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.
biotechnologies. 1  1: the manipulation (as through genetic engineering) of living organisms or their components to produce useful usually commercial products (as novel pharmaceuticals); also : any of various applications of biological science used in such manipulation. 2  2: ergonomics.