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Tytuł:
Calculation of Thermochemical and Explosive Characteristics of Furoxanes
Autorzy:
Zhukov, I.
Kozak, G. D.
Powiązania:
https://bibliotekanauki.pl/articles/358541.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
furoxanes
benzofuroxanes
high-power energetic materials
heat of detonation
detonation velocity
detonation pressure
Opis:
Search of high-power energetic materials is one primary line of development of chemical physics of combustion and explosion. Yield of such materials is usually very small, and its cost is very high. Calculation of unknown characteristics and properties is the only way out from this situation. There are different methods today that allow calculating unknown detonation performance and some of physicochemical properties. Examination of calculated detonation performance of furoxanes and benzofuroxanes compounds that are not enough investigated is presented in this work. These compounds are new high-power energetic materials. Influence of error in enthalpy of formation of these compounds on their detonation performance is also examined in this work. Furoxanes plays particular part among energetic materials. They are convenient blocks of molecules of high-power energetic materials. Joining of explosiphorus clusters of atoms are lead to obtaining of number of high-performance compounds. It is caused by flatten structure of furoxane ring, that lead to high density of compounds and are characterized by high and positive value of enthalpy of formation. Detonation performance of furoxanes was not study practically. That is why 10 furoxanes have been chosen as object of study (see Nomenclature). 7 of 10 studied furoxanes have anomalous elemental composition, because they are hydrogenfree. In order to evaluate possible error in computational detonation performance, explosive characteristics of 6 hydrogen-free energetic materials with known experimental data have been calculated.
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 3-4; 45-54
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazard of Runaway of Nitration Processes in Nitrocompounds Production
Autorzy:
Kozak, G. D.
Raikova, V. M.
Powiązania:
https://bibliotekanauki.pl/articles/357950.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
runaway
nitration
oxidation
detonation
failure diameter
sulfuric acid
Opis:
Hazard of runaway of nitration processes in nitrocompounds production was investigated. Temperature rise in DNT nitration mixes under near adiabatic conditions was measured, and derivative dT/dζ was computed. Heat evolution rate caused by nitration (primary reaction) and oxidation (secondary reaction) were examined by means of elaborated mathematical model. Limiting values of T and dT/dζ for safe process were determined. The second part of investigation concerns detonability of solutions of nitrocompound in sulfuric acid. The detonation failure diameter df and detonation velocity D of solutions of trinitrotoluene, dinitrotoluene, and trinitrobenzene in sulfuric acid and oleum have been measured in the wide range of concentrations at T = 90C. It was shown that the detonability of the nitrocompounds depends signifcantly on the sulfuric acid content. The minimum value of df for the mixture TNT/oleum is about 2 mm, i.e., 30 times less, than that for melted TNT, and practically equals to df of nitroglycerine.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 1; 21-32
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detonability of Ammonium Nitrate and Mixtures on Its Base
Autorzy:
Kuzmin, V.
Kozak, G.
Mikheev, D.
Powiązania:
https://bibliotekanauki.pl/articles/357972.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
improvised explosive
ammonium nitrate
detonability
failure detonation diameter
Opis:
Quantities of improvised explosive devices on a base of industrial explosives that were applied at criminal incidents or were withdrawn from illegal circulation were reduced on average on 9% during last decade. This tendency is explained in particular by toughening of control under circulation of commercial explosive devices. The most commonly used improvised explosives according to returns of The Forensic Science Center of Ministry of Internal Affairs are mixtures on a base of ammonium nitrate with organic fuels and aluminum powder. Quantitative and qualitative compositions of such improvised mixtures can be various. The most essential question for a criminal case investigator is argument that excepted substance is explosive one. In this connection detonability of the mixtures on base fne (particle size was near 20 microns) and granulated ammonium nitrate with some organic fuels and aluminum powder was experimentally investigated. Failure detonation diameters of systems were measured experimentally.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 4; 335-343
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Similarities and Differences in Explosion Hazards of Organic Peroxides and High Explosives: an Experimental Study
Autorzy:
Kozak, G. D.
Tsvigunov, A. N.
Akinin, N. I.
Powiązania:
https://bibliotekanauki.pl/articles/358459.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
explosion hazard
benzoyl peroxide
heat instability of burning
nitrocompounds
Opis:
Properties that cause explosion hazard of organic peroxides, hydroperoxides and nitrocompounds are examined in the article. Ability to thermal explosion initiation of benzoyl peroxide and of nitrocompounds is compared. Explosion properties of peroxides are analyzed. Measurements of burning temperature by means of micro thermocouples and the comparison of their values with the calculated ones of benzoyl peroxide and hydroperoxide of isopropyl benzene lead to the conclusion that burning of them propagates in condensed phase. It is noted that heat instability of benzoyl peroxide burning, contrary to many nitrocompounds, is absent. Burning of benzoyl peroxide is stable even in vacuum. It is noted that, although benzoyl peroxide is not applied as explosive, in some cases the explosion hazard of benzoyl peroxide heating can be bigger than that of PETN. This conclusion was made on the basis of an investigation carried out by means of DSC method. The explosion process of benzoyl peroxide and hydroperoxide of isopropyl benzene propagates in a regime reminiscent of a low velocity detonation and the explosive effects are suffcient for severe destructions during accidents. This conclusion unfortunately is confrmed by bitter experience in practice. The results of the investigation of condensed products of explosion at impact of mixtures aluminum with peroxides and with nitrocompounds by means of impact-testing machine that were carried out in this work by X-ray diffraction analysis are discussed. It was shown that if the temperature of explosion of a mixture is Tp ≥ 2200-2300 K, practically all aluminum or aluminum hydride in the mixture transformed into aluminum oxide.
Źródło:
Central European Journal of Energetic Materials; 2011, 8, 4; 249-260
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Explosion Hazard of Aromatic Organic Compounds Containing One or Two Nitrogroups
Autorzy:
Kozak, G. D.
Vasin, A. Y.
Dyachkova, A. V.
Powiązania:
https://bibliotekanauki.pl/articles/358839.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
aromatic
decomposition
heat explosion
azo-dye
Opis:
Aromatic compounds containing one or two nitrogroups use in chemical industry commercially, in the first place there are mono- and di- nitroderivatives of benzene and toluene. Some industrial incidents at heat selfignition of them, and explosive properties of them were discussed in literature. This investigation deals with explosion hazard of less investigated in this regard class nitrocompounds - azo-dyes. All azo-dyes contain azo or amino groups, two benzene circles with substituents. Some of them contain one or two nitrogroups. Nitro- and azo- groups can give explosion hazard to organic substance. Temperature of fast decomposition beginning at heating and kinetic parameters of slow decomposition were experimentally measured for nine of them. The enthalpies of formation were measured experimentally, and explosion parameters were calculated for three of them. These results gave an opportunity to calculate the temperatures of heat explosion on a base of fundamental theory of heat explosion at convection heat transfer with environment. It was found that calculated temperatures of heat explosion agreed with experimental temperatures of fast decomposition beginning at heating, the divergence was 4.5% on average. Thus it was shown that investigated azo-dyes were the weak explosives, and theory of heat explosion could be quite applied to them.
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 2; 49-55
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Instrument for Regional Economic Development: Dynamic Cluster Logistic (Sea Port) Model
Autorzy:
Kozak, Yuriy G.
Onofrei, Igor
Powiązania:
https://bibliotekanauki.pl/articles/587598.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Klastry
Konkurencyjność gospodarki
Rozwój regionalny
Zarządzanie gospodarką
Business cluster
Economy competitiveness
Management of the economy
Regional development
Opis:
This article is dedicated to the economic mechanism of the dynamic sea port logistic (transport) cluster in the economy of the Odessa region. The need to transition to the new cluster structures and their implementation into the Ukrainian economy is caused by the high degree of efficiency, as well as the influence, which the ports and logistics businesses have on the economy of the country. In this paper, models of influence of transport and logistics companies in the form of cluster on the effectiveness of foreign economic activity of the Odessa region are associated with the State Enterprise "The Odessa Sea Commercial Port". The results can be used at sea ports, transport and logistics, and other industrial enterprises, as well as to create sea port dynamic clusters. Defined and described in the paper models and mechanisms are universal, so they can be used for the calculations to improve the efficiency of foreign economic activity in different regions.
Źródło:
Studia Ekonomiczne; 2013, 162; 117-130
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cast Porous Charges on a Base of Ammonium Nitrate-Urea Eutectic
Autorzy:
Litovka, O. B.
Kozak, G. D.
Chugreeva, E. Y.
Starshinov, A. V.
Powiązania:
https://bibliotekanauki.pl/articles/358034.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
eutectic
ammonium nitrate
urea
fusion diagram
detonability
detonation velocity
Opis:
There are great number tasks of explosive technique, requiring the charges with low pressure and detonation velocity. Powerful tool of regulation of these parameters is lowering of charge density. The main goal of this work is elaboration of technology of manufacture and investigation of explosive properties of charges on a base of eutectic ammonium nitrate-urea mixtures (AN/UR) that have melting point T[m] < 100 C. The physicochemical properties of these mixtures were investigated by means of DSC method and fusion diagram of them was plotted. The composition AN/UR 80/20, that has Tm= 80-90 C was chosen for subsequent investigation. The molten composition was mixed with fine aluminum powder, portion of it was placed into paper tube. The level of a liquid was less than length of the tube. Crystallization of melted mixtures was carried out in vacuum chamber, the level of liquid increased at pumping because of expansion of air bubbles introduced with aluminum particles and reached the upper cork of tube. In such a way porous charges were formed. The dependence of charge density vs. population of tubes by melted mixtures was plotted. Calculated heat explosion of mixtures at content of aluminum Al = 10-15% is Qv = 4.5-5.3 MJ/kg, calculated detonation velocity at density ρ = 0.5-1 g/cm3 changes from D = 3.2 to 5.2 km/s. Detonability of charges was investigated experimentally. Failure diameter (df) of detonation was measured, it was df = 22 mm (ρ = 0.6-0.7 g/cm3) for charges without confinement at initiation by means of booster or blasting cap.
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 2; 57-66
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forensic Investigation of Some Peroxides Explosives
Autorzy:
Kuzmin, V. V.
Solov'ev, M. Y.
Tuzkov, Y. B.
Kozak, G. D.
Powiązania:
https://bibliotekanauki.pl/articles/358555.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
peroxide
methods of analysis
traces
volatilize
detonation
Opis:
Some of pe roxide s : t r i a c e tone t r ipe roxide (TATP) , hexamethylenetriperoxidediamine (HMTD) have been used recently as "irregular" explosives for delinquency and international terrorism purposes. The intimate knowledge of properties and methods of analysis of these substances is necessary for experts. Forensic investigations of some peroxides explosives: triacetonetriperoxide (TATP) and hexamethylenetriperoxidediamine (HMTD) were carried out in this work. The detonation process of peroxides initiation by means of pyroxylin layer ignition was investigated, velocity of detonation at apparent density (ρ HMTD = 0.38 g/cm3, ρ TATP = 0.47 g/cm3) was measured by means of a Russian fotoregister GFR-3. These data were compared with literature detonation velocity values that had been measured at larger densities. The values of detonation velocities complement each other rather well, linear dependencies of D vs. ρ found at densities ρ = 0.35-1.2 g/cm3. The high sensitivity of the investigated analytical methods, that were applied (10-5 -10<-8 g) facilitate the determination of possible times for finding traces of TATP after an explosion. Time t = 6 hours after explosion is the critical time for finding peroxides traces of TATP on a metal surface by means of analytical methods used in this work.
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 3-4; 77-85
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of damage process of containership’s side structure due to collision with a rock
Autorzy:
Porembski, G.
Kozak, J.
Powiązania:
https://bibliotekanauki.pl/articles/963393.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
collision
LS-DYNA
FEM
numerical simulation
Opis:
This paper presents methods and results of a simplified numerical simulation of collision process of containership’s side structure and a rock. Analysis of results of the modeling makes it possible to draw conclusions as to a character of the event as well as to estimate area and depth of damage caused by the penetrating rock, in order to select geometry of a filler and impermeable layer of 2nd protection barrier.
Źródło:
Polish Maritime Research; 2008, S 1; 18-21
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FORKOME - model komputerowy i jego zastosowania do prognozowania zmian krajobrazów leśych
The FORKOME model and its applications in prognosis of the forest landscape changes
Autorzy:
Kozak, I.
Potaczala, G.
Powiązania:
https://bibliotekanauki.pl/articles/86337.pdf
Data publikacji:
2006
Wydawca:
Polska Asocjacja Ekologii Krajobrazu
Tematy:
krajobraz
lasy
Bieszczady
krajobraz lesny
zmiany krajobrazu
prognozowanie
modele prognostyczne
model FORKOME
Źródło:
Problemy Ekologii Krajobrazu; 2006, 16, 1
1899-3850
Pojawia się w:
Problemy Ekologii Krajobrazu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacja przebudowy drzewostanow swierkowych w Bieszczadach za pomoca modelu Forkome
Conversion simulation of spruce stands in the Bieszczady Mountains with the aid of Forkome model
Autorzy:
Kozak, I.
Chlodek, D.
Zawadzki, A.
Kozak, H.
Potaczala, G.
Powiązania:
https://bibliotekanauki.pl/articles/45738.pdf
Data publikacji:
2007
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Bieszczady
symulacja komputerowa
model Forkome
drzewostany swierkowe
przebudowa drzewostanow
lesnictwo
modele symulacyjne
Źródło:
Leśne Prace Badawcze; 2007, 2; 7-26
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship of frequency and severity of perimenopausal symptoms on the quality of sexual life of postmenopausal women living in urban and rural areas
Autorzy:
Stadnicka, G.
Iwanowicz-Palus, G.
Pilewska-Kozak, A.B.
Powiązania:
https://bibliotekanauki.pl/articles/2087608.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
menopause
symptoms
sexuality
climacteric period
perimenopause
Opis:
Background: The changes that occur in a woman’s body during the perimenopausal period may influence feelings of attractiveness and perception of status in an intimate relationship, which may play a role in overall sexual satisfaction. Aim of the study: The present study aimed to analyze the influence of selected perimenopausal symptoms on the perception of satisfaction with sexual life in urban and rural women. Material and methods: This study included 224 women from urban areas and 106 women from rural areas who were using general practice services. Inclusion criteria were women who had not menstruated for 2–5 years. The measures used were the Menopause Rating Scale (MRS) and the Sexual Quality of Life-Female questionnaire (SQoL-F). Spearman’s rank correlation coefficient was used to assess the relationship between the severity of perimenopausal symptoms and satisfaction with sexual life. Results: A greater proportion of urban women reported symptoms in the perimenopausal period than rural women. Statistically significant correlations were observed for irritability (P = 0.03) and sexual problems (P = 0.01). However, rural women reported a greater degree of symptom severity. There was a statistically significant difference in severity of somatic and psychological symptoms between urban and rural women. In urban women, the average score for general satisfaction with their sexual life was 62 ± 19.96, whereas the average score for rural women was slightly less, 59 ± 23.56. A statistically significant inverse relationship was observed between the severity of perimenopausal symptoms and quality of sexual life, with values of Spearman’s rank correlation coefficients ranging from −0.490 to −0.064. Conclusions: Urban or rural residence had a slight influence on the frequency and severity of perimenopausal symptoms, and severity of symptoms had a significant influence on women’s satisfaction with their sexual life.
Źródło:
Medical Science Pulse; 2020, 14, 4; 4-10
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania modelowe efektywności funkcjonowania separatora fazy stałej ścieków deszczowych
Modeling the efficiency of storm water solid phase separator
Autorzy:
Kozak, B.
Widomski, M. K.
Łagód, G.
Powiązania:
https://bibliotekanauki.pl/articles/126008.pdf
Data publikacji:
2014
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
separator fazy stałej
ścieki deszczowe
modelowanie numeryczne
solid phase separator
storm water
numerical modeling
Opis:
Odprowadzanie ścieków deszczowych z terenów zurbanizowanych związane jest z koniecznością przeciwdziałania zrzutowi znacznych ładunków zanieczyszczeń, w tym zawiesiny łatwo opadającej i ropopochodnych oraz tłuszczów, do odbiorników ścieków. W tym celu, przed skierowaniem ścieków do kanalizacji deszczowej, stosowane są różnego rodzaju separatory mające za zadanie oddzielić i zatrzymać fazy rozproszone - ciekłą i stałą. Efektywność ich pracy jest zatem miarą ochrony wód odbiorników ścieków deszczowych. Praca niniejsza przedstawia wyniki trójwymiarowych badań modelowych efektywności pracy prostego separatora fazy stałej oczyszczającego ścieki deszczowe. Badania modelowe zostały przeprowadzone w komercyjnym programie CFD Fluent Ansys Inc. Zaprezentowane obliczenia symulacyjne objęły przepływ ścieków deszczowych zawierających trzy frakcje fazy rozproszonej. Zastosowano trzy zróżnicowane prędkości przepływu ścieków deszczowych oraz trzy średnice ziaren fazy rozproszonej charakterystyczne dla frakcji piaskowej, pylastej i ilastej. Czas trwania odwzorowywanego zjawiska przepływu ścieków przez separator oraz zawartość procentową danej frakcji oparto o wartości charakterystyczne dla warunków lubelskich. Wyniki zaprezentowanych obliczeń numerycznych obejmowały rozkład prędkości przepływu wody i poszczególnych badanych frakcji przez separator, a także masę oraz rozkład przestrzenny zatrzymanych osadów w objętości zbiornika. Przeprowadzone badania umożliwiły ocenę skuteczności zatrzymywania poszczególnych frakcji oraz kształt objętości czynnej zbiornika separatora w funkcji prędkości przepływu. Ze względu na brak walidacji modelu otrzymane wyniki należy traktować jako wyniki badań wstępnych.
