High power diode laser surface glazing of concrete

This present work describes the utilisation of the relatively novel high power diode laser (HPDL) to generate a surface glaze on the ordinary Portland cement (OPC) surface of concrete. The value of such an investigation would be to facilitate the hitherto impossible task of generating a durable and long-lasting surface seal on the concrete, thereby extending the life and applications base of the concrete. The basic process phenomena are investigated and the laser effects in terms of glaze morphology, composition and microstructure are presented. Also, the resultant heat affects are analysed and described, as well as the effects of the shield gases, O2 and Ar, during laser processing. HPDL glazing of OPC was successfully demonstrated with power densities as low as 750 W cm-2 and at scanning rates up to 480 mm min-1. The work showed that the generation of the surface glaze resulted in improved mechanical and chemical properties over the untreated OPC surface of concrete. Both untreated and HPDL glazed OPC were tested for pull-off strength, rupture strength, water absorption, wear resistance and corrosion resistance. The OPC laser glaze exhibited clear improvements in wear, water sorptivity, and resistance (up to 80% concentration) to nitric acid, sodium hydroxide and detergent. Life assessment testing revealed that the OPC laser glaze had an increase in actual wear life of 1.3 to 14.8 times over the untreated OPC surface of concrete, depending upon the corrosive environment

Дослідження взаємозв’язків між вмістом основних груп БАР у настойці собачої кропиви (Leonurus cardiaca) трави та її психотропною активністю

Topicality. Motherwort herb tincture is one of the most popular herbal remedies of sedative action. The disadvantage of this medicines is chemical composition volatility, and as a consequence, pharmacodynamics. Therefore, it is advisable to investigate BAS groups of Motherwort herb tincture having the greatest effect on its psychotropic activity and in the future to standardize the medicines precisely with their content.Aim. To determine the relationship between the main BAS groups content in Motherwort herb (Leonurus cardiaca) and its psychotropic activity in order to establish the parameters of this medicine standardization.Materials and methods. The object of the study was Motherwort herb tincture (series 15.04.16, produced at LTD “Pharmaceutical factory”, Zhytomyr region., Stanishevka v.) and the main BAS groups complexes of isolated from. Determination of hydroxycinnamic derivatives acid, flavonoids and the sum of phenolic compounds, iridoids were carried out by spectrophotometric method and HPLC method. The psychotropic activity of the research objects were studied in the open field test in the NUPh Central Research Laboratory.Results and discussion. As a result of the chemical analysis of the tincture and obtained BAS complexes, 2 flavonoids (routine and catechin), 3 hydroxycinnamic acids (chlorogenic, coffeic and rosemarinic), 2 iridoids were identified and their quantitative contents were determined. It was established that Motherwort herb tincture and its components significantly decreases the sum of all types of psychotropic activity, mainly due to the reduction of motor activity. At the same time, it also shows a tendency to decrease the approximate research activity, indicating its sedative effect. The largest sedative activity in the smallest doses a complex of iridoids demonstrated. It should be taken into the account when this medicine is standardized.Conclusions. The study of qualitative composition and quantitative content of the main BAS groups (flavonoids, hydroxycinnamic acids, iridoids) in the Motherwort herb tincture and dry extracts based on it. The most sedative activity was shown by substances rich in iridoids, indicating the appropriateness of standardizing  Motherwort herb tincture on the content of this particular BAS group.Актуальность. Настойка травы пустырника – один из самых популярных растительных препаратов седативного действия. Недостатком этого лекарственного препарата является непостоянство химического состава и как следствие, фармакодинамики. Поэтому целесообразно исследовать, какие именно группы БАВ настойки пустырника оказывают наибольшее влияние на ее психотропную активность и в дальнейшем проводят стандартизацию препарата именно по их содержанию.Цель исследования. Определить взаимосвязи между содержанием основных групп БАВ в настойке пустырника (Leonurus cardiaca) травы и ее психотропной активностью для установления параметров стандартизации этого препарата.Материалы и методы. Объектом исследования была настойка пустырника промышленного производства (серия 15.04.16, ООО «Фармацевтическая фабрика», Житомирская обл., с. Станишевка) и комплексы основных групп БАВ, выделенных из нее. Определение производных гидроксикоричных кислот, флавоноидов, суммы фенольных соединений, иридоидов проводили спектрофотометрическим методом и методом ВЭЖХ. Психотропную активность объектов исследования изучали в тесте открытого поля в Центральной научно-исследовательской лаборатории НФаУ.Результаты и их обсуждение. В результате химического анализа настойки и полученных комплексов БАВ было идентифицировано 2 флавоноида (рутин и катехин), 3 гидроксикоричные кислоты (хлорогеновую, кофейную и розмариновую), 2 иридоида и установлено их количественное содержание. Установлено, что настойка пустырника и ее компоненты статистически значимо снижают сумму всех видов психотропной активности, в основном за счет уменьшения двигательной активности. При этом она также обнаруживает тенденцию к снижению ориентировочно-исследовательской активности, что указывает на ее седативное действие. Наибольшую седативную активность в наименьшей дозе показал комплекс иридоидных соединений, что нужно учитывать при стандартизации этого лекарственного средства.Выводы. Проведено исследование качественного состава и количественного содержания основных групп БАВ (флавоноидов, гидроксикоричных кислот, иридоидов) в настойке пустырника и сухих экстрактах на ее основе. Наибольшую седативную активность показали субстанции, богатые иридоидами, что указывает на целесообразность стандартизации настойки пустырника по содержанию именно этой группы БАВ.Актуальність. Настойка трави собачої кропиви – один з найбільш популярних рослинних препаратів седативної дії. Недоліком цього лікарського препарату є непостійність хімічного складу і як наслідок, фармакодинаміки. Тому доцільно дослідити, які саме групи БАР настойки собачої кропиви чинять найбільший вплив на її психотропну активність та в подальшому проводити стандартизацію препарату саме за їх вмістом.Мета дослідження. Визначити взаємозв’язки між вмістом основних груп БАР у настойці собачої кропиви (Leonurus cardiaca) трави та її психотропною активністю для встановлення параметрів стандартизації цього препарату.Матеріали та методи. Об’єктами дослідження були настойка собачої кропиви промислового виробництва (серія 15.04.16, ТОВ «ДКП «Фармацевтична фабрика», Житомирська обл., с. Станишівка) та комплекси основних груп БАР, виділених з неї. Визначення похідних гідроксикоричної кислоти, флавоноїдів та суми фенольних сполук, іридоїдів проводили спектрофотометричним методом та методом ВЕРХ. Психотропну активність об’єктів дослідження вивчали у тесті відкритого поля у Центральній науково-дослідній лабораторії НФаУ.Результати та їх обговорення. В результаті хімічного аналізу настойки та одержаних комплексів БАР було ідентифіковано 2 флавоноїди (рутин та катехін), 3 гідроксикоричні кислоти (хлорогенову, кавову та розмаринову), 2 іридоїдні сполуки та встановлено їх кількісний вміст. Встановлено, що настойка собачої кропиви та її компоненти статистично значущо знижують суму всіх видів психотропної активності, в основному за рахунок зменшення рухової активності. При цьому вона також виявляє тенденцію до зниження орієнтовно-дослідницької активності, що вказує на її седативний вплив. Найбільшу седативну активність у найменшій дозі показав комплекс іридоїдних сполук, що потрібно враховувати при стандартизації цього лікарського засобу.Висновки. Проведено дослідження якісного складу та кількісного вмісту основних груп БАР (флавоноїдів, гідроксикоричних кислот, іридоїдів) у настойці собачої кропиви та сухих екстрактах на її основі. Найбільшу седативну активність показали субстанції, багаті на іридоїди, що вказує на доцільність стандартизації настойки собачої кропиви за вмістом саме цієї групи БАР

