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Wyświetlanie 1-15 z 23
Tytuł:
Microbial Leaching of Chromium From Solidified Waste Forms – a Kinetic Study
Autorzy:
Ayyappan, C. S.
Powiązania:
https://bibliotekanauki.pl/articles/124033.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Thiobacillus thiooxidans
microbial degradation
shrinking core model
Opis:
In this study, Thiobacillus thiooxidans (T. thiooxidans) was used to study the microbial stability / degradation of cement-based waste forms. The waste forms contained a chromium salt (CrCl3·6H2O), cement and other additives viz., lime and gypsum in two different proportions. The experimental samples of all the simulated waste forms showed evidence of microbial growth as indicated by substantial increase in sulfate. Chromium leached from the waste forms was found to be lowest in cement – lime solidified waste forms (0.061 mg·1-1) and highest in cement gypsum waste forms (0.22 mg·1-1) after 30 days of exposure. These values were lower than the toxicity characteristic leaching procedure (TCLP), regulatory limit (5 mg·1-1). Model equations based on two shrinking core models (acid dissolution and bulk diffusion model), were used to analyze the kinetics of microbial degradation of cement based waste forms. The bulk diffusion model was observed to fit the data better than the acid dissolution model, as indicated by good correlation coefficients.
Źródło:
Journal of Ecological Engineering; 2015, 16, 3; 36-42
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of Zn(II) ions from aqueous environment by surface modified Strychnos potatorum seeds, a low cost adsorbent
Autorzy:
Senthil, Kumar P.
Powiązania:
https://bibliotekanauki.pl/articles/949520.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
adsorption
isotherms
kinetics
shrinking core model
Zn(II)
Opis:
The surface modified Strychnos potatorum seeds (SMSP), an agricultural waste has been developed into an effective adsorbent for the removal of Zn(II) ions from aqueous environment. The Freundlich model provided a better fit with the experimental data than the Langmuir model as revealed by a high coefficient of determination values and low error values. The kinetics data fitted well into the pseudo-second order model with the coefficient of determination values greater than 0.99. The influence of particle diffusion and film diffusion in the adsorption process was tested by fitting the experimental data with intraparticle diffusion, Boyd kinetic and Shrinking core models. Desorption experiments were conducted to explore the feasibility of regenerating the spent adsorbent and the adsorbed Zn(II) ions from spent SMSP was desorbed using 0.3 M HCl with the efficiency of 93.58%. The results of the present study indicates that the SMSP can be successfully employed for the removal of Zn(II) ions from aqueous environment.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 3; 35-41
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the reaction between dolomite and nitric acid
Autorzy:
Pultar, Martin
Vidensky, Jan
Sedlarova, Ivona
Powiązania:
https://bibliotekanauki.pl/articles/109398.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dolomite
nitric acid
kinetics
dissolution
shrinking core model
Opis:
This paper is focused on the kinetics of the reaction between natural dolomite and diluted solutions of nitric acid at various temperatures. All experiments were carried out in a semi-batch reactor with an approximately constant nitric acid concentration using the pH-stat titration method. The reaction was studied in the temperature range from 293 to 353 K and the nitric acid concentration in the range from 0.001 to 0.200 mol dm-3. The strong effects of both temperature and nitric acid concentration were observed. The determined fractional values of the apparent reaction order (0.39 to 0.75) indicate a very complex reaction mechanism. In the studied concentration range, the values of the apparent activation energy increase from 30 to 58 kJ mol-1. Based on these data it can be assumed that the reaction takes place in the transitional regime with the stronger influence of chemical reaction. This assumption was verified by calculation of the nitric acid concentration on the surface of the dolomite grain using Sherwood criterion equation. The change in the role of the rate-controlling step was found for highly diluted solutions (< 0.010 mol dm-3 HNO3).
