bluuebunny/crossref_metadata_2025 huggingface dataset:
PETROLOGICAL, MINERALOGICAL AND GEOCHEMICAL DATA FROM THE EOHELLENIC OPHIOLITIC NAPPE IN THE ISLAND OF SKYROS, GREECE
Authors: Karkalis C. , Magganas A. , Koutsovitis P.
Published: July 2017

The ophiolite of Skyros mainly consists of serpentinized harzburgites, gabbroic rocks, dolerites, tholeiitic basaltic lavas, rodingites, as well as ophicalcites. This ophiolitic sequence comprises of an ophiolitic mélange of pre-Upper Cretaceous age belonging to the Eohellenic nappe, has been affected by low to moderate metamorphic and metasomatic processes. Their mineral chemistry as well as their whole rock chemistry suggests that these ophiolitic rocks are associated with supra-subduction related processes. The presence of vesuvianite crystals in rodingites, as well as the occurrence of relict spinels within serpentinitic rocks, further confirms this assumption. Geochemical and petrological comparison between Skyros ophiolitic rocks and similar rocks of the Eohellenic nappe in East Thessaly and other N. Sporades islands, reveal that they all share many petrogenetical features. These eastcentral Greece Eohellenic ophiolites, and the ophiolitic rocks of the upper tectonic unit of the Attico-Cycladic Zone may possibly form an elongated ophiolitic zone associated to the hanging wall of the North Cycladic Detachment System
PETROGENETIC SIGNIFICANCE OF SPINELS FROM SERPENTINISED PERIDOTITES FROM THE VERIANAOUSA OPHIOLITE
Authors: Rogkala A. , Petrounias P. , Tsikouras B. , Hatzipanagiotou K.
Published: July 2017

The Veria-Naousa ophiolitic complex represents a dismembered ophiolite unit, which is superimposed on a basement consisting of rocks belonging to the Pelagonian and Axios (Almopias subzone) isopic zones in northern Greece. Mantle peridotites are composed of variably serpentinised lherzolite and harzburgite intruded by a sparse network of pyroxenitic dykes. The serpentinised lherzolite and harzburgite contain Alspinels (Cr#=38.83-42.52 and Mg#=58.94-64.77), Cr-spinels (Cr#=43.37-64.92 and Mg#=49.20-58.66) and magnesiochromites (Cr#=53.93 57.13 and Mg#=55.73- 61.71). All of them display commonly richer-in-Cr cores rimmed by secondary ferrian chromite and magnetite. Whole-rock geochemicall compositions and primary spinel chemical composition of these peridotites are analogous to peridotites that formed in a suprasubduction zone. Ιt is supported that the Mantle peridotites of the VeriaNaousa ophiolitic complex formed in a back-arc basin
MINERALOGICAL AND GEOCHEMICAL CHARACTERIZATION OF ZEOLITES IN ALBANIAN OPHIOLITIC PLAGIOGRANITES
Authors: Goga Beqiraj E. , Muller F. , Beqiraj A.
Published: July 2017

The plagiogranites, that represent the uppermost part of the plutonic complex of the Albanian ophiolites, are intensively altered. They crop out in the north - easternsectors of the Albanian ophiolitic complex presenting intrusive contacts with volcanic and gabbroic rocks. The zeolite, that is a typically secondary mineral, has filled thin veins and/or small vesicles of the rock. From the XRD, EMPA and microscopic analyses it is concluded that this zeolite belongs to the laumontite - leonhardite (LAU) series.
ON THE RELATIVELY COMPOSITIONAL HOMOGENEITY OF ALBANIAN EASTERN OPHIOLITIC BELT
Authors: Çina Α.
Published: July 2017

Ophiolitic formation of Albanides, named as Mirdita zone, represents a compactsegment of oceanic lithosphere of Middle-Upper Jurassic. Based on petrographic,geochemical and metalogenical features two types of belts are distinguished: westernMORB and eastern SSZ types. In fact, structural and geological units as well as manyother elements have shed light on lack of a sharp separation between the two belts.Recent investigations have evidenced that different ultramafic massifs of westernophiolitic formation, represent an evident variation of their composition fromharzburgite to lherzolitic -types. This composition reflects a different grade of partialmelting of upper mantle. Peridotites show a high variability, from 0.3 - 3.8 wt.%Al2O3, varying from small to highly extreme depleted peridotite.On the contrary, Albanian eastern belt, it seems to be formed by a more homogeneoushartzburgitic mantle.Detailed petrologic and metallogenic investigations have evidenced that this beltchanges also from one massif to another, naturally at a smaller level, therefore it iseasier to be named relatively homogeneous. It is distinguished by a higher meltingdegree, chiefly of hartzburgitic-type, characterized by whole and thick ultramaficsection, as well as by metalogenic variety, mostly of metallurgic-type of chromitemineralization. It is supposed that rock-forming and mineraluzation processes havebeen developed not uniformly along the ophiolitic belt.
MUDPOTS AT STEFANOS HYDROTHERMAL CRATER OF NISYROS VOLCANO. AN INSIGHT AT THE HYDROTHERMAL PROCESSES OF AN ACTIVE VOLCANO
Authors: Kanellopoulos C. , Xirokostas N.
Published: July 2017

