Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2007-05-09
2008-11-11
Shrivastav, Brij B (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S318000
Reexamination Certificate
active
07449890
ABSTRACT:
Briefly, the present invention provides an apparatus and a method for performing a nuclear magnetic resonance (NMR) measurement on a sample solution containing small molecules and large molecules such as proteins, and provides an apparatus and a method for repeatedly performing the NMR measurement while stably controlling concentration conditions in a sample and changing a concentration of small molecules.A sample solution containing small molecules and large molecules is circularly transferred between a vessel equipped with a nuclear magnetic resonance probe and a control section in which injection and filtration of small molecules are performed. By transferring the sample solution between them, the NMR measurement can be performed while maintaining a concentration of large molecules to be constant and increasing or reducing a concentration of small molecules so that a concentration ratio of the small molecules relative to the large molecules is changed, the two types of molecules being present in the sample solution.
REFERENCES:
patent: 6319894 (2001-11-01), Tracey et al.
patent: 7157699 (2007-01-01), Ouyang et al.
patent: WO 01/23889 (2000-09-01), None
patent: WO 03/007009 (2003-01-01), None
Kitagawa Isao
Okada Michiya
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi , Ltd.
Reed Smith LLP
Shrivastav Brij B
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