Wyniki wyszukiwania

1

An approximate cooperativity analysis of the phase transitions of DPPC-DOCna dispersions

100%

Hobai S., Fazakas Z.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr 2

2

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Analysis of the free amino acid content in pollen of nine Asteraceae species of known allergenic activity

88%

Mondal A. K., Parui S., Mandal S.

Annals of Agricultural and Environmental Medicine

|

1998

|

tom 05

|

nr 1

3

Effects of Echinostoma caproni miracidia dose on the amino acid contents of Biomphalaria glabrata as determined by high-performance thin-layer chromatography

75%

Nguyen M., Fried B., Sherma J.

Acta Parasitologica

|

2016

|

tom 61

|

nr 1

4

Prostaglandins of Tetrahymena pyriformis GL-C and T. rostrata

75%

Szablewski L., Hadas E.

Acta Protozoologica

|

1991

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tom 30

|

nr 3-4

5

Synthesis of 5-IASA-UDP-GlcNAc and its use for the photoaffinity labeling of a novel UDP-GlcNAc pyrophosphorylase

75%

Szumilo H., Szumilo T., Elbein A. D.

Acta Biochimica Polonica

|

1995

|

tom 42

|

nr 1

Photoreactivable 5-l3-(p-iodoazidosalicylamide)allylJ-UDP-GlcNAc (5-IASA-UDP- -GlcNAc) was synthesized by a four-step procedure and used for photoaffinity labeling of UDP-GlcNAc-dependent enzymes. Upon iodination with 12SI, the compound was successfully applied to probe a purified UDP-GlcNAc pyrophosphorylase from pig liver. The enzyme was photoinactivated by the probe in the concentration-dependent manner, and was protected by UDP-GlcNAc and, to a lesser extent, by UTP and UDP-GlcCOOH.

6

Factors conditioning biosynthesis of prostaglandins in pathogenic and non-pathogenic strains of Acanthamoeba castellanii

63%

Hadas E.

Acta Protozoologica

|

1988

|

tom 27

|

nr 3-4

7

Zastosowanie chromatografii cienkowarstwowej w analizie wybranych srodkow ochrony roslin

63%

Silowiecki A., Dudkowska S.

Progress in Plant Protection

|

2004

|

tom 44

|

nr 2

1086-1088

8

Carotenoids in the Norway haddock - Sebastes marinus L.

63%

Czeczuga B., Czeczuga-Semeniuk E.

Bulletin of the Sea Fisheries Institute

|

1998

|

nr 1

9

Detection of the metabolic hormone residues in the urine and muscles of food - producing animals by HPTLC with application of extraction into a solid phase

63%

Wozniak B., Wojton B.

Bulletin of the Veterinary Institute in Puławy

|

1996

|

tom 40

|

nr 1

A simple method for determination of 8 anabolie hormone residues in the muscles and urine of slaughter animals was elaborated. Forty cattle muscle samples and 30 urine samples fortified with diethyl stilbestrol, dienstrol, hexastrol, zeranol, trenbolone, trenbolone acetate, 19-nortesterone, and medroxyprogesterone acetale at concentrations of 1 to 20 ng/g (ppb) were examined. The hormones were extracted with methanol and the methanol phase was degreased with n-hexane and extracted with diethyl ether. The ether layer was washed with carbonate buffer and water evaporated to dryness. The residues were dissolved in acetate buffer and cleaned up by extraction into the solid phase on C18 columns. In urine, the hormones were extracted with diethyl ether followed by the procedure corresponding to that for muscles. After evaporating and dissolving in acetone the samples were analysed by two-dimentional HPTLC methods. The chromatograms were developed with 5% sulphuric acid in ethanol. The detection limit of the hormones examined on the HPTLC plate was 5-20 ng, and in the tissue 1 ppb for trenbolone and 2 ppb for the remaining compounds.

10

Investigation of antibacterial metabolites produced by Streptomyces flavescens B-2223

63%

Kolomiets E. I., Zdor N. A., Romanovskaya T. V.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

2003

|

tom 51

|

nr 2

11

Inability of thin-layer chromatography to distinguish feces from congeneric foxes by their bile acid contents

63%

Jimenez J. E., Yanez J. L., Jaksic F. M.

