scratch test


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scratch test

 [skrach]
a skin test for hypersensitivity in which a minute amount of the substance in question is inserted in small scratches made in the skin. A positive reaction is swelling and reddening at the site within 30 minutes. It is used in allergy testing and in testing for tuberculosis (pirquet's reaction).
Scratch test.

scratch test

a form of skin test in which antigen is applied through a scratch in the skin.

scratch test

n.
A test for allergy performed by scratching the skin and applying an allergen to the wound.

scratch test

Etymology: ME, scratten + L, testum, crucible
a skin test for identifying an allergen, performed by placing a small quantity of a solution containing a suspected allergen on a lightly scratched area of the skin. If a wheal forms within 15 minutes, allergy to the substance is indicated. Compare patch test.

scratch test

(skrach test)
A form of skin test in which antigen is applied through a scratch in the skin.

scratch test

(skrach test)
A form of skin test in which antigen is applied through a scratch in the skin.

scratch test,

n a skin test for identifying an allergen, performed by placing a small quantity of a solution containing a suspected allergen on a lightly scratched area of the skin. If a wheal forms within 15 minutes, allergy to the substance is indicated.

scratch test

a test for hypersensitivity in which a minute amount of the substance in question is inserted in small scratches made in the skin. A positive reaction is swelling and reddening at the site within 30 minutes. Used in allergy testing and in testing for tuberculosis. In animals, intradermal testing is used more commonly. See also skin test.
References in periodicals archive ?
Further attempts at quantifying the scratch test have been reviewed by Bull (26) who examined the scratch test as applied to a number of qualitatively different coating substrate systems.
The linear load range for the scratch test was set at 1-15N.
Scratch tests were carried out according to ASTM D7027-0511S0 19252:08 (11) standard by using a linearly progressive normal load of 1-70 N.
The panels were fastened together for the scratch test to ensure that both were subjected to the same steel wool pad and same conditions.
Second, the results of the test can be immediately appreciated by the automotive and coating industries where real-life surface damage occurs at a similar length scale as those generated by way of the ASTM/ISO scratch tests.
Linear scratch tests with progressively increasing load were conducted for evaluation of the coating adhesion and scratch toughness properties.
Samples for scratch test were prepared by compression molding at 250[degrees]C at 17.
Figure 4a-c shows the spectra obtained during the scratch test of the produced multilayered coatings.
The LCD scratch test ensures no scratches are left on the screen's protection shield, and a ripple test ensures that the screen can endure a definite amount of stylus pressure.