Search results

1

Carbonyl and sulfhydryl groups of chicken meat proteins after dietary modulation with selenium

100%

Korzeniowska M., Króliczewska B., Kopeć W.

Open Chemistry

|

2015

|

vol. 13

|

issue 1

EN

The objective of the study was to investigate the effects of selenium modulation on the alteration of carbonyl and sulfhydryl groups in proteins in chicken breast and leg meat. Selenium, in the form of sodium selenite and selenized yeast, was applied to broiler chicken at 0.26, 0.38 and 0.50 mg Se kg-1. The alteration of protein carbonyl and sulfhydryl groups, as well as total antioxidative potential of breast and leg meat were analyzed in fresh, chilled and frozen material. Protein reactive groups were effectively protected against oxidatively induced changes (carbonyl groups formation) by dietary selenium supplementation, during frozen storage of both types of chicken muscles, either with white fibre domination (breast) or with red fibre domination (leg). The inorganic form of selenium was effective in decreasing the loss of protein sulfhydryl groups in muscles with red fibre domination during frozen storage. In conclusion, selenium compounds can be used in broiler nutrition as a protein antioxidizing agent, especially in perspective of the long storage of meat under freezing conditions.

2

Non-chromatographic methods focused on speciation of arsenic and selenium in food and environmental samples

100%

Rezende H. C., Almeida I. L. S., Coelho L. M., Coelho N. M. M., Marques T. L.

Sample Preparation

|

2014

|

vol. 2

|

issue 1

EN

Speciation is a promising and essential tool in the evaluation of the contamination of metals in food and environmental samples. In this context, information about the species of these elements is important considering that toxic effects are directly related to their chemical forms. The enormous progress in combining separation and detection techniques has enabled the effective chemical speciation. However, a possible source of error in studies of speciation occurs during sample preparation. Appropriate treatment of samples is necessary in order to ensure that interconversion between the species does not occur during the experimental procedure prior to the final analysis. In this review, methods of sample preparation for the determination of arsenic and selenium in food and environmental samples are discussed. We decided to focus on these elements since they account for around 50% of all speciation studies. Procedures including conventional extraction, microwave-assisted extraction and sonolysis are discussed as simple ways to ensure species selectivity. The main purpose of this review is to provide an update on the recent literature concerning the strategies for arsenic and selenium speciation and to critically discuss their advantages and weaknesses compared with the commonly accepted approach of combining non-chromatographic and spectroscopic techniques. The problems focused on involve sampling, sample preparation and storage, as well as changes in ‘species information’ that occur during the use of various separation technologies. These difficulties are described along with recent developments aimed at overcoming these potential issues.

3

Hydride generation atomic absorption spectrometry with insitu graphite tube trapping for the determination of Se (IV) and Se (VI) in baltic sea water samples

100%

Niedzielski P., Siepak M., Dudzińska-Huczuk B.

Open Chemistry

|

2003

|

vol. 1

|

issue 3

314-324

EN

This paper reports the results of an optimisation study for a procedure to determine the total selenium and its inorganic species, Se(IV) and Se(VI) using atomic absorption spectrometry combined with hydride generation and in-situ trapping of the analyte on the inner walls of the graphite tube. With the use of the proposed modification, a detection limit (3σ) of 0.018 ng/ml is achieved. This paper presents exemplary results, according to the proposed procedure, for selenium determination in samples of marine water. The concentrations of selenium in the samples ranged from <0.02 ng/ml to 0.16ng/ml of Se(IV) and from <0.02 ng/ml to 0.10 ng/ml of Se(VI).

4

Determination of selenium in infant foods using electrothermal atomic absorption spectrometry with direct slurry sample introduction

100%

Baralkiewicz D., El-Sayed U., Filipiak M., Gramowska H., Mleczek M.

Open Chemistry

|

2004

|

vol. 2

|

issue 2

334-346

EN

Slurry sampling electrothermal atomic absorption (SS ETAAS) was applied to the development of a sensitive and precise method for selenium determination in infant foods without sample pretreatment. Suspensions prepared in a medium containing 0.1% Triton X-100, 0.5 or 5% v/v concentrated HNO3 were directly introduced into the furnace. The accuracy of the procedure was confirmed by analysis of a standard reference material and comparison with hydride generation atomic absorption spectrometric (HGAAS) procedure. The characteristic mass is 44 pg and detection limit 0.43 μg·l−1.

