This historic test consisted, in its first step, of taking an oral dose of radiolabelled vitamin B 12, followed by quantitation of the vitamin in the patient's urine over a 24-hour period via measurement of the radioactivity.
32.
The SN test is occasionally used for detection and quantitation of humoral antibody for PPV . Neutralization of infectivity is usually confirmed by the absence or reduction either of intranuclear inclusions or fluorescent cells in cultures or of viral hemagglutinin in the culture medium.
33.
With the combined capabilities of " top-down " and " bottom-up " approaches, proteomics can pursue inquiries ranging from quantitation of gene expression between growth conditions ( whether nutritional, spatial, temporal, or chemical ) to protein structural information.
34.
AMS service is now more accessible for biochemical quantitation from several private companies and non-commercial access to AMS is available at the National Institutes of Health ( NIH ) Research Resource at Lawrence Livermore National Laboratory, or through the development of smaller affordable spectrometers.
35.
The qualitative " reading " usually based on detection of intensity of transmitted light by spectrophotometry, which involves quantitation of transmission of some specific wavelength of light through the liquid ( as well as the transparent bottom of the well in the multiple-well plate format ).
36.
To evaluate peripheral lymphocyte function, T and B cell quantitation and in vitro responses to three nonspecific mitogens were studied in 34 persons with highest PBB levels ( mean : 787 ppb ), and in 56 with low levels ( mean : 2.8 ppb ).
37.
Quantitation is made in reference to a methylated reference DNA . A modification to this protocol to increase the specificity of the PCR for successfully bisulfite-converted DNA ( ConLight-MSP ) uses an additional probe to bisulfite-unconverted DNA to quantify this non-specific amplification.
38.
The " isolation " of a natural product refers, depending on context, either to the isolation of sufficient quantities of pure chemical matter for chemical structure elucidation, derivitzation / degradation chemistry, biological testing, and other research needs ( generally milligrams to grams, but historically, often more ), or to the isolation of " analytical quantities " of the substance of interest, where the focus is on identification and quantitation of the substance ( e . g . in biological tissue or fluid ), and where the quantity isolated depends on the analytical method applied ( but is generally always sub-microgram in scale ).
