Lange test

Lange test

(lahng'ĕ),
an obsolete, nonspecific test for altered proteins in spinal fluid. As originally used by Lange in 1912, the test was thought to be specific for neurosyphilis; however, this proved to be incorrect. Dilutions of spinal fluid are made in saline and to these a colloidal gold solution is added; if altered proteins are present, there is a color change or precipitate formed.

Lange test

(lang′ĕ)
[Carl Lange, Ger. physician, 1883–1953]
An obsolete test for diagnosis of cerebrospinal syphilis by the degree of gold precipitation in varying concentrations of colloidal gold solution and spinal fluid.

Lange,

Carl F.A., German biochemist, 1883-1953.
Lange solution - a colloidal gold solution used to demonstrate protein abnormalities in spinal fluid.
Lange test - an obsolete, nonspecific test for altered proteins in spinal fluid. Synonym(s): gold sol test; Zsigmondy test
References in periodicals archive ?
(47) Two considered that the law burdened the freedom of political communication but was justified on the second limb of the modified Lange test, essentially to prevent abuse of the electoral system by registering 'sham' parties.
(64) Whether there would be an element of 'strict scrutiny' in such a case, or how the second limb of the Lange test would be applied, is unclear.
Consider the Lange test as modified in Coleman and summarised by six judges in Hinch.
In response, the High Court adopted McHugh J's modification to the Lange test in Coleman, to examine not only the ends to which regulation is directed, but also of the means employed.
This second dimension of the Lange test's second limb is vitally important when we re-consider ACTV in the light of the Lange analysis.
Nor will this article consider the nature and application of the Lange test for constitutionality or engage in debate as to the merits or otherwise of the constitutional reasoning from which the implied freedom was derived.
(13) She illustrates her point in relation to the standards of review that the Court must at some point choose to employ when applying the Lange test. Namely, should it favour a proportionality test or something more akin to the American notion of strict scrutiny?
(10) The other key unresolved question is how the Lange test for constitutionality will be applied.