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Properties of Cellulose Sheets Modified with Potassium-Humate and Copper (II)-Sulfate
276-285Views:104Throughout our research we have made potassium-humate from brown coal of Dudar. With potassiumhumate and copper(II)-sulfate we made test sheets of linter cellulose fibers. The surface energy, surface wettability, CIE Lab color-coordinates changing, bending resistance and tensile strength of the produced test sheets has been examined. There was no big difference in the different samples during surface energy and wettability testing. Examination of mechanical properties suggests that potassium-humate content increases bending resistance of the test sheets. The bending resistance of samples increased by 32%, 100% and 336% compared to the control test sheets while adding potassium-humate.
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International Experiences of Introducing Dual Training Based on Examples from Some Countries
Views:167In Hungary, dual training was introduced in 2015. Dual training is a response to the needs of the labour market and has become increasingly popular since its introduction. Dual training is also playing an increasingly important role in higher educationin many countries, helping to modernise education, the knowledge transferred and fostering stronger links between companies and universities. The aim of this article is to present the dual training system and the international experience gained over time, drawing on the literature available on the subject.