To solve the problem, we need to determine the half-life of a radioactive sample given that its activity drops to one-third of its initial value in 80 minutes. We can use the relationship between activity, time, and half-life in radioactive decay.
Localization of functional activity in the central nervous system by measurement of glucose utilization with radioactive deoxyglucose. J. Cereb. Blood Flow Metab. 1, 7–36 (1981). PubMed CAS Google Scholar Wang, Z., Pang, R. D., Hernandez, M., Ocampo, M. A. & Holschneider, D. P...
16 Because the most dominant neutralizing antibody responses target RBD, this plasma sample was tested for the presence of anti-RBD antibodies by ELISA.15 In line with its neutralization activity, we found that this patient had high levels of anti-RBD IgG as compared with adult neutralizers (...
Cell proliferation was determined using the CellTiter 96® Non-Radioactive Cell Proliferation Assay (MTT) kit (Promega) essentially as described by the manufacturer. PC-3M (300 cells/well), LNCaP (2500 cells/well), LNCaP-abl (5000 cells/well), LNCaP-abl-EnzaR (2500 cells/well), 22Rv1 ...
To limit the probability of a Type I error in which no radioactivity is perceived to be radioactive and the probability of a Type II error in which there is radioactivity but we cannot tell that it is radioactive, there is a minimum value for the expected value of the net count in the...
The oxidative distillation method was used to pretreat the urine samples, and the activity concentration of tritium in distillate was then measured using liquid scintillation counter. The formula for the committed effective dose was also applied used to estimate the internal doses. The highest tritium...
Telomerase activity was calculated according to the following formula: TPG ¼ [(X À B)/(C À B)]:[(r À B)/Cr  100], where TPG is the total product generated, X signifies each sample signal, C represents the 36 bp internal PCR control, r is the TSR8 quantification ...
In a liquid scintillation counter the light output from a liquid scintillation sample containing radioactive isotopes of unknown activity is measured by means of a detector. A pulse height analyzer ha
Hybridization may be detected by labeling the probe with a detectable agent such as a radioactive isotope, a fluorescent dye or an enzyme capable of catalyzing the formation of a detectable product. [0174] Many methods for using the labeled probes to detect the presence of complementary nucleic...
d) a radioactive nucleotide sugar, e) Scintillation Proximity Assay (SPA) beads, where said SPA beads are avidin or streptavidin coated, followed by measuring the radioactivity incorporated into said SPA beads. 2. An assay of claim 1, where, R1 -R4 are independent and are selected from...