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 ?
A little bit of urushiol goes a long way; enough to coat the head of a pin can have up to 500 people scratching in misery.
Symptoms usually occur within the first 4 days of exposure, with lesions cropping up at different times depending on the location and type of skin and intensity of exposure to urushiol.
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.
As soon as possible after contact, pour vodka on the skin to wash away the urushiol oil which causes major itching.
But unlike other sunscreens, Sun & Ivy offers the added benefit of protecting against urushiol, the sap in poison ivy, oak and sumac.
Poison ivy contains a sticky oil called urushiol (yoo-ROO-she-ol).
Compuestos toxicos: Acido anacardico y aceites esenciales ricos en fenoles monohidroxilados como el cardol (anacardiol) y el urushiol, que funcionan como haptenos.
Effect on Plant Compound Plant part livestock Cocklebur Hydroquinone Seeds and Nausea, poor herbage gain Lambsquarters Nitrates Herbage Respiratory failure, death Halogeton Oxalates Herbage Kidney failure Horary Unknown Herbage Fever, founder alyssum in horses Nightshade Alkaloid Herbage and Diarrhea green berries Poison ivy Urushiol Herbage and Dermatitis roots Water Cicutoxin Roots and Death hemlock herbage White snake Retinol Herbage Kidney failure root Table 14-7 Examples of human poisonings through ingestion or inhalation of toxins from weeds.
Poison plant rashes can't be spread from person to person, but it's possible to pick up a rash from urushiol that sticks to clothing, tools, balls and pets.
A study in mice now shows that mast cells produce a helpful immune protein a few days after skin contact with urushiol, the key culprit in poison ivy and its partners in skin crime, poison oak and poison sumac.