The effect of pathological processes on absorption and scattering spectra of samples of bile and pancreatic juice

Гираев, К. М.; Ашурбеков, Н. А.; Магомедов, М. А.; Murtazaeva, A. A.; Меджидов, Р. Т.

doi:10.1134/s0030400x15070097

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…where T s t (λ) and R s d (λ) are the transmission and reflection spectra of the samples; T gl (λ) and R gl (λ) are the reference signal spectra, measured with quartz plates; T 0 (λ) is the integrating sphere signal with covered input and open output ports; R 0 (λ) is the signal for a sphere with open optical ports. The calculation of the spectral dependence of the coefficients of optical absorption µ a and light scattering µ s was carried out using the inverse method of the Monte Carlo numerical simulation, developed and described in detail in the works [20][21][22].…”

Section: Methodsmentioning

confidence: 99%

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO3-Bi2Fe4O9 on C-Plane Al2O3 Substrate

Kallaev,

Sadykov,

Pavlenko

et al. 2023

Materials

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Nanocomposite films of BiFeO3-Bi2Fe4O9 were fabricated on a sapphire substrate Al2O3 using the method of gas discharge high-frequency cathodic sputtering of a ceramic target with a stoichiometric composition in an oxygen atmosphere. The results of the film analysis using X-ray structural analysis, Raman scattering, XPS, and atomic force microscopy are presented. The lattice parameters, surface topography, chemical composition of the films, concentration, and average sizes of the crystallites for each phase were determined. It was shown that the ratio of the BiFeO3 to Bi2Fe4O9 phases in the obtained film is approximately 1:2. The sizes of the crystallites range from 15 to 17 nm. The optical and magnetic properties of the nanocomposite layers were studied, and the band gap width and magnetization hysteresis characteristic of ferromagnetic behavior were observed. The band gap width was found to be 1.9 eV for the indirect and 2.6 eV for the direct interband transitions. The magnetic properties are characterized by a hysteresis loop resembling a “wasp-waist” shape, indicating the presence of magnetic anisotropy.

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Section: Methodsmentioning

confidence: 99%

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO3-Bi2Fe4O9 on C-Plane Al2O3 Substrate

Kallaev,

Sadykov,

Pavlenko

et al. 2023

Materials

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show abstract

“…For the purpose of complex radiation of the parameters of phase and amplitude (linear and circular dichroism) anisotropy of thē lms of biological°uids, we used a \blue" laser diode with a wavelength ¼ 0:405 m. This probing spectral range allows for simultaneous realization of birefringence-dichroism mechanisms. [40][41][42][43][44] 3. Results and Discussion 3.1.…”

Section: Methodsmentioning

confidence: 99%

“…Second, in the blue region of the spectrum, the absorption of molecular bile complexes is su±ciently larger. 42 Therefore, the predominance of circular dichroism is also quite pronounced. Third, the increase in circular birefringence and circular dichroism in the early stages of \CLS" can be associated with an increase in the concentration of cholesterol monohydrate and calcium bilirubinate.…”

Section: "mentioning

confidence: 99%

Biomedical applications of Jones-matrix tomography to polycrystalline films of biological fluids

Ушенко

Sdobnov

Mishalov

et al. 2019

J. Innov. Opt. Health Sci.

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Algorithms for reconstruction of linear and circular birefringence-dichroism of optically thin anisotropic biological layers are presented. The technique of Jones-matrix tomography of polycrystalline films of biological fluids of various human organs has been developed and experimentally tested. The coordinate distributions of phase and amplitude anisotropy of bile films and synovial fluid taken from the knee joint are determined and statistically analyzed. Criteria (statistical moments of 3rd and 4th orders) of differential diagnostics of early stages of cholelithiasis and septic arthritis of the knee joint with excellent balanced accuracy were determined. Data on the diagnostic efficiency of the Jones-matrix tomography method for polycrystalline plasma (liver disease), urine (albuminuria) and cytological smears (cervical cancer) are presented.

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Section: Optical Propertiesmentioning

confidence: 99%

Porous Hybrid PVDF/BiFeO3 Smart Composite with Magnetic, Piezophotocatalytic, and Light-Emission Properties

et al. 2023

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The creation of multi-stimuli-sensitive composite polymer–inorganic materials is a practical scientific task. The combination of photoactive magneto-piezoelectric nanomaterials and ferroelectric polymers offers new properties that can help solve environmental and energy problems. Using the doctor blade casting method with the thermally induced phase separation (TIPS) technique, we synthesized a hybrid polymer–inorganic nanocomposite porous membrane based on polyvinylidene fluoride (PVDF) and bismuth ferrite (BiFeO3/BFO). We studied the samples using transmission and scanning electron microscopy (TEM/SEM), infrared Fourier spectroscopy (FTIR), total transmission and diffuse reflection, fluorescence microscopy, photoluminescence (PL), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), vibrating-sample magnetometer (VSM), and piezopotential measurements. Our results demonstrate that the addition of BFO increases the proportion of the polar phase from 76.2% to 93.8% due to surface ion–dipole interaction. We also found that the sample exhibits laser-induced fluorescence, with maxima at 475 and 665 nm depending on the presence of nanoparticles in the polymer matrix. Furthermore, our piezo-photocatalytic experiments showed that under the combined actions of ultrasonic treatment and UV–visible light irradiation, the reaction rate increased by factors of 68, 13, 4.2, and 1.6 compared to sonolysis, photolysis, piezocatalysis, and photocatalysis, respectively. This behavior is explained by the piezoelectric potential and the narrowing of the band gap of the composite due to the mechanical stress caused by ultrasound.

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The effect of pathological processes on absorption and scattering spectra of samples of bile and pancreatic juice

Cited by 4 publications

References 16 publications

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO3-Bi2Fe4O9 on C-Plane Al2O3 Substrate

Exploring RF Magnetron Sputtering Growth Composite Thin Film BiFeO3-Bi2Fe4O9 on C-Plane Al2O3 Substrate

Biomedical applications of Jones-matrix tomography to polycrystalline films of biological fluids

Porous Hybrid PVDF/BiFeO3 Smart Composite with Magnetic, Piezophotocatalytic, and Light-Emission Properties

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