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.
Chromatography columns are used to separate mixtures. In any chromatography technique, there is a stationary phase that is usually solid or liquid and a mobile phase usually liquid or gas, that moves through it. The type of chromatography is determined by the type of mobile phase present in the system. The major types of chromatography column include Gas Chromatography (GC), High Performance Liquid Chromatography (HPLC), and Thin Layer Chromatography (TLC). These are described below.