Dictionary » N » Negative stain

Negative stain

negative stain

(Science: technique) stain forming an opaque or coloured background against which the object to be demonstrated appears as a translucent or colourless area; in electron microscopy, an electron opaque material, such as phosphotungstic acid or sodium phosphotungstate, is used to give detail as to surface structure.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


identify bacterias in Gram stain kit &The Giemsa Stain Kit

The Gram Stain Kit is intended for the demonstration and differentiation of Gram-positive and Gram-negative bacteria. Gram Positive Bacteria: Blue Gram Negative Bacteria: Red Other Tissue: Yellow Nuclei: Red The ...

See entire post
by scytek
Sat Mar 15, 2014 1:11 pm
 
Forum: General Discussion
Topic: identify bacterias in Gram stain kit &The Giemsa Stain Kit
Replies: 0
Views: 1271

Bacterial Taxonomy

... more such charts. I would particularly like a chart that relates Gram-staining to taxonomy, one that makes note of all the common exceptions. Maybe ... like? Deinococcus has an outer membrane similar to that of Gram-negatives, but it stains as Gram-positive, so it somehow retains the crystal ...

See entire post
by wildfunguy
Sat Oct 19, 2013 6:12 pm
 
Forum: Microbiology
Topic: Bacterial Taxonomy
Replies: 3
Views: 3968

Gram Positive Cocci

... far: Colony morphology: Yellow, round, slightly concave, smooth. Gram stain: Gram positive, appears to be cocci, but not perfectly round and tend ... mean that it ferments sucrose instead of lactose?) Nitrate Reduction: Negative (does not break down NO) Catalase: Positive Based on the first dichotomous ...

See entire post
by lucrezia03
Wed Oct 17, 2012 11:58 pm
 
Forum: Microbiology
Topic: Gram Positive Cocci
Replies: 2
Views: 3960

gram negative cocci. please help

You said you did an ACID FAST test to show you if it was GRAM NEGATIVE? Did you do a Gram stain at all? An acid-fast test doesn't tell you if it's Gram negative or Gram positive. Rather, ...

See entire post
by keetner
Mon Oct 08, 2012 12:23 am
 
Forum: Microbiology
Topic: gram negative cocci. please help
Replies: 8
Views: 9187

Unknown Organism

... help identifying my unknown by Monday. Here are the results. 1. Gram Stain Positive (Clustered Bacilli) 2. Capsule Negative 3. Endospore Negative* 4. Phenol Red Broth Fermentation with Acid and Gas end products ...

See entire post
by CheriPeace
Fri Jun 29, 2012 9:08 pm
 
Forum: Microbiology
Topic: Unknown Organism
Replies: 5
Views: 4722
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 5,396 times. 
What links here | Related changes | Permanent link