Search results
Results from the WOW.Com Content Network
Zearalenone is a white crystalline solid, with molecular formula C 18 H 22 O 5 and 318.364 g/mol molecular weight. It is a resorcyclic acid lactone.It exhibits blue-green fluorescence when excited by long wavelength ultraviolet (UV) light (360 nm) and a more intense green fluorescence when excited with short wavelength UV light (260 nm). [4]
Vomitoxin, also known as deoxynivalenol (DON), is a type B trichothecene, an epoxy-sesquiterpenoid. This mycotoxin occurs predominantly in grains such as wheat , barley , oats , rye , and corn , and less often in rice , sorghum , and triticale .
An important aspect of the Western Electric rules are the zone rules, designed to detect process instability, and the presence of assignable causes. [5] Data sets of observations are appraised by four basic rules, that categorize the occurrence of data samples in a set of zones defined by multiples of the standard deviation.
Examples include high levels of syphilis antibodies in HIV patients or high levels of cryptococcal antigen leading to false negative tests in undiluted samples. [7] [8] This phenomenon is also seen in serological tests for Brucellosis. [citation needed] It may be seen in precipitation reactions.
The individual's pre-test probability was more than twice the one of the population sample, although the individual's post-test probability was less than twice the one of the population sample (which is estimated by the positive predictive value of the test of 10%), opposite to what would result by a less accurate method of simply multiplying ...
Pre-test probability: For example, if about 2 out of every 5 patients with abdominal distension have ascites, then the pretest probability is 40%. Likelihood Ratio: An example "test" is that the physical exam finding of bulging flanks has a positive likelihood ratio of 2.0 for ascites.
Don't read the test too early or too late, the experts say, because that may give you a false-negative or false-positive result. Only read your results within the time window that the COVID-19 ...
Reagent test Alcohols: Forms Lucas test in alcohols is a test to differentiate between primary, secondary, and tertiary alcohols. Alkaloids: Forms Froehde Liebermann Mandelin Marquis Mayer's Mecke Simon's: Amines, and amino acids: Forms Folin's: Barbiturates: Class Dille–Koppanyi Zwikker: Benzodiazepines: Class Zimmermann: Phytocannabinoids ...