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Related Concept Videos

Life Histories01:29

Life Histories

Overview
Inclusive Fitness00:57

Inclusive Fitness

Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
Fermentation01:29

Fermentation

Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
Journal Bearings01:23

Journal Bearings

Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...

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Related Experiment Video

Updated: May 17, 2026

BioMEMS: Forging New Collaborations Between Biologists and Engineers
07:26

BioMEMS: Forging New Collaborations Between Biologists and Engineers

Published on: November 1, 2007

Guest Editorial: David Jonas Festschrift.

Dmitry Baranov1, Nadia Belabas2, Kevin Kubarych3

  • 1Division of Chemical Physics and NanoLund, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.

The Journal of Chemical Physics
|May 15, 2026
PubMed
Summary
This summary is machine-generated.

This collection explores cutting-edge multidimensional and ultrafast spectroscopies. It covers diverse applications from biological systems to nanomaterials, highlighting experimental and theoretical advances.

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Last Updated: May 17, 2026

BioMEMS: Forging New Collaborations Between Biologists and Engineers
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05:41

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Area of Science:

  • Spectroscopy
  • Physical Chemistry
  • Biophysics

Background:

  • The David Jonas Festschrift comprises 67 contributions.
  • It focuses on multidimensional and ultrafast spectroscopic techniques.

Purpose of the Study:

  • To summarize the latest developments and applications in spectroscopy.
  • To provide an overview of diverse research areas within the field.

Main Methods:

  • The collection covers experimental advances.
  • It includes theoretical and computational approaches.

Main Results:

  • Contributions span proteins and biological systems.
  • Applications in nanomaterials, molecules, liquids, and soft matter are discussed.

Conclusions:

  • The Festschrift offers a comprehensive look at the current state of spectroscopy.
  • It highlights the interdisciplinary nature and broad applicability of these techniques.