Wyniki wyszukiwania

1

Kokcydioza - problem niemal każdej hodowli trzody chlewnej w Polsce

100%

Malecka A.

Zachodniopomorski Magazyn Rolniczy

|

2010-2011

|

nr 57

2

Altruistyczny wymiar konsumpcjikolaboratywnej - czy naprawdę istnieje? Na przykładzie wspólnego użytkowania sprzętu medycznego

100%

Malecka A.

Marketing i Rynek

|

2019

|

tom 26

|

nr 05

3

Skłonność do uczestnictwa w konsumpcji kolaboratywnej a kapitał społeczny

63%

Malecka A., Mitrega M.

Handel Wewnętrzny

|

2017

|

tom 63

|

nr 5

4

Test of Busse,s method of studying directional preferences of migrating small Passeriformes

63%

Nowakowski J. K., Malecka A.

Acta Ornithologica

|

1999

|

tom 34

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nr 1

37-44

The test was carried out in the Central Poland, during the autumn migration in years 1997 and 1998, and the object was the Robin Erithacus rubecula. The aim of the study was the verification of the new field method for studying directional preferences in small Passerine migrants, proposed by Busse (1995). In total, 843 Robins were tested in "Busse's cage". Directions preferred by the tested birds were distributed in conformance with wintering areas and migration routes of the species known from literature. Robins with dark legs and grey plumage at flanks pointed at the directions according to the axis Scandinavia — the Balkans, which is in consistence with the literature data. Robins tested at daytime show stronger directionality than those tested at night. Birds tested with the sun visible expressed stronger directionality than those tested under overcast. The Robins tested at day more often pointed at the return direction — to the north and to the north-east. The activity of birds in the experimental cage increased at daytime with the lack of sun visible, and with overcast, and was higher in birds with smaller fat deposit, thus it reflected mainly the normal vital activity not associated with the migration.

5

Ocena kondycji finansowej przedsiębiorstwa PGE

63%

Karmowska G., Malecka A.

Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego. Ekonomika i Organizacja Gospodarki Żywnościowej

|

2009

|

nr 76

6

Reaktywne formy tlenu w komorkach roslinnych i enzymatyczne systemy obronne

63%

Malecka A., Tomaszewska B.

Postępy Biologii Komórki

|

2005

|

tom 32

|

nr 2

311-325

7

Alkoholizacja torbieli wątrobowej u kota - opis przypadku

51%

Jankowski M., Krygowska-Jankowska A., Malecka A.

Magazyn Weterynaryjny

|

2014

|

tom 23

|

nr 10

8

Competitive mechanisms of metals (Cu, Zn, Cd, Pb) during their intake by pea plants

51%

Malecka A., Piechalak A., Kutrowska A., Tomaszewska B.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2014

|

tom 56

|

nr 2

9

Under pressure: observations of Indian mustard's daily dealings with trace metal stress

51%

Kutrowska A., Malecka A., Piechalak A., Tomaszewska B.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2014

|

tom 56

|

nr 2

10

Reactive oxygen species production and antioxidative defense system in pea root tissues treated with lead ions: the whole roots level

51%

Malecka A., Piechalak A., Tomaszewska B.

Acta Physiologiae Plantarum

|

2009

|

tom 31

|

nr 5

The lead absorbed by the roots induce oxidative stress conditions through the Reactive oxygen species (ROS) production for the pea plants cultivated hydroponically for 96 h on a Hoagland medium with the addition of 0.1 and 0.5 mM of Pb(NO₃)₂. The alterations in O₂⁻˙ and H₂O₂ concentrations were monitored spectrophotometrically which show a rapid increase in O₂⁻˙ production during the initial 2 h, and in case of H₂O₂, during the eighth hour of cultivation. The level of ROS remained higher at all the time points for the roots of the plants cultivated with Pb²⁺ and it was proportional to metal concentration. The production of O₂⁻˙ and H₂O₂ was visualized by means of fluorescence microscope technique. They are produced in nonenzymatic membrane lipid peroxidation and its final product is Malondialdehyde, the level of which increased together with the level of H₂O₂. As stress intensity raised (duration of treatment and Pb²⁺ concentration), so did the activities of superoxide dismutases, catalase and ascorbate peroxidase antioxidative enzymes and of low-molecular antioxidants, particularly glutathione (GSH), homoglutathione (h-GSH) and cysteine substrate toward their synthesis. The root cells redox state (GSH/GSSG) dropped proportionally to lead stress intensity.

