Jove
Visualize
Contact Us

Related Concept Videos

The Small x Assumption02:20

The Small x Assumption

46.1K
If a reaction has a small equilibrium constant, the equilibrium position favors the reactants. In such reactions, a negligible change in concentration may occur if the initial concentrations of reactants are high and the Kc value is small. In such circumstances, the equilibrium concentration is approximately equal to its initial concentration.  This estimation can be used to simplify the equilibrium calculations by assuming that some equilibrium concentrations are equal to the initial...
46.1K
Arrhenius Plots02:34

Arrhenius Plots

39.4K
The Arrhenius equation relates the activation energy and the rate constant, k, for chemical reactions. In the Arrhenius equation, k = Ae−Ea/RT, R is the ideal gas constant, which has a value of 8.314 J/mol·K, T is the temperature on the kelvin scale, Ea is the activation energy in J/mole, e is the constant 2.7183, and A is a constant called the frequency factor, which is related to the frequency of collisions and the orientation of the reacting molecules.
The Arrhenius equation can be used...
39.4K
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

54
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
54
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation

498
This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
498
Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

Mechanistic Models: Compartment Models in Individual and Population Analysis

40
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
40
Henderson-Hasselbalch Equation02:48

Henderson-Hasselbalch Equation

69.1K
The ionization-constant expression for a solution of a weak acid can be written as:
69.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Gain Curves, Reproductive Efficiency, and Sex Allocation.

Ecology and evolution·2026
Same author

The nature of gain curves.

Biological reviews of the Cambridge Philosophical Society·2026
Same author

Pollination efficiency and the pollen-ovule ratio.

The New phytologist·2024
Same author

You can't always get what you want from pollinators.

The New phytologist·2024
Same author

Ancient insect vision tuned for flight among rocks and plants underpins natural flower colour diversity.

Proceedings. Biological sciences·2023
Same author

Widespread vulnerability of flowering plant seed production to pollinator declines.

Science advances·2021
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Jul 2, 2025

Study of Siphon Breaker Experiment and Simulation for a Research Reactor
08:45

Study of Siphon Breaker Experiment and Simulation for a Research Reactor

Published on: September 26, 2017

8.8K

Why the Shaw-Mohler equation works and when it doesn't.

Martin Burd1

  • 1Department of Biology, Indiana University Herbarium, Indiana University, Bloomington, IN, USA.

Biology Letters
|February 27, 2024
PubMed
Summary

Fitness gain curves can misrepresent sex allocation theory by bypassing mating processes. True fitness equality requires balanced investment in male and female functions, not just gain curves.

Keywords:
hermaphroditereproductive ecologysex allocationsex ratio

More Related Videos

Optimize Flue Gas Settings to Promote Microalgae Growth in Photobioreactors via Computer Simulations
14:33

Optimize Flue Gas Settings to Promote Microalgae Growth in Photobioreactors via Computer Simulations

Published on: October 1, 2013

14.4K
Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale
07:23

Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale

Published on: August 2, 2018

7.5K

Related Experiment Videos

Last Updated: Jul 2, 2025

Study of Siphon Breaker Experiment and Simulation for a Research Reactor
08:45

Study of Siphon Breaker Experiment and Simulation for a Research Reactor

Published on: September 26, 2017

8.8K
Optimize Flue Gas Settings to Promote Microalgae Growth in Photobioreactors via Computer Simulations
14:33

Optimize Flue Gas Settings to Promote Microalgae Growth in Photobioreactors via Computer Simulations

Published on: October 1, 2013

14.4K
Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale
07:23

Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale

Published on: August 2, 2018

7.5K

Area of Science:

  • Evolutionary Biology
  • Sex Allocation Theory

Background:

  • The Shaw-Mohler equation is foundational to sex allocation theory, modeling populations based on male and female numbers.
  • Frequency-dependent selection on the sex ratio is influenced by the rare-sex advantage.

Purpose of the Study:

  • To re-examine the Shaw-Mohler equation and the role of fitness gain curves.
  • To clarify the interpretation of gain curves in reproductive ecology and their relation to sex allocation.

Main Methods:

  • Analysis of the Shaw-Mohler equation framework.
  • Integration and critique of fitness gain curves within the existing theoretical model.

Main Results:

  • Fitness gain curves, when substituted into the Shaw-Mohler equation, bypass mating processes, potentially causing anomalies.
  • Equal total male and female fitness necessitates a constant sex allocation with equal resource investment.

Conclusions:

  • Gain curves can depict specific reproductive ecologies but do not causally determine sex allocation.
  • Misinterpretation arises from conflating input (resource investment) with output (fitness outcome).