ML-driven segmentation of microvascular features during histological examination of tissue-engineered vascular grafts.

Introduction: The development of next-generation tissue-engineered medical devices such as tissue-engineered vascular grafts (TEVGs) is a leading trend in translational medicine. Microscopic examination is an indispensable part of animal experimentation, and histopathological analysis of regenerated tissue is crucial for assessing the outcomes of implanted medical devices. However, the objective quantification of regenerated tissues can be challenging due to their unusual and complex architecture.

Overtone spectroscopy of v(C=O) stretching vibration of hexafluoroacetone: Experimental and ab initio determination of peak positions, absolute intensities, and band shapes.

Infrared overtone spectra of the ν(C = O) stretching vibration (ν) of gaseous hexafluoroacetone ((CF)C = O, HFA) were recorded in the spectral range of 7450-3300 cm with a resolution of 0.1 cm. Experimental absolute IR intensities and vibrational band centers of the overtones 2ν, 3ν, 4ν of HFA were measured and compared with their ab initio counterparts, calculated by the second-order canonical vibrational perturbation theory (CVPT2).

IVR Dynamics of Vibrational Levels of the ν Mode in (CF)C═C═O Molecules Excited by Resonant IR Femtosecond Radiation.

The intramolecular dynamics of vibrational levels (up to v = 5) of the ν mode in the (CF)CCO molecule that is induced by a multiphoton selective excitation of this mode by resonant femtosecond IR radiation has been studied. The times of intramolecular vibrational energy redistribution (IVR) from each vibrational level to remaining molecular modes have been determined. In accordance with theoretical predictions, a decrease in the IVR time with increasing quantum number v has been observed for the first time.

Electrical conductivity of a monolayer produced by random sequential adsorption of linear k-mers onto a square lattice.

The electrical conductivity of a monolayer produced by the random sequential adsorption (RSA) of linear k-mers (particles occupying k adjacent adsorption sites) onto a square lattice was studied by means of computer simulation. Overlapping with predeposited k-mers and detachment from the surface were forbidden. The RSA process continued until the saturation jamming limit, p_{j}.

Percolation and jamming of linear k-mers on a square lattice with defects: Effect of anisotropy.

Using the Monte Carlo simulation, we study the percolation and jamming of oriented linear k-mers on a square lattice that contains defects. The point defects with a concentration d are placed randomly and uniformly on the substrate before deposition of the k-mers. The general case of unequal probabilities for orientation of depositing of k-mers along different directions of the lattice is analyzed.

Jamming and percolation in generalized models of random sequential adsorption of linear k-mers on a square lattice.

The jamming and percolation for two generalized models of random sequential adsorption (RSA) of linear k-mers (particles occupying k adjacent sites) on a square lattice are studied by means of Monte Carlo simulation. The classical RSA model assumes the absence of overlapping of the new incoming particle with the previously deposited ones. The first model is a generalized variant of the RSA model for both k-mers and a lattice with defects.

Impact of defects on percolation in random sequential adsorption of linear k-mers on square lattices.

The effect of defects on the percolation of linear k-mers (particles occupying k adjacent sites) on a square lattice is studied by means of Monte Carlo simulation. The k-mers are deposited using a random sequential adsorption mechanism. Two models L(d) and K(d) are analyzed.

Intramolecular vibrational dynamics in free polyatomic molecules with C═O chromophore bond excited by resonant femtosecond IR laser radiation.

In nine polyatomic molecules, we have studied the intramolecular redistribution of vibrational energy from chromophore C═O group excited by a resonant femtosecond IR laser radiation at a wavelength of ∼5 μm. All experiments have been performed in the gas phase using the IR-IR pump-probe technique in combination with the spectral analysis of the probe radiation. For molecules with one C═O end group, characteristic times of intramolecular vibrational redistribution (IVR) lie in the range between 2.

Percolation of linear k-mers on a square lattice: from isotropic through partially ordered to completely aligned states.

Numerical simulations by means of Monte Carlo method and finite-size scaling analysis have been performed to study the percolation behavior of linear k-mers (also denoted in publications as rigid rods, needles, sticks) on two-dimensional square lattices L × L with periodic boundary conditions. Percolation phenomena are investigated for anisotropic relaxation random sequential adsorption of linear k-mers. Especially, effect of anisotropic placement of the objects on the percolation threshold has been investigated.

Random sequential adsorption of partially oriented linear k-mers on a square lattice.

Jamming phenomena on a square lattice are investigated for two different models of anisotropic random sequential adsorption (RSA) of linear k-mers (particles occupying k adjacent adsorption sites along a line). The length of a k-mer varies from 2 to 256. The effect of k-mer alignment on the jamming threshold is examined.

[Possibile application of X-ray and high resolution CT in pneumoconiosis management].

The article covers results of clinical and roentgenologic data analysis. The data were obtained in the study that covered 447 pneumoconiosis patients, 75 of which were subjected to high resolution CT. If compared to chest X-ray, high resolution CT helps more precise forecast of further course in pneumoconiosis.

Recent achievements in nanostructured photovoltaic devices.

This mini-review summarizes some key interesting applications and perspectives of nanostructured devices for future nanoelectronics, among them are photonic circuits, carbon nanostructures for chemisensors, unique Ag-Cu-nanocluster contacts for high-effective solar cells. Recent patents in the field are also discussed.

[Improving the system of methods covering clinical and rentgenologic observation over workers exposed to dust aerosol].

The article deals with analysis of clinical and rentgenologic changes in various pneumoconiosis types over 1960 to 2007 in Novosibirsk region. Findings are that analogous plain film fails to diagnose pulmonary pneumoconiosis. Pneumoconioses associated with "minimal" dust invasions in 10-15% of cases are not revealed by plain films.

[The choice of surgical treatment for inguinal hernia].

Basing on the 30-year experience of prof. Yu.A.

[Basic principles of treatment for patients with acute pancreatitis].

The results of treatment of 1,320 patients with acute pancreatitis were analysed, 460 of them had the destructive form of the disease. The high significance of multicomponent etiopathogenetic treatment is demonstrated. The importance of etiotropic treatment with the application of endoscopic interventions, as well as treatment with cytostatics is emphasized.

[Adoptive laser immunotherapy and photodynamic therapy in ORL oncology].

Present-day developments in oncological applications of laser therapy are adaptive laser immunotherapy (ALIT) and photodynamic therapy (PDT). ALIT (helium-neon laser) was used in 35 ENT-cancer patients to irradiate immunocompetent leukocytes isolated from blood in an Amino cell separator. The use of ALIT in the combined treatment of our patients improved their health condition.

[Immunoregulation in the treatment of patients with acute pancreatitis].

The article analyses certain indicators of immune reactivity in 67 patients with different forms of pancreatitis. Lower reactivity of the organism in destructive pancreatitis determines the necessary use of immune modulating therapy in the complex treatment of this disease and purulent complications. In patients with high risk of pyo-septic complications the administration of cytostatics is not indicated.

[Morphology of the pancreas during intra-aortal administration of 5-fluorouracil].

The results of the studies of morphological changes in the pancreas during intraaortal injections of various 5-fluorouracil doses to 44 dogs are reported. It was experimentally established that intraaortal injection of 10 mg 5-fluorouracil per kg of mass for 3 days caused the delay in albumin-synthesizing organella function, without damaging organellas as such. Administration of a cytostatic in a dose of 15 mg per kg of mass did not only cause a drastic decline in the synthesizing activity of cells in acinar parenchyma, but also induced intracellular lesions.