11

Antioxidative system in roots of pea plants tratend with lead ions

51%

Malecka A., Piechalak A., Tomaszewska B.

Acta Biochimica Polonica

|

2003

|

tom 50

|

nr Supplement 1

12

Accumulation of lead in root cells of Pisum sativum

51%

Malecka A., Piechalak A., Morkunas I., Tomaszewska B.

Acta Physiologiae Plantarum

|

2008

|

tom 30

|

nr 5

The ever-increasing environmental pollution necessitates organisms to develop specific defense systems in order to survive and function effectively. Lead is taken up by plants mainly through roots and over 96% are accumulated there.Pea plants were cultivated hydroponically for 4 days with 0.1, 0.5 and 1 mM Pb(NO3)2. Uptake of lead ions from nutrient solution and accumulation in root stems and leaves during 96-h cultivation was estimated. The root tip cells were observed with transmission electron microscope to analyse their ultrastructure and lead localization. Pb was accumulated in the cell wall, cell membrane, vacuoles, mitochondria and peroxisomes. The fractions of mitochondria and peroxisomes were isolated from pea roots purified by means Percoll gradient, and were observed by means of electron microscope with the attachment for X-ray microanalysis. Visible deposits containing Pb were observed in both cell organelles.

13

Badanie ultrasonograficzne węzłów chłonnych u psów i kotów

51%

Jankowski M., Krygowska-Jankowska A., Malecka A.

Weterynaria w Praktyce

|

2014

|

tom 11

|

nr 03

14

Localization of hydrogen peroxide and superoxide anion in Pisum sativum roots in oxidative stress conditions

51%

Malecka A., Piechalak A., Tomaszewska B.

Acta Biochimica Polonica

|

2006

|

tom 53

|

nr Supplement 1

15

Ultrasonografia jąder psa w praktyce klinicznej

51%

Jankowski M., Krygowska-Jankowska A., Malecka A.

Weterynaria w Praktyce

|

2012

|

tom 09

|

nr 10

16

Antioxidative defense to lead stress in subcellular compartments of pea root cells

51%

Malecka A., Jarmuszkiewicz W., Tomaszewska B.

Acta Biochimica Polonica

|

2001

|

tom 48

|

nr 3

Lead, similar to other heavy metals and abiotic factors, causes many unfavorable changes at the subcellular and molecular levels in plant cells. An increased level of superoxide anion in Pisum sativum root cells treated with 1 mM Pb(NO3)2 evidenced oxidative stress conditions. We found increased activities of enzymatic components of the antioxidative system (catalase and superoxide dismutase) in the cytosol, mito- chondrial and peroxisomal fractions isolated from root cells of Pisum sativum grown in modified Hoagland medium in the presence of lead ions (0.5 or 1 mM). Two isoenzyme forms of superoxide dismutase (Cu,Zn-SOD and Mn-SOD) found in different subcellular compartments of pea roots were more active in Pb-treated plants than in control. Increased amount of alternative oxidase accompanied by an increased activity of this enzyme was found in mitochondria isolated from lead-treated roots. These results show that plants storing excessive amounts of lead in roots defend themselves against the harmful oxidative stress caused by this heavy metal.

17

Antioxidative system in roots of plants stressed by lead ions

51%

Malecka A., Piechalak A., Tomaszewska B.

Biological Letters

|

2005

|

tom 42

|

nr 2 Spec.Vol.

18

Reactive oxygen species production and antioxidative defense system in pea root tissues treated with lead ions: mitochondrial and peroxisomal level

45%

Malecka A., Derba-Maceluch M., Kaczorowska K., Piechalak A., Tomaszewska B.

