Search results

1

The Biomedical Role of Zinc in the Functioning of the Human Organism

100%

Białek M., Zyska A.

Polish Journal of Public Health

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2015

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vol. 124

|

issue 3

160-163

EN

Zinc is one of the most important microelements that can be found in the human organism. It is a component or an activator of various enzymes and takes part in more than 300 enzymatic reactions. It is present in all types of human tissue. About 90% of the general amount of zinc can be found in bones and muscles, 11% in liver and skin. Zn2+ ions are stable ions in biological environment and they do not participate in redox reactions that occur inside an organism. Assimilability of this element by living organisms is varied. It depends largely on the sort of food and interactions occurring between zinc and other elements. Zinc is an essential element for normal development and maintenance of human health. The data presented in this article result from an overview of studies presented in literature published in the last five years concerning zinc transport mechanisms, the role of zinc in functioning of the human body, and also pathophysiological states caused by too low or excessive concentration of zinc in an organism.

2

Deposition of Zn-containing films using atmospheric pressure plasma jet

100%

Galmiz O., Stupavska M., Wulff H., Kersten H., Brablec A., Cernak M.

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issue 1

EN

The purpose of this work was to deposit Zn-containing films on Si substrates using the commercial atmospheric pressure plasma jet “kINPen’09.” In preliminary experiments Zn-containing films were deposited on the silicon substrates immersed in water solutions of Zn(NO3)2•6H2O salt. The surface composition of deposited films was analyzed by the XPS (X-ray photoelectron spectroscopy) technique while the bulk composition was studied by means of XRD (X-ray diffraction) mesurements. The film thickness was measured by a profilometer. We have determined that the concentration of the zinc nitrate solution as well as changes in the deposition time resulted in a large fluctuation of the deposited film thickness. However, the successful deposition of the Zn-containing films on the Si substrate was definitely confirmed.

3

Kinetics of Zinc Evaporation in Inert and Reducing Gases

88%

Łabaj J.

Archives of Metallurgy and Materials

|

2018

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vol. 63

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issue 2

4

Zinc-binding proteins from boar seminal plasma - isolation, biochemical characteristics and influence on spermatozoa stored at 4°C

88%

Mogielnicka-Brzozowska M., Wysocki P., Strzeżek J., Kordan W.

Acta Biochimica Polonica

|

2011

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vol. 58

|

issue 2

171-177

EN

Affinity chromatography on Chelating Sepharose Fast Flow Gel-Zn2+ was used for fractionation of boar seminal plasma proteins. Approximately 30% of total boar seminal plasma proteins showed affinity for zinc ions (ZnBP fraction). Native electrophoresis (PAGE) of ZnBP revealed six protein fractions which separated into 27 bands under denaturing conditions (SDS/PAGE). Two-dimensional electrophoresis (2D PAGE) showed 148 polypeptides with isoelectric points mostly in the basic and neutral pH range. The zinc-binding proteins comprise mainly 10-20 kDa polypeptides which are probably members of the spermadhesin family. ZnBP present in the incubation mixture of spermatozoa stored for 1 or 24 h at 4 °C allowed preservation of a higher percentage of cells exhibiting linear motility in comparison to a control sample stored in PBS. Presented results indicate that proteins binding Zn2+ ions have a shielding effect on the sperm plasma membrane and acrosome of spermatozoa, protecting these structures against consequences of cold shock.

5

RELEASE OF BIOACTIVE SUBSTANCES FROM FORMULATIONS CONTAINING ARTHROSPIRA PLATENSIS (SPIRULINA PLATENSIS)

88%

Muszyńska B., Lazur J., Jękot B., Krakowska A., Szewczyk A., Sułkowska-Ziaja K., Zimmer Ł., Poleszak E., Opoka W.

