Results 281 to 290 of about 65,055 (332)

Pulsed nuclear magnetic resonance study of39K within Halobacteria

The Journal of Membrane Biology, 1977
The 39K contents of isolated pellets and supernatant solutions from suspensions of Halobacterium halobium were studied at 21-22 degrees C by pulsed NMR spectroscopy. The rates of transverse relaxation were measured directly from the free induction decay (FID). The rate of longitudinal relaxation was measured by studying the FID after pairs of pulses of
M, Shporer, M M, Civan
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Pulsed nuclear magnetic resonance magnetometer

Optoelectronics, Instrumentation and Data Processing, 2015
A precision magnetometer based on pulsed nuclear magnetic resonance (NMR) is described. This magnetometer measures constant magnetic fields with an absolute error not more than 10−6 and a resolution of up to 10−7. The use of modern digital technologies, such as FPGA, made it possible to significantly accelerate and optimize NMR signals.
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Inexpensive Pulsed Nuclear Magnetic Resonance Spectrometer

American Journal of Physics, 1971
A compact and inexpensive fixed frequency pulsed nuclear magnetic resonance spectrometer is described. The apparatus is entirely self-contained and all units are bench made.
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Pulsed Nuclear Magnetic Resonance in Rotating Solids

Physical Review, 1967
Pulsed nuclear-magnetic-resonance measurements have been made on rapidly rotating solid samples. Transient induction signals were observed for ${\mathrm{P}}^{31}$ and ${\mathrm{Al}}^{27}$ nuclei in ${\mathrm{Mg}}_{3}$${\mathrm{P}}_{2}$, ${\mathrm{Zn}}_{3}$${\mathrm{P}}_{2}$, and AlP powders.
H. Kessemeier, R. E. Norberg
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Acoustic ringing effects in pulsed nuclear magnetic resonance probes

Review of Scientific Instruments, 1978
The troublesome spurious ringing phenomenon found in pulsed nuclear magnetic resonance probes is explained in terms of the electromagnetic generation and detection of ultrasonic waves. A few techniques for eliminating this problem are discussed.
M L, Buess, G L, Petersen
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Simple Bridge for Pulsed Nuclear Magnetic Resonance

Review of Scientific Instruments, 1967
An asymmetrical rf bridge for pulsed magnetic resonance experiments is described. The balancing adjustments, which can be made quickly and easily, ensure a proper impedance match to transmitter and receiver. The bridge is particularly well suited for pure nuclear quadrupole resonance experiments.
K. R. Jeffrey, R. L. Armstrong
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Transition-Selective Pulses in Zero-Field Nuclear Magnetic Resonance

The Journal of Physical Chemistry A, 2016
We use low-amplitude, ultralow frequency pulses to drive nuclear spin transitions in zero and ultralow magnetic fields. In analogy to high-field NMR, a range of sophisticated experiments becomes available as these allow narrow-band excitation. As a first demonstration, pulses with excitation bandwidths 0.5-5 Hz are used for population redistribution ...
Tobias F. Sjolander, Michael C. D. Tayler, Jonathan P. King, Dmitry Budker, Alexander Pines   +4 more
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Pulsed nuclear magnetic resonance signals in magnetically ordered materials

Journal of Applied Spectroscopy, 2008
We have obtained an analytical expression for nuclear precession and nuclear echo signals generated in magnetically ordered materials upon resonant excitation of the nuclear subsystem by two pulses of identical amplitude but different durations. We show that in a nuclear subsystem with inhomogeneous broadening of the spectroscopic transition and an ...
V. S. Kuz’min, V. M. Kolesenko, E. P. Borbotko   +2 more
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Pulse Fourier Transform Nuclear Magnetic Resonance Spectroscopy

Applied Spectroscopy, 1972
Recent advances in NMR spectroscopy allow one to study extremely dilute systems or nuclei which occur in low natural abundance and/or have poor sensitivity for NMR detection. This paper describes various pulse and pulse Fourier transform NMR techniques.
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A versatile pulse programmer for pulse nuclear magnetic resonance spectroscopy

Journal of Physics E: Scientific Instruments, 1972
A digital pulse programmer producing the standard pulse sequences required for pulse nuclear magnetic resonance spectroscopy is described. In addition, a 'saturation burst' sequence, useful in the measurement of long relaxation times in solids, is provided.
C E Tarr, M A Nickerson
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