On Nisyros island as a result of the volcanic activity and active tectonic, a hydrothermal system develops and it is expressed by 5 types of surface manifestations: i) thermal springs, ii) fumaroles iii) hydrothermal craters, iv) hot grounds and v) mudpots. In general, a mudpot could be described as an acidic hot spring and fumarole with limited water which it is formed in high temperature geothermal areas. Water sample and depositions of mudpots collected, analyzed and studied from Stefanos hydrothermal crater, which is the only site on Nisyros Island, where mudpots occur. Mudpots water is very acidic (pH=2.4), with high sulfate concentration (1375mg/L), due to the H2S(gas) and temperature near the boiling point. As a result, elemental sulfur is found inside the depositions alongside with products of the hydrothermal alteration of the surrounding rocks. In the water and in the depositions were found high concentrations in several elements (e.g. in water: 55mg/L Fe; 19.5mg/L Zn, in depositions: 430mg/Kg Pb; 72mg/Kg Cu; 60mg/Kg Cr) reflecting the alterations processes which are taking place.
ASSESSMENT ON HYDROTHERMAL PARTICLE CHEMISTRY FROM A SHALLOW VENTING SYSTEM OFFSHORE KOS, AEGEAN SEA
Authors: Megalovasilis P.
Published: July 2017

Shallow submarine hydrothermal vents along Hellenic Volcanic Arc transfer significant quantities of particles enriched in basic metals. Fluids collected by scuba diving from two shallow hydrothermal venting areas on Kos Island in the Aegean Sea in East Mediterranean. Samples were filtrated and membrane filters leached with a mixture of acids. Chemical analysis performed in suspended particles for Fe, Mn, Cu, Pb, Cd, Ca, Ba, Sr, Li, Al and Si. The suspended particulate matter (SPM) flux varied from 0.93 to 8.64 mg/l and between 0.21 and 20.94 mg/l in two sites. Metal/Al ratios also vary significantly within a short distance. The pH of hydrothermal waters was from 5.50 to 5.95 in Kephalos Bay and from 6.09 to 6.53 in Bros Thermi suggesting gases CO2 and H2S may control pH values. Particles were dominated by Fe, Ca, Si and Al and strongly enriched in Mn, Cu, Pb and Ba. Three geochemical groups were identified being associated with distinct hydrothermal processes concerning sulphide minerals, carbonate substrate and deeper Al-Silicate rock basement
MARIALITIC SCAPOLITE OCCURENCES FROM THE KIMMERIA-LEFKOPETRA METAMORPHIC CONTACT, XANTHI (N. GREECE)
Authors: Mouchos E. , Papadopoulou L. , Williamson B.J. , Christofides G.
Published: July 2017

Emplacement of the Xanthi Plutonic Complex within the Rhodope Massif of N. Greece created an extensive metamorphic aureole around the plutonite. The aureole contains two areas of intense scapolitization in the contacts between granodiorite and biotitegneiss and between monzonite and sandstone, the latter cross-cut by andesite dykes. This paper reports the results of a mineralogical and geochemical study into the formation of the scapolites and particularly the nature of the plutonite-derived hydrothermal fluids from which scapolites were formed.
EASILY LEACHABLE RARE EARTH ELEMENT PHASES IN THE PARNASSUS-GIONA BAUXITE DEPOSITS, GREECE
Authors: Mouchos E. , Wall F. , Williamson B.J. , Palumbo-Roe B.
Published: July 2017

The Parnassus-Giona karst bauxite deposits contain significant concentrations of rare earth elements (400-500 ppm). Preliminary results from a pilot leaching study show that between 19 and 47% of rare earth elements in the bauxite are easily leachable using ion exchange agents such as ammonium sulphate.
THE KONDAROS-KATSIMOUTI INTERMEDIATESULFIDATION EPITHERMAL PB-ZN-AG-MN MINERALIZATION, WESTERN MILOS, GREECE: NEW MINERALOGICAL AND GEOCHEMICAL DATA
Authors: Papavasiliou K. , Voudouris P. , Kanellopoulos C. , Alfieris D. , Xydous S.
Published: July 2017

The metallic mineralization in Kontaros-Katsimouti area is an epithermal Pb-Zn Ag mineralization located along the NW-trending Kondaros-Katsimouti-Vani fault, NW Milos Island, Greece. It is hosted within propylitically and argillically altered dacitic flow dome and volcaniclastic sandstone and shows features typical of intermediate sulfidation deposits like colloform banding, cockade breccias and gangue adularia, Mnrich carbonates and amethystine quartz. The Kondaros-Katsimouti system evolves at higher elevation into the Vani Ag-Pb mineralization, which occurs proximal to the Vani manganese deposit. The metallic mineralogical assemblage at Kondaros-Katsimouti includes mainly galena and sphalerite and minor pyrite. Silver is present in the form of Ag-(Cd) rich tetrahedrite (up to 23.1 wt. % Ag) and polybasite included in galena. Bulk ore analyses indicate enrichment in W (up to 424 mg/kg) and Mo (up to 24 mg/kg), similarly to the other neighboring mineralizations in western Milos (e.g. Vani, TriadesGalana). This enrichment suggests a magmatic-hydrothermal contribution to the ore fluids, probably from a buried granitoid at depth. Boiling, in addition to mixing processes between magmatic- and seawater, resulted in pH increase, oxidation and temperature decrease, and resulted into ore deposition.
THE USE OF HEU-TYPE ZEOLITIC TUFF IN SUSTAINABLE AGRICULTURE: EXPERIMENTAL STUDY ON THE DECREASE OF NITRATE LOAD IN VADOSE ZONE LEACHATES
Authors: Hatzigiannakis E. , Kantiranis N. , Tziritis E. , Filippidis A. , Arampatzis G. , Tzamos E.
Published: July 2017

A HEU-type zeolitic tuff of very-high quality (88 wt.% clinoptilolite-heulandite) has been used as an additive to natural soils, aiming to reduce the produced nitrate load in leachates, following a common irrigation scheme. Zeolitic tuff has been added and mixed with agricultural soil in three different proportions (0.2, 0.4 and 0.6%) corresponding to an application of 500, 1000 and 1500 kg per acre. The control soil (without zeolitic tuff) and the three mixtures were exposed in a ten weeks experiment, in which, specific doses of irrigation water enriched in nitrates were added. Results of leachates analyses revealed that the addition of 0.2% zeolitic tuff is not effective and the mixture of soil-zeolitic tuff appears to have similar behaviour with the untreated (reference) soil sample. On the contrary, zeolitic tuff additions by 0.4% and 0.6% showed remarkable results and reduced the nitrate load of leachates by 81 and 86%, respectively. Hence, the impacts from the application of very-high quality HEUtype zeolitic tuff in agricultural soils could be rather positive towards environmental protection and rational farming, an in line with the goals and objectives of the new common agricultural policy imposed by European Union
POTENTIAL TOXIC ELEMENTS (PTES) IN GROUND AND SPRING WATERS, SOILS AND SEDIMENTS: AN INTERDISCIPLINARY STUDY IN ANTHEMOUNTAS BASIN, N. GREECE
Authors: Kazakis N. , Kantiranis N. , Kaprara M. , Mitrakas M. , Vargemezis G. , Voudouris K. , Chatzipetros A. , Kalaitzidou K. , Filippidis A.
Published: July 2017

Ground and spring waters, soils and sediments of Anthemountas basin in Northern G reece were analyzed for Potential Toxic Elements (PTEs). In total, twenty three soil and sediment samples, three groundwater (boreholes) and two spring water samples, were analyzed. Contents of Ni in soils and sediments can be as high as 2169 mg/kg. The high correlation coefficient of Ni and Cr, indicates the geogenic origin of Ni, which originates from ophiolitic rocks. Arsenic concentration ranges from 3 to 110 mg/kg in soils and sediments, with the highest contents observed in travertine. The spring waters are characterized by elevated concentrations of As (up to 235 μg/L), N a, K, Fe and Zn, indicating that hydrothermal fluids are responsible for feldspar alte ration of the Monopigado granodiorite. On the contrary, in groundwaters, As conten ts are low (up to 18 μg/L). Electrical resistivity tomographies performed around the groundwater boreholes, revealed the presence of normal faults, locally allowing the mixing of geothermal fluids with the shallow porous aquifer (SPA). The presence of As in the SPA is probably due to inputs from geothermal waters through normal faulting.
ANTIMONY FIXATION IN SOLID PHASES AT THE HYDROTHERMAL FIELD OF KOLUMBO SUBMARINE ARC-VOLCANO (SANTORINI): DEPOSITION MODEL AND ENVIRONMENTAL IMPLICATIONS
Authors: Kilias S.P. , Gousgouni M. , Godelitsas A. , Gamaletsos P. , Mertzimekis T.J. , Nomikou P. , Argyraki A. , Goettlicher J. , Steininger R. , Papanikolaou D.
Published: July 2017

Antimony, an emergent global contaminant, that is hydrothermally discharged along with other epithermal metals(-loids) (Au, As, Hg, Ag, Tl, Ag) onto Kolumbo volcano’s shallow (<500 m water depth) crater seabed, is fixed either in pyrite, orpiment-like As-sulfides, and ferrihydrite-like Fe-oxy(hydro)oxides, or forms independent Pb(Zn)- Sb sulfosalts, of layered Sb-rich (up to 2.2 wt%) chimneys. High concentrations of Sb (≤ 27.2 wt%) are found in early colloform chemically-zoned hydrothermal pyrite, and later orpiment (As2S3)-type As sulfide phases(≤16.09 wt %), along individual micronscale growth zones. Antimony in pyrite may occur in the relatively more toxic trivalent (or lower valence) (Sb3+) rather than pentavalent (Sb5+) forms. Lead (Pb) always occurs with Sb in growth zones where the abundances of Sb and Pb vary inversely with Fe and S, suggesting that Sb and Pb occur either as homogeneously distributed sulfosalt nanoparticles of Sb and Pb and/or lattice bound trace elements. These findings indicate the solid phases that fix Sb on the seafloor are crucial for high- grade concentration during shallow-water hydrothermal polymetallic mineralization, and reducing the high hydrothermal flux of this notorious environmental toxin to seawater, near the fishing area of Santorini that is also one of the most popular tourist places in the world.
GEOCHEMICAL MODELING FOR THE ASSESSMENT OF THE CO2 STORAGE POTENTIAL IN THE MESOHELLENIC TROUGH, NW GREECE
Authors: Koukouzas N. , Kypritidou Z. , Purser G. , Rochelle C.A. , Vasilatos C.
Published: July 2017

Sandstone of the Pentalofos formation from the Mesohellenic Trough was examined as a potential reservoir for CO2 sequestration. Experiments were carried out into batch reactors for 6 months by mixing a simplified porewater solution saturated with CO2 (150 bar, 70oC) with crushed sandstone. The sandstone is mainly composed of carbonates, feldspars and quartz, and secondly of clays and phyllosilicates. Chemical analysis of aqueous samples showed an increase in the concentration of dissolved ions as the experiment progressed. Geochemical kinetic models that were constructed using the PHREEQC geochemical code showed that the fluid chemistry is controlled by carbonate and feldspar dissolution, clay and quartz precipitation and cation exchange reactions. The proposed models were also used to estimate the future changes in mineralogy of the sandstone in order to evaluate its suitability as a CO2 reservoir.
HEAVY METALS IN URBAN PARK SOILS FROM ATHENS, GREECE
Authors: Papazotos P. , Chalkiadaki O. , Chatzistamatiou E.A. , Georgopoulos G. , Gkiouleka I. , Katsikis I. , Zygouri E. , Kelepertzis E. , Argyraki A.
Published: July 2017