5

INFLUENCE OF SELENIUM ON OXIDATIVE STRESS IN ATHLETES. REVIEW ARTICLE

88%

Sieja K., von Mach-Szczypińska J., Kois N., Ler P., Piechanowska K., Stolarska M.

Central European Journal of Sport Sciences and Medicine

|

2016

|

vol. 14

|

issue 2

87 - 92

EN

The aim of the study was to analyze the influence of selenium (Se) on the course of oxidative stress in trained athletes, on the basis of own former published studies and the reference of literature. In a number of references it was shown that the application of Se led to the diminishing of oxidative stress during the physical exercises in athletes. The application of Se to athletes − led to the increase of peroxidase glutathione the main selen − dependent enzyme. The fact of increased concentration of malondialdehyde (MDA) in blood serum, the main metabolite of lipid peroxidation can indirectly evidence about the intensity of physical endurance. This increase is significantly smaller in individuals taking exogenous antioxidative diet supplement containing Se. Moreover there is the evidence that oxidative muscles damage during physical effort could be diminished by compounds with antioxidative properties. Taking into consideration, the obtained results by many of authors empower to the conclusion that application of Se diminishes the degree of peroxidation of lipids in trained athletes.

6

THE CONTENT OF SELENIUM, POLYPHENOLS AND ANTIOXIDATIVE ACTIVITY IN SELECTED MEDICAL PLANTS FROM POLAND AND WESTERN UKRAINE

88%

Sotek Z., Białecka B., Pilarczyk B., Kruzhel B., Drozd R., Tomza-Marciniak A., Pilarczyk R., Lysak H., Bąkowska M., Vovk S.

Acta Poloniae Pharmaceutica - Drug Research

|

2018

|

vol. 75

|

issue 5

1107-1116

EN

The three aims of the study were to: 1) evaluate the content of selenium and polyphenols, and to assess the reductive potential (FRAP test) and ability to deactivate ABTS•+ cation radicals in C. officinalis, H. perforatum, M. x piperita and S. marianum from Poland and Ukraine; 2) define the diversification in concentrations of selenium and polyphenols and in levels of ABTS activity and FRAP reductive potential within the examined species in relation to their location; and 3) evaluate the inter-dependencies between selenium, total polyphenol concentration, ABTS and FRAP activity, in the examined plants. We observed differences in the content of total polyphenols and antioxidative activity between the herb species and the location. Most selenium was found in M. x piperita and S. marianum from western Ukraine, with Polish H. perforatum from Pomerania and M. x piperita from Podlasie representing the highest TP content and antioxidative potential. A clear and significant relationship between the content of Se and antioxidative activity (ABTS and FRAP), and also between total polyphenols and antioxidative activity was noted only in H. perforatum. In C. officinalis a significant relationship was noted between Se and both total polyphenols and antioxidative potential. In M. x piperita a significant dependency was found between total polyphenols and antioxidative potential. The results of our research indicate a different role of selenium as an antioxidant in H. perforatum and C. officinalis, as well as polyphenols in H. perforatum and M. x piperita in dependence on the harvesting regions.

7

SELENO-L-METHIONINE MODULATE THE TOXIC EFFECT OF NEW DOXORUBICIN METAL COMPLEXES IN PROKARYOTIC MODEL –ESCHERICHIA COLI RFM443 RECA::LUX

88%

Matejczyk M., Świderski G., Lewandowski W.

Acta Poloniae Pharmaceutica - Drug Research

|

2019

|

vol. 76

|

issue 1

115-125

EN

Abstract: The main problem of modern cancer therapy is their resistance to the drugs used and the toxicity of drugs to healthy cells of the human body. Hope is natural substances that are protective of cells and often support the action of standard anticancer chemotherapy. Among them are selenium compounds. In the present study, we examined the cytotoxic and genotoxic potency of doxorubicin (DOX) metal complexes as new anticancer drug candidates. We also measured the effect of simultaneous administration of seleno –L-methionine as biologically active agent with DOX and its complexes with Mn, Mg, Fe, Co and Ni in prokaryotic model - Escherichia coli RFM443 with plasmid transcriptional fusion of recA promoter and luxCDABE as a reporter gene. The results obtained by us, indicate high biological activity of metal complexes with doxorubicin. The strongest modulatory effect was observed using the DOX complexes with Co and Ni compared to the DOX. The DOX complexes with Mg, Mn and Fe also showed relatively high biological activity. Simultaneous bacteria culture treatment with SeMet decreased the values of the DOX and its metal complexes cyto- and genotoxic parameters. These results encourage further research to assess the value of the doxorubicin metal complexes as new cytostatic drug candidates. While SeMet may be considered as therapeutic option in cancer treatment as modulation agent in anti-cancer therapy.

