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Antibacterial activity of nanostructured Ti-45S5 bioglass-Ag composite against Streptococcus mutans and Staphylococcus aureus

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Transactions of Nonferrous metals Society of China 2016年第1期26卷 118-125页

作者： K.JURCZYK m.m.KUBICKA m.RATAJCZAK m.U.JURCZYK K.NIESPODZIANA D.m.nowak m.GAJECKA m.JURCZYK Department of Conservative Dentistry and Periodontology Poznan University of Medical Sciences Faculty of Pharmacy Department of Genetics and Pharmaceutical MicrobiologyPoznan University of Medical Sciences Division of mother's and Child's Health Poznan University of Medical Sciences Institute of materials Science and Engineering Poznan University of Technology Institute of Human Genetics Polish Academy of Sciences

mechanical alloying and annealing at 1150 °C for 2 h under an argon atmosphere were used to prepare Ti-45S5 bioglass nanocomposites. Ti-45S5 bioglass material was chemically modified by silver. The antibacterial activity of Ti-10% 45S5 bioglass nanocomposite containing silver against Streptococcus mutans and Staphylococcus aureus was studied. Nanocomposites were characterized by X-ray diffraction, scanning electron microscopy equipped with an electron energy dispersive spectrometer and transmission electron microscopy to evaluate phase composition, crystal structure and grain size. In vitro bacterial adhesion study indicated a significantly reduced number of Streptococcus mutans and Staphylococcus aureus on the bulk nanostructured Ti-45S5 bioglass-Ag plate surface in comparison to that on microcrystalline Ti plate surface. Nanostructured Ti-based biomaterials can be considered to be the future generation of dental implants.

关键词： 45S5 bioglass antimicrobial activity silver titanium dental implant Streptococcus mutans Staphylococcus aureus

Pathways to a hydrogen fuel infrastructure in Norway

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Pathways to a hydrogen fuel infrastructure in Norway

Bone mineral density （BmD）,sex hormones and IGF-I in men after 50 years old

第九届全国氢能学术会议

作者： C.Stiller K.A.Espegren A.Fidje E.Rosenberg m.nowak A.m.Svensson S.moller-Holst Norwegian University of Science and Technology

＜正＞Energy system characteristics vary significantly even between neighboring Scandinavian *** biomass and nuclear power constitute major contributions in Sweden and Finland,Norway fully meets the stationary electricity demand by renewable hydro ***, hydrogen is expected to become an integral part of the Norwegian energy system in the future, primarily as transportation fuel.

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Bone mineral density （BMD）,sex hormones and IGF-I in men a...

International Conference on Osteoporosis and Bone Research 2008

作者： J.Glogowska-Szelag D.Kajdaniuk B.Kos-Kudla B.marek m.nowak L.Siemińska Division of Pathophysiology and Clinical Endocrinology Department of Pathophysiology and EndocrinologySilesian Medical UniversityZabrzePoland

＜正＞Background:The purpose of this study was the investigation of serum concentration of basal testosterone,gonadotrophin and IGF-I to determine the bone mineral density （BmD） in men treated with alendronate.

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虎的现状及其研究

国外林业 1991年第2期21卷 10-12页

作者： Ronald m.nowak John L.Paradiso 朴仁珠

虎(Panthera tigris)、头体长1.4～2.8米,尾长60～95厘米(Grzimek1975)。其东北亚种(***)分布在西伯利亚东南部、中国东北及朝鲜北部、是现存猫科动物中个体最大者.

关键词：虎形态生活习性

An exsitu underground coal gasification experiment with a siderite interlayer:course of the process,production gas,temperatures and energy efficiency

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International Journal of Coal Science & Technology 2021年第6期8卷 1447-1460页

作者： marian Wiatowski Krzysztof Kapusta Jacek nowak marcin Szyja Wioleta Basa Główny Instytut Górnictwa(Central mining Institute) Plac Gwarków 140-166 KatowicePoland Politechnika Slaska Katedra Geologii Stosowanej(Institute of Applied GeologySilesian Technical University)ul.Akademicka 2AGliwicePoland

A 72-h ex situ hard coal gasification test in one large block of coal was carried *** gasifying agent was oxygen with a constant flow rate of 4.5 m^(3)/*** surroundings of coal were simulated with wet sand with 11%moisture content.A 2-cm interlayer of siderite was placed in the horizontal cut of the coal *** a result of this process,gas with an average flow rate of 12.46 m^(3)/h was *** direct influence of siderite on the gasification process was observed;however,measurements of CO_(2)content in the siderite interlayer before and after the process allow to determine the location of high-temperature zones in the *** greatest influence on the efficiency of the gasification process was exerted by water contained in wet *** the high temperature that prevailed in the reactor,this water evaporated and reacted with the incandescent coal,producing hydrogen and carbon *** reaction contributes to the relatively high calorific value of the resulting process gas,averaging 9.41 mJ/kmol,and to the high energy efficiency of the whole gasification process,which amounts to approximately 70%.

