There is evidence that
1-naphthol and 2-naphthol act as EDCs through thyroid hormone receptor antagonist activity (Sun et al.
1-naphthyl phosphatase,
1-naphthol, ethylenediaminetetraacetic acid, bovine serum albumin (BSA), nitro blue tetrazolium and Tween 20 were obtained from Sigma Chemical Co.
The retention times (RT) obtained for the control red dye 40, standard
1-naphthol, standard aniline and the studied samples are shown in tables 1 and 2.
Phenylphosphorodichloridate (PPDC), biphenylphosphorodichlondate, and naphthylphosphorodichloridate were prepared from phenol,
1-naphthol, and 4-phenylphenol, respectively, with phosphorusoxychloride using procedure reported elsewhere [41]
1-Naphthol and 2-naphthol, which can devolve from naphthalene, were moderately correlated (rho = 0.40 and 0.55 within the first and second prenatal samples, respectively; p < 0.01).Similarly, in NHANES, 2,4,6-TCP and TCPy (rho = 0.55) and 2,4-DCP and 2,5-DCP (rho = 0.53) were strongly correlated (p < 0.01).
4 and 5 show the response curves of 4 p nitro phenyl-azo-
1-naphthol solutions containing different dye concentrations as a change in the optical density (DA) at 625 nm and 472 nm respectively, against the absorbed dose [DA = Adeg-Ai], Where Adeg and Ai are optical densities before and after irradiation.
Human exposure to naphthalene is nearly universal; the recent National Health and Nutrition Examination Survey studies demonstrated detectable levels of
1-naphthol glucuronide in the urine of all 2,785 subjects tested (Li et al.
For example,
1-naphthol is a metabolite of both naphthalene (used as a moth repellent and also a polycyclic aromatic hydrocarbon from combustion processes) and carbaryl (Shealy et al.
Our results show that both inhalation exposure and smoking significantly contributed to urinary
1-naphthol levels.
Recently, the CDC reported measurable levels of urinary 3,5,6-trichloro-2-pyridinol (TCPY), a metabolite of chlorpyrifos and chlorpyrifosmethyl, and
1-naphthol (1N), a metabolite of carbatyl and naphthalene, in > 90% and 75% of males in the United States, respectively (CDC 2003).
Urinary
1-naphthol and 1-pyrenol as indicators of exposure to coal tar products.
Naphthalene ([greater than or equal to] 99%, scintillation grade), [[sup.2][H.sub.8]]naphthalene ([greater than or equal to] 98 atom% D),
1-naphthol ([greater than or equal to] 99%), 2-naphthol ([greater than or equal to] 99%), [[sup.2][H.sub.7]]
1-naphthol (97 atom% D), [[sup.2][H.sub.6]]benzene, and methanol (purge and trap grade) were obtained from Aldrich Chemical Co.