Current Status and Development Prospects of Nuclear Quadrupole Resonance Pulsed Spectroscopy Methods: A Review

Optical Sensor System for 3D Jones Matrix Reconstruction of Optical Anisotropy Maps of Self-Assembled Polycrystalline Soft Matter Films

“…The resulting set of optical anisotropy maps was analyzed in a statistical approach using the following algorithms to calculate mean ( ), variance ( ), skewness ( ) and kurtosis ( ) [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ] where —CCD pixels quantity.…”

“…Figure 1 shows a diagram of the polarization interferome distributions of dehydrated films JMI [46,47,49]. 25), ( 26)) are used to obtain distributions of complex amplitudes according to the following algorithms:…”

“…Polarimetric studies of the polarization manifestations of BF anisotropy make it possible to detect pathological changes in the quaternary and tertiary polycrystalline structure of basic proteins (albumin and globulin) in blood plasma and other biological fluids, which are inaccessible in the most common biochemical methods. In a series of works [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ], the sensitivity of polarimetric methods to inflammatory, pathological and necrotic changes in the polycrystalline structure of films of blood plasma, urine, synovial fluid, and cerebrospinal fluid was demonstrated.…”

“…This polarimetric approach can be developed and generalized into a synthesis of polarization interference mapping and digital holographic reconstruction of object fields of complex amplitudes for layer-by-layer reconstruction of optical anisotropy maps of dehydrated BF films. Therefore, to improve the sensitivity and accuracy of polarimetric matrix diagnostics, it is urgent to create a new method for the layer-by-layer study of polycrystalline films of biological fluids by synthesizing polarization (Jones matrix) and interference methods [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ].…”

The Use of Marginal Oscillator Detector with Increased Conversion Linearity for Recording Broadband Multiplet Nuclear Quadrupole Resonance Spectra

“…The NQR method is based on the absorption of the energy of radio frequency (RF) waves by changing the orientation of the quadrupole moments of atomic nuclei in an inhomogeneous electric field created by charges external to the nucleus [10]. The levels of quadrupole energy in a solid arise from the interaction of quadrupole moments with an inhomogeneous electric field at the location of the resonating nucleus; therefore, the NQR spectrum reflects the electron density distribution near a particular atom.…”