Electric Charges

We look at how amino acids join together to form proteins, examining the primary, secondary and tertiary structures in detail - with reference made to insulin, myoglobin and haemoglobin. Quarternary struture is mentioned briefly and we also touch upon the meaning of fibrous and globular proteins.

This Chemistry lesson is titled Atomic Number Mass Number and Net Charge and will give a detailed explanation of the topic.

This very short video looks at the three different position isomers of dimethylbenzene (formerly known as xylene). It includes a look at their 3-d structures.

This short animation illustrates why metals are able to conduct an electric current. This is an update of a earlier video uploaded to this channel. I have changed the text font as requested.

Capillary electrophoresis is a separation technique in which charged species are separated, based on charge and size, by their different rates of migration in an electric field. The capillary is made of negatively charged fused silica inner wall which forms an electrical double layer with cations in the running buffer. These cations in the electrical double layer move towards the negative cathode and hence the overall direction of flow also known as the electroosmotic movement is towards the cathode. The sample is placed in the running buffer. All analytes will move with the same electroosmotic velocity driven by the running buffer but with different electrophoretic velocity which allows separation. Order of elution would be highest charge and smallest cations would elute first, followed by neutral species and the last to elute would be the highest charge and largest anions. Chemistry Movies & Molecular Animations are also available on the "Animol" app on Apple App Store and Google Play Store!