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	<id>https://actinobase.org/index.php?action=history&amp;feed=atom&amp;title=HV</id>
	<title>HV - Revision history</title>
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	<updated>2026-10-17T22:34:22Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.39.3</generator>
	<entry>
		<id>https://actinobase.org/index.php?title=HV&amp;diff=2369&amp;oldid=prev</id>
		<title>Matt Hutchings: /* Preparation */</title>
		<link rel="alternate" type="text/html" href="https://actinobase.org/index.php?title=HV&amp;diff=2369&amp;oldid=prev"/>
		<updated>2026-03-02T10:08:12Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Preparation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en-GB&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 10:08, 2 March 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l12&quot;&gt;Line 12:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 12:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*0.01g FeSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*0.01g FeSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*1mL VB stock solution (added after autoclaving)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*1mL VB stock solution (added after autoclaving)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;10g &lt;/del&gt;agar&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;20g &lt;/ins&gt;agar&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*1L dH&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;*1L dH&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l19&quot;&gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#Add 1ml VB stock solution, mix well and pour into sterile Petri dishes.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#Add 1ml VB stock solution, mix well and pour into sterile Petri dishes.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Uses==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Uses==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Matt Hutchings</name></author>
	</entry>
	<entry>
		<id>https://actinobase.org/index.php?title=HV&amp;diff=586&amp;oldid=prev</id>
		<title>MFeeney: Created page with &quot;=HV=    ==Preparation== Per Litre: *1g humic acid *1.7g KCl *0.5g Na&lt;sub&gt;2&lt;/sub&gt;HPO&lt;sub&gt;4&lt;/sub&gt; *0.5g MgSO&lt;sub&gt;4&lt;/sub&gt; *0.02g CaCO&lt;sub&gt;3&lt;/sub&gt; *0.01g FeSO&lt;sub&gt;4&lt;/sub&gt; *1mL VB...&quot;</title>
		<link rel="alternate" type="text/html" href="https://actinobase.org/index.php?title=HV&amp;diff=586&amp;oldid=prev"/>
		<updated>2019-07-26T14:27:18Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;=HV=    ==Preparation== Per Litre: *1g humic acid *1.7g KCl *0.5g Na&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;HPO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; *0.5g MgSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; *0.02g CaCO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; *0.01g FeSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; *1mL VB...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;=HV=&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Preparation==&lt;br /&gt;
Per Litre:&lt;br /&gt;
*1g humic acid&lt;br /&gt;
*1.7g KCl&lt;br /&gt;
*0.5g Na&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;HPO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;&lt;br /&gt;
*0.5g MgSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;&lt;br /&gt;
*0.02g CaCO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;&lt;br /&gt;
*0.01g FeSO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;&lt;br /&gt;
*1mL VB stock solution (added after autoclaving)&lt;br /&gt;
*10g agar&lt;br /&gt;
*1L dH&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O &lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Instructions&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
#Combine all components (except for the VB stock solution) and mix well. &lt;br /&gt;
#Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes. &lt;br /&gt;
#Add 1ml VB stock solution, mix well and pour into sterile Petri dishes.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Uses==&lt;br /&gt;
*[[Isolation experiments]]&lt;br /&gt;
&lt;br /&gt;
==Notes==&lt;br /&gt;
VB stock solution: 50mg VB1 (thiamine), VB2 (riboflavin), VB3 (niacin), VB6 (pyridoxine), B5 (D-calcium pantothenate), inositol and PABA (para amino acid), 25mg B7 (Biotin),and 100mL distilled water). &lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
Hayakawa and Nonomura (1987). Humic acid-vitamin agar, a new medium for the selective isolation of soil actinomycetes. Journal of Fermentation Technology 65(5): 501-509.&lt;/div&gt;</summary>
		<author><name>MFeeney</name></author>
	</entry>
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