Use a car seat with a harness for as long as possible, and keep it rear-facing for as long as possible (until your child reaches the manufacturer's height or weight limit). Keep your older child in a booster seat until at least 8 years of age and 57 inches tall. Have your child ride in a rear seat until age 13.
Flame atomic absorption spectroscopy instrument. Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state.
An AA degree is an Associate of Arts degree, while an AAS is an Associate of Applied Science degree. There are many types of associate degrees. The basic breakdown categories are Associate of Art (AA) and Associate of Science (AS) degrees. Within each of these two categories are subcategories, and the Associate of Applied Science is a subcategory of the AS degree. This is a fundamental difference between the two degrees, with the AA directed toward arts education and the AAS directed toward science education.