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1

Lecithin - pharmaceutical applications expanded beyond liposomes

100%
Sznitowska M.
Cellular and Molecular Biology Letters
|
2005
|
tom 10
|
nr Suppl.
2

Antioxidant influence on thermodynamical properties of lecithin monolayers

88%
Hladyszowski J., Trela Z., Przestalski S., Witek S.
Biophysics of Membrane Transport
|
1994
|
tom 12
|
nr 2
3

The contribution affects of the some ingredients in making Hosmerim

75%
Savas E.
Polish Journal of Food and Nutrition Sciences
|
2011
|
tom 61
|
nr Suppl.1
4

Studies of mixed monalayers of lecithin and organometallic compounds

75%
Trela Z., Przestalski S., Hladyszowski J.
Polish Journal of Environmental Studies
|
1997
|
tom 06
|
nr 4
Compression isotherms of mixed monomolecular layers at water-air interface, formed of lecithin (DPPC) and an organometallic compound (Me3PbCl, Me3SnCl, Et3PbCl, Et3SnCl) at various molar fractions (x = 0.0,0.2,0.4, 0.6, 0.8, 1.0) were studied. It was found that compression isotherms of the pure organometallic compounds (x = 1.0), in the range of mean molecular areas of 1.0 nm2 and ca. 0.15 nm2, did not show any practical increase in surface pressure. The isobaric relationship between mean molecular areas and molar fraction of an organometallic modifier are linear for most of the pressures chosen, which follows from analysis of the experimental isotherms obtained and demonstrates the ideal behaviour of the system under study. All the compounds studied form nearly ideally-behaving systems with lecithin. Presumably, the effects observed may be the result of molecular aggregation on the water phase surface, which in a mixed monolayer may lead to separation of the phases: organometallic compound - lecithin.
5

Electric interactions at the lipid membrane surface

63%
Podolak M., Man D.
Cellular and Molecular Biology Letters
|
2002
|
tom 07
|
nr 4
This work presents the results of an experimental study and of computer simulations concerning electric interactions in the surface layer of egg yolk lecithin (EYL) liposome membranes. The surface layer is formed by EYL polar heads, which possess features of electric dipoles, and positive charged polar heads belonging to admixtures of quaternary ammonium salts (AS). The results of the experimental study are in good agreement with the ones of the computer simulations. It was found that fluidity of the membranes, at a given concentration of AS, obtains the extremal (minimal) value. Similarly, the binding energy of the dipoles-positive charges system behaves like that in computer simulations. Moreover, the locations of the fluidity extremum and those of the binding energy depend on the charge of the AS polar heads as well as on the degree of electric interactions screening by the environment. At a certain optimal value of the screening coefficient, the energy of the system is the lowest (the most negative) and together with the rise in AS charge, the minimum of the energy moves towards its higher concentrations.
6

Regulation effect of amphiphilic anionic compounds on calcium ion desorption process from lecithin liposome membranes modified by tripropyltin and tripropyllead compounds

63%
Kral T. E., Kuczera J., Przestalski S.
Cellular and Molecular Biology Letters
|
1999
|
tom 04
|
nr 2
7

Capacitance and resistance of the bilayer lipid membrane formed of phosphatidylcholine and cholesterol

63%
Naumowicz M., Petelska A. D., Figaszewski Z. A.
Cellular and Molecular Biology Letters
|
2003
|
tom 08
|
nr 1
Capacity and electric resistance of lipid membranes composed of lecithin and cholesterol were determined. The components were chosen for the study because they were present in biological membranes. Capacitance of the lecithin and cholesterol membranes amounts to 0.38 and 0.61 μF/cm2, and resistance to 1.44xl04 and 2.12x 106 Ω cm2, respectively. A 1:1 complex appears as a result of lecithin-cholesterol membrane formation. Parameters of the membrane formed of the lecithin-cholesterol complex were determined: surface concentration (Γ3), capacitance (C3), and conductance (R 31), as well as the stability constant (K) of the complex. The mean values of those magnitudes are as follows: 4.265xl0-6 mol/m2, 0.54 μF/cm2, 1.381xl0-6 Ω-1 cm-2 and 3.748x107, respectively.
8

Impact of different levels of rapeseed lecithin in diet on effects of rearing of carp [Cyprinus carpio L.] in cooling water

63%
Sadowski J., Filipiak J., Trzebiatowski R.
Zeszyty Naukowe. Akademia Rolnicza w Szczecinie. Rybactwo Morskie i Technologia Żywności
|
1997
|
tom 23
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Effect of monoglyceride and lecithin addition on cooking quality of precooked pasta

63%
Wojtowicz A.
Polish Journal of Food and Nutrition Sciences
|
2007
|
tom 57
|
nr 3[A]
In the paper the results of chosen cooking quality measurements of precooked pasta with emulsifiers addition are presented. The influence of glycerol monostearate and lecithin addition in the amount of 0.25%, 0.5%, 0.75% and 1% of flour weight were tested. The expansion ratio, water absorption, cooking losses, minimal preparation time and sensory assessment of dry and hydrated samples were performed for extrusion-cooked pasta products. The addition of glycerol monostearate (stronger) and lecithin (less) lowered radial expansion ratio and water absorption of the examined pasta as compared to the pasta without any additive. Limited cooking losses were observed for precooked pasta with glycerol monostearate addition. Good quality was confirmed for pasta with the addition of 0.25% glycerol monostearate.
10

The effect of the presence of crown ether on ion transport across the lipid bilayer

63%
Naumowicz M., Petelska A. D., Figaszewski Z. A.
Cellular and Molecular Biology Letters
|
2003
|
tom 08
|
nr 2
We studied the electric properties of phosphatidylcholine bilayers modified with crown ether (dibenzo[18] crown-6). The studies were carried out for various crown ether concentrations in forming solutions and various potassium ion concentrations in electrolyte solutions. The presence of crown ether in the membrane influences the membrane's impedance; there is a reduction in its resistivity, a decrease in its resistance of phase transfer and an increase in its capacity of phase transfer with an increase in crown ether concentration in the bilayer and in K+ ion concentration in the electrolyte solution.
11
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Spectral properties of propyl gallate in organic solvents and in heterogeneous environment

63%
Dwiecki K., Gornas P., Nogala-Kalucka M., Polewski K.
Acta Agrophysica
|
2006
|
tom 07
|
nr 1[132]
12

The origin and metabolism of a nascent pre-beta high density lipoprotein involved in cellular cholesterol efflux

51%
Wroblewska M.
Acta Biochimica Polonica
|
2011
|
tom 58
|
nr 3
 The pre-β HDL fraction constitutes a heterogeneous population of discoid nascent HDL particles. They transport from 1 to 25 % of total human plasma apo A-I. Pre-β HDL particles are generated de novo by interaction between ABCA1 transporters and monomolecular lipid-free apo A-I. Most probably, the binding of apo A-I to ABCA1 initiates the generation of the phospholipid-apo A-I complex which induces free cholesterol efflux. The lipid-poor nascent pre-β HDL particle associates with more lipids through exposure to the ABCG1 transporter and apo M. The maturation of pre-β HDL into the spherical α-HDL containing apo A-I is mediated by LCAT, which esterifies free cholesterol and thereby forms a hydrophobic core of the lipoprotein particle. LCAT is also a key factor in promoting the formation of the HDL particle containing apo A-I and apo A-II by fusion of the spherical α-HDL containing apo A-I and the nascent discoid HDL containing apo A-II. The plasma remodelling of mature HDL particles by lipid transfer proteins and hepatic lipase causes the dissociation of lipid-free/lipid-poor apo A-I, which can either interact with ABCA1 transporters and be incorporated back into pre-existing HDL particles, or eventually be catabolized in the kidney. The formation of pre-β HDL and the cycling of apo A-I between the pre-β and α-HDL particles are thought to be crucial mechanisms of reverse cholesterol transport and the expression of ABCA1 in macrophages may play a main role in the protection against atherosclerosis.
13

Antioxidant activity of model neuromelanins in the process of lipid peroxidation

51%
Stepien K., Wilczok T.
Current Topics in Biophysics
|
1994
|
tom 18
|
nr 2
14

Effects of canola and soya lecithins compared with canola oil and seed on performance, carcass quality and body fat composition of growing bulls

51%
Wettstein H. R., Kreuzer M., Sutter F., Scheeder M. R. L.
Journal of Animal and Feed Sciences
|
2000
|
tom 09
|
nr 4
15

Zywnosc o okreslonych funkcjach prozdrowotnych - zywnosc funkcjonalna na tle doswiadczen japonskich

26%
Antosiewicz I.
Żywność, Żywienie a Zdrowie
|
1997
|
tom 06
|
nr 4
346-352
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