منابع مشابه
Frank J. Wethered
prize. Only the older practitioners can recall the furore of hope aroused by the announcement of Professor Koch's claims for his tuberculin, but Sir Douglas Powell was the one English physician to be accorded a small amount to bring back from his visit to Berlin. As Frank Wethered was then acting as his assistant he was charged with the carrying out .of the method, and so the writer was enabled...
متن کامل3. Dixon
NATURE | VOL 411 | 14 JUNE 2001 | www.nature.com 843 Collectively, plants produce a remarkably diverse array of over 100,000 low-molecular-mass natural products, also known as secondary metabolites. Secondary metabolites are distinct from the components of intermediary (primary) metabolism in that they are generally nonessential for the basic metabolic processes of the plant. Most are derived f...
متن کاملDixon Reconstruction
This approach is particularly important at lower field strengths, where it is the preferred method of lipid suppression. At 0.5T and below, chemically selective excitation or saturation is impractical since the small fat/water spectral shift would require a very long RF pulse. For example, the minimum time for a spectral-spatial pulse at 0.5T is about 24 ms. Inversion recovery methods become le...
متن کاملCS-Dixon: Compressed Sensing for Water-Fat Dixon Reconstruction
Introduction: Water-fat separation is of interest in several MRI applications including fat suppression and fat quantification. Chemical shift imaging allows robust water-fat separation [1, 2], however the acquisition of multiple images results in prolonged scan time. Accelerated water-fat separation using compressed sensing (CS) was partly addressed in [3] by considering the separation as a sp...
متن کاملHybrid Dixon Resultants
Dixon 1908] describes three distinct homogeneous determinant representations for the resultant of three bivariate polynomials of bidegree (m; n). These Dixon resultants are the determinants of matrices of orders 6mn, 3mn and 2mn, and the entries of these matrices are respectively homogeneous of degrees 1, 2, and 3 in the coeecients of the original three polynomial equations. Here we mix and mat...
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ژورنال
عنوان ژورنال: Nature Immunology
سال: 2008
ISSN: 1529-2908,1529-2916
DOI: 10.1038/ni0408-333