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 370-379
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic Study on the Preparation of Aluminum Fluoride Based on Fluosilicic Acid
Autorzy:
Chen, Gaoxiang
Yang, Xingdong
Qu, Jiyan
Luo, Jianhong
Zhang, Zhiye
Sun, Lan
Powiązania:
https://bibliotekanauki.pl/articles/1849322.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
kinetic study
fluosilicic acid
aluminum fluoride
uncreated-core model
Opis:
Reasonable mathematical derivation and mechanism model in the process of producing aluminum fluoride by fluosilicic acid is the key to the industrial treatment of fluorine resources in the tail gas of phosphate ore. In this work, aluminum fluoride was generated directly by fluosilicic acid to extract fl uorine from the tail gas of phosphate rock. The uncreated-core model dominated by interfacial reaction and the uncreated-core model dominated by internal diffusion-reaction were then respectively utilized to describe the reaction kinetics of the generation of aluminum fluoride. The result showed that the uncreated-core model was dominated by interface reaction and internal diffusion, the apparent reaction order n = 1, and the activation energy Ea = 30.8632 kJ . mol–1. Product characterization and kinetic analysis were employed to deduce the reaction mechanism of preparing aluminum fluoride. The theoretical basis for the low-cost recycling of fluorine resources in the tail gas of industrial phosphate ore was provided in this work.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 3; 10-16
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of particle size on chalcocite dissolution kinetics in column leaching under controlled Eh and its implications
Autorzy:
Phyo, Htet Aung
Jia, Yan
Tan, Qiaoyi
Zhao, Shenggui
Liang, Xinxing
Ruan, Renman
Niu, Xiaopeng
Powiązania:
https://bibliotekanauki.pl/articles/1449094.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
particle size
column leaching
chalcocite
shrinking core model
X-ray CT
Opis:
Natural high grade chalcocite samples were leached in column under controlled Eh, constant temperature and solution pH to investigate the effect of particle size on dissolution kinetics. Moreover, low grade ores of larger size fractions were leached in column using raffinate from the industrial heap as an irrigation solution to simulate the real heap conditions. The leaching rate of large particle sizes (31-200 mm) were very slow without inflection point which are normally present in the leaching of small particle sizes (0.054-31 mm). The effect of particle size was more remarkable in the dissolution of large particles than that of small particles during the first stage (<45% dissolution). However, the dissolution rate of the second stages (>45% dissolution) were not noticeably affected by the particle size. Results of kinetics analysis of leaching of small particles using shrinking core model indicated that the first stage was controlled by fluid diffusion and confirmed by the low activation energies (20.98 kJ/mol). The kinetics of second stage was controlled by chemical reaction and product layer diffusion and the later control became prominent with increasing particle size. Similarly, product layer diffusion was the rate-controlling step for the first and second stages of leaching of large particles. X-ray CT and SEMEDS studies observed the increasing numbers of cracks and porosity and the formation of sulfur layer on the surface of the residue samples. The findings in this study provided some useful implications to optimize the heap performance and understand the leaching behavior of large particles.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 4; 676-692
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics study and reaction mechanism for titanium dissolution from rutile ores and concentrates using sulfuric acid solutions
Autorzy:
Ismael, Mohamed H.
Mohammed, Hesham S.
El Hussaini, Omneya M.
El-Shahat, Mohamed F.
Powiązania:
https://bibliotekanauki.pl/articles/2146851.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
leaching kinetics
leaching mechanism
titanium
rutile concentrate
leaching design
shrinking
core model
Opis:
Recent developments of acid leaching of titanium concentrates and ores have produced renewed industrial and commercial interest. However, the leaching kinetics and mechanism of these concentrates and ores had received little attention. This work, therefore, addresses the leaching kinetics and mechanism of Ti from a rutile concentrate in sulfuric acid solution. The leaching reaction was controlled by diverse parameters like temperature, particle size, acid concentration, liquid/solid (L/S) ratio, and stirring speed. The leaching kinetics was investigated using the Shrinking Core Model in order to determine the optimum criteria which control the reaction. The kinetics analysis showed that the rate of dissolution of Ti increased by increasing reaction temperature, L/S ratio, and stirring speed, while it decreased upon increasing particle size. The kinetics analysis revealed that the dissolution reaction is controlled by the chemical reaction at the rutile particle surface. Applying the Arrhenius relation, the apparent energy of activation Ea for the leaching reaction was calculated to be 23.4kJ/mol. A semi-empirical overall rate equation was introduced to describe the combined effects of the process variables upon the rate of the dissolution reaction: 〖1-(1-x)〗^(1/3)=k_0 〖 C〗_([H2SO4])^0.803 〖 (dp)〗^(-0.518) 〖(L/S)〗^0.793 〖(w)〗^0.668 e^((-23400/RT)) t
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 1; 138--148
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of uranium recovery from low-grade ore by bioleaching and acid leaching
Autorzy:
Szolucha, M. M.
