Central European Journal of Chemistry
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2H Chemical-shift resolution and dipolar2H-1H,2H-15N correlations in solid-state MAS NMR spectroscopy for structure determination and distance measurements in hydrogen-bonded systems
Central European Journal of Chemistry - Tập 3 - Trang 245-251 - 2005
In solid-state NMR, deuteron (2H) spectroscopy can be performed in full analogy
to1H spectroscopy, including2H chemical-shift resolution and2H-X dipolar
correlation schemes, when the NMR experiments are conducted in a
“rotor-synchronized” fashion under fast magic-angle spinning. Here, 2H-X NMR
experiments of this type, including2H-15N and2H-1H chemical-shift correlations
and distance measurements,...
Rapid flow injection electrochemical detection of 3,3′,4,4′ tetrachlorobiphenyl using stabilized lipid membranes with incorporated sheep antibody
Central European Journal of Chemistry - Tập 11 - Trang 320-323 - 2012
An electrochemical biosensor based on a supported polymerized lipid film with
incorporated sheep anti-3,3′,4,4′ tetrachlorobiphenyl (PCB congener 77) antibody
using flow injection analysis was developed. The polymerized lipid film
contained 85% (w/w) dipalmitoylphosphatidylcholine (DPPC) and 15% (w/w)
dipalmitoylphosphatidic acid (DPPA), methacrylic acid, ethylene glycol
dimethacrylate, AIBN and s...
Effects of mechanical activation on structure and photocatalytic properties of ZnO powders
Central European Journal of Chemistry - Tập 11 - Trang 1780-1785 - 2013
Zinc oxide (ZnO) was mechanically activated in air using a planetary ball mill
using varying milling speeds and time. The obtained samples were analyzed by
X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and UV-Vis
diffusion reflectance spectroscopy. The photocatalytic activity of the
mechanically treated ZnO powders were investigated in the reaction of Malachite
Green (MG) de...
Determination of galacturonic acid content in pectin from fruit juices by liquid chromatographydiode array detection-electrospray ionization tandem mass spectrometry
Central European Journal of Chemistry - - 2010
A reversed-phase high-performance liquid chromatographic (HPLC) method is
applied for the determination of galacturonic acid (GA) of pectins in different
commercial fruit juices. The separation was carried out on a C18 column using
precolumn derivatization with p-aminobenzoic acid (p-ABA) and UV detection at
304 nm. The identification of GA was confirmed by high-performance liquid
chromatography/e...
Extraction-spectrophotometric investigations on two ternary ion-association complexes of gallium(III)
Central European Journal of Chemistry - Tập 10 - Trang 1262-1270 - 2012
Complex formation and liquid-liquid extraction were studied in systems
containing Ga(III), azoderivative of resorcinol {4-(2-pyridylazo)resorcinol
(PAR) or 4-(2-thiazolylazo)resorcinol (TAR)}, 2,3,5-triphenyltetrazolium
chloride (TTC), water and chloroform. The optimum conditions w.r.t. pH,
extraction time, concentration of ADR and concentration of TTC for the
extraction of Ga(III) as an ion-assoc...
Effect of selenium in organic and inorganic form on liver, kidney, brain and muscle of Wistar rats
Central European Journal of Chemistry - Tập 10 - Trang 1442-1451 - 2012
Selenium is a micronutrient, localized in the active sites of enzymes such as
glutathione peroxidase and thioredoxin reductase, and participating together
with these enzymes in an antioxidant defence system of organisms against free
radicals. Administration of selenium is necessary for maintaining oxidative
homeostasis. The present experiment is aimed at investigation of selenium impact
on basal m...
A new zinc complex of 1-propyl-1H-benzo[d] imidazole: synthesis, characterization and electrocatalysis
Central European Journal of Chemistry - Tập 8 - Trang 646-651 - 2010
The present work reports the synthesis, characterization and performance of a
new zinc(II) complex of [Zn(C3H7-bim)2Br2] (bim = benzimidazole) as
electrocatalyst for trichloroacetic acid and bromate reduction. Its structure
was characterized by X-ray crystallography, IR spectroscopy and elemental
analysis. The zinc atom adopts a distorted tetrahedral geometry by coordinating
to two bromine atoms a...
Rosehip extraction: Process optimization and antioxidant capacity of extracts
Central European Journal of Chemistry - Tập 12 - Trang 502-508 - 2014
This article examines the extraction of rosehip to study the recovery of a
number of compounds with antioxidant properties (polyphenols, flavonoids, and
β-carotene). Two varieties of rosehip, cultivated and wild are used as raw
material. A detailed study of the process kinetics at different operating
conditions is carried out in order to determine appropriate processing
parameters, which results i...
Fabrication of superhydrophobic surface of stearic acid grafted zinc by using an aqueous plasma etching technique
Central European Journal of Chemistry - Tập 10 - Trang 1766-1772 - 2012
A stable superhydrophobic surface of stearic acid grafted zinc was fabricated
with two steps, that is, the zinc surface was firstly treated with glow
discharge electrolysis plasma (GDEP) and then followed by a grafted reaction of
stearic acid onto the treated zinc surface. Results indicated that the
wettability of zinc substrate changed from superhydrophily to
superhyphodrobicity with a water cont...
Matrix isolation FTIR spectroscopical study of ethene secondary ozonide
Central European Journal of Chemistry - Tập 5 - Trang 71-86 - 2007
A new method is used for the separation of ethene secondary ozonide (SOZ) from
the other products of ethene ozonization reaction. The reaction was performed in
the neat films of the reactants at 77 K. Ethene SOZ was separated from other
products of the reaction by vacuum distillation at 190–210 K and analyzed by
means of the matrix isolation IR absorption spectroscopy. Spectroscopic data
from phot...
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