Modified mass matrices and positivity preservation for hyperbolic and parabolic PDEs

β-Carboline alkaloids as matrices for UV

β-Carboline alkaloids as matrices for UV-matrix-assisted laser desorption/ionization time-of-flight mass spectrometry in positive and negative ion modes. Analysis of proteins of high molecular mass, and of cyclic and acyclic oligosaccharides

✍ Hiroshi Nonami; Koichi Tanaka; Yuko Fukuyama; Rosa Erra-Balsells 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 462 KB 👁 1 views

We report that commercially available b-carbolines (nor-harmane (9H-pyrido[3,4-b]indole), harmane (1methyl-9H-pyrido[3,4-b]indole), harmine (7-methoxy-1-methyl-9H-pyrido[3,4-b]indole), harmol (1-methyl-9H-pyrido[3,4-b]indol-7-ol), harmaline (3,4-dihydro-7-methoxy-1-methyl-9H-pyrido[3,4-b]indole) and