[Texture analysis of 3D models for the prediction of the grade of clear cell renal cell carcinoma of the kidney (pilot study)].

Aim: To evaluate the possibilities of textural analysis of 3D models in differentiating the degree of nuclear dysplasia of the clear cell renal cell carcinoma (ccRCC).

Materials And Methods: The specimens after surgical treatment of 190 patients with ccRCC were analyzed. In all cases, nephron-sparing surgery (NSS) was performed through laparoscopic access.

[Prospects for early detection of keratoconus based on systems built for computer-assisted diagnostics of structural changes in the cornea].

The article is devoted to the problem of diagnosing subclinical keratoconus (KK). The need to identify early signs of KK is primarily associated with the potential for the development of iatrogenic keratoectasia in cases of underdiagnosis of the disease when determining the conditions for laser keratorefractive surgery involving a decrease in the thickness of the cornea. Today generally accepted algorithms for early computer-assisted diagnosis of KK are mainly based on the analysis of various morphometric parameters of the cornea, reflecting changes in its shape and thickness induced by structural abnormalities.

Facilitating the acidic oxygen reduction of Fe-N-C catalysts by fluorine-doping.

As the alternatives to expensive Pt-based materials for the oxygen reduction reaction (ORR), iron/nitrogen co-doped carbon catalysts (FeNC) with dense FeN active sites are promising candidates to promote the commercialization of proton exchange membrane fuel cells. Herein, we report a synthetic approach using perfluorotetradecanoic acid (PFTA)-modified metal-organic frameworks as precursors for the synthesis of fluorine-doped FeNC (F-FeNC) with improved ORR performance. The utilization of PFTA surfactants causes profound changes of the catalyst structure including F-doping into graphitic carbon, increased micropore surface area and Brunauer-Emmett-Teller (BET) surface area (up to 1085 m g), as well as dense FeN sites.

[Use of intelligent analysis in urology].

The main methods of intellectual analysis (IA) used in modern medicine are described in the review. The main areas for IA application in the healthcare are diagnostics, treatment, prognosis of the course and efficiency of treatment in various diseases. The IA is based on mathematical methods and algorithms.

[Analysis of the learning curve in laparoscopic partial nephrectomy in patients with localized renal parenchymal lesions depending on the nephrometric score].

Aim: to analyze the learning curve of surgeons while performing laparoscopic partial nephrectomy in patients with localized renal parenchymal lesions by calculating the MIC (negative surgical margin, ischemia, and complications) index depending on tumor complexity according to the R.E.N.

[The construction of the three-dimensional model of the damaged bone tissue based on its roentgenogram].

The objective of the present work was to develop the method for the visualization of the shape of the bone surface in the region of its traumatic damage based on the results of the analysis of a single X-ray image for the solution of the problems facing forensic medical expertise and traumatology. The three-dimensional models of the fractures of the long tubular bones constructed with the use of the visualization technique were shown to adequately reproduce the morphological picture of the injury. It allowed to enhance the potential of the forensic medical analysis and the accuracy of the diagnostic methods employed for the purposes of forensic medical expertise.

Isotopic Self-Organization as an Informational Factor in Biological Systems.

We outline possible effects of isotopic randomness and isotopic self-organization (isotopicity) for biology, genetics, neurodynamics and conscious-ness. Prime ideas are (a) isotopic genetic code based on isotopic permutations in genomes, and (b) catalytic effects of decays of radioactive isotopes in physiology and psychology. We discuss the reasons why these ideas are presently severely under-appreciated by the biomedical research community.

A new sono-electrochemical method for enhanced detoxification of hydrophilic chloroorganic pollutants in water.

A new method for detoxification of hydrophilic chloroorganic pollutants in effluent water was developed, using a combination of ultrasound waves, electrochemistry and Fenton's reagent. The advantages of the method are exemplified using two target compounds: the common herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) and its derivative 2,4-dichlorophenol (2,4-DCP). The high degradation power of this process is due to the large production of oxidizing hydroxyl radicals and high mass transfer due to sonication.

Diffusion-limited extraction of organic ions by a track-membrane interfaced vacuum inlet.

Glycerol-wetted track membranes (polyethylene terephthalate) were used to interface a low-vacuum facility (approximately (10(-3) Torr) to an ambient pressure liquid analyte. High-field charge extraction conditions were routinely maintained between the liquid samples and a grid collector. The latter was positioned just near to the vacuum-facing side of such membranes.

