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Isolation and insecticidal activity of mellamide from Aspergillus melleus

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  1. Article

    Concentric tube vacuum chamber for high magnetic field, high-pressure ionization in a fourier transform ion cyclotron resonance mass spectrometer

    A new differential pum** design for external source Fourier transform ion cyclotron resonance mass spectrometry is described. A network of concentric tubes of increasing diameter terminates at a series of co...

    S. A. Hofstadler, E. Schmidt, Z. Guan in Journal of the American Society for Mass S… (1993)