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Search results for: iron
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Speciation of Iron in the Aquatic Environment
PublicationIron is one of the basic metals occurring in the aquatic environment and it is considered a macroelement with regard to live organisms. This metal has a broad range of applications that, together with factors conditioning its chemical transitions, results in the occurrence of many iron species in water. Depending on water and land development type, as well as the use of water for household and industrial purposes, iron may be found...
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Microwave-Reactor-Based Preparation of Red Iron Oxide Pigment from Waste Iron Sulfate
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A study of the influence of synthesis parameters on the physicochemical properties of iron pigments produced from waste iron sulfate
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Charging of the cast iron lapping tools.
PublicationPrzedstawiono technikę i technologię zbrojenia wymuszonego powierzchni docieraków tarczowych. Omówiono konstrukcję przyrządu oraz wyniki badań intensywności zbrojenia docieraków mikroziarnami węglika krzemu. Analizowano docieraki z żeliwa szarego i sferoidalnego oraz mikroziaren o numerze 320 i 300.
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On the characteristic and stability of iron diet supplements
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Functionalization of carbon encapsulated iron nanoparticles
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Advances in mass spectrometry for iron speciation in plants
PublicationIron is an important nutrient essential for plants and critical for human health. The state-of-the art of methods for iron speciation in cereal grains and plant fluids is critically reviewed. Particular attention is given to the latest developments in the coupling of HPLC with the parallel ICP MS and electrospray ionization (ESI) MS/MS detection, usually QTOF MS or Q-Orbitrap MS, for the identification and quantification of iron...
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Cast iron in the 19th-century building equipment
PublicationCast iron is a material, characteristics of which enable to receive extremely artistic elements. It maintains good strength properties at the same time. That combination of these seemingly contrary traits makes it a commodity that was widely used in the 19th century industry and architecture. These usages were not only as decorative elements, technical and structural ones. The production of new household utilities started, which...
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Iron complexes with terminal and nonbridging phosphanido ligands
PublicationThis review discusses known iron complexes with terminal-bonded and nonbridging phosphanido ligands R2Pand their analogs, such as phosphanylphosphanido, borylphosphanido and oligophosphanido groups, that have been reported since 1960s. Particular attention is focused on the synthesis and structural features of these complexes, which have a direct impact on their philicity and further reactivity. Moreover, their application in catalysis...
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Iron and manganese removal effects using zeolites
PublicationUsunięcie związków manganu i żelaza z wód podziemnych jest szczególnie ważne ze względów septycznych. Związki te powodują nieprzyjemny smak wody, w warunkach aerobowych tworzą osady. Związki te wytrącają sie w sieci wodociągowej.Celem badań była analiza przydatności naturalnego i modyfikowanego zeolitu jako materiału adsorpcyjnego do usuwania żelaza i manganu. Wprowadzenie modyfikowanego zeolitu umożliwiło uzyskanie dużej poprawy...
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Utilization of spent iron catalyst for ammonia synthesis
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Lack of magnetoacoustic emission in iron with 6.5% silicon
PublicationZjawisko emisji magnetoakustycznej (EMA) na ogół tłumaczy się dwoma przyczynami: ruchem nie 180-cio stopniowych granic domenowych (1) lub kreacją i anihilacją domen magnetycznych. Artykuł prezentuje silne dowody na poparcie faktu, że to właśnie ruch granic nie 180-cio stopniowych odpowiada za powstawanie efektu EMA. Wynika to z wyników pomiarów dających zerowe natężenie efektu EMA przeprowadzonych dla szerokiego zakresu naprężeń...
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Long-Term Vegetarian Diet and Iron Deficiency
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Increase of the Photocatalytic Activity of by Carbon and Iron Modifications
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Phonons in Iron: From the Bulk to an Epitaxial Monolayer
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Cavitation Erosion of Nodular Cast Iron - Microstructural Effects
PublicationThe paper deals with susceptibility of nodular cast iron with ferritic-pearlitic matrix on cavitation erosion. Cavitation tests were carried out with the use of a cavitation erosion vibratory apparatus employing a vibration exciter operated at frequency of 20 kHz. The study allowed to determine the sequence of subsequent stages in which microstructure of cast iron in superficial regions is subject to degradation. The first features...
