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Tytuł:
Badania cementów portlandzkich produkowanych w różnych systemach mielenia
Examinations of portland cements produced in different grinding systems
Autorzy:
Baran, T.
Pichniarczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/392348.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:
cement portlandzki
przemiał cementu
młyn kulowy
młyn pionowy
właściwości cementu
rozkład ziarnowy
Portland cement
cement grinding
ball mill
vertical roller mill
cement properties
particle size distribution
Opis:
Proces przemiału cementu jest jedną z kluczowych operacji technologicznych w produkcji cementu. W przemyśle cementowym najbardziej rozpowszechnionymi instalacjami są młyny kulowe pracujące w zamkniętym obiegu. W trzech ostatnich dekadach coraz popularniejsze w cementowniach na świecie stają się młyny pionowe, umożliwiające uzyskanie wielu korzystniejszych parametrów procesowo-technologicznych. W Polsce, w ostatnich latach, uruchomiono dwie instalacje młynów pionowych. W artykule przedstawiono i porównano właściwości cementów wyprodukowanych w dwóch systemach mielących, w młynie pionowym i kulowym. Stwierdzono, że w zależności od systemu mielenia produkowany cement różni się istotnie rozkładem faz mineralnych w poszczególnych frakcjach mlewa. Determinuje to cechy użytkowe cementów – wytrzymałość i właściwości reologiczne.
Grinding process of cement is one of the most important technological operation in cement production. Ball mills with closed circuit are most common installations in the cement industry. Over last three decades vertical roller mills, which enable to achieve many beneficial process and technological parameters, have become more popular. In Poland two vertical roller mills were installed recently. In the paper properties cements produced in two different grinding systems were presented and compared. It was stated that distribution of mineral phases in fractions of cement differs significantly for grinding system of cement. It determines mechanical and rheological properties of cement.
Źródło:
Prace Instytutu Ceramiki i Materiałów Budowlanych; 2011, R. 4, nr 8, 8; 114-125
1899-3230
Pojawia się w:
Prace Instytutu Ceramiki i Materiałów Budowlanych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of CEC using fractal parameters by artificial neural networks
Autorzy:
Bayat, H.
Davatgar, N.
Jalali, M.
Powiązania:
https://bibliotekanauki.pl/articles/25675.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
cation exchange capacity
prediction
fractal structure
fractal theory
particle size distribution
artificial neural network
pedotransfer function
Opis:
The prediction of cation exchange capacity from readily available soil properties remains a challenge. In this study, firstly, we extended the entire particle size distribution curve from limited soil texture data and, at the second step, calculated the fractal parameters from the particle size distribution curve. Three pedotransfer functions were developed based on soil properties, parameters of particle size distribution curve model and fractal parameters of particle size distribution curve fractal model using the artificial neural networks technique. 1 662 soil samples were collected and separated into eight groups. Particle size distribution curve model parameters were estimated from limited soil texture data by the Skaggs method and fractal parameters were calculated by Bird model. Using particle size distribution curve model parameters and fractal parameters in the pedotransfer functions resulted in improvements of cation exchange capacity predictions. The pedotransfer functions that used fractal parameters as predictors performed better than the those which used particle size distribution curve model parameters. This can be related to the non-linear relationship between cation exchange capacity and fractal parameters. Partitioning the soil samples significantly increased the accuracy and reliability of the pedotransfer functions. Substantial improvement was achieved by utilising fractal parameters in the clusters.
Źródło:
International Agrophysics; 2014, 28, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Wetting on The Course of The Drum Granulation
Autorzy:
Błaszczyk, M.
Heim, A.
Olejnik, P.
Powiązania:
https://bibliotekanauki.pl/articles/185141.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
drum granulation
surface tension
particle size distribution
granulacja bębnowa
napięcie powierzchniowe
rozkład wielkości cząstek
Opis:
This paper presents the results of experimental drum granulation of silica flour with the use of wetting liquids with different values of surface tension. Additionally, different liquid jet breakup and different residual moisture of the bed were applied in the tests. The process was conducted periodically in two stages: wetting and proper granulation, during which no liquid was supplied to the bed. The condition of the granulated material after the period of wetting (particle size distribution and moisture of separate fractions) and a change in the particle size distribution during the further conduct of the process (granulation kinetics) were determined.