Acta Poloniae Pharmaceutica - Drug Research

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2018

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vol. 75

|

issue 5

1187-1199

EN

Arthrospira platensis (Spirulina platensis) is a well-known microalga and has been utilized as a medicinal agent and foodstuff by humans since at least 16th century. The aim of this study was to determine zinc content as well as determine phenolic and indole compounds from commercial preparations containing Arthrospira platensis (lyophilizate, tablets, and capsules) before and after extraction with methanol and incubation with artificial digestive juices. The secondary aim of this study was to evaluate the quality of these preparations. The samples were incubated in artificial stomach juice and in intestinal juice. The samples were mineralized and their zinc(II) ions content was estimated using flame absorption atomic spectroscopy (F-AAS). The maximum zinc(II) ions content released into the digestive juices was found to be up to 1.6 mg 100 g-1 of the preparation. Phenolic compounds identified in the examined extracts are as follows: gallic acid; protocatechuic acid; 3,4-dihydroxyphenylacetic acid; p-hydroxybenzoic acid; syringe acid; cinnamic acid; and quercetin. Furthermore, indole compounds identified were 5-hydroxy-L-tryptophan, 5-methyl-L-tryptophan, L-tryptophan, tryptamine, and 5-methyltryptamine. Consequently, it was also found that the distributed Arthrospira platensis in the form of tablets does not disintegrate in the artificial digestive juices. Among the examined preparations, only hard capsules met the requirements of the European Pharmacopeia 8th ed.

6

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

7

A comparison of sequential extraction procedures for fractionation of arsenic, cadmium, lead, and zinc in soil

75%

Tlustoš P., Száková J., Stárková A., Pavlíková D.

Open Chemistry

|

2005

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vol. 3

|

issue 4

830-851

EN

Twelve soil samples differing in physicochemical properties and total element contents were extracted by three sequential extraction procedures to determine As, Cd, Pb, and Zn bound to individual soil fractions and are defined by individual operational procedures. In the case of arsenic, two additional sequential extraction schemes were designed entirely for fractionation of soil containing arsenic were tested. The results confirmed that determination of element proportions bound to individual soil fractions is strongly dependent on the extracting agent and/or procedure applied within individual extracting schemes. As expected, absolute values of the elements released among the individual extracting procedures are weakly comparable. More reliable results were determined for the more mobile soil elements i.e. cadmium and zinc, in the fractions characterizing the most mobile proportions of investigated elements where significant correlations with basic soil characteristics were observed. In contrast, ambiguous results were observed for As and Pb, for both the individual extraction procedures and the effect of the soil characteristics. Regardless of the studied element, the poorest results were determined for reducible and oxidizable soil fractions. The application of at least two independent procedures or modification of the extraction scheme according to element investigated and/or particular soil characteristics can also be helpful in definition of element pattern in soils in further research.

8

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

|

2018

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vol. 21

|

issue 4

9

Synthesis and entomotoxicity assay of zinc and silica nanoparticles against Sitophilus granarius (Coleoptera: Curculionidae)

75%

Rouhani M., Samih M. A., Zarabi M., Beiki K., Gorji M., Aminizadeh M. R.

Journal of Plant Protection Research

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2019

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vol. 59

|

issue 1

10

Impact of composts with the participation of municipal sewage sludge on the content of the total forms of copper, manganese and zinc in soil

75%

Krzywy-Gawrońska E.

Polish Journal of Chemical Technology

|

2010

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vol. 12

|

issue 4

15-18

EN

Pot experiment was conducted in the hall of vegetation at University of Agriculture in Szczecin over the years 2001 - 2003 on the soil of IVa complex of agriculture usefulness (very good rye) numbered among loamy sand as regards to the granulometric composition. The composts used in the experiment were after 8 months of decomposition. There was more nitrogen and phosphorus in the composts in comparison with potassium. In the pattern of the research the doses of composts, corresponding with 100, 200 and 300 kg N·ha-1, i.e. 0.63; 0.99 and 0.126 g N pot were used. The experiment was conducted in four repetitions. In 2001 spring rape Licomos variety was the test plant, in 2002 it was the spring triticale Wanad variety and in 2003 oats Polar variety. In the second and third year of the research of the soil there was 0.475 g N, 0.137 g P and 0.315 g K applied into every pot. It corresponded with the doses of 150 kg N·ha-1, 43.6 P·ha-1 and 100 kg K·ha-1. Mineral fertilizers were used in the form of urea, double superphosphate, 60% potassium salt.The obtained results of the research indicate that the content of the total forms of copper, manganese and zinc in the composts, with the participation of sewage sludge fulfilled the norms concerning the organic fertilizers.Over the years, since the time of an application into the soil the composts with the participation of municipal sewage sludge, the content of the total forms of copper, manganese and zinc has decreased. It was caused by the uptake of these micronutrients by plants.

