p-Phenylenediamine, the allergen of the year? Why now? Granted, p-phenylenediamine (PPD) has been the leading permanent hair coloring agent or oxidative hair dye in most of the Western world since ...

At six weeks of age, mice were treated with six daily intraperitoneal injections of streptozotocin (stz; Sigma), a dose of 55–65 mg/kg in citrate buffer (0.05 M; pH 4.5). Control mice received ...

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The mass spectrometer was operating in the positive ion mode with mass range of m/z 50-1000. The standard electrospray ion (ESI) source was used to generate the ions. The mass spectrum were acquired ...