Improving municipal image as the guideline for social policy

The article is about the role of the local social policy in improving the image of the municipality. The author draws attention to the relevance of the territorial image issue. It is spoken in detail about components of the territory image and factors affecting them. It is shown that there is connection between development of social policy and improving the image characteristics of the territory. The author points out parameters which depend on social policy and determine the creation of a positive municipal image. The article is concerned with the necessity of strategic orientation of social policy in the direction of forming a positive image of the municipality.В статье анализируется роль местной социальной политики в формировании имиджа муниципального образования. Обосновывается актуальность проблемы улучшения территориального имиджа на современном этапе. Рассмотрены составляющие имиджа территории и факторы, оказывающие на них влияние. Показана взаимосвязь развития социальной сферы и улучшения имиджевых характеристик территории. Выделены параметры, зависящие от социальной политики, которые предопределяют создание положительного имиджа муниципального образования. Особое внимание уделяется взаимосвязи между внутренним и внешним имиджем территории, а также влиянию на них социальной сферы. Обоснована необходимость стратегического ориентирования социальной политики в направлении формирования благоприятного имиджа муниципального образования

Tribological and mechanical properties of lubricant filled microcapsules in thermoplastic composites

Polymeric materials with long lifetime and low frictional energy loss are frequently required for a broad range of applications. Microencapsulation of lubricating oils by in-situ polymerization (melamine-formaldehyde) and interfacial polymerization (polyurethane/polyurea) was used to obtain free-flowing powders, which can be used as additive for thermoplastic materials resulting in microcapsule-containing self-lubricating composites. The specific functionality of such composites is achieved via portioned and localised release of the lubricant in the areas of the interface, which experiences the highest degrees of stress and wear due to the friction. Friction-triggered on-demand release of the lubricating oil results in materials with higher wear resistance and potentially leading to new products with prolonged lifetime. In this study, different ratios of microcapsules were added in polyoxymethylene (POM) and polybutylterephthalat (PBT) matrices by using laboratory scale twin-screw extruder resulting in self-lubricating composite materials. The effect of such modification on the tribological and mechanical properties of the thermoplastic composites were investigated. Rotational ball on disc tests were used to investigate the wear loss and coefficient of friction for the composites with varied microcapsule concentrations. Tensile tests revealed decreased mechanical stability for the composites with higher microcapsule content regardless of microcapsule wall material composition. Addition of 5 wt.- % of encapsulated lubricant oil led to the substantial decrease of the frictional and wear coefficients. Further increase of encapsulated lubricant oil content to 10 wt.-% had a major decreasing impact on the mechanical properties, whilst the effect on the tribological performance was rather small

Microgel containers for self-healing polymeric materials: Morphology prediction and mechanism of formation

18 types of gel microparticles, composed of 3 polymer types and 6 different solvents, were prepared by interfacial polymerization and compared in a systematic way with respect to their structure and function. Three types of morphologies, specific for each polymer-solvent pair, were observed: core-shell, multicompartment and compact. The morphology was found to be a direct consequence of the specific polymer-solvent interactions and can be, in most cases, predicted on the basis of simple swelling experiments with a chosen polymer in the solvent. Further, the Hansen Solubility Parameters approach was applied to the investigated systems enabling a reliable morphology prediction of microgel particles made of any polymer/solvent combination with known solubility parameters (spheres). The mechanisms responsible for the formation of particles with different morphologies are also discussed

Analysis of risk factors for gestational hypertensive disorders

The purpose of the study is a comparative analysis of risk factors for preeclampsia, with an impact on the outcome of pregnancy and childbirth, and an assessment of the effectiveness of prevention of hypertension.Цель исследования - сравнительный анализ факторов риска возникновения преэклампсии, с влиянием на исход беременности и родов, оценка эффективности профилактики артериальной гипертензии

Gelatin microgels as a potential corrosion inhibitor carriers for self-healing coatings: Preparation and codeposition: Gelatin microgels as carriers for self-healing coatings

Co-deposition of a coating with capsules containing a corrosion inhibitor is one of the methods to protect the material surface against corrosion. This generation of coatings can be regenerated in response to mechanical or chemical damage. The paper presents a method for preparing gelatin microgels that can be eco-friendly corrosion inhibitor reservoir. The influence of temperature, stirring rate, an addition of surfactants (ionic and non-ionic) on microgel quality has been studied. It has been found that the microgels obtained at 80 °C from the solution containing non-ionic surfactant at concentration below its critical micelle concentration are the most stable and less polydisperse one. As a proof of concept, a Ni-P\gelatin microgels hybrid coating has been obtained by electroless method

Towards microcapsules with improved barrier properties

Microencapsulation is the generic term for numerous technologies, which are often used when the release rate of an active substance in a medium has to be controlled and/or contact between the active substance and the medium has to be prevented. This is achieved by wrapping the tiny particles or droplets of the active substance (capsule core) with a thin layer, or membrane, of another material (capsule shell). The permeability of the membrane determines whether, how fast and under which conditions the active material will be released and/or the components of the medium will enter the inner part of the capsule. Insofar as application is concerned, premature release of an active substance from microcapsules during storage is a very common problem. Prevention of diffusion of an active component or components of the outer medium through the capsule membrane is a complex challenge, which so far cannot be considered as solved. This review briefly covers the theoretical aspects of release kinetics from microcapsules and discusses how such parameters as capsule average size, capsule shell thickness as well as the chemical composition of active material and medium can influence the release profiles. All theoretical considerations are based on the dissolution-diffusion mechanism classically used for the explanation of diffusion trough flat membranes/films. In the second part of the manuscript it is discussed, which strategies have been used for the improvement of the barrier properties of microcapsules up to date and to which extent those strategies were successful