8

Inhibitory effect of selenomethionine on carcinogenesis in the model of human colorectal cancer in vitro and its link to the Wnt/β-catenin pathway

88%

Korbut E., Ptak-Belowska A., Brzozowski T.

|

2018

|

vol. 65

|

issue 3

359-366

EN

Selenium compounds have been implicated as anticancer agents; however, the mechanism of their inhibitory action against cancer development has not been extensively investigated. A constitutive activation of the Wnt/β-catenin pathway is a central event in colorectal carcinogenesis. In this pathway, excessive cell proliferation is initiated by generation of β-catenin followed by overexpression of proto-oncogenes, such as c-Myc. It is believed that under physiological conditions the level of c-Myc is efficiently controlled by accessibility of the β-catenin protein through the process of phosphorylation by glycogen synthase kinase 3β (GSK-3β). Here, we determined whether selenomethionine (SeMet) can inhibit cell growth and affect the Wnt/β-catenin pathway in the HT-29 human colorectal cancer cells in vitro. The effective cytotoxic doses of SeMet have been selected after 48 h of incubation of this compound with colorectal cancer HT-29 cell line. MTT assay was used to assess cell viability and the protein and mRNA levels of β-catenin and c-Myc were determined by Western blotting and qPCR, respectively. SeMet potently inhibited growth of HT-29 cells, significantly decreased level of the β-catenin protein and mRNA concentration, down-regulated the c-Myc gene expression and up-regulated the pro-apoptotic Bax protein level. Moreover, SeMet increased the level of GSK-3β phosphorylated at serine 9 (S9) and significantly increased the level of β-catenin phosphorylated at S33 and S37. We conclude that SeMet suppresses growth of HT-29 colorectal cancer cells by a mechanism linked to the Wnt/β-catenin pathway, however, degradation of β-catenin may occur independently of GSK-3β catalytic activity and its phosphorylation status.

9

Selenium, glutathione and glutathione peroxidases in blood of patients with chronic liver diseases.

88%

Czuczejko J., Zachara B. A., Staubach-Topczewska E., Halota W., Kędziora J.

|

EN

Disturbances in the antioxidant system could play a role in pathogenesis of chronic liver disease. The aim of our study was to evaluate the levels/activities of antioxidants in blood of patients with chronic liver disease. We estimated selenium and glutathione concentrations and glutathione peroxidase activities in blood of 59 patients with chronic hepatitis B or C virus infection (group 1) and 64 patients with alcoholic, autoimmune or cryptogenic chronic liver disease (group 2). The results were compared with 50 healthy controls. Whole blood and plasma selenium and red cell glutathione concentrations were significantly lower in the patients compared with the controls. Red cell glutathione peroxidase activity was slightly reduced in both subgroups of group 1 and in group 2 with normal alanine aminotransferase values. Plasma glutathione peroxidase activity was slightly but significantly higher in patients with elevated aminotransferase values. The findings suggest that disturbances in antioxidant parameters in blood of patients with chronic liver disease may be the cause of the peroxidative damage of cells.

10

The influence of selenium and vitamin E supplementation on cytological assessment of red blood cell line of bone marrow in fallow deer kept in captivity

75%

Snarska A., Wysocka D., Rytel L., Żarczyńska K., Sobiech P., Gonkowski S.

Polish Journal of Veterinary Sciences

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2018

|

vol. 21

|

issue 3

11

Synthesis, Spectroscopic Interpretations, and Antioxidant Efficiency of Two Vital Selenium Complexes

75%

Al-Khodir F.

