NMR/MRI Articles

Characterization of Water State and Distribution 1 in Textured 2 Soybean Protein Using DSC and NMR1

Characterization of Water State and Distribution 1 in Textured 2 Soybean Protein Using DSC and NMR1

 Characterization of Water State and Distribution 1 in Textured 2 Soybean Protein Using DSC and NMR1 Abstract  To explore the role of water during extrusion cooking and the scientific basis for demarcating low-intermediate-moisture and high-moisture extrusion technique, soybean protein isolate (SPI) was processed using a pilot-scale twin-screw extruder under 28-60% moisture content and 140-160 cooking temperature. The state of water in textured soybean protein (TSP) with different treatments were analyzed by using differential scanning calorimetry (DSC) and low field nuclear magnetic resonance (LF-NMR) together. The distribution of water in TSP was characterized by using magnetic resonance imaging (MRI). The results showed that there were at least two categories o……

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Exploring of SPION-based MRI contrast agents which with excellent water-dispersibility and high specificity to cancer cells

Exploring of SPION-based MRI contrast agents which with excellent water-dispersibility and high specificity to cancer cells

Exploring of SPION-based MRI contrast agents which with excellent water-dispersibility and high specificity to cancer cells Abstract  Advances in contrast agents have greatly enhanced the sensitivity of magnetic resonance imaging (MRI)technique for early diagnosis of cancer. However, the commercial superparamagnetic iron oxide nanopar-ticles (SPION)-based contrast agents synthesized by co-precipitation method are not monodisperse withirregular morphologies and ununiform sizes. Other reported SPION-based contrast agents synthesizedby solvothermal method or thermal decomposition method are limited by the bad water-dispersibilityand low specificity to cancer cells. Herein, we propose a new strategy for exploring SPION-based MRIcontrast agents with excellent water-disp……

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Multifunctional Upconversion–nanoparticles–trismethylpyridylporphyrin–fullerene Nanocomposite: a Near-infrared Light-triggered Theranostic Platform for Imaging-guided Photodynamic Therapy

Multifunctional Upconversion–nanoparticles–trismethylpyridylporphyrin–fullerene Nanocomposite: a Near-infrared Light-triggered Theranostic Platform for Imaging-guided Photodynamic Therapy

Multifunctional Upconversion–nanoparticles–trismethylpyridylporphyrin–fullerene Nanocomposite: a Near-infrared Light-triggered Theranostic Platform for Imaging-guided Photodynamic Therapy Abstract  Photodynamic therapy (PDT) is an excellent therapeutic modality for various malignant and nonmalignant cancers. This approach utilizes reactive oxygen species generated through the reaction between photosensitizer and oxygen in tissues upon light irradiation to achieve effective treatment. However, limited penetration depth and oxygen-deficient microenvironment hinder the efficiency of PDT. In this work, we design a multifunctional near-infrared (NIR)-triggered theranostic agent based on upconversion–nanoparticles-Polyoxyethylene bis (amine)–trismethylpyridylporphyrin–fu……

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Tunable T1 and T2 Contrast Abilities of Manganeseengineered Iron Oxide Nanoparticles through Size Control

Tunable T1 and T2 Contrast Abilities of Manganeseengineered Iron Oxide Nanoparticles through Size Control

Tunable T1 and T2 Contrast Abilities of Manganeseengineered Iron Oxide Nanoparticles through Size Control Abstract  In this paper, we demonstrate the tunable T1 and T2 contrast abilities of engineered iron oxide nanoparticles with high performance for liver contrast-enhanced magnetic resonance imaging (MRI) in mice. To enhance the diagnostic accuracy of MRI, large numbers of contrast agents with T1 or T2 contrast ability have been widely explored. The comprehensive investigation of high-performance MRI contrast agents with controllable T1 and T2 contrast abilities is of high importance in the field of molecular imaging. In this study, we synthesized uniform manganese-doped iron oxide (MnIO) nanoparticles with controllable size from 5 to 12 nm and comprehensively in……

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1H NMR Studies of Starch–water Interactions during Microwave Hating

1H NMR Studies of Starch–water Interactions during Microwave Hating

 1H NMR Studies of Starch–water Interactions during Microwave Hating Abstract  The aim of the present study was to investigate the effect of microwave heating on water distribution and dynamics in starch granules during the gelatinization of starch. Starch samples treated with microwave heating, rapid conventional heating and conventional heating was measured by 1H NMR to examine the water distribution and dynamics in rice starch granules at a water activity of 0.686. The system proton longitudinal and transverse relaxation times were determined using inversion recovery (IR) and Carr–Purcell–Meiboom–Gill (CPMG) pulse sequences. The results showed that the T1 of the water molecules in the samples treated with any of the three heating methods exhibited two distinct s……

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