Comparison of Selected Chemical Properties of Fibres from Different Breeds of Dogs and German Blackface Sheep

Abstract

Combed or picked out dog hair fibre, as one of the protein fibres, could be used in yarn manufacturing. Dog hair fibres have a specific scale structure, shape and distribution on the surface. Results obtained indicated that same dog hair fibre fragmented and interrupted the continuous whole and continuous kemp medulla inside. Thus it is necessary to find differences between sheep wool and dog hair fibres as well as between different dog breeds in other areas. In this research, the crystal and chemical structures, macro-chain confirmation and surface morphology of sheep wool and dog hair fibres from different breeds were investigated through identifying variations between thus protein fibres. FTIR analysis showed that the absorbing peaks of sheep's wool around 2920 cm-1 and 2850 cm-1 are more intense and sharper than those in the IR spectrum of dog hair fibre. Other peaks of the dog hair spectra are more intensive and have a bigger areal. Values of the crystallinity degree and indexes are different not only between sheep wool and dog hair fibres, but also among hairs of the different dog breeds too. The percentage amounts of carbon, hydrogen and nitrogen in sheep wool and dog hair fibres are of the same order of magnitude. However, the content of elements in the cortex of sheep wool and dog hair fibres varies, especially that of sulphur and oxygen, which varies by about two times among the different protein fibres.

Comparative analysis of Rhipicephalus tick salivary gland and cement elementome

“…Dog hair fibers have been shown to contain C, H, O and N ( Ragaisiene et al., 2016 ), of which C and O were also identified here. However, in our study trace elements such as Se, Cu, Mn, Zn and Co present in mammalian cover hair ( BioCheck, 2014 ) were not identified in the tick SG and cement or in dog hair, thus suggesting that these elements are rare and with a low contribution to tick elementome.…”

Tick and Host Derived Compounds Detected in the Cement Complex Substance

“…Differences in the diversity and representation of chemical elements in R. microplus uninfected fed female ticks between previously reported results in the exoskeleton (C, O, and N elements with >5 atomic % and n = 10 elements with >0.2 atomic % in at least two samples) [45] and the results reported here in the cement cone (C, O, N, and S elements with >5 atomic % and n = 7 elements with >0.2 atomic % in at least two samples; Data S6) using the same methodological approach (SEM-EDS) suggested that these two complex substances are formed by different proteins and/or other components. Previous analyses of chemical composition identified the presence of N in canine fascia lata and hair fiber [56,57], thus suggesting that this tick cement element may have a host origin [58]. Trace elements such as Se, Cu, Mn, Zn, and Co present in mammalian cover hair [59] were not identified in the tick cement, thus suggesting a low contribution of the host to tick cement chemical composition.…”

Investigation of the Possibilities of Wool Fiber Surface Modification with Copper Selenide

“…X-ray diffraction patterns were measured in the 5 • -70 • 2θ angular interval. Complex diffraction patterns were obtained due to polycrystalline nature of the Cu x Se layer along with the high degree of crystallinity of the wool fiber [39,40]. Joint Committee on Powder Diffraction Standards (JCPDS) reference templates and data available in the literature [41] were used for the analysis of XRD results.…”

“…There are three peaks in spectrums of wool fibers at 1172, 1140 and 1078 cm −1 . Well-defined peaks at 1040 and 1172 cm −1 are assigned to the S=O stretching vibration originating from cysteic acid [ 40 ].…”