Chmielewski, A. G.
Powiązania:
https://bibliotekanauki.pl/articles/109808.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bioleaching
acid leaching
column leaching
low-grade ore
uranium
recovery
shrinking core model
Opis:
The objective of this work was to compare the bioleaching with the acid leaching of uranium under similar process conditions within 65 days. The low-grade uranium ore used in the experiments was collected from Radoniow’s ‘small’ dump, Poland. Bioleaching and acid leaching studies were carried out in identical columns. The isolated bacterial consortium from the Radoniow’s mine was used for the bioleaching process. A solution of sulphuric acid and H2O2 as oxidizing agent was used for the acid leaching. The extraction of uranium under acid leaching conditions reached maximum of 64±13 % w/w after 31 days. The bioleaching of uranium achieved a maximum extraction of 75±15 % w/w after 55 days. In this study an attempt was made to demonstrate the relationship between the shrinking-core model and the experimental data by plotting the fractional conversion of uranium against time.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 1; 136-149
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An alternative method to determine the diffusion coefficient for the shrinking core model
Autorzy:
Kwiatkowska-Marks, S.
Wójcik, M.
Kopiński, L.
Powiązania:
https://bibliotekanauki.pl/articles/779253.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
model kurczącego się rdzenia
sorpcja
żel alginianowy
współczynnik dyfuzji
shrinking core model
sorption
alginate gel
diffusion coefficient
Opis:
A new method to determine the effective diffusion coefficient of sorbate in sorbent granule based on the analytical solution of the shrinking core model (SCM) has been proposed. The experimental data presented by Lewandowski and Roe concerning the sorption of copper ions by alginate granules have been applied to compare the analytical and numerical methods. The results obtained by both methods are very close.
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 2; 54-56
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zajęcia z technologii informacyjnej – propozycja tematów zajęć opartych na modelu „Siedmiu filarów kompetencji informacyjnych”
Information Technology Course – Course Program Proposition Based on The SCONUL Seven Pillars of Information Literacy Core Model
Autorzy:
MOTYLIŃSKA, PAULINA
Powiązania:
https://bibliotekanauki.pl/articles/457872.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski
Tematy:
kompetencje informacyjne
szkoła wyższa
technologia informacyjna
„Siedem filarów kompetencji informacyjnych”
information literacy
higher education
information technology
Seven Pillars of Information Literacy Core Model
Opis:
Artykuł prezentuje propozycję tematów zajęć z przedmiotu „technologia informacyjna” reali-zowanego na studiach wyższych. Propozycja została oparta na modelu kształcenia kompetencji informacyjnych „Siedmiu filarów kompetencji informacyjnych”.
Article presents the Information technology course program proposition as a part of a curriculum in higher education. The proposition is based on The Seven Pillars of Information Literacy Core Model.
Źródło:
Edukacja-Technika-Informatyka; 2018, 9, 1; 333-337
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear modeling of traction transformer with coiled iron core for dynamic simulation
Nieliniowe modelowanie transformatora trakcyjnego z żelaznym rdzeniem zwijanym do dynamicznych symulacji
Autorzy:
Wilk, A.
