[tag=VB] [!lemma=nerve] [lemma=cell] [tag=VBD] □
[tag=VB] [!lemma=nerve] [lemma=cell] [tag=VBD] [□]
[tag=VB] [!lemma=nerve] [lemma=cell] [tag=VBD] □+
You had to work through trusted leaders , that is to say every cell had to have someone whom you knew was loved and trusted by the people he was working with and you had to work through him or her and they had to accept your basic principles of security , which meant a whole lot of things including not using the telephone , not going into black cafes and eating huge black-market meals and that kind of thing . Working with visiting graduate student Fabrizio Gelain from Milan , Zhang created a designer scaffold from a network of protein nanofibers , each 5,000 times thinner than a human hair and containing pores up to 20,000 times smaller than the eye of a needle.The researchers were able to grow a healthy colony of adult mouse stem cells on the three-dimensional scaffold without the drawbacks of two-dimensional systems.In addition to helping researchers get a more accurate picture of how cells grow and behave in the body , the new synthetic structure can provide a more conducive microenvironment for tissue cell cultures and tissues used in regenerative medicine , such as skin grafts or neurons to replace brain cells lost to injury or disease.The scaffold itself can be transplanted directly into the body with no ill effects . Scientists are taking the first major step in using stem cells to replace retinal cells lost to degenerative eye diseases such as macular degeneration and retinitis pigmentosa . In addition to helping researchers get a more accurate picture of how cells grow and behave in the body , the new synthetic structure can provide a more conducive microenvironment for tissue cell cultures and tissues used in regenerative medicine , such as skin grafts or neurons to replace brain cells lost to injury or disease . In fact , given Osama 's antagonism towards secular regimes in general , these may have been cells intended to work against Sadaam .