Combined micro-droplet and thin-film-assisted pre-concentration of lead traces for on-line monitoring using anodic stripping voltammetry.

An improved analytical method for airborne lead traces is reported. It is based on using a Venturi scrubber sampling device for simultaneous thin-film stripping and droplet entrapment of aerosol influxes. At least threefold enhancement of the lead-trace pre-concentration is achieved.

Photochemical study of anthracene crystallites by Fourier transform spectroscopic imaging.

Fourier transform-based spectroscopic imaging was used for direct, time-resolved, analysis of UV-irradiated anthracene crystallites. Well-resolved fluorescence spectra were obtained at a spatial resolution of 1 microm. The appearance of such photochemical by-products as dianthracene and anthraquinone was monitored throughout the irradiation experiments.

Non-aqueous-phase-liquid breakthrough during evaporative drying of clay barriers.

In this study, an attempt has been made to model a real field scenario, whereby an initially almost saturated clay liner in a waste site is gradually drying, due to evaporation at its lower boundary. A detailed conceptual model that deals with the penetration and breakthrough of non-aqueous-phase-liquid (NAPL) in clay liners is introduced. Water content of clay samples was monitored during ambient evaporation through apertures at the base of sample holders.

Direct mass-quantification of particulate deposits of polycyclic aromatic hydrocarbons by Fourier transform imaging microscopy.

Successful coupling of imaging microscopy with Fourier transform spectrometry provides a new methodological approach. This was applied to the direct analysis of particulate deposits of polycyclic aromatic hydrocarbons (PAHs). The fluorescence signals of single microscopic particulates were found to be proportional to their mass, obtained from the corresponding HPLC results.

Laser-induced fluorescence of perylene in a microparticle suspension environment.

Laser-induced fluorescence (LIF) is one of the most sensitive techniques for analysis of traces of polycyclic aromatic compounds in liquids. Application of this method to on-line monitoring requires solution of problems related to the presence of particulate materials. Thus, understanding the analytical effects associated with the suspension of microparticles is of considerable importance for both environmental and industrial applications.

Determination of aqueous solubility and surface adsorption of polycyclic aromatic hydrocarbons by laser multiphoton ionization.

Polycyclic aromatic hydrocarbons (PAHs) are of considerable analytical interest due to their environmental effects. On-line monitoring of these compounds based on microdroplet sampling requires accurate characterization of their solubilities and surface adsorption. A new method to determine aqueous solubility and surface adsorption of PAHs is suggested, using a combination of microdroplet sampling and multiphoton ionization-based fast-conductivity (MPI-FC) techniques.

Thermally activated electrostatic injection of solvated ions by a track membrane interfaced vacuum feedthrough.

Electromembrane ion sources are considered as potential techniques for direct mass spectrometric sampling from ambient conditions. Interfacing of a time-of-flight mass spectrometer by means of a poly(ethylene terephthalate) track membrane requires investigation of the thermally activated processes involved. In this study, we directly attempt substantiating an activation-like performance of such track membrane-mediated interfaces.

Absolute analysis of particulate materials by laser-induced breakdown spectroscopy.

We have developed a new data acquisition approach followed by a suitable data analysis for Laser-induced breakdown spectroscopy. It provides absolute concentrations of elements in particulate materials (e.g.

A renewable liquid droplet method for on-line pollution analysis by multi-photon ionization.

A multi-photon ionization based fast conductance (MPI-FC) technique was applied to detect combustion byproduct aerosols. These PAH-polluted aerosols were on-line sampled by means of renewable water microdroplets. The environmental cases considered here have involved such common air contaminants as motor car exhaust gas and cigarette smoke.

Particulate material analysis by a laser ionization fast conductivity method. Water content effects.

Combined laser multiphoton ionization and fast-conductivity methods have been applied to probe organic contamination on wet particulate samples. This is a first attempt of testing such a technique for this purpose. A special emphasis has been made on establishing correlation between sample water content and detection of pyrene, which has been used as a probe contaminant in this study.

Laser two-photon ionization of pyrene on contaminated soils.

We report a first attempt to use the laser multiphoton ionization method for analysis of trace aromatic compounds on the surface of environmental (soils) and artificial (silica) samples. The measurement setup is composed of a N(2) pulsed laser and a fast conductivity detection system. The technique has been tested for detection of pyrene deposited on moist fine-powdered samples.