Acta Physica Polonica A

|

2017

|

vol. 132

|

issue 4

1265-1271

EN

This paper aimed to synthesis, spectroscopic characterizations, and antioxidant assessment of two new selenium complexes with nicotinamide (Nic) and riboflavin (RF) as drug chelates. The speculated structures of the synthetic selenium complexes have been discussed by using different tools of spectroscopic analyses like infrared, the Raman, electronic, ¹H-NMR, and mass. Accordingly, the Fourier transform infrared and ¹H-NMR spectra, the mode of complexation is supported, as four molecules of nicotinamide drug act as a monodentate chelate through the N-atom of the pyridine ring with [Se(Nic)₄]·H₂O formula. The two riboflavin drug molecules coordinated to selenium metal as a bidentate chelate through azomethine nitrogen of pyrazine ring and O-atom of C=O pyrimidine-2,4-dione group with general formula [Se(RF)₂]. Both of Nic and RF chelates act as neutral charge ligands. The conductivity measurements indicated that the selenium complexes are non-electrolytes behaviors. Thermal analyses (thermal gravimetric-differential thermal analysis) of the studied complexes show that the decomposition process takes place in one broadening step with a wide temperature range. The surface morphology of the mentioned complexes was studied by scanning electron microscope and the particle size is calculated using X-ray powder diffraction. Thermodynamic kinetic parameters are calculated by using the Coats and Redfern equation. Screening of antioxidant activities of selenium complexes in vitro are assessed. The antioxidant activity is studied by three methods (DPPH assay, β-carotene/linoleic acid bleaching assay, and ferric reducing power assay), the studied complexes have a significant antioxidant activity compared to synthetic antioxidants like trolox and BHT.

12

Diphenyl diselenide and diphenyl ditelluride increase the latency for 4-aminopyridine-induced chemical seizure and prevent death in mice

75%

Brito V. B., Rocha J. B. T., Folmer V., Erthal F.

|

issue 1

125-134

EN

In this work was investigated the effect of pre-treatment with (PhSe)2 and (PhTe)2 on chemical seizure and 4-aminopyridine-induced lethality in mice. Additionally, lipid peroxidation levels of whole brain after treatment with 4-aminopyridine and effect of pre-treatment with (PhSe)2 and (PhTe)2 on these levels were investigated. Mice were pre-treated with (PhSe)2 or (PhTe)2 (50, 100, or 150 µmol/kg) 30 min before 4-aminopyridine (12 mg/kg) administration. The treatment with 4-aminopyridine caused a significant incidence of seizures (clonic, tonic) and death. Pre-treatment with (PhSe)2 and (PhTe)2 significantly increased the latency for clonic and tonic seizures, and prevented 4-aminopyridine-induced death. Significantly, the pre-treatment with (PhSe)2 or (PhTe)2 increased the latency for clonic seizures in a dose-dependent manner. Additionally, a significant increase was observed in the brain lipid peroxidation level after treatment with 4-aminopyridine, which was significantly inhibited by pre-treatment with 150 µmol/kg (PhSe)2 or (PhTe)2. These results demonstrate that (PhSe)2 and (PhTe)2 counteract the harmful effects of 4-aminopyridine. It is possible that this effect results from modulation of the redox state of N-methyl-d-aspartate receptors and/or of Ca2+ channel activity with subsequent alteration in neurotransmitter release. Importantly, this study provides evidence for anticonvulsant and antioxidant properties of (PhSe)2 and (PhTe)2, which indicates a neuroprotective activity of these compounds.

13

The effect of zinc and/or vitamin E supplementation on biochemical parameters of selenium-overdosed rats

75%

Melčová M., Száková J., Mlejnek P., Tlustoš2 V. Z. A. F. L. P. J. Z. O. M. A. K. K. M. P., Melčová M., Száková J., Mlejnek P., Tlustoš2 V. Z. A. F. L. P. J. Z. O. M. A. K. K. M. P.

Polish Journal of Veterinary Sciences

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2018

|

vol. 21

|

issue 4

14

Red blood cell and plasma glutathione peroxidase activities and selenium concentration in patients with chronic kidney disease: A review

75%

Zachara B. A., Gromadzińska J., Wąsowicz W., Zbróg Z.

|

2006

|

vol. 53

|

issue 4

663-677

EN

The metabolism of oxygen in aerobic organisms leads to generation of reactive oxygen species (ROS). These entities are able to oxidize almost all classes of macromolecules, including proteins, lipids and nucleic acids. The physiological level of ROS is usually regulated by antioxidant defense mechanisms. There are at least three groups of antioxidant enzymes: superoxide dismutases, catalases and glutathione peroxidases (GSH-Pxs) which neutralize ROS. The trace elements (copper, zinc and selenium) bound to the active sites of the above listed enzymes play an important role in the antioxidant defense system. In mammals, a major function of selenium (Se) and Se-dependent GSH-Pxs is to protect cells from oxidative stress. Selenium concentrations and GSH-Px activities are altered in blood components of chronic kidney disease (CKD) patients. The Se level is frequently lower than in healthy subjects and the concentration very often decreases gradually with advancing stage of the disease. Studies on red cell GSH-Px activity in CKD patients reported its values significantly lower, significantly higher and lower or higher, but not significantly as compared with healthy subjects. On the other hand, all authors who studied plasma GSH-Px activity have shown significantly lower values than in healthy subjects. The degree of the reduction decreases gradually with the progression of the disease. High inverse correlations were seen between plasma GSH-Px activity and creatinine level. A gradual decrease in plasma GSH-Px activity in CKD patients is due to the fact that this enzyme is synthesized predominantly in the kidney and thus the impairment of this organ is the cause of the enzyme's lower activity. Se supplementation to CKD patients has a slightly positive effect in the incipient stage of the disease, but usually no effect was observed in end-stage CKD. Presently, kidney transplantation is the only treatment that may restore plasma Se level and GSH-Px activity in patients suffering from end-stage CKD. A few studies have shown that in kidney recipients, plasma Se concentration and GSH-Px activity are restored to normal values within a period of 2 weeks to 3 months following surgery and thus it can be acknowledged that Se supplementation to those patients has a positive effect on plasma GSH-Px activity.

15

The influence of short-term selenitetriglycerides supplementation on blood selenium, and hepatic, renal, metabolic and hematological parameters in dairy cows

75%

Żarczyńska K., Sobiech P., Mee J., Illek J., Żarczyńska K., Sobiech P., Mee J., Illek J.

Polish Journal of Veterinary Sciences

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2020

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vol. 23

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issue 4

16

Effect of selenium on alleviating oxidative stress in pea leaves caused by pea aphid feeding

75%

Łukaszewicz S., Politycka B., Borowiak-Sobkowiak B., Łukaszewicz S., Politycka B., Borowiak-Sobkowiak B.

Journal of Plant Protection Research

|

2021

|

vol. 61

|

issue 1

17

Effect of a single-dose parenteral selenium supplement administered to pregnant dairy cows on selenium and iron concentrations and immune status of calves

75%

Żarczyńska K., Snarska A., Rytel L., Sobiech P.

Polish Journal of Veterinary Sciences

|

2018

|

vol. 21

|

issue 2

18

Comparison of the content of selected heavy metals in the liver tissue of the wild boar (Sus scrofa), red fox (Vulpes vulpes) and red deer (Cervus elaphus), living in north-eastern Poland

75%

Cebulska K., Sobiech P., Tobolski D., Wysocka D., Janiszewski P., Zalewski D., Gugołek A., Illek J., Cebulska K., Sobiech P., Tobolski D., Wysocka D., Janiszewski P., Zalewski D., Gugołek A., Illek J.

Polish Journal of Veterinary Sciences

|

2021

19

The concentration of copper, zinc, manganese and selenium in the serum and liver of goats with caprine arthritis-encephalitis

63%

Milczarek M., Czopowicz M., Szara E., Szara T., Nalbert T., Kosieradzka I., Kaba J., Milczarek M., Czopowicz M., Szara E., Szara T., Nalbert T., Kosieradzka I., Kaba J.

Polish Journal of Veterinary Sciences

|

2018

|

vol. 21

|

issue 4

20

Wolne rodniki, selen a padaczka u dzieci

51%

Wendorff J., Sokołowska D.

Aktualności Neurologiczne

|

2010

|

vol. 10

|

issue 1

37-41

EN

Here we present the results of our study and give the review of the literature data concerning the role of free radicals, selenium and zinc ions in children’s epilepsy and febrile seizures. Newborns and infants are at the high risk of oxidative stress and are very susceptible to imbalance between antioxidants and free radical generation system. During the phase of ischaemia and reperfusion of perinatal asphyxia, the activity of membrane Na+/K+-ATP-ase is impaired. This leads to persistent membrane depolarisation and glutamate (major excitotoxic agent) release. In 25% cases of hypoxic-ischaemic encephalopathy (HJE) cerebral palsy is diagnosed. In this condition the epilepsy coexists with cerebral palsy in 15% to 40% of cases. We have shown that the blood selenium concentration is decreased in the group of children with epilepsy treated with carbamazepine in comparison to the control group treated with valproate. This results in impairment of the oxidants and antioxidants balance. This results are concordant with literature data. In the groups of children with febrile seizures also zinc concentration were decreased. The above results suggest that the presence of seizures diminish zinc and selenium concentration but the exact mechanism of the influence of these microelements in pathogenesis and the course of epilepsy in children is not fully described.

