Look up: zwitterion

1. 
   Zwitterion
   'Zwitter' is german for 'hybrid', and zwitterions are chemical species that manage to be both cations and anions at the same time. How can this come about? Consider ammonium acetate (NH4CH3COO). It is a perfectly ordinary salt, and when dissolved in water splits into its two constituent ions, NH4+ and CH3COO-. These ions will be able to approach quite close to each other in solution, but there will be no transfer of charge from one to another because of the 'shell' of water around each one. In f...
   Found on http://www.kcpc.usyd.edu.au/discovery/gl
   
   
2. 
   Zwitterion
   Zwitterion is an ion that has both a positive and a negative charge, such as an amino acid in neutral solution.
   Found on http://www.encyclo.co.uk/nol.php
   
   
3. 
   Zwitterion
   A particle that contains both positively charged and negatively charged groups. This results in a net charge of zero.Such as an amino acid in neutral solution.amino acids (NH₂-CHR-COOH) can form zwitterions (+NH₃-CHR-COO-)
   Found on http://www.diracdelta.co.uk/science/sour
   
   
4. 
   zwitterion
   A particle that contains both positively charged and negatively charged groups. For example, amino acids (NH₂-CHR-COOH) can form zwitterions (⁺NH₃-CHR-COO^-)
   Found on http://antoine.frostburg.edu/chem/senese
   
   
5. 
   Zwitterion
   An ion that has a positive and negative charge on the same group of atoms. It is also called dipolar ion.
   Found on http://www.chemicalglossary.net/definiti
   
   
6. 
   Zwitterion
   Natural state of free amino acids in which a-amino group is protonated giving a positive charge and a carboxyl group is deprotonated giving a negative charge.
   Found on
   
   
7. 
   zwitterion
   <chemistry> A zwitterion is a dipolar ion that is capable of carrying both a positive and negative charge simultaneously. ... The best example of this are amino acids which have a basic NH2 group and an acidic COOH group. What usually happens is that the H from the COOH group (carboxylic acid end) migrates to the NH2 group and this causes what ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. 
   Zwitterion
   A `zwitterion` (from German ``Zwitter`` — `hybrid,` `hermaphrodite`) is a chemical compound that is electrically neutral but carries formal positive and negative charges on different atoms. Zwitterions are polar and usually have a high solubility in water and a poor solubility in most organic solvents. `Ampholytes` are molecules that contain both acidic and basic groups (and are therefore amphoteric) and will exist as zwitterions at a cer...
   Found on http://en.wikipedia.org/wiki/Zwitterion
   
   
9. 
   zwitterion
   (tsvit´er-i″on) an ion that has both positive and negative regions of charge; called also dipolar ion.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
10. 
    zwitterion
    (from the article `liquid`) ...in physiology. Many molecules that occur in biological systems bear electric charges; a large molecule that has a positive electric charge at one ...
    Found on http://www.britannica.com/eb/a-z/z/12