Acta Theriologica

|

1996

|

tom 41

|

nr 2

We used thin-layer chromatography of fecal bile acids in an attempt to separate feces of culpeo fox Pseudalopex culpaeus (Molina, 1782) from those of chilla fox P. griseus (Gray, 1837). We tested the method with pure bile acids and with feces from known fox species on two different plate types. Results differed according to the plate type used. The technique failed to distinguish scats from the two fox species. We found variability in the spot pattern of bile acids within species, and within individuals, likely associated to the diet. The location of the spots {Rf values) also varied with the concentration of the sample, and the color and location changed with different plate types. We warn that the thin-layer chromatography of fecal bile acids is still unreliable for distinguishing feces between sympatric carnivores. Hence, we propose to rely on alternative techniques.

12

Oznaczanie etylobicyklofosforanu w materiale biologicznym metoda chromatografii gazowej

51%

Kalski A., Smok W.

Bromatologia i Chemia Toksykologiczna

|

1992

|

tom 25

|

nr 1

69-71

A gas chromatographic procedure using methylbicyclophosphorothionate as an internal standard, for the determination of ethylbicyclophosphate in the brain, blood, and liver of small laboratory animals, was elaborated. The compound was extracted from the tissue with acetonitrile, and re-extracted from 2.5% sodium sulfate solution with chloroform. After evaporation of the solvent, the residue was dissolved in acetone. Chromatographic partition was carried out using a glass column (4 m x 0.4 cm) packed with 3% OV-17 on W/H.P. chromosorb at 250°C. Recovery of ethylbicyclophosphate ranged from 65% to 95%. Linear relationship of standard curve within the concentration range from 0.4 to 4.0 µg of ethylbicyclophosphate, was found. Precision for the assay of 2.0 µg samples, was 7.36%.

13

Quantification of L-DOPA, lupeol and beta-sitosterol from leaves of Clerodendrum phlomidis by TLC

51%

Raja M. M., Mishra S. H.

Herba Polonica

|

2009

|

tom 55

|

nr 4

44-51

Clerodendrum phlomidis Linn. f. of the family Lamiaceae is an important and well known medicinal plant in Ayurveda and Siddha system of medicines. To ensure identity, quality of the plant material and considering the wide therapeutic application of L-DOPA, lupeol and β-sitosterol, the present study was planned to quantify these marker constituents by TLC method. The amount of L-DOPA, lupeol and β-sitosterol quantified from the leaves of C. phlomidis were 0.06806, 0.01733 and 0.06324 % w/w, respectively. This TLC procedure may be used effectively for identity, quality evaluation as well as quantitative determination for this plant or its derived products.

14

Oznaczanie pozostalosci desmedifamu i fenmedifamu w roslinach metoda chromatografii cienkowarstwowej i gazowej

51%

Murawska M., Giza I., Sztwiertnia U.

Progress in Plant Protection

|

2001

|

tom 41

|

nr 2

562-565

15

Aktywnosc przeciwutleniajaca frakcji zwiazkow fenolowych z nasion soi

51%

Karamac M., Amarowicz R.

Bromatologia i Chemia Toksykologiczna

|

2002

|

tom 35

|

nr 2

99-105

Z odtłuszczonych nasion soi wyekstrahowano związki fenolowe 80% (v/v) roztworem metanolu. Uzyskany ekstrakt rozdzielono na sześć frakcji (I- VI) stosując chromatografią kolumnową na żelu Sephadex LH-20 z metanolem jako fazą ruchomą. W uzyskanych frakcjach oznaczono zawartość fenoli ogółem i zarejestrowano widma UV. Frakcje scharakteryzowano również za pomocą chromatografii cienkowarstwowej na żelu krzemionkowym. Aktywność przeciwutleniającą mierzono w układzie modelowym z ß-karo- tenem i kwasem linolenowym.

16

Oznaczanie sulfonamidow w miodach pszczelich metoda TLC

51%

Piekut J., Borawska M. H., Rodziewicz L.

Bromatologia i Chemia Toksykologiczna

|

2005

|

tom 38

|

nr Supl.

395-398

Celem pracy było przeprowadzenie oznaczeń obecności sulfonamidów w dostępnych w handlu naturalnych miodach pszczelich z zastosowaniem chromatografii cienkowarstwowej (TLC) jako metody przesiewowej do wykrywania tych zanieczyszczeń.

