Data on the soybean infiltration process utilizing LF-NMR
Data files
Jan 09, 2024 version files 3.52 MB
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README.md
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Soybean_dataset.zip
Abstract
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.
README: Data on the Soybean Infiltration Process Utilizing LF-NMR
https://doi.org/10.5061/dryad.z612jm6jr
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