T1
In magnetic resonance, the time for 63% of longitudinal relaxation to occur; the value is a function of magnetic field strength and the chemical environment of the hydrogen nucleus; for protons in fat and in water, in a 1.5T magnet, about 250 msec and 3000 msec respectively. A t1-weighted image will have a bright fat signal.
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
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Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..