نتایج جستجو برای: nmr spectrometer
تعداد نتایج: 79900 فیلتر نتایج به سال:
The field of zero- to ultralow-field (ZULF) nuclear magnetic resonance (NMR) is currently experiencing a rapid growth, owing the progress in optical magnetometry, and also attractive features ZULF NMR, such as low hardware cost excellent spectral resolution achieved under conditions. In this work, an approach proposed demonstrated for simultaneous acquisition ZULF-NMR spectra individual 13C-con...
A Dynamic Nuclear Polarisation (DNP) enhanced solid-state Magic Angle Spinning (MAS) NMR spectrometer operating at 6.7 T is described and demonstrated. The 187 GHz TE(13) fundamental mode of the FU CW VII gyrotron is used as the microwave source for this magnetic field strength and 284 MHz (1)H DNP-NMR. The spectrometer is designed for use with microwave frequencies up to 395 GHz (the TE(16) se...
A new fully digital and home-built NMR (Nuclear Magnetic Resonance) spectrometer working at verylow magnetic field (4.5 mT) is presented. This spectrometer was initially dedicated for the in situ measurement of the absolute polarization of hyperpolarized Xe. It allows detection and acquisition of NMR signals of proton (H) at 190 kHz and of hyperpolarized xenon-129 (HP Xe) at 50 kHz. In this new...
background celiac disease (cd) is a disorder associated with body reaction to gluten. after the gluten intake, an immune reaction against the protein occurs and damages villi of small intestine in celiac patients gradually. objectives the osc, a filtering method for minimization of inter- and intra-spectrometer variations that influence on data acquisition, was applied to biofluid nmr data of c...
Terahertz waves generated by vacuum electron devices have been successfully applied in dynamic nuclear polarization enhanced magnetic resonance (DNP-NMR) technology to significantly enhance the sensitivity of high-field NMR. To reduce field interference, high-power terahertz wave source and NMR spectrometer need be separated a few meters apart. Corrugated horns directional couplers are key comp...
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