Synthesis of Layered Organic-Inorganic Nanocomposites of Zinc and Copper by Laser Ablation in Liquid

The experimental data of studies of layered organic-inorganic nanocomposites (()-Zn(OH)2+DS) and (Cu2(OH)3+DS) which were produced in the result ablation of zinc and copper in aqueous solutions of surfactants—dodecyl sodium sulfate (SDS) and sodium bis-ethylhexyl succinate (AOT)—are presented. Dependence of the formation dynamics of these composites on an exposure time of radiation and on an aging time of colloids was studied by the absorption spectroscopy, by X-ray diffraction, by scanning electron (SEM), and atomic force microscopy (AFM). Composite (Cu2(OH)3+DS) with bilayered structure was produced by method of laser ablation of the copper metal target in liquid for the first time

Whole exome sequencing links dental tumor to an autosomal-dominant mutation in ANO5 gene associated with gnathodiaphyseal dysplasia and muscle dystrophies

Tumors of the jaws may represent different human disorders and frequently associate with pathologic bone fractures. In this report, we analyzed two affected siblings from a family of Russian origin, with a history of dental tumors of the jaws, in correspondence to original clinical diagnosis of cementoma consistent with gigantiform cementoma (GC, OMIM: 137575). Whole exome sequencing revealed the heterozygous missense mutation c.1067G \u3e A (p.Cys356Tyr) in ANO5 gene in these patients. To date, autosomal-dominant mutations have been described in the ANO5 gene for gnathodiaphyseal dysplasia (GDD, OMIM: 166260), and multiple recessive mutations have been described in the gene for muscle dystrophies (OMIM: 613319, 611307); the same amino acid (Cys) at the position 356 is mutated in GDD. These genetic data and similar clinical phenotypes demonstrate that the GC and GDD likely represent the same type of bone pathology. Our data illustrate the significance of mutations in single amino-acid position for particular bone tissue pathology. Modifying role of genetic variations in another gene on the severity of the monogenic trait pathology is also suggested. Finally, we propose the model explaining the tissue-specific manifestation of clinically distant bone and muscle diseases linked to mutations in one gene

