Wyniki wyszukiwania

1

The mechanistic approach to membrane mass transport processes

100%

Kargol M.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr Suppl.

2

Release of Pr3plus ions from liposomes affected by single and double-chain ammonium chlorides

100%

Gabrielska J., Pawlowicz P., Sarapuk J.

Polish Journal of Environmental Studies

|

1992

|

tom 01

|

nr 2

By using the lH—NMR method and paramagnetic ions Pr3+, the incorporation into the liposome membrane of a series of biologically active single-chain (TGE-n) and double-chain (DGE-n) quaternary ammonium salts was studied. Corresponding compounds of both groups differed in their alkyl chain-length (n = 8,10,12,14 and 16). Minimal concentration CA of compounds TGE-n and DGE-n which caused total release of Pr3+ ions from the external layer of liposome membrane and the ratio of CA to the 4.5 mM extravesicular concentration of Pr3+ (CPr) used in experiments was determined. Based on the results obtained, one can conclude that the effectiveness of Pr3+ release from liposome membrane is (with n = 12,14 and 16) twice as high for double-chain compounds as for analogous single-chain compounds, and about 2.5 and 5 times higher for DGE-10 and DGE-8 than for TGE-10 and TGE-8, respectively.

3

Impact of polylysine dendrimers on biological membranes

100%

Jokiel M., Klajnert B., Bryszewska M.

Cellular and Molecular Biology Letters

|

2005

|

tom 10

|

nr Suppl.

4

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Identification and characteristics of aquaporin-coding sequences in Arion vulgaris Moquin-Tandon, 1855 and Planorbarius corneus (Linnaeus, 1758)

88%

Pienkowska J. R., Kosicka E., Lesicki A.

Folia Malacologica

|

2016

|

tom 24

|

nr 1

5

The antioxidant activity of new ammonium salts

88%

Gabrielska J., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1994

|

tom 12

|

nr 2

6

Elastic properties of closed layered membranes and equilibrium shapes of phospholipid vesicles

88%

Svetina S., Zeks B.

Biophysics of Membrane Transport

|

1992

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tom 11

|

nr 2

7

On the transport of some ecotoxicants through liposomal membranes

88%

Saratovskih E. A., Kondratieva T. A., Psikha B. L.

Cellular and Molecular Biology Letters

|

1999

|

tom 04

|

nr 2

8

Peptide-lipid interactions in a bilayer: molecular modelling studies

88%

Pasenkiewicz-Gierula M., Rog T., Murzyn K.

Cellular and Molecular Biology Letters

|

2005

|

tom 10

|

nr Suppl.

9

Is the fluid-mosaic model of biological membranes fully relevant? Studies on lipid organization in model membranes

88%

Wisniewska A., Draus J., Subczynski W. K.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

10

Resorcinolic lipids - disturb or stabilize biological membranes? Molecular dynamics simulations

88%

Siwko M. E., Marrink S. J., Kozubek A., Mark A. E.

Cellular and Molecular Biology Letters

|

2005

|

tom 10

|

nr Suppl.

11

MPP1-based mechanism of resting state raft organization in the plasma membrane. Is it a general or specialized mechanism in erythroid cells?

75%

Trybus M., Niemiec L., Biernatowska A., Hryniewicz-Jankowska A., Sikorski A. F.

Folia Histochemica et Cytobiologica

|

2019

|

tom 57

|

nr 2

12

Influence of silver and copper nanoparticles on Staphylococcus aureus biofilm formation

75%

Widynska E., Zajac A., Jaworski S., Strojny B.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

|

2018

|

tom 57[2]

13

Phospholipid monolayer and liposome application in the determination of the photophysical characteristics of MC 540

75%

Sikurova L.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr 2

14

The dependence of fluorescein-PE fluorescence intensity on lipid bilayer state. Evaluating the interaction between the probe and lipid molecules

75%

Kubica K., Langner M., Gabrielska J.

Cellular and Molecular Biology Letters

|

2003

|

tom 08

|

nr 4

The degree of dependence of a lipid bilayer’s surface properties on its conformational state is still an unresolved question. Surface properties are functions of molecular organization in the complex interfacial region. In the past, they were frequently measured using fluorescence spectroscopy. Since a fluorescent probe provides information on its local environment, there is a need to estimate the effect caused by the probe itself. In this paper, we address this question by calculating how lipid head-group orientation effects the fluorescence intensity of Fluorescein-PE (a probe that is sensitive to surface potential). In the theoretical model assumed the lipid bilayer state and the interactions between the charged fluorescent probe and the surrounding lipid molecules was evaluated. The results of this theoretical analysis were compared with experimentally obtained data. A lipid bilayer formed from DPPC was chosen as the experimental system, since it exhibits all the major conformational states within a narrow temperature range of 30°C - 45°C. Fluorescein-PE fluorescence intensity depends on local pH, which in turn is sensitive to local electrostatic potential in the probe’s vicinity. This local electrostatic potential is generated by lipid head-group dipole orientation. We have shown that the effect of the probe on lipid bilayer properties is limited when the lipid bilayer is in the gel phase, whereas it is more pronounced when the membrane is liquid-crystalline. This implies that Fluorescein-PE is a good reporter of local electrostatic fields when the lipid bilayer is in the gel phase, and is a poor reporter when the membrane is in the liquid-crystalline state.

