The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2009
Filed:
Nov. 29, 2005
Alun J Lucas, Hertfordshire, GB;
Robert Andrew Slade, Oxfordshire, GB;
Alun J Lucas, Hertfordshire, GB;
Robert Andrew Slade, Oxfordshire, GB;
Abstract
A method of carrying out DNP on a sample with a molecular structure containing at least two J-coupled non-integer spin nuclear species, the method comprising hyperpolarizing the sample in a cooled, solid form while it is exposed to a homogeneous magnetic field of suitable strength; dissolving or melting the hyperpolarized sample; subjecting the sample to a polarization holding RF pulse sequence while the sample is exposed to a suitably homogeneous magnetic field of sufficient strength to ensure the spin's chemical shift is greater than the J-coupling, the pulse sequence causing the nuclear spin populations in the sample to be re-distributed between a plurality of energy levels in a non-equilibrium manner; and then, following a time less than the T, relaxation time constant of the molecular species, causing the nuclear spin populations to transfer adiabatically to stable, equilibrium levels.