Text this: Microstructure: Surface and cross-sectional studies of hydroxyapatite formation on the surface of white Portland cement paste in vitro

 _    _      ___      _  __    ______    ______  
| \  / ||   / _ \\   | |/ //  /_   _//  /_   _// 
|  \/  ||  | / \ ||  | ' //    -| ||-     | ||   
| .  . ||  | \_/ ||  | . \\    _| ||_    _| ||   
|_|\/|_||   \___//   |_|\_\\  /_____//  /__//    
`-`  `-`    `---`    `-` --`  `-----`   `--`