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Related Concept Videos

Nonlinear Pharmacokinetics: Causes of Nonlinearity01:22

Nonlinear Pharmacokinetics: Causes of Nonlinearity

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Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
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The Michaelis–Menten equation is a fundamental model for describing capacity-limited kinetics in drug metabolism. It offers insights into the rate of decline of plasma drug concentration Cp over time, with Vmax and KM as pivotal parameters.
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A drug's nonlinear kinetics can be influenced by a diverse range of transporter proteins that serve as crucial players in drug distribution. These transporters, found within cells, can enhance or reduce local drug concentrations by facilitating the influx or efflux of drugs. For instance, the expression of xenobiotic transporters can be influenced by factors such as age and gender, potentially impacting the linearity of drug response.
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Related Experiment Video

Updated: Jan 25, 2026

Biomolecular Imaging of Cellular Uptake of Nanoparticles using Multimodal Nonlinear Optical Microscopy
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Optical wireless information transfer with nonlinear micromechanical resonators.

Joseph A Boales1, Farrukh Mateen2, Pritiraj Mohanty1

  • 1Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA.

Microsystems & Nanoengineering
|May 7, 2019
PubMed
Summary

This study introduces a novel wireless information transfer method using optical transmission and micromechanical resonators. This approach achieves perfect data and image fidelity, offering a secure and high-bandwidth alternative to radio waves.

Keywords:
MEMSpiezoelectricityradiation pressurewireless communication

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Area of Science:

  • Physics
  • Engineering
  • Communications

Background:

  • Modern wireless communication relies on radio waves (100 MHz to GHz), facing challenges in data security.
  • Existing wireless technologies like cellular, WiFi, Bluetooth, and GPS have limitations in bandwidth and security.

Purpose of the Study:

  • To demonstrate a new method for secure wireless information transfer using optical frequencies.
  • To explore the potential of micromechanical resonators for high-fidelity data transmission.

Main Methods:

  • Utilized a line-of-sight optical architecture with a nonlinear micromechanical resonator.
  • Encoded information onto a laser beam, which impinged on the resonator.
  • Leveraged radiation pressure from photons to modulate the resonator and transfer data.

Main Results:

  • Achieved 100% fidelity in data and image transfer using a single silicon micromechanical resonator.
  • Demonstrated wireless information transfer in the optical frequency band, which is 10,000 times wider than the radio frequency band.
  • The mechanical approach relies on photon momentum, enabling use of any optical frequency.

Conclusions:

  • The novel micromechanical resonator approach offers a fundamentally new paradigm for wireless communication.
  • Scalable micromechanical resonators in a line-of-sight architecture present new possibilities for secure, high-bandwidth wireless transmission.
  • The small form factor and array potential of resonators allow for redundancy and parallelism in communication systems.