Agnieszka Feliczak-Guzik

Application of novel hierarchical niobium-containing zeolites for synthesis of alkyl lactate and lactic acid

Novel hierarchical niobium-containing zeolites were synthesized for the first time and applied for isomerization of dihydroxyactetone to alkyl lactate and lactic acid (95-97% yield). These materials possess secondary mesoporosity, thus facilitating access to active sites of the material by larger reagent molecules, preserving acidity and crystallinity of the zeolites.

Nanostructures: General information. The use of nanoobjects in medicine and cosmetology

Obserwowane na całym świecie dążenie do miniaturyzacji systemów technologicznych, jak i materiałów, spowodowało intensywny rozwój nanotechnologii technologii bazującej na nanomateriałach. Nanotechnologia jest bardzo szybko rozwijającą się dziedziną nauki, zajmującą się otrzymywaniem i stosowaniem nanomateriałów, a więc struktur nanometrycznych, czyli takich, w których jeden z wymiarów nie przekracza umownej granicy 100 nm. Tworzenie nanostruktur ma na celu generowanie nowych bądź często lepszych właściwości fizycznych, chemicznych i biologicznych w porównaniu ze znanymi już materiałami mikrooraz makrometrycznymi. Swoiste właściwości nanoobiektów wynikające z ich niewielkiego rozmiaru sprawiły, iż badania nad nimi budzą ogromne zainteresowanie w środowiskach zajmujących się nanoproblematyką [22].

Nanosunscreens: from nanoencapsulated to nanosized cosmetic active forms

Abstract Personal care products often contain nanosized components, such as nanoscopic vesicles. Nanosized metal oxides and nanoencapsulated UV organic filters have brought many attentions and technological advantages to sunscreen cosmetic products. Nanosized metal oxide particles are recently in- and extensively used to broaden the protection spectrum and increase the SPF factor by reflecting, scattering and/or absorbing UV radiation. Modern sunscreens contain mineral filters—insoluble titanium dioxide (TiO2), zinc oxide (ZnO) or ceria (CeO2) and zirconia (ZrO2) nanoparticles. Nanosized metal oxides provide superior UV protection by reflecting physically the light and eliminating the unsightly white residues. The inclusion of nanomaterials in day care products (especially facial cosmetics, i.e., creams) has prompted concern regarding the systemic absorption of these particles. An extensive discussion is presented regarding this issue. Nanoencapsulation of traditional organic UV filters is a more recent technological approach to improving the skin preservation, photostability and UV blocking ability of the free radicals/species. Especially, nanostructured polymers and solid lipid carriers (SLC) are interesting carriers for organic filters in sunscreens. Nanoencapsulation enhances the retention of organic sunscreens in the upper layers of the skin and alters the penetration and release profiles of the active molecule according to the novel design and material of the nanoparticle.

Application of mesoporous materials to hydrogenation and Bayer Villiger oxidation of citral

E of appropriate driving force is essential to study the mass transfer processes. The gas hydrate formation can be considered a mass transfer process and several models have been proposed to study the kinetics of this phenomena. In this paper, the mass transfer approach has been selected to study the kinetics of multicomponent gas hydrate formation. Four scenarios have been assumed and finally it was concluded that the driving force is the difference between chemical potential of operating pressure and equilibrium pressure at corresponding same temperature. A new general mass transfer coefficient has been introduced which is independent of composition. Results showed that general mass transfer coefficient can be used for a variety of composition at the same temperature and composition.A we all know, chitosan which is one of the most abundant natural amino polysaccharide has many special properties, such as biodegradability, nontoxicity, renewability and antibacteriality and so on. However, its low solubility in water restricts the application in wood, food and other industries. To improve the water solubility of chitosan, the carboxymethyl group was introduced. Acid red GR is commonly used in wood dyeing for its bright colors and easily penetrating in wood fiber. However, the small dye molecules run off easily from wood which is love by bacterial. Hence, a newly synthesized biopolymer dye with acid dye and anti-bacterial chitosan would have a huge market and broad prospects in wood industry for special situation like hospital, etc. Therefore, a new and novel antimicrobial biopolymer dye was synthesized by reaction of o-carboxymethyl chitosan and acid red GR. The synthesized products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric (TGA), solubility test and antimicrobial test. Results show that the antimicrobial biopolymer dye was combined by NH3+ of chitosan and sulfonic group of acid red GR under acidic conditions. Water solubility of chitosan biopolymer dye was increased. Moreover, the antibacterial property of the new synthesized dye was excellent, whose antibacterial rates of S. aureus and E. coil were both bigger than 99%. These results may provide new perspectives on improving the decorative properties and antimicrobial properties in wood industry.T Chemistry is the field of solving the complex mathematical equations of the quantum mechanical methods with computers. It is an old and young topic at the same time, old for the history of the methods representing the principles of this field and young as it is connected with the fast developments in computer hard and software. Currently, computational chemistry has become an essential tool to study and explain problems in most of chemistry branches. Interestingly, computational chemistry has gone beyond being a complementary tool for experimental results. In order to save time, efforts and money, chemists need to run computational calculations before dissolving chemicals in solvents and installing reflux and condenser. In industry, computational chemistry has become an important unit to develop new products and to save the expensive cost of try and error. During my talk I am going to focus on the importance of computational chemistry in industry and the new applications of computational chemistry in the field of astrophysics, biology, drug design and nanotechnology.In this research we report the comparative energy content or heat value of alcohol fuels as well as blends with gasoline obtained from both steel and bomb calorimeters. The energy content of the alcohol obtained from the two calorimeters differ widely, with the values of the energies obtained from the steel calorimeter far less than the values obtained from the bomb calorimeter. We observed that the energy content of the alcohol fuels increased from methanol through to pentanol. Meanwhile, the energy of the blend increases with the increase in carbon content of the alcohol, except for blends beyond E15. Additionally, the blend of the fuels gave higher energy values than the pure alcohols using any of the methods.E of appropriate driving force is essential to study the mass transfer processes. The gas hydrate formation can be considered a mass transfer process and several models have been proposed to study the kinetics of this phenomena. In this paper, the mass transfer approach has been selected to study the kinetics of multicomponent gas hydrate formation. Four scenarios have been assumed and finally it was concluded that the driving force is the difference between chemical potential of operating pressure and equilibrium pressure at corresponding same temperature. A new general mass transfer coefficient has been introduced which is independent of composition. Results showed that general mass transfer coefficient can be used for a variety of composition at the same temperature and composition.P (PMT) and Polyaniline (PANI) prepared by McDiarmid method, after doping with different dopants (salts of transition metals like copper, Brown-red complex of copper with 2,9-dimethylphenanthroline [Cu (DMPhen)2] ClO4.) become conductor, which are otherwise insulators. The brown-red complex was dissolved in 1:1 ratio of water and Tetra Hydro Furan (THF). PMT and PANI were separately dissolved in THF and doped with the complex in different ratio of 2%, 4% and 6%. Structural characterization of PMT and PANI prepared after doping of with different dopants have been studied at different concentration of dopant. FTIR, Scanning Electron Microscopy (SEM) and X-ray Diffraction were used for structural characterization of the prepared doped PMT and PANI. These types of measurements of doped polymetatoluidine and polyaniline systems will be helpful for the development of conducting polymeric materials. DC conductivity also proves the formation of conducting materials after doping.