Jove
Visualize
Contact Us

Related Concept Videos

Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Measuring Reaction Rates03:09

Measuring Reaction Rates

Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...
Enzyme Kinetics01:19

Enzyme Kinetics

Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Measurement of Bioavailability: Pharmacodynamic Methods01:20

Measurement of Bioavailability: Pharmacodynamic Methods

Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.

You might also read

Related Articles

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

Sort by
Same author

Features in Backgrounds of Microscopy Images Introduce Biases in Machine Learning Analyses.

Journal of pharmaceutical sciences·2024
Same author

An Interlaboratory Comparison on the Characterization of a Sub-micrometer Polydisperse Particle Dispersion.

Journal of pharmaceutical sciences·2021
Same author

Waking Up With Cloudy Vision.

JAMA ophthalmology·2021
Same author

DEHP Nanodroplets Leached From Polyvinyl Chloride IV Bags Promote Aggregation of IVIG and Activate Complement in Human Serum.

Journal of pharmaceutical sciences·2019
Same author

Nanobubbles in Reconstituted Lyophilized Formulations: Interaction With Proteins and Mechanism of Formation.

Journal of pharmaceutical sciences·2019
Same author

Particle Formation and Aggregation of a Therapeutic Protein in Nanobubble Suspensions.

Journal of pharmaceutical sciences·2016
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: May 12, 2026

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils
04:40

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils

Published on: April 19, 2024

Biodiesel transesterification kinetics monitored by pH measurement.

William M Clark1, Nicholas J Medeiros, Donal J Boyd

  • 1Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA 01609, USA. wmclark@wpi.edu

Bioresource Technology
|April 11, 2013
PubMed
Summary

Monitoring biodiesel production is simplified by tracking pH changes during transesterification. This method accurately reflects reaction conversion, correlating well with glycerol measurements.

More Related Videos

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

Published on: October 21, 2016

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
09:10

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass

Published on: June 24, 2016

Related Experiment Videos

Last Updated: May 12, 2026

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils
04:40

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils

Published on: April 19, 2024

Original Experimental Approach for Assessing Transport Fuel Stability
09:48

Original Experimental Approach for Assessing Transport Fuel Stability

Published on: October 21, 2016

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
09:10

Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass

Published on: June 24, 2016

Area of Science:

  • Chemical Engineering
  • Biomass Conversion
  • Reaction Monitoring

Background:

  • Biodiesel production via transesterification is a key process for renewable energy.
  • Accurate monitoring of reaction progress is crucial for process optimization and efficiency.
  • Current monitoring methods can be complex or time-consuming.

Purpose of the Study:

  • To investigate the potential of pH change quantification as a simple monitoring method for vegetable oil transesterification.
  • To correlate pH changes with reaction conversion rates.
  • To understand the underlying mechanism of pH change during the reaction.

Main Methods:

  • Transesterification of canola oil using methanol and potassium hydroxide (KOH) catalyst at varying temperatures (25, 35, 45 °C).
  • Monitoring reaction progress through pH measurements.
  • Independent verification of conversion using an enzymatic glycerol assay.
  • Analysis of rate constants and comparison with literature values.

Main Results:

  • A strong correlation was observed between pH measurements and reaction conversion.
  • pH changes were found to be in agreement with glycerol concentration determined by enzymatic assay.
  • Rate constants derived from pH monitoring align with established literature values.
  • The observed pH change is primarily attributed to the dilution of hydroxide ions.

Conclusions:

  • pH monitoring offers a simple, effective, and reliable method for tracking the transesterification of vegetable oil to biodiesel.
  • The observed pH shift is a consequence of product formation and ion dilution, not direct reactant depletion.
  • This technique can be valuable for real-time process control in biodiesel production.