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Oceanologia
2004 No. 46 (3) 439-444
EN The ciliate Mesodinium rubrum Lohmann 1908 (=Myrionecta rubra Jankowski 1976) is an important phototrophic organism in the Gdańsk Basin. In June 2002 the vertical distribution and size structure of the M. rubrum population were studied. Its presence was generally observed in the whole water column ([...]
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International Journal of Occupational Safety and Ergonomics
2010 Vol. 16, No. 4 465--476
EN The microbial quality of the working environment was assessed in winter in air-conditioned office buildings in Warsaw. The average indoor concentrations of bacterial and fungal aerosols were low (<103 cfu∙m–3), below Polish proposals for threshold limit values in public service buildings. Even durin[...]
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Physicochemical Problems of Mineral Processing
EN Crushing is a process which is widely used in mineral processing plants, cement factories, aggregates plants and some other industrial plants. Specific fracture energy of the particles is not the only fundamental property that is important: the particle strength also plays a significant role in dete[...]
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Physicochemical Problems of Mineral Processing
EN The article presents investigation on the grinding rate constant. A selection function was measured for different raw materials using a ball mill, and effects of the grinding ball diameter and feed particle sizes on the materials grinding rate constant were investigated. The study was conducted for [...]
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Physicochemical Problems of Mineral Processing
EN The study of nucleation and granule formation in a bed of fine-grained material during the phase of batch damping in the process of periodical disc granulation was conducted. The study was carried out on laboratory disc (diameter - 0.5 m), with the use of constant disc filling with powder material, [...]
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Molecular and Quantum Acoustics
2007 Vol. 28 137-149
EN Acoustic spectroscopy has been used to investigate the effect of surface-coating layers in biocompatible magnetic fluids. The method applied is sensitive to structural changes in the suspension as the ultrasonic attenuation is correlated with the concentration of particles and the particle size dist[...]
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Molecular and Quantum Acoustics
2008 Vol. 29 121-133
EN Acoustic spectroscopy has been used to investigate the effect of surface-coating layers in biocompatible magnetic fluids. The method applied is sensitive to structural changes in the suspension as the ultrasonic attenuation is correlated with the concentration of particles and the particle size dist[...]
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Physicochemical Problems of Mineral Processing
EN Estimation of size distribution by image analysis is a key issue in mineral engineering. However, only the surface information of ore piles can be captured, which is a headache problem in this field while only a few researchers pay attention to this problem. A new surface probability model was propo[...]
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Physicochemical Problems of Mineral Processing
EN Municipal solid waste (MSW) contains mineral materials which are seldom considered as a potential resource. Currently, the waste management sector pays attention to recyclable parts, biodegradable material, waste-to-energy fraction, and residues after waste reuse and recycle. In contrast, this study[...]
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Inżynieria Mineralna
PL Tematem pracy jest porównanie wyników analiz składu ziarnowego tego samego materiału, uzyskanych przy użyciu różnych metod (zastosowano metodę sedymentacyjną, metodę mikroskopową oraz pomiar licznikiem Coultera). W tym celu metody pomiarowe zostały podzielone na związane ze sobą liniowo i nieliniowo[...]
EN The comparison of the grain composition analyses results of the same material is the topic of the paper (the sedimentation method, microscopic method and the measurement done by Coulter Counter). In this purpose the measure methods were divided into the linearly connected and non-linearly connected.[...]
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International Journal of Occupational Safety and Ergonomics
EN This article discusses the idea and set-up of a laboratory system for generating reproducible concentrated occupational aerosols containing metal compounds. Dust representatives for 2 metal-machining workstations (an electric grinder and an electric disc cutter) were released from a fluidized-bed ge[...]
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Chemical and Process Engineering
2018 Vol. 39, nr 3 335–-345
EN The aim of this work was to investigate the influence of distilled water flowrate in two different porousmembrane modules on the size of generated nitrogen nanobubbles. Modules had different diameter and number of membrane tubes inside the module. As bubbles are cut off from the membrane surface by [...]
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Archives of Metallurgy and Materials
PL Przedstawiono stereologie dla kul, których średnice mają rozkład logarytmiczno-normalny (LN). Zaproponowano stereologiczną metodę estymacji parametrów ( α; β) funkcji gęstości prawdopodobieństwa rozkładu LN. Rozkład rozmiarów cząstek Fe3C w sferoidycie niektórych stali jest rozkładem LN. [...]