17

Allelopathic activity of the norharmane-producing cyanobacterium Synechocystis aquatilis against cyanobacteria and microalgae

51%

Mohamed Z. A.

Oceanological and Hydrobiological Studies

|

2013

|

tom 42

|

nr 1

18

Czerwony olej palmowy jako zrodlo tokochromanoli

51%

Gogolewski M.

Rośliny Oleiste - Oilseed Crops

|

1995

|

tom 16

|

nr 2

333-340

19

Physico-chemical characterization and microbial studies of muscle lipid of Liner silver grunter (Pomadasys hasta) of the Bay of Bengal

51%

Jahan F., Uddin M. H., Bhattacharjee S. C.

International Letters of Natural Sciences

|

2016

|

tom 58

Lipid was extracted from the lipid containing muscle of Liner silver grunter (Pomadasys hasta) by solvent extraction and then purified by standard method. The physico-chemical properties of lipid sample were determined and compared with those of other standard fats and oils. Fatty acid composition of the lipid sample was investigated by Thin Layer Chromatographic (TLC) examination. Gas Liquid Chromatographic (GLC) examination was performed by the methyl esters mixture prepared from the lipid sample. The de-oiled muscle of the fish was studied for the determination of ash content, fiber content, moisture content and protein content. The lipid containing selected muscle was analyzed quantitatively for the determination of percentages of protein, cholesterol and minerals (N, P, K, Ca, and Na). The lipid containing muscle was also analyzed for the determination of the amount of eleven metals by using Atomic Absorption Spectrophotometric method. The lipid sample was evaluated by microbial activity (bacterial activity against nine bacteria and fungal activity against seven fungi).

20

Use of solid phase extraction and thin-layer chromatography in screening procedure for quantitation of ethanolamine and its methylated forms in rat liver cells

51%

Bazylak G.

Applied Biology Communications. Lublin Scientific Center

|

1993

|

tom 03

|

nr 3-4

Ograniczanie wyników

An approximate cooperativity analysis of the phase transitions of DPPC-DOCna dispersions

Analysis of the free amino acid content in pollen of nine Asteraceae species of known allergenic activity

Effects of Echinostoma caproni miracidia dose on the amino acid contents of Biomphalaria glabrata as determined by high-performance thin-layer chromatography

Prostaglandins of Tetrahymena pyriformis GL-C and T. rostrata

Synthesis of 5-IASA-UDP-GlcNAc and its use for the photoaffinity labeling of a novel UDP-GlcNAc pyrophosphorylase

Factors conditioning biosynthesis of prostaglandins in pathogenic and non-pathogenic strains of Acanthamoeba castellanii

Zastosowanie chromatografii cienkowarstwowej w analizie wybranych srodkow ochrony roslin

Carotenoids in the Norway haddock - Sebastes marinus L.

Detection of the metabolic hormone residues in the urine and muscles of food - producing animals by HPTLC with application of extraction into a solid phase

Investigation of antibacterial metabolites produced by Streptomyces flavescens B-2223

Inability of thin-layer chromatography to distinguish feces from congeneric foxes by their bile acid contents

Oznaczanie etylobicyklofosforanu w materiale biologicznym metoda chromatografii gazowej

Quantification of L-DOPA, lupeol and beta-sitosterol from leaves of Clerodendrum phlomidis by TLC

Oznaczanie pozostalosci desmedifamu i fenmedifamu w roslinach metoda chromatografii cienkowarstwowej i gazowej

Aktywnosc przeciwutleniajaca frakcji zwiazkow fenolowych z nasion soi

Oznaczanie sulfonamidow w miodach pszczelich metoda TLC

Allelopathic activity of the norharmane-producing cyanobacterium Synechocystis aquatilis against cyanobacteria and microalgae

Czerwony olej palmowy jako zrodlo tokochromanoli

Physico-chemical characterization and microbial studies of muscle lipid of Liner silver grunter (Pomadasys hasta) of the Bay of Bengal

Use of solid phase extraction and thin-layer chromatography in screening procedure for quantitation of ethanolamine and its methylated forms in rat liver cells