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Effect of iron oxides scaling on the MD process performance
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Heterogeneity of ingot of the fused iron catalyst for ammonia synthesis
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Investigation of manganese-doped iron ammonia synthesis catalysts
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Wustite based iron-cobalt catalyst for ammonia synthesis
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Influence of local electron interactions on phonon spectrum in iron
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Grinding-induced functionalization of carbon-encapsulated iron nanoparticles
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Addition of azomethine ylides to carbon-encapsulated iron nanoparticles
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Vascular Aging and Damage in Patients with Iron Metabolism Disorders
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Iron filled carbon nanostructures from different precursors
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Synthesis and characterization of iron-filled multi-walled nanotubes
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Dynamics of changes in iron concentration and total iron binding capacity in blood plasma of goat kids during their first month of life (Short Communication)
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Electrochemical Activity and Electrical Properties of Optimized Polypyrrole Coatings on Iron
PublicationIn this work, electrochemical activity and electrical properties of polypyrrole (PPy) coated iron electrodes have been investigated. PPy film was electrochemically polymerized from sodium salicylate aqueous solution under conditions, which provided an increase of iron corrosion resistance. It was noticed that the pH of the solution and the applied electrode potential range during the study of the polymer properties had an influence...
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Impedance Studies of Phosphate-iron Glasses Containing Niobium and Titanium
PublicationThe ac and dc conductivity in phosphate-iron-niobate glasses with addition of titanium oxide was investigated as a function of temperature and frequency with the use of impedance spectroscopy. The topography and microstructure of glasses were investigated by the means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and confocal microscopy methods. The obtained results show that all samples are amorphous but they...
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Excavation induced cast iron pipeline failure – a numerical study
PublicationNumerical study on impact of an unsecured excavation on an underground pipeline. Analysis focused on investigation of pipeline displacement generated by soil movement caused by excavation and heavy traffic. Numerical calculations and soil parameter sensitivity analysis based on Finite Element Method. Some comparisons of results with real-life failure cases.
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Dependence of cavitation performance of superficial iron alloys on the sub-strate
PublicationWykazano zależność odporności kawitacyjnej laserowo wytworzonych i elektrodąotuloną napawanych powłok od rodzaju podłoża. Napoiny wykonywano na stali 45, 2H13, 0H18N9 i na żelazie Armco.
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Study of the Kinetics of Ammonia Synthesis and Decomposition on Iron and Cobalt Catalysts
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Hexakis(1-methylimidazole-kN3)iron(II) dichloride dihydrate
PublicationTytułowy związek, [Fe(C4H6N2)6]Cl2.2H2O jest izostrukturalny z odpowiednimi związkami Co, Ni i Ru. W kompleksowym kationie żelazo(II) jest koordynowane oktaedrycznie przez sześć ligandów 1-metyloimidazolowych. Jon ujemny jest agregatem dwóch jonów chlorkowych i dwóch cząsteczek wody połączonych wiązaniami wodorowymi.
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Preparation and photocatalytic activity of iron-modified titanium dioxide photocatalysts
PublicationTiO2 modyfikowany żelazem otrzymano dwiema metodami: metodą zol-żel oraz metodą impregnacji powierzchniowej. Fotokatalizatory kalcynowano w temperaturze 400C. Jako matrycę TiO2 zastosowano komercyjnie dostępne proszki ditlenku tytanu: P25 (Evonik, Niemcy, 50m2/g) oraz ST-01 (Ishihara Sangyo, Japonia, 300m2/g). Charakterystyka otrzymanych fotokatalizatorów obejmowała wyznaczenie właściwości absorpcyjnych, powierzchni właściwej BET...
