Personal hair dye use and the risk of bladder cancer: a case-control study from The Netherlands. (49/68)

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Effect of ionic liquid on the determination of aromatic amines as contaminants in hair dyes by liquid chromatography coupled to electrochemical detection. (50/68)

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Contact dermatitis to hair dye: an update. (51/68)

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Paraphenylenediamine poisoning. (52/68)

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Pregnancy, maternal exposure to hair dyes and hair straightening cosmetics, and early age leukemia. (53/68)

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Hair cosmetics. (54/68)

The hair cosmetic industry has undergone a revolutionary change over the last two decades. The focus has dramatically veered from merely cleaning to repair, increasing the tensile strength, reducing oxidative damage, and stimulating growth. Newer shorter procedures to make hair look naturally more lustrous, smooth, and manageable have evolved. Specialized grooming products have been formulated to cleanse, calm, and condition the hair, and are tailored for different hair-types, for example, dry, dry-damaged, oily, colored, and gray hair. Other products are formulated to alter the color or structure of the hair shaft, for example, hair dyes, perming/relaxing. Hair sprays and waxes/gels, can alter the 'lift' of the hair-shaft. Although dermatologists are experts in managing scalp and hair diseases, the esthetic applications of newer cosmetic therapies still remain elusive. This article attempts to fill the lacunae in our knowledge of hair cosmetics and esthetic procedures relevant in today's rapidly changing beauty-enhancing industry, with special emphasis on the Indian scenario for chemical and 'natural' hair products.  (+info)

Lack of modifying effects of 2,2'-[(4-aminophenyl) imino] bisethanol sulfate on induction of preneoplastic gamma-glutamyl transpeptidase-positive foci in a medium-term bioassay system using F344 rats. (55/68)

The modifying effects of 2,2'-[(4-aminophenyl) imino] bisethanol sulfate (4APE) on liver carcinogenesis were investigated in male F344/DuCrj rats initially treated with N-nitrosodiethylamine (DEN). Two weeks after a single dose of DEN (200 mg/kg, intraperitoneally), rats were given 4APE at dietary levels of 1,000, 330 and 110 parts per million (ppm), or 3'-methyl-4-dimethylaminoazobenzene (3'-Me-DAB) at 600 ppm as a positive control for 6 weeks. At week 3 following DEN administration, all animals were subjected to partial hepatectomy. No adverse effects on survival and body weight were seen in rats treated with 4APE, even at the highest dietary levels. Marked growth retardation and significant increase of relative liver weight were found in animals treated with the known hepatocarcinogen 3'-Me-DAB, which demonstrated marked promoting activity as evidenced by significantly increased values for gamma-glutamyl transpeptidase (gamma-GT) positive foci as compared with the controls given DEN alone. In contrast, 4APE did not significantly increase the level of gamma-GT positive foci over that induced by DEN initiation alone. From these results, it is concluded that 4APE does not possess promoting activity for liver carcinogenesis.  (+info)

Hair dye use and risk of leukemia and lymphoma. (56/68)

Data from a population-based case-control study of incident leukemia and non-Hodgkin's lymphoma among adult men in Iowa and Minnesota were used to evaluate risk associated with hair dye use. The relative risk for ever using hair dyes was 1.8 (95% confidence interval [CI] = 1.1-2.7) among leukemia patients, and 2.0 (CI = 1.3-3.0) among cases with non-Hodgkin's lymphoma. There was a suggestion of increased risk with extent of hair dye use. Given the widespread use of hair coloring products, these observations deserve more detailed evaluation in populations where the exposure is relatively common.  (+info)