Related Experiment Video

Updated: Jul 30, 2026

Transient Expression of Foreign Genes in Insect Cells (sf9) for Protein Functional Assay
11:12

Transient Expression of Foreign Genes in Insect Cells (sf9) for Protein Functional Assay

Published on: February 22, 2018

Sex pheromone specificity in the pine sawflies: interchange of acid moieties in an ester

D M Jewett, F Matsumura, H C Coppel

    Science (New York, N.Y.)
    |April 2, 1976
    PubMed

    More Related Videos

    The Determination of Protease Specificity in Mouse Tissue Extracts by MALDI-TOF Mass Spectrometry: Manipulating PH to Cause Specificity Changes09:47

    The Determination of Protease Specificity in Mouse Tissue Extracts by MALDI-TOF Mass Spectrometry: Manipulating PH to Cause Specificity Changes

    Published on: May 25, 2018

    Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects09:45

    Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects

    Published on: April 21, 2018

    Related Concept Videos

    Fruit Development, Structure, and Function01:58

    Fruit Development, Structure, and Function

    Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.
    Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview01:20

    Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview

    The Fischer esterification reaction was developed by the German chemist Emil Fischer in 1895. It is a condensation reaction between carboxylic acids and alcohols in an acidic medium to give esters and water.
    Mass Spectrometry: Carboxylic Acid, Ester, and Amide Fragmentation01:01

    Mass Spectrometry: Carboxylic Acid, Ester, and Amide Fragmentation

    The fragmentation patterns observed for compounds such as carboxylic acids, esters, and amides in the mass spectra include ⍺-cleavage and McLafferty rearrangement. Fragmentation by ⍺-cleavage preferentially occurs at the carbon-carbon bond at the ⍺-position next to the carboxylic group to generate a neutral radical and a cation. Long chain compounds with hydrogen at their γ-carbon undergo McLafferty rearrangement to give a radical cation and a neutral alkene.
    For example, the fragmentation of...
    Substituent Effects on Acidity of Carboxylic Acids01:31

    Substituent Effects on Acidity of Carboxylic Acids

    The acidity of carboxylic acids is influenced by the nature of the substituents bounded to the functional group. The acid strength is determined by the stability of the carboxylate anion—the conjugate base formed by dissociating the corresponding carboxylic acid.
    Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism01:13

    Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism

    Carboxylic acids react with alcohols to yield esters via an acid-catalyzed condensation reaction called Fischer esterification. This is a nucleophilic acyl substitution reaction that proceeds via a tetrahedral intermediate, where a water molecule is eliminated as the leaving group.