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Conjugation of polyethylenimine and its derivatives to carbon-encapsulated iron nanoparticles
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Iron filled singlewalled carbon nanotubes – synthesis and characteristic properties
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Facile synthesis and properties of iron oxide spheres coated with carbon
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Salicylaldimine-based receptor as a material for iron(III) selective optical sensing
Publicationα,α-Bis(salicylimino)-m-xylene (L) was prepared using both conventional and microwave-assisted procedure. The compound exhibits ability to colorimetric recognition of iron(III) ions in aqueous environment, what is shown by significant color change from yellow to purple. In DMSO : water (9:1 v/v) solvent system receptor creates with iron(III) cations complexes of 2:1 stoichiometry (L:Fe3+) with stability constant (log K) 7.54±0.21....
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Electrical properties and structure of lead-borate glass containing iron ions.
PublicationThe ac and dc conductivity in iron–lead-borate glass samples was investigated in the frequency range from 1 mHz to 1 MHz and in the temperature range from 153 K to 423 K. The structure was investigated by the means of atomic force microscopy (AFM) and the crystalline phases (if present) were identified by the means of X-ray diffractometry. Two types of ac electrical behaviour were observed. The first group of glass samples which...
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Sizes of iron hydroxide particles formed during ferric coagulation processes
PublicationThe aim of the study was to apply laser granulometer for measuring sizes of particles formed in iron-based coagulation process in water, which did not contain significant amounts of organic compounds. The research was conducted using tap water, obtained from underground sources. Iron sulfate in doses of 2.0–10.0 mgFe L–1 was added to water. During initial stage of flocculation, iron hydroxide particles reached dimensions between...
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Nonlinear modeling of traction transformer with coiled iron core for dynamic simulation
PublicationW referacie przedstawiono wyprowadzenie zastępczego modelu obwodowego transformatora trakcyjnego o rdzeniu zwijanym do analiz zachowania sie transformatora w układzie napedowym jednostki trakcyjnej. Model zakłada nieliniowa charakterystyke magnesowania B-H i anizotropowe właściwosci magnetyczne i elektryczne zwijanego rdzenia. Wyprowadzenie modelu oparto na metodzie energetycznej Lagrange'a. Uzwojenia zostały zamodelowanie jako...
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Synthesis and electrochemical characterization of poly(3,4-ethylenedioxythiophene) modified by iron hexacyanocobaltate
PublicationPraca dotyczy sposobu syntezy oraz elektrochemicznej charakterystyki materiału kompozytowego złożonego z poli(3,4-etylenodioksytiofenu) i heksacyjanokobaltanu(III) żelaza(II). Wybrany materiał badany był przy użyciu spektroskopii impedancyjnej, chronopotencjometrii oraz woltamperometrii cyklicznej w kontakcie z elektrolitem wodnym (KCl) oraz aprotycznym (LiPF6 w mieszaninie węglanu etylenu i węglanu propylenu). Materiał charakteryzuje...
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Cadmium, arsenic, selenium and iron– Implications for tumor progression in breast cancer
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Electrical properties and structure of lead-borate glass containing iron ions
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Iron overload and HFE gene mutations in Polish patients with liver cirrhosis
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Iron Core Inductor High Frequency Circuit Model for EMC Application
PublicationW referacie przedstawiono szerokopasmowy model obwodowy dławika z rdzeniem ferromagnetycznym przydatny do analizy propagacji zaburzeń elektromagnetycznych przewodzonych w układach przekształtnikowych. Opracowany model uwzględnia zmiany właściowści dławika w zakresie wysokich cżstotliwosci na skutek występowania naskórkowości, prądów wirowych oraz efektu zbliżenia w uzwojeniach.
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The activity of fused-iron catalyst doped with lithium oxide for ammonia synthesis
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Determination of the Content of Promoters in Magnetite and Wustite Phases in the Fused Iron Catalyst
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Imprinted polymer particles for iron uptake: Synthesis, characterization and analytical applications
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Electrochemical and catalytic assessment of peripheral bromoaryl-substituted manganese and iron porphyrazines
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