手術室この一年

It was shown that upon treatment of solids in a low-pressure (1.33-133 Pa) RF plasma the positive charge layer formed near the treated solid not only accelerates ions but also concentrates the ion flux at local inhomogeneities of the surface charge density. © 2007 by Allerton Press, Inc

Mathematical model of interaction of low-pressure RF discharge plasma with solid surfaces

It was shown that upon treatment of solids in a low-pressure (1.33-133 Pa) RF plasma the positive charge layer formed near the treated solid not only accelerates ions but also concentrates the ion flux at local inhomogeneities of the surface charge density. © 2007 by Allerton Press, Inc

Fosfomycin in antibiotic prophylaxis of infectious complications after biopsy of the prostate

Introduction. Biopsy of prostate is a routine urologic procedure. More than 1 million biopsies are performed worldwide annually. The frequency of infectious-inflammatory complications remain high, despite the recommended antibiotic prophylaxis schemes.Aim. The evaluation of  effectiveness and safety of  combined antimicrobial prophylaxis: Fosfomycin and Fluoroquinolones of 3rd generation.Materials and methods. 80 patients underwent prostate biopsy in our study and were divided into 2 groups: the first group of 40 patients received routine prophylaxis: Levofloxacin 500 mg 6 hours before the biopsy and 500 mg per day during 4 days after biopsy. The second group of 40 patients, along with standard prophylaxis as in the first group, additionally after biopsy received Fosfomycin 3 gr single-shot.Results and discussion. In the first group, infectious and inflammatory complications occurred in 8 patients (20%). 12.5% of patients from the first group were hospitalized for paranteral antibiotic therapy. The average length of stay in hospital was 3.4 ± 1.45 days. In all cases, in the first group of patients, E. coli was detected, in 70% of cases fluoroquinolone-resistant strain of the bacterium was received. In the second group of patients now hospitalization was required. One patient out of forty (2.5%) from this group showed signs of urinary tract infection, which was not accompanied by an increase of body temperature, as well as changes in blood and urine tests.Conclusion. Our results show good effectiveness and safety of fosfomicin for antibiotic prophylaxis for transrectal prostate biopsy

The influence of RF plasma treatment at low pressure on the permeability of a polyurethane nanocomposite

The statistical model of treatment of a polyurethane nanocomposite by low-energy ionic streams in RF plasma at pressure in the range 13.3-133 Pa is developed. The dependence of the permeability of a filled nanocomposite on the filler mass fraction, both before and after RF plasma treatment, is theoretically investigated. © 2014 Allerton Press, Inc

Phase transition and anomalous electronic behavior in layered dichalcogenide CuS (covellite) probed by NQR

Nuclear quadrupole resonance (NQR) on copper nuclei has been applied for studies of the electronic properties of quasi-two-dimensional low-temperature superconductor CuS (covellite) in the temperature region between 1.47 and 290 K. Two NQR signals corresponding to two non-equivalent sites of copper in the structure, Cu(1) and Cu(2), has been found. The temperature dependences of copper quadrupole frequencies, line-widths and spin-lattice relaxation rates, which so far had never been investigated so precisely for this material, altogether demonstrate the structural phase transition near 55 K, which accompanies transformations of electronic spectrum not typical for simple metals. The analysis of NQR results and their comparison with literature data show that the valence of copper ions at both sites is intermediate in character between monovalent and divalent states with the dominant of the former. It has been found that there is a strong hybridization of Cu(1) and Cu(2) conduction bands at low temperatures, indicating that the charge delocalization between these ions takes place even in 2D regime. Based on our data, the occurrence of energy gap, charge fluctuations and charge-density waves, as well as the nature of phase transition in CuS are discussed. It is concluded that some physical properties of CuS are similar to those of high-temperature superconductors (HTSC) in normal state.Comment: to be publishe

Paper estimability of heavy oil viscosity by nuclear magnetic resonances researchestitle