11

Effect of plant hormones on the cambial activity of Cerasus vulgaris Miller under stress conditions with Zn

75%

Yuce K., Tileklioglu B., Yuce K., Tileklioglu B.

Journal of Plant Protection Research

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2019

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vol. 59

|

issue 3

12

Zinc accumulation in lichens due to industrial emissions around Vorkuta, northeast European Russia

63%

Walker T. R., Walker T. R.

Polish Polar Research

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2008

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vol. 29

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issue 2

13

Effect of long-term fertilization of the permanent dry meadow on the zinc content in soil and meadow sward

63%

Gabryszuk M., Barszczewski J., Kuźnicka E., Sakowski T., Gabryszuk M., Barszczewski J., Kuźnicka E., Sakowski T.

Journal of Water and Land Development

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2020

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issue 47

14

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

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2018

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vol. 21

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issue 4

15

Mitochondrial respiratory chain inhibitors modulate the metal-induced inner mitochondrial membrane permeabilization

63%

Belyaeva E. A.

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vol. 57

|

issue 4

435-441

EN

To elucidate the molecular mechanisms of the protective action of stigmatellin (an inhibitor of complex III of mitochondrial electron transport chain, mtETC) against the heavy metal-induced cytotoxicity, we tested its effectiveness against mitochondrial membrane permeabilization produced by heavy metal ions Cd2+, Hg2+, Cu2+ and Zn2+, as well as by Ca2+ (in the presence of Pi) or Se (in form of Na2SeO3) using isolated rat liver mitochondria. It was shown that stigmatellin modulated mitochondrial swelling produced by these metals/metalloids in the isotonic sucrose medium in the presence of ascorbate plus tetramethyl-p-phenylenediamine (complex IV substrates added for energization of the mitochondria). It was found that stigmatellin and other mtETC inhibitors enhanced the mitochondrial swelling induced by selenite. However, in the same medium, all the mtETC inhibitors tested as well as cyclosporin A and bongkrekic acid did not significantly affect Cu2+-induced swelling. In contrast, the high-amplitude swelling produced by Cd2+, Hg2+, Zn2+, or Ca2+ plus Pi was significantly depressed by these inhibitors. Significant differences in the action of these metals/metalloids on the redox status of pyridine nucleotides, transmembrane potential and mitochondrial respiration were also observed. In the light of these results as well as the data from the recent literature, our hypothesis on a possible involvement of the respiratory supercomplex, formed by complex I (P-site) and complex III (S-site) in the mitochondrial permeabilization mediated by the mitochondrial transition pore, is updated.

16

DURABILITY OF CHITOSAN/CELLULOSE HYDROGEL BEADS REGENERATED FROM AN IONIC LIQUID IN ACIDIC AND BASIC MEDIA AND THEIR METAL ADSORPTIVE CHARACTERISTICS

63%

Matsumoto M., Ishikawa S., Kamigaki T.

Progress on Chemistry and Application of Chitin and its Derivatives

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2019

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vol. 24

145 - 150

EN

Chitosan–cellulose gel beads were regenerated from an ionic liquid, and their application to a metal adsorbent was examined. The chitosan–cellulose gel beads, which were prepared from 1-ethyl-3-methyl imidazolium acetate, were more stable in the acidic and basic aqueous solutions than cellulose or chitosan. The adsorption of copper on chitosan–cellulose gel beads was examined, and the adsorption amount of copper ion increased with pH, suggesting that amino groups on chitosan were related to adsorption. The adsorption isotherm of copper, zinc, and nickel ions was well described by the Langmuir model, and the adsorption ability of these metal ions obeyed the Irving-Williams series. Fe3+, Mn2+, and Co2+ from a buffer solution and Pt4+, Au3+, and Pd2+ from a hydrochloric acid solution were not adsorbed on the chitosan–cellulose gel beads.

