There are multiple ways of measuring the pH value of a solution, one of which is to use indicator paper. Indicator paper changes color depending on the pH of the solution applied to it, and by comparing to a chart a fairly accurate measure of the solution's pH can be obtained. If a more accurate measure is needed, a glass electrode can be used, which works by measuring the conductivity of the solution.

PH

Indicator Paper

That's on a piece of 8 by 12 paper.

If you take a sea urchin larva from 8.1, put it in a pH of 7.7 not a huge change it becomes deformed and dies.

You could do it to your own kid. It changes color.

No.

Try rearranging the cards

And you flip it over, and it's the amino acids with the PH at which they have different charges.

I'm thinking dipstick.

And there are two bars. One bar indicates that the test is working, and if the second bar shows up, you're pregnant.

HH MM SS pH MM SS AMPM

12. quot La notion d apos actes de gouvernement en droit zaïrois quot (in Mélanges Ph.

A third of the people we passed the sheet, they gave it back to us.

Or that he'd try to peddle a phony tip to a newspaper!

Now in the laboratory, if you take a clam and you put it in the pH that is not 8.1, which is the normal pH of seawater, but 7.5, it dissolves in about three days.

So, it's a solved problem, that particular problem is solved.

Now in the laboratory, if you take a clam and you put it in the pH that is not 8.1, which is the normal pH of seawater but 7.5, it dissolves in about three days.

The second is, you can put lots and lots of tests in a very small place.

It is printing. You put that on, you warm it a little bit, the wax prints through so it absorbs into the paper, and you end up with the device that you want.

And they took the briquettes back to MIT so that they could test them.

There are an awful lot of colors and things like that.

So the first question, and you might want to write this down, either on a bit of paper, physically, or a virtual piece of paper in your head. And, for viewers at home, you can try this as well.

And what you see, at the lower right hand side there, is a sample in which a single sample of blood has been put on the top, and it has gone through and distributed itself into these 16 holes on the bottom, in a piece of paper basically it looks like a chip, two pieces of paper thick.

So, you take the drop of blood, no further manipulations, you put it on a little device, the device filters out the blood cells, lets the serum go through, and you get a series of colors down in the bottom there.

Like paper, paper and cardboard.

All the way at the other end, in an alkaline environment, at a pH of 11, life existed.

I knew another young man, though, who had PH who died while waiting for one.

There are also dipsticks, but if you look at the dipsticks, they're for another kind of urine analysis.

Paper and paperboard

When newspaper Svenska Dagbladet investigated the 581 results released however it found that in 243 of the cases the person had openly stated that they turn 18 this year.

Pulp and paper industry

Feels as if there is paper in it. Paper?

The natural world is always much more complex than formulations in the lab or blueprints in the design office.

We have made these kinds of devices using napkins and toilet paper and wraps, and all kinds of stuff.

Paper and paper products

So now, we can use this counting to try and get at much bigger things than DNA origami could otherwise.

And I must say, before I go on, I should ask every one of you to try and get out pen and paper because I'm actually going to ask you to help me to look at how we do that.

The pH of 11, and yet it had chemosynthetic bacteria living in it and at this extreme environment.

Paper. Paper. Tonight's final.

If you take a sea urchin larva from 8.1, put it in a pH of 7.7 not a huge change it becomes deformed and dies.

Well, if the peak pH that cells have is around seven, those hydrogen bonds couldn't exist.

So, it works very well there, but it doesn't work very well when you need more quantitative information.

And this is produced by bacteria who are actually making more sulfuric acid, and living at pHs right around zero.

We'd sit in front of the fire and play double solitaire and Chinese chequers.