EN Stereology for spheres, whose diameters distribution corresponds to the logarithmiconormal (LN) distribution is presented. A method for stereological estimation of parameters (α; β) of the LN probability density function is proposed. The size distribution of Fe3C-particles in spheroidized[...]
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Chemik
PL W pracy przedstawiono wyniki badań wpływu wybranych parametrów procesowo-aparaturowych na właściwości produktu wytworzonego w procesie mokrej granulacji talerzowej w układzie ciągłym. Jako zmienne parametry stosowano prędkość obrotową talerza, kąt nachylenia jego osi oraz natężenie podawania surowca[...]
EN The paper presents the results of the study of process-equipment parameters influence on the properties of product formed in the continuous, wet, drum granulation process. Plate rotational speed, the inclination angle of its axis and the intensity of powder material delivery were treated as variable[...]
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Archives of Acoustics
2015 Vol. 40, No. 4 485--489
EN Acoustic radiation sources are successfully applied to cleaning rooms from dust of fairly large particle sizes (ten micrometers and larger). The sedimentation of fine aerosols (particle diameter of 1–10 microns) is a more complicated challenge. The paper is devoted to the substantiation of the acous[...]
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Archives of Acoustics
EN Finding an efficient way to eliminate fine dust (particle diameter of 1-15 µm) from a room can be a challenging problem. Acoustic radiation emitters are widely used to accelerate particle coagulation and sedimentation. In this study, we propose one more method for depositing harmful particles – disp[...]
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Chemical and Process Engineering
2012 Vol. 33, nr 4 689--696
EN The purpose of the studies was to estimate efficiency of delivering nebulised drugs into the lower respiratory tract through endotracheal tubes (ET tubes) which are commonly used in the treatment of uncooperative patients. Water solution of Disodium Cromoglycate (DSCG) was nebulised with a constant [...]
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Inżynieria i Aparatura Chemiczna
2013 Nr 3 178--179
PL Przedstawiono ocenę wpływu warunków nawilżania złoża w procesie granulacji talerzowej, na powstawanie i wzrost aglomeratów w okresie dostarczania cieczy wiążącej. Proces granulacji prowadzono w sposób okresowy w granulatorze talerzowym o średnicy D = 0,5 m i wysokości obrzeża H = 0,10 m, przy stałej[...]
EN Evaluation of the influence of bed wetting conditions during periodic disc granulation on the nucleation and growth of agglomerates is presented. The process of granulation was carried out in a disc granulator of diameter D = 0.5 m, rim height H= 0.1 m, at constant rotational speed n = 0.167 s-[...]
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Inżynieria i Aparatura Chemiczna
2011 Nr 5 44-45
PL Zanieczyszczenia powietrza na przemysłowych stanowiskach pracy w postaci aerozoli z ciekłą i stalą fazą rozproszoną to uboczne efekty procesów z użyciem chłodziw. W pracy przedstawiono metody i wyniki badania filtracji pyłu i aerozolu cieczy przy obróbce mechanicznej. Wyniki potwierdzają prawidłowoś[...]
EN Air pollution in industrial workplaces in aerosols from the liquid and solid disperse phase processes are side effects of using coolants. The article presents methods and results of filtration of dust and liquid aerosol in machining with the use of coolants. The results confirm the correctness of th[...]
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Physicochemical Problems of Mineral Processing
2010 Vol. 44 205-214
PL Zaprezentowano biomimetyczną procedurę zarodkowania wzrostu CaCO3 przeprowadzając chemiczna syntezę „na mokro” koloidalnych cząstek CaCO3. Dokonano charakterystyki wytrąconych cząstek przez wyznaczenie ich składu ziarnowy. Badano też fizyczne i chemiczne parametry wytrąconych ziarn CaCO3. Badania te[...]
EN Biomimetic procedure for nucleation and growth of CaCO3 has been presented. The wet chemical syntheses of CaCO3 colloidal particles have been carried out. The characterization of precipitated particles of CaCO3 has been done using the particle size distribution analysis. The effect of physical and c[...]
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