NMR/MRI Applications

NMR Application in Petroleum & Porous Medium

NMR Application in Petroleum & Porous Medium

NMR Applications in Petroleum & Porous Medium Petroleum & Porous Medium NMR well-logging technology is used to reservoir evaluation and formation evaluation. NMR technology can acquire abundant formation information, such as flowing liquid content in a formation, porosity, permeability, oil saturation, aperture size and distribution in rock and so on. The advantages of NMR technology is high precision, simple calibration, avoiding influence of slopping, acquiring many parameters in one well-logging. Geotechnical & Coal mine. 1.LTHP condition for freezing and thawing mechanism analysis  Freezing and thawing mechanism analysis of soil or rock Rock damage degradation under freezing and thawing condition Mechanism of natural gas hydrate formation and de……

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Application of 2D NMR Techniques in core analysis

Application of 2D NMR Techniques in core analysis

Abstract This review paper introduces 2DNMR pulse trains frequently used in core analysis and their applications, as well as relevant relaxation mechanisms. 2D NMR technique content of D-T2 sequence, T1-T2 sequence and 2D NMI technology which can be used to measure the property parameters of formation fluid and the physics parameters directly, such as diffusion coefficient, relaxation time, oil saturation, porosity, permeability and so on. The 2D NMR map can also be used to distinguish between oil, gas and water. Introduction Crude oil, water and gas from core are rich in hydrogen nuclei; one-dimensional NMR technique is to measure the T2 relaxation time. Most of time the oil and water T2 relaxation time will be overlap, it’s difficult to distinguish, restricted the N……

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NMR Analyzer Application on Aquatic Products Quality Monitoring during Storage

NMR Analyzer Application on Aquatic Products Quality Monitoring during Storage

NMR Analyzer Applications overview:   Moisture is the main component of many foods, each food has a specific moisture content that present in appropriate quantities and specific orientation. Moisture content has a lot of influence on the food structure, appearance and susceptibility to corruption. In addition, NMR analyzer has been widely used in the proton study. In 1950, the USA have already begun to study the hydration of the food by NMR techniques. Recently, domestic NMR study in the water phase, distribution and migration of the food moisture, etc. reflecting the changes of the food ingredients such as proteins, showing the process of the changes in food quality. Low field NMR applications: Water migration and quality monitoring during the aquatic products ……

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Principles and Evaluation of Contrast Agents in NMR

Principles and Evaluation of Contrast Agents in NMR

What is contrast agent?   Magnetic resonance imaging (MRI) is widely used in medical imaging and it has no radiation damage, also can be flexible tomography at any orientation. In addition, it can be applied in proton density, relaxation, weighted imaging and has the advantages of multi-parameter characteristics. Now MRI has become the most powerful means of detection. However, it is difficult to diagnose owing to the relaxation time overlap between some different tissue and tumors. So people began to study the MRI contrast agent to enhance the signal contrast and improve the image resolution. The contrast agent can change the tissue local relaxation characteristics; improve the imaging contrast, so that the accuracy of diagnosis will be improved. Contrast agent ……

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NMR Method for Measuring the Oil Content of Oil Seeds

NMR Method for Measuring the Oil Content of Oil Seeds

Application principle: As a nondestructive testing technology, there have perfect research system and mature achievement for the detection of Oil &Moisture content detection field based on the relaxation time of the low field NMR. Oil &Moisture rate detection also plays an important role in the agriculture and food industry. At present, international standards ISO10565:1995< oilseeds, Simultaneous determination of Oil &Moisture content and pulsed NMR measurement> and national standard GB / T 15690:1995< Oil content of oilseed NMR measurement>.It is suitable for the oilseed containing content below 10%, such as rapeseed, soybean, flaxseed, sunflower seeds, sesame, cotton seed and others. If the moisture content is higher than 10%, drying treatme……

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