Persistent behavior problems canaffect educational attainment, proper social development,employment, and the likelihood of criminality.The causes of childrenâs mental health problems arevaried and complex and include genetic makeup, childpoverty, maternal depression, and poor or abusivecare.
Paper chromatography is a technique for separating and identifying mixtures that are (or can be) coloured. It has been largely replaced by thin layer chromatography, but is still a powerful teaching tool. Double-way paper chromatography, also called 'two-dimensional chromatography', uses two solvents and rotates the paper 90Â° in between.
Filmoplast FilmoplastÂ® P - for mending paper. A highly transparent mending tape suitable for invisible dry mending of tears in documents, pages, maps etc. Made of very thin, acid-free tissue coated with a self-adhesive. Tested by the Federal Institute for Materials Testing who reported a pH of 8.8 on unaged tape and 8.1 on aged material.