PL

Autorzy przedstawiają wyniki własnych badań oraz przegląd piśmiennictwa na temat znaczenia wolnych rodników, selenu i cynku w padaczce oraz drgawkach gorączkowych u dzieci. Noworodki i niemowlęta wykazują zwiększone ryzyko objawów stresu tlenowego i są bardzo wrażliwe na zaburzenia równowagi między systemem antyoksydacyjnym a systemem generującym wolne rodniki. Podczas fazy niedokrwienia i reperfuzji w przebiegu okołoporodowego niedotlenienia dochodzi do uszkodzenia aktywności ATP-azy Na+/K+ w błonie komórkowej. Prowadzi to do przetrwałej depolaryzacji błony komórkowej i uwolnienia glutaminianów (głównego transmitera pobudzającego). W 25% przypadków encefalopatii niedotlenieniowo-niedokrwiennej (ENN) rozpoznaje się mózgowe porażenie dziecięce. Z kolei padaczka towarzyszy mózgowemu porażeniu dziecięcemu w 15 do 40% przypadków. Wykazaliśmy, że poziom selenu w surowicy jest obniżony u dzieci z padaczką, które otrzymywały karbamazepinę w porównaniu z grupą kontrolną leczoną kwasem walproinowym, jak również stwierdziliśmy obniżenie poziomu równowagi antyoksydacyjnej w obu grupach badanych dzieci, co jest zgodne z danymi z piśmiennictwa. W grupach dzieci z drgawkami gorączkowymi jest także obniżony poziom cynku w surowicy. Powyższe wyniki mogą sugerować, że napady drgawkowe są odpowiedzialne za obniżenie poziomu cynku i selenu, ale dokładny mechanizm wpływu selenu i cynku w patogenezie i przebiegu padaczki u dzieci nie jest w pełni poznany.

Refine search results

Carbonyl and sulfhydryl groups of chicken meat proteins after dietary modulation with selenium

Non-chromatographic methods focused on speciation of arsenic and selenium in food and environmental samples

Hydride generation atomic absorption spectrometry with insitu graphite tube trapping for the determination of Se (IV) and Se (VI) in baltic sea water samples

Determination of selenium in infant foods using electrothermal atomic absorption spectrometry with direct slurry sample introduction

INFLUENCE OF SELENIUM ON OXIDATIVE STRESS IN ATHLETES. REVIEW ARTICLE

THE CONTENT OF SELENIUM, POLYPHENOLS AND ANTIOXIDATIVE ACTIVITY IN SELECTED MEDICAL PLANTS FROM POLAND AND WESTERN UKRAINE

SELENO-L-METHIONINE MODULATE THE TOXIC EFFECT OF NEW DOXORUBICIN METAL COMPLEXES IN PROKARYOTIC MODEL –ESCHERICHIA COLI RFM443 RECA::LUX

Inhibitory effect of selenomethionine on carcinogenesis in the model of human colorectal cancer in vitro and its link to the Wnt/β-catenin pathway

Selenium, glutathione and glutathione peroxidases in blood of patients with chronic liver diseases.

The influence of selenium and vitamin E supplementation on cytological assessment of red blood cell line of bone marrow in fallow deer kept in captivity

Synthesis, Spectroscopic Interpretations, and Antioxidant Efficiency of Two Vital Selenium Complexes

Diphenyl diselenide and diphenyl ditelluride increase the latency for 4-aminopyridine-induced chemical seizure and prevent death in mice

The effect of zinc and/or vitamin E supplementation on biochemical parameters of selenium-overdosed rats

Red blood cell and plasma glutathione peroxidase activities and selenium concentration in patients with chronic kidney disease: A review

The influence of short-term selenitetriglycerides supplementation on blood selenium, and hepatic, renal, metabolic and hematological parameters in dairy cows

Effect of selenium on alleviating oxidative stress in pea leaves caused by pea aphid feeding

Effect of a single-dose parenteral selenium supplement administered to pregnant dairy cows on selenium and iron concentrations and immune status of calves

Comparison of the content of selected heavy metals in the liver tissue of the wild boar (Sus scrofa), red fox (Vulpes vulpes) and red deer (Cervus elaphus), living in north-eastern Poland

The concentration of copper, zinc, manganese and selenium in the serum and liver of goats with caprine arthritis-encephalitis

Wolne rodniki, selen a padaczka u dzieci