Celil Atik

Fungal growth inhibition by wood extracts from Juniperus foetidissima and J. oxycedrus

SubjectSap- and heartwood extracts obtained by successive extractions with cyclohexane, chloroform, ethanol and hot water from J. foetidissima and J. oxycedrus were tested for their antifungal activity by using the agar plate method. Generally, the extractive substances of heartwoods soluble in nonpolar or slightly polar solvents show higher activities, whereas the extract fractions with higher polarity also seem to possess notable inhibition in case of sapwoods.

The impact of zeolite filler on ageing and mechanical failure of paper

Abstract The choice of the filler type for paper materials has been a qualitative discussion. The mineral precipitated calcium carbonate (PCC) is used in considerable quantities in the pulp and paper industry as filler. However, alternative filler materials have been researched for improving the properties of paper. In this work, a domestic zeolite (clinoptilolite) filler was used separately and mixed with precipitated calcium carbonate (PCC) fillers. Indeed, the objective of our approach was to explore the structural and mechanical properties of handsheets having filler content affected as a function of accelerated ageing. The results confirmed that the mixed furnish of zeolite and PCC fillers provides positive and synergistic effect on the mechanical properties of ageing handsheets at the low content.