Kazimierz Wielki University in Bydgoszcz

About: Kazimierz Wielki University in Bydgoszcz is a education organization based out in Bydgoszcz, Poland. It is known for research contribution in the topics: Luminescence & Population. The organization has 1109 authors who have published 2923 publications receiving 19548 citations. The organization is also known as: Casimir the Great University & Uniwersytet Kazimierza Wielkiego w Bydgoszczy.

Simulation of the regularities of physical exercises learning process of boys aged 8 years old

Abstract: Purpose: to determine the peculiarities of the formation of motor skills in boys aged 8 years. Materials and methods: In study participated boys of eight years old (n=48). The study used factor experiment plans. The purpose of this experiment was to optimize the modes of education and to determine the peculiarities of the formation of motor skills in boys. Results: Discriminant analysis allowed: to determine the modes of exercise in the formation of motor skills; to answer the question as to how significantly different modes of work on the effectiveness of the formation of motor skills. Established: which of the variables most significantly affect the differentiation of classes; to which class the object belongs based on the values discriminant variables. The influence of the number of approaches, the number of repetitions in the approach and the interval of rest on the level of training for movements is revealed. Conclusions: To choose the most rational mode of exercising in the process of forming motor skills can be used the first discriminating function with an emphasis on the most informative variables.

Effects of coffee on the stability of accelerated aged poly(acrylonitryle‐butadiene‐styrene)

Abstract: In food chemistry coffee is nowadays accepted as a rich source of compounds possessing antioxidant and radical scavenging activities. The aim of this work was to assess the influence of coffee on degradation properties of poly(acrylonitryle-butadiene-styrene) (ABS). Content of instant extract coffee powder varied from 0.1 to 0.5 wt %. The injection moulded samples were accelerated aged by means of heat treatment, UV-Vis irradiation, and immersion in salt water. The influence of coffee on ABS properties were characterized by oxidation induction time (isothermal OIT), oxidation induction temperature (dynamic OIT), Fourier transform-infrared spectroscopy (FT-IR), UV-Vis spectroscopy, differential scanning calorimetry (DSC), thermogravimetry (TG), and dynamic mechanical analysis (DMA). It was found that coffee effectively acted as an antioxidant, color, and structure stabilizer, maintaining mechanical properties close to the nonaged as compared with aged ABS. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39887.