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Related Concept Videos

Olfaction01:25

Olfaction

40.5K
The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
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Related Experiment Video

Updated: May 2, 2026

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
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Artificial olfactory memory system based on conductive metal-organic frameworks.

Xiaomeng Yin1,2, Hao Zhang3, Xuezhi Qiao1,2

  • 1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, P. R. China.

Nature Communications
|September 27, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed an artificial olfactory memory system using conductive metal-organic frameworks (Ce-HHTP) that mimics human smell memory. This system can distinguish between different odors, paving the way for advanced bionic applications.

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Area of Science:

  • Materials Science
  • Chemical Sensing
  • Biomimetic Systems

Background:

  • The human olfactory system creates lasting sensory memories, influencing decisions.
  • Current electronic noses lack the ability to form persistent smell memories.
  • Existing sensors typically measure only the momentary concentration of odorants.

Purpose of the Study:

  • To develop an artificial olfactory system with integrated sensing and memory capabilities.
  • To create a system capable of generating distinct short- and long-term memories for different odors.
  • To explore the potential of this system in real-world applications like environmental monitoring and health management.

Main Methods:

  • Utilized conductive metal-organic frameworks (Ce-HHTP) for sensing and memory.
  • Investigated the interactions between Ce-HHTP and guest molecules (alcohols, aldehydes) using experiments and theoretical calculations.
  • Integrated the system into an unmanned aircraft and portable detection devices.

Main Results:

  • The Ce-HHTP system demonstrated both short- and long-term memory responses to alcohols and aldehydes.
  • Distinct memories were attributed to specific interactions between Ce-HHTP and oxygen atoms in guest molecules.
  • Successful sensory memory implementation was achieved in established areas using an unmanned aircraft.

Conclusions:

  • An artificial olfactory memory system with integrated sensing and memory functions was successfully created.
  • The system exhibits bionic qualities, mimicking human olfactory memory with distinct sensory memories.
  • The technology holds significant potential for off-site pollution monitoring and personalized health management through wearable devices.