Autor: Janas, Tadeusz - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ćwiczenia [OC w Kaliskiem] "Prosna 95"
Autorzy:: Janas, Tadeusz.
Powiązania:: Polska Zbrojna 1995, nr 240, s. 7
Data publikacji:: 1995
Tematy:: Obrona cywilna ćwiczenia
Opis:: Fot.
Dostawca treści:: Bibliografia CBW

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Skocz do pozycji: 2.

Tytuł:: The effect of undecaprenol on bilayer lipid membranes
Autorzy:: Janas, Teresa
Chojnacki, Tadeusz
Świeżewska, Ewa
Janas, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/1045331.pdf
Data publikacji:: 1994
Wydawca:: Polskie Towarzystwo Biochemiczne
Źródło:: Acta Biochimica Polonica; 1994, 41, 3; 351-358
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The effect of hexadecaprenol on molecular organisation and transport properties of model membranes.
Autorzy:: Janas, Teresa
Nowotarski, Krzysztof
Gruszecki, Wiesław
Janas, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/1044307.pdf
Data publikacji:: 2000
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: voltammetric studies.
bilayer lipid membranes
Langmuir film studies
long-chain polyprenol
lipid monolayer
Opis:: The Langmuir monolayer technique and voltammetric analysis were used to investigate the properties of model lipid membranes prepared from dioleoylphosphatidylcholine (DOPC), hexadecaprenol (C80), and their mixtures. Surface pressure- molecular area isotherms, current-voltage characteristics, and membrane conductance-temperature were measured. Molecular area isobars, specific molecular areas, excess free energy of mixing, collapse pressure and collapse area were determined for lipid monolayers. Membrane conductance, activation energy of ion migration across the membrane, and membrane permeability coefficient for chloride ions were determined for lipid bilayers. Hexadecaprenol decreases the activation energy and increases membrane conductance and membrane permeability coefficient. The results of monolayer and bilayer investigations show that some electrical, transport and packing properties of lipid membranes change under the influence of hexadecaprenol. The results indicate that hexadecaprenol modulates the molecular organisation of the membrane and that the specific molecular area of polyprenol molecules depends on the relative concentration of polyprenols in membranes. We suggest that hexadecaprenol modifies lipid membranes by the formation of fluid microdomains. The results also indicate that electrical transmembrane potential can accelerate the formation of pores in lipid bilayers modified by long chain polyprenols.
Źródło:: Acta Biochimica Polonica; 2000, 47, 3; 661-673
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Translocation of polysialic acid across model membranes: Kinetic analysis and dynamic.
Autorzy:: Janas, Teresa
Krajiński, Henryk
Timoszyk, Anna
Janas, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/1044181.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: polysialic acid
1H-NMR
electrical equivalent circuit
polycation flux
polyanion flux
lipid bilayers
membrane transport
Opis:: Transmembrane translocation of polyion homopolymers takes place in the case of polyanionic polysialic acid (polySia), polyanionic polynucleotides and polycationic polypeptides. The purpose of this work was to determine the role of membrane electrical parameters on the kinetics of polyion translocation, the influence of polysialic acid on ion adsorption on positively charged membrane surface and the dynamics of the phospholipid hydrocarbon chains and choline group by using 1H-NMR. The analysis of polyion translocation was performed by using the electrical equivalent circuit of the membrane for the initial membrane potential equal to zero. The changes in polysialic acid flux was up to 75% after 1 ms in comparison with the zero-time flux. Both a decrease of membrane conductance and an increase of polyion chain length resulted in the diminution of this effect. An increase of praseodymium ions adsorption to positively charged liposomes and an increase of the rate of segmental movement of the -CH2 and -CH3 groups, and the choline headgrup of lipid molecules, was observed in the presence of polySia. The results show that the direction of the vectorial polyion translocation depends both on the membrane electrical properties and the degree of polymerization of the polymer, and that polysialic acid can modulate the degree of ion adsorption and the dynamics of membrane lipids.
Źródło:: Acta Biochimica Polonica; 2001, 48, 1; 163-173
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Susceptometer in soil magnetic susceptibility studies
Autorzy:: Janas, Sławomir
Magiera, Tadeusz
Szumiata, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/2052100.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: magnetic susceptibility
soils
analysis
mass measurement
Opis:: This work presents a method for measuring the magnetic susceptibility of soil samples based on interactions of magnetic particles contained in a tested sample with a weighed permanent magnet placed in the balance mechanical design. The MYA 2.4Y microbalance manufactured by Radwag Wagi Elektroniczne, Poland, was used to perform mass measurements. The weighing system was adjusted for mass indication using a certified mass standard, and for magnetic susceptibility indication using a certified magnetic susceptibility standard. The volume of each analysed soil sample was 3.93 cm3 and was similar to the volume and the size of the magnetic susceptibility standard. The research was carried out for 10 soil samples with a magnetic susceptibility range varying from 20 to 1600x10-8 m3 kg-1. The soil samples contained technogenic magnetic particles and particles of natural magnetite of geogenic origin. The study was performed for a field of 2 mT.
Źródło:: Metrology and Measurement Systems; 2022, 29, 1; 127-142
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki