نتایج جستجو برای: proton shift

تعداد نتایج: 201000  

Journal: :Journal of biomolecular NMR 2015
Peter Kiraly Ralph W Adams Liladhar Paudel Mohammadali Foroozandeh Juan A Aguilar István Timári Matthew J Cliff Mathias Nilsson Péter Sándor Gyula Batta Jonathan P Waltho Katalin E Kövér Gareth A Morris

Spectral resolution in proton NMR spectroscopy is reduced by the splitting of resonances into multiplets due to the effect of homonuclear scalar couplings. Although these effects are often hidden in protein NMR spectroscopy by low digital resolution and routine apodization, behind the scenes homonuclear scalar couplings increase spectral overcrowding. The possibilities for biomolecular NMR offe...

2015
Peter Kiraly Ralph W. Adams Liladhar Paudel Mohammadali Foroozandeh Juan A. Aguilar István Timári Matthew J. Cliff Mathias Nilsson Péter Sándor Gyula Batta Jonathan P. Waltho Katalin E. Kövér Gareth A. Morris

Spectral resolution in proton NMR spectroscopy is reduced by the splitting of resonances into multiplets due to the effect of homonuclear scalar couplings. Although these effects are often hidden in protein NMR spectroscopy by low digital resolution and routine apodization, behind the scenes homonuclear scalar couplings increase spectral overcrowding. The possibilities for biomolecular NMR offe...

Journal: :The Journal of General Physiology 1993
J D Bisognano J A Dix P R Pratap T S Novak J C Freedman

Upon exposure of human red blood cells to hypertonic sucrose, the fluorescence of the potentiometric indicator 3,3'-dipropylthiadicarbocyanine iodide, denoted diS-C3(5), displays a biphasic time course indicating the rapid development of an inside-positive transmembrane voltage, followed by a slow DIDS (4,4'-diisothiocyano-2,2'-disulfonic acid stilbene)-sensitive decline of the voltage. In addi...

2015
Pooja Gaur William Grissom

Background/introduction MR temperature mapping based on the proton resonance frequency (PRF) shift is used in MR-guided focused ultrasound procedures for dosimetry and safety monitoring. While conventional PRF-shift thermometry is based on calculating a phase difference between two reconstructed MR images, Gaur et al [1,2] have recently described two algorithms that estimate temperatureinduced ...

2004
A. P. Martynenko

We calculate the corrections of orders α3, α4 and α5 to the Lamb shift of the 1S and 2S energy levels of muonic hydrogen (μp) and muonic deuterium (μd). The nuclear structure effects are taken into account in terms of the proton rp and deuteron rd charge radii for the one-photon interaction and by means of the proton and deuteron electromagnetic form factors in the case of one-loop amplitudes. ...

2013
Dongdong Kang Jiayu Dai Huayang Sun Yong Hou Jianmin Yuan

The structure and phase transition of high-pressure ice are of long-standing interest and challenge, and there is still a huge gap between theoretical and experimental understanding. The quantum nature of protons such as delocalization, quantum tunneling and zero-point motion is crucial to the comprehension of the properties of high-pressure ice. Here we investigated the temperature-induced pha...

Journal: :Sao Paulo medical journal = Revista paulista de medicina 2003
Sérgio Luiz Ramin Waldir Antonio Tognola Antonio Ronaldo Spotti

CONTEXT Proton spectroscopy has been recognized as a safe and noninvasive diagnostic method that, coupled with magnetic resonance imaging techniques, allows for the correlation of anatomical and physiological changes in the metabolic and biochemical processes occurring within previously-determined volumes in the brain. There are two methods of proton magnetic resonance spectroscopy: single voxe...

2002
S. Ishikawa

A modified version of the Faddeev three-body equation to accommodate the Coulomb interaction, which was used in the study of three-nucleon bound states, is applied to the proton-deuteron scattering problem at energies below the three-body breakup threshold. A formal derivation of the equation in a time-independent scattering theory is given. Numerical results for phase shift parameters are pres...

Journal: :The Journal of chemical physics 2006
Koji Ando

The semiquantal time-dependent Hartree (SQTDH) theory is applied to the coupled Morse and modified Lippincott-Schroeder (LS) model potentials of hydrogen bond. The structural correlation between the heavy atoms distance and the proton position, the geometric isotope effect, the energy of hydrogen bond formation, and the proton vibrational frequency shift are examined in a broad range of structu...

2002
S. Ishikawa

A modified version of the Faddeev three-body equation to accommodate the Coulomb interaction, which was used in the study of three-nucleon bound states, is applied to the proton-deuteron scattering problem at energies below the three-body breakup threshold. A formal derivation of the equation in a time-independent scattering theory is given. Numerical results for phase shift parameters are pres...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید