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Tytuł:
Determination of adsorption isotherm models for the biosorption of chromium using cherry leaves (Muntingia calabura L.)
Autorzy:
Aathithya, R.
Sowparnika, J.R.
Balakrishnan, V.
Powiązania:
https://bibliotekanauki.pl/articles/11799.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
determination
adsorption isotherm model
biosorption
chromium
cherry
leaf
Muntingia calabura
Opis:
Contaminations of industrial metals into the river possess major threat to environment. Chromium is a heavy metal which has the wide applications in tannery and electroplating industries. Above the permitted level of Chromium(VI) into surface water leads to severe health hazards. Therefore, biosorption is a technology used for the sorption of heavy metal. In this present study adsorption isotherm models was studied for the biosorption of chromium by cherry leaves. From the adsorption isotherms it was found that the experimental data fits well with the Langmuir isotherm than the Freundlich isotherm. The monolayer capacity Qm was fond to be 11.98 mg/l and the adsorption affinity was found to be positive which indicates the efficient biosorption of chromium.
Źródło:
International Letters of Natural Sciences; 2014, 20
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of thermodynamic properties for the biosorption of chromium by using cherry leaves (Muntingia calabura L.)
Autorzy:
Aathithya, R.
Sowparnika, J.R.
Balakrishnan, V.
Powiązania:
https://bibliotekanauki.pl/articles/11897.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
thermodynamic property
biosorption
chromium
cherry
leaf
Muntingia calabura
entropy
Opis:
Chromium is a heavy metal which has widely used in tannery and electroplating industries. Contaminations of these industrial metals into the river possess major threat to an environment. Therefore, biosorption is a technique which is applied for the sorption of heavy metal by a biomaterial. In the present study reveals that cherry leaves was used as a biomaterial and for that the thermodynamic properties was evaluated for the biosorption of chromium. From the thermodynamic studies it was found that the reaction was feasible, spontaneous and exothermic because the values of ΔG = negative, ΔS = negative and ΔH = positive. So, it was concluded that the experiment was thermodynamically feasible.
Źródło:
International Letters of Natural Sciences; 2014, 20
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic studies for the biosorption of chromium using cherry leaves (Muntingia calabura L.)
Autorzy:
Aathithya, R.
Sowparnika, J.R.
Balakrishnan, V.
Powiązania:
https://bibliotekanauki.pl/articles/10873.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
kinetics
biosorption
chromium
cherry
leaf
Muntingia calabura
Opis:
Biosorption is an attractive technology which is used for the sorption of substances by a biomaterial. In this present work the heavy metal chromium was subjected to biosorption because of their non-degradability nature and causes water and land pollution. Cherry leaves were used as a biomaterial for the biosorption. Kinetic studies were performed for the biosorption experiment. From the experiment it was found that the reaction follows pseudo first order reaction because of the larger value of regression coefficient R2 and lower value of standard errors (χ2) for pseudo first order reaction than second order reaction.
Źródło:
International Letters of Natural Sciences; 2014, 20
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrophysical properties of Humic Latosols from Brazil
Autorzy:
Ajayi, A.E.
Dias,Jr., M.S.
Curi, N.
Pais, P.S.-M.
Iori, P.
Powiązania:
https://bibliotekanauki.pl/articles/25530.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
organic matter
hydrophysical property
latosol soil
precompression stress
Brazil
Opis:
The hydrophysical properties of the prevalent Humic Latosols (organic matter rich and charcoal stained soils) were related to structural sustainability under loading. Intact cores collected at the Ap, AB, Bw horizons were used for hydrophysical characterization. Precompression stresses at 10 suctions were obtained to estimate the load bearing capacities. We observed the dominance of kaolinite with some occurrences of gibbsite and hydroxy-interlayered vermiculite in the clay mineralogy. The high organic matter content in the Ap horizon favours crumb structure with the structural unit presenting high porosity and water retention. The structure of the AB and Bw horizons was, however, granular with structural units having low porosity. Possible influence of earlier incidences of fire enhanced the organic matter and carbon content in the soil reducing down the profile from 42.5 g kg-1 at the Ap to 16.4 g kg-1 at the Bw horizon. The C/N ratio increased from 14 at the Ap to 17 at the Bw, and air capacity increased from 18.1% at Ap to 32.0% at Bw. Precompression stress values were: 100.6±40.7 kPa at Ap, 117.4±44.6 kPa at AB, and 116.1±58.9 kPa at Bw. Load bearing capacities at the AB and Bw horizons were homogenous.
Źródło:
International Agrophysics; 2014, 28, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A quarantine protocol against red palm weevil Rhynchophorus Ferrugineus (Olivier) (Coleptera: Curculiondae) in date palm
Autorzy:
Al-Shawaf, A.M.
Al-Shagag, A.
Al-Bagshi, M.
Al-Saroj, S.
Al-Bather, S.
Al-Dandan, A.M.
Abdallah, A.B.
Faleiro, J.R.
Powiązania:
https://bibliotekanauki.pl/articles/65957.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The red palm weevil (RPW) Rhynchophorus ferrugineus (Olivier), (Coleptera: Curculiondae) is a key pest of date palm in the Middle East. This weevil is currently being reported from over 50% of the date growing countries of the world. The date palm Phoenix dactylifera cropped area in the Middle East, has significantly increased during the last two decades where date palm is mainly propagated through offshoots. The red palm weevil larvae are often found in the offshoots, resulting in the spread of the pest and also its re-inoculation where RPW is already controlled. Currently, there are no quarantine protocols to ensure that date palm offshoots which are transported for planting, are free of RPW larvae. In this study, date palm offshoots were sprayed while still attached to the mother palm and also dipped separately with Fipronil 3.5% (Thripguard 35 SCTM) and Imidacloprid 35% (Confidor 350 SCTM) a day after detachment from the mother palm. Fipronil and Imidacloprid were tested at 0.008 % and 0.01%, respectively. Results revealed that dipping gave complete mortality of the larvae. Dipping was significantly better than spraying since spraying resulted in only partial mortality of the larvae. It was also seen that dipping offshoots in Fipronil 0.004% and 0.002% for 30 and 60 min, respectively, resulted in 100% mortality of the larvae tested. Further, toxicity studies resulted in complete mortality of larvae and adults that were exposed to offshoot tissue that was dipped in Fipronil at the above concentrations. For this reason, it is recommended to dip date palm offshoots in 0.004% Fipronil for 30 min before transporting to ensure complete mortality of the hidden larval stages, if any and complete certification and transport of the treated offshoots to the new planting site within 72 h of treatment.
Źródło:
Journal of Plant Protection Research; 2013, 53, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytochemical potential of Ficus species for the control of the phytonematode Meloidogyne javanica
Autorzy:
Alves, J.R.
De Assis, J.N.
Padua, C.C.A.
Balbino, H.M.
Lima, L.L.
De Souza Gouveia, A.
Vital, C.E.
Buonicontro, D.S.
De Freitas, L.G.
Leite, J.P.V.
De Oliveira Ramos, H.J.
Powiązania:
https://bibliotekanauki.pl/articles/2082765.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gas chromatography/mass spectrometry (GC/MS)
metabolite profiling
pest
control
phytochemistry
Opis:
Root-knot nematodes, genus Meloidogyne, are among the most plant damaging pathogens worldwide. The action of natural products against plant pathogens has been investigated to assess their effectiveness in the control of diseases. Thus, the present study aimed to evaluate the phytochemistry potential of the Ficus species for the control of Meloidogyne javanica. In vitro inhibitory activity assays were performed with crude ethanolic extracts of leaves and branches from 10 Ficus species. Among these, Ficus carica extracts exhibited strong paralysis activity against second stage juveniles (J2) (EC50 = 134.90 μg ∙ ml–1 ), after 72 hours. In addition, high efficacy was observed in egg-hatching inhibition at different embryonic stages. Microscopy analysis revealed severe morphological alterations in the nematode tissues at the J2 stage, as well as immotility of juveniles released from eggs in the presence of F. carica extracts. The efficacy of the treatments for the other species was very low. These differences were supported by the variation in the compound classes, mainly for alkaloids and metabolite profiles by Gas Chromatography/Mass Spectrometry (GC/MS) when F. carica was compared with the other species. The results indicated that F. carica is a promising source for the isolation and identification of molecules capable of acting in the control of M. javanica.
Źródło:
Journal of Plant Protection Research; 2020, 60, 2; 193-206
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elliptic flow at RHIC with NeXSPheRIO
Autorzy:
Andrade, R.
Grassi, F.
Hama, Y.
Kodama, T.
Socolovski Jr., O.
Tavares, B.
Powiązania:
https://bibliotekanauki.pl/articles/148386.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
elliptic flow
relativistic heavy-ion collisions
quark-gluon plasma
Opis:
Elliptic flow at RHIC is computed event-by-event with NeXSPheRIO. Reasonable agreement with experimental results on v2(h) is obtained. Various effects are studied as well: reconstruction of impact parameter direction, freeze-out temperature, equation of state (with or without crossover), emission mechanism.
Źródło:
Nukleonika; 2006, 51,suppl.3; 17-20
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Performance of Electrocoagulation Process in Removing Organic and Nitrogenous Compounds from Landfill Leachate in a Three-Compartment Reactor
Autorzy:
Bagastyo, Arseto Yekti
Sidik, Fahrudin
Anggrainy, Anita Dwi
Lin, Jr-Lin
Nurhayati, Ervin
Powiązania:
https://bibliotekanauki.pl/articles/2027831.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
current density
electrocoagulation
humic substance
stabilized leachate
wastewater treatment
Opis:
In this study, the effectiveness of the electrocoagulation (EC) process was evaluated based on the reduction of organic and nitrogenous contaminants in landfill leachate. A three-compartment electrochemical reactor as pre-treatment of stabilized landfill leachate was carried out ahead of biological treatment. The removal efficiencies of COD, BOD, ammonia, and nitrate were analyzed at pH 4, 6, and 8 with the current densities of $20.83$ and $29.17 mA•cm^{–2}$. At pH 4, the highest removal of COD and $NH_4^+$ was obtained, i.e., in the range of 72–81% and 43–59%, respectively. The ratio of $BOD_5$/$COD$ was increased after EC, from initially 0.11 to 0.32 at pH 4. In addition, EC effectively removed humic substances in the leachate by targeting a large amount of high molecular weight humic substances, with around $10^3$ kDa. However, the higher removal efficiency observed at higher current density leads to higher specific energy consumption. At a current density of $29.17 mA•cm^{–2}$, the specific energy consumption obtained in EC was around $10–17 Wh•g^{–1}$ COD and $99–148 Wh•g^{–1}$ $NH_4^+$. This could be decreased up to 50% at an applied current density of $20.83 mA•cm^{–2}$ with slightly lower efficiencies.
Źródło:
Journal of Ecological Engineering; 2022, 23, 2; 235-245
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheological properties of some ketchups on the Polish market
Właściwości reologiczne wybranych ketchupów na rynku polskim
Autorzy:
Bakier, S.
Bakoniuk, J.R.
Powiązania:
https://bibliotekanauki.pl/articles/36825.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The paper presents the results of rheological measurements of five selected ketchups available on the Polish market. Rheological identification was carried out in rotary shear conditions and using forced oscillation. The equilibrium flow curves (shear at constant and stepwise increasing values of shear rate) were determined, and the thixotropic effect in the form of shear hysteresis loop under conditions of shear at increasing and then decreasing shear rates. The values of the dynamic storage modulus, the loss modulus and the complex viscosity modulus were determined in dynamic measurements. The water content was also measured, and qualitative characterisation of the structure was made on the basis of photographs taken under conditions of shear interferometry. The research revealed significant differences in rheological properties and structure of the ketchups examined. All the media showed a significant thixotropic effect. The values of apparent viscosity of the ketchups did not depend on water content but primarily on the consistency stabiliser used. The presence of modified starch had a significant impact on the flow curves, and thus on the rheological properties. The presence of tomato cell walls in ketchup structure caused the appearance of discontinuity in the flow curves at low shear rates and lower storage modulus values. It was also demonstrated that the ketchups studied did not meet the Cox-Merz equation.
W pracy przedstawiono wyniki pomiarów reologicznych pięciu wybranych ketchupów dostępnych na rynku polskim. Identyfikację reologiczną prowadzono w warunkach ścinania rotacyjnego i za pomocą oscylacji wymuszonych. Wyznaczano równowagowe krzywe płynięcia (ścinanie przy stałych i skokowo rosnących wartościach szybkości ścinania) i efekt tiksotropowy w postaci pętli histerezy przy ścinaniu w warunkach rosnących, a następnie malejących szybkości ścinania. W pomiarach dynamicznych wyznaczono wartości modułu magazynowania, modułu strat i lepkości zespolonej. Mierzono również zawartość wody i jakościowo charakteryzowano strukturę na podstawie fotografii wykonanych w warunkach interferometrii birefrakcyjnej. W wyniku badań wykazano, że występują znaczące różnice we właściwościach reologicznych oraz strukturze ketchupów poddanych badaniom. Wszystkie media wykazywały znaczący efekt tiksotropowy. Wartości lepkości pozornej ketchupów nie zależały od zawartości wody, ale głównie od użytego stabilizatora konsystencji. Obecność skrobi modyfikowanej wywierała znaczący wpływ na przebieg krzywych płynięcia, a tym samym właściwości reologiczne. Obecność ścian komórkowych pomidorów w strukturze ketchupu wpływała na wystąpienie nieciągłości w krzywych płynięcia przy niskich szybkościach ścinania i niższe wartości modułu magazynowania. Wykazano również, że badane ketchupy nie spełniały równania Coxa-Merza.
Źródło:
Acta Agrophysica; 2013, 20, 2
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polityka wschodnia Unii Europejskiej jako część składowa polityki zagranicznej UE
Autorzy:
Barburska, Olga.
Współwytwórcy:
Centrum Europejskie (Uniwersytet Warszawski). Instytucja sprawcza
Oficyna Wydawnicza Aspra-JR. Wydawca
Data publikacji:
2018
Wydawca:
Warszawa : Oficyna Wydawnicza Aspra-JR
Tematy:
Unia Europejska (UE)
Partnerstwo Wschodnie
Polityka zagraniczna
Monografia
Opis:
Bibliografia, netografia na stronach 429-474. Indeks.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Design of Mealy Finite-state Machines with the Transformation of Object Codes
Autorzy:
Barkalov, A. A.
Barkalov, A. A., Jr.
Powiązania:
https://bibliotekanauki.pl/articles/908476.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
programowalny układ logiczny
automat skończony
bramka logiczna
finite state machine
programmable logic device
object
design
logic circuit
Opis:
An optimization method of the logic circuit of a Mealy finite-state machine is proposed. It is based on the transformation of object codes. The objects of the Mealy FSM are internal states and sets of microoperations. The main idea is to express the states as some functions of sets of microoperations (internal states) and tags. The application of this method is connected with the use of a special code converter in the logic circuit of an FSM. An example of application is given. The effectiveness of the proposed method is also studied.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2005, 15, 1; 151-158
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 566

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