While you develop callused feet when you go barefoot for a summer, your neighbor remains a tenderfoot by protecting her feet with shoes. the differences in skin toughness between you and your neighbor are best attributed to?

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.