Multi-elemental exposure assessment through concentrations in hair of free-ranging capybaras (Hydrochoerus hydrochaeris Linnaeus, 1766) in the Atlantic Forest remnants, Northeast of Brazil

Quantification of Some Heavy Metals in Hair of Dairy Cows Housed in Different Areas from Sicily as a Bioindicator of Environmental Exposure—A Preliminary Study

“…The Cd values measured in the hair sampled from cows enrolled in the present study were lower than those found by other authors in cow hair [8,11,12,21]. As well, the mean Cd contents (0.86 mg/kg and 0.27 mg/kg) obtained by Yang et al [15] and Rezza et al [18] in female free-ranging capybaras and men's hair, respectively, were much higher than those achieved in the current study.…”

“…The high Al content found in group 4 was maybe due to the closeness of the farm to the industrial area, located southwest and at a lower altitude than where there are companies where Al is processed. As well, the mean Al contents (1048 mg/kg) in female free-ranging capybara hair obtained by Yang et al [15] were much higher to those achieved in our study.…”

“…A lower Fe concentration was found in all groups, except groups 2 and 4, compared to values previously reported in cow hair [11,12]. Yang et al [15] found higher Fe content (476-51180 mg/kg) in female free-ranging capybara hair with respect to the values measured in all groups of cows enrolled in the present study. Salih and Aziz [2] detected a concentration of Fe in the scalp hair of workers in a steel factory in Iraq of 128.32 mg/kg, which was similar to the values detected in the current study for groups 2 and 4, while in an unpolluted rural site it was 50.98 mg/kg, which was similar to group 5 but higher respect to the remaining groups.…”

“…Unlike other clinical samples, hair is inert and chemically homogeneous [ 9 ]. Bioelements are built into the hair structure and in the root during its growth and are metabolically very active thanks to the presence of the sulfhydryl group –SH of cysteine capable of chelation [ 9 , 12 , 13 , 14 , 15 , 16 , 17 ]. The main advantage of hair as a biological matrix is it contains information about metabolic pools of toxic elements in animals [ 11 ].…”

Clay Nanotube Immobilization on Animal Hair for Sustained Anti-Lice Protection

“…The typical photographs of the appearance of capybara and guinea pig and their hair are shown in Figure 1. Capybara hair contains wax and has been used recently as a bioindicator to investigate the metals distribution in ecotoxicological studies [16]. Figure 1.…”