Źródło:
Chemical and Process Engineering; 2017, 38, 2; 331-342
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of exposure to nano-sized particles among transport and vehicle service workers
Autorzy:
Bujak-Pietrek, Stella
Mikołajczyk, Urszula
Powiązania:
https://bibliotekanauki.pl/articles/2087543.pdf
Data publikacji:
2021-11-19
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
ultrafine particles
particle number concentration
particle surface area concentration
nanoparticles exposure
diesel engine exhaust
particle number size distribution
Opis:
BackgroundExposure to fine and ultrafine particles from transport processes is a main consequence of emissions from engines, especially those with self-ignition. The particles released in these processes are a source of occupational and environmental particles exposure. The aim of this study was to assess the fine and nano-sized particles emission degree during work connected with transport and vehicle servicing.Material and MethodsThe tests were carried out at 3 workplaces of vehicles service and maintenance (a car repair workshop, a truck service hall, and a bus depot) during 1 work day in each of them. Measurements were performed using the following devices: DISCmini meters, GRIMM 1.109 optical counter and the DustTrak monitor. The number, surface area and mass concentration, and the number size distribution were analyzed.ResultsThe mean number concentration (DISCmini) increased during the analyzed processes, ranging from 4×104 p/cm3 to 8×104 p/cm3, and the highest concentration was found in the car repair workshop. The particles mean diameters during the processes ranged 31–47 nm, depending on the process. An increase in the surface area concentration value was observed in correlation with the particles number, and its highest concentration (198 m2/cm3) was found during work in the car repair workshop. The number size distribution analysis (GRIMM 1.109) showed the maximum value of the number concentration for particles sized 60 nm. The mean mass concentrations increased during the tested processes by approx. 40–70%, as compared to the background.ConclusionsAccording to the measurement results, all the workplaces under study constituted a source of an increase in all analyzed parameters characterizing emissions of nano-sized particles. Such working environment conditions can be harmful to the exposed workers; therefore, at such workplaces solutions for minimizing workers’ exposure, such as fume hoods or respiratory protection, should be used. Med Pr. 2021;72(5):489–500
Źródło:
Medycyna Pracy; 2021, 72, 5; 489-500
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of particle size distribution of grinded amber by electropulse discharges in a liquid medium
Autorzy:
Chornyi, Valentyn
Kharchenko, Yevhen
Mysiura, Taras
Popova, Nataliia
Zavialov, Volodymyr
Powiązania:
https://bibliotekanauki.pl/articles/1845029.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amber
electropulse discharge
grinding
particle size distribution
fraction
bursztyn
szlifowanie
rozkład wielkości cząstek
frakcja
Opis:
The article presents the study results of electropulse grinding of amber in aqueous and alcoholic media at different amounts of supplied energy. Description of the electropulse grinding laboratory installation, the mechanism of the destruction process of amber particles and methods of statistical processing of experimental data are given. It was established that alcohol medium has a greater impact on the efficiency of crushing than water. Thus, under the same conditions of energy supply, in the aqueous medium the weighted average particle size of amber was 601:6±688:9 μm, and in an alcohol medium – 368:0±269:6 μm. In an aqueous medium, the particle size decreased to 1/13.6 of raw sample, and in an alcoholic medium to 1/22.3 of raw sample compared to the initial size of raw amber. We found that in the aqueous medium the ratio of large to small fractions is mainly the same with the coefficient of alignment of particles with a size of 1.09. In an alcoholic medium, this ratio significantly differs, with the coefficient of alignment of amber particles of a size of 1.67 with the amount of supplied energy of 125 kJ.
Źródło:
Archive of Mechanical Engineering; 2021, LXVIII, 3; 337-348
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulating particle packing for soil porosity investigations
Autorzy:
Czachor, H.
Konstankiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2056984.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
moisture
packing
grain size
soil
pore
particle packing
capillary pressure
porosity
distribution
Źródło:
International Agrophysics; 1995, 09, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrasonic Properties of Magnetic Nanoparticles with an Additional Biocompatible Dextrane Layer
Autorzy:
Dąbek, L.
Hornowski, T.
Józefczak, A.
Skumiel, A.
Powiązania:
https://bibliotekanauki.pl/articles/176605.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetic nanoparticles
ultrasound
particle size distribution
Opis:
The temperature dependence of the particle size distribution (PSD) of the magnetic fluid with an additional biocompatible dextran layer was studied using a ultrasonic method. The measurements of the ultrasound velocity and attenuation were carried out as a function of the volume concentration of magnetite particles at temperatures ranging from 15°C to 40°C. In order to extract the PSD from ultrasonic measurements, the theoretical model of Vinogradov-Isakovich was used. The extraction of PSD from the ultrasonic data requires also the measurements the density and viscosity of the ferrofluid samples. The calculated PSD of the magnetic fluid with an additional biocompatible layer shows a greater thermal stability than that of a magnetic fluid with a single surfactant layer.
Źródło:
Archives of Acoustics; 2013, 38, 1; 93-98
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Otrzymywanie mikrokapsułek alginianowych za pomocą ultradźwięków
Preparation of alginate microcapsules using ultrasound treatment
Autorzy:
Dajnowiec, F.
Biegaj, M.
Banaszczyk, P.
Kubiak, A.
Zander, L.
Powiązania:
https://bibliotekanauki.pl/articles/2073049.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mikrokapsułki alginianowe
ultradźwięki
atomizacja
rozkład wielkości cząstek
alginate microcapsules
ultrasound
atomization
particle size distribution
PSD
Opis:
Badano rozkłady wielkości cząstek mikrokapsułek alginianu wapniowego, zawierających zemulgowane biooleje: amarantusowy i rokitnikowy. Dyspersje otrzymywano z wykorzystaniem energii ultradźwięków przy formowaniu emulsji i atomizacji emulsji przed żelowaniem. Wykazano możliwość otrzymywania kulistych mikro-cząstek alginianowych o średnicy poniżej 100 (im pełniących funkcję nośników substancji hydrofobowych w wieloskładnikowych produktach chemicznych, farmaceutycznych i spożywczych.
Particle size distributions (PSDs) of calcium alginate microcapsules with emulsified Amaranth and Sea Buckthorn biooils have been analyzed. Disperse systems were produced by ultrasound treatment during emulsifying and atomizing procedures. The possibility of production of spherical, calcium alginate microbeads of diameter below 100 nm, being carriers of hydrophobic compounds in multi-component chemical, pharmaceutical and food products has been demonstrated.
Źródło:
Inżynieria i Aparatura Chemiczna; 2015, 2; 29--30
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of radiotracers as tools to determine feed flowrate imbalances and particle size segregation in industrial flotation circuits
Autorzy:
Diaz, Francisco
Barrientos, Nelson
Powiązania:
https://bibliotekanauki.pl/articles/24291630.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
radiotracers
flotation
particle size segregation
feed flow distribution
Opis:
This publication presents the application of radiotracers in the characterization of industrial flotation circuits. Two examples are showcased: the detection of feed flow rate imbalances and the characterization of particle size segregation in automatic mineral-cutting machines. The feed pulp distribution was determined from the mean residence times. Particle size segregation was measured by sampling the cutting machines (≅ 25 grams samples) using coarse, intermediate, and fine-sized radiotracer particles. Radiotracers were injected into the feed streams and measured at various points of the circuit using nuclear instruments, allowing for non-invasive and real time detection. Results show that in the rougher flotation stage, the feed flow is distributed almost evenly in lines 2 and 3 (approximately 38% of the flow goes to each line) and to a lesser extent towards line 4 (approximately 24%). In lines 1 and 2 of the scavenger stage, a higher percentage of the flow goes towards line 1 (approximately 59%) and a lower percentage towards line 2 (41%). Line 6 of the rougher flotation is the fastest of the circuit (shortest residence time). In addition, the inlet mineral-cutting machine of the rougher stage segregates particles with a bias for fine sizes (11.4 % more fine-sized particles than coarse ones). This work is an example of how radiotracer technology can be applied to improve metal production and processes. Radiotracers provide reliable information to be used in combination with other metallurgical data to properly assess flotation circuits.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 174817
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal treatment effect on the particle size distribution of alkaline earth metals hydroxyapatite
Autorzy:
Diichuk, Volodymyr
Diichuk, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/35500900.pdf
Data publikacji:
2023
Wydawca:
Radomskie Towarzystwo Naukowe
Tematy:
hydroxyapatite
phase composition
thermal treatment
particle size distribution
hydroksyapatyt
skład fazowy
obróbka termiczna
rozkład wielkości cząstek
Opis:
Hydroxyapatites of certain alkaline earth metals were synthesised, and their phase composition was determined using X-ray phase analysis. Thermal modification of the studied compounds was performed at temperatures not exceeding 800°C. The laser diffraction method determined the size distribution of the samples subjected to thermal treatment. It was found that the mean particle size ranged from 5,48±1,28 to 126,71±3,68 μm. It has been demonstrated that particle aggregation and fragmentation processes are possible depending on the synthesised compounds' qualitative and quantitative phase composition and the modification temperature.