Acta Physiologiae Plantarum

|

2009

|

tom 31

|

nr 5

Reactive oxygen species (ROS) production and enzymatic antioxidative system [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APOX), alternative oxidase (AOX)] in nonphotosynthesizing pea plant cells were investigated. From the roots of pea plants cultivated hydroponically on a Hoagland medium with the addition of 0.1 and 0.5 mM of Pb(NO₃)₂, the three following fractions were isolated by means of a Percoll gradient: cytosol, peroxisomal, and mitochondrial. Lead stress caused H₂O₂ production in these organelles. The mitochondria from pea cell roots were the main site of H₂O₂ production. Intensive stress caused by 0.5 mM of Pb(NO₃)₂ brought about a decrease of H₂O₂ concentration in mitochondria and peroxisomes after 3 days of the exposition, which was due to an increase of CAT activity. The isoenzymatic profile of antioxidative enzymes indicates mitochondrial and peroxisomal localization of MnSOD and cytoplasmic localization of CuSOD. APOX activity was estimated for all three fractions: cytosol, mitochondria, and peroxisomes. Simultaneously, we observed an increased expression of AOX genes on the basis of the amount of mRNA transcript and confirmed it immunologically on the level of synthesized AOX protein (36 kDa). This has been the first evidence of AOX genes expression of which is induced by the treatment of plants with lead ions and it increases along with the concentration of metal.

19

Response of the pea roots defense systems to the two - element combinations of metals (Cu, Zn, Cd, Pb)

45%

Malecka A., Piechalak A., Zielinska B., Kutrowska A., Tomaszewska B.

Acta Biochimica Polonica

|

2014

|

tom 61

|

nr 1

The presence of the single metals (Cd, Pb, Cu, Zn) induces ROS (reactive oxygen species) production and causes oxidative stress in plants. While applied in two-element combinations, trace metals impact organisms in a more complex way. To assess the resultant effect we treated the pea grown hydroponically with the trace metals in variants: CuPb, CuCd, CuZn, PbCd, ZnPb, ZnCd in concentrations of 25 µM for each metal ion. Abiotic stress inhibited root elongation growth, decreased biomass production, induced changes in root colour and morphology. It changed rate of ROS production, malondialdehyde content, increased activity and altered gene expression of defence enzymes (superoxide dysmutase, catalase, ascorbate peroxidase, glutathione reductase, γ-glutamylcysteine synthetase).

20

Biochemical changes in Pisum sativum plants after exessive supply of Pb, Cu, Cd, Zn

45%

Malecka A., Piechalak A., Hanc A., Baralkiewicz D., Tomaszewska B.

Acta Physiologiae Plantarum

|

2009

|

tom 31

|

nr 1 Suppl.

Ograniczanie wyników

Kokcydioza - problem niemal każdej hodowli trzody chlewnej w Polsce

Altruistyczny wymiar konsumpcjikolaboratywnej - czy naprawdę istnieje? Na przykładzie wspólnego użytkowania sprzętu medycznego

Skłonność do uczestnictwa w konsumpcji kolaboratywnej a kapitał społeczny

Test of Busse,s method of studying directional preferences of migrating small Passeriformes

Ocena kondycji finansowej przedsiębiorstwa PGE

Reaktywne formy tlenu w komorkach roslinnych i enzymatyczne systemy obronne

Alkoholizacja torbieli wątrobowej u kota - opis przypadku

Competitive mechanisms of metals (Cu, Zn, Cd, Pb) during their intake by pea plants

Under pressure: observations of Indian mustard's daily dealings with trace metal stress

Reactive oxygen species production and antioxidative defense system in pea root tissues treated with lead ions: the whole roots level

Antioxidative system in roots of pea plants tratend with lead ions

Accumulation of lead in root cells of Pisum sativum

Badanie ultrasonograficzne węzłów chłonnych u psów i kotów

Localization of hydrogen peroxide and superoxide anion in Pisum sativum roots in oxidative stress conditions

Ultrasonografia jąder psa w praktyce klinicznej

Antioxidative defense to lead stress in subcellular compartments of pea root cells

Antioxidative system in roots of plants stressed by lead ions

Reactive oxygen species production and antioxidative defense system in pea root tissues treated with lead ions: mitochondrial and peroxisomal level

Response of the pea roots defense systems to the two - element combinations of metals (Cu, Zn, Cd, Pb)

Biochemical changes in Pisum sativum plants after exessive supply of Pb, Cu, Cd, Zn