Independent studies in two laboratories have led to the development of chemical tests for the early diagnosis of pellagra. Melnick and associates (l-3) reported the excretion in urine of a compound which fails to react like nicotinic acid or amide with cyanogen bromide and aniline (Koenig reaction) unless previously subjected to alkaline hydrolysis. The physical and chemical similarity of the m...

Abstract Food authenticity is becoming increasingly important but challenges existing analytical methods. In this study, we analyze the mango cultivar Alphonso with regard to using 1 H-NMR spectroscopy. This has been termed “the king of mangoes” due its unique flavor. Regarding metabolites however, little known about constellations that allow for differentiation cultivar. We find distinguished ...

Edaphoclimatic conditions, planting altitudes, soil, the microbiome of plants and fruits, genotypes, postharvest processing are variables that contribute to chemical sensory quality coffee. Thus, objective this study was evaluate impacts altitude fermentation fruits on coffee using Nuclear Magnetic Resonance (NMR) Linear Discriminant Analysis (LDA). Cherry coffees were harvested in eight points...