Nuclear magnetic resonance (NMR) spectroscopy is a technique that detects the chemical environment of atomic nuclei by the absorption of radio-frequency electromagnetic radiation when in the ...

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These techniques cannot provide a dynamic visualization of the cellulose structure that is required to explain some of its properties. The complementary use of various spectroscopy techniques, such as ...

Although natural sources of compounds that contain the oxazolidin-2-one nucleus are very rare, 5 Kakeya et al. 6 were able to isolate a novel compound belonging to this class, ...

1 H and correlation spectroscopy (COSY) 2D 1 H-1 H nuclear magnetic resonance (NMR) spectra were obtained on a Bruker DRX spectrometer of 300 and 500 MHz. The samples were prepared by dissolving 5 mg ...

Wireless broadband is fueled by radio spectrum—the invisible real estate that makes your device mobile—and we don't have any more fuel to give. The federal government sits on nearly 60 percent ...

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Principle component analysis (PCA) was used to extract components from the solid-state nuclear magnetic resonance (NMR) spectra of bacterial cellulose (BC). Polymers such as cellulose have several ...