17

Wpływ cynku, magnezu i witaminy D na produkcję testosteronu u mężczyzn

51%

Wrzosek M., Włodarek D., Woźniak J.

Polish Journal of Sports Medicine

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2018

|

vol. 34(3)

123-134

EN

Testosterone is the main androgenic hormone produced by Leydig cells, found mainly in testicles/ testis. The aim of this study was to review the latest research on the effects of zinc, magnesium and vitamin D on testosterone levels among male athletes..Research suggests that the optimization of zinc supply may result in enhanced androgen synthesis but only in case of an earlier deficiency of this element. Regarding magnesium, there are indications based on intervention studies that indicate the positive influence of magnesium supplementation (alone or in combination with zinc)on testosterone synthesis. Due to the presence of vitamin D receptors (VDRs) and enzymes metabolizing this vitamin in Leydig cells, the effect of providing cholecalciferol on testosterone synthesis seems probable, but the available studies do not explain the strength of this effect.

PL

Testosteron jest głównym hormonem androgennym wytwarzanym przez komórki Leydiga znajdujące się głównie w jądrach. Celem niniejszej pracy był przegląd najnowszych badań dotyczących wpływu cynku, magnezu i witaminy D na stężenie testosteronu wśród sportowców płci męskiej. Badania wskazują, iż optymalizacja podaży cynku może przynieść efekt w postaci zwiększonej syntezy androgenów tylko w przypadku wcześniejszego niedoboru tego pierwiastka. W odniesieniu do magnezu istnieją przesłanki na podstawie badań interwencyjnych, które wskazują na pozytywny wpływ jego suplementacji (jako preparat pojedynczy lub w połączeniu z cynkiem) na syntezę omawianego hormonu. Z uwagi na występowanie receptorów witaminy D (VDR) oraz enzymów metabolizujących tę witaminę w komórkach Leydiga, wpływ podaży cholekalcyferolu na syntezę testosteronu wydaje się prawdopodobny, jednak dostępne badania nie wyjaśniają siły tego wpływu.

18

Extraction of vanadium and potassium compounds from the spent vanadium catalyst from the metallurgical plant

51%

Mazurek K.

Polish Journal of Chemical Technology

|

2012

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vol. 14

|

issue 2

49-53

EN

A spent vanadium catalyst, from the plant of metallurgical type, was leached in a sulfuric acid solution to recover vanadium and potassium compounds. The effect of time, temperature, concentration of acid, catalyst particle size and phase ratio was studied. Additionally the concentration of iron, copper, zinc, arsenic and lead compounds was determined. The flow sheet for the proposed process of spent vanadium catalyst leaching is presented.

19

Wolne rodniki, selen a padaczka u dzieci

51%

Wendorff J., Sokołowska D.

Aktualności Neurologiczne

|

2010

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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.

20

Influence of Preparation Method of Spirogyra Sp. Algae on their Sorption Capacity

51%

Rajfur M.

Ecological Chemistry and Engineering S

|

2013

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vol. 20

|

issue 3

475-488

EN

The influence of the preparation method of samples on the zinc ions sorption parameters in Spirogyra sp. algae was analysed. The Zn2+ sorption process from the salt solutions of this analyte was carried out in static conditions. The carried out analyses results show that the method of algae samples preparation for analyses (thermal drying, freeze drying, samples conditioning in demineralised water) and storage period influence their sorption capacity. On the basis of the carried out research of the metal sorption kinetics in live and prepared algae samples, it was found that the equilibrium is achieved after approximately 30 min. In the experiment conditions, 56% of metals are sorbed in live algae during the first 15 min. Approximately 17 and 65% of zinc ions present in the dilution accumulated in thermally dried and freeze dried algae samples respectively after 30 min of the process. It was confirmed that conditioning of the algae samples in demineralised water, prior to the sorption process, increases its efficiency. In order to define sorption capacity of freeze dried Spirogyra sp. algae, the Langmuir isotherm model was applied. It was found out that algae absorb heavy metals in proportion to their content in a solution, in which they were immersed. The sorption capacity of freeze dried Spirogyra sp. algae and zinc, defined with the use of the Langmuir isotherm, shows considerable imprecise result. Evident influence of hydrogen cations on zinc concentrations in algae and in the solution in the state of equilibrium was found out.