Urban geochemistry is a scientific discipline which is growing in the recent years mainly because of the environmental impact caused by urbanization. The present study aims to determine the concentrations of potentially harmful elements (PHEs) on surface soils (0-10cm) in Athens parks. Soil sampling was carried out in public park areas within the Athens urban area. Twenty surface soil (0-10cm) samples were collected and the <100μm grain size fraction was analyzed by Flame Atomic Absorption Spectroscopy for Pb, Zn, Ni, Cu, Mn andCr after a strong acid dissolution and partial extraction by 1M HCl. The organic soil matter content was determined by a combustion method. Two different inter-correlated groups of elements were identified, one including Pb, Zn, Cu showing the anthropogenic signature on urban soil and another including Cr, Ni and Mn showing geogenic origin. The mobility of the heavy metals determined in the present study follows the decreasing order: Pb> Mn >Ni≈ Cu≈ Zn> Cr. The data indicate that park areas seem to be important sinks of anthropogenic elements in urban soils.
NEW APPROACHES TO THE REVEGETATION AND RECLAMATION OF OLD TAILING MANAGEMENT FACILITIES: THE EXAMPLE OF THE CASSANDRA MINES
Authors: Alifragkis D. , Vavelidis M. , Gazea B. , Voulgaridou E. , Galatsianou A. , Daftsis E.
Published: July 2017

Vegetation cover is a cost effective method for reclaiming old mine wastes and tailings disposal sites. Physicochemical characteristics of wastes and tailings are often inimical to successful vegetation establishment. In this research revegetation and reclamation of old tailings management facilities at Cassandra Mines was investigated. The research was conducted in three stages. In the first stage, the physicochemical characteristics of the mining wastes were studied and methods for reduction of the bioavailability of heavy metals by adding various amendments such as material rich in Mn and Fe oxides (by-products of pyrolusite industry, zeolite, phosphates, Fe oxides, Feo etc.) were investigated. In the second stage, the suitability of different plant species for revegetation of the mine wastes in greenhouse conditions was investigated. The results of this stage showed that the species Nerium oleander can be used successfully to stabilize the surface of the old mining wastes followed by a reduction of heavy metals bioavailability. In the third stage (pilot experiment), the six best treatments of greenhouse experiment were used in two sites (Olympias, Karakoli) with three repetitions per treatment. The plants were fertilized and irrigated for two growth periods. Biometrical characteristics of Nerium oleander (leaf area, height of plants, weight of leaves and number of branches) and concentrations of the elements in the leaves of the plants were determined. One year after, a number of other plant species colonized the area with natural processes. These plants were recorded, collected and identified and the chemical compositions and bioaccumulation factors were determined. The growth of Nerium oleander was successful for almost all treatments. The revegetation and stabilization of the experimental plots resulted to a quick colonization by various plant species. Thirty five (35) different plant species were recorded in “old Olympias tailings pond” and forty (40) species in “old Karakoli tailings dam”. Treatments affect the number of plant species colonized the experimental plots. The best treatments contained material rich in oxides of Fe and Mn.
ENVIRONMENTAL CONTAMINATION BY SUBSTRATA OF ORE MINING DUMPS, THEIR MONITORING AS WELL AS MEASURES OF REDUCTION
Authors: Blumenstein O. , Pustlauck F. , Vavelidis M.
Published: July 2017

The main activity fields of the research group “Applied Geoecology“ at the University of Potsdam are the development and tests of complex monitoring systems for water bodies and soils, together with the development of sustainable additives for vegetation restoration on ore mining dumps with extreme substratum parameters. The dump substrata are translocated by surface waters and by aeolian processes to the surroundings affecting soil processes. A field spectrometer has been engineered, which can detect dam substrata in soils. Moreover, various soil additives were developed, enabling the establishment of vegetation on the extreme dump substrata. For all components there have been realised extensive tests in the framework of greenhouse and field experiments under different climate conditions on three continents, on various substrata and with varying plant species. All experiments were successful, even though no additional irrigation and no mineral fertilizer were allowed to be used, in order to realise the idea of a sustainable greening.
GEOCHEMICAL MODELING OF ABANDONED SULFIDIC FLOTATION MILL TAILINGS: THE CASE OF KIRKI, NE GREECE
Authors: Triantafyllidis S.
Published: July 2017

The Kirki flotation plant is located approximately 5 km south of the Agios Filippos open pit mine (Thrace, NE Greece), and unconfined mill tailings are exposed to atmospheric conditions. Rain water accumulates on the surface of the tailings and interacts with the solids, resulting in highly acidic and oxidative surface solutions with increased heavy metal content. The tailings material is dominated by gangue minerals with very low acid buffering capacity, including quartz, kaolinite/dickite, pyrophyllite and minor orthoclase. Secondary phases identified include mainly species of the jarosite group, gypsum and anglesite. No primary ore minerals besides pyrite are identified. The finegrained character of the tailings material favors fast reactions between the surface waters and the solids. The speciation/mass transfer computer code PHREEQC-2 and the MINTEQ database were employed for geochemical modeling of the acidic surface waters of the tailings dams T1 and T2. Three different scenarios were employed, “Direct Precipitation”, “Mixing with Rainwater” and “Evaporation” to check the equilibrium between the developed surface solutions and the secondary minerals identified in the tailings. The purpose of this work is to understand the way heavy metals may be locked to the lattice of secondary minerals, or dispersed/dissolved after dissolution of unstable secondary phases.
Recent advances in understanding Pseudomonas aeruginosa as a pathogen
Authors: Klockgether Jens , Tümmler Burkhard
Published: July 2017

