orhalf′ life`, n.,pl.-lives(-ˌlaɪvz) 1.the time required for one half the atoms of a given amount of a radioactive substance to decay. 2.the time required for the activity of a substance taken into the body to lose one half its initial effectiveness. ...
1994. Metabolic fate and pharmacokinetics of the acyclovir prodrug ... PD Miranda,TC Burnette - 《Drug Metabolism & Disposition the Biological Fate of Chemicals》 被引量: 138发表: 1994年 Biological half-life of cadmium in the urine of inhabitants after cessation of cadmium exposure We ...
In this study, we have proposed QSPR models for the prediction of hydrolysis half-life of organic chemicals as a function of different pH and temperature conditions using only two-dimensional molecular descriptors with definite physicochemical significance. For each model, suitable subsets of variables ...
aMy biggest regret in life is that you do not accompany you through life from my last moments with you my dear grandmother 我的最大的遗憾在生活中是您不通过生活伴随您从我的前片刻与您我亲爱的祖母[translate] aJohnny Hits His Hot Blonde Stepmom's Ass 约翰尼击中他热的白肤金发的Stepmom的驴子...
to 1.0 ... use it as a multiplier. My website asks the user for their gender, age, weight, height, and overall health to determine a more realistic metabolism speed. The lower this value is, the faster the drug will metabolize and leave their body. So just multiply the half-life by...
Half-Life Questions and Answers - Practice questions, MCQs, PYQs, NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions, and PDF Questions with answers, solutions, explanations, NCERT reference, and difficulty level in
a period of usefulness or popularity preceding decline or obsolescence slang usually has a short half-life half-life词源中文解释 同时, half life(半衰期)一词最早出现于1864年,意为“不令人满意的生活方式”,由 half 和 life 组成; 在物理学中,“半衰期”指的是放射性物质衰变到一半所需的时间,该意义首...
The resulting (p,n) thresholds (in keV), half-lives (in msec) are as follows: Na (15419+/-6, 442+/-5) P (15 666+/-6, 266+/-4) Cl (13 902+/-9 and 13 978+/-16, 281+/-8) K (13 976+/-8, 336+/-4). The half-life of Al was measured as 2.054+/-0.009 sec....
All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas (specifically the isotope radon-222). When radium decays, ionizing radiation is a by-product, which can excite fluorescent chemicals and...
The apparent tendency to underestimate the uncertainty of experimentally determined half-life values of radionuclides is discussed. It is argued that the uncertainty derived from a least-squares analysis of a decay curve is prone to error. As it is quite common for a series of activity measurement...