Copyright © 2014, Society of Petroleum Engineers. This paper presents the results of laboratory and nuclear magnetic resonances researches of seventy-seven crude oil samples from the Devonian, Carboniferous and Permian formations of Tatarstan oil fields with a wide range of viscosity varying from several cps to 60,000 cps. The results can be used to estimate the viscosity of the oil, including in situ viscosity. It has been found that the NMR relaxation characteristics of the tested samples presented in the form of T2 time distribution spectra confirm that crude oil is multicomponent. Numerical characteristics resulting from the analysis of the spectrum of spin-spin relaxation time T2 have been determined, which show good correlation with the viscosity of the hydrocarbon fluid. The paper presents the obtained experimental correlations between the rheological properties and NMR characteristics for oil samples studied

Novel Azo-Dyes-Modified Isatin Derivatives: Synthesis, UV/VIS Spectroscopic, and Electrochemical Study

© 2016 Wiley-VHCA AG, ZürichA high-yield and simple synthesis of certain aminomethylisatins bearing dye fragments via the Mannich reaction of isatin with amino-containing azobenzenes was reported. It was found that the absence of electron-donating groups in azo-dye molecule prevents aminomethylation of isatin. The effect of the incorporation of an isatin moiety with an azobenzene dye in one molecule on its absorption and electrochemical behavior was studied using UV spectroscopy and cyclic voltammetry

Ion metal synthesis in viscous organic matter

The viscosity of the irradiated target as new parameter was introduced in ion implantation physics of organic matter. It was experimentally shown that using this parameter one enables to monitor the process of ion synthesis of thin granular impurity films. As an example, the results of high-dose implantation of Co+ and Ag+ ions in viscous epoxy experimenting stages of cure (polymerization) process are presented. It was established by TEM that the mean size, size distributions, form and crystalline structure of the synthesized metal particles depend on both ion beam parameters and viscosity of the epoxy target. The mechanisms of homogeneous nucleation and diffusive growth of metal particles in the low-viscosity epoxy in contrast to heterogeneous nucleation in solid polymers are discussed. The threshold implantation dose that is necessary for the formation of stable metal phase nucleation in a viscous medium was calculated by using the diffusion equation with a continuous Gauss-like source for the implanting impurity. It is shown that the specificity of epoxy polymerization influences the growth and crystalline structure of metal particles at intermediate stages of the epoxy cure process. The preliminary investigation of magnetic, optical and electrical properties of synthesized films is described as well

Self-assembled nanoformulation of methylprednisolone succinatewith carboxylated block copolymer for local glucocorticoid therapy

A new self-assembled formulation of methylprednisolone succinate (MPS) based on a carboxylatedtrifunctional block copolymer of ethylene oxide and propylene oxide (TBC-COOH) was developed. TBC-COOH and MPS associated spontaneously at increased concentrations in aqueous solutions to form almostmonodisperse mixed micelles (TBC-COOH/MPS) with a hydrodynamic diameter of 19.6 nm, zeta potentialof −27.8 mV and optimal weight ratio ∼1:6.3. Conditions for the effective formation of TBC-COOH/MPSwere elucidated by comparing copolymers and glucocorticoids with different structure. The micellarstructure of TBC-COOH/MPS persisted upon dilution, temperature fluctuations and interaction with bloodserum components. TBC-COOH increased antiradical activity of MPS and promoted its intrinsic cytotoxi-city in vitro attributed to enhanced cellular availability of the mixed micelles. Intracellular transportationand hydrolysis of MPS were analyzed using optimized liquid chromatography tandem mass spectrometrywith multiple reaction monitoring which showed increased level of both MPS and methylprednisolonein neuronal cells treated with the formulated glucocorticoid. Our results identify TBC-COOH/MPS as anadvanced in situ prepared nanoformulation and encourage its further investigation for a potential localglucocorticoid therapy