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OALib Journal期刊

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CONDENSATIONAL GROWTH OF AEROSOL PARTICLES
Marek Mocicki
Bulletin of the Institute of Heat Engineering , 1993,
Abstract: Condensational growth of aerosol particles in free molecule, continuum and transition regimes using different models, has been analyzed. The influence of the growth model and the initial mass spectrum on the change of the aerosol mass has been investigated. Some conclusions concerning the practical application of the growth models and the initial spectrum have been presented.
APPLICATION OF B-SPLINES METHOD FOR INTERPOLATION OF THERMODYNAMIC FUNCTIONS OF SATURATED STEAM AND WATER
Marek Kosiński,Marek Mocicki
Bulletin of the Institute of Heat Engineering , 1985,
Abstract: The application of spline function for interpolation of one variable thermodynamic functions, is presented, theoretical basis of B-splines interpolation, thé method of determination of the knot values and its practical application are described. The computer code based on that method has been verified. Accuracy, smoothness and quick-running make the package veryuseful.
CONDENSATIONAL GROWTH OF DROPLETS IN CONTINUUM REGIME
Marian Kie?kiewicz,Marek Mocicki
Bulletin of the Institute of Heat Engineering , 1991,
Abstract: Condensational growth of droplets in continuum regime using Mason's formula has been analyzed. The influence of different parameters, like gas temperature, vapor saturation and mass of dissolved salt, on growth of droplets has been analyzed. The preliminary conclusions have been presented.
THE VARIATIONS OF AN AEROSOL MASS SPECTRUM CAUSED BY VAPOUR CONDENSATION
Marian Kie?kiewicz,Marek Mocicki
Bulletin of the Institute of Heat Engineering , 1992,
Abstract: The aerosol mass spectrum for the particular condensational mass growth rate and initial mass spectrum has been investigated using both analytic and approximate numerical methods. The obtained results have been compared and some conclusions concerning the approximate method have been presented.
Characterization of near-surface sediments based on combined geoelectric studies at Starunia palaeontological site and vicinity (Carpathian region, Ukraine)
W?odzimierz J. MOCICKI
Annales Societatis Geologorum Poloniae , 2009,
Abstract: Combined geoelectric research was performed in the Starunia area, where the specimens of woolly rhinoceros were discovered at the beginning of the 20th century. The work included: DC resistivity soundings, electromagnetic terrain conductivity measurements, resistivity imaging and penetrometer-based resistivity profiling. The main purpose of the survey was to give geoelectric characterization of near-to-surface sediments and estimate their variability (extent, thickness and electric resistivity). Generally, resistivity of geological strata is low and decreases with depth but its spatial distribution is locally complex. This complexity reflects joint effects caused by the presence of salty underground water outflows from the salt-bearing Miocene Vorotyshcha beds into the Quaternary sediments, distinct transformations of the geological medium by former ozokerite and oil exploitation and current activity of the natural geological processes in the area.
Physical properties of extrusion-cooked vegetable raw materials
Opydo B.,Mo?…??cicki L.
International Agrophysics , 1999,
Abstract: Study results on the selected physical properties of extrudates obtained from various cereals, legume and oleaginous seeds processed in a twinscrew extruder are reported in the paper. Influence of barothermal process parameters: temperature, pressure, die`s size, screw`s rotational speed on the expansion ratio and the water absorption index of the extru- dates was examined. The results obtained were used to define relationships between extrusion-cooking process parameters and quality of the products received from different raw materials.
Effect of Wheat Bran Addition and Screw Speed on Microstructure and Textural Characteristics of Common Wheat Precooked Pasta-Like Products.