The development and characteristics of a hand-held high power diode laser-based industrial tile grout removal and single-stage sealing system

As the field of laser materials processing becomes ever more diverse, the high power diode laser (HPDL) is now being regarded by many as the most applicable tool. The commercialisation of an industrial epoxy grout removal and single-stage ceramic tile grout sealing process is examined through the development of a hand-held HPDL device in this work. Further, an appraisal of the potential hazards associated with the use of the HPDL in an industrial environment and the solutions implemented to ensure that the system complies with the relevant safety standards are given. The paper describes the characteristics and feasibility of the industrial epoxy grout removal process. A minimum power density of approximately 3 kW/cm2 was found to exist, whilst the minimum interaction time, below which there was no removal of epoxy tile grout, was found to be approximately 0.5 s. The maximum theoretical removal rate that may be achievable was calculated as being 65.98 mm2/s for a circular 2 mm diameter beam with a power density of 3 kW/cm2 and a traverse speed of 42 mm/s. In addition, the characteristics of the single-stage ceramic tile grout sealing are outlined. The single-stage ceramic tile grout sealing process yielded crack and porosity free seals which were produced in normal atmospheric conditions. Tiles were successfully sealed with power densities as low as 550 W/cm2 and at rates of up to 420 mm/min. In terms of mechanical, physical and chemical characteristics, the single-stage ceramic tile grout was found to be far superior to the conventional epoxy tile grout and, in many instances, matched and occasionally surpassed that of the ceramic tiles themselves

Formation of value attitude to health at students in the process of spiritual and moral education

The article considers the possibilities of forming a value-based attitude to health among students of adolescents by means of spiritual and moral education, the condition of which is their personal resistance to negative dependenciesВ статье рассмотрены возможности формирования средствами духовно-нравственного воспитания у обучающихся подросткового возраста ценностного отношения к здоровью, условием которого выступает их личностная устойчивость к негативным зависимостя

Label-free electrochemical monitoring of DNA ligase activity

This study presents a simple, label-free electrochemical technique for the monitoring of DNA ligase activity. DNA ligases are enzymes that catalyze joining of breaks in the backbone of DNA and are of significant scientific interest due to their essential nature in DNA metabolism and their importance to a range of molecular biological methodologies. The electrochemical behavior of DNA at mercury and some amalgam electrodes is strongly influenced by its backbone structure, allowing a perfect discrimination between DNA molecules containing or lacking free ends. This variation in electrochemical behavior has been utilized previously for a sensitive detection of DNA damage involving the sugar-phosphate backbone breakage. Here we show that the same principle can be utilized for monitoring of a reverse process, i.e., the repair of strand breaks by action of the DNA ligases. We demonstrate applications of the electrochemical technique for a distinction between ligatable and unligatable breaks in plasmid DNA using T4 DNA ligase, as well as for studies of the DNA backbone-joining activity in recombinant fragments of E. coli DNA ligase

Observation of Lambda H-4 hyperhydrogen by decay-pion spectroscopy in electron scattering

At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the ground-state masses of Lambda-hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at p_pi ~ 133 MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen Lambda H-4 -> He-4 + pi-, stopped inside the target. Its binding energy was determined to be B_Lambda = 2.12 +- 0.01 (stat.) +- 0.09 (syst.) MeV with respect to the H-3 + Lambda mass

PCR Results of Vector and Carrier Investigations for the Presence of Tick-Borne Borreliosis, Human Monocytic Ehrlichiosis, and Human Granulocytic Anaplasmosis Agents in Natural Foci of the Rostov Region

Objective of the study is to detect the circulation of the agents of ixodic tick-borne borreliosis (ITB), human monocytic ehrlichiosis (HME), and human granulocytic anaplasmosis (HGA) in samples collected from carriers and vectors of transmissible tick-borne infections using PCR-assay. Materials and methods. Field material was studied in PCR for evaluating the rate of infection by causative agents of tick-borne infections (tick-borne borrelioses, ehrlichioses, anaplasmosis) in combined natural foci on the territory of the Rostov Region. Results and conclusions. The data obtained during epizootiological investigations carried out in 21 administrative districts and 10 cities of the Rostov Region between 2014 and 2016 were used in the study. The results were indicative of spontaneous infection in ixodic ticks by ITB causative agent on the territory of the Rostov Region, as well as of presence of corresponding natural focus. Since 2013 the activity of different components of ITB natural focus was confirmed by the detection and official registration of patients. Moreover, in the Rostov Region for the first time ever the circulation of HME and HGA causative agents was recorded and territorially combined foci of HME and HGA with ITB were identified. The results obtained allow assuming the genesis of a focus of ixodic tick-borne borreliosis and monocytic and granulocytic ehrlichioses owing to annual expansion of the areal of ticks, infected by these pathogens, and animals on which the ticks are feeding. PCR-analysis is of significant value for assessment of spread of causative agents of the “tick-borne” infections in the Rostov Region, forecasting of epidemiological situation, as well as implementation of preventive measures in the region