Category Archive for "Year 2011 Issue 7"

Disposal methods and treatment of wastes from piggeries.

Disposal methods and treatment of wastes from piggeries KWAŚNY J., KOWALSKI Z., BANACH M. Please cite as: CHEMIK 2011, 65, 7, 687-696 Slurry is a waste from the pig farming, which is onerous for the environment. The basic way to utilize manure is the production of organic and organic -mineral fertilizers. As a source of substances influencing positively on plants and soil, is a substrate of compost. Biogas is produced in an economical way from pig slurry mixed with fruit waste. The issue of...

Recovery of phosphate (V) ions from liquid waste solutions containing organic impurities

Recovery of phosphate(V) ions from liquid waste solutions containing organic impurities KOZIK A., HUTNIK N., MATYNIA A., GLUZIŃSKA J., PIOTROWSKI K. Please cite as: CHEMIK 2011, 65, 7, 675-686 Struvite was continuously produced from water solutions containing phosphate(V) ions (0.20 mass %), magnesium and ammonium ions in stoichiometric proportions, as well as lactic acid (0.03 or 0.06 mass %). Reaction crystallization of struvite was carried out in temperature 298 K in DT MSMPR type crystallizer with internal circulation of suspension. Influence of pH (from 8.5...

FT-IR studies of zeolites from different structural groups

FT-IR studies of zeolites from different structural groups MOZGAWA W., KRÓL M., BARCZYK K. Please cite as: CHEMIK 2011, 65, 7, 667-674 The paper presents the results of FT-IR studies of zeolites (mainly natural) belonging to the seven major structural groups. Interpretation of vibrational spectra has been based on the identification of the bands associated with typical SBU vibrations. On the grounds of the previous works [4, 5], in which, based on ab initio calculations, visualization of vibration obtained for the structural units composed...

The use of gas chromatography coupled with mass spectrometry (GC-MS) to the identification of fine chemicals

The use of gas chromatography coupled with mass spectrometry (GC-MS) to the identification of fine chemicals Feliczak -Guzik A., Jagodzińska K., Nowak I Please cite as: CHEMIK 2011, 65, 7, 661-666 Gas chromatography ? mass spectrometry (GC-MS) is very useful analytical method for evaluation of the quality of chemicals. It combines the features of gas chromatography and mass spectrometry to help identify different substances within the tested sample. Applications of GC-MS include drug detection, environmental analysis and identification of unknown samples. This method is fast,...

Spectrophotometric determination of UV protection provided by cosmetic products with sunscreen properties

Spectrophotometric determination of UV protection provided by cosmetic products with sunscreen properties WAWRZYŃCZAK A., NOWAK I. Please cite as: CHEMIK 2011, 65, 7, 655-660 The UV protection provided by sunscreens is an issue of raising importance due to the constantly increasing knowledge about the negative effects that UV radiation induces in the human skin. A number of recent studies have shown that not only the most damaging UVB irradiation (290÷320 nm), but also UVA irradiation (320÷400 nm) causes skin damage. The rating system for...

Significance of UV-Vis spectroscopy in in vitro release studies

Significance of UV-Vis spectroscopy in in vitro release studies GOŚCIAŃSKA J., OLEJNIK A., SOBIESZCZUK E., LATANOWICZ K., NOWAK I. Please cite as: CHEMIK 2011, 65, 7, 649-654 The in vitro release studies of the active substance with the use of dialysis membrane imitating the skin barrier have been carried out by pharmaceutical concerns for many years. The results contributed to the development of spectroscopic methods which enable estimation of the release rate of active compounds from semisolid dosage forms to a liquid medium as well...

Ibuprofen. UV-Vis and IR techniques for drug identification in porous carriers

UV-Vis and IR techniques for drug identification in porous carriers WALCZAK-ZEIDLER K., NOWAK I. Please cite as: CHEMIK 2011, 65, 7, 643-648 Porous materials have been recently considered as promising carriers of active compounds. In this work silica structures of SBA-15 type modified with niobium and organic groups are proposed as potential ibuprofen carriers. To confirm the presence of drug inside the material FT-IR and DRUV-Vis spectroscopies are used. Additionally, the ibuprofen release profile has been determined by spectroscopic measurement of drug amount in...

Applying of spectroscopic methods in the investigation of radical polymerization processes and products

Applying of spectroscopic methods in the investigation of radical polymerization processes and products PABIN-SZAFKO B., WIŚNIEWSKA E. Please cite as: CHEMIK 2011, 65, 7, 637-642 The utilization of spectroscopic methods in polymer chemistry allows obtaining the necessary information to identify the chemical structure of compounds and moreover different processes studies, starting from initiator synthesis, their behaviour at various conditions (e.g. during thermal decomposition), through the other polymerization substrates and products study, and also other processes ? polymers modification or destruction investigations. Keywords: radical polymerization, azoinitiators, UV-Vis...

Application of FT-IR spectrophotometry in the assessment of changes in composition of greases induced by mechanical action

Application of FT-IR spectrophotometry in the assessment of changes in composition of greases induced by mechanical action SIWIEC E., PAWELEC E., MOLENDA J. Please cite as: CHEMIK 2011, 65, 7, 633-636 The paper presents results of studies of the effect of tribological tests on changes in the composition of greases. To this end IR spectra of the unaffected greases have been registered and compared with the spectra of greases acted upon mechanically. Bands characteristic of the compounds studied were identified and changes thereof were assessed....

Application of fluorescence in measuring oxygen concentration in packages

Application of fluorescence in measuring oxygen concentration in packages KOZAK W. Please cite as: CHEMIK 2011, 65, 7, 627-632 The surplus of oxygen content in the package is a serious problem considering the quality of packed products, in particular food products. In the majority of cases, oxygen is a factor stimulating unfavourable changes which are manifested by deterioration of sensory properties, reduction of nutritional value, and even reduction of health safety of food products. Thus, the possibility to control oxygen content in the package in...

Category Archives: Year 2011 Issue 7