Seniors and Depression: The difference between depression and dementia. Depression is a mood disorder; dementias like Alzheimerâs disease, can have similar symptoms but they are different illnesses and have different treatment plans.
From a synthesis standpoint, nanotechnologies can be classified as variations of bottom-up technologies, such as self-assembly, or top-down technologies, such as lithographic methods (Box 1). Many nanotechnologies combine aspects of both strategies.
1 An example of technology is ultra sound, MRI, CAT scans and other forms of nuclear imaging, which allow doctors to see inside the human body using a blending of medical technology, nuclear technology and computer technology.