Search results for "Industrial chemistry"
showing 10 items of 19 documents
Comparative Study of Liposoluble Vitamins and Fatty Acids from Sea Buckthorn Oil, Wheat Germ Oil and Fish Oil
2018
Abstract An important role in human nutrition is played by fats, both of plant and animal origin. Fats are a category of foods rich in liposoluble vitamins and fatty acids. They are widely used in nutrition, in cosmetics, in the content of creams as well as in pharmaceutical products, in the form of dietary supplements, such as capsules with oils rich in fatty acids and the addition of liposoluble vitamins. The objective of this paper was to study the content in vitamins and fatty oils of two vegetable oils (wheat germ and sea buckthorn oils) and an animal oil (fish oil). The results show that these oils are rich in liposoluble vitamins, omega-3 fatty acids and omega-6 fatty acids. Hence, t…
Activity of phthalocyanine-sensitized TiO2-anatase in photooxidation of sulfite ions
2015
Abstract Hybrid catalysts based on the TiO2 matrix impregnated with Nd, Eu and Yb diphthalocyanines proved effective in oxidation of sulfite ions under irradiation with light from the UV-visible range. Micro- and nano-crystalline anatase powders were used in preparation of the photocatalysts, which were applied in the form of a suspension in the water phase. The reaction yield was found to depend on the phthalocyanine sensitizer used and the conditions of TiO2 impregnation. The best results were obtained when micro-anatase impregnated with Yb-diphthalocyanine was used.
Biosorption lead(II) and nikel(II) from an aqueous solution by bacterial biomass
2010
Biosorption lead(II) and nikel(II) from an aqueous solution by bacterial biomass The optimum conditions for biosorption of Pb(II) and Ni(II) from aqueous solution were investigated, by using living and nonliving Pseudomonas fluorescens and Bacillus pumilus isolated from wastewater treatment plant. It was found that the optimum pH for Pb(II) removal by living and nonliving cells was 6.0, while 7.0 for Ni(II) removal. At the optimal conditions, metal ion biosorption was increased as the initial metal concentration increased. The binding capacity by living cells is significantly higher than that of nonliving cells at tested conditions. The maximum biosorption capacities for lead and nickel by …
Comparative Analyses for Gluten-Free Biscuits from Mixture Oat and Corn
2018
Abstract Gluten-free products are necessary for the people suffering from celiac disease or having a sensibility for products containing gluten. The aim of this study was to prepare and evaluate gluten free biscuits made from a mixture of flours (50% corn flour and 50% oat flour) with various fats (palm fat, coconut oil) and sweeteners (sugar, stevioside with erythritol). Sample biscuits were made and then analyzed to find out the moisture, water activity, braking point, specific volume and sensory evaluation. All samples had the moisture close to 5-6%. Water activity ranged from 0.49 to 0.71. The breaking point was higher for sample prepared with palm fat and sugar (0.43). This sample was …
Erratum to “A fuzzy logic approach to modeling a vehicle crash test” by W. Pawlus, H. Reza, K. G. Robbersmyr
2013
Abstract The original version of the article was published in Central European Journal of Engineering 3, 67–79 (2013), DOI: 10.2478/s13531-012-0032-2. Unfortunately, the original version of this article contains a mistake in Figure 17. Here we display the corrected version of this figure.
Relaxation of wet paper by simulations and laboratory-scale experiments
2009
Numerical studies of fiber networks and experiments on wet paper show that tensile force relaxes linearly as a function of logarithmic time. Relaxation rate is faster for wet than dry paper. Simulated permanent deformation after relaxation is clearly higher than that measured in wet paper.
Thermomechanical Phenomena in Extended Thermodynamics of an Ideal Monoatomic Superfluid
1992
Kinetic Analysis of Aluminium Evaporation from the Ti-6Al-7Nb Alloy
2014
Abstract In the present paper, kinetics of aluminium evaporation from the Ti-6Al-7Nb alloy during smelting by means of the VIM method at 5 to 1000 Pa has been discussed. To determine the liquid titanium meniscus area and the liquid titanium mean velocity for the experimental conditions of the study, a methodology based on the coupled model of the electromagnetic field and the hydrodynamic field of liquid metal was applied.
Hydrogen peroxide as a biodegradation stimulator in remediation processes of soils heavily contaminated with petrochemicals
2015
Abstract The soil contaminated with petroleum products must be excluded from the crops and treated to reclamation processes. Natural processes of decomposition of hydrocarbon compounds go very slow, so it is necessary to use bioaugumentation or stimulation in order to accelerate the return of the soil to high culture. In this study the effect of hydrogen peroxide on the process of cleaning soil strongly contaminated with pertochemicals was investigated. For this purpose, a pot experiment lasting 60 days was carried. The dynamics of changes in the population of filamentous fungi, yeasts and bacteria were examined and also content of aliphatic hydrocarbons (n-alkanes), monoaromatic and polycy…