For example, restriction of the essential amino acid, methionine, can improve health and increase longevity in mice and rats, although importantly too much restriction can compromise health as well.
Examples: discussion of the essential role of living things in the transition of the earth's atmosphere from reducing to oxidizing and the consequences of this for the evolution of life; the use of radioactive dating in geology and biology; the presence of iridium at the K-T boundary.
His homage to Joseph Cornell, for example, takes the essential components of one of Cornell's enigmatic boxes – weathered wood, a plain white watch face, found bric-a-brac, a print of a cockatoo – and produces his own version.
The next example indicates the essential role of the upper semicontinuity assumption for the set (K_{2}) in Theorem 4.2.
Love, respect, and compassion, for example, are the essential emotional ingredients of interpersonal relations and concerns.
One of the first examples demonstrating the essential nature of proper cell cell contacts involved the perturbation of cadherin function.
Allowing groups of countries to make sectoral deals, for example, could undermine one of the essential ingredients of a trade round: the ability to trade concessions in one sector for gains in another.
Termites and the protists that reside in their hindguts are a classic example of symbiosis, and the essential steps of lignocellulose degradation that is handled by symbiotic protists allow the host termites to thrive on a wood diet.
"Never in the 60-year history of the court has there been an example of the court killing an essential piece of government policy".
