Related Experiment Video
Updated: May 3, 2026

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
Published on: February 6, 2016
Emissions of decamethylcyclopentasiloxane from Chicago
Andreas M Buser1, Christian Bogdal1, Matthew MacLeod2
1Institute for Chemical and Bioengineering, ETH Zurich, CH-8093 Zurich, Switzerland.
Abstract:
Decamethylcyclopentasiloxane (D5) is a high-production-volume chemical that is emitted to air in tens of thousands of tonnes each year globally. However, specific information about emission rates to air is still limited. Here we present an estimate of D5 emissions from the city of Chicago based on measurements that have recently been published. We used a multimedia environmental fate model parameterized for Chicago to back-calculate the emission rate of D5 from the measurements. Our estimated average emission rate for D5 is 500 (2.5-to-97.5-percentile interval: 260-1100) kg d(-1). The corresponding per-capita emissions of 190 (100-420) mg capita(-1)d(-1) agree well with previous estimates for Europe and North America.
More Related Videos
Related Concept Videos
Cycloalkanes
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
Stability of Substituted Cyclohexanes
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
Disubstituted Cyclohexanes: cis-trans Isomerism
In cyclohexane, the substituents can occupy different positions generating distinct isomers....
Mass Spectrometry: Cycloalkane Fragmentation
For example, cyclohexane molecular ions have a mass-to-charge ratio (m/z) of 84, which tends to produce a stronger signal than linear alkanes like hexane. This stability comes from...
Conformations of Cycloalkanes
Cyclohexenones via Michael Addition and Aldol Condensation: The Robinson Annulation