Powiązania:
https://bibliotekanauki.pl/articles/268074.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
transformator trakcyjny
model nieliniowy
rdzeń zwijany
traction transformer
nonlinear model
coiled core
Opis:
The paper presents development of an equivalent circuit model of a traction transformer with coiled iron core intended for studies of transformer behavior in a traction drive system. The model accounts for the nonlinear B-H characteristic and anisotropic properties of the coiled core. Derivation of the model is based on the Lagrange’s energy method. Each winding is modeled by a lumped conservative element described by its corresponding nonlinear state function and a lumped linear dissipative element characterized by its resistance. Discrete values of state functions of magnetic conservative elements were obtained by finite element computations. Custom build Reduced Scale Traction Transformer (RSTT) was used for experiments and verification of its circuit mathematical model. Results of measurements and simulations were compared to verify the model. The comparisons showed good agreement between simulation and experimental results.
W artykule przedstawiono model obwodowy transformatora trakcyjnego z rdzeniem zwijanym przeznaczonego do badań trakcyjnego układu napędowego. Model zakłada nieliniowość charakterystyki B-H oraz anizotropowe właściwości rdzenia zwijanego. Model został wyprowadzony w oparciu o metodę energetyczną Lagrange�fa. Model obwodowy jest reprezentowany przez układ nieliniowych elementów zachowawczych i dyssypatywnych. Dyskretne wartości funkcji stanu elementow magnetycznych otrzymano z symulacji polowej. Zbudowany od podstaw transformator trakcyjny o zredukowanej skali został użyty jako obiekt modelowania i weryfikacji modelu matematycznego. Wyniki pomiarow i symulacji obwodowej porownano w celu weryfikacji modelu. Porownanie wykazało dobrą zgodność wyników symulacji i eksperymentów.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2009, 26; 125-128
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie modeli hostowania aplikacji na platformie ASP.NET Core
Hosting models comparison of ASP.NET Core application
Autorzy:
Zdanikowski, Kamil
Pańczyk, Beata
Powiązania:
https://bibliotekanauki.pl/articles/98310.pdf
Data publikacji:
2018
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
ASP.NET
net core
net
model hostowania
iis
kestrel
asp
hosting model
Opis:
W artykule przedstawione zostało porównanie modeli hostowania aplikacji na platformie ASP.NET Core. Dostępne modele hostowania zostały opisane i porównane, a następnie przeprowadzone zostały ich testy wydajnościowe. Dla każdego modelu zastosowano scenariusze testowe realizujące te same funkcje, a ich wydajność została określona za pomocą liczby przetwarzanych żądań na sekundę. Uzyskane rezultaty wskazują, że standardowa konfiguracja jest najmniej wydajna, a zastosowanie innej, np. IIS z serwerem Kestrel, czy same serwery Kestrel lub HTTP.sys mogą zapewnić kilkukrotny wzrost wydajności w porównaniu z modelem standardowym.
The article presents hosting models comparison of ASP.NET Core application. Available hosting models were described and compared and then performance comparison was carried out. For each model the same test scenarios were executed and their performance was determined by number of requests per second which host was able to process. The results obtained show that standard model is the least efficient one and using one of the other configurations, for example, IIS with Kestrel (in-process), Kestrel or HTTP.sys might provide even several times better performance compared to standard model.
Źródło:
Journal of Computer Sciences Institute; 2018, 8; 258-262
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear static analysis of an asphalt concrete core dam for comparison of three constitutive models
Autorzy:
Hong, Z.
Hongyan, Z.
Jianke, D.
Powiązania:
https://bibliotekanauki.pl/articles/230593.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zapora
ściana betonowo-asfaltowa
model konstytutywny
Duncan model
model double-yield-surface
dam
asphalt concrete core-wall
constitutuve model
double-yield-surface model
Opis:
The goal of this work is to compare different constitutive models in the nonlinear static characteristic analysis of asphalt concrete core dams. The Duncan E- mi model, Duncan E-B model and double-yield-surface model are three major constitutive models in the nonlinear static prediction of earth-rockfill dam. In this paper, an earth-rock fill dam with asphalt concrete core-wall in an actual hydraulic engineering is employed to compare the three models. The finite element model of the core-wall dam is proposed. Nonlinear static analysis of the dam is carried out and the static characteristics are obtained to study the differences generated from different constitutive models. Numerical results show that both the stress extremum and the stress distribution of dam body with three different models are coincident one another. In the deformation analysis of dam body and core-wall, the maximum values of sedimentation with the Duncan E-mi model and the Duncan E-B model, which are greater than the value with double-yield-surface model, are close to the practical test data though the deformation distributions with three models are in good agreement. But, the analysis results of core-wall stress with double-yield-surface model are proper and more reasonable than the other models.