关键词： Underground coal gasification UCG Siderite interlayer Water Ex situ Hydrogen

Bonding effect of liquid magnesium with open-celled carbon foam in interpenetrating phase composite

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Journal of magnesium and Alloys 2021年第1期9卷 156-165页

作者： marcin Godzierz Anita Olszowka-myalska Natalia Sobczak Rafal nowak Patryk Wrze'sniowski Silesian University of Technology Faculty of Materials EngineeringKrasi´nskiego 8 street40-019 KatowicePoland Institute of metallurgy and materials Science Polish Academy of SciencesRaymonta 25 streetKrakówPoland Łukasiewicz Foundry Research Institute Zakopia´nska 73 street30-418 KrakówPoland

The issue of bonding formation in liquid metal/open-celled carbon foam(C_(of))systems was examined,taking into account the practical aspects of the synthesis of a new type of mg-C metal material *** problem is complex due to the strong oxidation and intense evaporation of liquid magnesium,as well as the 3D geometry of the carbon component,where metal transport occurred through the foam cells’*** experiments performed at 700℃ in ceramic crucibles showed that spontaneous carbon foam infiltration by liquid metal is impossible under the applied conditions,either in an air atmosphere coupled with flux protection or under argon *** tests performed in a UHV chamber filled with static pure Ar by a sessile drop method,coupled with non-contact heating and capillary purification at a test temperature of 700℃ directly in the UHV chamber,showed non-wetting behavior of the mg/C_(of)couple with a correspondingly high contact angle of about 135°.The graphite capillary was then moved down,the liquid drop being slightly pressed into the foam,but these changes did not induce effective foam *** the short contact time for the sessile drop test under an argon atmosphere,SEm+WDS analysis of the solidified mg/C_(of)couple revealed the formation of an mgO interlayer at the interface,with a thickness of approx.1μ*** experimentally demonstrated presence of oxygen in the carbon foam sample,both before and after its contact with magnesium,points to oxide-type bonding being established between mg and C_(of).This observation is in a good agreement with previous reports on the interface characterization of magnesium matrix composites reinforced with glassy carbon materials and carbon fibers by stir casting and pressure *** on the findings of this study,a general structural scheme of the bonding process between carbon foam and liquid magnesium,as an important stage in the syntheses of mg-C composites,was proposed.

关键词： magnesium matrix composite Open-celled carbon foam Interpenetrating phase composites Wetting Interface

Organic-walled microfossils from the Early middle Cambrian sediments of the Holy Cross mountains,Poland：Possible Implications for Sedimentary Environment in the SE margin of the Baltica

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 39-50页

作者： marta BAK Lucyna NATKANIEC-nowak Beata NAGLIK Krzysztof BAK Pawel DULEmBA Faculty of Geology Geophysics and Environmental Protection AGH University of Science and Technology Mickiewieza 30 30-059 Krakow Poland Institute of Geography Pedagogical University of Cracow Podchorazych 2 30-084 Krak6w Poland

An association of organic-walled microfossils consisting of filamentous cyanobacteria, algal coenobia and acanthomorphic acritarch have been documented from non-calcareous claystones and mudstones of the Pepper mountains Shale Formation（PmSF）, located in its stratotype area in the Pepper mountains, which are part of the Holy Cross mountains in Poland. These sediments represent the oldest strata of the ？ysogóry Unit, deposited on the edge of the East European Craton（Baltica）. Non-branched, ribbon-like and thread-like cyanobacteria trichomes exhibit morphological similarities to families Nostocaceae and Oscillatoriaceae. Cells assembled in rounded to irregular clusters of monospecific agglomerations represent multicellular algal coenobia, attributed to the family Scenedesmaceae. The co-occurrence of acritarchs belonging to species as Eliasum llaniscum, Cristallinium ovillense and Estiastra minima indicates that the studied material corresponds to the lower middle Cambrian. Deposition of the PmSF took place in shallow marine environment, influenced by periodical freshwater inputs. The varying degree of coloration of organic-walled microfossils is interpreted in this study as factor indication of possible different source of their derivation. Dark brown walls of cells assembled in algal coenobia might have sustained previous humification in humid, terrestrial environments, which preceded their river transport into the sea together with nutrients, causing occasional blooms of cyanobacteria in the coastal environment and the final deposition of both groups of organisms in marine deposits.