The versatile and ubiquitousPseudomonas aeruginosais an opportunistic pathogen causing acute and chronic infections in predisposed human subjects. Here we review recent progress in understandingP. aeruginosapopulation biology and virulence, its cyclic di-GMP-mediated switches of lifestyle, and its interaction with the mammalian host as well as the role of the type III and type VI secretion systems inP. aeruginosainfection.
Scaling-up primary health care-based prevention and management of alcohol use disorder at the municipal level in middle-income countries in Latin America: Background and pre-protocol for a three-country quasi-experimental study
Authors: Anderson Peter , O'Donnell Amy , Kaner Eileen , Gual Antoni , Schulte Bernd , Pérez Gómez Augusto , de Vries Hein , Natera Rey Guillermina , Rehm Jürgen
Published: July 2017

Background:While primary health care (PHC)-based prevention and management of alcohol use disorder (AUD) is clinically effective and cost-effective, it remains poorly implemented in routine practice. Systematic reviews and multi-country studies have demonstrated the ability of training and support programmes to increase PHC-based screening and brief advice activity to reduce heavy drinking. However, gains have been only modest and short term at best. WHO studies have concluded that a more effective uptake could be achieved by embedding PHC activity within broader community and municipal support. Protocol: A quasi-experimental study will compare PHC-based prevention and management of AUD, operationalized by heavy drinking, in three intervention cities from Colombia, Mexico and Peru with three comparator cities from the same countries. In the implementation cities, primary health care units (PHCUs) will receive training embedded within ongoing supportive municipal action over an 18-month implementation period. In the comparator cities, practice as usual will continue at both municipal and PHCU levels. The primary outcome will be the proportion of consulting adult patients intervened with (screened and advice given to screen positives). The study is powered to detect a doubling of the outcome measure from an estimated 2.5/1,000 patients at baseline. Formal evaluation points will be at baseline, mid-point and end-point of the 18-month implementation period. We will present the ratio (plus 95% confidence interval) of the proportion of patients receiving intervention in the implementation cities with the proportions in the comparator cities. Full process evaluation will be undertaken, coupled with an analysis of potential contextual, financial and political-economy influencing factors. Discussion:This multi-country study will test the extent to which embedding PHC-based prevention and management of alcohol use disorder with supportive municipal action leads to improved scale-up of more patients with heavy drinking receiving appropriate advice and treatment.
Making a difference? Public service broadcasting, distinctiveness and children’s provision in Italy and Spain
Authors: D’Arma Alessandro , Labio Aurora
Published: July 2017

This article evaluates the performance of public service broadcasters (PSBs) in the area of children’s television in Italy and Spain. It asks: how distinctive is the output of public service children’s channels? As core area of public service provision, children’s television represents an important testing ground for wider debates about the distinctiveness of public service broadcasting (PSB) in a digital age. Public broadcasters in Southern Europe have historically been more vulnerable to market pressure than their counterparts in continental and Northern Europe, and this is believed to have impacted negatively on their ability to maintain a distinctive public service profile. After engaging with debates on distinctiveness in order to develop a framework for the analysis, the article presents the results of a two-week analysis of the TV schedules of the main children’s channels operating in the two countries. It finds evidence that in both countries the output of public service children’s channels is distinctive to a degree, but also that there are important gaps in public service provision as well as some significant differences between the public service children’s channels analysed.
THE INFLUENCE OF TITANIUM-NIOBIUM ALLOYS ON THE GROWTH OF THE OXIDE LAYER
Authors: Krčil Jan , Mára Vladimír , Sobotová Jana , Krum Stanislav
Published: July 2017

This paper discusses issues of growth of a thin oxide layer formed on the surface of titanium alloys. The oxide layer on the surface introduces a corrosion resistance and a bio-compatibility, both of which are required for medical applications. The oxide layer is a result of a spontaneous passivation, but for the practical applications it is necessary to control the growth of oxides. In present work, the oxide layer was formed on the CP Ti grade 2, Ti39Nb alloy and CP Ti grade 2 with Ti39Nb PVD coating of two different thicknesses by a thermal oxidation at 600 °C for 8 hours. After the oxidation process the oxide layer was observed by SEM.
MECHANICAL PROPERTIES OF Cr-DLC LAYERS PREPARED BY HYBRID LASER TECHNOLOGY
Authors: Písařík Petr , Jelínek Miroslav , Remsa Jan , Tolde Zdeněk
Published: July 2017

Diamond like carbon (DLC) layers have excellent biological properties for use in medicine for coating implants, but poor adhesion to biomedical alloys. The adhesion can be improved by doping the DLC layer by chromium, as described in this article. Chromium doped diamond like carbon layers (Cr‑DLC) were deposited by hybrid deposition system using KrF excimer laser and magnetron sputtering. Carbon and chromium contents were determined by wavelength dispersive X-ray spectroscopy. Mechanical properties were studied by nanoindentation. Hardness and reduced Young's modulus reached 31.2 GPa and 271.5 GPa, respectively. Films adhesion was determined by scratch test and reached 19 N for titanium substrates. Good adhesion to biomedical alloys and high DLC hardness will help to progress in the field of implantology.
THE CURRENT VIEW ON THE USE OF RECONSTRUCTION MATERIALS IN DENTISTRY
Authors: Vrbova Radka , Bradna Pavel , Bartos Martin , Himmlova Lucie , Horazdovsky Tomas
Published: July 2017

