Structural changes in slenderized yak hair induced by heat–humidity conditions using Raman spectroscopy

In this study, estimation of structure was accomplished with the use of deconvolution, secondary derivation and curve-fitting. The structural changes of slenderized yak hair treated by heat–humidity conditions were quantified by analyzing the disulfide bond (S–S), amide I and amide III regions. The results showed that the amount of the disulphide bond in the yak hair decreases with the increase of treating time. The secondary structure of yak hair transforms from the α-helix and β pleated to the disordered conformation during the heat humidity processing.