Wyniki wyszukiwania

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Dzis i jutro branzy piwowarskiej w Polsce. Nowe technologie w piwowarstwie

100%

Witek S.

Przemysł Fermentacyjny i Owocowo-Warzywny

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2000

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tom 44

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nr 02

17

Przedstawiono zmiany modernizacyjne dokonane w zakresie techniki i technologii w polskich browarach w latach 90. Omówiono po kolei zmiany w poszczególnych działach produkcji, począwszy od przygotowania surowców przez warzenie brzeczki, fermentacją i leżakownią, filtracją, а skończywszy па rozlewie. Intensywna modernizacja browarów została dokonana po ich sprywatyzowaniu. Dzięki zastosowaniu najnowocześniejszych rozwiązań techniczno-technologicznych browary w Polsce należą w większości do zakładów o najwyższym standardzie światowym, co pozwoliło osiągnąć bardzo dobrą jakość piwa. To umożliwia zmianę struktury spożycia alkoholi w Polsce - upodabnia ją do istniejącej w krajach Unii Europejskiej.

2

Effect of bis-ammonium quaternary salts on the red blood cells

51%

Kleszczynska H., Kilian M., Przestalski S., Witek S.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

3

Partition coefficient of single and double chains ammonium chlorides in liposome-water system. A 1H-NMR method using lanthanide probe ion Pr3plus

51%

Gabrielska J., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1990

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tom 10

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nr 2

4

Desorption of Pr3plus ions fromliposome membranes by single and double-chain ammonium chlorides

51%

Gabrielska J., Pawlowicz P., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1988

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tom 09

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nr 2

5

Development of LC-MS/MS confirmatory method for the determination of testosterone in bovine serum

51%

Wozniak B., Matraszek-Zuchowska I., Witek S., Posyniak A.

Journal of Veterinary Research

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2017

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tom 61

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nr 1

6

The effects of amphiphilic ammonium salts on the membrane potential and resistance of characeae cells

51%

Trela Z., Janas T., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1988

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tom 09

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nr 2

7

Effect of selected ammonium salts on properties of BLMs

51%

Sarapuk J., Przestalski S., Witek S.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

8

Fluidity of lecithin liposomes modified by double-chain glycine esters

51%

Podolak M., Lassmann G., Witek S., Przestalski S.

Biophysics of Membrane Transport

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1988

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tom 09

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nr 2

9

Comparative studies of the biological activities of lysosomotropic aminoesters and quaternary ammonium salts on the yeast Saccharomyces cerevisiae

51%

Oblak E., Lachowicz T. M., Luczynski J., Witek S.

Cellular and Molecular Biology Letters

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2001

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tom 06

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nr 4

871-880

10

The influence of amphiphilic derivatives of glycine esters on the electrical properties of Characeae cells membranes

51%

Janas T., Trela Z., Przestalski S., Witek S.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

11

Studies of Nitella action potentials in presence of quaternary ammonium salts and Kplus channels inhibitor-tetraethylammonium

51%

Trela Z., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1990

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tom 10

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nr 2

12

Lysosomotropic N,N- dimethyl alpha-aminoacid n-alkyl esters and their quaternary ammonium salts as plasma membrane and mitochondrial ATPases inhibitors

51%

Oblak E., Lachowicz T. M., Luczynski J., Witek S.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr 4

A set of n-alkyl esters of N,N-dimethylglycine (DMG-n) and their methobromides (DMGM-n) was synthesized, and their activities on yeast Saccharomyces cerevisiae were compared. The compounds differ in the number of carbon atoms in the aliphatic chain. Aminoesters with 12 carbon atoms appeared to be most active. Unlike quaternary ammonium salts previously tested, the activities of the compounds were not pH-dependent; the minimal inhibitory concentrations (MIC) were identical at pH 8 and at pH 6. In contrast to quaternary ammonium salts, aminoesters showed similar effects on respiratory sufficient (rho+) and respiratory deficient (rho°) mutants. When tested on glucose stimulated proton extrusion, aminoesters applied at MIC increased external pH. Aminoesters inhibited the plasma membrane H+-ATPase, whereas they were less inhibitory on the mitochondrial ATPase. In order to further compare the aminoesters and their corresponding quaternary ammonium salts, derivatives of N,N-dimethylalanine (DMAL-n and DMALM-n, respectively) were synthesized. The quaternary ammonium salts appeared to have a higher inhibitory potency than aminoesters, especially at pH 8, and alanine derivatives inhibited growth at a lower concentration than glycine derivatives. Both alanine derivatives of the aminoester and the quaternary ammonium salt inhibited the plasma membrane H+- ATPase at lower concentrations than glycine derivatives, but the alanine aminoester was without a detectable effect on the mitochondrial ATPase.

13

Partition coefficients of some glycine ester derivatives between lipid bilayer and water

51%

Rozycka-Roszak B., Maciag A., Przestalski S., Witek S.

Biophysics of Membrane Transport

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1988

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tom 09

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nr 2

14

Porównanie działania mono- i bis-amoniowych pochodnych estrów glicyny na proces desorpcji jonów wapniowych z błony liposomów lecytynowych

51%

Fogt A., Kuczera J., Witek S.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

15

The lethal effects of some olopnEhosphate insecticides on yeast Saccharomyces cerevisiae

51%

Ulaszewski S., Kolodynski J., Fekri A., Witek S.

