Catalysts can be optimised for given reactions. The trick is to use just the right amount for the amount of product, flow rate, and operating conditions. If you are impatient, increasing the amount of catalyst can usually be counted on increasing the reaction rate. For example, the early catalytic converters on cars had lots of platinum. Modern converter use much less but do use more surface area and platinum metal mixtures to accomplish the same thing.

not normal, no, but I wouldn't be too worried about it if I were you, unless you have to use the toilet this often on a regular basis, probably just nothing x

The new homepage is still in testing, the beta stage, it could be like that for a long time. Yahoo is not giving up that info. Look how long the New Mail was called the Beta mail before they officially named it the All New Mail. And there are still problems with it. The new homepage has changed since they first introduced it. I had it for a couple of days a few months ago, it disappeared and now it's more elaborate. So who knows.

I liked it just the way it was…now I can't tell when a comment was posted and it looks to cyber infested. It seems Youtube gets shittier and shittier with each new idea they come up with.