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Tytuł:
Evaluation of the Toxic Potency of Selected Cadmium Compounds on A549 and CHO-9 Cells
Autorzy:
Zapór, L.
Powiązania:
https://bibliotekanauki.pl/articles/90271.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
cadmium sulphide
cadmium chloride
cadmium oxide
siarczek kadmu
chlorek kadmu
tlenek kadmu
Opis:
Cytotoxicity of cadmium sulphide, oxide and chloride was tested using A549 and CHO-9 cells. Metabolic activity of cells (MTT test) and cell membrane permeability (NRU test) were used as cytotoxicity endpoints. The results revealed unexpectedly low toxicity of cadmium sulphide as compared to chloride and oxide. This preliminary report does not provide any explanation for this effect, but the result may nevertheless be interesting for future studies of toxicity mechanisms of cadmium compounds. First cadmium compounds caused damage or change in the permeability of cell membranes, then inhibition of metabolic activity of mitochondria. It cannot be ruled out that the cell lysosomes are at first exposed to the effect of cadmium.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 4; 573-581
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional composition of humic compounds and the capacity to bind cadmium ions from the solution by biologically and thermally processed Miscanthus giganteus biomass
Skład frakcyjny związków humusowych oraz zdolności wiązania jonów kadmu z roztworu przez biomasę Miscanthus giganteus przekształconą biologicznie i termicznie
Autorzy:
Gondek, K.
Mierzwa-Hersztek, M.
Kopec, M.
Powiązania:
https://bibliotekanauki.pl/articles/36088.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
fractional composition
humic compound
capacity
bind cadmium ion
cadmium ion
Miscanthus x giganteus
biomass
compost
biochar
cadmium sorption
Opis:
The capacity of functional groups of soil organic matter to form organometallic complexes may efficiently reduce the risk of migration of toxic ions of heavy metals in the environment. Therefore, a research was conducted to determine the effect of composting and pyrolysis of Miscanthus giganteus biomass on the quality of humic compounds and on the ability of these materials to bind cadmium ions from the solution. Both processes did not cause any significantly favorable changes in fractional composition of the humic compounds of the transformed Miscanthus giganteus biomass. In the case of the unprocessed and composted biomass, changes in cadmium sorption by the materials used in the research, depending on Cd dose and how long the sample was in contact with the solution, had a similar course, which indicates that the responses taking place directly after the application of the solution that contained Cd ions were stable. In the case of thermal processing of Miscanthus giganteus biomass, it was found that Cd content in the solution decreased with time. Lower cadmium concentrations in the extracts after separation of the biomass were determined in the series with biologically transformed Miscanthus giganteus.
Zdolność grup funkcyjnych materii organicznej do tworzenia kompleksów metaloorganicznych może wydajnie zmniejszyć ryzyko migracji jonów toksycznych metali ciężkich w środowisku. W związku z tym przeprowadzono badania, których celem było określenie wpływu kompostowania i pirolizy biomasy Miscanthus giganteus na jakość związków humusowych oraz możliwości wiązania jonów kadmu z roztworu przez te materiały. Oba procesy nie spowodowały znacząco korzystnych zmian w składzie frakcyjnym związków humusowych przekształconej biomasy Miscanthus giganteus. Przebieg zmian sorpcji kadmu przez materiały wykorzystane w badaniach, w zależności od dawki Cd i czasu kontaktu próbki z roztworem w przypadku biomasy nieprzetworzonej i przekompostowanej zachodził podobnie świadcząc o stabilnych reakcjach mających miejsce bezpośrednio po aplikacji roztworu zawierającego jony Cd. W przypadku termicznego przekształcenia biomasy Miscanthus giganteus stwierdzono zmniejszanie się zawartości Cd w roztworze wraz z upływem czasu. Mniejsze stężenia kadmu w ekstraktach po oddzieleniu biomasy oznaczono w serii z Miscanthus giganteus przekształconym biologicznie.
Źródło:
Acta Agrophysica; 2016, 23, 3
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cadmium on collagen content and solubility in rat bone.
Autorzy:
Galicka, Anna
Brzóska, Małgorzata
Średzińska, Krystyna
Gindzienski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1041563.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
rat
collagen
bone
cadmium
Opis:
The toxic action of cadmium in the bone tissue is known, but its mechanisms are still unexplained. We examined whether Cd influences collagen content and its solubility in the femoral bone of three-week-old female rats exposed to 5 or 50 mg Cd/l in drinking water. Non-cross linked collagen was extracted with 0.5 M acetic acid, and two acid-insoluble collagen fractions were extracted with pepsin and 4.0 M guanidine hydrochloride, respectively. SDS/PAGE showed the presence of two collagen types, I and V, in all three extracted fractions. Exposure of rats to Cd for 6 months increased the amount of acid-soluble collagens type I and V and decreased the level of acid-insoluble collagens. The amount of total collagen extracted from the bones of rats exposed to 50 mg Cd/l was reduced by about 14% as compared to control and those intoxicated with 5 mg Cd/l. The solubility of type I bone collagen (determined as the percentage of acetic-soluble fraction of total collagen) was increased 2.9- and 3.0-fold in rats intoxicated with 5 and 50 mg Cd/l, respectively. Similarly, the solubility of type V collagen was increased 2.3- and 2.7-fold, respectively. Our results indicate that Cd treatment affects bone collagen by decreasing its content and increasing its solubility.
