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Time Domain NMR FID Experiments(Part I)
May 21, 2021
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Blog
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NMR Principle
Time Domain NMR FID Experiments(Part I) Introduction The simplest NMR experiment is called an FID (Free Induction Decay) experiment. A single RF pulse (normally a 90 degree pulse) is applied to the sample and the response is measured as a function of time after the RF excitation. Because of its simplicity, the FID application is often used to set up the NMR instrument. In ...
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Structure of Benchtop NMR, nuclear magnetic Resonance
May 14, 2021
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Blog
Structure of Benchtop NMR, nuclear magnetic Resonance The architecture of Benchtop NMR: Benchtop NMR can be divided into four parts: magnet, radio frequency, spectrometer and temperature control. Magnet: providing uniform magnetic field; RF Unit: RF amplification and signal excitation; Spectrometer: a control system for Benchtop NMR; Temperature control: acc ...
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NMR relaxation mechanism of rock pore fluid
April 27, 2021
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Blog
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Rock Core & Porous Media
NMR relaxation mechanism of rock pore fluid Three different relaxation mechanisms, free relaxation, surface relaxation and diffusion relaxation, exist in the NMR relaxation of rock pore fluids. Generally, the three relaxation behaviors exist simultaneously. 1. Free relaxation Free relaxation, that is, the body relaxation phenomenon unique to fluids, the relaxation ti ...
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Sulfur powder oil content test (low-field nuclear magnetic method)
April 8, 2021
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Blog
Sulfur powder oil content test (low-field nuclear magnetic method) In the production process of chemical powders (such as sulfur), a certain amount of oil is added according to product quality and characteristic requirements to improve product performance and facilitate production and processing. The powder also contains moisture. The content of these liquids in the powder ...
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NMR cryoporometry-low field NMR
April 2, 2021
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Rock Core & Porous Media
NMR cryoporometry-low field NMR NMR cryoporometry (NMR-C) is an emerging pore characterization technology that can cover the test range of nanopores, can achieve continuous measurement of the same sample, and can directly and efficiently obtain pore size distribution, porosity, and other information. The test process has little disturbance to the sample and has shown great ...
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Low-field NMR Technology Used in Moisture Analysis of Food and Agricultural Products
March 29, 2021
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Food & Agriculture
Low-field NMR Technology Used in Moisture Analysis of Food and Agricultural Products Low-field NMR (LF-NMR) and its imaging technology (MRI) have been researched and applied in the direction of food and agricultural products due to their rapid detection, non-destructive, and simultaneous acquisition of sample signal information in time and space. . This article briefly des ...
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