The hardest tissue in the human body is the enamel which covers the anatomical crowns of teeth. It must be resistant to mechanical stress and the chemical attack of many substances from food, drinks and products of the metabolism of bacteria present in the oral cavity. These low pH substances dissolve the mineral components of enamel, cause tooth demineralization, and lead to decay or erosion damage with the irreversible loss of dental hard tissues and the necessity of their reconstruction. The range of dental materials intended for dental tissue reconstruction is extensive. Dental amalgam can be mechanically applied into the strongly stressed lateral segments of teeth. The use of amalgam is, however, in decline, with the possible health risks attributed to it, coupled with the need to extensively prepare tooth tissue promoting a shift towards using aesthetically and biologically favourable dental ceramic and polymeric materials instead. Current developments also concentrate on these materials to reinforce this, with polymeric composite materials based on methacrylates with varying amounts of inorganic fillers at the forefront. These materials are distinguished by their good mechanical and aesthetic properties and wear resistance. However, polymerization shrinkage and a strong hydrophobic nature does not allow for their direct bonding to hard dental tissues. Risks associated with the release of residual free monomers from the structure to the environment, which may cause health complications, mainly allergic reactions in sensitive individuals, have been monitored recently. Further development in the field of composite materials aims to reduce or completely eliminate these negatives.
EFFECT OF A 5-YEAR ALFACALCIDOL TREATMENT IN COMBINATION WITH CALCIUM CARBONATE ON BONE MINERAL DENSITY IN THE PRIMARY FORMS OF SYSTEMIC OSTEOPOROSIS IN MEN
Authors: Rodionova S S , Khakimov U R
Published: July 2017

The article presents the results of 5-year treatment with a combination of alfacalcidol and calcium carbonate in 47 men with primary forms of systemic osteoporosis. The obtained results show the effectiveness of this treatment in patients with low and normal turnover forms of osteoporosis. Significant increase of BMD at L1-L4 was observed after the first year of treatment, at the Neck region - after 3-rd year of treatment. Comparison of the magnitude of the annual increase of BMD has shown that the effectiveness of the treatment increases with its duration. The possibility of hypercalcemia was excluded by monitoring of calcium levels in blood and urine at intervals of 3-6 months throughout the treatment period.
THE ROLE OF MYOKINES INTERSTITIAL INTERACTION AND REGULATION OF METABOLISM: A REVIEW OF LITERATURE
Authors: Tsoriev T T , White Zh E , Rozhinskaya L Ya
Published: July 2017

Myokines are hormone-like acting molecules produced in skeletal muscles during and immediately after exercise. They affect both paracrine (inside the muscles themselves) and endocrine manner (in adipose tissue, liver, endothelium, skin, mucosa etc.) implementing different effects on target tissues, mainly through regulation of metabolic processes (such as glucose and lipid metabolism, growth and division of neurons and endothelial cells and others). The examination of myokines is of great interest for researchers of different medicine departments, particularly for endocrinologists, because of myokines’ involvement in pathogenesis of abdominal and visceral obesity, diabetes mellitus type 2 and cardiovascular diseases that are all the components of metabolic syndrome. The most important issue for clinicians is a possibility of future therapeutic implication of the myokine’s signal pathways in treatment of widespread metabolic disorders.
Existence and non-existence of solutions to a Hamiltonian strongly degenerate elliptic system
Authors: Anh Cung The , My Bui Kim
Published: July 2017

We study the non-existence and existence of infinitely many solutions to the semilinear degenerate elliptic system

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{\Omega\subset\mathbb{R}^{N}}

with smooth boundary

∂
⁡
Ω

{\partial\Omega}

.
Here

p
,
q

>
1

{p,q>1}

, and

Δ
λ

{\Delta_{\lambda}}

is the strongly degenerate operator of the form

Δ
λ

⁢
u

=

∑

j
=
1

N

∂

∂
⁡

x
j

⁢

(

λ
j
2

⁢

(
x
)

⁢

∂
⁡
u

∂
⁡

x
j

)

,

\Delta_{\lambda}u=\sum^{N}_{j=1}\frac{\partial}{\partial x_{j}}\Bigl{(}\lambda%
_{j}^{2}(x)\frac{\partial u}{\partial x_{j}}\Bigr{)},

where

λ
⁢

(
x
)

=

(

λ
1

⁢

(
x
)

,
…
,

λ
N

⁢

(
x
)

)

{\lambda(x)=(\lambda_{1}(x),\dots,\lambda_{N}(x))}

satisfies certain conditions.
Superlensing using complementary media and reflecting complementary media for electromagnetic waves
Authors: Nguyen Hoai-Minh
Published: July 2017

In this paper, we present the proof of superlensing an arbitrary object using complementary media and we
study reflecting complementary media for electromagnetic waves. The analysis is based on
the reflecting technique and new results on the compactness, existence, and stability for the Maxwell equations with low regularity data.
Methodology for assessing laser-based equipment
Authors: Pelegrina-Bonilla Gabriel , Hermsdorf Jörg , Thombansen Ulrich , Abels Peter , Kaierle Stefan , Neumann Jörg
Published: July 2017

