The principle of natural selection, thus formulated, has the... HJ Hamilton - 《Zygon®》 被引量: 24发表: 1977年 A four elements porous model to estimate the strength of unsaturated soils One of the most prevalent relationships for effective stresses on unsaturated soils was proposed by ...
A Breencast is a regular broadcast made by Dr. Wallace Breen, delivered to the populace of City 17 (and possibly other Combine controlled towns and cities) via private televisions and, more commonly, large video monitors mounted on walls in public places
Using a technique known ascarbon dating, it’s possible to estimate the age of an organic compound. While a plant or animal is alive, the carbon in the living organism is constantly renewed, and the ratio of carbon-12 to carbon-14 remains constant. This process of renewal stops when the...
Figure 1. Radioactive decay reduces the number of radioactive nuclei over time. In one half-lifet1/2, the number decreases to half of its original value. Half of what remains decay in the next half-life, and half of those in the next, and so on. This is an exponential decay, as s...
of the bioavailable dose to be eliminated from the body. The half-life is useful to estimate the dosing interval, the duration of action of a drug, and the time required to attain steady-state plasma concentrations during a multiple dosage regimen. The volume of distribution and clearance of ...
The share of journals with such values can reach for a few dozens of percent in some years. We designed some strategies to overcome this limitation and estimate the the dynamics of half-life indicators of journals by subject categories of Web of Science, which is important for the proper use...
We have the following: each half-life is {eq}A_o = 6.93\ \text{days} {/eq} Now, let's investigate the number of half lives required {eq}\begin{ali...Become a member and unlock all Study Answers Start today. Try it now ...
Recoveries were calculated from the highest FVII activity of the first four blood samples drawn after infusion. The two-phase linear regression method was used to estimate the half-life according to the two-compartment model. In addition, a noncompartmental approach was applied. The mean recovery...
g = 8.75 g q9. after 24.0 days, 2.00 milligrams of an original 128.0 milligram sample remain. what is the half-life of the sample? answer. the remaining decimal fraction is: 2.00 mg / 128.0 mg = 0.015625 the half-lives that must have expired to get to 0.015625? (½) n = 0.015625...
This work presents the first direct measurement of the 93Mo half-life. The measurement is a combination of high-resolution mass spectrometry for the determination of the 93Mo concentration and liquid scintillation counting for determining the specific ac