Źródło:
Acta Biochimica Polonica; 2004, 51, 3; 825-829
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium Immobilization in the Rice – Paddy Soil with Biochar Additive
Autorzy:
Thi, Khac Vu
Lan, Phuong Dinh Thi
Hang, Nga Nguyen Thi
Thanh, Hoa Nguyen
Powiązania:
https://bibliotekanauki.pl/articles/2086382.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Cd
cadmium
soil contamination
rice grain
cadmium accumulation
biochar
straw
Opis:
Cadmium (Cd) is toxic for humans, but its effects on the yield and quality of rice under contaminated irrigation conditions remain uncertain. In this study, paddy soils in the Red River Delta (Vietnam) were selected for experiments with the purpose of understanding the effects of Cd contaminated irrigation water on growth, yields, and grain Cd accumulation. In addition, biochar was produced from rice husk (BRH) and rice straw for preventing Cd infiltration into rice was also studied in this experiment. A field experiment was established with applicated BRH and straw into polluted paddy soil, as a result the Cd content in grains reduced significantly. The Cd contaminated soil was added to the BRH and rice straw (RS) with six ratios, including: (1) RS 2.5%, (2) BRH 2.5%, (3) RS-BRH: 1.25–1.25%, (4) RS 5.0%, (5) BRH 5.0%, (6) RS-BRH: 2.5–2.5%, (w:w). Besides, three content levels 0.01–0.05–0.5 mg/L of Cd in irrigation water were applied throughout crop season. The results showed that the Cd accumulation in rice was in the following order: roots > stems > seeds. With 3 contaminated irrigation levels which were applied, the Cd concentrations of 0.05 mg/L and 0.5 mg/L affected plant height and yield. However, the Cd content in grains under contaminated soil condition can be controlled from 82.47–83.94% by applying a BRH ratio from 2.5–5% (w:w).
Źródło:
Journal of Ecological Engineering; 2022, 23, 4; 85--95
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of cadmium concentration and arbuscular mycorrhiza on growth, flowering and cadmium accumulation in osteospermum (Osteospermum ecklonis (DC.) Norl. 'Denebola')
Wpływ stężenia kadmu i mikoryzy arbuskularnej na wzrost, kwitnienie i akumulację kadmu w osteospermum (Osteospermum ecklonis (DC.) Norl. 'Denebola')
Autorzy:
Nowak, J.
Powiązania:
https://bibliotekanauki.pl/articles/796361.pdf
Data publikacji:
2005
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
cadmium concentration
arbuscular mycorrhiza
plant growth
flowering
cadmium accumulation
osteospermum
Osteospermum ecklonis
phytoextraction
Opis:
The influence of Cd concentration in growing substrate (0, 10, 20, 40 mg·dm⁻³) and AMF colonization of root system on growth, flowering, and Cd accumulation in osteospermum shoots were examined. Cd in the applied concentrations did not affect decorative value of osteospermum, no chlorosis or necrosis were observed on leaf margins frequently visible on leaves of other bedding plants. Cd at higher concentrations (20 and 40 mg·dm⁻³) lowered dry weights of shoots and roots in non-mycorrhizal plants. Mycorrhizal plants were lower and had lower dry weights of shoots and roots. Cd did not affect dry weights of shoots and roots in mycorrhizal plants. The effects of Cd and mycorrhization on flowering of osteospermum were negligible. Cd content of osteospermum shoots increased with the increasing content of Cd in growing substrate. Mycorrhizal plants grown in substrate containing 40 mg Cd·dm⁻³ accumulated more Cd in shoots than non-mycorrhizal plants. Obtained results showed that osteospermum is very tolerant to Cd toxicity and can accumulate great amount of Cd in shoots.
Badania miały na celu określenie wpływu zawartości kadmu w podłożu (0, 10, 20, 40 mg·dm⁻³) i mikoryzy arbuskulamej na wzrost, kwitnienie i akumulację Cd w pędach osteospermum. Cd w zastosowanych stężeniach nie obniżał wartości dekoracyjnej osteospermum, nie powodował chlorozy i nekroz na brzegach liści, wyraźnie widocznych u innych roślin rabatowych. Cd w wyższych stężeniach (20 i 40 mg·dm⁻³) powodował spadek suchej masy części nadziemnych i korzeni roślin niezmikoryzowanych. Rośliny zmikoryzowane były niższe i miały mniejszą suchą masę niż niezmikoryzowane. Cd nie obniżał suchej masy pędów i korzeni roślin zmikoryzowanych. Wpływ Cd i mikoryzacji na kwitnienie osteospermum był nieznaczny. Zawartości Cd w pędach osteospermum wzrastały wraz ze wzrostem zawartości tego pierwiastka w podłożu. Rośliny zmikoryzowane rosnące w podłożu zawierającym 40 mg Cd·dm⁻³ akumulowały znacznie więcej Cd w pędach niż rośliny niezmikoryzowane. Otrzymane wyniki wskazują, że osteospermum można zaliczyć do roślin bardzo tolerancyjnych w stosunku do kadmu i zdolnych do akumulacji znacznych ilości tego pierwiastka w pędach.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2005, 505
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overexpression of genes involved in phytochelatin biosynthesis in Escherichia coli: effects on growth, cadmium accumulation and thiol level.
Autorzy:
Wawrzyńska, Anna
Wawrzyński, Adam
Gaganidze, Dali
Kopera, Edyta
Piątek, Katarzyna
Bal, Wojciech
Sirko, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1041468.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cadmium
thiols
phytochelatin
glutathione
Opis:
In Escherichia coli, heterologous production of Schizosaccharomyces pombe phytochelatin synthase (PCS) along with overproduction of E. coli serine acetyltransferase (SAT) and γ-glutamylcysteine synthase (γECS) was achieved and resulted in the accumulation of phytochelatins in bacterial cells. Overproduction of either γECS alone or simultaneous production of all three proteins in bacterial cells were accompanied by reduced growth rate in liquid cultures. Interestingly, bacteria overproducing either γECS or both SAT and γECS (with elevated level of γ-glutamylcysteine but not of phytochelatins) were able to accumulate more cadmium per dry weight than the control. However, the most efficient cadmium accumulation was observed in bacteria with elevated levels of all three proteins: SAT, γECS and PCS. Therefore, "pushing" the entire pathway might be the most promising approach in modification of bacteria for potential bioremediation purposes because the level of intermediates, cysteine and glutathione, can limit the rate of production of phytochelatins. However, in such bacteria other metabolic process might become limiting for efficient growth.
Źródło:
Acta Biochimica Polonica; 2005, 52, 1; 109-116
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of anthocyanins on selected biochemical parameters in rats exposed to cadmium.
Autorzy:
Kowalczyk, Edward
Kopff, Anna
Fijałkowski, Paweł
Kopff, Maria
Niedworok, Jan
Błaszczyk, Jan
Kędziora, Józef
Tyślerowicz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1043634.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
anthocyanins
biochemical parameters
cadmium
Opis:
Cadmium is a dangerous occupational and environmental toxin. It accumulates in the human organism mainly in liver and kidneys. Cadmium half-life is about 10 years, so the symptoms of cadmium intoxication may occur several years after the exposure. Until now in treating intoxication with this metal chelating compounds have been used, burdened with numerous undesirable symptoms. In our investigations anthocyanins from Aronia melanocarpa were used to reduce the harmful results caused by cadmium. Administering anthocyanins with cadmium chloride resulted in a statistically significant decrease of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activity, concentration of bilirubin and urea in blood serum and decreased cadmium cumulation in liver and kidneys in relation to animals receiving cadmium chloride only.
Źródło:
Acta Biochimica Polonica; 2003, 50, 2; 543-548
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The content of total cadmium and its fractions in arable land of the Podlasie province
Zawartość kadmu ogólnego i jego frakcji w glebach gruntów ornych Podlasia
Autorzy:
Lukowski, A.
Wiater, J.
Powiązania:
https://bibliotekanauki.pl/articles/905637.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
cadmium content
total cadmium content
cadmium fraction
arable soil
soil composition
plant contamination
soil contamination
physicochemical property
Podlasie region
Opis:
The aim of this study was estimation of total cadmium content and its fractional composition in arable soils, depending on their physicochemical properties. The research material consisted of samples taken from arable soil in 81 points within then Podlasie Province. The content of total cadmium in soils and its fractional composition was determined with the BCR method. It was found that the total content of cadmium was typical for uncontaminated soils and ranged from 0.11 to 1.59 mg kg⁻¹. The percentage of acid in the soluble and exchangeable fraction fluctuated at around 10% on average. The reducible fraction comprised about 20% and oxidizable fraction 26%, on average. Most of the cadmium was in the residual fraction. The factors that influenced the fractional composition of cadmium were determined. For the very light and light soils it was mainly the content of magnesium and pH, while for medium soils it was the organic carbon and magnesium content, content of soil fraction <0.02 mm, as well as the percentage of Cd in reducible fraction.
Celem pracy było określenie zawartości ogólnej kadmu i jego składu frakcyjnego w glebach ornych w zależności od ich właściwości fizykochemicznych. Badania wykonano w oparciu o 81 próbek gleb uprawnych pobranych w woj. podlaskim. Określono w nich zawartość ogólną kadmu i jego skład frakcyjny metodą BCR. Zawartość ogólna kadmu była typowa dla gleb niezanieczyszczonych i wahała się w przedziale od 0,11 do 1,59 mg kg⁻¹. Udział kadmu we frakcji rozpuszczalnej w kwasach i wymienialnej wynosił średnio około 10%, we frakcji redukowalnej średnio około 20% i we frakcji utlenialnej średnio 26%. Najwięcej kadmu zgromadziła frakcja rezydualna. Określono czynniki, które wpływały na dystrybucję kadmu pomiędzy frakcjami. W przypadku gleb bardzo lekkich i lekkich największy wpływ miała zawartość magnezu i pH, a w przypadku gleb średnich zawartość magnezu, węgla organicznego, frakcji spławianych i udział procentowy kadmu we frakcji redukowalnej.
Źródło:
Polish Journal of Soil Science; 2015, 48, 1
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium and lead levels in selected goat and sheep tissues from areas under different antropogenic pressure
Autorzy:
Mundała, P.
Szwalec, A.
Baran, A.
Kędzior, R.
Powiązania:
https://bibliotekanauki.pl/articles/101410.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
cadmium
lead
sheep
goat
organ
Opis:
The aim of the study was to compare the levels of cadmium and lead in livers, kidneys and wool / hair / of sheep and goats reared in the vicinity of the steelworks in Nowa Huta in Kraków and in the control field, Rożniatów, in which there was no emitters of heavy metals. Samples were collected post mortem from one-year old animals of one breed (within a species) and one sex, who had lived from birth in the studied areas. Both species were fed with the same fodder and have remained in the same places. Wet mineralization was applied (mixture of nitric acid (V) and chloric (VII) (3: 1)) metal determination was done by a FASA method. The levels of the metals depend on the species, on the test areas and on the collected part of the animal. Tissues from sheep contained more cadmium and lead than the tissue of goats. The highest cadmium content was found in the kidney, lower in the liver, the lowest in the hair / wool of tested animals. Goat kidneys from both areas of research and sheep kidneys from Rożniatów meet consumer standards for cadmium. However, 20% of sheep kidneys sampled from Nowa Huta district exceeded the standards for cadmium. The lead content of both species exceeded the limit in all of the kidneys and livers from Nowa Huta district. In Rożniatów the standards were not fulfilled for all kidneys and livers of goats, and all kidneys and 70% of the livers of sheep.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2016, IV/2; 1337-1346
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of cadmium ions on chitosan membranes: kinetics and equilibrium studies
Autorzy:
Zielińska, Katarzyna
Chostenko, Alexandre G.
Truszkowski, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/1035519.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
adsorption isotherm
cadmium
chitosan
membranes
Opis:
The presence of toxic heavy metals in industrial wastewater is a serious pollution problem. The ability of chitosan membranes as an adsorbent for cadmium ions in aqueous solution was studied. Experiments were carried out as function of contact time and concentration of cadmium ions. This study has shown that chitosan is capable of removing cadmium from aqueous solution. The removal efficiency depends on reaction time and concentration of cadmium. The Langmuir and Freundlich adsorption models were applied to describe the isotherms and isotherm constants. Equilibrium data agreed very well with the Langmuir model. The maximum adsorption capacity of the Langmuir isotherm equation was 94 mg/g and the Langmuir adsorption equilibrium constant was 1.6 × 10-3 dm3/mg at 25 °C.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 73-78
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of infant exposure to lead and cadmium content in infant formulas
Ocena stopnia narazenia niemowlat na pobieranie olowiu i kadmu w preparatach mleka w proszku
Autorzy:
Winiarska-Mieczan, A
Powiązania:
https://bibliotekanauki.pl/articles/14982.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
child
infant formula
cadmium
lead
infant milk formula
infant exposure
cadmium content
lead content
Opis:
Infants and little children are the highest risk group as far as the exposition to toxic metals is concerned. Newly born babies do not have effectively functioning regulatory mechanisms and the absorption of mineral elements, including toxic ones, is higher than in older children and adults. Separate, more rigorous requirements have been determined for food products for infant nutrition. Special attention is required in the case of toxic metals, including lead and cadmium, which are regarded as particularly harmful to the organism. The objective of the present work was to establish the content of lead and cadmium in powdered milk used in the nutrition of infants in the first months of their lives. Moreover, on the basis of surveys, the popularity of using milk replacement formulas was determined, as well as factors affecting this situation. All the examined preparations were labelled as “a special nutrition product”. They had been purchased in different groceries in Lublin in October 2007, all before their use-by date. The shares of Pb and Cd were marked in the samples. It was demonstrated that only two preparations did not comply with the recommendations regarding the content of cadmium, while in the other samples the maximum value was not exceeded. It was also noted that the analysed preparations were not safe for babies as far as the content of lead was concerned. At the same time, it was observed that as many as 87% babies were breast-fed, which is a positive phenomenon, whereas 40% women used combined nutrition for their children (breast feeding alternately with powdered milk). The choice of a particular preparation resulted in the first place from the doctor’s recommendations, and next from babies’ preferences and friends’ opinions.
Niemowlęta oraz małe dzieci to grupa populacji o najwyższym ryzyku narażenia na toksyczne działanie metali. U noworodków zaraz po urodzeniu brak jest sprawnie działających mechanizmów regulacyjnych, a wchłanianie składników mineralnych, w tym także pierwiastków toksycznych, jest większe niż u dzieci starszych i osób dorosłych. Ustalono odrębne, bardziej rygorystyczne wymagania dla produktów spożywczych przeznaczonych do żywienia niemowląt. Szczególnej uwagi wymagają metale szkodliwe, do których zalicza się m.in. ołów i kadm, uznawane za szczególnie niebezpieczne dla organizmu. Celem pracy było ustalenie zawartości ołowiu i kadmu w mleku w proszku stosowanym w żywieniu niemowląt w pierwszych miesiącach życia. Ponadto na podstawie badań ankietowych określono popularność stosowania preparatów mlekozastępczych oraz czynniki wpływające na ten stan. Materiał do badań stanowiły preparaty uznanych marek, przeznaczone do żywienia niemowląt w pierwszych miesiącach życia. Wszystkie badane preparaty miały adnotację „produkt specjalnego przeznaczenia żywieniowego”. Produkty zakupiono w sklepach spożywczych na terenie Lublina w październiku 2007 r., w okresie ich przydatności do spożycia. W pobranych próbach oznaczono zawartość Pb i Cd. Jedynie dwa preparaty nie spełniały wymagań odnośnie do zawartości kadmu, w pozostałych wartość dopuszczalna nie została przekroczona. Ponadto stwierdzono, że analizowane preparaty nie są bezpieczne dla niemowląt pod względem zawartości ołowiu. Jednocześnie stwierdzono, że aż 87% dzieci było karmionych piersią, co jest zjawiskiem pozytywnym, przy czym 40% kobiet stosowało żywienie mieszane (karmienie piersią naprzemiennie z mlekiem w proszku). Największy wpływ na zakup danego preparatu miała porada lekarza, następnie upodobania dziecka oraz opinia znajomych.
Źródło:
Journal of Elementology; 2009, 14, 3; 573-581
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of soil contamination with cadmium and application of neutralizing substances on the yield of oat (Avena sativa L.) and the uptake of cadmium by this crop
Autorzy:
Rolka, E.
Powiązania:
https://bibliotekanauki.pl/articles/961599.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
soil contamination
cadmium
application
neutralizing substance
yield
oat
Avena sativa
cadmium uptake
crop
Opis:
Cadmium emitted to the natural environment due to anthropogenic pressure can easily move through the trophic chain, thus posing a threat to human and animal health. Soil contamination with cadmium can cause disorders in the growth and development of plants, and therefore may have an adverse effect on the volume and quality of yields. The purpose of this study has been to evaluate the effect of soil contamination with incremental doses of cadmium together with the application of neutralizing substances on the yield of oat (Avena sativa L.) and on the content, uptake and distribution of cadmium in oat plants. The research was based on a pot experiment conducted on cv. Dragon oat, grown on soil with the grain-size composition of loamy sand. Cadmium was introduced to soil in the form of cadmium chloride, in doses equal 0, 10, 20, 30 and 40 mg Cd kg-1. In order to alleviate the negative effect of soil contamination with cadmium, neutralizing substances were used, such as compost, lime and brown coal. The statistical analysis of the results demonstrated the presence of a negative correlation between the cadmium doses and the volume of oat yields. The lowest cadmium dose (10 mg Cd kg-1 of soil) significantly decreased the yield of oat straw and roots; regarding the grain yield, it was significantly depressed by the two highest cadmium doses (30 and 40 mg Cd kg-1 of soil). Of the three neutralizing substances applied, compost had a positive effect on the quantity of grain yield, compost and brown coal affected positively the yield of straw, while soil liming significantly decreased the yield of roots. Soil contamination with cadmium significantly affected the content of cadmium, raising it in the separated parts of oat plants, of which roots contained the distinctly highest amounts of the pollutant. The highest cadmium uptake (1.50 mg Cd pot-1) was detected in oat straw, which on average accumulated 58% of this xenobiotic. All the applied substances neutralizing the soil contamination with cadmium significantly decreased the content and the uptake of this element by oat grain, straw and roots, with lime producing the strongest impact.
Źródło:
Journal of Elementology; 2015, 20, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The toxic Doppelganger: on the ionic and molecular mimicry of cadmium
Autorzy:
Chmielowska-Bąk, Jagna
Izbiańska, Karolina
Deckert, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1039533.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cadmium
mimicry
signaling
carbonic anhydrase
Opis:
Cadmium is a toxic heavy metal which can cause numerous alterations in cell functioning. Exposure to cadmium leads to generation of reactive oxygen species, disorders in membrane structure and functioning, inhibition of respiration, disturbances in ion homeostasis, perturbations in cell division, and initiation of apoptosis and necrosis. This heavy metal is considered a carcinogen by the Agency for Toxic Substances and Disease Registry. At least some of the described toxic effects could result from the ability of cadmium to mimic other divalent ions and alert signal transduction networks. This review describes the role of cadmium mimicry in its uptake, reactive oxygen species generation, alterations in calmodulin, Wnt/β-catenin and estrogen signaling pathways, and modulation of neurotransmission. The last section is dedicated to the single known case of a favorable function performed by cadmium mimicry: marine diatoms, which live in zinc deficient conditions, utilize cadmium as a cofactor in carbonic anhydrase - so far the only described cadmium enzyme.
Źródło:
Acta Biochimica Polonica; 2013, 60, 3; 369-374
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pro-inflammatory properties of cadmium
Autorzy:
Olszowski, Tomasz
Baranowska-Bosiacka, Irena
Gutowska, Izabela
Chlubek, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1039631.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
inflammatory mediators and markers
cadmium
Opis:
Cadmium is a toxic and carcinogenic heavy metal that nowadays constitutes a serious environmental health problem. The aim of this study is to review the effects of cadmium on selected inflammatory mediators and markers, such as NF-κB and AP-1 transcription factors, IL-6, TNF-α, IL-1β cytokines, IL-8 or MIP-2 chemokine, MPO, iNOS, MMPs and COX-2 enzymes, PGE2 (product of COX-2 enzyme), ICAM-1, VCAM-1 and PECAM-1 adhesion molecules, and CRP. The research strategy identified articles available in Medline, published between 1998 and 2012; we included both in vivo and in vitro studies carried out on humans and rodents. Most of the reviewed research findings suggest that cadmium in micromolar concentrations (especially in the 1-10 μM range) causes up-regulation of the mediators and markers of inflammation, and appears to have pro-inflammatory properties. However, it is worth mentioning that a contradictory or even opposite hypothesis exists, which suggests cadmium to be an anti-inflammatory factor. Further research including detailed histological analyses should solve this discrepancy. Nevertheless, it appears that the main reason for these contradictory findings is the experimental setup: different biological systems analyzed and different doses of cadmium applied.
Źródło:
Acta Biochimica Polonica; 2012, 59, 4; 475-482
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of cadmium exposure on excretion of pyridinoline and deoxypyridinoline in urine
Wpływ narażenia na kadm na wydalanie pirydynoliny i dezoksypirydynoliny z moczem
Autorzy:
Prokopowicz, Adam
Ochota, Patryk
Szuła, Magdalena
Kurek, Jolanta
Sobczak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1178721.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Tematy:
cadmium
deoksy-pyridinoline
osteoporosis
pyridinoline
Opis:
Background: Osteoporosis is a growing health concern across the world. Some epidemiological data suggest that cadmium increases risk for development of osteoporosis and lead to higher rate of fracture incidents even on low environmental exposure level. Material and methods: Cadmium in urine and bone resorption markers – total fraction of the urinary pyridynoline (Pyr) and deoxypyridinoline (DPyr) – were determined in 36 patients, who were examined for toxic effects of cadmium exposure. Additionally calcium in urine was determined. Associations between cadmium exposure and factors related to bone metabolism were estimated and Pyr and DPyr excretion were compared in three groups categorized across cadmium concentrations. Results: In the investigated group there were significant positive correlations between cadmium levels in urine and Pyr and DPyr excretion. None of the other variables correlated significantly with examined bone resorption markers excluding calcium excretion in urine. Excretion of Pyr and DPyr differed significantly between group with the lowest cadmium concentration (<1.2 μg/g creatinine) and group with the highest cadmium concentration (>1.9 μg/g creatinine), where median values of Pyr and DPyr increased by 49.8% and 37.5%, respectively. Conclusion: The results suggest that cadmium increases bone resorption processes and induce osteotoxic effects in environmental exposure level.
Wstęp: Osteoporoza jest rosnącym problemem na świecie. Niektóre badania epidemiologiczne sugerują, że kadm zwiększa ryzyko rozwoju tej choroby i prowadzi do zwiększenia ryzyka złamań kości nawet przy niskim narażeniu środowiskowym. Materiał i metody: Kadm w moczu oraz biomarkery resorpcji kostnej – całkowite frakcje pirydynoliny (Pyr) i dezoksypirydynoliny (DPyr) w moczu – były oznaczane u 36 pacjentów badanych pod kątem toksycznego działania kadmu. Dodatkowo oznaczano zawartość wapnia w moczu. Oszacowano zależności pomiędzy narażeniem na kadm a czynnikami powiązanymi z metabolizmem kości oraz porównano stężenia Pyr oraz DPyr pomiędzy grupami skategoryzowanymi względem stężenia kadmu w moczu. Wyniki: W badanej grupie wykazano statystycznie istotną pozytywną korelację pomiędzy poziomem kadmu w moczu, a ilością wydalanej Pyr i DPyr z moczem. Żadna z innych badanych zmiennych nie korelowała znacząco z markerami resorpcji kości oprócz wydalania wapnia z moczem. Zróżnicowanie wydalania Pyr i DPyr było statystycznie istotne pomiędzy grupami o najniższym (<1.2 μg/g kreatyniny) i najwyższym stężeniu kadmu w moczu (>1.9 μg/g kreatyniny), w której mediany wartości stężeń Pyr i DPyr wzrosły odpowiednio o 49,8% i 37,5%. Wnioski: Wyniki badań sugerują, że kadm wzmaga procesy resorpcji kości i działa osteotoksycznie również w narażeniu środowiskowym.
Źródło:
Medycyna Środowiskowa - Environmental Medicine; 2012, 15, 4; 17-23
1505-7054
2084-6312
Pojawia się w:
Medycyna Środowiskowa - Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytoplankton Susceptibility Towards Toxic Heavy Metal Cadmium: Mechanism and Its Recent Updates
Autorzy:
Permana, Rega
Akbarsyah, Nora
Powiązania:
https://bibliotekanauki.pl/articles/1839870.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cadmium
Heavy Metals
Phytoplankton
Toxicity
Opis:
Environmental pollution particularly heavy metal pollution into aquatic ecosystem has led to multiple damage in almost all life forms. Cadmium is one of the priority pollutant listed by United States Environmental Protection Agency or US EPA that widely known to have an adverse effect to organisms as well as human health. One type of organism that is susceptible to the effects of metal pollution is phytoplankton. Phytoplankton is a group of microalgae that are easy to find and are primary producers in aquatic environments. Phytoplankton plays an important role in aquatic ecosystems because they serve as primary producers. They are representing the water total primary productivity and reinforcing the aquatic life on the higher food chain. Thus, any threats that endangered the population of phytoplankton can lead to trophical cascade or even worse, biodiversity loss. The exposure of cadmium in high concentration to phytoplankton can lead to various impact including cell damage and disruption, biosynthesis inhibition of photosynthetic pigment (e.g. chlorophyll and carotenoid), chlorphyll degradation or known as chlorosis, thylakoid membrane degradation, inhibition of cellular metabolism and cell division. It is important to study the impact of cadmium to phytoplankton in a cellular level to better understand what mechanism lies and to what extent that the cadmium will be transferred to higher trophical organism via bioaccumulation or biomagnification.
Źródło:
World News of Natural Sciences; 2021, 38; 83-97
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the effective diffusivity of cadmium(II) in calcium alginate beads
Autorzy:
Kwiatkowska-Marks, S.
Wójcik, M.
Kopiński, L.
Powiązania:
https://bibliotekanauki.pl/articles/347047.pdf
Data publikacji:
2011
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
cadmium ions
alginate beads
effective diffusivity
Opis:
Effective diffusivity (De) of cadmium compounds was calculated in the beads. The study was carried out using two methods: a shrinking core model (SCM) method and a newly developed method named conductometric. It turned out to be a simple and effective method for the calculation of effective diffusivity of Cd(II) in alginate sorbents. The De values obtained by the two methods depended on the alginate content in the beads. However, SCM, in contrast to the conductometric method, gave De values increasing with increasing alginate levels in the beads and lower than the molecular diffusivity of Cd(II), this being inconsistent with the mechanism of diffusion in porous carriers. Hence, the conductometric method can be considered as one giving more reliable results, compared with the SCM method. Moreover, diffusion retardation coefficients for the alginate beads were calculated. Enhanced content of the biopolymer in the beads caused retardation of Cd(II) diffusion in the beads due to the decreasing calculated retardation coefficients with the increasing alginate contents in the beads.
Źródło:
Ars Separatoria Acta; 2011, 8; 11-23
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activation of phenylpropanoid pathway in legume plants exposed to heavy metals. Part II. Profiling of isoflavonoids and their glycoconjugates induced in roots of lupine (lupinus luteus) seedlings treated with cadmium and lead
Autorzy:
Pawlak-Sprada, Sylwia
Stobiecki, Maciej
Deckert, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1039920.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cadmium
isoflavonoid
lead
lupine
phenylpropanoid pathway
Opis:
We examined changes in profiles of isoflavonoids in roots of lupine (Lupinus luteus L. cv. Juno) seedlings in response to treatment with two heavy metals: cadmium (at 10 mg/l) and lead (at 150 mg/l). Overall, 21 flavonoid conjugates were identified in root extracts, some of them with up to six positional isomers. The total amount of all isoflavonoids increased by about 15 % in cadmium-treated plants and by 46 % in lead-treated ones. Heavy metals markedly increased the content of two compounds: 2'-hydroxygenistein glucoside and 2'-hydroxygenistein 7-O-glucoside malonylated. Possible functions of the identified isoflavonoids in yellow lupine exposed to heavy metal stress are discussed.
Źródło:
Acta Biochimica Polonica; 2011, 58, 2; 217-223
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and optical properties of nanocrystalline CdS films prepared by spray pyrolysis
Autorzy:
Aljarrah, Radhyah M. S.
Aljobory, Adnan H.
Powiązania:
https://bibliotekanauki.pl/articles/1179009.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cadmium Sulphide
CdS films
spray pyrolysis
Opis:
Cadmium Sulphide (CdS) thin films are produced using spray pyrolysis deposition technique. Films are annealed in air at 400, 500, and 600 K of 1 h. It characterized by X-Ray Diffraction (XRD), Atomic Force Microscope (AFM) and optical properties of CdS. XRD shows that these films are polycrystalline in nature with cubic and hexagonal crystalline structure. The crystallite size, microstrain, and dislocation density were measured. AFM shows that the total substrate surface is finely covered with uniformly distributed spherical shaped grains. Optical transmittance was shown that direct transition with band gap energy was decreased between 2.44 to 2.27 eV with annealing.
Źródło:
World Scientific News; 2017, 87; 175-190
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium acts as a silent killer of liver by inducing oxidative stress and hepatocellular injury and a possible amelioration by vitamin B12 and folic acid in rat model
Autorzy:
Banerjee, A.
Nandi, P.
Bhattacharya, C.
Kabir, Z.
Mukherjee, S.
Maji, B.K.
Powiązania:
https://bibliotekanauki.pl/articles/1918855.pdf
Data publikacji:
2019-08-26
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Cadmium
liver
hepatocellular injury
oxidative stress
Opis:
Purpose: To investigate the involvement of oxidative stress in Cadmium (Cd) induced alteration in the functional status of the liver. And to assess the efficacy of folic acid and vitamin B12 in preventing Cd-induced damage in the same. Materials and methods: The experiment was carried out for four weeks. For the experiment, 25 healthy male adult Wistar albino rats were randomly selected and were divided into five equal groups and treated as control, treated with Cd, supplemented with vitamin B12 and folic acid and in the combination of these two. After 28 days the liver function enzymes and oxidative stress parameters were measured. Results: Cd is the silent killer of the hepatic system through the induction of oxidative stress in male rats. From this investigation, it is evident that the folic acid+vitamin B12 possess significant hepatoprotective and antioxidant activity against Cd-induced hepatotoxicity in the rat model. In addition, results revealed that the folic acid alone and or in combination with vitamin B12 blunted the hepatotoxic effect significantly. Conclusions: Based on results obtained, it can be concluded that folic acid and vitamin B12 offer a protective effect in Cd-induced oxidative stress associated with hepatocellular injury. Folic acid and vitamin B12 can be considered as a potent natural antioxidant which has the capacity to provide protection against Cd-induced oxidative stress in the liver in rats. However, to elucidate the exact mechanism of this modulatory effect and to examine its potential therapeutic effects further studies are essential.
Źródło:
Progress in Health Sciences; 2019, 1; 105-117
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Cadmium using Alkaline-Treated Activated Carbon from Leucaena Leucocephala Biomass
Autorzy:
Ibrahim, W. M. H. W.
Sulaiman, Nurul Syuhada
Amini, Mohd Hazim Mohammad
Kadir, W. R. A.
Mohamed, Mazlan
Ramle, Sitti Fatimah Mhd
Bilgin, Ugur
Rahman, Wan
Powiązania:
https://bibliotekanauki.pl/articles/2125550.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
activated carbon
cadmium
Leucaena leucocephala
adsorption
Opis:
Water contamination that caused by heavy metals is a very common phenomenon in the industrial age. One of the popular way to treat metal contaminated water is by adsorption process using activated carbon as the adsorbent. This paper works on producing activated carbon by chemical means with impregnation ratios of NaOH:char (w/w) was predetermined at 1:1 (ACT1-1), 2:1 (ACT2-1) and 3:1 (ACT3-1) under activation temperature of 700°C. Considering the Leucaena leucocephala is a wildly, easy and fast grown species, with the availability throught the year, it was chosen to be used as the precursor. The properties of these activated carbons and its potential for cadmium removal from aqueus solution was analyzed. It was found that the highest surface area was recorded at 662.76 m²/g. Four parameters were studied which are contact time, the effect of pH, initial concentration of adsorbate and temperature. The equilibrium time was achieved in 40 min treatment at initial concentrations of 30 mg/l. The adsorbent exhibited good sorption potential for cadmium at pH 8.0 and equilibrium temperature of 30℃. Based on the results, this study had proved that activated carbon from Leucaena leucocephala biomass have the good potential to be used for removal of cadmium from wastewater.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1033--1036
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kadm i jego związki nieorganiczne – metoda oznaczania
Cadmium and its compounds – a determination method
Autorzy:
Surgiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/138082.pdf
Data publikacji:
2011
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
kadm
związki kadmu
metoda analityczna
narażenie zawodowe
cadmium
cadmium compounds
analytical method
occupational exposure
Opis:
Metoda polega na pobraniu kadmu i jego związków na filtr membranowy, mineralizacji filtra stężonym kwasem azotowym i oznaczeniu kadmu w roztworze przygotowanym do analizy metodą absorpcyjnej spektrometrii atomowej w płomieniu acetylen-powietrze. Oznaczalność metody wynosi 0,001 mg/m3.
This method is based on stopping cadmium and its compounds on a membrane filter, mineralizing the sample with concentrated nitric acid and preparing the solution for analysis in diluted nitric acid. Cadmium and its compounds in the solution are determined as cadmium with flame atomic absorption spectrometry. The detection limit of determined cadmium in this method is 0.001 mg/m3.
Źródło:
Podstawy i Metody Oceny Środowiska Pracy; 2011, 1 (67); 123-128
1231-868X
Pojawia się w:
Podstawy i Metody Oceny Środowiska Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of cadmium dose and form on the yield of oat (Avena sativa L.) and the metal distribution in the plant
Wpływ dawki i formy kadmu na plon i dystrybucję metalu w owsie (Avena sativa L.)
Autorzy:
Tuma, J.
Skalicky, M.
Tumova, L.
Flidr, J.
Powiązania:
https://bibliotekanauki.pl/articles/14537.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
cadmium dose
cadmium form
yield
oat
Avena sativa
metal distribution
plant
photosynthesis rate
translocation
interaction
Opis:
The influence of two levels of artificial Cd soil contamination (2 and 20 mg Cd kg-1 of soil) on the weight of oat plants, chlorophyll content in leaves, rate of photosynthesis, stomatal conductivity and transpiration rate was researched in a pot experiments with Avena sativa L. Another objective was to detect the effect of cadmium contamination of soil on the content of cadmium in the dry mass of oat panicles, stems, upper green and bottom yellow leaves and roots. The soil contamination was applied in the forms of nitrate Cd(NO3)2, chloride CdCl2 and sulphate CdSO4 2-. High correlation was found between the measured levels of photosynthesis rate, stomatal conductivity and transpiration rates, but no correlation occurred between these levels and the cadmium content in leaves. In the variants with Cd contamination, insignificantly higher levels of photosynthesis rates were observed in the measurements than in the zero variant. A 10-fold higher Cd application dose significantly manifested itself by a higher content of Cd in all the analyzed parts of plants, including generative organs. A several-fold higher Cd level was found in the roots than in other parts of the plant, whereas the lowest Cd content was observed in panicles. However, the results obtained by measuring the cadmium content in stems and green leaves were not significant. In most treatments, a notably higher Cd content was determined in bottom yellow leaves than in upper green leaves. This indicates Cd accumulation in senescent tissues and its difficult reutilization. The highest variance was discovered in treatments with the accompanying SO4 2- anion. While estimating the effect of accompanying anions on the Cd content, significant differences were observed only under the higher level of Cd contamination. The increase in the Cd content in bottom yellow leaves after CdSO4 application was significant when compared with the treatment in which Cd(NO3)2 was applied and insignificant versus the variant with CdCl2. On the other hand, a higher and more significant content of Cd in phtosynthetically active green leaves was measured in the treatment with CdCl2 than with Cd(NO3)2.
W eksperymentach z Avena sativa L. zbadano wpływ 2 poziomów sztucznego zanieczyszczenia gleby Cd (2 i 20 mg Cd kg-1 gleby) w postaci Cd(NO3)2, CdCl2 i CdSO4 2- na masę roślin owsa, zawartość chlorofilu w liściach, tempo fotosyntezy, przewodność szparkową i szybkość parowania, a także na zawartość kadmu w suchej masie wiechy, łodyg, górnych i dolnych zielonych i żółtych liści oraz korzeni. Wysoki poziom korelacji stwierdzono między mierzonymi poziomami intensywności fotosyntezy, przewodności szparkowej i szybkości transpiracji, nie wykazano jednak korelacji między tymi poziomami i zawartością kadmu w liściach. W wariantach z zanieczyszczeniem Cd zaobserwowano nieznacznie wyższy poziom fotosyntezy w pomiarach w porównaniu z wariantem zerowym. W przypadku 10-krotnie większej intensywności stosowania kadmu wykazano istotnie większą zawartość Cd we wszystkich monitorowanych częściach roślin, w tym w organach generatywnych. Kilkakrotnie wyższy poziom Cd niż w innych częściach rośliny stwierdzono w korzeniach, a najmniejszy w wiechach, jednak dane uzyskane podczas pomiaru zawartości kadmu w łodygach i zielonych liściach nie były znaczące. W porównaniu z górnymi liśćmi, zauważalnie większą zawartość Cd w większości poddanych eksperymentowi roślin stwierdzono w dolnych żółtych liściach. Wskazuje to na akumulację Cd w starzejących się tkankach i trudności z jego przetworzeniem. Największą różnicę wykazano w próbkach z anionem towarzyszącym SO4 2-. Podczas ewaluacji wpływu anionów towarzyszących na zawartość Cd istotne różnice wystąpiły jedynie w przypadku wyższego poziomu zanieczyszczenia Cd. Znaczący wzrost zawartości Cd po zastosowaniu CdSO4 zaobserwowano w dolnych żółtych liściach, w porównaniu z próbkami, w których zastosowano Cd(NO3)2 natomiast nieznaczny – w porównaniu z próbkami, w których użyto CdCl2. Zdecydowanie największą zawartość Cd w zielonych liściach o aktywnej fotosyntezie stwierdzono w roślinach poddanych działaniu CdCl2 w porównaniu z tymi, w przypadku których użyto Cd(NO3)2.
Źródło:
Journal of Elementology; 2014, 19, 3
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation and elimination of surfactant-induced interferences in anodic stripping voltammetry for the determination of trace amounts of cadmium
Autorzy:
Grabarczyk, Malgorzata
Wardak, Cecylia
Wawruch, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/24085686.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cadmium
stripping voltammetry
surfactants
Amberlite resins
Opis:
This article aims to investigate in detail to what extent surfactants affect the determination of cadmium by anodic stripping voltammetry. In recent years, the production and use of surfactants have been steadily increasing, so that their concentration in environmental water samples is rising. At the same time, it is known that organic compounds, such as surfactants, often hinder the voltammetric determination of trace elements by stripping. Non-ionic (Triton X-100, Brij 35, Tween 20, Tween 60, Tween 80), cationic (CTAB, CTAC, DTAB, HPC) and anionic (DSS, SDS) compounds were selected to investigate the effect of surfactants on the voltammetric signal of cadmium. At the same time, the extent to which the addition of Amberlite resins to the analysed solution eliminates the interfering effect of surfactants was tested. Three types of Amberlite resins XAD-2, XAD-7 and XAD-16 were selected for the study and the ratio of resin weight to solution volume was determined. Finally, the determination of cadmium in surfactant-enriched environmental samples was carried out. The recoveries obtained between 95.5 and 107%, with RSD between 3.4 and 6.2%, confirm the validity and correctness of the proposed procedure All measurements were carried out by anodic stripping voltammetry using a CNTs/SGC electrode modified with a bismuth film as the working electrode.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 170717
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium Toxicity Towards Marine Diatom Thalassiosira sp. and its Alteration on Chlorophyll-a and Carotenoid Content
Autorzy:
Wahyu, Dionisius
Hindarti, Dwi
Permana, Rega
Powiązania:
https://bibliotekanauki.pl/articles/1031551.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cadmium
Carotenoid
Chlorophyll-a
Thalassiosira sp
Opis:
Cadmium is one of the non-essential metals that have toxic effects on aquatic organisms, including diatoms. Diatoms play significant important roles in the aquatic environment, hence, the presence of cadmium will have a significance growth inhibition to its abundance. In this paper, we tried to clarify the effects of cadmium on growth, chlorophyll-a and carotenoid contents of the diatom Thalassiosira sp. Growth inhibition of the phytoplankton was determined following exposure for 96h to several different concentrations of cadmium solutions in an experiment adapted from ASEAN-Canada CPMS II. Our work shows that IC50 of growth and chlorophyll-a was around 0.32 mg/L and 0.914 mg/L, respectively. In addition, Lowest Observed Effect Concentration (LOEC) and No Observed Effect Concentration (NOEC) were 0.18 mg/L and 0.1 mg/L, respectively. In conclusion, cadmium inhibits the growth, as well as the photosynthetic pigment contents of Thalassiosira sp.
Źródło:
World News of Natural Sciences; 2020, 31; 48-57
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 307

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