The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

As previously mentioned, gel electrophoresis involves an electrical field; in particular, this field is applied such that one end of the gel has a positive charge and the other end has a negative ...

This combination of properties is unexpected, since a strong negative charge would normally make it more difficult for a protein to store electrons, as they are likewise negatively charged, and ...

See, everything around us is made up of atoms which have a positively charged nucleus surrounded by negatively charged electrons. Normally, the positive and negative charges cancel out because ...

When two objects have the same static charge, they move away or repel one another. Rubbing a balloon on hair causes electrons to move from your hair onto the balloon, giving the balloon a negative ...

Soils are composed of a mixture of sand, silt, clay and organic matter. Both the clay and organic matter particles have a net negative charge. Thus, these negatively-charged soil particles will ...

Direct, cationic, basic or positive dyes: contain positively charged groups. Examples include methylene blue, basic fuchsin, and crystal violet. These dyes directly bind to and stain the negatively ...

A team of researchers at the Max Planck Institute for Medical Research made a striking discovery—a protein with contradictory properties: a strongly negative charge, yet a very high propensity ...