Výsledky vyhledávání - "Albert P. Zens"

Improving the Mass-Limited Performance of Routine NMR Probes using Coupled Coils

Autor: Albert P. Zens, Victor Lim, Bob Taber, Brian Marsden

Publikováno v: Journal of Magnetic Resonance. 268:25-35

We report a method to convert, on demand, a general use dual-broadband probe to a high performance mass-limited probe for both high band and low band nuclei. This technology uses magnetic coupling of inductors to achieve this capability. The method o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd3c6e1126346485721ea298e33b0ae4
https://doi.org/10.1016/j.jmr.2016.03.007

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Using magnetic coupling to implement 1 H, 19 F, 13 C experiments in routine high resolution NMR probes

Autor: Paul Bowyer, Albert P. Zens, Jim Finnigan, Bob Taber, Brian Marsden

Publikováno v: Journal of Magnetic Resonance. 261:190-198

We report in this paper the design of (1)H, (19)F, (13)C circuitry using magnetic coupling which can do on demand experiments where one of the three nuclei is observed and the other two are decoupled. The implementation of this circuitry in routine N

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e1cb39cb367e2adebee9ab3ecfd527d
https://doi.org/10.1016/j.jmr.2015.10.010

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Using magnetic coupling to improve multiple resonance NMR probe circuits

Autor: Albert P. Zens

Publikováno v: Journal of Magnetic Resonance. 316:106741

Multiple resonant NMR circuits are an especially important aspect of modern NMR detectors. Today NMR researchers can carry out direct observe, indirect observe and double or triple resonance experiments on many different nuclides without having to ch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9415eecf7164d05406291b7e3b5b2cf0
https://doi.org/10.1016/j.jmr.2020.106741

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Circuit filling factor (CFF) for multiply tuned probes, revisited

Autor: Albert P. Zens, Mark S. Conradi

Publikováno v: Journal of magnetic resonance (San Diego, Calif. : 1997). 292

The concept of circuit filling factor (CFF) is re-examined for multi-tuned, multi-inductor probe circuits. The CFF is the fraction of magnetic stored energy residing in the NMR coil. The CFF theorem states that the CFF sums to unity across all the re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::142a47dbad75de737bad2af22995deac
https://pubmed.ncbi.nlm.nih.gov/29787983

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Using Magnetic Coupling to Improve the 1H/2H Double Tuned Circuit

Autor: Bob Taber, Albert P. Zens

Publikováno v: Journal of Magnetic Resonance. 259:114-120

We report in this paper an analysis of double-tuned (1)H/(2)H circuits that are capacitively or inductively matched to 50 Ω ports. In this analysis we use a novel new parameter called the circuit fill factor (CFF). It provides a means of characteriz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2aecbcc1f6aa324091a6d217f864212c
https://doi.org/10.1016/j.jmr.2015.07.011

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Measuring material susceptibility using NMR

Autor: Paul SanGiorgio, Albert P. Zens

Publikováno v: Journal of magnetic resonance (San Diego, Calif. : 1997). 255

We report on a method of measuring the high-field susceptibilities of paramagnetic and diamagnetic materials using only a standard NMR system equipped with pulsed field gradients. We demonstrate the accuracy and sensitivity of the technique by measur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe28d37cf04b5b68421740887c8ced1a
https://pubmed.ncbi.nlm.nih.gov/25909644

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A Comparison of Inverse-Detected Heteronuclear NMR Performance: Conventional vs Cryogenic Microprobe Performance

Autor: Atholl A. Gibson, and Albert P. Zens, David J. Russell, Gary E. Martin, Chad E. Hadden, James L. Carolan

Publikováno v: Journal of Natural Products. 63:1047-1049

We report a comparison of the results obtained at 500 MHz for heteronuclear shift correlation (HSQC) experiments with very small natural product samples using conventional and cryogenically cooled 3 mm NMR probes. The cryo probe affords a 12- to 16-f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ccc24d6516b3498383d0f39b772e5fa
https://doi.org/10.1021/np0003140

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