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often the gene sequences placed on microarray slides are of unknown function suppose that an experiment identifies such
the process described by the michaelis-menten equation can be represented by a series of first-order differential
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suppose that you start with 103 g of a pure radioactive substance and 2 h later determine that only 025 103 g of the
the half-life of a radioactive sample is 30 min if you start with a sample containing 3 1016 nuclei how many of these
carbon 14 14 6 c is a radioactive isotope of carbon that has a half-life of 5730 years if an initial sample contained
a 50-g sample of carbon is taken from the pelvis bone of a skeleton and is found to have a 14c decay rate of 200
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emergent behavior is present in normal cellular and pathologic processes how does emergent behavior lead to
cell division models have demonstrated cellular protein oscillations which proteins are included in the models what
the nf-kb signal pathway is active in inflammation several models of the pathway have been developed hoffmann et al
ultrasound is not used to image bone directlya to estimate the strength of the reflection determine the normal
derive the normal reflection and transmission factors in terms of intensity rather than amplitude determine the normal
in a photomultiplier tube assume that there are seven diodes with potentials 100 200 300 400 500 600 and 700 v the
one method of treating cancer of the thyroid is to insert a small radioactive source directly into the tumor the
of the three basic types of radioaction-alpha beta and gamma-which has the greatest penetration into tissue explain the
a freshly prepared sample of a certain radioactive isotope has an activity of 10 mci after 4 h the activity is 8 mcia
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use diffusion theory to estimate light penetration in biological tissues a 10-mw isotropic point source is buried in an
consider skin tissue that is exposed to linear heating for example as in pulsed laser coagulation such that t to mt
assume you want to measure glucose through the anterior chamber of the eye as a means of noninvasively quantifying