Methodologies for the assessment of technology’s maturity are widely used in industry and research. Probably the best known are technology readiness levels (TRLs), initially pioneered by the National Aeronautics and Space Administration (NASA). At the beginning, only descriptively defined TRLs existed, but over time, automated assessment techniques in the form of questionnaires emerged in order to determine TRLs. Originally TRLs targeted equipment for space applications, but the demands on industrial relevant equipment are partly different in terms of, for example, overall costs, product quantities, or the presence of competitors. Therefore, we present a commonly valid assessment methodology with the aim of assessing laser-based equipment for industrial use, in general. The assessment is carried out with the help of a questionnaire, which allows for a user-friendly and easy accessible way to monitor the progress from the lab-proven state to the application-ready product throughout the complete development period. The assessment result is presented in a multidimensional metric in order to reveal the current specific strengths and weaknesses of the equipment development process, which can be used to direct the remaining development process of the equipment in the right direction.
25 Jahre Fachinformationssystem (FIS) Bildung – eine einzigartige Kooperation
Authors: Botte Alexander
Published: July 2017

Der Artikel stellt die Entstehung und die Entwicklung der Datenbank Fachinformationssystem (FIS) Bildung ausführlich dar und geht dabei besonders auf die Aspekte länder- und disziplinübergreifende Kooperationen, thematische Breite und Förderprogramme ein.

Am Schluss wird die Frage diskutiert, ob Publikationsdatenbanken in der modernen Forschungs- und Wissenschaftswelt weiter Bestand haben werden.
Effects of training on postural control and agility when wearing socks of different compression levels
Authors: Jaakkola Timo , Linnamo Vesa , Woo Mei Teng , Davids Keith , Piirainen Jarmo M. , Gråstén Arto
Published: July 2017

Study aim: The aim of this study was to evaluate the effects of training while wearing socks differing in compression level (clinical, sub-clinical, regular) on performance of static and dynamic balancing and agility tasks in healthy, physically active people. We sought to understand whether socks with different compression properties supported postural regulation and agility task performance by enhancing somatosensory perception, unskewed by specific age range effects. Material and methods: Participants comprised 61 adults aged 18-75 years, divided into three groups (two experimental groups wearing clinical or sub-clinical level compression socks, and one control group wearing regular non-compression socks during training). An 8-week (2 × 1h per week) intervention programme was administered to train static and dynamic balance and postural control, leg strength and agility. Results: A mixed model ANOVA revealed no differences in static and dynamic balance and postural control and agility performance between clinical, sub-clinical, and control groups before and after training. All groups significantly improved their test performance, suggesting that training had some benefit on motor performance. Conclusions: These results raised interesting questions requiring further investigation to examine the effects of wearing socks (with and without different levels of compression) on motor behaviours in specific groups of elderly vs. young participants, in physically active vs. less physically active people, and in performance settings outside standardized laboratory tests to study applications in natural performance environments.
Liquid biopsy in ovarian cancer: recent advances on circulating tumor cells and circulating tumor DNA
Authors: Giannopoulou Lydia , Kasimir-Bauer Sabine , Lianidou Evi S.
Published: July 2017

Ovarian cancer remains the most lethal disease among gynecological malignancies despite the plethora of research studies during the last decades. The majority of patients are diagnosed in an advanced stage and exhibit resistance to standard chemotherapy. Circulating tumor cells (CTCs) and circulating tumor DNA (ctDNA) represent the main liquid biopsy approaches that offer a minimally invasive sample collection. Both have shown a diagnostic, prognostic and predictive value in many types of solid malignancies and recent studies attempted to shed light on their role in ovarian cancer. This review is mainly focused on the clinical value of both CTCs and ctDNA in ovarian cancer and, more specifically, on their potential as diagnostic, prognostic and predictive tumor biomarkers.
Free vibration analysis of annular sector plates via conical shell equations
Authors: Demir Çiğdem , Ersoy Hakan , Mercan Kadir , Civalek Ömer
Published: July 2017

In this paper, free vibration analysis of annular sector plates has been presented via conical shell equations. By using the first-order shear deformation theory (FSDT) equation of motion of conical shell is obtained. The method of discrete singular convolution (DSC) and method differential quadrature (DQ) are used for solution of the vibration problem of annular plates for some special value of semi-vertex angle via conical shell equation. The obtained numerical results based on the two numerical approaches for annular sector plates compare well with the results available in the literature. The effects of some geometric parameters, grid numbers and types of the grid distribution have been discussed for curved plates.
Viewpoint phenomena in multimodal communication
Authors: Dancygier Barbara , Vandelanotte Lieven
Published: July 2017

In this introduction to the special issue on viewpoint phenomena in multimodal communication, we highlight central questions concerning the nature of multimodality and of conceptual viewpoint, which the issue as a whole expands and clarifies. We argue that multimodality needs to be rethought as a varied but cohesive phenomenon, and we briefly illustrate both embodied multimodal interaction (in an example from stand-up comedy) and the meaning emergence in artifacts relying on both text and image (in an example of a poster with an environmental message). Correspondingly, the category of multimodal constructions already recognized for embodied interactions should be expanded to cover conventionalized image/text combinations. Finally, we stress that viewpoint is the pivotal concept that elucidates how communicators use the various modalities for cohesive communicative purposes across the wide range of artifacts and multimodal forms discussed in the special issue, including gesture in political speeches, viewpoint in comics, grammatical forms in Internet memes, ASL, stance expressions, eye gaze, and embodied responses to objects and architectural artifacts.
Multi-Scale Control of Bunsen Section in Iodine-Sulphur Thermochemical Cycle Process
Authors: Mohd Noraini , Nandong Jobrun
Published: July 2017

