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in 12 grams of carbon-12 (the most common isotope of carbon). The term gram-molecule was formerly used to mean one mole of molecules, and gram-atom for...

grams per mole). Some elements are usually encountered as molecules, e.g. hydrogen (H2), sulfur (S8), chlorine (Cl2). The molar mass of molecules of...

Gram-mole (more correctly Gram-molecule) is a synonym for Mole. See: Mole (unit) Molar mass This disambiguation page lists articles associated with the...

Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria...

Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial...

led to the definition of the Avogadro number as the number of molecules in one gram-molecule of oxygen. Perrin named the number to honor Avogadro for his...

atmospheric pressure, and are normally given in units of kilojoules per gram-molecule. A positive value indicates that heat is absorbed during the formation...

envelope of gram-negative bacteria, such as E. coli and Salmonella with a common structural architecture. Lipopolysaccharides (LPS) are large molecules consisting...

category of traditional Gram-negative antibacterial medications that inhibit protein synthesis and contain as a portion of the molecule an amino-modified glycoside...

example, the average mass of one molecule of water is about 18.0153 daltons, and of one mole of water is about 18.0153 grams. Also, the Avogadro number is...

bacterial cell walls, those of Gram-positive bacteria and those of Gram-negative bacteria, which are differentiated by their Gram staining characteristics....

temperatures. The mole was originally known as a gram-atom or a gram-molecule—the amount of a substance measured in grams divided by its atomic weight. Originally...

in and out of a cell, being selectively permeable to ions and organic molecules. In addition, cell membranes are involved in a variety of cellular processes...

for the Avogadro constant 6.02214×1023 mol−1 and for the volume of a gram-molecule under these conditions of 22.4146×106 mm3, the modern value is 2.687×1016...

force between molecules. In simple terms, the polarity (a state in which a molecule is oppositely charged on its poles) of water molecules allows them to...

the discovery of penicillin in 1928). Penicillin, or any other molecule, enters Gram-negative bacteria in a different manner. The bacteria have thinner...

initiate or inhibit transcription. Gram-negative bacteria produce N-acyl homoserine lactones (AHL) as their signaling molecule. Usually AHLs do not need additional...

of a signaling molecule, and the regulation of gene transcription in response. Quorum sensing operates in both gram-positive and gram-negative bacteria...

class of amphiphilic molecules, a big data analysis showed that amphipathicity best distinguished between AMPs with and without anti-gram-negative bacteria...

also the third most abundant molecule in the universe (behind molecular hydrogen and carbon monoxide). Water molecules form hydrogen bonds with each...