Storm water management in urbanized areas is directly connected to limiting the significant discharge of pollutants, including TSS, fats and oil derivatives, to the receivers. Thus, the various types of separators allowing to separate and retain the dispersed solid or liquid phase are applied before surface runoff waters enter the storm water system. Therefore, their efficiency is a measure of storm water receiver quality protection. This paper presents the results of three dimensional modeling studies concerning the operation efficiency of simple solid phase separator treating storm water. Our numerical researches were performed in the commercial CFD (computational fluid dynamics) software Fluent Ansys Inc. The presented numerical simulations covered flow of storm water containing there factions of dispersed fraction through the solid phase separator. Three velocities of flow and three particles’ dimensions representative for sand, silt and clay fractions were applied. Time duration of modeled storm water flow as well as percentage distribution of applied solid phases were based on values typical for Lublin region. Results of our numerical calculations covered velocities of flow distribution for storm water and tested solid phases as well as the accumulated masses and spatial development of retained solid phases particles inside the separator’s water body. The performed numerical simulations allowed assessment of retaining efficiency for the applied solid phase fraction and shape of separator’s active volume as a function of storm water velocity of flow. The lacking validation of our modeling attempt influences the fact that our studies should be treated as preliminary.
Źródło:
Proceedings of ECOpole; 2014, 8, 2; 542-547
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The SAXS and Rheological Studies of HEWL Amyloid Formation
Autorzy:
Szymańska, A.
Ślósarek, G.
Hornowski, T.
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1812257.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cf
87.14.E-
Opis:
We performed small angle X-ray scattering and rheological experiments in order to analyze the aggregation and denaturation processes of hen egg white lysozyme initiated by the presence of ethanol molecule. At low ethanol concentrations (below 60% (v/v)) we did not observe any change of the radius of gyration of lysozyme and no drastic changes in viscosity of the protein solution. With the increase in ethanol concentration up to the final concentration of 85% (v/v) the viscosity of protein solution dramatically increased. For high ethanol concentration a pseudoplastic behavior of lysozyme solution was observed, indicating a process of aggregation and reorientation of the protein molecules. Similar effects were observed in small angle X-ray scattering experiments. We assume that the analysis of the aggregation processes of the hen egg white lysozyme could contribute to our understanding of the mechanism of lysozyme amyloid formation.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 447-454
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The relation of pH to degree of base saturation of soils
Relacja pH do stopnia nasycenia gleb zasadami
Autorzy:
Jozefaciuk, G
Stawinski, J
Kozak, E
Glinski, J
Powiązania:
https://bibliotekanauki.pl/articles/805127.pdf
Data publikacji:
1994
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
gleby
gleby kwasne
zakwaszenie
kompleks sorpcyjny
wysycenie zasadami
odczyn gleby
Opis:
The relationships between base saturation (BS) and pH were evaluated basing on three different definitions of degree of base saturation: expressing BS in terms of the total (pH 8.2), ‘effective’ and ‘actual’ cation exchange capacities. The first two approaches lead to differentiation of BS/pH curves for different cationic as well as solid phase compositions (presence of organic matter) of exchange complex. The third approach differentiated soils only in respect to cationic composition.
Dane doświadczalne skladu jonowego kompleksu sorpcyjnego dla frakcji ilastych gleb kwaśnych przy różnych wartościach pH wykorzystano do obliczeń zależności stopnia wysycenia glebowego kompleksu sorpcyjnego jonami zasadowymi (BS) od pH przy zastosowaniu trzech różnych sposobów definiowania BS: a) wyrażając BS jako stosunek ilości zasad wymiennych (EB) do pojemności wymiennej całkowitej przy pH 8.2, b) jako stosunek EB do efektywnej pojemności wymiennej, c) jako stosunek EB do aktualnej pojemności wymiennej. Pierwsze dwa podejścia dawały w efekcie zróżnicowanie wielkości BS przy tym samym pH dla próbek o różnym składzie glebowej fazy stałej oraz dla różnych składów glebowego roztworu równowagowego. Ostatnie podejście dawało obraz bardziej jednorodny: wartość BS dla różnych próbek przy danym pH zależała jedynie od składu jonowego roztworu jednowagowego.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1994, 413; 155-159
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 31

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