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Diagnosing Behcet's disease (BD) is challenging because of the lack of a diagnostic biomarker. The purposes of this study were to investigate distinctive metabolic changes in urine samples of BD patients and to identify urinary metabolic biomarkers for diagnosis of BD using gas chromatography/time-of-flight-mass spectrometry (GC/TOF-MS). Metabolomic profiling of urine samples from 44 BD patient...
Drug metabolism and pharmacokinetics (DMPK) studies require the identifi cation of drug metabolites usually by mass spectrometry (MS), and in later stages of drug development, confi rmation of metabolite structures by NMR. To achieve this, purifi cation of metabolites may be required. In this Application Note, purifi cation of bupropion drug metabolites was achieved using Agilent Automated Puri...
An ESI Q-TOF study to understand the impact of arginine on CID MS/MS characteristics of polypeptides
trescine are major polyamines in mammalian cells, and they play important roles in cell growth and differentiation. Although a variety of analytical methods for polyamines have been developed, there is still a need for a simpler, more sensitive and accurate method. The mass spectrometric method can simultaneously separate and identify polyamines on the basis of the difference of their mass with...
Alismatis Rhizoma (AMR) is a well-known natural medicine with a long history in Chinese medicine and has been commonly used for treating a wide range of ailments related to dysuria, edema, nephropathy, hyperlipidaemia, diabetes, inflammation as well as tumors in clinical applications. Most beneficial effects of AMR are attributed to the presence of protostane terpenoids, the major active ingred...
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