In vacuum tubes (including cathode ray tubes) it is the negative terminal where electrons enter the device from the external circuit and proceed into the tube's near vacuum, constituting a positive current flowing out of the device.

It is an enzyme that accepts electrons from electron transferring flavoprotein in the mitochondrial matrix, and uses these electrons to reduce ubiquinone.

And these are made of this kind of tube electricity tube, we call it in Holland.

A dorsal neural tube.

Franklin thought of the charge carrier as being positive, but he did not correctly identify which situation was a surplus of the charge carrier, and which situation was a deficit.

Mercury was added to the tube, trapping a fixed quantity of air in the short, sealed end of the tube.

This enzyme transfers electrons directly from ubiquinol to oxygen.

A secondary signaling center is then established in the roof plate, the dorsal most structure of the neural tube.

This is called a cycle valve tube.

The addition of electrons to FMN converts it to its reduced form, FMNH2.

His contributions to the series were honored in the name of the Jefferies tube , an equipment shaft depicted in various Star Trek series.

Alright, my favorite part.

He squeezed the toothpaste out of a tube.

Please buy a tube of toothpaste.

Although the transfer of four electrons and four protons reduces oxygen to water, which is harmless, transfer of one or two electrons produces superoxide or peroxide anions, which are dangerously reactive.

That's a fluorescent tube refined.

Valves control fluid flow and regulate pressure.

The earliest version of the CRT was invented by the German physicist Ferdinand Braun in 1897 and is also known as the Braun tube .

Hundreds of separate types of dehydrogenases remove electrons from their substrates and reduce NAD into NADH.

What in the design that made the difference is the boarding tubes the boarding tube gives to the bus the same performance as a subway.

The tube there's hollow, about paper thin.

It's victimless. It's meat from a test tube.

The nuclear forces arising between nucleons are now seen to be analogous to the forces in chemistry between neutral atoms or molecules called London forces.

Thus, the situation is effectively that some electrons have been transferred from one atom to the other.

There's a big pipe with the blood flowing through it, and around that pipe are the nerves drawing their nutrient supply from the blood.

The length of the tube determines the fundamental frequency.

The other tube then released the fake blood.

Now, to do that, we need to be able to bring a camera and instruments in together through one small tube, like that tube you saw in the laparoscopy video.

Or, not so coincidentally, like a tube like this.

Each pipe is tuned to a keynote, called the fundamental frequency.

You can't put toothpaste back in the tube.

The flow of electrons through the electron transport chain, from electron donors such as NADH to electron acceptors such as oxygen, is an exergonic process it releases energy, whereas the synthesis of ATP is an endergonic process, which requires an input of energy.

In this process, the superoxide anion is produced as a by product of several steps in the electron transport chain.

The electrons enter complex I via a prosthetic group attached to the complex, flavin mononucleotide (FMN).

And we can then tubularize this scaffold.

John Fleming invented the first radio tube, the diode, in 1904.

When a key is depressed, the key action admits wind into a pipe.

So we went over into Michael's garage his dad had all kinds of stuff, and we put a pipe in the vice there, and screwed a cap on the end of the pipe, drilled a hole in the back of the pipe, took some of our firecrackers, pulled out the fuses, tied them together, put them in the back there, and down in that hole and then stuffed some of our gunpowder down that pipe and put three ball bearings on the top, in the garage.

Here, she's trying to get a piece of meat out of a tube.

The little hole in the middle, we'll come to a bit later, but that's for the pollen tube to come out later on. A very tiny tube.

The electrons are then transferred through a series of iron sulfur clusters the second kind of prosthetic group present in the complex.

It'll approximate that shape. We do this for real in the test tube.

Speed is a desirable feature of a torpedo loading system, but safety is paramount.

If you look at this, just the tube, it is quite bright.

The first stage in vertebrates is called neurulation, where the neural plate folds forming the neural tube (see above).