Hydrogen is considered as an environmental friendly energy carrier but its actual impact on the environment depends on the way it is produced. A strategy of plant-wide modelling and advanced process control with optimization is currently developed for the Hydrogen production via the Iodine-Sulphur thermochemical cycle process. The objectives of this paper are two-folds: (1) to optimize the trade-off between steady-state profitability and dynamic operability of the Bunsen section subject to multiple constraints, and (2) to design practical control strategy based on the multi-scale control concept. A multi-scale modelling for the Bunsen section in the Hydrogen production via the Iodine-Sulphur thermochemical cycle process is presented. Based on this multi-scale model, a practical control design is developed and applied to Bunsen section. The suitable sets of control variables and manipulated variables are chosen via a sensitivity study incorporating the multivariate Response Surface Analysis method. By dint of simulation study, it can be shown that the proposed control strategy is able to produce a good closed-loop performance where its robustness depends strongly on the selected schemes of Bunsen section. It is worth highlighting that, the proposed multi-scale control strategy demonstrates robust performance in the face of the worst case uncertainty scenario.
Norm und Sanktion
Authors: Freitag Wolfgang
Published: July 2017

The paper examines a theory of normativity according to which norms are practical reasons constituted by sanctions. It argues that such a theory faces a number of objections derived from the concept of a sanction as an artificial, negative consequence of an action. In particular, the paper demonstrates that sanctions in this sense are not triggered by the performance of the action itself (as, for example, murder or theft), but rather by the agent’sappearingto have performed these actions. Thus, the sanction theory of normativity is unable to explain why the intended actions themselves – rather than the corresponding appearances – are forbidden. I conclude with a discussion of alternative conceptions of norms.
Die Wiederkehr der Moral?
Authors: Marchal Kai
Published: July 2017

In this essay I attempt to clarify the understanding of modernity that can be found in the writings of the Chinese thinker Wang Hui, especially in his magnum opus on The Rise of Modern Chinese Thought (2004). In this book, Wang describes the trajectory of major conceptual and paradigmatic changes from antiquity to modern China. I present and critically discuss important premises of this project, in particular Wang’s assumption that the formation of Chinese modernity is characterized by a dialectical tension between “critique/emancipation” and “control/order”. According to Wang, this tension is already present in the Neo-Confucian world-view, a rather convincing claim as I show in the second part of this essay. It is less clear, however, whether Wang succeeds in grounding Chinese modernity in the historical reality of late imperial China. In the last part, I provide discussion and suggestions for future research.
Synthesis and physicochemical characterization of branched poly(monomethyl itaconate)
Authors: Calderón Marcelo , Leiva Angel , Martinelli Marisa , Gargallo Ligia , Radic Deodato , Strumia Miriam
Published: July 2017

The synthesis and characterization of branched polymers derived from poly (monomethyl itaconate) (PMMI) are reported. Important changes in the properties of the functionalized products were found with respect to the base polymer, establishing a close relationship with the hydrophobic/hydrophilic balance of the products. The intrinsic viscosity of the branched PMMI showed an increment in its hydrodynamic volume due to the insertion of branched molecules, which correspond to a first generation of dendrons. Their incorporation into the polymer chain caused a change in the surface energy values of the sample films and enabled the products to form stable monolayers at the air-water interface
Effect of PTW on crystallization kinetics of toughened PBT/PC blends
Authors: Huiyu Bai , Xiaoya Liu , Yong Zhang , Yinxi Zhang
Published: July 2017

Poly(butylenes terephthalate) (PBT)/polycarbonate (PC)/poly(ethylenebutylacrylate- glycidyl methacrylate copolymer) (PTW) blends containing PTW as toughening modifier were obtained by extrusion and injection molding. The effect of PTW on the melt rheology of PBT/PC blend was examined by means of capillary calorimetry. The rheological properties of the blends suggested high reactivity between epoxy groups in PTW and terminal carboxylic acid group and/or hydroxyl group of PBT inhibited transesterification between PBT and PC. The effect of PTW on the crystallization of PBT in the PBT/PC/PTW blends was investigated by crystallization kinetics analysis under isothermal and nonisothermal conditions. Isothermal crystallization experiments were performed at crystallization temperature and analyzed based on the Avrami equation. A decrease of the half time of PBT crystallization t1/2, as well as an increase of the overall crystallization rate of PBT in the PBT/PC/PTW blends have been observed. Nonisothermal crystallization experiments were performed at given cooling rate. The Ozawa analysis is used to describe its nonisothermal crystallization behavior. It is observed that at a given cooling rate, the PTW increases the overall crystallization rate of PBT in the PBT/PC/PTW blends. This is consistent with the result obtained under isothermal crystallization condition.
Nucleating effect of surface modified MWNTs on crystallization of MWNTs/PA6 composites
Authors: Li Juan , Gu Qun , Fan Xinyu , Guo Zhenghong , Fang Zhengping
Published: July 2017

The surface characteristic of multi-walled carbon nanotubes (MWNTs) plays an important role in the crystallization of polyamide 6 (PA6). In this paper, 1,6-hexamethylenediamine(HMD) are grafted on MWNTs. The MWNTs before and after modification are used to fabricate PA6 composites through melt-blending. The nucleating effect of MWNTs with different surface characteristic is investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM) and Xray diffraction (XRD).The heterogeneous nucleating ability of MWNTs determined by the Dobreva method are higher for pristine than amine-functionalized MWNTs/PA6 composites with 1.0 wt% MWNTs. Addition of MWNTs induce more heterogeneous nucleation and retards the crystal growth of PA6. The presence of MWNTs facilitates the formation of α crystalline form, while amino-functionalization weakens this trend. MWNTs act as effective nucleation agents for PA6, resulting in the increased number and decreased size of spherulites. MWNTs facilitate the formation of α crystalline form of PA6. Amino-functionalization decreases the crystallization and nucleating effect of MWNTs on PA6