Ultra-high-Q resonances in plasmonic metasurfaces.

Plasmonic nanostructures hold promise for the realization of ultra-thin sub-wavelength devices, reducing power operating thresholds and enabling nonlinear optical functionality in metasurfaces. However, this promise is substantially undercut by absorption introduced by resistive losses, causing the metasurface community to turn away from plasmonics in favour of alternative material platforms (e.g.

Hydrogen Atom Transfer from Benzyl Alcohols to -Oxyl Radicals. Reactivity Parameters.

A model for predicting the rate constants of hydrogen atom transfer (HAT) from the α-C-H bond of -substituted benzyl alcohols to -oxyl radicals was proposed. To quantify the factors governing the reactivity of both -oxyl radicals and benzyl alcohols, multivariate regression analysis was performed using various combinations of reactivity parameters. The analysis was based on a 2D array of 35 HAT reactions, the rate constants of which span 4 orders of magnitude.

GERHARD HANSEN VS. ALBERT NEISSER: PRIORITY FOR THE INVENTION OF MYCOBACTERIUM LEPRAE AND PROBLEMS OF BIOETHICS.

The article is interdisciplinary in nature and covers a wide range of issues in the history of medicine, morality and bioethics. Biographies of the Norwegian microbiologist G. Hansen and the German doctor, biologist, syphilologist A.

Scope and limitations of biocatalytic carbonyl reduction with white-rot fungi.

The reductive activity of various basidiomycetous fungi towards carbonyl compounds was screened on an analytical level. Some strains displayed high reductive activities toward aromatic carbonyls and aliphatic ketones. Utilizing growing whole-cell cultures of Dichomitus albidofuscus, the reactions were up-scaled to a preparative level in an aqueous system.

Evaluation of Reducing Ability and Antioxidant Activity of Fruit Pomace Extracts by Spectrophotometric and Electrochemical Methods.

The component profiles of apricot, grape, and black currant pomace extracts have been analyzed using HPLC coupled to diode-array detection and tandem mass spectrometry (HPLC-DAD-MS). The predominant components in grape, apricot, and black currant pomace extracts were phenolic acids and flavonols. The redox behavior of apricot, black currant, and grape pomace water extracts was evaluated by means of cyclic voltammetry.

Hyperpolarizability of Plasmonic Meta-Atoms in Metasurfaces.

Plasmonic metasurfaces are promising as enablers of nanoscale nonlinear optics and flat nonlinear optical components. Nonlinear optical responses of such metasurfaces are determined by the nonlinear optical properties of individual plasmonic meta-atoms. Unfortunately, no simple methods exist to determine the nonlinear optical properties (hyperpolarizabilities) of the meta-atoms hindering the design of nonlinear metasurfaces.

Detection of oriented fractal scaling components in anisotropic two-dimensional trajectories.

We propose a novel class of mixed fluctuations with different orientations and fractal scaling features as a model for anisotropic two-dimensional (2D) trajectories hypothesized to appear in complex systems. Furthermore, we develop the oriented fractal scaling component analysis (OFSCA) to decompose such mixed fluctuations into the original orientation components. In the OFSCA, the original orientations are detected based on the principle that the original angles are orthogonal to the angles with the minimum and maximum scaling exponents of the mixed fluctuations.

Development and Experiments of an Electrothermal Driven Deep-Sea Buoyancy Control Module.

Due to the extremely high pressures in the deep sea, heavy ballast tanks and pressure compensating hydraulic tanks are typically required to support the operation of classic buoyancy controls. Buoyancy control systems driven by phase-change materials (PCM) have unique advantages over conventional hydraulically actuated buoyancy control systems, including high adaptability for deep-sea exploration and simple, lightweight, and compact structures. Inspired by this, a buoyancy control module (BCM) was designed with flexible material as the shell.

Quorum Sensing System in Strain Identified by Genome Sequence Analysis.

This study is a bioinformatics assay on the microbial genome of . The study focuses on the problem of quorum sensing as a result of adverse factors such as chemotherapy and antibiotic therapy. In patients with severe intestinal diseases, two strains of microorganisms were identified that were distinguished as new.

Role of the paramagnetic donor-like defects in the high n-type conductivity of the hydrogenated ZnO microparticles.

The magnetic and electronic properties of the hydrogenated highly conductive zinc oxide (ZnO) microparticles were investigated by electron paramagnetic resonance (EPR) and contactless microwave (MW) conductivity techniques in the wide temperature range. The EPR spectra simulation allowed us to resolve four overlapping EPR signals in ZnO microparticles. The Lorentzian EPR line with isotropic g-factor 1.

Efficacy of Combination Neoadjuvant Chemotherapy and Regional Inductive Moderate Hyperthermia in the Treatment of Patients With Locally Advanced Breast Cancer.

Purpose: To evaluate the efficacy of neoadjuvant chemotherapy in combination with regional inductive moderate hyperthermia for patients with locally advanced breast cancer.

Patients And Methods: 200 patients with stage IIB-IIIA breast cancer received neoadjuvant chemotherapy (control group, n = 97) or chemotherapy combined with hyperthermia (experimental group, n = 103). Inductive hyperthermia was set at 27.

Detection of breast cancer presenting as a mass in women with dense breasts - digital breast tomosynthesis versus full-field digital mammography.

Aim: To evaluate the sensitivity and specificity of digital breast tomosynthesis compared with full-field digital mammography in detection of breast cancer presenting as a mass in women with dense breasts. Маterials and Methods: This study included 347 asymptomatic and symptomatic patients with dense breasts who underwent full-field digital mammography, digital breast tomosynthesis and hand-held full breast ultrasound. 57 core-needle biopsies were performed.

A Framework to Assess the Information Dynamics of Source EEG Activity and Its Application to Epileptic Brain Networks.

This study introduces a framework for the information-theoretic analysis of brain functional connectivity performed at the level of electroencephalogram (EEG) sources. The framework combines the use of common spatial patterns to select the EEG components which maximize the variance between two experimental conditions, simultaneous implementation of vector autoregressive modeling (VAR) with independent component analysis to describe the joint source dynamics and their projection to the scalp, and computation of information dynamics measures (information storage, information transfer, statistically significant network links) from the source VAR parameters. The proposed framework was tested on simulated EEGs obtained mixing source signals generated under different coupling conditions, showing its ability to retrieve source information dynamics from the scalp signals.

The scientific and pedagogical heritage of doctor N.I. Pirogov.

Objective: The aim: was toanalyze the scientific and pedagogical heritage of N.I. Pirogov, which remains relevant in the modern medical and pedagogical community, and opens new little-known pages of the scientific, pedagogical and medical activity of the doctor.

Temozolomide in glioblastoma treatment: 15-year clinical experience and analysis of its efficacy.

Aim: To analyze retrospectively the efficacy of temozolomide (TMZ) in various treatment regimens in glioblastoma patients accounting for varying parameters of their treatment.

Materials And Methods: 302 glioblastoma patients were treated at the State Institution "Romodanov Institute of Neurosurgery of the National Academy of Medical Sciences of Ukraine" from 2003 through 2017. All the patients were surgically treated.

Hydrodynamic Noise of Pulsating Jets through Bileaflet Mechanical Mitral Valve.

Experimental research results of hydrodynamic noise of pulsating flow through a bileaflet mechanical mitral valve are presented. The pulsating flow of pure water corresponds to the diastolic mode of the cardiac rhythm heart. The valve was located between the model of the left atrium and the model of the left ventricle of the heart.

Can Abbe theory of image formation be improved ?

Abbe theory of image formation can be expanded from two-dimensional to three-dimensional space. It has to consider an optical system that forms an image of a grating in an object space. It is possible to introduce various inclinations of this grating relatively the optical axis round the axis in the object plane that is parallel to its slits.

Crystal structure and Hirshfeld surface analysis of 6-benzoyl-3,5-di-phenyl-cyclo-hex-2-en-1-one.

In the title compound, CHO, the central cyclo-hexenone ring adopts an envelope conformation. The mean plane of the cyclo-hexenone ring makes dihedral angles of 87.66 (11) and 23.

Kinetics of -oxyl Radicals' Decay.

-oxyl radicals of various structures were generated by oxidation of corresponding -hydroxy compounds with iodobenzene diacetate, [bis(trifluoroacetoxy)]iodobenzene, and ammonium cerium(IV) nitrate in acetonitrile. The decay rate of -oxyl radicals follows first-order kinetics and depends on the structure of -oxyl radicals, reaction conditions, and the nature of the solvent and oxidant. The values of the self-decay constants change within 1.

Structural phase transformations in annealed Pt/Mn/Fe trilayers.

Thermally-activated phase transitions in Pt/Mn/Fe thin films were investigated by a combination of x-ray diffraction, transmission electron microscopy, secondary neutral mass spectrometry depth profiling, atomic force microscopy, and magnetic properties measurements. Post-annealing was carried out in vacuum to different temperatures up to 620 °C. Initially, at temperatures between 280 °C-450 °C first L1-MnPt is formed at the Mn/Pt interface followed by the most likely formation of metastable bcc FePt, which gets transformed by further annealing to fcc FePt and eventually to chemically ordered L1-FePt.

[MEDICAL INSURANCE AS A METHOD OF SOCIAL PROTECTION OF CITIZENS IN UKRAINE].

The article is focused on studying social and economic conditions affecting the choice of the type of health insurance. The objective of the article is to justify the type of medical insurance as the method of social protection of citizens in Ukraine, where the access of the population to medical care is the key condition. The methodology of this study includes traditional and special methods of scientific cognition: synthesis, analysis, induction, deduction, generalization, proving, structural and functional, formal and legal, comparative, theoretical and prognostic.

Photochemical [2 + 2] Cycloaddition of Alkenyl Boronic Derivatives: An Entry into 3-Azabicyclo[3.2.0]heptane Scaffold.

The synthesis of 3-azabicyclo[3.2.0]heptyl boropinacolates and trifluoroborates the [2 + 2] photocycloaddition of the corresponding alkenyl boronic derivatives and maleimides or maleic anhydride is described.

Effective Medium Theory for the Elastic Properties of Composite Materials with Various Percolation Thresholds.

It is discussed that the classical effective medium theory for the elastic properties of random heterogeneous materials is not congruous with the effective medium theory for the electrical conductivity. In particular, when describing the elastic and electro-conductive properties of a strongly inhomogeneous two-phase composite material, the steep rise of effective parameters occurs at different concentrations. To achieve the logical concordance between the cross-property relations, a modification of the effective medium theory of the elastic properties is introduced.

Twisting and Turning the Sulfonamide Bond: A Synthetic, Quantum Chemical, and Crystallographic Study.

Structural restriction of the sulfonamide bond was used to design sultams with abnormal geometric parameters. Based on analysis of tertiary aliphatic sulfonamides published in the Cambridge crystallographic database, Paquette's sultams (i.e.

Crystal structure and Hirshfeld surface analysis of ()-3-(benzyl-idene-amino)-5-phenyl-thia-zolidin-2-iminium bromide.

The central thia-zolidine ring of the title salt, CHNS·Br, adopts an envelope conformation, with the C atom bearing the phenyl ring as the flap atom. In the crystal, the cations and anions are linked by N-H⋯Br hydrogen bonds, forming chains parallel to the -axis direction. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H⋯H (46.