Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Standard Solutions

Standard Solutions

Standard solutions refer to solutions with a precisely known concentration or composition. A primary standard is a highly pure, high molar mass, stable substance that is entirely soluble in water, the most commonly used solvent in analytical chemistry. The primary standard solution can be used to standardize secondary standards, which are substances with known concentrations but are less pure and stable. Standard solutions are essential for achieving accurate and reliable results in analytical...

Drug Dissolution: Requirements and Profile Comparison

The acceptance criteria for dissolution profile data are anchored in Q values, representing the percentage of drug dissolved within a specified period. This assessment unfolds in three stages:First Stage: The test passes if all six drug dosage units are equal to or greater than Q plus 5%; otherwise, the sample proceeds to the second stage.Second Stage: The average of twelve units must be equal to or greater than Q, with no unit falling below Q - 15% to pass; if not, it progresses to the final...

Indicators

Indicators

Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are called...

Titration of a Weak Acid with a Weak Base

Titration of a Weak Acid with a Weak Base

Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...

Solution Composition During Acid/Base Titrations

Solution Composition During Acid/Base Titrations

The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values represent the...

You might also read

Related Articles

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

Sort by

Same author

Neural processing of odor-associated words: an fMRI study in patients with acquired olfactory loss.

Brain imaging and behavior·2019

Same author

Sphingolipid-dependent Dscam sorting regulates axon segregation.

Nature communications·2019

Same author

Influence of external ear occlusion on food perception.

European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·2019

Same author

The Design Matters: How to Detect Neural Correlates of Baby Body Odors.

Frontiers in neurology·2019

Same author

Repair of cartilage defects with devitalized osteochondral tissue: A pilot animal study.

Journal of biomedical materials research. Part B, Applied biomaterials·2019

Same author

Nocturnal Olfactory Stimulation for Improvement of Sleep Quality in Patients With Posttraumatic Stress Disorder: A Randomized Exploratory Intervention Trial.

Journal of traumatic stress·2019

Search research articles

Related Experiment Video

Updated: Jun 12, 2026

Taste Exam: A Brief and Validated Test

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

Normative data for a solution-based taste test.

Janine Pingel¹, Jürgen Ostwald, Hans Wilhelm Pau

¹Department of Otorhinolaryngology, Head and Neck Surgery, University of Rostock, Doberaner Strasse 137-139, 18057, Rostock, Germany.

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery

|May 25, 2010

Summary

This summary is machine-generated.

This study assessed gustatory function in 944 adults using a reliable taste test. Findings show taste sensitivity declines with age and women are more sensitive than men.

More Related Videos

Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold (TDT) Test

Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold (TDT) Test

Published on: April 21, 2021

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Published on: July 16, 2016

Related Experiment Videos

Last Updated: Jun 12, 2026

Taste Exam: A Brief and Validated Test

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold (TDT) Test

Psychophysical Tracking Method to Assess Taste Detection Thresholds in Children, Adolescents, and Adults: The Taste Detection Threshold (TDT) Test

Published on: April 21, 2021

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Published on: July 16, 2016

Area of Science:

Neuroscience
Sensory Science
Psychophysics

Background:

Gustatory function is crucial for quality of life and detecting harmful substances.
Previous research on taste function has limitations in population size and methodology.
Understanding age and sex-related differences in taste is important for public health.

Purpose of the Study:

To evaluate gustatory function in a large general population sample.
To determine the test-retest reliability of a novel taste assessment method.
To investigate how age and sex influence taste sensitivity.

Main Methods:

Utilized liquid tastants (sucrose, citric acid, sodium chloride, quinine hydrochloride) at various concentrations.
Administered tastants to the anterior and posterior tongue bilaterally in 944 healthy subjects (ages 5-90).
Assessed test-retest reliability using correlation coefficients (r).

Main Results:

The taste test demonstrated good test-retest reliability (r=0.78 for total score).
Gustatory sensitivity significantly decreased with increasing age.
Women exhibited higher gustatory sensitivity compared to men across all age groups.

Conclusions:

The developed taste test is reliable and suitable for clinical gustatory function assessment.
The test is cost-effective, time-efficient, and easy to administer or self-prepare.
Age-related decline and sex-based differences in taste sensitivity are significant findings.