Źródło:
Archives of Civil Engineering; 2012, 58, 4; 503-519
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Establishment of constitutive model and dynamic parameter analysis of rubber conveyor belt
Autorzy:
Chen, Hongyue
Liu, Siyuan
Powiązania:
https://bibliotekanauki.pl/articles/2200896.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
rubber conveyor belt
wire rope core
kinetic parameters
fitting curve
mathematical model
Opis:
A rubber conveyor belt is an essential piece of equipment in coal mine transportation. Its current motion and performance are directly affected by dynamic parameters. In this paper, a constitutive model has been established to study a rubber conveyor belt in order to analyze its dynamic characteristics. The covered rubber was considered as a classical solid model. The wire rope core was used as a Kelvin model, and a generalized constitutive mathematical model was established. Using Matlab, compariso of the fitting curve and the experimental curve was carried out to ensure reliability in an appropriate way. Meanwhile, the influence of different factors on dynamic parameters of rubber conveyor belts was also discussed by controlling the loading frequency and amplitude as well as external temperature. Finally, the experiment with the fitting curve was compared and verified, and the research results can provide a reference for this engineering field.
Źródło:
Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 365--378
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacyjne badania zachowań kinematycznych wirtualnego modelu automatu wydrążająco-tnącego do obróbki papryki
The simulation research of kinematic behavior of virtual model of core-cutting machine for pepper processing
Autorzy:
Ignasiak, Ł
Marcinkiewicz, J.
Szczepaniak, J.
Powiązania:
https://bibliotekanauki.pl/articles/337161.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
papryka
obróbka
automat wydrążająco-tnący
model wirtualny
analiza kinematyki
badania symulacyjne
pepper
processing
core-cutting machine
virtual model
kinematic analysis
simulation research
Opis:
W artykule przedstawiono analizę kinematyki automatu wydrążająco-tnącego, wchodzącego w skład linii technologicznej do obróbki papryki. Badania przeprowadzono na modelu wirtualnym w zakresie zachowań kinematycznych, w celu ustalenia parametrów pracy automatu w funkcji czasu. Badania symulacyjne pozwoliły także na określenie przemieszczeń poszczególnych mechanizmów oraz na wykrycie lub wykluczenie kolizji elementów i zespołów roboczych.
The article presents a kinematic analysis of core-cutting machine, included in technological line for pepper processing. The research was performed by use of virtual model within the scope of kinematics behaviour, in order to determine machine parameters during operation in time function. The research allowed also to define displacement of particular assemblies or detect and eliminate collisions of elements and operation assemblies.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2013, 58, 3; 214-219
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezwzględna stopa inflacji w gospodarce polskiej
The Pure Inflation Rate in the Polish Economy
Autorzy:
Brzoza-Brzezina, Michał
Kotłowski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/575677.pdf
Data publikacji:
2009-09-30
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
monetary policy
relative prices
restricted factor model
Harmonized Index of Consumer Prices (HICP)
pure inflation
core inflation
Opis:
The authors use a restricted factor model to estimate the Harmonized Index of Consumer Prices (HICP) excluding relative price changes. The index obtained in this way, referred to as pure inflation, demonstrates a stronger relationship to the central bank’s short-term interest rate than the HICP index and selected measures of core inflation. Pure inflation also has a forecasting effect on the future HICP, comparable or better than that of competing models. The estimated variable shows that changes in relative prices played a much smaller role in the recent period of rising inflation (2006-2008) than during previous inflation increases (1999-2000 and 2004-2005). This shows that inflation was mainly driven by demand pressures in 2006-2008, the authors conclude.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2009, 234, 9; 1-21
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
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