Category Archive for "Year 2014 Issue 4"

Porphyrin chemosensor. Interaction of 2H-porphyrins with selected electron acceptors

Porphyrin chemosensor. Interaction of 2H-porphyrins with selected electron acceptors
DYRDA G., SŁOTA R., MELE G.

Please cite as: CHEMIK 2014, 68, 4, 396–401

The possibility to use 5,10,15,20-tetrakis-[-4–2-(3-pentadecylphenoxy)-ethoxy]phenylporphyrin as a chemosensor for the detection of electron acceptors: HCl, TFA and BF3 in solid-phase in the form of thin film on glass carrier plate and in liquid phase in benzene. When chemosensor is under the influence of acceptor, the characteristic changes occur in the...

Crystalline structures of salts of oxalic acid and aliphatic amines

Crystalline structures of salts of oxalic acid and aliphatic amines
DZIUK B., EJSMONT K., ZALESKI J.

Please cite as: CHEMIK 2014, 68, 4, 391–395

The article analyses crystalline structures of salts of oxalic acid and aliphatic amine. In such network there is multitude of arrangement forms for both mononegative and binegative oxalic acid anions. Mononegative anions might form cyclic dimers or arrange in linear chains of nature resembling stepwise structure, as well as...

Hybrid photocatalysts with a TiO2 matrix sensitized with lanthanide phthalocyanines

Hybrid photocatalysts with a TiO2 matrix sensitized with lanthanide phthalocyanines
SŁOTA R., DYRDA G., GALBAS M., MELE G.

Please cite as: CHEMIK 2014, 68, 4, 385–390

Research results on the activity of novel hybrid photocatalysts with a TiO2 (anatase) matrix impregnated with lanthanide diphthalocyanines (LnPc2) in photooxidation of 4-nitrophenol in the water phase have been reported. It was found that in presence of an appropriate phthalocyanine sensitizer the degradation rate of 4-NP...

Enzymatic slow-binding inhibition

Enzymatic slow-binding inhibition
PAWEŁCZAK M. , HUREK J.

Please cite as: CHEMIK 2014, 68, 4, 377–384

Enzyme inhibitors are produced mostly for applications in medicine, crop protection and food industry. Inhibitors slow-binding with enzyme are a group of non-classical inhibitors and such type of inhibition requires more complex analysis of kinetic data. The knowledge of enzyme inhibition mechanisms by inhibitors plays essential role for designing new, more effective compounds of such type. Below,...

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties
NACKIEWICZ J., SUCHAN A., KLIBER M.

Please cite as: CHEMIK 2014, 68, 4, 369–376

The article presents synthesis methods of octacarboxyphthalocyanines, MPcOC. Their UV-Vis absorption spectra, their association and selected photochemical and catalytic properties are also discussed. Moreover, the article describes the impact of quaternary ammonium salts on UV-Vis spectra and CuPcOC association, fluorescence of aqueous solutions of ZnPcOC and catalytic activity of...

Structural and electron aspects of nitrogen–nitrogen bond

Structural and electron aspects of nitrogen–nitrogen bond
GAJDA K., ZARYCHTA B., EJSMONT K.

Please cite as: CHEMIK 2014, 68, 4, 363–368

Nitrogen, like many other chemical elements, has catenation ability. The largest family of compounds containing N_x systems are compounds containing two nitrogen atoms, and the most numerous among them are hydrazo, azo, azoxy, azodioxy compounds and compounds with nitramine group. In the presented studies for determining changes in nitrogennitrogen bond length, average...

The biotechnological potential of cyanobacteria forming blue-green algal blooms

The biotechnological potential of cyanobacteria forming blue-green algal blooms
KASOWSKA-ŻOK E., OSTROWSKA M., STUDNIK h., BALCERZAK L ., ŻYSZKA B., DRZYZGA d., BAZGIER G., KAFARSKI P., LIPOK J.

Please cite as: CHEMIK 2014, 68, 4, 355–362

Cyanobacteria adaptability related to their specific „flexible” metabolism that characterizes these microorganisms enables their use as biocatalysts in biotransformation processes of natural and synthetic compounds. Other qualities of blue-green algae allow to use them in bioremediation of...

Studies of material resistance against natural environmental factors

Studies of material resistance against natural environmental factors
SOBKÓW d., BARTON J., CZAJA K., SUDOŁ M, MAZOŃ B.