PL

Zbadano wpływ sposobu preparowania próbek na parametry sorpcji jonów cynku na glonach Spirogyra sp. Proces sorpcji Zn2+ z roztworów soli tego analitu prowadzono w warunkach statycznych. Wyniki z przeprowadzonych badań wskazują, że sposób przygotowania próbek glonów do analiz (suszenie termiczne, liofilizacja, kondycjonowanie próbek w wodzie zdemineralizowanej) oraz czas przechowywania ma wpływ na ich pojemność sorpcyjną. Na podstawie przeprowadzonych badań kinetyki sorpcji tego metalu na żywych i preparowanych próbkach glonów stwierdzono, że stan równowagi zostaje osiągnięty po około 30 minutach. W warunkach prowadzenia eksperymentu 56% metali sorbowanych jest na glonach żywych w pierwszych 15 minutach. W próbkach glonów suszonych termicznie i liofilizowanych po 30 minutach trwania procesu zakumulowało się odpowiednio około 17 i 65% jonów cynku obecnych w roztworze. Stwierdzono, że kondycjonowanie próbek glonów przed procesem sorpcji w wodzie zdemineralizowanej podnosi jego wydajność. W celu wyznaczenia pojemności sorpcyjnej liofilizowanych glonów Spirogyra sp. zastosowano model izotermy Langmuira. Stwierdzono, że glony sorbują metale ciężkie proporcjonalnie do ich zawartości w roztworze, w którym zostały zanurzone. Wyznaczona z izotermy Langmuira pojemność sorpcyjna liofilizowanych glonów Spirogyra sp. względem cynku jest obarczona dużą niepewnością pomiarów. Stwierdzono wyraźny wpływ kationów wodorowych na stężenia miedzi w glonach i w roztworze w stanie równowagi.

Refine search results

The Biomedical Role of Zinc in the Functioning of the Human Organism

Deposition of Zn-containing films using atmospheric pressure plasma jet

Kinetics of Zinc Evaporation in Inert and Reducing Gases

Zinc-binding proteins from boar seminal plasma - isolation, biochemical characteristics and influence on spermatozoa stored at 4°C

RELEASE OF BIOACTIVE SUBSTANCES FROM FORMULATIONS CONTAINING ARTHROSPIRA PLATENSIS (SPIRULINA PLATENSIS)

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

A comparison of sequential extraction procedures for fractionation of arsenic, cadmium, lead, and zinc in soil

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

Synthesis and entomotoxicity assay of zinc and silica nanoparticles against Sitophilus granarius (Coleoptera: Curculionidae)

Impact of composts with the participation of municipal sewage sludge on the content of the total forms of copper, manganese and zinc in soil

Effect of plant hormones on the cambial activity of Cerasus vulgaris Miller under stress conditions with Zn

Zinc accumulation in lichens due to industrial emissions around Vorkuta, northeast European Russia

Effect of long-term fertilization of the permanent dry meadow on the zinc content in soil and meadow sward

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

Mitochondrial respiratory chain inhibitors modulate the metal-induced inner mitochondrial membrane permeabilization

DURABILITY OF CHITOSAN/CELLULOSE HYDROGEL BEADS REGENERATED FROM AN IONIC LIQUID IN ACIDIC AND BASIC MEDIA AND THEIR METAL ADSORPTIVE CHARACTERISTICS

Wpływ cynku, magnezu i witaminy D na produkcję testosteronu u mężczyzn

Extraction of vanadium and potassium compounds from the spent vanadium catalyst from the metallurgical plant

Wolne rodniki, selen a padaczka u dzieci

Influence of Preparation Method of Spirogyra Sp. Algae on their Sorption Capacity