foderet vil blive reduceret ved lagring.<br />Tiamin er tilsat de fleste kraftfoderblandinger til hest (10-30 mg/kg) og i vitamintilskud.</p>
<p><strong>Behov</strong><br />NRC 2007 opgiver disse behov for tiamin til heste (se tabel).</p>
<table style="border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 20.45pt;">
<td style="width: 130.35pt; border: 1pt solid windowtext; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="130">Vedligehold</td>
<td style="width: 145.15pt; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: windowtext windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="145">0,06 mg/kg kropsvægt</td>
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<tr style="height: 21.5pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="130">Let træning</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="145">0,06 mg/kg kropsvægt</td>
</tr>
<tr style="height: 20.45pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="130">Middel træning</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="145">0,113 mg/kg kropsvægt</td>
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<tr style="height: 21.5pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="130">Hård træning</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="145">0,125 mg/kg kropsvægt</td>
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<tr style="height: 20.45pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="130">Meget hård træning</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="145">0,125 mg/kg kropsvægt</td>
</tr>
<tr style="height: 21.5pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="130">Drægtige hopper</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 21.5pt;" valign="top" width="145">0,06 mg/kg kropsvægt</td>
</tr>
<tr style="height: 20.45pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="130">Lakterende hopper</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="145">0,075 mg/kg kropsvægt</td>
</tr>
<tr style="height: 20.45pt;">
<td style="width: 130.35pt; border-width: medium 1pt 1pt; border-style: none solid solid; border-color: -moz-use-text-color windowtext windowtext; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="130">Ungheste</td>
<td style="width: 145.15pt; border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: -moz-use-text-color windowtext windowtext -moz-use-text-color; padding: 0cm 5.4pt; height: 20.45pt;" valign="top" width="145">0,075 mg/kg kropsvægt</td>
</tr>
</tbody>
</table>
<p><strong>Mangelsymptomer</strong><br />Beri-beri er den klassiske sygdom ved tiamin mangel. Blodmangel, langsom puls, ufrivillige muskelsammentrækninger og mangelfull koordination er blevet rapportert hos heste med tiamin mangel.<br />Giftighed<br />Tiamin er et vandopløseligt vitamin og et overskud vil blive udskidlt med urinen. Tiamin forgiftning er aldrig konstateret hos hester.</p>
<p><strong>PC-Horse</strong><br />PC-Horse beregner behovet for tiamin individuelt for hver hest i henhold til NRC anbefalingerne. Tiaminindholdet er også taget med for foderemnerne i programmets foderlister. Når du udregner foderplaner til dine heste ved hjelp av PC-Horse har du altid en oversigt over foderplanens ind-hold af tiamin og hvordan dette er i forhold til hestens behov.</p>
<p>&nbsp;</p>
<p style="margin-top: 0.1pt; margin-right: 0cm; margin-bottom: 0.1pt; text-align: right;"><a href="index.php?option=com_content&amp;view=article&amp;id=3881:poll-dk&amp;catid=619:topics-feedback&amp;lang=da-DK&amp;Itemid=2670"><span style="color: #ff0000;"><strong><span id="result_box" class="short_text" lang="da"><span class="hps">Venligst</span> <span class="hps">kommentere denne artikel</span></span></strong></span></a></p>
<p style="margin-top: 0.1pt; margin-right: 0cm; margin-bottom: 0.1pt;"><em>This article was originally written by Dr. Day Austbø.</em><br /> <em>Copyright: PC-Horse International - Norway 2015</em><br /> <em>Feel free to use and publish the material. Please indicate the source and author.</em></p>