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Search Results: 1 - 10 of 513 matches for " Aleksander Kufelnicki "
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Detection of Nitrate(NO-2) Ions Produced in Disproportionation of Nitrogen(II) Oxide in Aqueous Solution
Aleksander Kufelnicki , Jolanta Jaciubek-Rosińska
Ecological Chemistry and Engineering S , 2012, DOI: 10.2478/v10216-011-0004-0
Abstract: The nitrate ions (NO-2), products of disproportionation of NO in aqueous solution, were detected by an Orion Nitrite Electrode 97-46. Calibrations by means of standard NaNO2 solutions within the range 0.001÷100 ppm indicated linear dependence of EMF on ppm within 1÷100 ppm. Measurements justified the usefulness of this detection method of NO in solutions of OH- concentration lower than 10-2 mol dm-3 since at higher concentrations the EMF values exceeded the measurement range of the electrode. Occurrence of nitrate ions produced in the disproportionation reaction was additionally confirmed in dependence of OH- concentration by near UV and fluorescence spectra. The calibrated ion-selective nitrate electrode has also been shown, on the basis of Co(II)-dipeptide-OH- systems, as a useful tool in studying reversible NO uptake by Co(II) chelates in aqueous solution. Such a reaction may be regarded as simulating the harmful binding of NO by hemoglobin, where it substitutes the isoelectronic dioxygen.
Gauss’ Problem, Negative Pell’s Equation and Odd Graphs  [PDF]
Aleksander Grytczuk
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.14026
Abstract: In this paper we present some results connected with still open problem of Gauss, negative Pell’s equation and some type graphs.In particular we prove in the Theorem 1 that all real quadratic fields K=Q( ) , generated by Fermat’s numbers with d=Fm+1=22m+1+1,m≥2, have not unique factorization. Theorem 2 give a connection of the Gauss problem with primitive Pythagorean triples. Moreover, in final part of our paper we indicate on some connections of the Gauss problem with odd graphs investigated by Cremona and Odoni in the papper [5].
Calculation of the Centrally Symmetric and Vortex Forces Acting on Momentum in Distortion Tensor Field: Explanation of High-Temperature Plasma and Vortex Motions  [PDF]
Aleksander Yakovlevich Braginsky
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.74055
Abstract: The paper deals with calculation of the centrally symmetric and vortex forces for the momentum of a particle in the distortion tensor field from the action minimum, by analogy with the calculation of forces for a charge in an electromagnetic field. It is demonstrated that: 1) The compensating interaction tensor corresponds to the distortion tensor in a solid. 2) The centrally symmetric force of the distortion tensor acts on the momentum as a charge, and is analogous to the Coulomb force. In a gas, it results in change in the momentum value of the molecules exponentially to some extent. The action of this force explains the high-temperature plasma in the gas. 3) The vortex force of the distortion tensor is equivalent to the Peach-Koehler force in a solid. It acts on the momentum flow, similar to the Lorentz magnetic force, and explains the vortex motions in space, in the form of black holes, and in the atmosphere, in the form of cyclones and anticyclones.
Specific Features of Intramolecular Proton Transfer Reaction in Schiff Bases
Aleksander Koll
International Journal of Molecular Sciences , 2003, DOI: 10.3390/i4070434
Abstract: The differences between the intramolecular proton transfer in Mannich and Schiff bases are discussed. The tautomeric forms being in equilibrium in both types of molecules are seriously different. In Mannich bases there are in equilibrium the forms of phenols and phenolates. In Schiff bases each of tautomers is strongly influenced by resonance between zwitterionic and keto structures. Despite the common opinion that the proton transfer forms in compounds with internal π-electronic coupling are mainly keto forms it is shown in this work, that in Schiff bases the content of keto structure is slightly less than zwitterionic one. Almost equal participation of both forms leads to effective resonance between them and stabilization of intramolecular hydrogen bond in this way.
Activation of the polish coastal tourist reception region using the instrument of a Public-Private Partnership
Aleksander Szwichtenberg
Tourism , 2009, DOI: 10.2478/V10106-009-0010-0
Abstract: Public-Private Partnership (PPP) is a form of cooperation between the public sector and the private in order to carry out projects or services traditionally supplied by the public sector. This mode of investment is most commonly applied to the creation of technological infrastructure projects. According to the author PPP will allow coastal tourist communes (gminas) to speed up the implementation of the communication infrastructure, and the sport and recreational infrastructure which are presently major barriers to the development of the tourist economy. This is further confirmed by examples presented in this work.
From the history of information technology education
Piecuch Aleksander
Technológia vzdelávania , 2010,
Abstract: The term information technology has been present for about twenty years of the last century. It has become popular thanks to personal computers which have fully revolutionized lives of the society. For many people this is the beginning o introduction of a new school subject connected with computers. This association is at the same time true and untrue. You can agree with those who perceive this stage as a machine operated information technology i.e. the one which has been done with the use of information technology equipment. On the other hand, it is untrue if you turn back in time to the 1970s of the twentieth century. That was the time of a so-called non-machine operated information technology.
Se e come esiste la letteratura slavo-ecclesiastica Se e come esiste la letteratura slavo-ecclesiastica
Aleksander Naumow
Studi Slavistici , 2012,
Abstract:
Upper Badenian diatom paleoecolgy of the western part of Central Paratethys
Aleksander Horvat
Geologija , 2003,
Abstract: In the western part of Central Paratethys, on the territory of Slovenia, the Upper Badenian diatoms occur only in the Kr{ko basin. The diatom paleoecology of the Upper Badenian beds suggests their deposition in the marine littoral, in warm to moderatelywarm water of depth less than 100 meters and of salinity above 30 ‰.The frequency of resting spores and of species Thalassionema nitzschioides in the Upper Badenian sediments indicates an increased bioproduction and connection with centers of the littoral upwelling, and by this also the connection of Central Paratethys with theMediterranean via the “Transtethyan corridor” up to the end of Badenian.
Geology of the alek valley and the surrounding areas from written sources
Aleksander Brezigar
Geologija , 2007,
Abstract: In the paper are presented the oldest written records on Natural History, and especially the Earth Sciences concerning the [alek valley and surroundings, and that are of exceptionalcultural heritage value. We translated from archaic German a text by Hacquet from 1784 that discusses the Dobrna hot springs, and supplied it with explanations and comments.Added is the copy of a part of Hacquet’s lithohydrographic map with alek valley in its centre, and with our geologic explanations. Among the first geologists(geognosts)who studied the alek valley the German Keferstein should be mentioned, also author of the first geologic map of Germany,Studer,thewell-known Swiss geologist and founder of the Swiss Geologic Survey, and Ami Boué, one of founders of the French Geologic Society.The first modern geologic map of most of the [alek valley and Dobrna depression was elaborated between 1854 and 1856 by Marko Vincenc Lipold, the first geologist of Slovene origin and for many years the general manager of the Idrija mercury mine. The paper overs also the year 1875 when by drilling through the main lignite seam the rich Velenje coal deposit was recognized. This is considered the starting year of exploitation of the Velenje colliery.
Moczówka prosta pochodzenia centralnego
Aleksander Basiak
Pediatric Endocrinology, Diabetes and Metabolism , 2002,
Abstract: Moczówka prosta pochodzenia centralnego
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