Influence of paramagnetic admixtures on nuclear magnetic relaxation of tissue water protons

Nuclear spin echo has been used to investigate the possible influence of paramagnetic impurities on spin-lattice relaxation of tissue water protons in aloe leaves. A simple way of solving the problem of the influence of paramagnetic inclusions on the nuclear magnetic relaxation times of water protons in plant tissues is described. It is concluded that in plant tissue one may ignore the influence of oxygen and any paramagnetic impurities on the spin-lattice relaxation of water protons. © 1992

Concerning measurements of the self-diffusion coefficient of water molecules and time of proton spin-lattice relaxation in plant tissues

Measurements of the coefficient of water molecules self-diffusion (D) and the time of spin-lattice relaxation (T 1) in prosenchyme (elongated) plant cells, whose length significantly exceeding their transverse size, show that the orientation of plant tissues in the H o field significantly affects the measured parameters. We conclude that this effect should be taken into account in experiments on the measurement of self-diffusion coefficients and time of proton spin-lattice relaxation in plant tissues containing prosenchyme cells

Spin-lattice relaxation of water protons in plant and animal cells

NMR-spin echo method has been used to study spin-lattice relaxation time of protons T1 in plant and animal cells - muscle tissue of fish, the cells of which unlike plant cells have no developed system of vacuoles, plastids and a solid cell wall. According to the values of T1 time a new NMR parameter K, a coefficient of relaxation effectiveness of a cell structure, has been calculated. This parameter can be used for quantitative characterization of the influence of different cell structures, the tissue water interact with, for a time of spin-lattice relaxation of water protons. It has been ascertained that the values of K coefficient in animal tissue and in storing tissues of some plants differ little; it may be stipulated by permanent transmembrane water exchange which occurs at high rate in the living cell. It has been concluded that there exists a certain similarity between water state in protoplast of plant and animal cells. © 2012 Pleiades Publishing, Ltd

Investigation of the effect of paramagnetic impurities on the spin-lattice relaxation of protons of intracellular water

The authors have studied the effect of the paramagnetic ions - Mn2+ and Fe3+ - on the spin-lattice relaxation of the protons of water in plant cells. It has been established that the paramagnetic impurities contained in plant cells in the usual conditions (in natural quantities) have no appreciable influence on the rate of the spin-lattice relaxation of the protons of water. On the basis of investigation of the proton spin-lattice relaxation with a raised content of the paramagnetic ions (Mn2+) in plant cells the possibility of separating the relaxation times T1l and T1s to which correspond different fractions of water in the cells is demonstrated. © 1979

Influence of paramagnetic admixtures on nuclear magnetic relaxation of tissue water protons

Nuclear spin echo has been used to investigate the possible influence of paramagnetic impurities on spin-lattice relaxation of tissue water protons in aloe leaves. A simple way of solving the problem of the influence of paramagnetic inclusions on the nuclear magnetic relaxation times of water protons in plant tissues is described. It is concluded that in plant tissue one may ignore the influence of oxygen and any paramagnetic impurities on the spin-lattice relaxation of water protons. © 1992

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Concerning measurements of the self-diffusion coefficient of water molecules and time of proton spin-lattice relaxation in plant tissues

Measurements of the coefficient of water molecules self-diffusion (D) and the time of spin-lattice relaxation (T 1) in prosenchyme (elongated) plant cells, whose length significantly exceeding their transverse size, show that the orientation of plant tissues in the H o field significantly affects the measured parameters. We conclude that this effect should be taken into account in experiments on the measurement of self-diffusion coefficients and time of proton spin-lattice relaxation in plant tissues containing prosenchyme cells

Concerning measurements of the self-diffusion coefficient of water molecules and time of proton spin-lattice relaxation in plant tissues

Measurements of the coefficient of water molecules self-diffusion (D) and the time of spin-lattice relaxation (T 1) in prosenchyme (elongated) plant cells, whose length significantly exceeding their transverse size, show that the orientation of plant tissues in the H o field significantly affects the measured parameters. We conclude that this effect should be taken into account in experiments on the measurement of self-diffusion coefficients and time of proton spin-lattice relaxation in plant tissues containing prosenchyme cells