Tag Archives: Małgorzata JAWORSKA

Sorbitol and cellulose derivatives as gelling agents

Małgorzata JAWORSKA, Otmar VOGT ? Institute of Chemistry and Organic Technology, Cracow University of Technology, Cracow, Poland Abstract: Gels are the substances with great significance in food industry, pharmaceuticals and cosmetics production as well as in construction chemistry. To form an appropriate consistence of chemical reparations is extremely important for their application properties. A significant difficulty in obtaining gel structure lies in the diversified properties (hydrophobic and hydrophilic) of the ngredients in the preparation. Thus the role of the gelling agent is to maintain, at the same time, these both components. The present paper discusses the methods of preparation of sorbitol and ellulose derivatives. It also proves that these two are effective agents meeting the above requirements. Please cite as: CHEMIK 2013, 67, 3, 242-249 Introduction Thickeners and gelling agents in the mixtures of organic solvents and water solutions are widely applied in many branches of industry thanks to their ability to provide the products with the desired utility features e.g. consistency, viscosity...
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Rosemary ? a plant rich in biologically active compounds

Krystyna NOWAK, Małgorzata JAWORSKA, Jan OGONOWSKI Institute of Chemistry and Organic Technology, Cracow University of Technology, Cracow, Poland Abstract: The aim of this study is to present the characteristics of biologically active compounds contained in the rosemary (such as rosemary oil, flavonoids, terpenes, phenolic acids) and their use in pharmaceutical, cosmetic and food industries. Please cite as: CHEMIK 2013, 67, 2, 133-138 Introduction Rosemary ( Rosmarinus officinalis L.) is an aromatic, evergreen plant which grows in the wilderness on the coasts of Mediterranean Sea and in the southern part of Crimea. In Poland the only possibility is to grow it in a greenhouse. Rosemary used to be well known and grown in the ancient times. The Romes called it a flower of the sea. Its name derives from Latin from words rosa- rose and marinus ? nautical. The well smelled scent of rosemary on the seas indicated the moment of approaching a shore. The most recognizable herbalist of Middle Ages, Saint Hildgerard from Bingen...
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Influence of kind and concentration of emulsifiers from the group of polyethoxylated fatty acids sorbitol esters on the rheological properties of Crodamol PC-based nanoemulsions

Małgorzata JAWORSKA, Elżbieta SIKORA, Jan OGONOWSKI ? Institute of Chemistry and Organic Technology, University of Technology, Cracow, Poland Abstract: The aim of this work was the preparation and rheological characterization of o/w nanoemulsions stabilized by polysorbates, containing Crodamol PC as the oil phase. The formulations were prepared by phase inversion composition method. Measurements of the internal phase droplets size were carried  out using Malvern Zetasizer apparatus. The rheological properties of the emulsions systems were studied by using Brookfield rheometer, Model - R/S Plus. The obtained results confirmed that the prepared nanoemulsions showed non-Newtonian, pseudo-plastic behavior. Please cite as: CHEMIK 2013, 67, 2, 119-126 Introduction The effectiveness of cosmetic products depends largely on their physicochemical form. A relatively new form of cosmetic products is nanoemulsions, liquid dispersion systems of internal phase particles size of 20 ? 500 nm. Particles of nanoemulsions are too small to scatter visible light, which makes them optically transparent or translucent. Due to its properties (a large interfacial surface area, low...
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