Ciro Santilli @cirosantilli 35

In the context of Maxwell's equations, it is vector field that is one of the inputs of the equation.

Section "Maxwell's equations with pointlike particles" asks if the theory would work for pointlike particles in order to predict the evolution of this field as part of the equations themselves rather than as an external element.

Measured in amperes in the International System of Units.

For some reason Chinese people (and their sphere of influence such as Japan) are obsessed by numbered lists, e.g. stuff like Four Beauties, Four Treasures of the Study and so on!

The concept does exist in the West (e.g. The Seven Wonders of the World), but clearly the Sinosphere is much more obsesse by it!

Lit. "to kick (leather) ball".

Figures notbaly in Water Margin, where it is played by Gao Qiu. The novel also suggests that it was considered a lesser art, e.g. as opposed to the scholarly four arts and the "proper" martial arts.

20 minutes in optimal conditions, with a crazy multiple start sites mechanism: E. Coli starts DNA replication before the previous one finished.

Otherwise, naively, would take 60-90 minutes just to replicate and segregate the full DNA otherwise. So it starts copying multiple times.

The second protein to have its structure determined, after myoglobin, by X-ray crystallography, in 1965.

Breaks up peptidoglycan present in the bacterial cell wall, which is thicker in Gram-positive bacteria, which is what this enzyme seems to target.

Part of the inate immune system.

It is present on basically everything that mammals and birds excrete, and it kills bacteria, both of which are reasons why it was discovered relatively early on.

As of 2022, this channel is still finding its feet. But it has promise.

Unfortunately it does not show sample preparation, and it does not use controlled cultures, so we are never sure which species are represented.

One notable application: cryptocurrency, see e.g. how Bitcoin works.