• The absorption rate constant Ka is a value used in pharmacokinetics to describe the rate at which a drug enters into the system. It is expressed in units...
    1 KB (128 words) - 19:16, 12 July 2020
  • Zero-order absorption: rate of absorption is constant. A common example is continuous intravenous infusion. First-order absorption: rate of absorption is proportional...
    12 KB (1,400 words) - 09:51, 24 May 2025
  • drug's rate of absorption or the rate at which it enters the bloodstream is slower than its elimination rate. That is, when the ka (absorption constant) is...
    3 KB (303 words) - 16:25, 9 October 2021
  • Karnataka, India Ka, an acid dissociation constant Ka band, a microwave band Ka, the absorption rate constant of a drug Ka, number of non-synonymous substitutions...
    3 KB (454 words) - 14:02, 30 May 2025
  • absorption are Direct material cost percentage rate Direct labour cost percentage rate Prime cost percentage rate Labour hour rate Machine hour rate In...
    6 KB (965 words) - 14:16, 25 February 2021
  • factor F = Bioavailability D = Dose ke = Elimination rate constant ka = Absorption rate constant Vd = Volume of distribution τ = Dosing interval Cmin...
    3 KB (350 words) - 20:23, 29 May 2025
  • Thumbnail for Two-photon absorption
    the transition rate for two-photon absorption per unit volume, I {\displaystyle I} is the irradiance, ħ is the reduced Planck constant, ω {\displaystyle...
    44 KB (5,529 words) - 05:46, 31 May 2025
  • Thumbnail for Absorption refrigerator
    An absorption refrigerator is a refrigerator that uses a heat source to provide the energy needed to drive the cooling process. Solar energy, burning a...
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  • Thumbnail for Dynamometer
    range. Constant force test routines require the PAU to be set slightly torque deficient as referenced to prime mover output to allow some rate of acceleration...
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  • Thumbnail for Pharmacokinetics
    characteristics such as its acid dissociation constant (pKa), bioavailability and solubility, absorption capacity and distribution in the organism. A variety...
    41 KB (4,312 words) - 18:59, 9 April 2025
  • Thumbnail for Physiologically based pharmacokinetic modelling
    order absorption is a very common assumption. In that case the gut equation is augmented with an input term, with an absorption rate constant Ka: d Q...
    27 KB (3,156 words) - 00:35, 7 March 2025
  • saturated absorption, the relaxation rate of excitations does not depend on the intensity. Then, for the continuous-wave (cw) operation, the absorption rate (or...
    13 KB (1,593 words) - 21:26, 24 October 2024
  • Thumbnail for Electromagnetic absorption by water
    The absorption of electromagnetic radiation by water depends on the state of the water. The absorption in the gas phase occurs in three regions of the...
    28 KB (3,079 words) - 03:17, 25 May 2025
  • Thumbnail for Fine-structure constant
    result its light absorption and transmission properties can be expressed in terms of the fine-structure constant alone. The absorption value for normal-incident...
    63 KB (7,114 words) - 13:53, 6 June 2025
  • neutron absorber or a nuclear poison) is a substance with a large neutron absorption cross-section. In such applications, absorbing neutrons is normally an...
    19 KB (2,296 words) - 08:43, 21 February 2025
  • Thumbnail for Einstein coefficients
    the probability of absorption or emission of a photon by an atom or molecule. The Einstein A coefficients are related to the rate of spontaneous emission...
    32 KB (4,653 words) - 14:19, 28 April 2025
  • Thumbnail for Stimulated emission
    However, when a population inversion is present, the rate of stimulated emission exceeds that of absorption, and a net optical amplification can be achieved...
    21 KB (3,250 words) - 02:49, 25 May 2025
  • {\displaystyle A_{21}} is the rate of spontaneous emission. In the rate-equation A 21 {\displaystyle A_{21}} is a proportionality constant for this particular transition...
    24 KB (3,200 words) - 19:10, 23 May 2025
  • measurement of a decay rate rather than an absolute absorbance. This is one reason for the increased sensitivity over traditional absorption spectroscopy, as...
    11 KB (1,539 words) - 00:29, 24 August 2024
  • photons leave the cavity, for internal absorption or exiting the mirrors, expressed via the decay time constant τ p {\displaystyle {\tau _{p}}} and the...
    7 KB (1,250 words) - 12:04, 24 May 2025
  • Thumbnail for Radioactive decay
    Radioactive decay (redirect from Decay rate)
    significant number of identical atoms, the overall decay rate can be expressed as a decay constant or as a half-life. The half-lives of radioactive atoms...
    95 KB (9,852 words) - 17:21, 23 May 2025
  • Thumbnail for Planck's law
    proposed in some detail that absorption of light by his virtual material resonators might be continuous, occurring at a constant rate in equilibrium, as distinct...
    141 KB (18,064 words) - 16:26, 30 May 2025
  • Thumbnail for Exponential growth
    probability of neutron absorption exceeds the probability of neutron escape (a function of the shape and mass of the uranium), the production rate of neutrons and...
    24 KB (3,259 words) - 15:54, 23 March 2025
  • Thumbnail for Adsorption
    adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid (the absorbate) is dissolved by or permeates a liquid...
    55 KB (7,223 words) - 02:39, 2 June 2025
  • Thumbnail for Ultraviolet–visible spectroscopy
    each species and wavelength, ε is a constant known as the molar absorptivity or extinction coefficient. This constant is a fundamental molecular property...
    34 KB (4,440 words) - 01:30, 8 May 2025
  • Thumbnail for Glomerular filtration rate
    regulating sodium, potassium, and other electrolytes; clearing toxins; absorption of glucose, amino acids, and other small molecules; regulation of blood...
    56 KB (8,025 words) - 05:04, 25 May 2025
  • Thumbnail for Fick's laws of diffusion
    relatively slower adsorption of diluted solute. The adsorption or absorption rate of a dilute solute to a surface or interface in a (gas or liquid) solution...
    58 KB (8,249 words) - 16:41, 24 May 2025
  • Thumbnail for Topical medication
    degree of ionization, it is less polar. Therefore, it can have a faster absorption rate. The definition of the topical route of administration sometimes states...
    34 KB (4,137 words) - 19:47, 24 May 2025
  • Thumbnail for Neutron cross section
    the resonance remains essentially constant. But this does not imply constant neutron absorption. Despite the constant area under resonance a resonance...
    22 KB (2,865 words) - 13:59, 1 May 2025
  • Thumbnail for Dephasing
    the time constant of the longitudinal relaxation, T1. The time constant T2 is usually much smaller than T1, and the bandwidth of the absorption spectrum...
    7 KB (823 words) - 18:32, 24 May 2025