Estimation of water retention parameters from nuclear magnetic resonance relaxation time distributions
نویسندگان
چکیده
منابع مشابه
Estimation of water retention parameters from nuclear magnetic resonance relaxation time distributions
[1] For characterizing water flow in the vadose zone, the water retention curve (WRC) of the soil must be known. Because conventional WRC measurements demand much time and effort in the laboratory, alternative methods with shortened measurement duration are desired. The WRC can be estimated, for instance, from the cumulative pore size distribution (PSD) of the investigated material. Geophysical...
متن کاملRelaxation Time Estimation from Complex Magnetic Resonance Images
Magnetic Resonance (MR) imaging techniques are used to measure biophysical properties of tissues. As clinical diagnoses are mainly based on the evaluation of contrast in MR images, relaxation times assume a fundamental role providing a major source of contrast. Moreover, they can give useful information in cancer diagnostic. In this paper we present a statistical technique to estimate relaxatio...
متن کاملNUCLEAR MAGNETIC RESONANCE STUDY OF THE STRUCTURE OF GLYOXALDIHYDRAZONE
Study of the nuclear magnetic resonance spectra of glyoxaldihydrazone in dimethylsulfoxide and deuterochlorofonn leads to the conclusion that this compound exists predominantly in non-chelate structure
متن کاملAmplitude Estimation in Nuclear Magnetic Resonance Data
Probability theory is applied to the problem of estimating the amplitudes of the sinusoids in nuclear magnetic resonance data containing two exponentially decaying sinusoids. The posterior probability-density of one of the amplitudes is derived independent of the phases, frequencies, decay-rate constants, variance of the noise, and the amplitude of the other sinusoid. This probability-density f...
متن کاملWater permeability of chlorella cell membranes by nuclear magnetic resonance: measured diffusion coefficients and relaxation times.
Measurement by two nuclear magnetic resonance (NMR) techniques of the mean residence time tau(a) of water molecules inside Chlorella vulgaris (Beijerinck) var. "viridis" (Chodot) is reported. The first is the Conlon and Outhred (1972 Biochim Biophys Acta 288: 354-361) technique in which extracellular water is doped with paramagnetic Mn(2+) ions. Some complications in application of this techniq...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Water Resources Research
سال: 2013
ISSN: 0043-1397
DOI: 10.1002/wrcr.20207