optical rotation

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(ro-ta'shon) [L. rotatio, a turning]
The process of turning on an axis.

external rotation

Restitution (3). See: Cardinal Movements at Birth - step 7

fetal rotation

Twisting of the fetal head as it follows the curves of the birth canal downward.

injection site rotation

Administration of parenteral medications such as insulin into a different part of the body each day to avoid local tissue trauma, atrophy, or lipodystrophies.

Patient care

Subcutaneous injections of insulin are typically rotated around the abdomen from the right upper quadrant, to the midepigastrium, left upper quadrant, left lower quadrant, hypogastrium, and right lower quadrant before returning to the right upper quadrant. A similar technique is used with low-molecular-weight heparins, colony-stimulating factors, and other drugs.

optical rotation

See: optical activity

tooth rotation

The repositioning of a tooth by turning it on its long axis to a more normal occlusal position.

optical rotation (pˑ·t·kl rō·tāˑ·shn),

n the angle by which plane-polarized light rotates when it passes through a substance that exhibits optical activity. This is a distinguishable quality of a particular compound. See also optical activity.
References in periodicals archive ?
The stereochemistry at various centers could be determined as 2S,3S,4R, due to the optical rotations of 1 ([a]D = + 19.
The OR-2090 optical rotation detector (ORD) is for a highly sensitive and universal HPLC detector of chiral compounds.
Isbell, Optical Rotation and Ring Structure in the Sugar Group, Research Paper 128, J.
Measuring changes in optical rotation between two states of a molecule is a promising alternative, since detecting the optical rotation doesn't cause any loss of information.
With our many in house quality assurance tools including mass spectrometry, gas chromatography, refractive index, specific gravity, optical rotation, flash points, head space analysis and a variety of wet analysis capabilities, we make every attempt to identify anomalies that would affect our customers' products.

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