Please cite as: CHEMIK 2014, 68, 4, 347–354

This work presents fundamental aspects of material resistance to environmental conditions, including number of atmospheric conditions and biosphere. These areas for many years have been important research topics in the Division of Chemical Technology and Polymer Chemistry of the Faculty of Chemistry, Opole University – the...

Errors in the studies of enzymatic reactions resulting from unforeseen oxidation-reduction reactions

Errors in the studies of enzymatic reactions resulting from unforeseen oxidation-reduction reactions
GĄSOWSKA-BAJGER B., WOJTASEK h.

Please cite as: CHEMIK 2014, 68, 4, 341–346

Enzymatic reactions are usually monitored using spectrophotometric measurements at one wavelength. Such measurements usually pose no risk, if a standard substrate that gives known product is used. However, if a mixture of compounds is studied, e.g. a substrate and potential inhibitors, this may lead to serious errors. In such...

Chemical markers of varietal unifloral honeys

Chemical markers of varietal unifloral honeys
JASICKA-MISIAK I., KAFARSKI P.

Please cite as: CHEMIK 2014, 68, 4, 335–340

Among bee products, the honey is one most appreciated by consumers. Polish bee-keepers are famous for production of honey with great taste and good nutritious and therapeutic qualities. Unfortunately, there are more and more cases of honey adulteration and therefore, it is necessary to seek new methods that could be used in testing their quality....

Category Archives: Year 2014 Issue 4

Porphyrin chemosensor. Interaction of 2H-porphyrins with selected electron acceptors DYRDA G., SŁOTA R., MELE G.

Crystalline structures of salts of oxalic acid and aliphatic amines DZIUK B., EJSMONT K., ZALESKI J.

Hybrid photocatalysts with a TiO2 matrix sensitized with lanthanide phthalocyanines SŁOTA R., DYRDA G., GALBAS M., MELE G.

Enzymatic slow-binding inhibition PAWEŁCZAK M. , HUREK J.

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties NACKIEWICZ J., SUCHAN A., KLIBER M.

Structural and electron aspects of nitrogen–nitrogen bond GAJDA K., ZARYCHTA B., EJSMONT K.

The biotechnological potential of cyanobacteria forming blue-green algal blooms KASOWSKA-ŻOK E., OSTROWSKA M., STUDNIK h., BALCERZAK L ., ŻYSZKA B., DRZYZGA d., BAZGIER G., KAFARSKI P., LIPOK J.

Studies of material resistance against natural environmental factors SOBKÓW d., BARTON J., CZAJA K., SUDOŁ M, MAZOŃ B.

Errors in the studies of enzymatic reactions resulting from unforeseen oxidation-reduction reactions GĄSOWSKA-BAJGER B., WOJTASEK h.

Chemical markers of varietal unifloral honeys JASICKA-MISIAK I., KAFARSKI P.

Porphyrin chemosensor. Interaction of 2H-porphyrins with selected electron acceptors
DYRDA G., SŁOTA R., MELE G.

Crystalline structures of salts of oxalic acid and aliphatic amines
DZIUK B., EJSMONT K., ZALESKI J.

Hybrid photocatalysts with a TiO2 matrix sensitized with lanthanide phthalocyanines
SŁOTA R., DYRDA G., GALBAS M., MELE G.

Enzymatic slow-binding inhibition
PAWEŁCZAK M. , HUREK J.

Octacarboxyphthalocyanines – compounds of interesting spectral, photochemical and catalytic properties
NACKIEWICZ J., SUCHAN A., KLIBER M.

Structural and electron aspects of nitrogen–nitrogen bond
GAJDA K., ZARYCHTA B., EJSMONT K.

The biotechnological potential of cyanobacteria forming blue-green algal blooms
KASOWSKA-ŻOK E., OSTROWSKA M., STUDNIK h., BALCERZAK L ., ŻYSZKA B., DRZYZGA d., BAZGIER G., KAFARSKI P., LIPOK J.

Studies of material resistance against natural environmental factors
SOBKÓW d., BARTON J., CZAJA K., SUDOŁ M, MAZOŃ B.

Errors in the studies of enzymatic reactions resulting from unforeseen oxidation-reduction reactions
GĄSOWSKA-BAJGER B., WOJTASEK h.

Chemical markers of varietal unifloral honeys
JASICKA-MISIAK I., KAFARSKI P.