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Radiation Safety

Biological Macromolecules – Proteins

By National Diagnostics | August 10, 2011 | Comments Off on Biological Macromolecules – Proteins

Proteins Like nucleic acids, proteins are polymers. While with nucleic acids the repeating unit is the nucleotide, with proteins, the analogous repeating unit is the amino acid. Amino acids consist of a central carbon that…

Biological Macromolecules: Nucleic Acids

By National Diagnostics | August 8, 2011 | Comments Off on Biological Macromolecules: Nucleic Acids

Nucleic Acids Like many biological molecules nucleic acids are polymers, long molecules formed of repeating units. With nucleic acids, the repeating unit is the nucleotide. A nucleotide consists of a five carbon sugar, a nitrogen…

Mechanism of Liquid Scintillation Counting

By National Diagnostics | July 22, 2011 | Comments Off on Mechanism of Liquid Scintillation Counting

By eliminating the combustion steps needed for gas phase analysis, the introduction of liquid scintillation counting (LSC) reduced the time required to analyze radioactive samples from hours to minutes. For low energy (“soft”) β emitters,…

Denaturing Protein Electrophoresis: SDS-PAGE

By National Diagnostics | July 21, 2011 | Comments Off on Denaturing Protein Electrophoresis: SDS-PAGE

In their native form, proteins fold into a variety of shapes, some compact, some elongated. The rate of migration of native proteins through a sieving medium is therefore more a reflection of their relative compactness,…