Arabinitol is the five-carbon sugar alcohol D-arabinitol (DA). It is a metabolite of the pathogenic Candida species, in vitro as well as in vivo, and can be determined by gas chromatography or enzymatic analysis. Endogenous DA and L-arabinitol (LA) are present in human body fluids. Serum DA and LA increase in renal dysfunction. In prospective clinical studies, elevated DA/LA or DA/creatine ratios in serum or urine have been found in immunocompromised, usually neutropenic, patients with invasive candidiasis. In addition, positive DA results have been obtained several days to weeks before positive blood cultures, and the normalization of DA levels has been correlated with therapeutic response in both humans and animals. Thus, arabinitol has been suggested a marker for invasive candidiasis. A non-invasive, non-culture-based method of determining urinary D-/L-arabinitol (D-/L-ARA) ratios was investigated as a tool for the diagnosis of invasive candidiasis in nosocomial paediatric infection cases in the clinical trial.

Urea nitrate is a powerful explosive. It has not found use as a legitimate explosive but is commonly used as an improvised explosive.

An acute attack may be precipitated by drugs affecting the liver, by infection and by diet. The discovery of porphobilinogen in urine is a critical value that can eliminate or reduce adverse effects from drugs or anesthetics.

N, N – Dimethylarginine, more known as asymmetric dimethylarginine (ADMA), a naturally occurring chemical found in blood plasma. It is formed by methylation of arginine residues in proteins and released after proteolysis. ADMA is an endogenous inhibitor of all isoforms of nitric oxide synthase, the enzyme that synthesizes nitric oxide from arginine. Elevated plasma concentrations of ADMA are associated with hypertension and other risk factors for cardiovascular disease. It is known, that chronic kidney disease (CDK) is associated with increased risk of renal and cardiovascular events and it has been claimed that asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA), are contributing factors. Nevertheless, the recent comprehensive analysis of methylarginines in a cohort of patients with non-dialysis CKD have revealed, the potential pathophysiological role of SDMA in CKD progression and atherosclerotic cardiovascular disease among non-dialysis CKD patients. Thus SDMA predicts CKD progression and future atherosclerotic cardiovascular events more consistently than other methylarginines. In addition, was also shown, that the maternal plasma ADMA concentration is an important indicator of fetal growth restriction in women with impaired placental perfusion independent of NO.

alpha-N-methyl-histamine is a metabolite of histamine that plays an important role in several (patho) physiological processes. alpha-N-methyl-histamine is being a potent agonist of histamine H3 receptor can be used as an effective therapeutic alternative in migraine patients.