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Found Gram 7 times.

Displaying results 1 to 10.

1. Gram
A gram is the unit of measurement used to measure mass in the metric system. It is equal to the mass of one milliliter (one thousandth of a liter) of water at the temperature where water has the highest density (4C).

2. Gram stain
An important method for staining bacteria developed by Christian Gram in 1884. The bacteria are placed as a smear on a slide, then air-dried, then stained first with crystal violet dye and then with Gram's iodine, then washed with 95% ethanol, flooded with safranin or fuchsin (red dyes) and air-dried again. If the bacteria retain the purple-blue stain on their cell walls, they're classified as Gram-positive; if they don't retain the crystal violet but take the red counterstain, they're Gram-negative. This classification is important because the reaction to Gram stain correlates in many cases with the bacteria's vulnerability to certain antibiotic s. The process only takes a few minutes, making it ideal for medical clinics. If a clinician considers data from the Gram stain along with his/her medical examination of a sick patient, the clinician can get a pretty good idea of the pathogen that is infecting the patient and then start a regimen of antibiotics. In a clinical setting, the Gram stain is followed up by a bacterial culture (which takes three to six days to complete).

3. Gramicidins
Gramicidins are a group of polypeptide antibiotic s derived from the bacterial species Bacillus brevis.

4. Graminoids
Grasses (Family Gramineae or Poaceae) and grasslike plants such as sedge s (Family Cyperaceae) and rushes (Family Juncaceae).

5. Gramma (Gm.)
This Latin term, which is frequently used in medicine and pharmacy, means "gram".

6. Gram-negative
To describe a prokaryotic cell whose cell wall stains pink (negative) in Gram stain . The cell wall of a gram-negative bacterium contains relatively little peptidoglycan but contains an outer membrane composed of lipopolysaccharide (LPS), lipoprotein , and other complex macromolecule s.

7. Gram-positive
To describe a prokaryotic cell whose cell wall stains purple (positive) in Gram stain . The cell wall of a gram-positive bacterium consists chiefly of peptidoglycan and lacks the outer membrane of Gram-negative cells.

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