DOI: 10.5061/dryad.z612jm6jr
title: Data on the soybean infiltration process utilizing LF-NMR

description: This paper employs low-field nuclear magnetic resonance (LF-NMR)
 technology to meticulously analyze and explore the intricate soybean
 infiltration process. The methodology involves immersing soybeans in
 distilled water, with periodic implementation of Carr-Purcell-Meiboom-Gill
 (CPMG) pulse sequence experiments conducted at intervals of 20 to 30
 minutes to determine the relaxation time T2. Currently, magnetic resonance
 imaging (MRI) is conducted every 30 minutes. The analysis uncovers the
 existence of three distinct water phases during the soybean infiltration
 process: bound water denoted as T21, sub-bound water represented by T22,
 and free water indicated as T23. The evolution of these phases unfolds as
 follows: bound water T21 displays a steady oscillation within the
 timeframe of 0 to 400 minutes; sub-bound water T22 and free water T23
 exhibit a progressive pattern characterized by a rise-stable-rise
 trajectory. Upon scrutinizing the magnetic resonance images, it is
 discerned that the soybean infiltration commences at a gradual pace from
 the seed umbilicus. The employment of LF-NMR technology contributes
 significantly by affording an expeditious, non-destructive, and dynamic
 vantage point to observe the intricate motion of water migration during
 soybean infiltration. This dynamic insight into the movement of water
 elucidates the intricate mass transfer pathway within the soybean-water
 system, thus furnishing a robust scientific foundation for the
 optimization of processing techniques.
description: # Data on the Soybean Infiltration Process Utilizing LF-NMR
 This data set contains all
 data for studying the penetration process of soybeans using LF-NMR
 technology, including the proportions of bound water, sub-bound water, and
 free water in soybeans under different soaking times, as well as the T2
 times corresponding to these three water states. The NMI20-015V-I nuclear
 magnetic resonance analyzer‘s (Fig 1) main function was magnetic resonance
 imaging and relaxation time analysis of water-containing samples. Its
 resonance frequency (SFOI) was set to 20.826112 MHz. The magnetic field
 strength was 0.5T±0.08T and the coil diameter was 15 mm. The equipment was
 equipped with a thermostat to control the temperature at 32±0.01℃ to
 ensure the accuracy of experimental results. The soybeans were
 equilibrated to room temperature to measure the relaxation time T2 using
 the LF-NMR analyzer to generate a Carr–Purcell–Meiboom–Gill (CPMG) pulse
 sequence. The measurement conditions were as follows. The 90-degree RF
 pulse width (P1) was set to 16 μs, the 180-degree RF pulse width (P2) was
 set to 33.04 μs, the echo time (TE) was set to 0.200 ms, the echo number
 (NECH) was set to 18000, and the repeated scanning time (NS) was set to 8.
 The T2-FitFrm software was used to execute the fitting of T2 values. This
 experiment uses the three-component model (Fig 2) inherent in the multiple
 exponential decay framework of the CPGM pulse sequence to analyze the
 measured T2 relaxation time. The data in Soybean Infiltration Process
 Data.xlsx is the measured T2 relaxation time, using this data can obtain
 the T2 relaxation map of the soybean penetration process (Fig 3). Proton
 density A data for the three water states.xlsx records the changes in the
 A2 water ratio of three different phases over time (Fig7). Using the data
 in T2 peaks at different times.xlsx, the water binding state during
 soybean penetration can be analyzed (Fig4-6). Fig8 shows T1-weighted
 images collected every 30 minutes during soybean infiltration. ##
 Description of the data and file structure Soybean_dataset.zip |- Data/ |
 |- Soybean Infiltration Process Data.xlsx | |- Proton density A data for
 the three water states.xlsx | |- T2 peaks at different times.xlsx |-
 Results/ | |- Fig1.tif | |- Fig2.tif | |- Fig3.tif | |- Fig4.tif | |-
 Fig5.tif | |- Fig6.tif | |- Fig7.tif | |- Fig8.tif