15

Cholesterol-induced variations in fluctuations of the pores in bilayer lipid membrane

75%

Koronkiewicz S., Bryl K.

Cellular and Molecular Biology Letters

|

1999

|

tom 04

|

nr 4

The constant-current chronopotentiometric measurements of egg yolk phosphatidylcholine bilayer membrane without and with cholesterol are presented. It was demonstrated that the constant-intensity current flow through the bilayer membranes without and with cholesterol generated the oscillating pores in their structures. The presence of cholesterol in the bilayer membrane increased the value of critical potential at which pores could be formed. The shift in the distribution of calculated pore radii towards smaller values was observed in the bilayer containing cholesterol. It was postulated that greater stability of bilayer with cholesterol resulted from increased critical pore radius (at which the bilayer would rupture). The implications of the membrane cholesterol for the application of constant-current method as a biotechnological tool for incorporating molecules of different size are discussed.

16

Cereal grain resorcinolic lipids inhibit H2O2-induced peroxidation of biological membranes

75%

Kozubek A., Nienartowicz B.

Acta Biochimica Polonica

|

1995

|

tom 42

|

nr 3

Cereal grain resorcinolic lipids (S-n-alk(en)ylresorcinols) at micromolar concentrations are able to protect the erythrocyte membrane against hydrogen peroxide-induced lipid oxidation. The antioxidative effect is dependent upon chain length of alkylresorcinol molecules. The C15:0 homolog (IC50 of 10 uM) exhibited strongest activity whereas for long chain homologs (C19: 0 and C23 : 0) IC50 values were higher, 32.5 and 59 uM, respectively. The protective effect of alkylresorcinolic antioxidants was also dependent on their incorporation into the membrane, that is governed by their water-membrane partition coefficient The results obtained show that alkylresorcinols should be recognized as hydrophobic, membrane-localised antioxidants.

17

Orientation and spectral properties of two stilbazolium merocyanine dyes in stretched and unstretched polyvinyl alcohol films

75%

Dudkowiak A., Frackowiak D., Teslak E., Gryczynski Z., Gryczynski I.

Acta Biochimica Polonica

|

2007

|

tom 54

|

nr 3

Spectral properties (anisotropy coefficients calculated for absorption, emission and fluorescence decay time) of two stilbazolium merocyanine dyes have been determined to evaluate the applicability of these dyes as sensitizers in photodynamic therapy. The dyes were embedded in an anisotropic polymer matrix. Analysis of the emission decay components measured in polarized light provides information on the interactions of the dye molecules with the polymer matrix being a model of an anisotropic biological system. Different values of the emission anisotropies obtained from various polarized components of fluorescence decays have shown that the orientations of the dye molecules influence their interactions with the polymer. This means that differently oriented dye molecules located in biological systems should exhibit different interactions with membranes. The chain length and type of side groups attached as well as the salt form of the dye molecule were shown to influence the dye-polymer interactions and should be taken into account before the application of merocyanine dyes in medicine. These dyes seem to be promising optical sensors with spectral properties, including the calculated anisotropy coefficients, sensitive to the molecular environment, useful to study orientation and interaction with neighbouring molecules in biological membranes.

18

Incorporation of stilbazolium merocyanines into biological membranes

75%

Niedbalska M., Gruda I.

Current Topics in Biophysics

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1992

|

tom 16

|

nr 1

19

Interaction between membranes and a new class of membrane active compounds with antioxidant group. The hydrophylic properties

75%

Sarapuk J., Kleszczynska H., Hladyszowski J., Gabrielska J., Kral T. E., Trela Z., Kuczera J., Przestalski S., Witek S.

Biophysics of Membrane Transport

|

1994

|

tom 12

|

nr 2

20

Magnetic field effects on biological membranes and tissues

75%

Hong F. T.

Biophysics of Membrane Transport

|

1994

|

tom 12

|

nr 1

Ograniczanie wyników

The mechanistic approach to membrane mass transport processes

Release of Pr3plus ions from liposomes affected by single and double-chain ammonium chlorides

Impact of polylysine dendrimers on biological membranes

Identification and characteristics of aquaporin-coding sequences in Arion vulgaris Moquin-Tandon, 1855 and Planorbarius corneus (Linnaeus, 1758)

The antioxidant activity of new ammonium salts

Elastic properties of closed layered membranes and equilibrium shapes of phospholipid vesicles

On the transport of some ecotoxicants through liposomal membranes

Peptide-lipid interactions in a bilayer: molecular modelling studies

Is the fluid-mosaic model of biological membranes fully relevant? Studies on lipid organization in model membranes

Resorcinolic lipids - disturb or stabilize biological membranes? Molecular dynamics simulations

MPP1-based mechanism of resting state raft organization in the plasma membrane. Is it a general or specialized mechanism in erythroid cells?

Influence of silver and copper nanoparticles on Staphylococcus aureus biofilm formation