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Production Efficiency01:01

Production Efficiency

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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Trophic Efficiency00:46

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Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
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The hypothetical Carnot cycle consists of an ideal gas subjected to two isothermal and two adiabatic processes. Since the internal energy of an ideal gas depends only on its temperature, which is the same before and after the completion of the Carnot cycle, there is no change in its internal energy. Hence, using the first law of thermodynamics, the total heat exchanged by the ideal gas equals the total work done. Thus, we can quantify the efficiency of the Carnot cycle via the heat exchanged...
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Turnover Number and Catalytic Efficiency01:19

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The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
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Column Efficiency: Plate Theory01:10

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Band broadening in a chromatography column is measured by its efficiency. This is determined by the number of theoretical plates (N). Theoretical plate theory states that a separation column consists of a continuous series of imaginary plates where solute equilibration occurs between stationary and mobile phases.
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Column Efficiency: Rate Theory01:12

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The rate theory of chromatography provides quantitative insight into the shapes and widths of elution bands. These bands are based on the random-walk mechanism governing molecular migration within a column. The Gaussian profile of chromatographic bands arises from the cumulative effect of random molecular motions as they progress through the column.
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Efficient and Site-specific Antibody Labeling by Strain-promoted Azide-alkyne Cycloaddition
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Efficiency Is Everything: Promoting Efficient Practice by Harnessing Derived Stimulus Relations.

Thomas S Critchfield1

  • 1Department of Psychology, Illinois State University, ISU Campus Box 4620, Normal, IL 61790 USA.

Behavior Analysis in Practice
|October 27, 2018
PubMed
Summary

Practitioners need emergent learning skills for effective applied behavior analysis. Graduate training must include stimulus relations to develop these crucial applied behavior analysis practice skills.

Keywords:
Derived stimulus relationsEmergent learningStimulus equivalence

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Area of Science:

  • Behavioral science
  • Psychology

Background:

  • Effective applied behavior analysis (ABA) practice requires practitioners to engineer emergent learning.
  • Developing emergent learning is a key objective for ABA graduate training.

Purpose of the Study:

  • To highlight the importance of stimulus relations in ABA graduate training.
  • To advocate for the integration of stimulus relations research and concepts into ABA curricula.

Main Methods:

  • Review of current ABA graduate training standards.
  • Analysis of research on stimulus relations and emergent learning.

Main Results:

  • Current ABA graduate training may not sufficiently emphasize stimulus relations.
  • Stimulus relations are fundamental to understanding and engineering emergent learning.

Conclusions:

  • ABA graduate programs must prioritize teaching stimulus relations.
  • Enhanced focus on stimulus relations will better equip practitioners with emergent learning skills.