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Published in Anton Sebastian, A Dictionary of the History of Medicine, 2018
Thénard, Louis Jacques (1777–1857) French organic chemist from Louptiere and a contemporary of Joseph Louis Gay-Lussac (1778–1850). He did a scientific study of the composition of bile in 1803 and he used the word ‘picromel’ to denote the sweetish bitter substance in it. His discoveries include: Thenard blue for coloring porcelain, sodium and potassium peroxide, boron and silicon.
Nitroblue Tetrazolium Reduction
Published in Robert A. Greenwald, CRC Handbook of Methods for Oxygen Radical Research, 2018
Christian Auclair, Emmanuelle Voisin
The efficiency of O2−-mediated NBT reduction is strongly dependent on reaction conditions. Figure 3 shows the effect of pH on the extent of NBT reduction after the addition of potassium peroxide (K+, O2−) containing DMSO. In such a reaction, NBT reduction competes with the dismutation of O2− as follows:
Mycotic infections – mucormycosis and oral candidiasis associated with Covid-19: a significant and challenging association
Published in Journal of Oral Microbiology, 2021
Manjusha Nambiar, Sudhir Rama Varma, Mohamed Jaber, S. V. Sreelatha, Biju Thomas, Arathi S. Nair
The clinical presentation of pseudomembranous oral candidiasis is diagnostic because of the classic white appearance of the lesion [11]. Another relevant diagnostic feature of pseudomembranous candidiasis is that these white lesions can be wiped off by gentle scraping with gauze, leaving an underlying erythematous surface [12]. Other diagnostic methods include exfoliative cytology, potassium peroxide staining, imprint specimen for microbiology culture, culture analysis of oral swabs specimen, salivary assays, and oral mucosal biopsy. Periodic acid–Schiff staining is helpful to obtain definitive diagnosis [11]. In most of the reported cases of COVID-19, a thorough intra-oral examination and correlation with other underlying factors aids the clinician in arriving at the diagnosis of oral candidiasis.