Related Experiment Video

Updated: Jul 20, 2026

Identification of Fatty Acids in Bacillus cereus
08:41

Identification of Fatty Acids in Bacillus cereus

Published on: December 5, 2016

A chiasma-hormonal hypothesis relating Down's syndrome and maternal age

P H Crowley, D K Gulati, T L Hayden

    Nature
    |August 2, 1979
    PubMed
    Abstract

    No abstract available in PubMed .

    More Related Videos

    Assessing Cellular Stress and Inflammation in Discrete Oxytocin-secreting Brain Nuclei in the Neonatal Rat Before and After First Colostrum Feeding09:12

    Assessing Cellular Stress and Inflammation in Discrete Oxytocin-secreting Brain Nuclei in the Neonatal Rat Before and After First Colostrum Feeding

    Published on: November 14, 2018

    Measurement of Oxygen Consumption Rates in Intact Caenorhabditis elegans08:10

    Measurement of Oxygen Consumption Rates in Intact Caenorhabditis elegans

    Published on: February 23, 2019

    Related Concept Videos

    Rate-Determining Steps03:08

    Rate-Determining Steps

    Relating Reaction Mechanisms
    In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
    The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
    The Nernst Equation02:59

    The Nernst Equation

    Nonstandard Reaction Conditions
    The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
    Relative Reactivity of Carboxylic Acid Derivatives01:13

    Relative Reactivity of Carboxylic Acid Derivatives

    Carboxylic acid derivatives such as acid halides, anhydrides, esters, and amides undergo nucleophilic acyl substitution reactions with varying degrees of reactivity.
    A key factor in assessing the reactivity of the acid derivatives is the basicity of the substituent or the leaving group. The lower the basicity of the leaving group, the higher the reactivity of the derivative. The basicity of the leaving group follows this order:
    Halide ions < Acyloxy ions < Alkoxy ions < Amine ions
    Diels&ndash;Alder vs Retro-Diels&ndash;Alder Reaction: Thermodynamic Factors01:31

    Diels–Alder vs Retro-Diels–Alder Reaction: Thermodynamic Factors

    The Diels–Alder reaction is thermally reversible, meaning that the reaction reverts to the starting diene and dienophile under suitable temperatures. The forward reaction gives a cyclohexene derivative and is favored at low to medium temperatures. The reverse process, also called retro-Diels–Alder reaction, is a ring-opening process favored at high temperatures.
    Criteria for Aromaticity and the H&uuml;ckel 4n + 2 Rule01:20

    Criteria for Aromaticity and the Hückel 4n + 2 Rule

    Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?
    For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as Hückel’s rule or the 4n + 2 rule.
    The Physiology of Taste01:24

    The Physiology of Taste

    The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...