Spectrochemistry

He used a small aperture to define the beam of light, a lens to collimate it, a glass prism to disperse it, and a screen to display the resulting spectrum.

In 1800 William Hershel showed that the sun's radiation extended into infrared, and in 1801 John Wilhelm Ritter also made a similar observation in the ultraviolet.

however, the IR Spectrum proposed by Szu et al seems to be more promising in detecting breast cancer cells several months ahead of a mammogram.

Clinical tests have been carried out with approval of Institutional Review Board of National Taiwan University Hospital.

[8] This biosynthesis process is mainly consists of radical coupling reactions and it generates a particular lignin polymer in each plant species.

So due to having a complex structure, various molecular spectroscopic methods have been applied to resolve the aromatic units and different interunit linkages in lignin from distinct plant species.