AA

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Related to amino acid: essential amino acid

AA

The second-highest bond rating by S&P and Fitch. AA is subdivided (in decreasing order) into AA+, AA, and AA-. Bonds with AA ratings are investment-grade, meaning that banks are allowed to hold them. AA bonds are low-risk and low-return. The rating is equivalent to an Aa rating by Moody's.

AA

A grade assigned to a debt obligation by a rating agency to indicate a very strong capacity to pay interest and repay principal. Such a rating indicates only slightly lower quality than the top rating of AAA. Also called Aa.
References in periodicals archive ?
Both methods, as expected by definition, led to 10% of amino acid concentrations being higher than the 90th quantile value, and to 10% of concentrations being lower than the 10th quantile value.
A variation in analysis of the soil including organic carbon total nitrogen and total amino acids contents in the affected soil as compared to unaffected soil may reflect the extent of the contamination.
Kundu, "Hydrophobic, hydrophilic, and charged amino acid networks within protein," Biophysical Journal, vol.
The team says they believe the icy surfaces of the moons Enceladus and Europa, which orbit Saturn and Jupiter respectively, proved an ideal environment for the production of amino acids therefore life.
Amino acid score= Amount of amino acid per test protein [mg/g]/ Amount of amino acid per protein in reference protein [mg/g].
The extremely sensitive equipment in both labs detected small amounts of 19 different amino acids in the sample, ranging from 0.
After all, some of the odd forms of life that use a naturally occurring 21st amino acid, one-celled microorganisms belonging to the group Archaea, can exist at the extreme pressures and temperatures of hydrothermal vents on the deep ocean floor.
They believe taking the amino acids might be especially helpful for the elderly or ill, particularly people with heart failure, chronic lung disease, or other conditions characterised by flagging energy levels.
The other amino acid, which was produced in L-6 medium by majority of strains, was isoleucine (maximum 2.
As the primary amino acid released from muscle during starvation, alanine serves as an important substrate for hepatic gluconcogenesis.
The new plant, which has an annual amino acid production capacity of 2,500 tons, manufactures 12 different amino acids including arginine, histidine and serine for transfusions.