Agnieszka Wójtowicz, Leszek Mo cicki
Polish Journal of Food and Nutrition Sciences , 2011, DOI: 10.2478/v10222-011-0010-z
Abstract: The present paper describes the wheat bran addition on microstructure, texture, colour and sensory characteristics of enriched precooked pasta-like products. Precooked pasta-like products were processed on a single screw extrusion-cooker TS-45 with L:D=16:1, shaped on the circular open die. Screw speed during the extrusion-cooking ranged from 60 to 120 rpm. Wheat bran were added in the amount from 5 to 25% of common wheat flour mass. The microstructure showed unmodified bran fractions at low screw speed, in turn higher rpm disrupted wheat bran cell walls. Hardness of dry pasta-like products, evaluated with the cutting test, was diminishing with a higher bran content in the recipe and was increasing with rpm applied. The firmness of hydrated products was decreasing with increasing bran addition (20 and 25% of bran in the recipe), whilst processing at low rpm caused poor quality of pasta-like products with great adhesiveness and stickiness. The higher bran content affected also the lower sensory notes. Colour measurement showed lower L* values for both raw and hydrated products with higher bran addition.
Electric resistivity and compactness of sediments in the vicinity of boreholes drilled in the years 2007-2008 in the area of Starunia palaeontological site (Carpathian region, Ukraine)
W?odzimierz J. MOCICKI,Tadeusz SOKO?OWSKI
Annales Societatis Geologorum Poloniae , 2009,
Abstract: Geoelectric research aiming to assess heterogeneity of geological environment was carried out in the Starunia area, where the unique specimens of woolly rhinoceros were discovered at the beginning of the 20th century. The DC azimuthal pole-dipole resistivity soundings and penetrometer-based resistivity profiling with simultaneous penetration-velocity measurements were used to study variability of environment in the vicinity of geological boreholes. No evident correlation was found between lithology of drilled sediments and geophysical data. Nevertheless, remarkable horizontal and vertical variability of geophysical parameters were observed. The largest horizontal changes may reflect an existence of some sharp boundaries in study area. The measured physical properties of geological strata: electric resistivity and compactness (estimated from penetration velocity) change also with the depth but correlation with geological structure can be found in limited cases only. Registered variability may have originated from several reasons: complex geological arrangement of shallow layers, salty underground water and bitumen presence in voids and pores, influence of neotectonic activity, and/or from transformations of near surface environment caused by past mining activity.
Aluminosilicate sorbents for control of KCl vapors in biomass combustion gases
Tomasz Hardy,W?odzimierz Kordylewski,Krzysztof Mocicki
Journal of Power Technologies , 2013,
Abstract: Lab-scale investigations have been conducted on the impact of additives on the abatement of chlorine corrosion induced by combustion or co-firing of agricultural biofuels in boilers. The effect of potassium retention and chlorine liberation was examined applying domestic aluminosilicates. The following additives were examined: kaolin, bentonite, halloysite and lignite fly ash. The samples of potassium chloride and the additive mixtures were heated in the muffle furnace at the temperature range 600–1000 oC. The obtained sintered samples were examined on: chlorine content, potassium retention and crystalline structure. Three minerals additives (kaolin, bentonite and halloysite) appeared to be effective in potassium binding in high temperature melting potassium aluminosilicates and in liberating chlorine at the temperature range 800–1000 oC. Also the aluminosilicate type lignite fly ash can be considered as very effective and inexpensive additive that prevents chlorine corrosion during biomass co-firing.
Determination of the content of silicon carbide by mass balance and analysis of oxygen and carbon content
Borecki, T.,Mocicki, A.,W?grzyn, J.
- , 2017,
Abstract: Sa?etak The paper presents the results of calculations of silicon carbide content in residue samples of carbothermic reduction of SiO2 after 6 hours. The content of SiC was calculated in two ways. The first from mass balance equations of samples and analysis of oxygen content. The second from analysis of oxygen and total carbon content. The values calculated by the two methods are similar. The total and free carbon content was determined according to procedures described in PN-EN ISO 21068-2:2010P and additional free carbon content at temperatures higher than recommended by the standard. The sum of calculated values of SiO2 and SiC contents revealed measured excess of free carbon content
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