Jove
Visualize
Contact Us
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 Concept Videos

Amperometry: Overview01:10

Amperometry: Overview

432
Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
432
Amides to Carboxylic Acids: Hydrolysis01:28

Amides to Carboxylic Acids: Hydrolysis

3.1K
Amides can undergo either acid-catalyzed hydrolysis or base-promoted hydrolysis through a typical nucleophilic acyl substitution. Each hydrolysis requires severe conditions.
Acid-catalyzed hydrolysis:
Hydrolysis of amides under acidic conditions yields carboxylic acids. Since the reaction occurs slowly, hydrolysis requires the conditions of heat.
The mechanism begins with the protonation of the carbonyl oxygen by the acid catalyst. The protonation makes the amide carbonyl carbon more...
3.1K

You might also read

Related Articles

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

Sort by
Same author

Dynamic bidirectional diffusion-controlled multi-enzyme system for one-pot viral detection.

Journal of advanced research·2026
Same author

Connexin 43 promotes stemness of leukemia cells and chemoresistance in T-cell acute lymphoblastic leukemia via the RAC1/AKT/GSK3β axis.

Chinese medical journal·2026
Same author

Patient-reported outcomes in chronic GVHD: instruments, clinical utility, and survivorship integration.

Journal of patient-reported outcomes·2026
Same author

CES1 deficiency is associated with metabolic reprograming and endothelial dysfunction in pulmonary arterial hypertension.

American journal of respiratory and critical care medicine·2026
Same author

A Viscous DES-AAV-Foxo1 Delivery System With High Transfection Efficiency for the Treatment of Corneal Endothelial Dysfunction by Restoring Mitochondria-ER Contacts.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Harnessing brassinosteroid signaling in rice: from molecular pathways to environmentally adaptive breeding.

Frontiers in plant science·2026

Related Experiment Video

Updated: Jun 3, 2025

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
11:18

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation

Published on: January 7, 2019

8.4K

Humidity-Activated Ammonia Sensor Based on Carboxylic Functionalized Cross-Linked Hydrogel.

Yaping Song1, Yihan Xia1, Wei Zhang1

  • 1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.

Sensors (Basel, Switzerland)
|January 8, 2025
PubMed
Summary

A novel sensor detects ammonia (NH3) even in high humidity. Modified with urocanic acid, it shows improved response and recovery, enabling reliable gas detection in challenging environments.

Keywords:
fast recoveryhumidity-activated ammonia sensorurocanic acid

More Related Videos

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
12:05

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

15.4K
Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

Fast and Accurate Exhaled Breath Ammonia Measurement

Published on: June 11, 2014

13.4K

Related Experiment Videos

Last Updated: Jun 3, 2025

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
11:18

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation

Published on: January 7, 2019

8.4K
Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
12:05

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

15.4K
Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

Fast and Accurate Exhaled Breath Ammonia Measurement

Published on: June 11, 2014

13.4K

Area of Science:

  • Materials Science
  • Chemical Sensors
  • Environmental Monitoring

Background:

  • Ammonia (NH3) detection is critical due to its widespread use and toxicity.
  • High humidity significantly interferes with sensor performance, posing a detection challenge.
  • Existing sensors struggle with reliable ammonia detection in humid conditions.

Purpose of the Study:

  • To develop a humidity-activated ammonia sensor.
  • To overcome the challenge of ammonia detection in high-humidity environments.
  • To investigate the sensing mechanism using complex impedance plot (CIP) measurements.

Main Methods:

  • Synthesized a sensor by modifying poly (ethylene glycol) diacrylate (PEGDA) with urocanic acid (URA).
  • Utilized a thiol-ene click cross-linking reaction for sensor modification.
  • Employed complex impedance plot (CIP) measurements to study the sensing mechanism.

Main Results:

  • The optimized sensor demonstrated a 70% response to 50 ppm ammonia at 80% relative humidity (RH).
  • Achieved response and recovery times of 105.6 s and 346.8 s, respectively, with improved speeds.
  • Exhibited excellent selectivity for ammonia in high-humidity conditions.

Conclusions:

  • The urocanic acid-modified PEGDA sensor effectively detects ammonia in high humidity.
  • The sensor's performance is suitable for applications in consistently humid regions.
  • Potential applications include reliable respiratory gas monitoring in diverse environments.