Acta Microbiologica Polonica

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1980

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tom 29

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nr 3

16

Pozostałości tyreostatyków w tkankach zwierząt i żywności

51%

Witek S., Wozniak B., Zmudzki J., Sielska K.

Medycyna Weterynaryjna

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2012

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tom 68

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nr 02

Thyreostats are thioamid antithyroid drugs. The activity of these compounds consists in inhibiting the synthesis of thyroid hormones: triiodothyronine (T3) and thyroxine (T4), which favors the processes of fattening animals. The weight gain of animals is mainly due to water retention in their tissues and gastrointestinal tract. Because of the cancerogenic and teratogenic properties of thyreostatic drugs, their use for animal fattening has been banned in Europe since 1981. Control studies conducted in Poland show that thyreostats are not used in farm animals. Several cases of endogenous thiouracil content in the urine of cattle and pigs have been reported over recent years. This article presents the properties of thyreostatic compounds, discusses a possible cause of endogenous thiouracil occurrence, and provides an overview of methods used in the analysis of thyreostatic residues.

17

The interaction of some lysosomotropic substances with erythrocyte membranes

51%

Kleszczewska H., Bonarska D., Luczynski J., Witek S.

Cellular and Molecular Biology Letters

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2001

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tom 06

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nr 2A

400

18

Determination of the thyreostats in animal feeding stuffs using liquid chromatography - tandem mass spectrometry

51%

Wozniak B., Witek S., Matraszek-Zuchowska I., Zmudzki J.

Bulletin of the Veterinary Institute in Puławy

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2014

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tom 58

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nr 3

A rapid liquid chromatography tandem mass spectrometry method was developed and validated to detect and confirm five thyreostatic drugs: tapazole, thiouracil, methylthiouracil, propylthiouracil, and phenylthiouracil in animal feeding stuff samples. Thyreostats were extracted from feed with methanol, and then degreasing of the extract with petroleum ether was performed, followed by the derivatisation of the compounds with 3-iodobenzylbromide in basic medium (pH 8.0). The derivatives were extracted with diethyl ether and analysed by gradient elution on a Poroshell 120-EC C18 column with triple quadrupole MS detection with turbo spray source in positive ionisation mode. The method was validated in accordance with the Commission Decision 2002/657/EC. For validation level of 10 µg kg⁻¹, the recoven ranged from 82% to 97.5% for all examined compounds. The repeatability and reproducibility did not exceed the limit of 20% for all analytes. The linearity was good for all thyreostats in the whole range of tested concentrations, as proved by the correlation coefficients greater than 0.99. The decision limits (CCα) ranged from 1.63 µg kg⁻¹ to 3.95 µg kg⁻¹, whereas the detection capabilities (CCß) ranged from 2.74 µg kg⁻¹ to 6.73 µg kg⁻¹. The developed analysis is sensitive and robust, and therefore useful for quantification and confirmation of thyreostats in residue control programme.

19

Aggregation of amphiphilic derivatives of glycine esters by EPR

51%

Kuczera J., Witek S., Sentjurc M., Schara M.

Biophysics of Membrane Transport

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1988

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tom 09

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nr 2

20

Wyznaczanie współczynników podziału wybranych soli estrów glicyny między fazą wodną i lipidową

51%

Roszak B., Maciag A., Przestalski S., Witek S.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

Ograniczanie wyników

Dzis i jutro branzy piwowarskiej w Polsce. Nowe technologie w piwowarstwie

Effect of bis-ammonium quaternary salts on the red blood cells

Partition coefficient of single and double chains ammonium chlorides in liposome-water system. A 1H-NMR method using lanthanide probe ion Pr3plus

Desorption of Pr3plus ions fromliposome membranes by single and double-chain ammonium chlorides

Development of LC-MS/MS confirmatory method for the determination of testosterone in bovine serum

The effects of amphiphilic ammonium salts on the membrane potential and resistance of characeae cells

Effect of selected ammonium salts on properties of BLMs

Fluidity of lecithin liposomes modified by double-chain glycine esters

Comparative studies of the biological activities of lysosomotropic aminoesters and quaternary ammonium salts on the yeast Saccharomyces cerevisiae

The influence of amphiphilic derivatives of glycine esters on the electrical properties of Characeae cells membranes

Studies of Nitella action potentials in presence of quaternary ammonium salts and Kplus channels inhibitor-tetraethylammonium

Lysosomotropic N,N- dimethyl alpha-aminoacid n-alkyl esters and their quaternary ammonium salts as plasma membrane and mitochondrial ATPases inhibitors

Partition coefficients of some glycine ester derivatives between lipid bilayer and water

Porównanie działania mono- i bis-amoniowych pochodnych estrów glicyny na proces desorpcji jonów wapniowych z błony liposomów lecytynowych

The lethal effects of some olopnEhosphate insecticides on yeast Saccharomyces cerevisiae

Pozostałości tyreostatyków w tkankach zwierząt i żywności

The interaction of some lysosomotropic substances with erythrocyte membranes

Determination of the thyreostats in animal feeding stuffs using liquid chromatography - tandem mass spectrometry

Aggregation of amphiphilic derivatives of glycine esters by EPR

Wyznaczanie współczynników podziału wybranych soli estrów glicyny między fazą wodną i lipidową