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Dextrose

Dextrose

(Science: chemistry) a sirupy, or white crystalline, variety of sugar, C6H12O6 (so called from turning the plane of polarization to the right), occurring in many ripe fruits. Dextrose and levulose are obtained by the inversion of cane sugar or sucrose, and hence called invert sugar. Dextrose is chiefly obtained by the action of heat and acids on starch, and hence called also starch sugar. It is also formed from starchy food by the action of the amylolytic ferments of saliva and pancreatic Juice.

The solid products are known to the trade as grape sugar; the sirupy products as glucose, or mixing sirup. These are harmless, but are only about half as sweet as cane or sucrose.

See: dexter.


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Fungus (yeast ?) - help to identify

Please, help me to identify this fungus. It is growth on Sabouraud dextrose agar and it is isolated from the ear of my cat. Thank you very much ! There are the images from my microscope : http://www.snimka.bg/album.php?album_id=401219

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by jimilota
Thu Jul 23, 2009 1:19 pm
 
Forum: Microbiology
Topic: Fungus (yeast ?) - help to identify
Replies: 3
Views: 167

help to identify unknown bacteria

... to add colonial and cellular morphology, motility observations. The "positive" results doesn't tell enough - for example, does "dextrose positive" mean growth or acid from assimilation or fermentation? Look in Bergey's.

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by JorgeLobo
Sat Nov 29, 2008 5:24 pm
 
Forum: Microbiology
Topic: help to identify unknown bacteria
Replies: 1
Views: 788

help to identify unknown bacteria

Ned help identifing this unknown. gram negative no endospores aerotolerant lipase positive protease positive lactose sucrose negative dextrose positive indole negatitve, methyl red positive vp negative citrate positive urease negative Nr negative zinc positive catalase negative cytochrome ...

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by Vosk
Sat Nov 29, 2008 3:32 pm
 
Forum: Microbiology
Topic: help to identify unknown bacteria
Replies: 1
Views: 788

Best general purpose media?

... slant. In my country, culture of bacteria usually uses Nutrient Agar (NA) or Nutrient Broth (NB). And for culture of mold, we usually use potato dextrose agar (PDA) Some people prefer to use branded PDA, but my lecturer prefer to make a potato extract by herself and then mixed with dextrose (or ...

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by victor
Fri Nov 14, 2008 2:03 pm
 
Forum: Microbiology
Topic: Best general purpose media?
Replies: 7
Views: 1731

Best general purpose media?

... a weird name for a medium. But anyway, sorry for the sidetracking. For yeast the richest medium I use is YPD(I think it stands for yeast peptone dextrose) medium. But don't really know much about it, I only use it to recover yeast after transformations, don't actually grow anything in it.

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by MrMistery
Wed Nov 12, 2008 12:17 am
 
Forum: Microbiology
Topic: Best general purpose media?
Replies: 7
Views: 1731
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