Źródło:
Scientiae Radices; 2023, 2, 4; 309-318
2956-4808
Pojawia się w:
Scientiae Radices
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of hydrocarbon contamination on the engineering geological properties of Neogene clays and Pleistocene glacial tills from Central Poland
Autorzy:
Dobak, Paweł
Izdebska-Mucha, Dorota
Stajszczak, Piotr
Wójcik, Emilia
Kiełbasiński, Kamil
Gawriuczenkow, Ireneusz
Szczepański, Tomasz
Zawrzykraj, Piotr
Bąkowska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/24024696.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
petroleum products
contamination
clay soils
permeability
shear strength
swelling
particle size distribution
produkty naftowe
zanieczyszczenia
grunty spoiste
przepuszczalność
wytrzymałość na ścinanie
pęcznienie
rozkład wielkości cząstek
PSD
Opis:
Petroleum products influence the engineering behaviour of the soil. Neogene clays and glacial tills from Central Poland were tested under laboratory conditions to evaluate the changes of selected physical and mechanical parameters: particle size distribution, particle density, swelling, shear strength and permeability. Four petroleum products were used in the experiments: diesel fuel, kerosene, jet fuel and mineral engine oil. The study revealed that even for the lowest degree of contamination the values of physical and mechanical properties of the soils changed significantly. Greater variation can be expected in soils contaminated with high-viscosity compounds. Also, higher relative changes were found for glacial tills than for Neogene clays. Consolidation tests revealed changes in soil permeability depending on the soil composition and the physical properties of the contaminant – considerable reduction of permeability was observed for glacial tills contaminated with light Jet fuel, while the reduction was lower for Neogene clays. The obtained results indicate the role of mesopores and the dimensionless pore pressure coefficient in changes of soil permeability. The methodological issues regarding testing and analysing the hydrocarbon-contaminated soils were also presented and discussed, which might be useful for researchers studying contaminated soils.
Źródło:
Acta Geologica Polonica; 2022, 72, 4; 529--555
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of droplet size distribution in selected nebulizers
Autorzy:
Dobrowolska, Katarzyna
Sosnowski, Tomasz R.
Powiązania:
https://bibliotekanauki.pl/articles/1450682.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
spraying
liquid atomization
aerosol dynamics
particle size distribution
Opis:
Nebulizers are the class of atomizing devices used to disperse liquids to fine droplets. They found their application in selected technological (typically: small-scale) processes, but their most common use is related to the generation of medicinal aerosols for inhalation. In this work we present the experimental data on the evolution of the size distributions of water droplets generated by two nebulizers (pneumatic and vibrating-mesh) as a result of aerosol mixing with the ambient air. Such a process reflects the real situation, where aerosol emitted from a nebulizer is diluted by additional air sucked by a patient during inhalation. Droplet size distribution was determined by laser diffraction, and these results were further discussed including the data of the aerosol velocity measured by the Laser Doppler Anemometry (LDA). It was demonstrated – as expected - that dilution with the ambient air with moderate humidity results in the intense evaporation of the smallest droplets. However, larger droplet may be saved to a different degree depending on the velocity and geometry of the aerosol cloud emitted from the nebulizer, and on the volume of the diluting air. These parameters have an influence on the droplet coalescence which is another process shaping the droplet size distribution in the studied conditions. The results can deepen the understanding of the mist dynamics which can be applied in various fields of colloidal science and technology.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 32-40
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of metal oxide-water nanofluids by the two-step method
Otrzymywanie nanopłynów tlenków metali w wodzie metodą dwustopniową
Autorzy:
Drzazga, M.