关键词： algal coenobia filamentous cyanobacteria acritarchs Cambrian Baltica Holy Cross mountains

Scalable batch fabrication of ultrathin flexible neural probes using a bioresorbable silk layer

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microsystems & Nanoengineering 2022年第1期8卷 305-315页

作者： Clement Cointe Adrian Laborde Lionel G.nowak Dina N.Arvanitis David Bourrier Christian Bergaud Ali maziz LAAS-CNRS 7 Avenue du Colonel RocheF-31400 ToulouseFrance CerCo UniversitéToulouse 3CNRSPavillon BaudotCHU PurpanBP 2520231052 ToulouseFrance UmR Institut National de la Santéet de la Recherche médicale 1048 Institut des Maladies Métaboliques et CardiovasculairesToulouseFrance

Flexible intracerebral probes for neural recording and electrical stimulation have been the focus of many research works to achieve better compliance with the surrounding tissue while minimizing *** have been explored to find the best way to insert flexible probes into the brain while maintaining their flexibility once ***,we present a novel and versatile scalable batch fabrication approach to deliver ultrathin and flexible probes consisting of a silk-parylene *** biodegradable silk layer,whose degradation time is programmable,provides a temporary and programmable stiffener to allow the insertion of ultrathin parylene-based flexible *** innovative and robust batch fabrication technology allows complete freedom over probe design in terms of materials,size,shape,and *** demonstrate successful ex vivo insertion of the probe with acute high-fidelity recordings of epileptic seizures in field potentials as well as single-unit action potentials in mouse brain *** novel technological solution for implanting ultraflexible devices in the brain while minimizing rejection risks shows high potential for use in both brain research and clinical therapies.

关键词： batch recording insertion

Health hazards related to conidia of Cladosporium—biological air pollutants in Poland, central Europe

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Journal of Environmental Sciences 2018年第3期30卷 271-281页

作者： Elzbieta Weryszko-Chmielewska Idalia Kasprzyk malgorzata nowak Aneta Sulborska Joanna Kaczmarek Agata Szymanska Weronika Haratym miroslaw Gilski malgorzata Jedryczka Department of Botany Lublin University of Life Sciences Department of Environmental Biology University of Rzeszow Laboratory of Aeropalynology Faculty of Biology Adam Mickiewicz University Department and Clinic of Dermatology University of Medical Sciences Institute of Plant Genetics Polish Academy of Sciences Institute of Bioorganic Chemistry Polish Academy of Sciences Department of Crystallography Faculty of Chemistry Adam Mickiewicz University

The spores of Cladosporium Link. are often present in the air in high quantities and produce many allergenic proteins, which may lead to asthma. An aerobiological spore monitoring program can inform patients about the current spore concentration in air and help their physicians determine the spore dose that is harmful for a given individual. This makes it possible to develop optimized responses and propose personalized therapy for a particular sensitive patient. The aim of this study was to assess the extent of the human health hazard posed by the fungal genus Cladosporium. For the first time, we have determined the number of days on which air samples in Poland exceeded the concentrations linked to allergic responses of sensitive patients, according to thresholds established by three different groups（2800/3000/4000 spores per 1 m^3 of the air）. The survey was conducted over three consecutive growing seasons（April–September, 2010–2012） in three cities located in different climate zones of Poland（Poznan, Lublin and Rzeszow）. The average number of days exceeding 2800 spores per cubic meter（the lowest threshold） ranged from 61（2010） through 76（2011） to 93（2012）, though there was significant variation between cities. In each year the highest concentration of spores in the air was detected in either Poznan or Lublin, both located on large plains with intensive agriculture. We have proposed that an effective, science-based software platform to support policy-making on air quality should incorporate biological air pollutant data,such as allergenic fungal spores and pollen grains.

关键词： Environmental contaminant Biological air pollution Inhalant allergy AsthmaAllergen Conidium