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Circular Dichroism - a description





Circular Dichroism, often abbreviated to "CD", is displayed when an optically active substance absorbs left or right handed circularly polarized light preferentially. The difference in left and right handed absorbance A(l)- A(r) is often very small. CD signal varies with wavelength and our current models J-1500 CD spectrometer is capable of measuring over a wavelength range of 163 nm to 1600 nm. The J-1100 with a wavelength range of 180-600nm is ideally suited for collecting CD spectra of peptides, proteins and nucleic acids and provides valuable information about the secondary structure of biological macromolecules.



Circular Dichroism