Lemanowicz, M.
Dzido, G.
Gierczycki, A.
Powiązania:
https://bibliotekanauki.pl/articles/2071742.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
nanopłyn
rozkład ziarnowy
potencjał zeta
nanofluid
particle size distribution
PSD
zeta potential
Opis:
Nanofluids, i.e. suspensions of nanoparticles in base fluid, may be prepared either by the one- or two-step method. In the one-step method nanoparticles are synthesized directly in base fluid. In the two-step method nanoparticles prepared as a powder are suspended in base fluid. Influence of sonication time, stabilizer and pH on stability, particle size distribution and zeta potential of CuO- and Al2O3-water nanofluids prepared by the two-step method is presented in the paper.
Nanopłyny, czyli zawiesiny nanocząstek w płynie bazowym, mogą być otrzymywane metodą jedno- i dwustopniową. W metodzie jednostopniowej nanocząstki otrzymuje się bezpośrednio w płynie bazowym. W metodzie dwustopniowej nanocząstki otrzymane w postaci proszku zawieszane są w płynie bazowym. Przedstawiono wpływ czasu nadźwiękawiania, rodzaju stabilizatora i pH na stabilność oraz rozkłady ziarnowe i potencjał zeta nanopłynów CuO i Al2O3 w wodzie otrzymanych metodą dwustopniową.
Źródło:
Inżynieria i Aparatura Chemiczna; 2012, 5; 213-215
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Principles and requirements for the soil texture analysis according to methods recommended by International Standard Organization [ISO]
Autorzy:
Drzymala, S
Powiązania:
https://bibliotekanauki.pl/articles/1401927.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
International Standard Organization
soil science
Polish standard
Polish Normalization Committee
soil material
particle size distribution
International Standard-ISO 11277
international standard
soil texture
Opis:
For several years now the Polish Normalisation Committee (PKN) has been angaged in the process of introduction (and implementation) of international standards complying with the Internationsl Standard Organsation (ISO) into the set of of Polish Standards.At present, in the PKN Commission of Soil Physics, a number of such standards are being prepared (translated) -including a very comprehensive standard dealing with partiele size distribution determination in soil material-ISO 11277 [6], Some principles and requirements included in this standard differ significantly from those commonly accepted and widely in use now in numerous pedologie laboratories in Poland [7,8]. Below there are some of the most important differences: (1 ) the requirement to remove organic matter from test samples (using 30% v/v solution of H2O2), (2) the requirement to remove water soluble salts and gypsum (to electrical conductivity 0,4 dS/m), (3) sample dispersion process must be longer than 18 hours. Many other requirements, of relatively lesser importance, in many cases also do not correlate with those commonly accepted in our laboratories.
Źródło:
Acta Agrophysica; 2000, 35
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja i modelowanie rozkładów wielkości cząstek dla ustalonych warunków procesu flokulacji
Identification and modeling of particle size distributions for stationary flocculation process
Autorzy:
Dyląg, M.
Kamieński, J.
Rosiński, J.
Szatko, W.
Powiązania:
https://bibliotekanauki.pl/articles/2071166.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
flokulacja
koagulacja
cząstki pierwotne
flokuły
rozkład wielkości cząstek
flocculation
coagulation
primary particles
flocs
particle size distribution
Opis:
Przedstawiono wyniki badań stężenia cząstek pierwotnych na rozkłady wielkości flokuł. W oparciu o porównanie z rozkładami rzeczywistymi uzyskanymi eksperymentalnie potwierdzono zadowalające odwzorowanie układu wielkości flokuł wyznaczonego z modelu opartego o równania bilansu populacji. Powyższe stwierdzenie dotyczy warunków stacjonarnych dla przepływów w zakresie liczb Reynoldsa 104
Investigation results of primary particles concentration influence on floe size distributions are presented in the paper. A comparison between empirical size distributions and floe sizes obtained from the population balance model equations gave a satisfactory representation. Abovementioned observations concerned steady state flow conditions in the Reynolds number range of 104
Źródło:
Inżynieria i Aparatura Chemiczna; 2010, 4; 22-23
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
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