urushiol


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urushiol

 [u-roo´she-ol]
the toxic irritant principle of poison ivy and related plants.

u·ru·shi·ol

(ū-rū'shē-ōl),
A mixture of nonvolatile hydrocarbons, derivatives of catechol with unsaturated C15 or C17 side chains, constituting the active allergen of the irritant oil of poison ivy, Toxicodendron radicans, poison oak, T. diversilobum, and the Asiatic laquer tree, T. verniciferum.
[Jap. urushi, lac, + L. oleum, oil]

urushiol

/uru·shi·ol/ (u-roo´she-ol) the toxic irritant principle of poison ivy and various related plants.

urushiol

(o͝o-ro͞o′shē-ôl′, -ōl′, -ŏl′)
n.
A toxic substance composed of catechol derivatives that is present in the sap of various plants of the family Anacardiaceae and especially the genus Toxicodendron, including poison ivy, poison sumac, and the lacquer tree, from which a durable lacquer is obtained.

urushiol

[əro̅o̅′shē·ôl]
a toxic resin in the sap of certain plants of the genus Rhus, such as poison ivy, poison oak, and poison sumac, that produces allergic contact dermatitis in many people.

ur·u·shi·ol

(ū-rū'shē-ōl)
A mixture of nonvolatile hydrocarbons, constituting the active allergen of the irritant oil of poison ivy, Toxicodendron radicans, poison oak, T. diversilobum, and the Asiatic laquer tree, T. verniciferum.
[Jap. urushi, lac, + L. oleum, oil]

urushiol

the toxic irritant principle of poison ivy and various related plants.
References in periodicals archive ?
Approximately 50% to 75% of people are susceptible to contact dermatitis due to urushiol oil, and will develop an allergic reaction when adequately exposed to plants containing it.
It is not just the leaves that can provoke a reaction; the stems, roots, flowers and berries all contain urushiol.
Cytotoxicity of urushiols isolated from sap of Korean lacquer tree (Rhusverniciflua Stokes).
When a poison ivy plant is injured in any way, the urushiol is released quickly and can stick to anything around it," said Dr.
This will lessen the amount of urushiol that may get on your skin.
Grimbaldeston decided to gauge the animals' responses to urushiol several days later.
2] vines, about 20 percent of the urushiol was in chemically unsaturated forms, versus 15 percent unsaturated for normal vines.
The kit includes the Poison Ivy Care Removal Scrub, which contains a combination of ingredients that bind to urushiol, the toxin found in poisonous plants, allowing it to be washed away.
Poison ivy has in its leaves a chemical, called urushiol, which is a contact poison.
The offending substance in the plant is called urushiol, one of the most toxic substances on earth.
Technically, poison ivy plants are coated and filled with a sap-like oil called urushiol which, though NOT poisonous, does cause a fierce allergic reaction in most people.
The urushiol oil that causes the painful itchy misery can be removed if you wipe it down with a hand washing towelette within the first half-hour of exposure.