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.
Confidence votes 160. It is the separation of two or more substances in a solvent. Chromatography is a separation technique based on the different interactions of the compounds with the two phases, a mobile phase and a stationary phase, as the compounds travel through the supporting medium.The mobile phase is the ink spot, as it travels up the piece of paper (in paper chromatography).hromatography is an analytical method to separate the compounds from the two immiscible phases,one being a mobile phase and another being a stationary phase. It is used in pe â¦ troleum industry,pharmaceutical industry.